CN119233382A

CN119233382A - Communication method, device and computer readable storage medium

Info

Publication number: CN119233382A
Application number: CN202310792156.7A
Authority: CN
Inventors: 魏浩
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2024-12-31

Abstract

The embodiment of the application provides a communication method, a device and a computer readable storage medium, which relate to the technical field of communication and can enable a terminal to obtain the power gain and the shaping gain of signal transmission so as to support synchronous access. The method comprises the steps of carrying out beam scanning and transmitting synchronous broadcast SSB signals based on a group of analog weight codebooks in each beam scanning period in a plurality of beam scanning periods, wherein the group of analog weight codebooks comprises a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital precoding weights on a digital channel. The application can be used in the wireless communication process.

Description

Communication method, device and computer readable storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method, an apparatus, and a computer readable storage medium.

Background

When the base station scans the beam, the analog-digital mixed shaping is generally realized by setting a phase shifter of an analog array element and performing digital precoding on a digital channel, so that the beam is transmitted to different directions, and the transmission of a synchronization SIGNAL AND PBCH block (SSB) signal is realized, so that the terminal performs synchronous access.

Synchronous access is a communication means for achieving synchronization of data transmission and communication between a base station and a terminal. In the initial synchronous access process, channel measurement is not performed between the base station and the terminal, so that the base station cannot obtain the terminal channel information. Therefore, in this case, the signal power is low at some positions of the beam, which may cause insufficient received signal strength of the terminals at those positions, and synchronous access cannot be supported.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and a computer readable storage medium, which enable a terminal to obtain the power gain and the shaping gain of signal transmission so as to support synchronous access.

In one aspect, a communication method is provided, including:

And carrying out beam scanning and transmitting synchronous broadcast SSB signals based on a group of analog weight codebooks in each beam scanning period in a plurality of beam scanning periods, wherein the group of analog weight codebooks comprises a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital precoding weights on a digital channel.

In yet another aspect, a communication method is provided, including:

And transmitting communication information with the second node by adopting a digital precoding weight corresponding to the analog weight codebook corresponding to the target beam and the target beam scanning period, wherein the target beam is an optimal beam between the first node and the second node.

In yet another aspect, a communication device is provided that includes a transmission module.

The transmitting module is used for carrying out beam scanning and transmitting synchronous broadcast SSB signals based on a group of analog weight codebooks in each beam scanning period in a plurality of beam scanning periods, wherein the group of analog weight codebooks comprises a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital precoding weights on a digital channel.

In yet another aspect, a communication device is provided that includes a detection module.

The detection module is used for transmitting communication information with the second node by adopting a digital precoding weight corresponding to the analog weight codebook and the target beam scanning period corresponding to the target beam, wherein the target beam is an optimal beam between the first node and the second node.

In yet another aspect, a communication apparatus is provided, including a memory and a processor, the memory and the processor being coupled, the memory being configured to store a computer program, the processor implementing the communication method according to any of the embodiments described above when the computer program is executed by the processor.

In yet another aspect, a computer readable storage medium is provided, on which computer program instructions are stored, which when executed by a processor implement a communication method according to any of the above embodiments.

In yet another aspect, a computer program product is provided, comprising computer program instructions which, when executed by a processor, implement the communication method according to any of the embodiments described above.

In the communication method provided by the embodiment of the application, the first node performs beam scanning in a plurality of beam scanning periods, and each beam scanning period is provided with different digital precoding weights. Therefore, the main lobe direction of the wave beam can be adjusted, so that the main lobe direction of the wave beam can be closer to the terminal in one wave beam scanning period, namely, the wave beam is more matched with a channel of the terminal, the power gain and the shaping gain of signal transmission are brought to the terminal, the signal demodulation performance of the terminal is improved, and the success rate of synchronous access of the terminal is further improved. In addition, for one wave beam, the application adopts the transmission mode of the same analog forming weight codebook and different digital precoding weights, and the cell information and the responding wave beam serial number contained in the SSB signal transmitted by the application are kept unchanged, so that the wave beam scanning period is not changed, and the consistency of the wave beam used in the synchronous access process and the subsequent data transmission process can be ensured, thereby conforming to the specification of the current standard protocol.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are required to be used in some embodiments of the present application will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present application, and other drawings may be obtained according to these drawings to those of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a transmitting end and a receiving end in a partial connection architecture according to some embodiments of the present application;

FIG. 2 is a schematic diagram of a connection architecture of a lower portion of a different digital channel according to some embodiments of the present application;

Fig. 3 is a schematic structural diagram of a communication system according to some embodiments of the present application;

Fig. 4 is a flow chart of a communication method according to some embodiments of the present application;

FIG. 5 is a flow chart of another communication method according to some embodiments of the present application;

FIG. 6 is a schematic diagram of a plurality of beam scanning periods according to some embodiments of the present application;

FIG. 7 is a flow chart of another communication method according to some embodiments of the present application;

FIG. 8 is a flow chart of another communication method according to some embodiments of the present application;

FIG. 9 is a flow chart of another communication method according to some embodiments of the present application;

FIG. 10 is an interactive schematic diagram of a communication method according to some embodiments of the present application;

FIG. 11 is a schematic diagram illustrating a communication device according to some embodiments of the present application;

FIG. 12 is a schematic diagram illustrating another communication device according to some embodiments of the present application;

fig. 13 is a schematic diagram of a communication device according to some embodiments of the present application.

Detailed Description

The following description of the embodiments of the present application will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present application, "/" means "or" unless otherwise indicated, for example, A/B may mean A or B. The term "and/or" herein is merely an association relation describing the association object, and means that three kinds of relations may exist, for example, a and/or B may mean that a exists alone, a and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more.

For millimeter wave high-frequency band communication, a main problem faced by the millimeter wave high-frequency band communication is that the loss of electromagnetic wave propagation in space is very large, so that a large-scale antenna array is required to be deployed at a transmitting end and a receiving end to provide beamforming gain so as to resist performance loss caused by path loss. The antenna array of the high-frequency base station is different from the all-digital antenna array architecture of the low-frequency base station, and is deployed by adopting an analog-digital hybrid architecture, namely, a small number of digital channels are connected with a large number of analog antenna array elements, the digital channels are provided with complete radio frequency links (including digital-to-analog conversion, power amplifiers and the like) to carry out amplitude modulation and phase modulation processing on the received and transmitted signals, and the analog array elements are used for carrying out analog beamforming by adjusting the phase through phase shifters.

For the connection mode of the digital channel and the analog array element, a partial connection architecture is generally adopted in the industry at present, that is, each digital channel is respectively connected with one antenna subarray, each antenna subarray comprises a plurality of analog antenna array elements, and the plurality of antenna subarrays jointly form an antenna array of the base station. Compared with other connection modes, the partial connection architecture is simple to realize, has relatively low signal processing complexity and hardware cost, and has performance loss within an allowable range, so that the partial connection architecture becomes an industry mainstream deployment architecture for millimeter wave high-frequency band communication.

Fig. 1 is a schematic structural diagram of a transmitting end (e.g., a base station) and a receiving end (e.g., a terminal) in a partial connection architecture according to an embodiment of the present application. As shown in fig. 1, the transmitting end and the receiving end may include a plurality of digital channels, each digital channel is connected to one antenna sub-array, and each analog array element in one antenna sub-array is connected to the digital channel through a phase shifter. Wherein the phase shifter may adjust the phase of the signal for analog beamforming. The digital channel may include a complete radio frequency link (including digital to analog/analog conversion, power amplifier, etc.) that may perform amplitude modulation and phase modulation processing on the transception signal. Similarly, the structure of the receiving end is similar to that of the node of the transmitting end, and the receiving end comprises a plurality of digital channels and an antenna sub-array connected with each digital channel. In addition, for the transmitting end, the digital channel performs digital precoding processing at the time of transmitting the signal.

Fig. 2 is a schematic diagram of a connection structure of a lower portion of a different digital channel according to an embodiment of the present application. In fig. 2, (a) is a case where two digital channels are connected to two antenna sub-arrays, and (b) in fig. 2 is a case where four digital channels are connected to four antenna sub-arrays.

For the high-frequency base station, when the high-frequency base station transmits signals, the high-frequency base station can not only perform beam forming of the analog antenna array through the phase shifter of the analog array element, but also perform digital precoding through a digital channel, namely performing analog-digital mixed forming on the signals. The selection of the analog shaping weight can be realized through a beam scanning process of a preset analog weight codebook and terminal feedback, and the digital precoding weight can be calculated by performing channel measurement to acquire channel information after the analog beam is determined.

However, in the initial synchronous access process of the network, no channel measurement is performed between the base station and the terminal, so that the base station cannot obtain the channel information. The prior proposal is that a base station can scan wave beams based on a preset group of analog weight codebooks, send synchronous broadcast signals, the synchronous broadcast signals transmitted by different analog wave beams contain corresponding wave beam serial number information, and a terminal can measure the received signal strength of the synchronous broadcast signals, and then select wave beams with stronger signal quality to send access information to request to access the base station.

In general, the base station deploys different antenna sub-arrays, and the codebook of analog weights used in transmitting signals is the same, i.e. the different antenna sub-arrays transmit the same analog beam. Since the base station is unknown to the channel information at this time, the digital precoding weight of the digital channel is usually set to 1 (amplitude is 1, phase is 0). When the number of the digital channels with the same polarization characteristics deployed by the base station is greater than or equal to 2, the weight corresponding to each digital channel is set to 1, so that the analog beam is overlapped with the digital forming effect, the width of the analog beam is narrowed, and the signal power intensity of the beam center is improved. However, the received signal strength of the received signal is greatly reduced for the terminals in the other angular directions except for the beam center, which affects the signal demodulation performance of the terminals in the angular directions, and thus the signal cannot be resolved or the signal is erroneously resolved, and the base station cannot be synchronously accessed.

One solution in the current industry is to divide the complete synchronous broadcast signal into different parts in frequency bands, and send the part of synchronous broadcast signals in different frequency bands through different digital channels with the same polarization characteristics. Thus, only one digital channel with the same polarization characteristic on the same time-frequency resource is provided, and the form of the analog beam is not changed. However, because the channels experienced by the signals transmitted by different digital channels are different, the signals received by the terminal on the equivalent channels of different frequency bands are discontinuous, which increases the channel estimation error of the terminal and reduces the demodulation performance of the terminal signal. In addition, if a channel corresponding to a certain digital channel is poor, the quality of signals received on certain frequency bands is poor for the terminal, and the demodulation performance of the whole signal is also affected. Another solution is to use a cyclic delay diversity (CYCLIC DELAY DIVERSITY, CDD) transmission mode, that is, different delay versions of the same synchronous broadcast signal are transmitted on different digital channels, so as to increase the channel delay spread value experienced by the signal, so that the channel of the signal received by the terminal is continuous over the whole frequency band, but due to the fact that multipath is introduced into the equivalent channel by people, the signal received by the terminal experiences frequency selective fading, which may cause a significant reduction in the power of the signal received by the terminal at some positions.

In view of the foregoing, there is a need for a method that can fully utilize the power gain and the shaping gain of an antenna array on a base station, so as to improve the synchronous access performance of a terminal.

Based on this, the embodiment of the application provides a communication method, which performs multi-round beam scanning, and each round of beam scanning adopts different digital precoding weights so as to adjust the main lobe direction of the beam. Therefore, for a terminal at a certain point, the main lobe direction of a beam with one beam scanning period can be closer to the terminal, so that the signal power of the beam can support the terminal to perform signal demodulation, and synchronous access is realized.

The network architecture of the mobile communication system (including but not limited to 5G and future 6G mobile communication systems) in the embodiments of the present application may include a first node and a second node. In some examples, the first node may be a base station and the second node may be a terminal/User Equipment (UE). In other examples, the first node may be a terminal and the second node may be a base station. In yet other examples, in a base station to base station communication scenario, the first node and the second node may both be base stations. The embodiments of the present application are not limited thereto.

The following description will take a first node as a base station and a second node as a terminal as an example.

Fig. 3 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 3, the communication system includes a base station and a terminal. Wherein the base station and the terminal can be connected through a wireless network. Wherein the wireless network may be supported by a router, switch, or other device that facilitates communication between the base station and the terminal, as embodiments of the application are not limited in this respect.

In some embodiments, the base station is configured to provide wireless access services for the terminal. Specifically, one base station provides one service coverage area (also may be referred to as a cell). Terminals entering the area may communicate with the base station via wireless signals to thereby receive wireless access services provided by the base station. In addition, the service coverage area of the base station may be further divided into a near field and a far field, and the terminal may be in the near field range or the far field range.

In some embodiments, the base station may be a millimeter wave base station, an evolved base station (evolutionnodeB, eNB), a next generation base station (gNB), a transceiver point (transmission receive point, TRP), a transmission point (transmission point, TP), and some other access node. Base stations can be further classified into Macro base stations for providing Macro cells (Macro cells), micro base stations for providing micro cells (Pico cells), and Femto base stations for providing Femto cells (Femto cells), according to the size of the service coverage area provided. As wireless communication technology continues to evolve, future base stations may also be referred to by other names.

In some embodiments, the terminal may be a device with wireless transceiving functions, such as a mobile phone, a tablet computer, a wearable device, an in-vehicle device, an Augmented Reality (AR)/Virtual Reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), etc. The embodiment of the invention does not limit the specific types of the terminals.

In some embodiments, the base station may transmit signals to the terminal over the beam in a beam-forming manner.

It should be understood that fig. 3 is an exemplary block diagram, and the communication system shown in fig. 3 includes an unlimited number of devices, e.g., an unlimited number of base stations and an unlimited number of terminals. The communication system shown in fig. 3 may include other devices in addition to the devices shown in fig. 3, and is not limited thereto.

Fig. 4 is a flow chart of a communication method according to an embodiment of the present application. The communication method provided by the application can be applied to the communication system shown in fig. 3, and can be particularly applied to the first node, namely the base station in fig. 3.

As shown in fig. 4, the communication method provided by the present application specifically includes the following steps:

S401, the first node performs beam scanning and transmitting synchronous broadcast SSB signals based on a group of analog weight codebooks in each beam scanning period in a plurality of beam scanning periods.

The group of analog weight codebooks comprises a plurality of analog weight codebooks, each analog weight codebook corresponds to one wave beam, and the wave beams corresponding to the same analog weight codebook in different wave beam scanning periods adopt different digital precoding weights on a digital channel. In addition, the first node performs beam transmission by sequentially setting all the analog weight codebooks in the set of analog weight codebooks, and can be regarded as completing one beam scanning period.

In the initial stage of network access, a base station can set different analog weight codebooks in a beam scanning mode to adjust the beam direction and send synchronous broadcast signals, wherein the synchronous broadcast signals carry cell information corresponding to the base station, corresponding beam numbers and other information. The main purpose of beam scanning is that the base station informs the terminal itself of the presence so that the terminal can access the base station synchronously. And the terminal in a certain beam coverage area can analyze the synchronous broadcast signal to acquire the related information of the base station, so as to synchronously access the base station. However, as described above, in the current beam scanning process, the signal power of the beam at the non-center angle is low, and the terminals at these positions cannot realize correct demodulation of the signals due to the low received signal strength of the received synchronous broadcast signals, and cannot acquire the base station information, so that synchronous access cannot be performed.

Thus, in some embodiments, the first node may set a plurality of beam scanning periods, each beam scanning period corresponding to a different digital precoding weight. The first node can sequentially set different analog weight codebooks in each beam scanning period, and respectively launch a plurality of beams in different directions to realize beam scanning so as to send SSB signals in different directions. For the beams corresponding to the same analog weight codebook, different digital precoding weights are set in different beam scanning periods by corresponding digital channels. For example, beam 1 employs a digital precoding weight of 1 in a first round of beam scanning cycles, a digital precoding weight of 2 in a second round of beam scanning cycles, and so on.

It should be understood that different digital precoding weights are adopted in different beam scanning periods, and the beams transmitted by overlapping with the analog weights are always matched with the channels of the terminal in one beam scanning period, that is, the main lobe of the beam can be more accurately pointed to the terminal. Therefore, the terminal can obtain the power gain and the shaping gain of signal transmission, further the signal demodulation performance of the terminal is improved, and the success rate of synchronous access is improved.

In some embodiments, the digital channels include N first digital channels having the same polarization characteristics, the digital precoding weights are spatial orthogonal basis vectors having a spatial dimension N, N being a positive integer. Wherein, the space orthogonal base vector is used for representing one vector of the vectors which are perpendicular to each other in a space.

Illustratively, taking the example that the first node includes two first digital channels with horizontal polarization characteristics, the digital precoding weights, i.e. the spatial orthogonal basis vectors, belong to a 2-dimensional space, e.g. the two spatial orthogonal basis vectors are α ₁＝[1,j]^T,α₂＝[1,-j]^T, respectively. Also exemplary, taking the example that the first node comprises four first digital channels with horizontal polarization properties, the digital precoding weights, i.e. the spatial orthogonal basis vectors, belong to a 4-dimensional space, e.g. the four spatial orthogonal basis vectors are respectively α₁＝[1,j,j,-1]^T,α₂＝[1,j,-j,1]^T,α₃＝[1,-j,j,1]^T,α₄＝[1,-j,-j,-1]^T.

It should be understood that the digital precoding weight is a spatial orthogonal base vector with dimensions equal to the number of digital channels, and has spatial orthogonality and completeness, so that a beam transmitted in one beam scanning period is matched with a channel of a terminal, the received signal strength of a signal which can be received by the terminal is ensured to be enough to support the signal demodulation of the terminal, and the success rate of synchronous access of the terminal is further improved.

In some embodiments, the first node also performs signal detection after each round of beam scanning period reception in preparation for receiving an access signal from the second node. As shown in fig. 5, the communication method provided by the embodiment of the present application further executes S402 to S403 as follows.

S402, the first node receives an access signal of the second node after the target beam scanning period is ended.

The target beam scanning period is a beam scanning period in which the received signal strength of the SSB signal received by the second node satisfies the access condition among the plurality of beam scanning periods.

It should be appreciated that each beam corresponds to an access time-frequency resource, and thus after each beam scanning period is completed, the base station may reserve a period of time for signal detection on the access time-frequency resource corresponding to each beam. When the received signal strength of the SSB signal received by the second node supports signal demodulation during the target beam scanning period, the second node may send an access signal to request synchronous access, and then the first node may receive the access signal to prepare for a subsequent synchronous access procedure.

For example, fig. 6 is a schematic diagram of a plurality of beam scanning periods according to an embodiment of the present application. As shown in fig. 6, in each beam scanning period, beams 1-N (respectively corresponding to different analog weight codebooks) all use the same digital precoding weights. For example, a digital precoding 1 is used in the first beam scanning period, a digital precoding 2 is used in the second beam scanning period, and so on, and a digital precoding M is used in the mth beam scanning period. Where M is equal to the number of digital channels on the first node having the same polarization characteristics. In addition, between two consecutive beam scanning periods, there is a period of time for synchronous access and data transmission, and the first node may detect an access signal from the second node on the time-frequency resource corresponding to each beam during the period of time, so as to perform synchronous access.

S403, the first node performs synchronous access with the second node based on the digital precoding weight corresponding to the target beam scanning period and the access signal.

In some embodiments, S403 described above may be implemented as follows.

Case one

The first node comprises N first digital channels having the same polarization characteristics (e.g. horizontal polarization), N being a positive integer. Each first digital channel may receive an access signal of the second node, i.e. the access signal comprises N first sub-access signals. The above S403 may be implemented as the following steps 1a and 2a. In step 1a, the first node performs weighted combining processing on N first sub-access signals based on a conjugate transpose (which may also be referred to as a combining weight or a digital receiving weight) of a spatial orthogonal base vector corresponding to a target beam scanning period, so as to obtain first access signals. Step 2a, the first node performs synchronous access with the second node based on the first access signal.

For example, taking N as 2 as an example, and taking α ₁＝[1,j]^T as a spatial orthogonal base vector corresponding to the target beam scanning period as an example, the first node may adopt a conjugate transpose of α ₁ to respectively perform weighted combination on the two first sub-access signals to obtain a combined first access signal, and then perform a synchronous access procedure based on the first access signal.

Case two

The first node includes N first digital channels having the same polarization characteristics, and N second digital channels having the same polarization characteristics, and the polarization characteristics of the second digital channels are different from the polarization characteristics of the first digital channels (e.g., one horizontal polarization and one vertical polarization). In this case, the access signal comprises N first sub-access signals (received by the first digital channel) and N second sub-access signals (received by the second digital channel).

The above S403 may be implemented as the following steps 1b and 2b. And step 1b, carrying out weighted combination processing on the N first sub-access signals based on the conjugate transpose of the space orthogonal base vector corresponding to the target beam scanning period to obtain first access signals. And 2b, carrying out weighted combination processing on the N second sub-access signals based on the conjugate transpose of the space orthogonal base vector corresponding to the target beam scanning period to obtain second access signals. And 3b, combining the first access signal and the second access signal to obtain a third access signal. And 4b, based on the third access signal, performing synchronous access with the second node.

It should be understood that, on the time-frequency access resource corresponding to each beam scanning period, the combination weight corresponding to the beam scanning period is adopted to perform weighting and combination processing on the received signals, so that the signal combination gain can be obtained, and the detection performance of the base station on the access signals is improved.

As shown in fig. 7, the communication method provided in the embodiment of the present application further includes the following S404.

S404, the first node adopts the digital precoding weight corresponding to the analog weight codebook corresponding to the target beam and the target beam scanning period, and the communication information is transmitted with the second node.

In some embodiments, after the first node and the second node complete the synchronous access procedure, but the channel measurement is not performed yet, the first node cannot acquire the channel information of the terminal. In this case, the first node may communicate with the second node using the analog weight codebook and the digital precoding weights in the synchronous access procedure.

It should be understood that the above-mentioned analog weight codebook and digital precoding weight are determined in the synchronous access process, and are relatively matched with the channel of the terminal, so that the communication requirement can be met to a certain extent, and the signal transmission performance of the communication system is improved.

In addition, after the first node and the second node complete the synchronous access process, the first node can take the multi-round beam scanning process of the application as beam measurement in the beam management process, and the measurement result of the same beam for the second node can be subjected to average filtering in the time dimension so as to obtain the power gains of a plurality of digital channels at the first node side, thereby being beneficial to the terminal to more accurately measure the channels.

Fig. 8 is a flow chart of a communication method according to an embodiment of the present application. The communication method provided by the application can be applied to the communication system shown in fig. 3, and can be particularly applied to the second node, namely the terminal in fig. 3.

As shown in fig. 8, the communication method provided by the present application specifically includes the following steps:

S801, the second node detects SSB signals in a plurality of beam scanning periods.

The method comprises the steps of scanning a plurality of beams, wherein the plurality of beams adopt the same group of analog weight codebooks in a scanning period, one group of analog weight codebooks comprise a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital pre-coding weights on a digital channel of a first node.

In some embodiments, since the first node performs beam scanning over multiple beam scanning periods, the second node may detect SSB signals over multiple beam scanning periods. Wherein different digital precoding weights are adopted in different beam scanning periods, so that the received signal strength of the SSB signal detected by the second node in different beam scanning periods is different.

In some embodiments, when the SSB signal of a certain beam scanning period of the second node satisfies the access condition, as shown in fig. 9, the following S802-S803 may also be performed.

S802, the second node detects that the received signal strength of the SSB signal transmitted through the target beam satisfies the access condition in the target beam scanning period.

Wherein the target beam is an optimal beam between the first node and the second node.

In some embodiments, in the target beam scanning period, the received signal strength of the SSB signal received by the second node satisfies the access condition (for example, is greater than a preset threshold), and then the second node may parse the SSB signal to obtain the cell information corresponding to the first node.

S803, the second node transmits an access signal after the target beam scanning period is ended.

Wherein the access signal is for requesting synchronous access to the first node.

In some embodiments, after the target beam scanning period is finished, the second node may acquire cell information corresponding to the first node based on analyzing the SSB signal, and send an access signal to the first node to request synchronous access, so as to implement transmission of communication information between the second node and the first node.

It should be understood that, by adopting the communication method provided by the embodiment of the application, the access performance of the terminal at the beam center position is not affected too much. But for terminals which cannot realize synchronous access at other positions, the method can enable the terminals to obtain power gain and excipient gain, and improve the success rate of synchronous access.

In addition, the space orthogonal base vector is adopted as the digital precoding weight, and the space orthogonal base vector has space orthogonality and completeness, so that the digital precoding weight adopted in one beam scanning period is ensured to be matched with a channel of a terminal. In addition, in the subsequent communication process of synchronous access, the first node can also adopt the digital precoding weight determined in the synchronous access process to communicate with the terminal, so as to ensure the signal transmission performance of the communication system.

Fig. 10 is a schematic diagram of interaction between a base station and a terminal according to an embodiment of the present application. As shown in fig. 10, during the synchronous access process, during the target beam scanning period, the base station uses the digital precoding weight n to transmit the SSB signal through the analog beam m. After receiving the SSB signal and demodulating the signal, the terminal transmits an access signal on a time-frequency resource corresponding to the analog beam m of the base station. Further, the base station adopts the conjugate transpose of the digital precoding weight n as a combining weight, and performs signal detection to receive an access signal so as to realize synchronous access. After the initial information transmission process after the access is completed, the base station can transmit communication information with the terminal by adopting the analog wave beam m and the digital precoding weight n. In the channel information measurement process, the base station can issue measurement reference signals, and the terminal performs channel measurement and feeds back measurement results.

The description is given with reference to fig. 2 (a) and 10. As can be seen from fig. 2 (a), when the base station deploys two digital channels with the same polarization characteristics, the base station performs two-round beam scanning by using a spatial orthogonal basis vector with dimension of 2. For example, the first round of beam scanning adopts alpha ₁＝[1,j]^T, after the first beam scanning period is finished, beta ₁＝α₁ ^H is adopted as a combining weight value to detect signals, and if an access signal is detected, the access signals received by the two digital channels are weighted and combined based on beta ₁, and then synchronous access is performed. Similarly, the second round of beam scanning adopts alpha ₂＝[1,-j]^T, and after the second beam scanning period is finished, beta ₂＝α₂ ^H is adopted as a combining weight for signal detection. If the access signal is detected, the access signals received by the two digital channels are weighted and combined based on beta ₁, and then synchronous access is carried out.

The description is given with reference to fig. 2 (b) and fig. 10. As can be seen in fig. 2 (b), when the base station deploys four digital channels with the same polarization characteristics, the base station performs four-wheel beam scanning by using a spatial orthogonal basis vector with a dimension of 4. For example, the first round of beam scanning adopts alpha ₁＝[1,j,j,-1]^T, after the first beam scanning period is finished, beta ₁＝α₁ ^H is adopted as a combining weight value to detect signals, and if an access signal is detected, the access signals received by the four digital channels are weighted and combined based on beta ₁, and then synchronous access is performed. Similarly, for the other three beam scans, α ₂ =

And carrying out beam scanning on [1, j-j, 1] ^T、α₃＝[1,-j,j,1]^T and alpha ₄＝[1,-j,-j,-1]^T, and after each beam scanning period is finished, respectively adopting beta ₂、β₃ and beta ₄ as combining weights to carry out signal detection. Wherein, beta ₂＝α₂ ^H,β₃＝α₃ ^H,β₄＝α₄ ^H.

The description will be continued with reference to fig. 2 (b) and fig. 10. In fig. 2 (b), the upper two digital channels are digital channels having horizontal polarization characteristics, and the lower two digital channels are digital channels having vertical polarization characteristics. The base station performs two-round beam scanning using a spatial orthogonal basis vector of dimension 2. For example, α ₁＝[1,j]^T is adopted in the first round of beam scanning, after the first beam scanning period is finished, β ₁＝α₁ ^H is adopted as a combining weight to perform signal detection, if an access signal is detected, the access signals received by the upper two digital channels are weighted and combined based on β ₁ to obtain a first access signal, the access signals received by the lower two digital channels are weighted and combined based on β ₁ to obtain a second access signal, then the first access signal and the second access signal are combined to obtain a combined third access signal, and synchronous access is performed. Similarly, the second round of beam scanning employs a ₂ =

And [1, -j ] ^T, after the second beam scanning period is finished, adopting beta ₂＝α₂ ^H as a combining weight for signal detection, and not repeating the description here.

It will be appreciated that the communication device (which may be the first node or the second node) may comprise hardware structures and/or software modules for performing the functions described above. Those skilled in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional modules of the communication device according to the embodiment of the method, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one functional module. The integrated modules described above may be implemented in hardware, or in the form of software. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. The following description will take an example of dividing each function module into corresponding functions.

Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device may perform the communication method provided in the foregoing method embodiment. As shown in fig. 11, the communication apparatus includes a transmission module 1101.

The transmitting module 1101 is configured to perform beam scanning to transmit a synchronous broadcast SSB signal based on a set of analog weight codebooks in each of a plurality of beam scanning periods, where a set of analog weight codebooks includes a plurality of analog weight codebooks, each analog weight codebook corresponds to a beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods use different digital precoding weights on a digital channel.

In some embodiments, the digital channels include N first digital channels having the same polarization characteristics, the digital precoding weights are spatial orthogonal basis vectors having a spatial dimension N, and N is a positive integer.

In some embodiments, the apparatus further comprises a receiving module 1102 and a processing module 1103. The receiving module 1102 is configured to receive an access signal sent by the second node after the target beam scanning period is over, where the target beam scanning period is a beam scanning period in which the received signal strength of the SSB signal received by the second node meets an access condition. The processing module 1103 is configured to perform synchronous access with the second node based on the digital precoding weight corresponding to the target beam scanning period and the access signal.

In some embodiments, the access signal includes N first sub-access signals received by the first digital channel, and the processing module 1103 is specifically configured to perform weighted combining processing on the N first sub-access signals based on a conjugate transpose of a spatial orthogonal basis vector corresponding to the target beam scanning period, to obtain a first access signal, and perform synchronous access based on the first access signal and the second node.

In some embodiments, the first node further comprises N second digital channels having the same polarization characteristic, the polarization characteristic of the second digital channels being different from the polarization characteristic of the first digital channels, the access signal comprising N first sub-access signals received by the first digital channels and N second sub-access signals received by the second digital channels. The processing module 1103 is specifically configured to perform weighted combination processing on the N first sub-access signals based on the conjugate transpose of the spatial orthogonal base vector corresponding to the target beam scanning period to obtain a first access signal, perform weighted combination processing on the N second sub-access signals based on the conjugate transpose of the spatial orthogonal base vector corresponding to the target beam scanning period to obtain a second access signal, perform combination processing on the first access signal and the second access signal to obtain a third access signal, and perform synchronous access with the second node based on the third access signal.

In some embodiments, the processing module 1103 is further configured to transmit communication information with the second node by using a digital precoding weight corresponding to the target beam scanning period and an analog weight codebook corresponding to the target beam, where the target beam is an optimal beam between the first node and the second node.

Fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present application, where the communication device may perform the communication method according to the above embodiment of the method. As shown in fig. 12, the communication apparatus includes a detection module 1201.

The detection module 1201 is configured to detect SSB signals in a plurality of beam scanning periods, where the plurality of beam scanning periods use the same set of analog weight codebooks, one set of analog weight codebooks includes a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and beams corresponding to the same analog weight codebook in different beam scanning periods use different digital precoding weights on a digital channel of a first node.

In some embodiments, the apparatus further comprises a transmitting module 1202. The detection module 1201 is further configured to detect that the received signal strength of the SSB signal sent through the target beam satisfies the access condition in the target beam scanning period. The sending module 1202 is further configured to send an access signal after the end of the target beam scanning period, where the access signal is used to request synchronous access to the first node.

An embodiment of the present application provides a communication system, which includes a first node for executing the methods described in S400-S404, and a second node for executing the methods described in S801-S803.

In the case of implementing the functions of the above-described integrated modules in the form of hardware, the embodiment of the present application provides another possible structure of the electronic device or the communication apparatus referred to in the above-described embodiment. As shown in fig. 13, the communication device 130 includes a processor 1302, a bus 1304. Optionally, the electronic device or communication means may further comprise a memory 1301, and optionally the electronic device or communication means may further comprise a communication interface 1303.

The processor 1302 may be any of various exemplary logic blocks, modules, and circuits that implement or perform the description of various embodiments of the application. The processor 1302 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with embodiments of the application. The processor 1302 may also be a combination of computing functions, e.g., including one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

A communication interface 1303 for connecting with other devices through a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), etc.

Memory 1301, which may be, but is not limited to, read-only memory (ROM) or other type of static storage device that may store static information and instructions, random access memory (randomaccess memory, RAM) or other type of dynamic storage device that may store information and instructions, or electrically erasable programmable read-only memory (ELECTRICALLY ERASABLEPROGRAMMABLE READ-only memory, EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 1301 may exist separately from the processor 1302, and the memory 1301 may be connected to the processor 1302 by a bus 1304 for storing instructions or program code. The processor 1302, when calling and executing instructions or program code stored in the memory 1301, is capable of implementing the communication method provided by the embodiment of the present application.

In another possible implementation, the memory 1301 may also be integrated with the processor 1302.

Bus 1304, which may be an extended industry standard architecture (extended industry standardarchitecture, EISA) bus, or the like. The bus 1304 may be classified as an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 13, but not only one bus or one type of bus.

In some embodiments, memory 1301 has stored therein executable instructions that, when executed by processor 1302, cause an electronic device or communication apparatus to perform a communication method as described in any of the above embodiments.

Some embodiments of the present application provide a computer readable storage medium (e.g., a non-transitory computer readable storage medium) having stored therein computer program instructions which, when run on a computer, cause the computer to perform a communication method as described in any of the above embodiments.

By way of example, such computer-readable storage media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk (DIGITAL VERSATILE DISK, DVD), etc.), smart cards, and flash Memory devices (e.g., erasable programmable read-Only Memory (EPROM), cards, sticks, key drives, etc.). Various computer-readable storage media described herein can represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

An embodiment of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method according to any of the above embodiments.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of communication, applied to a first node, the method comprising:

The first node performs beam scanning and transmitting synchronous broadcast SSB signals based on a group of analog weight codebooks in each beam scanning period in a plurality of beam scanning periods, wherein the group of analog weight codebooks comprises a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and the beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital precoding weights on a digital channel.

2. The method of claim 1, wherein the digital channels comprise N first digital channels having the same polarization characteristics, wherein the digital precoding weights are spatial orthogonal basis vectors having a spatial dimension N, and N is a positive integer.

3. The method according to claim 2, wherein the method further comprises:

receiving an access signal sent by a second node after a target beam scanning period is finished, wherein the target beam scanning period is a beam scanning period in which the intensity of a received signal of an SSB signal received by the terminal meets an access condition in the plurality of beam scanning periods;

And based on the digital pre-coding weight corresponding to the target beam scanning period and the access signal, synchronous access is carried out with the second node.

4. A method according to claim 3, wherein the access signal comprises N first sub-access signals received by the first digital channel;

The step of synchronously accessing the access signal and the second node based on the digital pre-coding weight corresponding to the target beam scanning period comprises the following steps:

Based on the conjugate transpose of the space orthogonal base vector corresponding to the target beam scanning period, carrying out weighted combination processing on the N first sub-access signals to obtain first access signals;

and synchronous access is carried out with the second node based on the first access signal.

5. The method of claim 3, wherein the first node further comprises N second digital channels having the same polarization characteristics, wherein the polarization characteristics of the second digital channels are different from the polarization characteristics of the first digital channels;

The access signals include N first sub-access signals received by the first digital channel and N second sub-access signals received by the second digital channel;

based on the conjugate transpose of the space orthogonal base vector corresponding to the target beam scanning period, carrying out weighting and combining processing on N first sub-access signals to obtain first access signals;

based on the conjugate transpose of the space orthogonal base vector corresponding to the target beam scanning period, carrying out weighting and combining processing on N second sub-access signals to obtain second access signals;

combining the first access signal and the second access signal to obtain a third access signal;

and based on the third access signal, performing synchronous access with the second node.

6. The method according to any one of claims 3-5, further comprising:

7. A method of communication, for use with a second node, the method comprising:

the method comprises the steps of detecting SSB signals in a plurality of beam scanning periods, wherein the plurality of beam scanning periods adopt the same group of analog weight codebooks, the group of analog weight codebooks comprise a plurality of analog weight codebooks, each analog weight codebook corresponds to one beam, and beams corresponding to the same analog weight codebook in different beam scanning periods adopt different digital precoding weights on a digital channel of a first node.

8. The method of claim 7, wherein the digital channels comprise N first digital channels having the same polarization characteristics, wherein the digital precoding weights are spatial orthogonal basis vectors having a spatial dimension N, and wherein N is a positive integer.

9. The method of claim 8, wherein the method further comprises:

detecting that the received signal strength of the SSB signal transmitted through the target beam satisfies an access condition in the target beam scanning period;

and after the target beam scanning period is ended, sending an access signal, wherein the access signal is used for requesting synchronous access to the first node.

10. A communication device comprising a processor and a memory for storing instructions executable by the processor;

wherein the processor is configured to execute the instructions to cause the communication device to perform the communication method of any one of claims 1-6 or to perform the communication method of any one of claims 7-9.

11. A computer readable storage medium having stored thereon computer instructions which, when run on a communication device, cause the communication device to perform the communication method of any of claims 1-6 or to perform the communication method of any of claims 7-9.