WO2018171783A1

WO2018171783A1 - Method, apparatus and system for signal transmission

Info

Publication number: WO2018171783A1
Application number: PCT/CN2018/080387
Authority: WO
Inventors: 孙裕; 秦熠; 栗忠峰; 张雷鸣; 窦圣跃
Original assignee: 华为技术有限公司
Priority date: 2017-03-24
Filing date: 2018-03-24
Publication date: 2018-09-27

Abstract

Disclosed in an embodiment of the present invention is a signal transmission method. The method comprises: a first device sends to a second device a first reference signal, the first reference signal being used for phase tracking; and the first reference signal is mapped to a first symbol, wherein the first symbol comprises a symbol carrying a data signal in front of a second symbol, the second symbol indicating at least one successive symbol carrying a DMRS, and the at least one symbol comprises a first symbol carrying the DMRS. The method of the present invention can ensure the presence of phase tracking reference signal (PT-RS) mapping in a data channel mapped to a symbol in front of a DMRS, thus ensuring phase noise estimation performance.

Description

Signal transmission method, device and system

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a signal transmission method, apparatus, and system.

Background technique

With the development of mobile Internet technology, the communication rate and capacity demand are increasing, and the existing low-spectrum resources are becoming more and more tense, which has been difficult to meet the demand. Therefore, the high-frequency wireless resources rich in spectrum resources have become the research hotspot of wireless communication. In a wireless communication system, the frequency device, the local oscillator, is non-ideal, and the random jitter of the local oscillator causes the output carrier signal to carry phase noise. The phase noise is directly related to the carrier frequency: the phase noise power varies by 20 log(n), and n is the frequency multiplier, that is, the doubling of the carrier frequency increases the phase noise power by 6 dB. Therefore, for high frequency wireless communication, the phase noise effect cannot be ignored. The 3rd Generation Partnership Project (3GPP) has included high-frequency into the spectrum range adopted in the future evolution of the new wireless radio network (NR), so the phase noise-related impact needs to be included. Design considerations.

The most commonly used method for phase noise estimation is to estimate the phase error using an inserted phase tracking reference signal (PT-RS). At present, new radio (NR) has supported the symbol-level time domain density of various PT-RSs. As shown in FIG. 1, in the time domain, the PT-RS may be continuously mapped on each symbol of the PUSCH (or PDSCH) (ie, "1 time domain density" shown in the figure), or may be on the PUSCH (or PDSCH). Mapped once every 2 symbols (ie, "1/2 time domain density" shown in the figure), and can also be mapped once every 4 symbols of the PUSCH (or PDSCH) (ie, as shown in the figure) 1/4 time domain density").

In a further discussion of NR communication technology standards, the 3GPP Working Group has agreed on the following proposals:

The physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) can be transmitted on the same symbol by frequency division, which results in demodulation reference signal (Demodulation Reference Signal). PDSCH is also mapped on the symbol before DMRS). For example, as shown in FIG. 2, the DMRS is mapped on

symbols

3, 4, the PDCCH is mapped on

symbols

0, 1, and the PDSCH is also mapped on

symbols

0, 1.

In addition, there is currently no determined binding relationship between the time domain symbol position of the DMRS and the symbol number of the PDCCH, which also causes the PDSCH to be mapped on the symbols before the DMRS. For example, as shown in FIG. 2, a PDSCH is mapped on symbol 2, and is mapped before the symbol of the DMRS.

However, the symbol mapping scheme of the existing PT-RS as shown in FIG. 1 considers that the starting symbol of the PT-RS mapping is a symbol following the DMRS symbol, and can only be used to estimate the data channel mapped after the DMRS symbol. Phase noise.

Summary of the invention

The present application provides a signal transmission method, apparatus and system, which can ensure that a data channel mapped on a symbol before a DMRS also has a PT-RS mapping, thereby ensuring phase noise estimation performance.

In a first aspect, the present application provides a signal transmission method, which is applied to a first device side (ie, a transmitting end), the method includes: the first device sends a first reference signal to a second device, where the first reference signal is used for phase track. The first reference signal is mapped on the first symbol, the first symbol includes a symbol of a bearer data signal before the second symbol in the time domain unit, and the second symbol refers to a bearer demodulation in the time domain unit. The first symbol of the reference signal, or the second symbol, refers to a plurality of consecutive symbols within the time domain unit, the consecutive plurality of symbols including a first symbol carrying a demodulation reference signal.

In a second aspect, the present application provides a signal transmission method, which is applied to a second device side (ie, a receiving end). The method includes: receiving, by a second device, a first reference signal sent by the first device. The first reference signal is mapped on the first symbol, the first symbol includes a symbol of a bearer data signal before the second symbol in the time domain unit, and the second symbol refers to a bearer demodulation in the time domain unit. The first symbol of the reference signal, or the second symbol, refers to a plurality of consecutive symbols within the time domain unit, the consecutive plurality of symbols including a first symbol carrying a demodulation reference signal.

In the present application, the second symbol is a symbol carrying the pre-loaded DMRS. The first reference signal is PTRS.

Implementing the signal transmission methods described in the first aspect and the second aspect ensures that the data channel mapped on the symbols preceding the DMRS also has PT-RS mapping, thereby ensuring phase noise estimation performance.

In combination with the first aspect or the second aspect, the mapping of the PT-RS may include the following two parts:

1. PT-RS mapping on the symbol of the bearer data signal before the second symbol (the symbol carrying the pre-loaded DMRS).

2. PT-RS mapping on the symbol of the bearer data signal following the second symbol (the symbol carrying the pre-loaded DMRS).

Here, the symbol before the second symbol refers to the symbol whose index is smaller than the index of the second symbol, and the symbol after the second symbol refers to the symbol whose index is larger than the index of the second symbol.

(1) PT-RS time domain mapping rule on symbols before the second symbol

The first mapping rule, the PT-RS can be mapped on the first symbol of the bearer data signal preceding the second symbol. That is to say, the PT-RS is mapped starting from the first symbol of the data channel (PUSCH/PDSCH). This ensures that the data channel on the symbol before the second symbol also has a PT-RS mapping, thereby ensuring phase noise estimation performance.

The second mapping rule, before the second symbol, the index of the symbol used to carry the PT-RS is related to the first difference, and the first difference (H2) is the index (l ₀ ) of the first symbol carrying the DMRS. The difference from the index of the first symbol carrying the data signal. That is, before the second symbol, the index of the symbol used to carry the PT-RS is related to the number of symbols before the second symbol.

(2) PT-RS time domain mapping rule on the symbol after the second symbol

The first mapping rule, after the second symbol, the index of the starting symbol mapped by the PT-RS may be determined by the time domain density of the PT-RS. And in the order in which the symbol index values are incremented, the PT-RS is mapped on the symbol with the smallest index among every L symbols. L is the reciprocal of the time domain density of the PT-RS.

Specifically, the time domain density of the PT-RS may be related to at least one of a CP type, a subcarrier spacing, and a modulation order. For details, refer to the following content, and details are not described herein. Specifically, the time domain density of the PT-RS, and the mapping relationship between the time domain density of the PT-RS and the index of the start symbol mapped by the PT-RS may be predefined by a protocol, or may be passed by the network device through a high layer letter. Order (such as RRC signaling) or PDCCH configuration.

In the second mapping rule, the PT-RS can be uniformly mapped over the entire time domain symbol (including the second symbol, the symbol before the second symbol and the symbol after the second symbol). Thus, the PT-RS is also uniformly mapped on the symbol following the second symbol. Optionally, the mapping priority of the PT-RS is lower than the PDCCH or the PUCCH or the SS block or the CSI-RS or the SRS.

A third mapping rule, the PT-RS is mapped on the last symbol of the bearer data signal after the second symbol, and uniformly mapped on the symbol following the second symbol in descending order of the symbol index value.

A fourth mapping rule, after the second symbol, the index of the symbol used to carry the PT-RS is related to the number of symbols after the second symbol.

In combination with the first aspect or the second aspect, based on the PT-RS time domain mapping rule, in the first embodiment, the PTRS mapping carries the first symbol of the data signal (PDSCH/PUSCH) in the time domain unit. Optionally, in the time domain unit, the PTRS maps the smallest symbol in each L symbols in the order in which the symbol index values are incremented. That is, starting from the first symbol carrying the data signal, the PT-RS can be uniformly mapped in the time domain unit. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

With reference to the first aspect or the second aspect, based on the foregoing PT-RS time domain mapping rule, in the second embodiment, in the time domain unit, the location of the symbol carrying the PTRS may be the symbol carrying the pre-loaded DMRS (ie, the second symbol) The position of the ) and the first symbol of the bearer data signal (PDSCH/PUSCH) are related to the last symbol. Here, the first symbol carrying the data signal refers to a symbol having the smallest index among the symbols of the bearer data signal (PDSCH/PUSCH) in the time domain unit. The last symbol carrying the data signal refers to the symbol with the largest index among the symbols of the bearer data signal (PDSCH/PUSCH) in the time domain unit.

Specifically, in the time domain unit, starting from the first symbol carrying the data signal, the PT-RS may be uniformly mapped on the symbol before the second symbol in the order of increasing symbol index values. In the time domain unit, starting from the last symbol of the bearer data signal, the PT-RS may be uniformly mapped on the symbol following the second symbol in descending order of the symbol index value.

In combination with the first aspect or the second aspect, based on the foregoing PT-RS time domain mapping rule, in Embodiment 3, the location of the symbol carrying the PTRS may be related to the location of the symbol carrying the pre-loaded DMRS (ie, the second symbol). Optionally, the location of the symbol carrying the PTRS is also the symbol carrying the pre-loaded DMRS (ie, the second symbol), the symbol index in the time domain unit is smaller than the number of symbols of the index of the first symbol carrying the pre-loaded DMRS, and the time domain. The intra-unit symbol index is related to the number of symbols of the index of the last symbol of the pre-loaded DMRS.

In the third embodiment, specifically, in the time domain unit, the index of the last symbol carrying the PTRS before the second symbol is related to the first difference. Moreover, starting from the index of the last symbol carrying the PTRS, the PTRS is uniformly mapped on the symbol of the bearer data signal preceding the second symbol in descending order of the symbol index. Specifically, in the time domain unit, the index of the first symbol carrying the PTRS after the second symbol is related to the number of symbols after the second symbol. Moreover, starting from the index of the first symbol carrying the PTRS, the PTRS is uniformly mapped on the symbol following the second symbol in the order in which the symbol index is incremented.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/2, that is, L=2, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ of the index of the last symbol carrying the pre-loaded DMRS is an odd number, and the PTRS is mapped on the symbol with the index l _DM-RS +1. Optionally, starting from a symbol with an index of l _DM-RS +1, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. If the difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is an odd number, the index is l ₀ -1 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -1, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/2, that is, L=2, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ of the index of the last symbol carrying the pre-loaded DMRS is an even number, and the PTRS is mapped on the symbol with the index l _DM-RS +2. Optionally, starting from a symbol with an index of l _DM-RS +2, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. If the difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is even, the index is l ₀ -2 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -2, the PTRS may be evenly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/4, that is, L=4, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ of the index of the last symbol carrying the pre-loaded DMRS is an integer multiple of 4, and the PTRS is mapped on the symbol with the index l _DM-RS +4. Optionally, starting from a symbol with an index of l _DM-RS +4, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is an integer multiple of 4, and the index is l ₀ PTRS is mapped on the -4 symbol. Optionally, starting from a symbol with an index of l ₀ -4, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/4, that is, L=4, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ mod4=1 of the index of the last symbol of the pre-loaded DMRS is mapped, and the PTRS is mapped on the symbol with the index l _DM-RS +1. Optionally, starting from a symbol with an index of l _DM-RS +4, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=2, and the index is l ₀ -1 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -1, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/4, that is, L=4, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ mod4=2 of the index of the last symbol of the pre-loaded DMRS is carried, and the PTRS is mapped on the symbol with the index l _DM-RS +2. Optionally, starting from a symbol with an index of l _DM-RS +2, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=2, and the index is l ₀ -2 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -2, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, optionally, when the time domain density of the PTRS is 1/4, that is, L=4, if the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the preloaded DMRS is The difference H ₁ mod4=3 of the index of the last symbol carrying the pre-loaded DMRS is mapped to the PTRS on the symbol with the index l _DM-RS +3. Optionally, starting from a symbol with an index of l _DM-RS +3, the PTRS may uniformly map the symbols after the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=3, and the index is l ₀ -3 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -3, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

In the third embodiment, the index l of the symbol carrying the PT-RS can be expressed by the following formula:

or,

Wherein, l 'is a positive integer, l' = 0,1,2, ...; L represents the reciprocal of the time domain symbol-level density of PTRS; H ₁ represents the number of symbols after the second symbol; represents H2 of the first difference; l ₀ indicates the index of the first symbol carrying the pre-loaded DMRS, and l _DM-RS indicates the index of the last symbol of the pre-loaded DMRS.

With reference to the first aspect or the second aspect, in some optional embodiments, the mapping priority of the phase tracking reference signal (PT-RS) may be lower than at least one of the following: a physical downlink control channel (PDCCH), physical uplink control Physical uplink control channel (PUCCH), synchronize signal block (SS block), channel state information reference signal (CSI-RS), and sounding reference signal (SRS) , demodulation reference signal (DMRS), etc. That is to say, the PT-RS is not mapped on a resource that needs to map any of the above signals. In this way, by establishing a mapping priority between the PT-RS and other reference signals and physical channels, when a resource conflict occurs between the PT-RS and other reference signals and physical channels, the collision can be avoided by not mapping the PT-RS.

In a third aspect, the present application provides a signal transmission method, which is applied to a network device side, and includes: the network device sends first indication information. Here, the first indication information indicates the location of the time-frequency resource occupied by the at least two groups of the first reference signals, and the antenna ports associated with each of the at least two groups of the first reference signals are not quasi-co-located. Then, the network device sends a data signal, and the data signal is not mapped on the time-frequency resources occupied by the at least two sets of first reference signals.

In a fourth aspect, the present application provides a signal transmission method, which is applied to a terminal device side, where the method includes: the terminal device receives the first indication information, where the first indication information indicates the time-frequency resources occupied by the at least two groups of the first reference signals. Position, the antenna ports associated with each of the at least two sets of first reference signals are not quasi-co-located. Then, the terminal device determines, according to the first indication information, time-frequency resources occupied by at least two groups of first reference signals. The terminal device receives the data signal, and the data signal is not mapped on the time-frequency resource occupied by the at least two groups of the first reference signals.

Implementing the signal transmission method described in the third aspect and the fourth aspect, in the non-coherent joint transmission (NCJT) scenario, the data may be transmitted on the resources of the PTRS transmitted by other transmission points (TRP) Rate matching (that is, no mapping of data) can avoid interference caused by data transmitted by different transmission points to PTRS, thereby ensuring phase noise estimation performance of PTRS.

With reference to the third aspect or the fourth aspect, in some optional embodiments, the first indication information (high layer signaling, or the high layer information and the physical layer signaling jointly indicated) may include the first information and the second information, where The first information is used to determine a subcarrier occupied by the PTRS, and the second information is used to determine a symbol occupied by the PTRS. Specifically, the first information may include at least one of the following: the sending enable information of the PTRS, the indication information of the DMRS port associated with the antenna port of the PTRS in the DMRS Port group, the indication information of the DMRS port group, or the frequency domain density of the PTRS. Indicates the association relationship with the scheduling bandwidth threshold. Specifically, the second information may include indication information of a relationship between a time domain density of the PTRS and an MCS threshold.

With reference to the third aspect or the fourth aspect, in some optional embodiments, the subcarrier occupied by the first reference signal includes: a frequency domain density corresponding to a maximum scheduling bandwidth of the third device scheduled to the fourth device Subcarriers.

With reference to the third aspect or the fourth aspect, in some optional embodiments, the symbol occupied by the first reference signal includes: the time domain density corresponding to the maximum modulation order of the third device scheduled to the fourth device Subcarriers.

In a fifth aspect, the present application provides a communication device, which may include a plurality of functional modules for respectively performing the method provided by the first aspect, or any one of the possible embodiments of the first aspect. The method provided.

In a sixth aspect, the present application provides a communication device, which may include a plurality of functional modules for respectively performing the method provided by the second aspect, or any one of the possible embodiments of the second aspect. The method provided.

In a seventh aspect, the present application provides a communication apparatus for performing the signal transmission method described in the first aspect. The terminal can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices. The memory is for storing implementation code of a signal transmission method described in the first aspect, the processor is for executing program code stored in the memory, that is, performing the method provided by the first aspect, or a possible implementation of the first aspect The method provided by any of the modes.

In an eighth aspect, the present application provides a communication apparatus for performing the signal transmission method described in the first aspect. The network device can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices. The memory is for storing implementation code of a signal transmission method described in the first aspect, the processor is for executing program code stored in the memory, that is, performing the method provided by the first aspect, or a possible implementation of the first aspect The method provided by any of the modes.

In a ninth aspect, the application provides a chip, the chip can include a processor, and one or more interfaces coupled to the processor. The processor may be configured to invoke, from a memory, a signal transmission method provided by the first aspect, or an implementation program of a signal transmission method provided by any one of the possible implementations of the first aspect, and execute the program including Instructions. The interface can be used to output processing results of the processor.

In a tenth aspect, the application provides a chip, the chip can include a processor, and one or more interfaces coupled to the processor. The processor may be configured to invoke, from a memory, a signal transmission method provided by the first aspect, or an implementation program of a signal transmission method provided by any one of the possible implementations of the first aspect, and execute the program including Instructions. The interface can be used to output processing results of the processor.

In an eleventh aspect, the application provides a network device, which may include multiple functional modules for respectively performing the method provided by the third aspect, or any one of the possible implementation manners of the third aspect. The method provided.

In a twelfth aspect, the present application provides a terminal device, which may include a plurality of functional modules for respectively performing the method provided by the fourth aspect, or any one of the possible implementation manners of the fourth aspect The method provided.

In a thirteenth aspect, the present application provides a network device for performing the signal transmission method described in the third aspect. The terminal device can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices, such as network devices. The memory is for storing implementation code of the signal transmission method described in the third aspect, the processor is configured to execute the program code stored in the memory, that is, to perform the method provided by the third aspect, or the third aspect possible implementation The method provided by any of the modes.

In a fourteenth aspect, the present application provides a terminal device for performing the signal transmission method described in the fourth aspect. The terminal device can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices, such as terminals. The memory is for storing implementation code of a signal transmission method described in the fourth aspect, the processor is configured to execute program code stored in the memory, that is, to perform the method provided by the fourth aspect, or a possible implementation of the fourth aspect The method provided by any of the modes.

In a fifteenth aspect, the application provides a chip, the chip can include a processor, and one or more interfaces coupled to the processor. The processor may be used to invoke a signal transmission method provided by the third aspect from the memory, or an implementation program of the signal transmission method provided by any one of the possible implementation manners of the third aspect, and execute the program including Instructions. The interface can be used to output processing results of the processor.

In a sixteenth aspect, the application provides a chip, the chip can include a processor, and one or more interfaces coupled to the processor. The processor may be used to invoke a signal transmission method provided by the fourth aspect from the memory, or an implementation program of the signal transmission method provided by any one of the possible implementations of the fourth aspect, and execute the program including Instructions. The interface can be used to output processing results of the processor.

In a seventeenth aspect, the present application provides a wireless communication system, including a first device and a second device, where: the first device is operable to perform the signal transmission method provided by the first aspect, or the first aspect is possible a signal transmission method provided by any one of the embodiments; the second device may be configured to perform the signal transmission method provided by the second aspect, or the signal transmission provided by any one of the possible implementations of the second aspect method.

Specifically, the first device may be the communication device described in the fifth aspect or the seventh aspect, and the second device may be the communication device described in the sixth aspect or the eighth aspect.

In an eighteenth aspect, the present application provides a wireless communication system, including a terminal device and a network device, where: the terminal is operative to perform the signal transmission method provided by the third aspect, or in a possible implementation manner of the third aspect Any of the provided signal transmission methods; the network device may be used to perform the signal transmission method provided by the fourth aspect, or the signal transmission method provided by any of the possible implementations of the fourth aspect.

Specifically, the terminal device may be the network device described in the eleventh aspect or the thirteenth aspect, and the network device may be the terminal device described in the twelfth aspect or the fourteenth aspect.

A nineteenth aspect, a computer readable storage medium having stored thereon a signal transmission method for implementing the first aspect, or any one of the possible embodiments of the first aspect The program code of the signal transmission method, the program code comprising the execution of the signal transmission method provided by the first aspect, or the execution instruction of the signal transmission method provided by any of the possible implementations of the first aspect.

In a twentieth aspect, a computer readable storage medium is provided, the readable storage medium storing a signal transmission method implemented by implementing the second aspect, or any one of the possible embodiments of the second aspect A program code of a signal transmission method, the program code comprising an execution instruction of a signal transmission method provided by the operation of the signal transmission method provided by the second aspect, or any one of the possible implementations of the second aspect.

A twenty-first aspect, a computer readable storage medium storing the signal transmission method provided by the second aspect, or any one of the possible embodiments of the second aspect is provided A program code for providing a signal transmission method, the program code comprising an execution instruction of a signal transmission method provided by operating the second aspect, or a signal transmission method provided by any one of the possible implementations of the second aspect.

A twenty-second aspect, a computer readable storage medium storing the signal transmission method provided by the second aspect, or any one of the possible embodiments of the second aspect is provided A program code for providing a signal transmission method, the program code comprising an execution instruction of a signal transmission method provided by operating the second aspect, or a signal transmission method provided by any one of the possible implementations of the second aspect.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

1 is a schematic diagram of a rule for mapping a PTRS in a time domain in the prior art;

2 is a schematic diagram of mapping PDSCH on symbols before DMRS;

3 is a schematic structural diagram of a wireless communication system according to the present application;

4 is a schematic diagram of a hardware architecture of a terminal provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a hardware architecture of a network device according to an embodiment of the present application; FIG.

6 is a schematic diagram of resource mapping of a DMRS according to the present application;

7 is a schematic diagram of time-frequency resources involved in the present application;

8 is a schematic flow chart of a signal transmission method provided by the present application;

9A-9L are schematic diagrams of PTRS time domain mapping rules provided by an embodiment of the present application;

10A-10L are schematic diagrams of PTRS time domain mapping rules provided by another embodiment of the present application;

11A-11C are schematic diagrams of PTRS time domain mapping rules provided by still another embodiment of the present application;

12A-12D are schematic diagrams of PTRS time domain mapping rules provided by still another embodiment of the present application;

13 is a schematic diagram of a scenario of non-interfering joint transmission involved in the present application;

14 is a schematic flow chart of another signal transmission method provided by the present application;

15 is a schematic flow chart of still another signal transmission method provided by the present application;

16 is a functional block diagram of a related device of a wireless communication system provided by the present application;

17 is a functional block diagram of another related apparatus of the wireless communication system provided by the present application;

Figure 18 is a schematic structural view of an apparatus provided by the present application;

19 is a schematic structural view of a device provided by the present application.

detailed description

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

FIG. 3 shows a wireless communication system to which the present application relates. The wireless communication system can work in a high frequency band, is not limited to a Long Term Evolution (LTE) system, and can be a fifth generation mobile communication (5th generation, 5G) system, a new air interface (NR). System, machine to machine (Machine to Machine, M2M) system. As shown in FIG. 3, the wireless communication system 10 can include one or more network devices 101, one or more terminals 103, and a core network 115. among them:

The network device 101 can be a base station, and the base station can be used for communicating with one or more terminals, and can also be used for communicating with one or more base stations having partial terminal functions (such as a macro base station and a micro base station, such as an access point, Communication between). The base station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or may be an evolved base station in an LTE system (Evolutional Node B). , eNB), and base stations in 5G systems, new air interface (NR) systems. In addition, the base station may also be an Access Point (AP), a TransNode (Trans TRP), a Central Unit (CU), or other network entity, and may include some or all of the functions of the above network entities. .

Terminals 103 may be distributed throughout wireless communication system 100, either stationary or mobile. In some embodiments of the present application, terminal 103 may be a mobile device, a mobile station, a mobile unit, an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and the like.

In particular, network device 101 can be used to communicate with terminal 103 over one or more antennas under the control of a network device controller (not shown). In some embodiments, the network device controller may be part of the core network 115 or may be integrated into the network device 101. Specifically, the network device 101 can be configured to transmit control information or user data to the core network 115 through a blackhaul interface 113 (such as an S1 interface). Specifically, the network device 101 and the network device 101 can also communicate with each other directly or indirectly through a blackhaul interface 111 (such as an X2 interface).

The wireless communication system shown in FIG. 3 is only for the purpose of more clearly explaining the technical solutions of the present application, and does not constitute a limitation of the present application. Those skilled in the art may know that with the evolution of the network architecture and the emergence of new business scenarios, The technical solutions provided by the embodiments of the invention are equally applicable to similar technical problems. FIG. 3 shows a wireless communication system to which the present application relates. The wireless communication system can work in a high frequency band, is not limited to a Long Term Evolution (LTE) system, and can be a fifth generation mobile communication (5th generation, 5G) system, a new air interface (NR). System, machine to machine (Machine to Machine, M2M) system. As shown in FIG. 3, the wireless communication system 10 can include one or more network devices 101, one or more terminals 103, and a core network 115. among them:

The wireless communication system shown in FIG. 3 is only for the purpose of more clearly explaining the technical solution of the present application, and does not constitute a limitation of the present application. As those skilled in the art can understand, with the network architecture

Referring to Figure 4, there is shown a terminal 200 provided by some embodiments of the present application. As shown in FIG. 4, the terminal 200 may include: one or more terminal processors 201, a memory 202, a communication interface 203, a receiver 205, a transmitter 206, a coupler 207, an antenna 208, a user interface 202, and an input and output module. (including audio input and output module 210, key input module 211, display 212, etc.). These components can be connected by bus 204 or other means, and FIG. 4 is exemplified by a bus connection. among them:

Communication interface 203 can be used by terminal 200 to communicate with other communication devices, such as network devices. Specifically, the network device may be the network device 300 shown in FIG. 8. Specifically, the communication interface 203 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface. Not limited to the wireless communication interface, the terminal 200 may be configured with a wired communication interface 203, such as a Local Access Network (LAN) interface.

Transmitter 206 can be used to perform transmission processing, such as signal modulation, on signals output by terminal processor 201. Receiver 205 can be used to perform reception processing, such as signal demodulation, on the mobile communication signals received by antenna 208. In some embodiments of the present application, transmitter 206 and receiver 205 can be viewed as a wireless modem. In the terminal 200, the number of the transmitter 206 and the receiver 205 may each be one or more. The antenna 208 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. The coupler 207 is configured to divide the mobile communication signal received by the antenna 208 into multiple channels and distribute it to a plurality of receivers 205.

In addition to the transmitter 206 and receiver 205 shown in FIG. 4, the terminal 200 may also include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like. Not limited to the above-described wireless communication signals, the terminal 200 can also support other wireless communication signals such as satellite signals, short-wave signals, and the like. Not limited to wireless communication, the terminal 200 may also be configured with a wired network interface (such as a LAN interface) to support wired communication.

The input and output module can be used to implement the interaction between the terminal 200 and the user/external environment, and can include the audio input and output module 210, the key input module 211, the display 212, and the like. Specifically, the input and output module may further include: a camera, a touch screen, a sensor, and the like. The input and output modules communicate with the terminal processor 201 through the user interface 209.

Memory 202 is coupled to terminal processor 201 for storing various software programs and/or sets of instructions. In particular, memory 202 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory 202 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX. The memory 202 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices. The memory 202 can also store a user interface program, which can realistically display the content of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .

In some embodiments of the present application, the memory 202 can be used to store an implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 200 side. For implementation of the resource mapping method provided by one or more embodiments of the present application, please refer to the subsequent embodiments.

Terminal processor 201 can be used to read and execute computer readable instructions. Specifically, the terminal processor 201 can be used to invoke a program stored in the memory 212, such as a resource mapping method provided by one or more embodiments of the present application, to implement the program on the terminal 200 side, and execute the instructions included in the program.

It can be understood that the terminal 200 can be the terminal 103 in the wireless communication system 100 shown in FIG. 5, and can be implemented as a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, and a user agent. , mobile client and more.

It should be noted that the terminal 200 shown in FIG. 4 is only one implementation of the embodiment of the present application. In an actual application, the terminal 200 may further include more or less components, which are not limited herein.

Referring to Figure 5, there is shown a network device 300 provided by some embodiments of the present application. As shown in FIG. 5, network device 300 can include one or more network device processors 301, memory 302, communication interface 303, transmitter 305, receiver 306, coupler 307, and antenna 308. These components can be connected via bus 304 or other types, and FIG. 5 is exemplified by a bus connection. among them:

Communication interface 303 can be used by network device 300 to communicate with other communication devices, such as terminal devices or other network devices. Specifically, the terminal device may be the terminal 200 shown in FIG. 5. Specifically, the communication interface 303 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface. Not limited to the wireless communication interface, the network device 300 may also be configured with a wired communication interface 303 to support wired communication. For example, the backhaul link between one network device 300 and other network devices 300 may be a wired communication connection.

Transmitter 305 can be used to perform transmission processing, such as signal modulation, on signals output by network device processor 301. Receiver 306 can be used to perform reception processing on the mobile communication signals received by antenna 308. For example, signal demodulation. In some embodiments of the present application, transmitter 305 and receiver 306 can be viewed as a wireless modem. In the network device 300, the number of the transmitter 305 and the receiver 306 may each be one or more. The antenna 308 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. Coupler 307 can be used to divide the mobile pass signal into multiple channels and distribute it to multiple receivers 306.

Memory 302 is coupled to network device processor 301 for storing various software programs and/or sets of instructions. In particular, memory 302 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory 302 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux. The memory 302 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.

The network device processor 301 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and provide cell handover control and the like for users in the control area. Specifically, the network device processor 301 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM) (for Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions), code conversion and sub-multiplexer (TCSM) (for multiplexing demultiplexing and code conversion functions) )and many more.

In the embodiment of the present application, the network device processor 301 can be used to read and execute computer readable instructions. Specifically, the network device processor 301 can be used to invoke a program stored in the memory 302, such as the resource mapping method provided by one or more embodiments of the present application, on the network device 300 side, and execute the instructions included in the program. .

It can be understood that the network device 300 can be the base station 101 in the wireless communication system 100 shown in FIG. 5, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). NodeB, eNodeB, access point or TRP, etc.

It should be noted that the network device 300 shown in FIG. 5 is only one implementation of the embodiment of the present application. In actual applications, the network device 300 may further include more or fewer components, which are not limited herein.

Based on the foregoing embodiments of the wireless communication system 100, the terminal 200, and the network device 300 respectively, the present application provides a resource mapping method.

The main principle of the present application may include mapping a phase tracking reference signal (PT-RS) on a symbol of a bearer data signal before a symbol carrying a pre-loaded DMRS (DMRS). In this way, it is ensured that the data channel mapped on the symbol before the DMRS also has a PT-RS mapping, thereby ensuring phase noise estimation performance.

In the present application, a symbol carrying a preloaded DMRS may be referred to as a second symbol. The second symbol refers to a contiguous at least one symbol carrying a DMRS, the at least one symbol comprising a first symbol carrying a DMRS.

As shown in FIG. 6, the DMRS may include a front-loaded DMRS (pre-loaded DMRS) and an additional DMRS (additional-DMRS). The preloaded DMRS refers to a DMRS that continuously occupies one or more DMRS symbols with the smallest index in the DMRS symbol. The additional DMRS refers to other DMRSs other than the preloaded DMRS. Here, the DMRS symbol refers to a symbol carrying a DMRS.

For example, in the example of FIG. 6, the DMRS symbols are: symbol 3, symbol 4, and symbol 7. The symbols carrying the pre-loaded DMRS are two consecutive symbols: symbol 3 and symbol 4, where symbol 3 is the first symbol carrying the DMRS, ie the first DMRS symbol. The examples are merely illustrative of the application and should not be construed as limiting.

In this application, the mapping priority of the phase tracking reference signal (PT-RS) may be lower than at least one of the following: a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), and a synchronization signal block ( The synchronization signal block (SS block), the channel state information reference signal (CSI-RS), the sounding reference signal (SRS), the demodulation reference signal (DMRS), and the like. That is to say, the PT-RS is not mapped on a resource that needs to map any of the above signals. In this way, by establishing a mapping priority between the PT-RS and other reference signals and physical channels, when a resource conflict occurs between the PT-RS and other reference signals and physical channels, the collision can be avoided by not mapping the PT-RS.

In this application, the mapping of the PT-RS may include the following two parts:

3. The PT-RS mapping on the symbol of the bearer data signal before the second symbol (the symbol carrying the pre-loaded DMRS).

4. PT-RS mapping on the symbol of the bearer data signal following the second symbol (the symbol carrying the pre-loaded DMRS).

Here, the symbol before the second symbol refers to the symbol whose index is smaller than the index of the second symbol, and the symbol after the second symbol refers to the symbol whose index is larger than the index of the second symbol. For example, in the example of FIG. 6, the second symbol is: symbol 3 and symbol 4, the symbols before the second symbol are: symbol 0-2, and the symbols following the second symbol are: symbols 5-13. The examples are merely illustrative of the application and should not be construed as limiting.

(1) PT-RS time domain mapping rule on symbols before the second symbol

The first mapping rule, the PT-RS is mapped on the first symbol of the bearer data signal preceding the second symbol. That is to say, the PT-RS is mapped starting from the first symbol of the data channel (PUSCH/PDSCH). This ensures that the data channel on the symbol before the second symbol also has a PT-RS mapping, thereby ensuring phase noise estimation performance. This mapping method is described in detail in

subsequent embodiments

1 and 2, and will not be described here.

The second mapping rule, before the second symbol, the index of the symbol used to carry the PT-RS is related to the first difference, and the first difference (H2) is the index (l ₀ ) of the first symbol carrying the DMRS. The difference from the index of the first symbol carrying the data signal. That is, before the second symbol, the index of the symbol used to carry the PT-RS is related to the difference between the first symbol of the DMRS and the first symbol of the data channel before the second symbol. This mapping method is described in detail in the following Embodiment 3, and will not be described here.

The PT-RS may be mapped to the symbol of the bearer data signal before the second symbol in other manners, which is not limited in this application.

(2) PT-RS time domain mapping rule on the symbol after the second symbol

For example, in the example of FIG. 1, if the time domain density of the PT-RS is "1", the start symbol mapped by the PT-RS is the first symbol after the second symbol, that is, the symbol 3. If the time domain density of the PT-RS is "1/2", the start symbol mapped by the PT-RS is the second symbol after the second symbol, that is, the symbol 4. If the time domain density of the PT-RS is "1/4", the start symbol mapped by the PT-RS is the first symbol after the second symbol, that is, the symbol 3. The examples are merely illustrative of the application and should not be construed as limiting. In actual applications, the mapping between the time domain density of the PT-RS, the index of the start symbol mapped by the PT-RS, and the time domain density of the PT-RS may be different, and is not limited in this application.

Specifically, the time domain density of the PT-RS may be related to at least one of a CP type, a subcarrier spacing, and a modulation order. For details, refer to the following content, and details are not described herein.

Specifically, the time domain density of the PT-RS, and the mapping relationship between the time domain density of the PT-RS and the index of the start symbol mapped by the PT-RS may be predefined by a protocol, or may be passed by the network device through a high layer letter. Order (such as RRC signaling) or PDCCH configuration.

The second mapping rule, the PTRS starts to map from the first symbol of the physical data sharing channel (PDSCH/PUSCH), and uniformly maps the time domain symbols in the time domain unit (including the second symbol, the symbol before the second symbol, and the On the symbol after the second symbol). Thus, the PT-RS is also uniformly mapped on the symbol following the second symbol. Optionally, the mapping priority of the PT-RS is lower than the PDCCH or the PUCCH or the SS block or the CSI-RS or the SRS. This mapping method will be described in detail in the following embodiments, and will not be described here.

A third mapping rule, the PT-RS is mapped on the last symbol of the bearer data signal after the second symbol, and uniformly mapped on the symbol following the second symbol in descending order of the symbol index value. This mapping method will be described in detail in the following second embodiment, and will not be described here.

A fourth mapping rule, after the second symbol, the index of the symbol used to carry the PT-RS is related to the number of symbols after the second symbol. This mapping method will be described in detail in the following third embodiment, and will not be described here.

The above four mapping methods can achieve uniform mapping of the PT-RS on the symbol after the second symbol. The PT-RS may also be mapped to the symbols following the second symbol in other manners, which is not limited in this application.

In the present application, the time domain density of the PT-RS may be the same or different before and after the second symbol.

The resources involved in the present application refer to time-frequency resources, including time domain resources and frequency domain resources, and are usually resource elements (Resource Element, RE), Resource Block (RB), symbol (symbol), and subcarrier (subcarrier). , Transmission Time Interval (TTI) is indicated. As shown in FIG. 7, the entire system resource is composed of a frequency domain and a time domain divided grid, wherein one grid represents one RE, and one RE is composed of one subcarrier on the frequency and one symbol on the time domain. One RB is composed of consecutive T (T is a positive integer) symbols in the time domain, and continuous M (M is a positive integer) subcarriers in the frequency domain. For example, in LTE, T=7, M=12.

In the present application, the index values of the symbols correspond to the timing from first to last in the order of small to large, that is, the symbols whose symbol index values are small in time series are in front of the symbols with large symbol index values. The present application does not limit the specific symbol index and timing correspondence. For example, the symbol index values may correspond to the timing from first to last in descending order.

It should be noted that the present application provides a drawing for explaining only the embodiment of the present invention. The size of the resource block in the future communication standard, the number of symbols included in the resource block, the number of subcarriers, and the like may be different. The resources mentioned in this application. The blocks are not limited to the drawings.

Based on the above inventive principles, FIG. 8 shows the overall flow of a signal transmission method provided by the present application. The following expands the description:

S101. The first device maps the first reference signal (PT-RS) on the first symbol. Referring to the foregoing inventive principles, the first symbol includes a symbol of a bearer data signal whose index is smaller than an index of the second symbol (preloaded DMRS symbol), and the second symbol refers to at least one symbol carrying a DMRS, the at least one symbol includes a bearer. The first symbol of the DMRS.

Specifically, the first device may map the PT-RS to the time domain according to the time domain density of the PT-RS and the PT-RS time domain mapping rule predefined by the protocol. For the PT-RS time domain mapping rule on the symbol before the second symbol, and the PT-RS time domain mapping rule on the symbol after the second symbol, reference may be made to the foregoing inventive principles and subsequent embodiments, and details are not described herein. .

S102. The first device sends a first reference signal (PT-RS) to the second device. Correspondingly, the second device receives the first reference signal (PT-RS) sent by the first device. Specifically, the second device may determine, according to the time domain density of the first reference signal (PT-RS), the static definition of the protocol, or the high-level signaling, configure the PT-RS time domain mapping rule, and determine to carry the first reference signal (PT). The symbol of the -RS) (ie the first symbol) and the first reference signal (PT-RS) is received on these time domain symbols.

S103. The second device performs phase tracking according to the first reference signal (PT-RS).

Specifically, the PT-RS time domain mapping rule may be statically defined by the protocol or configured by higher layer signaling. Wherein, the symbols on which the first reference signal (PT-RS) is mapped may be determined according to the time domain density of the first reference signal (PT-RS) (refer to the following first embodiment). Alternatively, the symbols on which the first reference signal (PT-RS) is mapped may be determined according to the time domain density of the first reference signal (PT-RS) and the position of the symbol carrying the pre-loaded DMRS (ie, the second symbol) (refer to Subsequent Embodiments 2 and 3).

Specifically, the time domain density of the PT-RS may be related to at least one of a CP type, a subcarrier spacing, and a modulation order (MCS), that is, the first device does not need to additionally notify the second device of the time domain density of the PT-RS. The second device determines the time domain density of the PT-RS by at least one of a CP type, a subcarrier spacing, and a modulation order (MCS). Specifically, the symbol carrying the pre-loaded DMRS can learn the location of the second symbol by using the DMRS resource pattern (the protocol defines the DMRS resource pattern used by different antenna ports), that is, the first device does not need to additionally notify the second device of the second symbol. The location of the second symbol can be determined by the second device through the antenna port of the DMRS.

In this way, under the premise that the protocol statically defines or the high-level signaling is configured with the PT-RS time domain mapping rule, the first device can determine according to other parameters (such as MCS, DMRS antenna port, etc.) without additional notification. The symbol carrying the first reference signal (PT-RS) can significantly save signaling overhead.

It should be understood that in the uplink transmission process, the first device may be a terminal device, and the second device may be a network device. In the downlink transmission process, the first device may be a network device, and the second device may be a terminal device. Optionally, the first device and the second device may both be terminal devices, and may also be network devices.

By implementing the signal transmission method shown in FIG. 8, by mapping the first reference signal (PT-RS) on the symbol before the pre-loaded DMRS, it can be ensured that the data channel mapped on the symbol before the DMRS also has a PT-RS mapping. Thereby ensuring phase noise estimation performance.

How to map a PT-RS in the time domain is described in detail below through various embodiments.

(1) Embodiment 1

In this embodiment, the PTRS mapping is carried on the first symbol of the data signal (PDSCH/PUSCH) in the time domain unit. Optionally, in the time domain unit, the PTRS maps the smallest symbol in each L symbols in the order in which the symbol index values are incremented. That is, starting from the first symbol carrying the data signal, the PT-RS can be uniformly mapped in the time domain unit. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

In this application, the time domain unit may be a time slot, or an aggregation time slot, or a subframe, or a Transmission Time Interval (TTI) or the like.

In this embodiment, the index l of the symbol carrying the PT-RS can be expressed by the following formula:

Where l' is a positive integer, l'=0, 1, 2,...;

Indicates the index of the first symbol carrying the data signal (PDSCH/PUSCH), and L represents the reciprocal of the symbol-level time domain density of the PTRS.

In this embodiment, the mapping priority of the PTRS is lower than at least one of the following: a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a synchronization signal (SS block), and a channel state information reference signal (CSI-RS). , Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), Physical Broadcast Channel (PBCH). Here, the mapping priority is lower than the PDCCH/PUCCH/SS block/CSI-RS/SRS/DMRS means that if the PTRS time-frequency domain mapping rule is used, the PDCCH/PUCCH/ needs to be mapped on the resource unit (RE) to which the PTRS needs to be mapped. These special signals, such as SS block/CSI-RS/SRS/DMRS, do not map PTRS on this resource unit. It can be understood that if these special signals are mapped on the symbol with the smallest index among every L symbols, the PTRS is not mapped on the REs that map these special signals. It can be understood that if all the subcarriers on one or more symbols of the PTRS to be mapped are mapped with these special signals according to the PTRS time domain mapping rule, the PTRS is not mapped on the one or more symbols.

Optionally, if the special signal such as PDCCH/PUCCH/SS block/CSI-RS/SRS/DMRS needs to be mapped on the resource unit (RE) of the PTRS to be mapped according to the PTRS time-frequency domain mapping rule, the resource unit is Send zero-power PTRS (ZP-PTRS) or send silent PTRS (Muted-PTRS).

The following line transmission is taken as an example. FIGS. 9A-9L and FIGS. 10A-10L exemplarily show schematic diagrams of the PTRS time domain mapping rules provided by this embodiment. 9A-9L and FIG. 10A-10L exemplarily illustrate the mapping of PTRS time domain mapping rules according to the present embodiment, which are different DMRS configurations or different PDCCH configurations or different PDSCH configurations. Schematic diagram of PTRS mapping.

In the example of Figures 9A-9L, the time domain density of the PTRS is 1/2, i.e., L = 2. 9A and 9B will be described below as an example. The PTRS time domain mapping of Figures 9C-9L can be seen from the figure and will not be described here.

As shown in FIG. 9A, the preloaded DMRS is mapped on symbol 3, that is, the second symbol is symbol 3. The additional DMRS is mapped on symbol 7. The PDCCH and the PDSCH share the symbol 0-2 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. The last 5 symbols (i.e., symbols 9-13) in the time domain unit (i.e., slot) do not map PDSCH, i.e., symbols 9-13 do not carry downlink data signals. In the example of Figure 9A, within the time domain unit (i.e., time slot), the PTRS is mapped on the first symbol (i.e., symbol 0) that carries the data signal. And in the order in which the symbol indices are incremented, the PTRS map is on the symbol with the smallest index in every 2 (L=2) symbols. Finally, the PTRS is mapped on symbol 0, symbol 2, symbol 4, symbol 6, and symbol 8.

As shown in FIG. 9B, the preloaded DMRS is mapped on symbol 2, that is, the second symbol is symbol 2. The additional DMRS is mapped on symbol 7. The PDCCH and the PDSCH share the symbol 0-1 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. The last 5 symbols (i.e., symbols 9-13) in the time domain unit (i.e., slot) do not map PDSCH, i.e., symbols 9-13 do not carry downlink data signals. In the example of Figure 9B, within the time domain unit (i.e., time slot), the PT-RS is mapped on the first symbol (i.e., symbol 0) carrying the data signal. And in the order in which the symbol indices are incremented, the PT-RS maps on the symbol with the smallest index in every 2 (L=2) symbols. Finally, the PT-RS needs to be mapped on symbol 0, symbol 2, symbol 4, symbol 6 and symbol 8. Since the DMRS needs to be mapped on the symbol 2, the mapping priority of the DMRS is higher than the mapping priority of the PT-RS, and therefore, the PT-RS is not actually mapped on the symbol 2.

In the example of Figures 10A-10L, the time domain density of the PTRS is 1/4, i.e., L = 4. 10A and 10B will be described below as an example. The PTRS time domain mapping of Figures 10C-10L can be seen from the figure and will not be described here.

As shown in FIG. 10A, the preloaded DMRS is mapped on symbol 3, that is, the second symbol is symbol 3. The additional DMRS is mapped on symbol 7. The PDCCH and the PDSCH share the symbol 0-2 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. The last 5 symbols (i.e., symbols 9-13) in the time domain unit (i.e., slot) do not map PDSCH, i.e., symbols 9-13 do not carry downlink data signals. In the example of FIG. 10A, within a time domain unit (ie, a time slot), the PTRS is mapped on the first symbol (ie, symbol 0) that carries the data signal. And in the order in which the symbol index is incremented, the PTRS map is on the symbol with the smallest index among every 4 (L=4) symbols. Finally, the PTRS is mapped on symbol 0, symbol 4, and symbol 8.

As shown in FIG. 10B, the preloaded DMRS is mapped on symbol 3, that is, the second symbol is symbol 3. The additional DMRS is mapped on symbol 8. The PDCCH and the PDSCH share the symbol 0-2 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. The last 5 symbols (i.e., symbols 9-13) in the time domain unit (i.e., slot) do not map PDSCH, i.e., symbols 9-13 do not carry downlink data signals. In the example of FIG. 10B, within the time domain unit (ie, the time slot), the PT-RS is mapped on the first symbol (ie, symbol 0) carrying the data signal. And in the order in which the symbol index is incremented, the PT-RS maps on the symbol with the smallest index among every 4 (L=4) symbols. Finally, the PT-RS needs to be mapped on symbol 0, symbol 4 and symbol 8. Since the DMRS needs to be mapped on the symbol 8, the mapping priority of the DMRS is higher than the mapping priority of the PT-RS, and therefore, the PT-RS is not actually mapped on the symbol 8.

It should be noted that, FIG. 9A-9L and FIG. 10A - 10L only exemplarily show some implementation manners of this embodiment. In practical applications, resources (subcarriers and symbols) of DMRS and resources of PDCCH (subcarriers) are mapped. The sum symbol), the resources (subcarriers and symbols) that map the PDSCH, and the like may also be different and should not be construed as limiting.

As can be seen from the above, the PT-RS time domain mapping rule provided in the first embodiment maps the PTRS from the first symbol of the data channel, and ensures that the data channel before the symbol carrying the pre-loaded DMRS also has a PTRS mapping, thereby Guarantee phase noise estimation performance. Moreover, by establishing a mapping priority between a PTRS and a special signal such as a reference signal or a physical channel, when a PTRS mapping resource conflicts with a special signal such as another reference signal or a physical channel, the collision can be avoided by not mapping the PTRS.

(2) Example 2

In this embodiment, in the time domain unit, the location of the symbol carrying the PTRS may be the location of the symbol carrying the pre-loaded DMRS (ie, the second symbol), and the first symbol and finally of the bearer data signal (PDSCH/PUSCH). A symbol related. Here, the first symbol carrying the data signal refers to a symbol having the smallest index among the symbols of the bearer data signal (PDSCH/PUSCH) in the time domain unit. The last symbol carrying the data signal refers to the symbol with the largest index among the symbols of the bearer data signal (PDSCH/PUSCH) in the time domain unit.

Specifically, in the time domain unit, the PTRS may be mapped on the first symbol of the bearer data signal before the second symbol (ie, the symbol carrying the pre-loaded DMRS). Moreover, before the second symbol, in the order in which the symbol index values are incremented, the PTRS can be mapped on the symbol with the smallest index among every L symbols. That is to say, starting from the first symbol carrying the data signal, the PT-RS can be uniformly mapped on the symbol preceding the second symbol in the order in which the symbol index values are incremented. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

Specifically, in the time domain unit, the PTRS may be mapped on the last symbol of the bearer data signal after the second symbol (ie, the symbol carrying the pre-loaded DMRS). Moreover, after the second symbol, in the order in which the symbol index values are decremented, the PTRS can be mapped on the symbol with the largest index among every L symbols. That is to say, starting from the last symbol of the bearer data signal, the PT-RS can be uniformly mapped on the symbol following the second symbol in descending order of the symbol index value. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

Where l' is a positive integer, l'=0, 1, 2,...;

An index indicating the first symbol of the bearer data signal (PDSCH/PUSCH),

Indicates the index of the last symbol of the bearer data signal (PDSCH/PUSCH), and L represents the reciprocal of the symbol-level time domain density of the PTRS. Wherein, l _DM-RS indicates the last symbol of the preloaded DMRS, and l ₀ indicates the first symbol of the preloaded DMRS. For example, when DMRS is one symbol, l _DM-RS is equal to l ₀ ; when DMRS is two symbols, l _DM-RS is equal to l ₀ +1.

The following line transmission is taken as an example. FIG. 11A-11C exemplarily shows a schematic diagram of the PTRS time domain mapping rule provided by this embodiment. 11A-11C exemplarily show a PTRS mapping diagram mapped by a PTRS time domain mapping rule according to the present embodiment, in which several typical different DMRS configurations or different PDCCH configurations or different PDSCH configurations are used.

In the example of FIG. 11A, the time domain density of the PTRS is 1, that is, L=1.

As shown in FIG. 11A, the preloaded DMRS is mapped on symbol 1, that is, the second symbol is symbol 1. The PDCCH and the PDSCH share the symbol 0 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of FIG. 11A, prior to symbol 1, the PTRS is mapped on the first symbol (ie, symbol 0) that carries the data signal. After symbol 1, the PTRS is mapped on the last symbol (i.e., symbol 13) carrying the data signal, and is mapped on the symbol with the largest index among every 1 (L = 1) symbols in the order in which the symbol index is handed. Finally, the PTRS is mapped on symbol 0, symbol 2-13.

In the example of FIG. 11B, the time domain density of the PTRS is 1/2, that is, L=2.

As shown in FIG. 11B, the preloaded DMRS is mapped on symbol 1, that is, the second symbol is symbol 2. The PDCCH and the PDSCH share the symbol 0 and the symbol 1 in a frequency division multiplexing manner, that is, the symbols before the pre-loaded DMRS are carried. In the example of FIG. 11B, prior to symbol 2, the PTRS is mapped on the first symbol (ie, symbol 0) carrying the data signal. After symbol 2, the PTRS map is on the last symbol (i.e., symbol 13) carrying the data signal, and is mapped on the symbol with the largest index per 2 (L = 2) symbols in descending order of the symbol index. Finally, the PTRS is mapped on symbol 0, symbol 3, symbol 5, symbol 7, symbol 9, symbol 11, and symbol 13.

In the example of FIG. 11C, the time domain density of the PTRS is 1/4, that is, L=4.

As shown in FIG. 11C, the preloaded DMRS is mapped on symbol 1, that is, the second symbol is symbol 3. The PDCCH and the PDSCH share the symbol 0-2 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of FIG. 11C, prior to symbol 3, the PTRS is mapped on the first symbol (ie, symbol 0) that carries the data signal. After symbol 3, the PTRS is mapped on the last symbol (i.e., symbol 13) carrying the data signal, and is mapped on the symbol with the largest index among every 4 (L = 4) symbols in descending order of the symbol index. Finally, the PTRS is mapped on symbol 0, symbol 5, symbol 9 and symbol 13.

11A-11C exemplarily shows some implementation manners of the present embodiment. In practical applications, resources (subcarriers and symbols) of DMRS, resources (subcarriers and symbols) mapped to PDCCH, and mapping are mapped. The resources (subcarriers and symbols) of the PDSCH and the like may also be different and should not be construed as limiting.

Similar to the first embodiment, in this embodiment, the mapping priority of the PTRS is lower than at least one of the following: a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a synchronization signal (SS block), and a channel state information reference signal. (CSI-RS), Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), Physical Broadcast Channel (PBCH).

As can be seen from the above, the PT-RS time domain mapping rule provided in Embodiment 2 maps the PTRS from the first symbol and the last symbol of the data channel to the intermediate symbol, ensuring that the PTRS is mapped on the edge symbol of the data channel, thereby The interpolation estimation performance of the PTRS is guaranteed, and the data channel before the mapping of the pre-loaded DMRS symbol is also guaranteed to have a PTRS mapping, thereby ensuring phase noise estimation performance.

(III) Third embodiment

In this embodiment, the location of the symbol carrying the PTRS may be related to the location of the symbol carrying the pre-loaded DMRS (ie, the second symbol). Optionally, the location of the symbol carrying the PTRS is also the symbol carrying the pre-loaded DMRS (ie, the second symbol), the symbol index in the time domain unit is smaller than the number of symbols of the index of the first symbol carrying the pre-loaded DMRS, and the time domain. The intra-unit symbol index is related to the number of symbols of the index of the last symbol of the pre-loaded DMRS.

Specifically, in the time domain unit, the index of the last symbol carrying the PTRS before the second symbol is related to the first difference. Moreover, starting from the index of the last symbol carrying the PTRS, the PTRS is uniformly mapped on the symbol of the bearer data signal preceding the second symbol in descending order of the symbol index. Specifically, in the time domain unit, the index of the symbol carrying the PTRS before the second symbol is related to the first difference. Here, the first difference (H2) is the difference between the index of the first symbol carrying the pre-loaded DMRS (l ₀ ) and the index of the first symbol of the bearer data signal (PDSCH/PUSCH). Here, uniform mapping refers to uniform mapping according to PTRS time domain density 1/L. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

Specifically, in the time domain unit, the index of the first symbol carrying the PTRS after the second symbol is related to the number of symbols after the second symbol. Moreover, starting from the index of the first symbol carrying the PTRS, the PTRS is uniformly mapped on the symbol following the second symbol in the order in which the symbol index is incremented. Here, uniform mapping refers to uniform mapping according to PTRS time domain density 1/L. L is the reciprocal of the symbol-level time domain density of the PTRS, and the value of L can be determined according to the symbol-level time domain density of the PTRS, for example, the value may be {1, 2, 4}.

In the present application, the number of symbols after the second symbol can be represented by H ₁ . The first difference can be represented by H2. The index of the first symbol carrying the pre-loaded DMRS may be represented by l ₀ , and the index of the last symbol carrying the pre-loaded DMRS may be represented by l _DM-RS . In this embodiment, the position of the symbol carrying the PTRS is related to H ₁ , H ₂ . Here are some ways to map PTRS time domains:

(1) The time domain density of PTRS is 1/2, that is, L=2.

If the difference H ₁ between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is an odd number, then the index is l _DM-RS. The PTRS is mapped on the +1 symbol. Optionally, starting from a symbol with an index of l _DM-RS +1, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. If the difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is an odd number, the index is l ₀ -1 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -1, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

If the difference H ₁ between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is even, the index is l _DM-RS. PTRS is mapped on the +2 symbol. Optionally, starting from a symbol with an index of l _DM-RS +2, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. If the difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is even, the index is l ₀ -2 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -2, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

(2) The time domain density of PTRS is 1/4, that is, L=4.

If the difference H ₁ between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is an integer multiple of 4, the index is PTRS is mapped on the symbol of _DM-RS +4. Optionally, starting from a symbol with an index of l _DM-RS +4, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference H ₂ between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is an integer multiple of 4, and the index is l ₀ PTRS is mapped on the -4 symbol. Optionally, starting from a symbol with an index of l ₀ -4, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

If the difference between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is H ₁ mod4=1, then the index is l _{DM- The} PTRS is mapped on the symbol of _RS +1. Optionally, starting from a symbol with an index of l _DM-RS +4, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=2, and the index is l ₀ -1 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -1, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

If the difference between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is H ₁ mod4=2, then the index is l _{DM- The} PTRS is mapped on the symbol of _RS + 2. Optionally, starting from a symbol with an index of l _DM-RS +2, the PTRS may be uniformly mapped on the symbol following the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=2, and the index is l ₀ -2 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -2, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

If the difference between the index of the last symbol of the bearer data signal (PDSCH/PUSCH) after the pre-loaded DMRS and the index of the last symbol of the pre-loaded DMRS is H ₁ mod4=3, then the index is l _{DM- The} PTRS is mapped on the symbol of _RS + 3. Optionally, starting from a symbol with an index of l _DM-RS +3, the PTRS may uniformly map the symbols after the second symbol in an increasing order of the symbol index. The difference between the index of the first symbol of the bearer data signal (PDSCH/PUSCH) before the pre-loaded DMRS and the index of the first symbol of the pre-loaded DMRS is H ₂ mod4=3, and the index is l ₀ -3 Map the PTRS on the symbol. Optionally, starting from a symbol with an index of l ₀ -3, the PTRS may be uniformly mapped on the symbol before the second symbol in descending order of the symbol index.

or,

The following line transmission is taken as an example. FIG. 12A-12D exemplarily shows a schematic diagram of the PTRS time domain mapping rule provided by this embodiment. FIG. 12A-12D exemplarily show PTRS mappings mapped by the PTRS time domain mapping rules according to the present embodiment, which are exemplified in several typical different DMRS configurations or different PDCCH configurations or different PDSCH configurations.

In the example of Figures 12A-12B, the time domain density of the PTRS is 1/2, i.e., L = 2.

As shown in FIG. 12A, the preloaded DMRS is mapped on symbol 2, that is, the second symbol is symbol 2. The PDCCH and the PDSCH share the symbol 0-1 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of FIG. 12A, H ₁ =11 and H ₂ =2. Prior to symbol 2, the PTRS is mapped on symbol 0. After symbol 2, the PTRS is mapped on symbol 3, and in the order in which the symbol index is incremented, is mapped on the symbol with the smallest index among every 2 (L=2) symbols. Finally, the PTRS is mapped on symbol 0, symbol 3, symbol 5, symbol 7, symbol 9, symbol 11, and symbol 13.

As shown in FIG. 12B, the preloaded DMRS is mapped on symbol 3, that is, the second symbol is symbol 3. The PDCCH and the PDSCH share the symbol 0-2 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of Figure 12A, H ₁ = 10 and H ₂ = 3. Prior to symbol 3, the PTRS is mapped on symbol 2. After symbol 3, the PTRS is mapped on symbol 5 and is mapped on the lowest index of every 2 (L=2) symbols in order of increasing symbol index. Finally, the PTRS is mapped on symbol 2, symbol 5, symbol 7, symbol 9, symbol 11 and symbol 13.

In the example of Figures 12C-12D, the time domain density of the PTRS is 1/4, i.e., L = 4.

As shown in FIG. 12C, the preloaded DMRS is mapped on symbol 1, that is, the second symbol is symbol 1. The PDCCH and the PDSCH share the symbol 0 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of Figure 12C, H ₁ = 12 and H ₂ =1. Prior to symbol 1, the PTRS is mapped on symbol 0. After symbol 1, the PTRS is mapped on symbol 5 and is mapped on the lowest index of every 4 (L=4) symbols in order of increasing symbol index. Finally, the PTRS is mapped on symbol 0, symbol 5, symbol 9 and symbol 13.

As shown in FIG. 12D, the preloaded DMRS is mapped on symbol 2, that is, the second symbol is symbol 2. The PDCCH and the PDSCH share the symbol 0-1 in a frequency division multiplexing manner, that is, the symbol before the pre-loaded DMRS is carried. In the example of Figure 12D, H ₁ = 11 and H ₂ = 2. Prior to symbol 2, the PTRS is mapped on symbol 0. After symbol 2, the PTRS is mapped on symbol 5, and in the order in which the symbol index is incremented, is mapped on the symbol with the smallest index among every 4 (L=4) symbols. Finally, the PTRS is mapped on symbol 0, symbol 5, symbol 9 and symbol 13.

It should be noted that some implementations of this embodiment are only exemplarily shown in FIG. 12A-12D. In practical applications, resources (subcarriers and symbols) of DMRS, resources (subcarriers and symbols) mapped to PDCCH, and mapping are mapped. The resources (subcarriers and symbols) of the PDSCH and the like may also be different and should not be construed as limiting.

As can be seen from the above, the PT-RS time domain mapping rule provided in the first embodiment can be used to determine the location of the symbol carrying the DMRS and the location of the symbol carrying the PTRS, and the PTRS can be determined by using the time domain mapping pattern of the DMRS. The location of the symbol saves signaling overhead. In this embodiment, the PTRS is mapped on the last symbol of the data channel to ensure the interpolation estimation performance of the PTRS, and the data channel before the symbol carrying the pre-loaded DMRS is also mapped with PTRS, thereby ensuring the phase noise estimation performance. .

In some optional embodiments of the present application, one or more sets of data resource mapping indication (PDSCH-RE-MappingConfig) information is included in high layer signaling, such as RRC signaling, and the data resource mapping indication information includes data resources. Mapping information indicating information (pdsch-RE-MappingConfigId) of the information and information about the time-frequency resource location of the PTRS, and the related information may be, for example, a pattern indicating a phase tracking reference signal (PTRS pattern) and/or an antenna port of the phase tracking reference signal ( PTRS port) and so on.

A specific signaling implementation is as follows:

Based on the above signaling implementation manner, content included in one type of data resource mapping indication information in RRC signaling is shown. The data resource mapping indication information includes identification information of the data resource mapping indication information (pdsch-RE-MappingConfigId) and related information of the time-frequency resource location of the PTRS, where the related information includes PTRS ports and/or PTRS pattern; or PTRS port group . Here, PTRS ports represent antenna port information of the PTRS (for example, the antenna port information herein includes the port number of the antenna port); PTRS pattern indicates a PTRS pattern; or PTRS port group indicates information of the PTRS antenna port group. For information about the location of the time-frequency resource of the PTRS, refer to the detailed description below in this application.

Optionally, in the DCI, the DCI specifically indicates which group of data resource mapping indication information used by the RRC configuration. For example, the data resource mapping indication information configured in the RRC signaling may be indicated by the bits of the PDSCH RE Mapping and Quasi-Co-Location Indicator (PQI) in the DCI. Identification information (for example, pdsch-RE-MappingConfigId). For a specific implementation, refer to Table 1. The example in Table 1 illustrates the data resource mapping and quasi-co-location indication fields by 2 bits.

数据资源映射和准共址指示域(比特取值)Data resource mapping and quasi-co-location indication field (bit value)	描述description
0000	RRC配置的数据资源映射指示信息的标识1Identification of the data resource mapping indication information of the RRC configuration 1
0101	RRC配置的数据资源映射指示信息的标识2Identification of the data resource mapping indication information of the RRC configuration 2
1010	RRC配置的数据资源映射指示信息的标识3Identification of the data resource mapping indication information of the RRC configuration 3
1111	RRC配置的数据资源映射指示信息的标识4Identification of the data resource mapping indication information of the RRC configuration 4

Table 1

Here, the data resource mapping and the quasi-co-location indication field can also be understood as a specific implementation manner of the second indication information carried by the DCI. The second indication information, by indicating the corresponding identifier, can further determine related information of the time-frequency resource location of the phase tracking reference signal corresponding to the identifier in the RRC. For example, in the above exemplary RRC signaling, the identifier information of the data resource mapping indication information is the identifier 1, and the bit value of the data resource mapping and the quasi-co-location indication field in the DCI is “00”, and the DCI indication identifier 1 may be determined. The phase tracking information of the phase-track resource of the reference signal can further determine that the relevant information is PTRS ports ENUMERATED {7,8,9,10,11,12,13,14,spare1}, and/or PTRS pattern ENUMERATED {pattern 1,pattern 2}; or PTRS port group ENUMERATED{group number 1, group number 2, ...}.

It can be understood that the receiving end (ie, the second device) obtains the time-frequency resource location of the PTRS in the data resource mapping indication information, that is, the data is not mapped to the time-frequency resource location of the PTRS. That is, data reception is not performed at the time-frequency resource location of the PTRS.

In addition, the present application further provides another signal transmission method, which can be used to transmit data of PTRS at other transmission points (TRP) in a non-coherent joint transmission (NCJT) scenario. Rate matching (that is, no mapping of data) can avoid interference caused by data transmitted by different transmission points to PTRS, thereby ensuring phase noise estimation performance of PTRS.

First, introduce the non-coherent joint transmission scenario.

In the LTE system, the TM10 supports Coordination Multiple Point (CoMP). In CoMP, the signal may come from multiple transmission points. As shown in Figure 13, in a non-coherent transmission (NCJT) scenario, different transmission points can transmit different MIMO data to the same terminal device on the same time-frequency resource. MIMO layers.

To support coordinated multiple point (CoMP), the concept of quasi-co-located (QCL) is introduced, requiring antenna ports to meet certain QCL limits.

In CoMP communication, the signal may come from multiple transmission points (TPs) or transmission reception points (TRPs). The antenna ports in CoMP need to meet the QCL limit. Network devices may sometimes need to configure multiple sets of QCL information to notify the terminal device. For example, in the case of non-coherent joint transmission (NCJT), different transmission points (such as network devices) can upload different multiple-input multiple-output (multiple-input multiple) in the same time-frequency resource in the same carrier. -output, MIMO) MIMO layers are given to the same terminal device, therefore, demodulation reference signal (DMRS) antenna ports (sometimes called DMRS ports) and channel state information reference at the first transmission point Channel state information reference signal (CSI-RS) antenna port (sometimes called CSI-RS ports) and/or PTRS is QCL (ie, satisfying QCL relationship), DMRS antenna port and CSI- at the second transmission point The RS antenna port and/or PTRS is QCL, and the antenna port between the first transmission point and the second transmission point is non-QCL (ie, does not satisfy the QCL relationship).

The definition of QCL in this embodiment may refer to the definition in LTE, that is, the signal sent from the antenna port of the QCL will undergo the same large-scale fading, and the large-scale fading includes one or more of the following: delay extension, Doppler Le expansion, Doppler shift, average channel gain, and average delay. The definition of QCL in the embodiment of the present application can also refer to the definition of QCL in 5G. In the new wireless NR system, the definition of QCL is similar to that of the LTE system, but the airspace information is added, for example, the signal sent from the antenna port of the QCL. Will undergo the same large-scale fading, where large-scale fading includes one or more of the following parameters: delay spread, Doppler spread, Doppler shift, average channel gain, average delay, and spatial parameters. The airspace parameter may be a power angle spread spectrum such as an emission angle (AOA), a main emission angle (Dominant AoA), an average arrival angle (Average AoA), an angle of arrival (AOD), a channel correlation matrix, an angle of arrival, and an average trigger. Angle AoD, power angle spread spectrum of the departure angle, transmit channel correlation, receive channel correlation, transmit beamforming, receive beamforming, spatial channel correlation, filters, spatial filtering parameters, or spatial receive parameters, etc. One or more of one of the items.

The QCL relationship includes a channel state information-reference signal (CSI-RS) that satisfies the QCL relationship, a DMRS, and a phase tracking reference signal (PTRS) (also referred to as a phase compensation reference signal (phase). Compensation reference signal (PCRS), or phase noise reference signal (referred to as phase noise reference signal), a synchronization block (SS block) (including one or more of a synchronization signal and a broadcast channel, the synchronization signal including the primary synchronization signal PSS and / or one or more of the synchronization signals SSS), the uplink reference signal (such as the sounding reference signal, SRS, uplink DMRS).

It can be understood that if the transmission point 2 (TRP1) transmits the data on the time-frequency resource of the PTRS, the transmission point 2 (TRP2) transmits the data, and when the return link between the multiple transmission points is a non-ideal backhaul link, If the location of the PTRS between the two transmission points cannot be synchronized in time, the data transmitted by the transmission point 2 (TRP2) may interfere with the PTRS transmitted by the transmission point 1 (TRP1), thereby affecting the terminal equipment to the transmission point 1 (TRP1). Receive performance of the transmitted PTRS. Vice versa, if the transmission point 1 (TRP2) transmits data on the time-frequency resource of the transmission point 2 (TRP2) transmitting PTRS, the data transmitted by the transmission point 1 (TRP1) will be transmitted to the transmission point 2 (TRP2). PTRS creates interference.

Another signal transmission method that solves the above technical problems will be described in detail below. As shown in Figure 14, the following expansion:

1. The network device 1 and the network device 2 exchange PTRS information (ie, the aforementioned first reference signal) mapping resource set. Optionally, the network device 2 may send the PTRS information to the network device 1 by using an X2 interface, where the PTRS information is used to determine a time-frequency resource occupied by the PTRS from the network device 2, that is, a PTRS mapping resource set of the network device 2. Here, the PTRS mapping resource set of the network device 2 refers to a time-frequency resource that the network device 2 may transmit the PTRS, but the actual network device 2 may transmit the PTRS only on some resources in the set, or the actual network device 2 does not transmit the PTRS. .

Specifically, the network device 1 and the network device 2 need to notify each other of the respective PTRS resource mapping sets, for example, mutually inform each of the following parameters: the PTRS transmission enable information, and the PTRS antenna port associated with the DMRS Port group. The indication information, the indication information of the DMRS port group, the indication information of the association relationship between the frequency domain density of the PTRS and the scheduling bandwidth threshold, the indication information of the association relationship between the time domain density of the PTRS and the MCS threshold value, and the like.

Similarly, the network device 1 can also send the PTRS information to the network device 2 through the X2 interface, which is not limited in the present invention.

S201. The network device 1 (or the network device 2) sends the first indication information to the terminal device. The first indication information sent by the network device 1 (or the network device 2) is used to indicate the location of the time-frequency resources occupied by the at least two groups of PTRSs, and each group of PTRSs and other reference signals (eg, DMRS, CSI-RS, SS block, SRS) Etc.) has a set of QCL relationships, corresponding to a network device, the QCL relationship of each group of PTRS is different, that is, the PTRS group and the group are non-QCL. For example, the antenna ports in the PTRS antenna port group 1 satisfy the first QCL relationship, and the antenna ports in the PTRS antenna port group 2 satisfy the second QCL relationship, wherein the first QCL relationship is different from the second QCL relationship. The first QCL relationship may correspond to the network device 1, and the second QCL relationship may correspond to the network device 2. In the present application, the other reference signal may be referred to as a third reference signal.

Optionally, the first indication information that the network device 1 (or the network device 2) sends to the terminal device may be jointly indicated by the high layer signaling or the high layer signaling and the physical layer signaling. For example, in the high layer signaling, for example, the first indication information is RRC signaling, the RRC signaling includes at least two sets of data resource mapping indication (PDSCH-RE-MappingConfig) information, and the data resource mapping indication information includes the data resource mapping indication information. The identification information (pdsch-RE-MappingConfigId) and the information about the time-frequency resource location of the PRTS, the related information may be a DMRS pattern indicating a PTRS and/or an DMRS port of the PTRS, or a PTRS group identifier and many more.

A specific signaling implementation is as follows:

Based on the signaling implementation manner, the content included in one of the data resource mapping indication information in the RRC signaling is displayed, where the data resource mapping indication information includes the identifier information of the data resource mapping indication information (pdsch-RE-MappingConfigId) Information about the location of the time-frequency resource of the PTRS, where the relevant information includes PTRS ports and/or PTRS pattern; or PTRS port group. Here, PTRS ports indicate antenna port information of the PTRS (for example, the antenna port information herein includes the port number of the antenna port); PTRS pattern indicates the DMRS pattern; or PTRS port group indicates information of the PTRS antenna port group. For information about the location of the video resource of the PTRS, refer to the detailed description below in this application.

Optionally, the first indication information may also be physical layer signaling DCI and high layer signaling. For example, the physical layer signaling DCI specifically indicates which group of data resource mapping indication information used by the RRC configuration. For example, the identifier information (for example, pdsch-RE-MappingConfigId) of the data resource mapping indication information configured in the RRC signaling may be indicated by a bit mapped by the data resource in the DCI. For a specific implementation, refer to Table 2. The example in Table 2 illustrates the data resource mapping and quasi-co-location indication fields by 2 bits.

Table 2

For example, in the above exemplary RRC signaling, the identifier information of the data resource mapping indication information is the identifier 1, and the bit value of the data resource mapping and the quasi-co-location indication field in the DCI is “00”, and the DCI indication identifier 1 may be determined. The phase tracking information of the phase-track resource of the reference signal can further determine that the relevant information is PTRS ports ENUMERATED {7,8,9,10,11,12,13,14,spare1}, and/or PTRS pattern ENUMERATED {pattern 1,pattern 2}; or PTRS port group ENUMERATED{group number 1, group number 2, ...}.

It can be understood that the receiving end (ie, the terminal device) acquires the time-frequency resource location of at least two groups of PTRSs in the data resource mapping indication information, that is, the data is not mapped to the time-frequency resource location of the second DMRS. That is, data is not performed on the time-frequency resource location of the second DMRS.

S202. The terminal device sends the first indication information according to the network device 1 (or the network device 2), and determines the time-frequency resource location of the at least two groups of PTRSs in the resource mapping indication information, so that the data is not mapped to the second DMRS. The location of the time-frequency resource. That is, data is not performed on the time-frequency resource location of the second DMRS.

S203, the network device 1 and the network device 2 send a data signal to the terminal device, and perform rate matching on the data signal to be sent, that is, the data signal is not mapped to the time-frequency resource location of the PTRS indicated by the first indication information. In other words, the data signal is mapped to a location of other time-frequency resources than the time-frequency resource location of the PTRS indicated by the first indication information.

Optionally, the first indication information (high-level signaling, or high-level information and physical layer signaling common indication) may include first information and second information, where the first information is used to determine a subcarrier occupied by the PTRS, and second The information is used to determine the symbol occupied by the PTRS. Specifically, the first information may include at least one of the following: the sending enable information of the PTRS, the indication information of the DMRS port associated with the antenna port of the PTRS in the DMRS Port group, the indication information of the DMRS port group, or the frequency domain density of the PTRS. Indicates the association relationship with the scheduling bandwidth threshold. Specifically, the second information may include indication information of a relationship between a time domain density of the PTRS and an MCS threshold.

Optionally, the terminal device may determine, according to the first information sent by the network device 1 (or the network device 2), the subcarrier mapping set of the PTRS of the network device 1 (the network device 2), that is, the network device 1 (or the network device) 2) A collection of subcarriers that may be occupied. Optionally, the set of subcarrier mappings of the PTRS of the network device 1 (or the network device 2) may include: (all possible) subcarriers at a frequency domain density corresponding to a maximum scheduling bandwidth that the network device 1 schedules to the terminal device. For the relationship between the scheduling bandwidth and the frequency domain density, refer to the description of the PTRS frequency domain density in the following content, which will not be described here.

Optionally, the terminal device may determine, according to the second information sent by the network device 1 (or the network device 2), a symbol mapping set of the PTRS of the network device 1 (or the network device 2), that is, the network device 1 (or the network device 2) may A collection of symbols that will be occupied. Optionally, the symbol mapping set of the PTRS of the network device 1 (or the network device 2) may include: (all possible) subcarriers in the time domain density corresponding to the maximum MCS scheduled by the network device 1 to the terminal device. For the relationship between the MCS and the time domain density, reference may be made to the description of the PTRS time domain density in the following content, which will not be described here.

It should be understood that the order of execution of the various steps in the above methods may also be changed, and is not limited in this application.

Optionally, when the current transmission is non-coherent transmission (NCJT), the network device and the terminal device perform rate matching of the foregoing PTRS. For example, the number of DCIs that need to be blindly detected by the UE or the number of DCIs that need to be blindly detected may be configured by the network device through RRC signaling to determine whether the current is an NCJT transmission, and then determine whether to use the foregoing method to rate the location of the PTRS. match. For another example, whether the current NCJT transmission is currently indicated by the displayed signaling (physical layer DCI signaling or DCI signaling) determines whether the location of the PTRS is rate matched using the above method. It is also possible to implicitly determine whether the NCJT transmission is currently performed by the number of indicated QCL relationships of the DCI signaling, and further determine whether to perform rate matching on the location of the PTRS using the above method. The method for determining the NCJT is not limited in this application.

As shown in FIG. 14, the network device 1 and the network device 2 may also send second indication information to the terminal device respectively, and refer to S201A and S201B. Specifically, the second indication information sent by the network device 1 (or the network device 2) is used to indicate time-frequency resources occupied by the PTRS from the network device 1 (or the network device 2). It can be understood that the second indication information sent by the network device 1 and the network device 2 respectively can be used to indicate the location of the time-frequency resources occupied by the at least two groups of PTRS mentioned in the embodiment of FIG. 14 . The PTRS from the network device 1 and the PTRS from the network device 2 do not have a QCL relationship.

Other steps in the embodiment of FIG. 15 may be referred to the embodiment of FIG. 14 except for S201A and S201B, and details are not described herein again.

The time domain density of PTRS and the method of determining the frequency domain density will be described below.

(1) Time domain density of PT-RS

In the present application, the time domain density of the PT-RS may be related to at least one of a Cyclic Prefix (CP) type, a subcarrier spacing, and a modulation order.

Specifically, the time domain density of the PT-RS is corresponding to at least one of a CP type, a subcarrier spacing, and a modulation order. Different CP types or subcarrier spacing or modulation orders correspond to different time domain densities. Specifically, the corresponding relationship may be predefined by a protocol, or may be configured by a network device by using high layer signaling, such as RRC signaling.

According to the foregoing, the time domain density of the PT-RS may include the following: the PT-RS may be continuously mapped on each symbol of the PUSCH (or PDSCH), or may be on every two symbols of the PUSCH (or PDSCH). Once mapped, it can also be mapped once every 4 symbols of the PUSCH (or PDSCH).

In the present application, the time domain density of the PT-RS can be determined according to the subcarrier spacing and the modulation order. Specifically, for one determined subcarrier spacing value, one or more modulation order thresholds may be configured by pre-defined or higher layer signaling, and all modulation orders between adjacent two modulation order thresholds Corresponding to the same PT-RS time domain density, as shown in Table 3.

调制阶数Modulation order	时域密度 Time domain density
0<＝MCS<MCS_10<=MCS<MCS_1	00
MCS_1<＝MCS<MCS_2MCS_1<=MCS<MCS_2	1/41/4

MCS_2<＝MCS<MCS_3MCS_2<=MCS<MCS_3	1/21/2
MCS_3<＝MCSMCS_3<=MCS	11

table 3

Among them, MCS_1, MCS_2, and MCS_3 are modulation order thresholds, and "1", "1/2", and "1/4" in the time domain density refer to the three time domain densities shown in FIG. 1, respectively.

Specifically, under the determined subcarrier spacing, the time domain density of the PT-RS may be determined according to a modulation order threshold interval in which the actual modulation order MCS falls. For example, assume that Table 3 represents the modulation order threshold value at the default subcarrier spacing SCS_1=15 kHz, and if the actual modulation order MCS falls within the interval [MCS_2, MCS_3], the time domain density of the PT-RS is 1/2. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

In this application, different subcarrier spacings may correspond to different modulation order thresholds. That is to say, for different subcarrier spacings, different correspondence tables of modulation order thresholds and time domain densities can be configured.

Specifically, the respective modulation order thresholds of different subcarrier intervals may be predefined by a protocol, or may be configured by a network device by using high layer signaling (for example, RRC signaling).

In some optional embodiments, a default subcarrier spacing (denoted as SC_1), such as 15 kHz, and one or more default thresholds corresponding to the default subcarrier spacing may be configured by protocol pre-defined or higher layer signaling. (indicated as MCS'). Moreover, for other non-default subcarrier spacings, the corresponding modulation order offset value (represented as MCS_offset, which is an integer), MCS_offset+MCS=MCS', where MCS indicates other non-configuration, may be configured by protocol pre-defined or higher layer signaling. The actual modulation order at the default subcarrier spacing. At other non-default subcarrier intervals, the actual modulation order MCS plus the modulation order offset value MCS_offset may be used to determine the time domain density of the PT-RS.

For example, if Table 4 shows the modulation order threshold at the default subcarrier spacing SCS_1=15KHz, at the non-default subcarrier interval of 60Hz, if the actual modulation order MCS plus MCS_offset falls into the interval [0, MCS_1] Then, the time domain density of the PT-RS is zero. If the actual modulation order MCS plus MCS_offset falls within the interval [MCS_1, MCS_2], the time domain density of the PT-RS is 1/4. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

调制阶数Modulation order	时域密度 Time domain density
0<＝MCS’<MCS_10<=MCS’<MCS_1	00
MCS_1<＝MCS’<MCS_2MCS_1<=MCS’<MCS_2	1/41/4
MCS_2<＝MCS’<MCS_3MCS_2<=MCS’<MCS_3	1/21/2
MCS_3<＝MCS’MCS_3<=MCS’	11

Table 4

In some optional embodiments, the default subcarrier spacing (represented as SCS_1) may be configured by protocol pre-defined or higher layer signaling, and one or more default modulation order thresholds corresponding to the default subcarrier spacing. (indicated as MCS'). Moreover, for other non-default subcarrier spacings (denoted as SCS_n), the corresponding scaling factor β (0<β<1) can be configured by protocol pre-defined or higher layer signaling, and β=SCS_1/SCS_n can be defined. In other non-default subcarrier intervals, the actual modulation order MCS and the default modulation order threshold MCS' may be used to determine which default modulation order threshold interval the MCS falls in, and then the default modulation order gate is utilized. The time domain density corresponding to the limit interval is multiplied by the scaling factor β to determine the actual time domain density of the PT-RS.

For example, if Table 4 shows the modulation order threshold at the default subcarrier spacing SCS_1=60KHz, if the actual modulation order MCS falls within [MCS_2, MCS_3] at the non-default subcarrier spacing of 120 Hz, then PT The actual time domain density of the -RS is the time domain density closest to the product of the time domain density "1/2" and the scaling factor β. Since β = 60 / 120 = 1/2, the actual time domain density of the PT-RS is 1/4. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

In this application, for different CP types or lengths, between at least one of the subcarrier spacing and the modulation order and the time domain density of the PT-RS may be configured by protocol pre-defined or higher layer signaling (eg, RRC signaling). Correspondence relationship.

Optionally, for an Extended Cycling Prefix (ECP), the time domain density of the PT-RS may be configured by protocol pre-defined or higher layer signaling: the PT-RS is continuously mapped on each symbol of the PUSCH (or PDSCH). . In this way, PT-RS can be used to assist Doppler frequency offset estimation in a high speed and large delay spread scenario.

It should be noted that Tables 3 and 4 are only used to explain the embodiments of the present invention, and should not be construed as limiting.

(2) Frequency domain density of PT-RS

In this application, the frequency domain density of the PT-RS may be related to at least one of a CP type, the user scheduling bandwidth, a subcarrier spacing, and a modulation order. That is to say, the total number of subcarriers L _PT-RS mapped by the PT-RS in the user scheduling bandwidth may be related to at least one of a CP type, the user scheduling bandwidth, a subcarrier spacing, and a modulation order.

Specifically, the frequency domain density of the PT-RS has a corresponding relationship with at least one of a CP type, the user scheduling bandwidth, a subcarrier spacing, and a modulation order. Different CP types or the user scheduling bandwidth or subcarrier spacing or modulation order correspond to different frequency domain densities. Specifically, the corresponding relationship may be predefined by a protocol, or may be configured by a network device by using high layer signaling, such as RRC signaling.

Specifically, for one determined subcarrier interval, one or more scheduling bandwidth thresholds may be configured by using predefined or higher layer signaling, and all scheduling bandwidths between adjacent two scheduling bandwidth thresholds correspond to the same PT. -RS frequency domain density, as shown in Table 5.

调度带宽门限Scheduling bandwidth threshold	频域密度(每个资源块中的子载波个数)Frequency domain density (number of subcarriers in each resource block)
0<＝BW<BW_10<=BW<BW_1	00
BW_1<＝BW<BW_2BW_1<=BW<BW_2	11
BW_2<＝BW<BW_3BW_2<=BW<BW_3	1/21/2
BW_3<＝BW<BW_4BW_3<=BW<BW_4	1/41/4
BW_4<＝BW<BW_5BW_4<=BW<BW_5	1/81/8
BW_5<＝BWBW_5<=BW	1/161/16

table 5

The BW_1, BW_2, BW_3, BW_4, and BW_5 are the scheduling bandwidth thresholds, and the number of resource blocks included in the scheduling bandwidth of the scheduling bandwidth threshold may be represented by the frequency domain span corresponding to the scheduling bandwidth, which is not limited herein. The frequency domain density "1/2" indicates that the PT-RS occupies one subcarrier per 2 resource blocks. The meanings of the frequency domain density "1/4", "1/8", and "1/16" can be analogized and will not be described again.

Specifically, under the determined subcarrier interval, the frequency domain density of the PT-RS may be determined according to a scheduling bandwidth threshold interval in which the actual scheduling bandwidth BW falls. For example, suppose that Table 1 represents the scheduling bandwidth threshold at the default subcarrier spacing SCS_1=15 kHz. If the actual scheduling bandwidth BW falls within the interval [BW_2, BW_3], the frequency domain density of the PT-RS is 1/2. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

In this application, different subcarrier spacings may correspond to different scheduling bandwidth thresholds. That is to say, for different subcarrier spacings, different correspondence table between scheduling bandwidth threshold and time domain density can be configured.

Specifically, the scheduling bandwidth threshold corresponding to each of the different subcarrier intervals may be predefined by a protocol, or may be configured by the network device by using high layer signaling (for example, RRC signaling).

In some optional embodiments, a default subcarrier spacing (represented as SCS_1), such as 15 kHz, may be configured by protocol pre-defined or higher layer signaling, and one or more default scheduling bandwidth gates corresponding to the default subcarrier spacing. Limit (expressed as BW'). Moreover, for other non-default subcarrier spacings, the corresponding scheduling bandwidth offset value (represented as BW_offset, which is an integer), BW_offset+BW=BW', may be configured by protocol pre-defined or higher layer signaling, where BW indicates other non-default The actual scheduling bandwidth under the subcarrier spacing. At other non-default subcarrier intervals, the actual scheduling bandwidth BW plus the scheduling bandwidth offset value BW_offset may be used to determine the frequency domain density of the PT-RS.

For example, if the default subcarrier spacing SCS_1=15KHz scheduling bandwidth threshold is shown in Table 6, if the actual scheduling bandwidth BW plus BW_offset falls into the interval [BW_1, BW_2], the non-default subcarrier spacing is 60 Hz. The frequency domain density of the PT-RS is 1. If the actual modulation order BW plus BW_offset falls within the interval [BW_2, BW_3], the frequency domain density of the PT-RS is 1/2. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

调度带宽门限Scheduling bandwidth threshold	频域密度(每个资源块中的子载波个数)Frequency domain density (number of subcarriers in each resource block)
0<＝BW’<BW_10<=BW’<BW_1	00
BW_1<＝BW’<BW_2BW_1<=BW’<BW_2	11
BW_2<＝BW’<BW_3BW_2<=BW’<BW_3	1/21/2
BW_3<＝BW‘<BW_4BW_3<=BW‘<BW_4	1/41/4
BW_4<＝BW’<BW_5BW_4<=BW’<BW_5	1/81/8
BW_5<＝BW’BW_5<=BW’	1/161/16

Table 6

In some optional embodiments, a default subcarrier spacing (represented as SCS_1) may be configured by protocol pre-defined or higher layer signaling, and one or more default scheduling bandwidth thresholds corresponding to the default sub-carrier spacing ( Expressed as BW'). Moreover, for other non-default subcarrier spacings (represented as SCS_n), the corresponding scaling factor β (0<β<1) can be configured by protocol pre-defined or higher layer signaling, and β=SCS_n/SCS_1 can be defined. In other non-default subcarrier intervals, the actual scheduling bandwidth BW and the default scheduling bandwidth threshold BW' may be used to determine which default scheduling bandwidth threshold interval the BW falls in, and then the default scheduling bandwidth threshold interval is used. The frequency domain density is multiplied by the scaling factor β to determine the actual frequency domain density of the PT-RS.

For example, if Table 6 shows the modulation order threshold at the default subcarrier spacing SCS_1=60KHz, if the actual scheduling bandwidth BW falls into [BW_3, BW_4] at the non-default subcarrier spacing of 120 Hz, then PT- The actual frequency domain density of the RS is the frequency domain density closest to the product of the frequency domain density "1/4" and the scaling factor β. Since β = 120/60 = 2, the actual time domain density of the PT-RS is 1/2. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

It should be noted that Tables 5 and 6 are only used to explain the embodiments of the present invention and should not be construed as limiting.

In addition, the present application also provides another signal transmission method.

First, introduce the non-coherent joint transmission scenario.

Currently, network devices and terminal devices can communicate based on multi-antenna technology. In the process of uplink communication, the network device may configure the terminal device to send a sounding reference signal. A sounding reference signal (SRS) is a reference signal used to measure an upstream channel. The network device performs uplink channel measurement based on the SRS sent by the terminal device to obtain channel state information (CSI) of the uplink channel, so as to facilitate scheduling of uplink resources. When the uplink and downlink channels have reciprocity, the network device can also obtain the downlink CSI by measuring the SRS, that is, first obtain the uplink CSI, and then determine the downlink CSI according to the channel reciprocity.

In LTE, an SRS signal supporting a two-transmission (1T2R) terminal device is switched between different antennas. In this case, the uplink transmission of the terminal device can only be transmitted by one antenna or one port at the same time, and the downlink reception can be received by two antennas. Therefore, the network device cannot obtain the downlink 2 receiving antenna based on the single antenna SRS. Channel. In order to obtain the channels of all downlink antennas, the terminal equipment must transmit SRSs at different times on multiple antennas, that is, SRS transmission is performed by means of SRS antenna switching.

A further signal transmission method for solving the above technical problems will be described in detail below. Expand below:

Step 1: The network device sends the SRS configuration information to the terminal device. The number of antenna ports indicated in the antenna port information needs to be no greater than the number of antennas that the terminal device can simultaneously perform uplink transmission.

Optionally, the network device configures the SRS period, and the SRS period may be an absolute time, such as 1 ms, 0.5 ms, 10 ms, etc., and the network device indicates the identifier corresponding to the period by signaling. It is also possible to configure relative time, such as the number of time slots, such as 1 time slot, 2 time slots, and further, a period of less than 1, for example 0.5 time slots, can be configured to enable multiple transmissions of the SRS in one time slot.

Optionally, the terminal device needs to report the maximum number of antennas that can be sent at the same time in message three (Msg3) or higher layer signaling, such as RRC signaling. In this embodiment, the number of ports is u=2.

Optionally, the network device sends signaling to the terminal device, where the signaling is used to notify the terminal device to send the SRS in the manner of SRS antenna switching, or notify the terminal device to support the antenna selection function.

Optionally, the network device notifies the total number of antennas used by the terminal device, for example, the total number of antennas in this embodiment is v=4, and if u=2, it indicates that the terminal device transmits with two antennas at a time, for a total of four antennas. Send SRS on.

Step 2: The terminal device transmits the SRS on the v antennas according to the configuration information of the network device, and sends the SRS by using u ports or u antennas at the same time. This step takes u=2, v=4 as an example. The specific solution is as follows:

The identifier of the antenna can be recorded as a(n _SRS ), where n _SRS is determined according to the number of times the uplink reference signal is sent, or according to the frame number, subframe number, slot number, symbol number where the current SRS is located, At least one of the number of symbols of the resources of the SRS and the period of the SRS is determined, or n _SRS represents a count of the SRSs transmitted this time for a period of time. For example, n _SRS is the number of times or times the uplink reference signal is transmitted minus 1, or n _SRS is a count of the SRS time domain position in a cycle of one frame or one frame number. For example, in LTE, n _SRS is defined as:

Where N _SP is the number of downlink-to-uplink handovers in a frame, n _f is the frame number, n _s is the slot number in the frame, T _SRS is the period of the SRS, and T _{offset is} based on the symbol position and SRS in the special subframe. The number of symbols is determined, and T _{offset_max} is the maximum value of T _offest . It can be seen that the n _SRS in the calculation formula is the count of all the positions of the SRS that satisfy the SRS period in the period of 0 to 1023 of one frame number.

When no frequency hopping is performed,

a(n _SRS )=2·[n _SRS mod 2]+γ(1)

When performing frequency hopping, there are:

among them

Where K is the total number of hops for frequency hopping. Here, taking the frequency hopping scene of K=2 as an example, the following table gives the relationship between the antenna port and the number of transmissions and the bandwidth of the transmission:

n _SRS

First bandwidth of frequency hopping

Second bandwidth of frequency hopping

00	天线{0,1}Antenna {0,1}
11		天线{2,3}Antenna {2,3}
22	天线{2,3}Antenna {2,3}
33		天线{0,1}Antenna {0,1}

Table 7

It can be seen that since γ has two values, according to the calculation of (1), two simultaneously transmitted antennas can be obtained according to one n _SRS . Therefore, during the first transmission, the terminal equipment transmits the SRS with the

antennas

0 and 1 at the first frequency hopping position, and the second transmission, the terminal equipment transmits the SRS with the

antennas

2 and 3 at the second frequency hopping position, and the third In the case of secondary transmission, the terminal equipment transmits the SRS with the

antennas

2 and 3 at the first frequency hopping position, and the fourth transmission, the terminal equipment transmits the SRS with the

antennas

0 and 1 at the second frequency hopping position.

Optionally, the solution can be applied to the case where the u transmit antennas have 2u receive antennas, and (1) and (2) can be changed to be no frequency hopping:

a(n _SRS )=u·[n _SRS mod 2]+γ(3)

among them

Optionally, the solution is not limited to the correspondence between a(n _SRS ) and n _SRS in the foregoing formula, for example, an expression of a correspondence between a(n _SRS ) and n _SRS may be:

a(n _SRS )=u·f(n _SRS )+γ(5)

Where γ=0,1,...u-1,f(n _SRS ) is a function of n _SRS .

Optionally, γ and β in the scheme may have other value manners, for example, γ=0, 2, or γ=0, 2, ... 2u-2 is not limited herein, or may be configured by a network device through signaling. The value of the signaling may be RRC signaling or MAC CE signaling or DCI.

Scheme 2: The identifier of the antenna can be written as a(n _SRS ), where n _SRS can be defined in the scheme 1.

When no frequency hopping is performed,

When performing frequency hopping, there are:

among them

And get the value of a(n _SRS ) as follows

n _SRS n _SRS	跳频的第一个带宽First bandwidth of frequency hopping	跳频的第二个带宽Second bandwidth of frequency hopping
00	天线{0,1}Antenna {0,1}

11		天线{2,3}Antenna {2,3}
22	天线{2,3}Antenna {2,3}
33		天线{0,1}Antenna {0,1}

Table 8

antennas

0 and 1 at the second frequency hopping position.

Optional, the program of formula (8)

The correspondence with a(n _SRS ) can be expressed in a table or other formula, and no limitation is made here.

The corresponding relationship with a(n _SRS ) may also be a value configured by the network device through signaling, and the signaling may be RRC signaling or MAC CE signaling or DCI.

Optionally, the solution can be applied to the case where the u transmit antennas have 2u receive antennas, and (8) can be changed to:

Similarly, optional, the formula (9)

Optionally, the solution is not limited to the corresponding relationship between a(n _SRS ) and n _SRS in the above formula (6), (7).

Optional, in this scenario

It can be understood as the identification of the antenna group.

Optionally, for the foregoing solution 1 or solution 2, and other feasible solutions, the network device configures, by using SRS configuration information, multiple SRS resources for the terminal device, for example, the multiple SRS resources form one SRS resource group, where the network The device notifies the terminal device to send the SRS in the manner of SRS antenna switching, or informs the terminal device to support the antenna selection function. It can be understood as configuring the SRS resource group to transmit the SRS in an antenna switching manner.

Optionally, at least one SRS resource in the SRS resource group is used to send the SRS by using at least one different antenna. For example, all the SRS resources in the SRS resource group may use different antennas to send the SRS. Optionally, the SRS resource has a corresponding relationship with the antenna for transmitting the SRS on the SRS resource. For example, for the user of the receiving antenna of the transmitting antenna 4, one SRS resource group may include two SRS resources, and the first SRS resource corresponds to two antennas. For example,

antenna

0, 1, the second SRS resource corresponds to the other two antennas, for example,

antenna

2, 3. The time-frequency position mapped by the SRS resource can be determined according to the determination of the transmitting antenna in the SRS antenna switching transmission scheme, for example, the above scheme 1 2, for example, when it is determined that the transmitting antenna is 0, 1, the transmitted SRS belongs to the first SRS resource, such as SRS resource 0, and when it is determined that the transmitting antenna is 2, 3, the transmitted SRS belongs to another SRS resource, For example, SRS resources 1. It should be noted that since the SRS antenna switching transmission scheme can be used to determine the antenna used by the SRS, the same calculation formula can be used to determine the number of the SRS resource or the SRS resource, such as according to equation (1) ( 2) The method for determining SRS resources is:

When no frequency hopping is performed,

b(n _SRS )=n _SRS mod 2(1)

When performing frequency hopping, there are:

among them

b(n _SRS ) is an identifier or relative identifier of the SRS resource, or an identifier in the SRS resource group. It should be noted that the n _SRS is determined by the total number of times the SRS is sent on the SRS resource in the SRS resource group, or according to the frame number, the subframe number, the slot number, and the slot number of the SRS resource in the current SRS resource group. The symbol number, the number of symbols of the resources of the SRS, and the period of the SRS are determined, or the n _SRS represents a count of the SRSs currently transmitted in all the SRS resources in the SRS resource group for a period of time. For details, refer to the description in scheme 1, where the SRS is an SRS signal on all SRS resources in the SRS resource group.

In the above example, the n _SRS is not an SRS count in one of the SRS resources in the SRS resource group, but a count of SRSs on all SRS resources in the SRS resource group. Optionally, the n _SRS may also be an SRS count in one of the SRS resources in the SRS resource group, that is, the n _SRS is determined by the number of times the SRS is sent on one SRS resource in the SRS resource group, or according to the current At least one of a frame number, a subframe number, a slot number, a symbol number, a symbol number of a resource of the SRS, and a period of the SRS of one SRS resource in the SRS resource group is determined, or n _SRS indicates that the period is within a period of time The count of SRSs sent this time in one SRS resource in the SRS resource group. For details, refer to the description in scheme 1, where the SRS is an SRS signal on one SRS resource in the SRS resource group. At this time, the time domain and the frequency domain resource of the multiple SRS resources in the SRS resource group can be configured. Different SRS resources are used to measure the same frequency domain resource, and different SRS resources correspond to different antennas or antenna groups to implement SRS. Switch the transmit antenna between different SRS resources. For example, the SRS resource 0 is configured to correspond to the

antenna

0, 1, and the SRS resource 1 corresponds to the

antenna

2, 3. The SRS resource group includes SRS resource 0 and SRS resource 1, and the network device configures the SRS resource 0 and the time-frequency location of the resource 1, and indicates the SRS resource of the terminal device in the SRS resource group, or the SRS resource 0 and the SRS resource 1 Send SRS on. Thus, switching between different SRS resources is implemented to implement SRS transmission between all antennas.

Compared with the scheme in LTE, the scheme can further support antenna switching of terminal devices of u Tx (transmitting) antennas v Rx (receiving) antennas, where u>1 or v>2, and u<v.

Referring to FIG. 16, FIG. 16 illustrates a wireless communication system, a terminal, and a network device. The wireless communication system 10 includes a first device 400 and a second device 500. The first device 400 may be the terminal 200 in the embodiment of FIG. 4, and the second device 500 may be the network device 300 in the embodiment of FIG. 5 in the uplink transmission process. In the downlink transmission process, the first device 400 may be the network device 300 in the embodiment of FIG. 5, and the second device 500 may be the terminal 200 in the embodiment of FIG. The wireless communication system 10 can be the wireless communication system 100 depicted in FIG. Described separately below.

As shown in FIG. 16, the first device 400 may include a processing unit 401 and a transmitting unit 403. among them:

The processing unit 401 can be configured to map the first reference signal on the first symbol; the first reference signal is used for phase tracking. The first symbol includes a symbol of a bearer data signal before the second symbol in the time domain unit, and the second symbol refers to a first symbol that carries the demodulation reference signal in the time domain unit, or The second symbol refers to a plurality of consecutive symbols in the time domain unit, the consecutive plurality of symbols including a first symbol carrying a demodulation reference signal;

The sending unit 403 can be configured to send the first reference signal to the second device 500.

The processing unit 401 may be configured to map the PTRS according to the PTRS time domain mapping rule according to the foregoing Embodiments 1 to 3, and may refer to the foregoing Embodiment 1 to Embodiment 3, and details are not described herein again.

For a specific implementation of the various functional units included in the first device 400, reference may be made to the foregoing various embodiments, and details are not described herein again.

As shown in FIG. 16, the second device 500 may include a receiving unit 501 and a processing unit 503. among them:

The receiving unit 501 is configured to receive a first reference signal sent by the first device, where the first reference signal is used for phase tracking. The first reference signal is mapped on the first symbol, the first symbol includes a symbol of a bearer data signal before the second symbol, and the second symbol refers to a bearer demodulation reference signal in the time domain unit. The first symbol, or the second symbol, refers to a plurality of consecutive symbols in the time domain unit, the consecutive plurality of symbols including a first symbol carrying a demodulation reference signal;

The processing unit 503 is configured to perform phase tracking by using the first reference signal.

For the PTRS time domain mapping rule, refer to the foregoing Embodiment 1 to Embodiment 3, and details are not described herein again.

For a specific implementation of the various functional units included in the second device 500, reference may be made to the foregoing various embodiments, and details are not described herein again.

Referring to FIG. 17, FIG. 17 illustrates a wireless communication system, a terminal, and a network device. The wireless communication system 20 includes a network device 600 and a terminal device 700. The network device 600 may be the network device 300 in the embodiment of FIG. 5, and the terminal device 700 may be the terminal 200 in the embodiment of FIG. Wireless communication system 20 may be the wireless communication system 100 depicted in FIG. Described separately below.

As shown in FIG. 17, the network device 600 may include a processing unit 601 and a transmitting unit 603. among them:

The processing unit 601 is configured to generate first indication information, where the first indication information indicates a location of time-frequency resources occupied by at least two groups of first reference signals, and an antenna port associated with each of the at least two groups of first reference signals is not Co-located

The sending unit 603 is configured to send the first indication information.

The sending unit 603 is further configured to send a data signal, where the data signal is not mapped on a time-frequency resource occupied by the at least two sets of first reference signals.

For a specific implementation of the various functional units included in the network device 600, reference may be made to the foregoing FIG. 14 or FIG. 15 embodiment, and details are not described herein again.

As shown in FIG. 17, the terminal device 700 may include a receiving unit 701 and a processing unit 703. among them:

The receiving unit 701 is configured to receive first indication information, where the first indication information indicates a location of time-frequency resources occupied by at least two groups of first reference signals, and an antenna port associated with each of the at least two groups of first reference signals is not Co-located

The processing unit 703 is configured to determine, according to the first indication information, a time-frequency resource occupied by the at least two groups of first reference signals;

The receiving unit 701 is further configured to receive a data signal, where the data signal is not mapped on a time-frequency resource occupied by the at least two groups of first reference signals.

It can be understood that the specific implementation of each functional unit included in the terminal device 700 can be referred to the embodiment of FIG. 14 or FIG. 15 , and details are not described herein again.

Referring to FIG. 18, FIG. 18 is a schematic structural diagram of a device provided by the present application. As shown in FIG. 18, apparatus 80 can include a processor 801 and one or more interfaces 802 coupled to processor 801. Alternatively, device 80 may also include a memory 803. Alternatively, device 80 can be a chip. among them:

The processor 801 can be used to read and execute computer readable instructions. In a specific implementation, the processor 801 can mainly include a controller, an operator, and a register. Among them, the controller is mainly responsible for instruction decoding, and sends a control signal for the operation corresponding to the instruction. The operator is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logic operations, as well as performing address operations and conversions. The register is mainly responsible for saving the register operands and intermediate operation results temporarily stored during the execution of the instruction. In a specific implementation, the hardware architecture of the processor 801 may be an Application Specific Integrated Circuits (ASIC) architecture, a MIPS architecture, an ARM architecture, or an NP architecture. The processor 801 can be single core or multi-core.

The memory 803 can be used to store program code containing computer-readable instructions and can also be used to store input/output data of the processor 801.

The input/output interface 802 can be used to input data to be processed to the processor 801, and can output the processing result of the processor 801 to the outside. In a specific implementation, the interface 802 can be a General Purpose Input Output (GPIO) interface, and can be connected to multiple peripheral devices (such as a display (LCD), a camera, a radio frequency module, etc.). The interface 802 may also include a plurality of independent interfaces, such as an Ethernet interface, an LCD interface, a Camera interface, etc., responsible for communication between different peripheral devices and the processor 801, respectively.

In the present application, the processor 901 can be used to invoke the implementation program of the signal transmission method provided by the embodiment of FIG. 8 on the first device side or the implementation program of the embodiment of FIG. 14 or FIG. 15 on the network device side from the memory, and execute the program. Contained instructions. The interface 902 can be used to output the execution result of the processor 901.

It should be noted that the corresponding functions of the processor 801 and the interface 802 can be implemented by using a hardware design or a software design, and can also be implemented by a combination of software and hardware, which is not limited herein.

Referring to FIG. 19, FIG. 19 is a schematic structural diagram of a device provided by the present application. As shown in FIG. 19, apparatus 90 can include a processor 901 and one or more interfaces 902 coupled to processor 901. Optionally, the device 90 may further include a memory 903. Alternatively, device 90 can be a chip. among them:

The processor 901 can be used to read and execute computer readable instructions. In a specific implementation, the processor 901 may mainly include a controller, an operator, and a register. Among them, the controller is mainly responsible for instruction decoding, and sends a control signal for the operation corresponding to the instruction. The operator is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logic operations, as well as performing address operations and conversions. The register is mainly responsible for saving the register operands and intermediate operation results temporarily stored during the execution of the instruction. In a specific implementation, the hardware architecture of the processor 901 may be an Application Specific Integrated Circuits (ASIC) architecture or the like. The processor 901 can be single core or multi-core.

The memory 903 can be used to store program code containing computer-readable instructions and can also be used to store input/output data of the processor 901.

The input/output interface 902 can be used to input data to be processed to the processor 901, and can output the processing result of the processor 901 to the outside.

In the present application, the processor 901 can be used to call the implementation program of the signal transmission method provided by the embodiment of FIG. 8 on the second device side from the memory or the implementation program of the embodiment of FIG. 14 or FIG. 15 on the terminal device side, and execute the program. Contained instructions. The interface 902 can be used to output the execution result of the processor 901.

It should be noted that the corresponding functions of the processor 901 and the interface 902 can be implemented by using a hardware design or a software design, and can also be implemented by a combination of software and hardware, which is not limited herein.

In summary, the implementation of the technical solution provided by the present application ensures that the data channel mapped on the symbol before the DMRS also has a PT-RS mapping, thereby ensuring phase noise estimation performance.

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included. The foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

Claims

A signal transmission method, comprising:

The first device sends a first reference signal to the second device, where the first reference signal is used for phase tracking; the first reference signal is mapped on the first symbol, and the first symbol includes the second symbol in the time domain unit a symbol carrying a data signal, the second symbol refers to a first symbol carrying a demodulation reference signal in the time domain unit, or the second symbol refers to a plurality of consecutive ones in the time domain unit The symbol, the consecutive plurality of symbols comprising a first symbol carrying a demodulation reference signal.
A signal transmission method, comprising:

The second device receives a first reference signal sent by the first device, where the first reference signal is used for phase tracking; the first reference signal is mapped on the first symbol, and the first symbol includes a bearer before the second symbol a symbol of a data signal, the second symbol refers to a first symbol carrying a demodulation reference signal in the time domain unit, or the second symbol refers to a plurality of consecutive symbols in the time domain unit, The plurality of consecutive symbols includes a first symbol carrying a demodulation reference signal.
The method of claim 1 or 2, wherein the first reference signal is uniformly mapped onto the symbol preceding the second symbol, starting from the first symbol carrying the data signal.
The method according to claim 1 or 2, wherein before the second symbol, an index of a symbol for carrying the first reference signal is related to a first difference, the first difference being Equal to the difference between the index of the first symbol carrying the second reference signal and the index of the first symbol carrying the data signal.
The method according to claim 4, wherein before the second symbol, the index l of the symbol used to carry the first reference signal is:

or,

l=l 0 -[L-(-H 2 )modL]-L×l'

Where l'=0,1,2,...;

Wherein, l 0 represents an index of a first symbol carrying the second reference signal, L represents a reciprocal of the time domain density of the first reference signal, and H2 represents the first difference.
The method according to any of the claims 1-5, wherein the first reference signal is uniformly mapped on the time domain over a symbol whose index is greater than the index of the second symbol.
The method according to claim 6, wherein said first reference signal is mapped on a last symbol of a bearer data signal following said second symbol, and in a time domain in descending order of symbol index values It is evenly mapped on the symbol following the second symbol.
The method of claim 6 wherein after said second symbol, an index of a symbol used to carry said first reference signal is associated with a number of symbols following said second symbol.
The method according to claim 8, wherein after the second symbol, an index l of a symbol for carrying the first reference signal is:

or,

l=l DM-RS +[L-(-H 1 )modL]+L PT-RS ×l'

Where l'=0,1,2,...;

Wherein the DM-RS indicates an index of the last symbol carrying the second reference signal in the second symbol, L represents a reciprocal of the time domain density of the first reference signal, and H1 represents the second symbol The number of symbols.
The method according to any one of claims 1 to 9, wherein the first reference signal is mapped on a resource other than the first resource set, and the first resource set includes at least one of the following The resource of the item signal: a physical downlink control channel, a physical uplink control channel, a synchronization signal block, a channel state information reference signal, a sounding reference signal, or a demodulation reference signal.
A communication device, comprising:

a processing unit, configured to map the first reference signal on the first symbol; the first reference signal is used for phase tracking; and the first symbol includes a symbol of the bearer data signal before the second symbol in the time domain unit, where The second symbol refers to a first symbol that carries a demodulation reference signal in the time domain unit, or the second symbol refers to a plurality of consecutive symbols in the time domain unit, the consecutive multiple symbols Including a first symbol carrying a demodulation reference signal;

And a sending unit, configured to send the first reference signal to the second device.
A communication device, comprising:

a receiving unit, configured to receive a first reference signal sent by the first device, where the first reference signal is used for phase tracking; the first reference signal is mapped on the first symbol, and the first symbol is included before the second symbol a symbol carrying a data signal, the second symbol refers to a first symbol carrying a demodulation reference signal in the time domain unit, or the second symbol refers to a plurality of consecutive symbols in the time domain unit The consecutive plurality of symbols include a first symbol carrying a demodulation reference signal;

And a processing unit, configured to perform phase tracking by using the first reference signal.
A communication apparatus according to claim 11 or 12, wherein said first reference signal is uniformly mapped on a symbol preceding said second symbol starting from a first symbol carrying a data signal.
The communication apparatus according to claim 11 or 12, wherein before said second symbol, an index of a symbol for carrying said first reference signal is related to a first difference, said first difference being equal to And a difference between an index of the first symbol carrying the second reference signal and an index of the first symbol carrying the data signal.
The communication apparatus according to claim 14, wherein before said second symbol, an index l of a symbol for carrying said first reference signal is:

or,

l=l 0 -[L-(-H 2 )modL]-L×l'

Where l'=0,1,2,...;

Wherein, l 0 represents an index of a first symbol carrying the second reference signal, L represents a reciprocal of the time domain density of the first reference signal, and H2 represents the first difference.
A communication apparatus according to any one of claims 11 to 15, wherein said first reference signal is uniformly mapped on the time domain to a symbol whose index is larger than an index of said second symbol.
The communication apparatus according to claim 16, wherein said first reference signal is mapped on a last symbol of a bearer data signal subsequent to said second symbol, and is in a time domain in descending order of symbol index values Uniformly mapped on symbols following the second symbol.
The communication apparatus according to claim 16, wherein after said second symbol, an index of a symbol for carrying said first reference signal is associated with a number of symbols subsequent to said second symbol.
The communication apparatus according to claim 18, wherein after said second symbol, an index l of a symbol for carrying said first reference signal is:

or,

l=l DM-RS +[L-(-H 1 )modL]+L PT-RS ×l'

Where l'=0,1,2,...;

Wherein the DM-RS indicates an index of the last symbol carrying the second reference signal in the second symbol, L represents a reciprocal of the time domain density of the first reference signal, and H1 represents the second symbol The number of symbols.
The communication apparatus according to any one of claims 11 to 19, wherein the first reference signal is mapped on a resource other than the first resource set, and the first resource set includes at least one of the following Signal resources: physical downlink control channel, physical uplink control channel, synchronization signal block, channel state information reference signal, sounding reference signal or demodulation reference signal.
A signal transmission method, comprising:

The first indication information is sent by the network device, where the first indication information indicates the location of the time-frequency resource occupied by the at least two groups of the first reference signals, and the antenna ports associated with the at least two groups of the first reference signals are not quasi-co-located;

The network device sends a data signal, where the data signal is not mapped on a time-frequency resource occupied by the at least two groups of first reference signals.
A signal transmission method, comprising:

The terminal device receives the first indication information, where the first indication information indicates the location of the time-frequency resource occupied by the at least two groups of the first reference signals, and the antenna ports respectively associated with the at least two groups of the first reference signals are not quasi-co-located;

Determining, by the terminal device, time-frequency resources occupied by the at least two groups of first reference signals according to the first indication information;

The terminal device receives a data signal, and the data signal is not mapped on a time-frequency resource occupied by the at least two groups of first reference signals.
The method according to claim 21 or 22, wherein the first indication information comprises first information and second information, wherein the first information is used to determine a subcarrier occupied by the first reference signal The second information is used to determine a symbol occupied by the first reference signal; the first information includes at least one of: a transmission enable information of the first reference signal, an antenna of the first reference signal Indication information of a third reference signal antenna port associated with a port in a set of third reference signal antenna ports, indication information of the set of third reference signal antenna ports, or frequency domain density and scheduling of the first reference signal The indication information of the association relationship of the bandwidth threshold value; the second information includes: indication information of a relationship between a time domain density of the first reference signal and a modulation order threshold value.
The method according to claim 23, wherein the subcarriers occupied by the first reference signal comprise: subcarriers in a frequency domain density corresponding to a maximum scheduling bandwidth of the fourth device scheduled by the third device .
The method according to claim 23 or 24, wherein the symbol occupied by the first reference signal comprises: a time domain density corresponding to a maximum modulation order of the third device scheduled to the fourth device Subcarrier.
A communication device, comprising:

a processing unit, configured to generate first indication information, where the first indication information indicates a location of a time-frequency resource occupied by at least two groups of first reference signals, and an antenna port associated with each of the at least two groups of first reference signals is not a quasi-common Address

a sending unit, configured to send the first indication information;

The sending unit is further configured to send a data signal, where the data signal is not mapped on a time-frequency resource occupied by the at least two groups of first reference signals.
A communication device, comprising:

a receiving unit, configured to receive first indication information, where the first indication information indicates a location of a time-frequency resource occupied by at least two groups of first reference signals, and an antenna port associated with each of the at least two groups of first reference signals is not a quasi-common Address

a processing unit, configured to determine, according to the first indication information, a time-frequency resource occupied by the at least two groups of first reference signals;

The receiving unit is further configured to receive a data signal, where the data signal is not mapped on a time-frequency resource occupied by the at least two sets of first reference signals.
The communication device according to claim 26 or 27, wherein the first indication information comprises first information and second information, wherein the first information is used to determine a child occupied by the first reference signal The second information is used to determine a symbol occupied by the first reference signal; the first information includes at least one of: a transmission enable information of the first reference signal, and a first reference signal The indication information of the third reference signal antenna port associated with the antenna port in a set of third reference signal antenna ports, the indication information of the set of third reference signal antenna ports, or the frequency domain density of the first reference signal The indication information of the association relationship of the bandwidth threshold is scheduled; the second information includes: indication information of a relationship between a time domain density of the first reference signal and a modulation order threshold.
The communication device according to claim 28, wherein the subcarrier occupied by the first reference signal comprises: a subcarrier at a frequency domain density corresponding to a maximum scheduling bandwidth of the fourth device scheduled by the third device Carrier.
The communication device according to claim 28 or 29, wherein the symbol occupied by the first reference signal comprises: a time domain density corresponding to a maximum modulation order of the third device scheduled to the fourth device Subcarriers.