CN107733486B - Information transmission method and device in hybrid beamforming system - Google Patents

Abstract

The present invention provides an information transmission method and device in a hybrid beamforming system, wherein the method includes: dividing a first resource granularity into K1 second resource granularities, and on the K1 second resource granularities, respectively using independent first-type beams to transmit information; and dividing the second resource granularity into K2 third resource granularities, and using independent second-type beams to transmit information on the K2 third resource granularities respectively; wherein, The resources used for transmitting the information include one or more of the first resource granularities, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1. Through the present invention, two types of different beams can be used to transmit information at the same time, which solves the problem of poor robustness of information transmission in the related art, and increases the reliability of information transmission while ensuring the coverage of information transmission.

Description

Information transmission method and device in hybrid beamforming system

technical field

The present invention relates to the field of communications, and in particular, to a method and device for information transmission in a hybrid beamforming system.

Background technique

In order to meet the increased demand for wireless data services since the deployment of 4G (4th generation) communication systems, efforts have been made to develop improved 5G (5th generation) communication systems. The 5G communication system is also called "post-4G network" or "post-LTE (Long Term Evolution, long term evolution) system".

5G communication systems are considered to be implemented in higher frequency bands (eg above 3GHz) in order to accomplish higher data rates. The characteristics of high-frequency communication are that it has relatively serious path loss and penetration loss, and the propagation in space is closely related to the atmosphere. Due to the extremely short wavelength of high-frequency signals, a large number of small antenna arrays can be used to enable beamforming technology to obtain more accurate beam directions, improve the coverage of high-frequency signals with the advantages of narrow beam technology, and make up for transmission losses. A major feature of communication.

The traditional LTE system uses baseband precoding for multi-antenna data multiplexing and transmission, which can better support multi-stream data transmission, so it can better support space division multiplexing and MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) Transmission scheme, but the disadvantage is that each transmit antenna needs to correspond to a radio frequency link, which is too expensive. Radio frequency precoding is also called radio frequency beamforming or analog beamforming. Correspondingly, baseband precoding is also called baseband digital precoding or digital precoding. Although RF precoding saves the number of RF links, the beamforming weights are only applied to single-stream transmission signals, which are then sent out through multiple antennas, thus limiting the system multiplexing capacity. In high-frequency communication systems, due to the use of large antenna arrays, in order to continue to support MIMO multi-stream transmission and effectively control the cost of radio frequency links, a feasible way is to use a hybrid beamforming structure, that is, using digital precoding and Analog beamforming for multi-antenna data multiplexing. FIG. 1 is a schematic diagram of a hybrid beamforming structure according to the related art. As shown in FIG. 1 , in the hybrid beamforming structure, one radio frequency link corresponds to one antenna array.

The MIMO transmission technology in LTE only considers digital precoding. However, in 5G or future communication systems, with the increase in the number of antennas and the increase in the communication frequency band, the beam represented by the digital precoding codeword is getting narrower and narrower. The coverage area is also relatively small, and the user's moving position may cause a great drop in performance, which means that the robustness is not very good.

For the problem of poor robustness of information transmission in the related art, no effective solution has yet been proposed.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an information transmission method and apparatus in a hybrid beamforming system, so as to at least solve the problem of poor robustness of information transmission in the related art.

According to an embodiment of the present invention, an information transmission method in a hybrid beamforming system is provided, comprising: dividing a first resource granularity into K1 second resource granularities, and on the K1 second resource granularities, respectively using independent first-type beams to transmit information; and dividing each of the second resource granularities into K2 third resource granularities, and using independent second-type beams to transmit information on the K2 third resource granularities respectively; The resources used for transmitting the information include one or more of the first resource granularities, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

Optionally, the method further includes: the first resource granularity includes one or a group of OFDM symbols in the time domain, and one or a group of subcarriers in the frequency domain; the second resource granularity includes the first resource at least one OFDM symbol in the granularity; the third resource granularity includes at least one subcarrier in the second resource granularity.

Optionally, when the first resource granularity is divided into N1*N2 first sub-resources, the method includes: dividing all the second resource granularity into N1 second sub-resources, and in the N1 different first-type beams are used respectively on the N1 second sub-resources to transmit information; and K2 third resource granularities in each of the second sub-resources are divided into N2 third sub-resources, in the N2 different beams of the second type are respectively used on the N2 third sub-resources to transmit information; wherein, N1 is a positive integer less than or equal to K1, and N2 is a positive integer less than or equal to K2.

Optionally, the method further includes: in the case where N1 first-type beams are used for transmitting information, on the i-th second resource granularity among the K1 second resource granularities in a first specified order Information is transmitted using the xth beam of the first type, where i is a positive integer less than or equal to K1, x=imodN1+1, and x is a positive integer less than or equal to N1.

Optionally, the method further includes: in the case where N2 beams of the second type are used to transmit information, on the jth third resource granularity in any one of the second resource granularities in a second specified order Information is transmitted using the yth beam of the second type, where j is a positive integer less than or equal to K2, y=jmodN2+1, and y is a positive integer less than or equal to N2.

Optionally, the method further includes: in the case where N1 groups of the second type of beams are used for transmitting information, and each group includes N2 of the second type of beams, in the first specified order, in the K1 second type of beams In the i-th second resource granularity in the resource granularity, the information is transmitted using the z2-th type-2 beam in the z1-th group on the j-th third resource granularity in the second specified order, where z1=imodN1+1, z2=jmodN2+1, z1 is a positive integer less than or equal to N1, and z2 is a positive integer less than or equal to N2.

Optionally, the first specified order is from front to back in the time domain.

Optionally, the second specified order is one of the following: frequency domain from low to high; frequency domain from high to low; first frequency domain and then time domain, and frequency domain from low to high or from low to high, when Domains are from front to back.

Optionally, the information includes information transmitted through a control channel or a data channel.

Optionally, the method further includes: configuring demodulation reference signal resources for the information, and dividing the demodulation reference signal resources into N1*N2 first demodulation reference signal sub-resources, where N1*N2 The first demodulation reference signal sub-resources have a one-to-one correspondence with the N1*N2 first sub-resources, wherein the demodulation reference signal resources are used for demodulating the information.

Optionally, the method further includes: a position of the demodulation reference signal resource in the time domain is located before the information or at a start position of the information; wherein, when the demodulation reference signal resource is located in the When the starting position of the information, the demodulation reference signal resource and the information occupy different subcarriers in the frequency domain respectively.

Optionally, the method further includes: the demodulation reference signal resources include M demodulation reference signal ports, where M is a positive integer.

Optionally, the method further includes: dividing the demodulation reference signal resource into N1 second demodulation reference signal sub-resources, and using different number of second demodulation reference signal sub-resources on the N1 second demodulation reference signal sub-resources One type of beam transmits the demodulation reference signal; each of the second demodulation reference signal sub-resources is divided into N2 third demodulation reference signal sub-resources, and the N2 third demodulation reference signal sub-resources are The demodulation reference signal is transmitted by using different beams of the second type respectively on resources.

Optionally, the method further includes: using the same first-type beam and second-type beam to transmit the demodulation reference signal on the first demodulation reference signal sub-resource and the first sub-resource with the corresponding relationship respectively signal and said information.

Optionally, the method further includes: there is a one-to-one correspondence between the N1 second demodulation reference signal sub-resources and the N1 second sub-resources, and the second demodulation reference having the corresponding relationship exists There is a one-to-one correspondence between the signal sub-resource and the N2 third demodulation reference signal sub-resources and the third sub-resource in the second sub-resource.

Optionally, the method further includes: transmitting the demodulation reference signal and the information by using the same first-type beam on the second demodulation reference signal sub-resource and the second sub-resource that have the corresponding relationship, respectively. .

Optionally, the method further includes: transmitting the demodulation reference signal and the information by using the same beam of the second type on the third demodulation reference signal sub-resource and the third sub-resource for which the corresponding relationship exists respectively. .

Optionally, the method further includes: the first resource granularity is one or more minimum scheduling time-frequency units of the system.

Optionally, the method further includes: the first resource granularity does not include resource elements other than those used for transmitting information.

Optionally, the first type of beam is characterized by a first type of beam index, and the second type of beam is characterized by a second type of beam index.

Optionally, the first type of beams are analog beams, and the second type of beams are digital precoding.

According to another embodiment of the present invention, there is also provided an information transmission apparatus in a hybrid beamforming system, including: a first transmission module, configured to divide the first resource granularity into K1 second resource granularities, and in The K1 second resource granularities respectively use independent first-type beams to transmit information; and a second transmission module, configured to divide each of the second resource granularities into K2 third resource granularities, and transmit information in the K1 second resource granularities. The K2 third resource granularities use independent second-type beams to transmit information respectively; wherein, the resources used to transmit the information include one or more of the first resource granularities, K1 and K2 are positive integers, and K1 and K2 are positive integers. / or K2 is greater than 1.

Optionally, the first resource granularity includes one or a group of OFDM symbols in the time domain and one or a group of subcarriers in the frequency domain; the second resource granularity includes at least one OFDM symbol in the first resource granularity ; the third resource granularity includes at least one subcarrier in the second resource granularity.

Optionally, the first transmission module is further configured to divide all the second resource granularities into N1 second sub-resources when the first resource granularity is divided into N1*N2 first sub-resources. resources, and use N1 different first-type beams respectively on the N1 second sub-resources to transmit information; and the second transmission module is further configured to transmit K2 third beams in each of the second sub-resources The resource granularity is divided into N2 third sub-resources, and N2 different second-type beams are used respectively on the N2 third sub-resources to transmit information; wherein, N1 is a positive integer less than or equal to K1, and N2 is less than or equal to A positive integer for K2.

Optionally, the first transmission module is further configured to, in the case where N1 first-type beams are used to transmit information, the i-th second resource in the K1 second resource granularity in a first specified order. In terms of resource granularity, the x-th first type beam is used to transmit information, where i is a positive integer less than or equal to K1, x=imodN1+1, and x is a positive integer less than or equal to N1.

Optionally, the second transmission module is further configured to, in the case where N2 beams of the second type are used to transmit information, in the second specified order, the jth third in any one of the second resource granularities. In terms of resource granularity, the yth beam of the second type is used to transmit information, where j is a positive integer less than or equal to K2, y=jmodN2+1, and y is a positive integer less than or equal to N2.

Optionally, the second transmission module is further configured to, in the case where N1 groups of the second type of beams are used to transmit information, and each group includes N2 of the second type of beams, in the first specified order, in the K1 In the i-th second resource granularity in the second resource granularity, the information is transmitted using the z2-th type-2 beam in the z1-th group on the j-th third resource granularity in the second specified order, where z1=imodN1 +1, z2=jmodN2+1, z1 is a positive integer less than or equal to N1, and z2 is a positive integer less than or equal to N2.

Optionally, the first specified order is from front to back in the time domain.

Optionally, the second specified order is one of the following: frequency domain from low to high; frequency domain from high to low; first frequency domain and then time domain, and frequency domain from low to high or from low to high, when Domains are from front to back.

Optionally, the information includes information transmitted through a control channel or a data channel.

Optionally, the apparatus further includes: a configuration module configured to configure demodulation reference signal resources for the information, and divide the demodulation reference signal resources into N1*N2 first demodulation reference signal sub-resources, The N1*N2 first demodulation reference signal sub-resources respectively have a one-to-one correspondence with the N1*N2 first sub-resources; wherein, the demodulation reference signal resources are used for demodulating the information.

Optionally, the position of the demodulation reference signal resource in the time domain is located before the information or at the start position of the information; wherein, when the demodulation reference signal resource is located at the start position of the information, The demodulation reference signal resources and the information occupy different subcarriers respectively in the frequency domain.

Optionally, the demodulation reference signal resource includes M demodulation reference signal ports, where M is a positive integer.

Optionally, the first transmission module is further configured to divide the demodulation reference signal resource into N1 second demodulation reference signal sub-resources, and use the N1 second demodulation reference signal sub-resources respectively. different first-type beams transmit the demodulation reference signal; the second transmission module is further configured to divide each second demodulation reference signal sub-resource into N2 third demodulation reference signal sub-resources, respectively, The demodulation reference signal is transmitted by using different beams of the second type respectively on the N2 third demodulation reference signal sub-resources.

Optionally, the same first-type beam and second-type beam are used to transmit the demodulation reference signal and the information on the first demodulation reference signal sub-resource and the first sub-resource that have the corresponding relationship, respectively.

Optionally, there is a one-to-one correspondence between the N1 second demodulation reference signal sub-resources and the N1 second sub-resources, and the second demodulation reference signal sub-resource with the corresponding relationship and the second There is a one-to-one correspondence between the N2 third demodulation reference signal sub-resources and the third sub-resources in the sub-resources.

Optionally, the first transmission module is further configured to transmit the demodulation reference signal and the second demodulation reference signal by using the same first-type beam on the second demodulation reference signal sub-resource and the second sub-resource with the corresponding relationship respectively. said information.

Optionally, the second transmission module is further configured to transmit the demodulation reference signal and the third demodulation reference signal using the same beam of the second type respectively on the third demodulation reference signal sub-resource and the third sub-resource that have the corresponding relationship. said information.

Optionally, the first resource granularity is one or more minimum scheduling time-frequency units of the system.

Optionally, the first resource granularity does not include resource elements other than those used for transmitting information.

Optionally, the first type of beam is characterized by a first type of beam index, and the second type of beam is characterized by a second type of beam index.

Optionally, the first type of beams are analog beams, and the second type of beams are digital precoding.

According to yet another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

dividing the first resource granularity into K1 second resource granularities, and using independent first-type beams to transmit information on the K1 second resource granularities respectively; and dividing each of the second resource granularities into K2 second resource granularities With three resource granularities, the K2 third resource granularities are respectively used to transmit information using independent second-type beams; wherein K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

Through the present invention, since the information is transmitted by using independent first-type beams on K1 second resource granularities respectively, and the independent second-type beams are respectively used on K2 third resource granularities to transmit information, the two types of beams can be simultaneously transmitted. Different beams are used to transmit information, which solves the problem of poor robustness of information transmission in the related art, and increases the reliability of information transmission while ensuring the coverage of information transmission.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a hybrid beamforming structure according to the related art;

2 is a flowchart of an information transmission method in a hybrid beamforming system according to an embodiment of the present invention;

3A is a schematic diagram 1 of the correspondence between different analog beams, digital precoding and data signal transmission resources under the large delay CDD transmission scheme according to the preferred embodiment 1 of the present invention;

3B is a schematic diagram 2 of the correspondence between different analog beams, digital precoding and data signal transmission resources under the large delay CDD transmission scheme according to the preferred embodiment 1 of the present invention;

4 is a schematic diagram 3 of the correspondence between different analog beams, digital precoding and data signal transmission resources under a CDD transmission scheme with a large delay in a preferred embodiment of the present invention;

5 is a schematic diagram of the corresponding relationship between demodulation reference signal resources and data signal transmission resources under the large delay CDD transmission scheme according to the preferred embodiment 2 of the present invention;

6 is a schematic diagram of the correspondence between different analog beams and digital precoding domain data signal transmission resources under the transmission diversity SFBC transmission scheme according to the preferred embodiment 3 of the present invention;

7 is a schematic diagram of the corresponding relationship between demodulation reference signal resources and data signal transmission resources under the transmission diversity SFBC transmission scheme according to the preferred embodiment 3 of the present invention;

FIG. 8 is a structural block diagram of an information transmission apparatus in a hybrid beamforming system according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

Method embodiment

This embodiment provides an information transmission method in a hybrid beamforming system. FIG. 2 is a flowchart of an information transmission method in a hybrid beamforming system according to an embodiment of the present invention. As shown in FIG. 2 , the The process includes the following steps:

Step S202, dividing the first resource granularity into K1 second resource granularities, and using independent first-type beams to transmit information on the K1 second resource granularities respectively; and

Step S204, dividing the second resource granularity into K2 third resource granularities, and using independent second-type beams to transmit information on the K2 third resource granularities respectively;

The resources used for transmitting the information include one or more of the first resource granularities, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

Through the above steps, independent first-type beams are used to transmit information on K1 second resource granularities respectively, and independent second-type beams are respectively used to transmit information on K2 third resource granularities, so that two types of different types of beams can be transmitted at the same time. The beam is used to transmit information, which solves the problem of poor robustness of information transmission in the related art, and increases the reliability of information transmission while ensuring the coverage of information transmission.

Optionally, the execution subject of the above steps may be a base station, a terminal, etc., but is not limited thereto.

Optionally, the execution order of step S202 and step S204 may be interchanged, that is, step S204 may be executed first, and then step S202 may be executed.

Optionally, the first type of beam may be characterized by a first type of beam index, and the second type of beam may be characterized by a second type of beam index.

Optionally, the first type of beams may be analog beams, and the second type of beams may be digital precoding. In this embodiment, the solution is mainly described based on this situation.

As a preferred embodiment, the first resource granularity includes one or a group of OFDM symbols in the time domain and one or a group of subcarriers in the frequency domain; the second resource granularity includes at least one of the first resource granularity One OFDM symbol; the third resource granularity includes at least one subcarrier in the second resource granularity.

As a preferred implementation manner, dividing the first resource granularity into N1*N2 first sub-resources includes: dividing the K1 (that is, all) second resource granularity into N1 second sub-resources, N1 different first-type beams are used respectively on the N1 second sub-resources to transmit information; K2 third resource granularities in each second sub-resource are divided into N2 third sub-resources, N2 different beams of the second type are respectively used on the N2 third sub-resources to transmit information; wherein, N1 is a positive integer less than or equal to K1, and N2 is a positive integer less than or equal to K2.

As a preferred implementation manner, N1 first-type beams are used to transmit information, and in the K1 second resource granularities, the i-th second resource granularity in the first specified order uses the x=imodN1+1th beam The first type of beam transmission information, where i is a positive integer less than or equal to K1, and x is a positive integer less than or equal to N1.

Optionally, N2 beams of the second type are used to transmit information, and in any one of the second resource granularities, the yth=jmodN2+1 second type is used on the jth third resource granularity in the second specified order. Beam transmission information, where j is a positive integer less than or equal to K2, and y is a positive integer less than or equal to N2.

Optionally, N1 groups of beams of the second type are used to transmit information, wherein each group includes N2 beams of the second type, and the i-th second resource granularity in the K1 second resource granularity is in the first specified order. According to the second specified order, the jth third resource granularity uses the z2=jmodN2+1 second type beam in the z1=imodN1+1 group to transmit information, where z1 is a positive integer less than or equal to N1, and z2 is A positive integer less than or equal to N2.

Optionally, the first specified order is from front to back in the time domain.

Optionally, the second specified order is one of the following: frequency domain from low to high; frequency domain from high to low; first frequency domain and then time domain, frequency domain from low to high or from low to high, time domain Front to back.

Optionally, the information includes information transmitted over a control channel or a data channel.

Optionally, configure demodulation reference signal resources for the information, and divide the demodulation reference signal resources into N1*N2 first demodulation reference signal sub-resources, the N1*N2 first demodulation reference signal sub-resources There is a one-to-one correspondence between the sub-resources and the N1*N2 first sub-resources, respectively. Wherein, the demodulation reference signal resource is used for demodulating the information.

Optionally, the position of the demodulation reference signal resource in the time domain is located before the information or at the start position of the information. Wherein, when the demodulation reference signal resources are located at the starting position of the information, the demodulation reference signal resources and the information occupy different subcarriers in the frequency domain respectively.

Optionally, the demodulation reference signal resource includes M demodulation reference signal ports, where M is a positive integer.

Optionally, the demodulation reference signal resources are divided into N1 second demodulation reference signal sub-resources, and different first-type beams are used respectively on the N1 second demodulation reference signal sub-resources to transmit the demodulation reference signal; divide each second demodulation reference signal sub-resource into N2 third demodulation reference signal sub-resources, and use different The second type of beam transmits the demodulation reference signal.

Optionally, the same first-type beam and second-type beam are used to transmit the demodulation reference signal and the information on the corresponding first demodulation reference signal sub-resource and the first sub-resource respectively.

Optionally, there is a one-to-one correspondence between the N1 pieces of second demodulation reference signal sub-resources and the N1 pieces of second sub-resources, and the second demodulation reference signal sub-resources with the corresponding relationship and the second There is a one-to-one correspondence between the N2 third demodulation reference signal sub-resources and the third sub-resources in the sub-resources.

Optionally, the same first-type beam is used to transmit the demodulation reference signal and the information on the corresponding second demodulation reference signal sub-resource and the second sub-resource respectively.

Optionally, the same second type of beam is used to transmit the demodulation reference signal and the information on the third demodulation reference signal sub-resource and the third sub-resource that have a corresponding relationship, respectively.

Optionally, the first resource granularity is one or more minimum scheduling time-frequency units of the system.

Optionally, the first resource granularity does not include resource elements other than those used for transmitting information.

This embodiment proposes an information transmission method in a hybrid beamforming system, and simultaneously uses the first type of beam and the second type of beam to transmit information, thereby increasing the reliability of information transmission while ensuring the coverage of information transmission , which solves the problem of poor robustness of information transmission in the related art.

The following description will be made with reference to the preferred embodiments, and the following preferred embodiments combine the above-mentioned embodiments and their preferred implementations.

The method proposed in the following preferred embodiments is suitable for wireless communication systems, such as high-frequency communication systems, especially for communication systems using hybrid beamforming structures, but other precoding/beamforming systems that use two-layer or two-stage precoding are not excluded. structured communication system.

The following preferred embodiment proposes an information transmission method in a hybrid beamforming system, including: dividing a first resource granularity into K1 second resource granularities, and using independent first resource granularities on the K1 second resource granularities respectively. One type of beam transmission information; each second resource granularity is divided into K2 third resource granularities, and independent second type beam transmission information is respectively used on the K2 third resource granularities. Wherein, K1 and/or K2 are positive integers greater than 1.

The first resource granularity includes one or a group of OFDM symbols in the time domain and one or a group of subcarriers in the frequency domain; the second resource granularity includes at least one OFDM symbol in the first resource granularity; the The third resource granularity includes at least one subcarrier in the second resource granularity.

Preferably, the first type of beams may be analog beams in the hybrid beamforming system, and the second type of beams may be digital precoding beams in the hybrid beamforming system. The following description mainly takes this case as an example.

Different first-type beams are characterized by different first-type beam indices (index) or identification (identity, ID for short), and different second-type beams are characterized by different second-type beam index (index) or identification (indentity). , referred to as ID).

It is worth noting that the "digital precoding" mentioned in the present invention is equivalent to "precoding", "precoding weight" and "precoding codeword". "Beam" and "Beam", "Analog Beamforming Weight", "Beamforming Weight" are equivalent. Preferably, the different analog beams are characterized by different beam identifiers (identities, ID for short) or beam indices, and different precoding codewords can also be characterized by different precoding codeword indices.

Specifically, dividing the first resource granularity into N1*N2 first sub-resources includes: dividing the K1 second resource granularity into N1 second sub-resources, where the N1 second sub-resources are divided into N1 second sub-resources. N1 different analog beams are used to transmit information on the resource, wherein each second sub-resource includes one or more second resource granularities; K2 third resource granularities on each second sub-resource It is divided into N2 third sub-resources, and N2 different digital precoding transmission information is respectively used on the N2 third sub-resources, wherein each third sub-resource includes one or more third resource granularities. Among them, N1 is a positive integer less than or equal to K1, and N2 is a positive integer less than or equal to K2. Preferably, the first resource granularity is a system minimum scheduling time-frequency unit, such as a physical resource block or a physical resource block pair, and the first resource granularity may also be composed of multiple system minimum scheduling time-frequency units.

Further, the transmission of information may include at least one of the following ways:

Manner 1: N1 analog beams are used to transmit information, and the information is transmitted using the xth=imodN1+1 analog beam on the i-th second resource granularity in the K1 second resource granularity in the first specified order, wherein , i is a positive integer less than or equal to K1, and x is a positive integer less than or equal to N1. Preferably, the first specified order is from front to back in the time domain.

Mode 2: use N2 digital precodings for information transmission, and use the yth=jmodN2+1 digital precoding to transmit information on the jth third resource granularity in the second specified order in any one of the second resource granularities , where j is a positive integer less than or equal to K2, and y is a positive integer less than or equal to N2. Preferably, the second specified order is one of the following: frequency domain from low to high, frequency domain from high to low, first frequency domain and then time domain, wherein frequency domain from low to high or from high to low and time domain from front to back.

Mode 3: N1 groups of digital precoding are used to transmit information, wherein each group includes N2 digital precodings, and in the K1 second resource granularities, according to the first specified order in the i-th second resource granularity, according to the 2. The jth third resource granularity in the specified order uses the z2=jmodN2+1 digital precoding transmission information in the z1=imodN1+1 group, where z1 is a positive integer less than or equal to N1, and z2 is less than or equal to N2. positive integer. Preferably, the first designation order is from front to back in the time domain, and the second designation order is from low to high in the frequency domain, from high to low in the frequency domain, first in the frequency domain and then in the time domain, wherein the frequency domain is from low to high Or from front to back in time domain from high to low.

Configuring demodulation reference signal (Demodulation Reference Signal, DMRS for short) resources for the information, dividing the demodulation reference signal resources into N1*N2 first demodulation reference signal sub-resources, the N1*N2 first demodulation reference signal sub-resources A demodulation reference signal sub-resource has a one-to-one correspondence with the N1*N2 first sub-resources. The demodulation reference signal resource is used to demodulate the information, and the same analog beam and digital precoding are used on the first demodulation reference signal sub-resource and the first sub-resource that have a corresponding relationship Tune reference signals and information.

Preferably, the demodulation reference signal resources are located before the resources occupied by the information transmission, or located at the beginning of the resources occupied by the information transmission, that is, located at the beginning of the resources occupied by the information transmission. One or more OFDM on the symbol. Wherein, when the demodulation reference signal resource is located at the start position of the resource occupied by the information transmission, the demodulation reference signal is frequency-division multiplexed with the information at the start position of the resource occupied by the information transmission. When the demodulation reference signal resource is located before the resource occupied by the information transmission, the demodulation reference signal is time-division multiplexed with the information.

Preferably, the demodulation reference signal resources include M demodulation reference signal ports, where M is a positive integer.

Preferably, the demodulation reference signal resources are divided into N1 second demodulation reference signal sub-resources, and different analog beams are used to transmit the demodulation reference on the N1 second demodulation reference signal sub-resources respectively. Divide each of the second demodulation reference signal sub-resources into N2 third demodulation reference signal sub-resources, and use different digital pre-resources on the N2 third demodulation reference signal sub-resources. The demodulation reference signal is encoded for transmission.

Preferably, there is a one-to-one correspondence between the N1 second demodulation reference signal sub-resources and the above-mentioned N1 second sub-resources used for information transmission. Further preferably, the same analog beam is used to transmit the demodulation reference signal and information on the second demodulation reference signal sub-resource and the second sub-resource that have a corresponding relationship, respectively.

Preferably, there is a one-to-one correspondence between N2 third demodulation reference signal sub-resources in the corresponding second demodulation reference signal sub-resources and N2 third sub-resources in the second sub-resource. Further preferably, the same precoding is used to transmit the demodulation reference signal and information on the third demodulation reference signal sub-resource and the third sub-resource that have a corresponding relationship, respectively.

The information includes data in a data channel or signaling in a control channel. It should be noted that, before the information is transmitted using analog beams and digital precoding, it may also undergo some other information processing processes. For example, in open-loop MIMO transmission, the information first passes through a unitary matrix to combine multi-stream information into single-stream information, and then passes the phase circulant matrix to map the single-stream information to the virtual antenna to complete the cyclic delay of the single-stream information. After the digital precoding and the weighted transmission process of the analog beam according to the present invention. Another example is the open-loop transmission diversity SFBC (Space Frequency Block Code, space frequency block code), the information is first processed by an SFBC, and then the weighted transmission process of the analog beam according to the present invention is performed. The method described in the present invention is preferably used in the open-loop transmission scheme of information (such as open-loop MIMO, open-loop transmit diversity SFBC, open-loop transmit diversity FSTD (Frequency Switched Transmit Diversity, frequency switched transmit diversity), etc.), but not Limited to this, it can also be used in other closed-loop transmission schemes. Considering that the processing of the above-mentioned open-loop transmission scheme and closed-loop transmission scheme may utilize the prior art, it will not be repeated here.

It should be noted that the N1*N2 first demodulation reference signal sub-resources need to be further divided into multiple smaller sub-resources according to different information through the beam and/or precoding pre-transmission processing scheme. For example, when the number of information transmission layers/streams v under the open-loop MIMO or closed-loop MIMO transmission scheme is greater than 1, each of the N1*N2 first demodulation reference signal sub-resources will be further divided into v smaller sub-resources, and the v smaller sub-resources in each of the first demodulation reference signal sub-resources use the same simulation

The information used to demodulate the v layers/streams respectively; when the number of information transmission layers/flow v is equal to 1, but the information is processed by SFBC, each of the N1*N2 first demodulation reference signal sub-resources will It is further divided into two parts, which are respectively used to demodulate the two information streams processed by SFBC; when the number of information transmission layers/process v is equal to 1, but the information is processed by FSTD, the N1*N2 first demodulation reference Each of the signal sub-resources will be further divided into four parts, which are respectively used to demodulate the four information streams processed by the FSTD.

It should be noted that, preferably, the "resources" mentioned in this preferred embodiment include at least one of time domain resources, frequency domain resources, code domain resources, power domain resources, and the like.

It is worth noting that, optionally, the first resource granularity does not include resource units other than those used for transmitting information, in other words, the first resource granularity only includes resource units that are/can be used for transmitting information, Here, resource units other than those used for transmitting information include many kinds, such as resource units for transmitting demodulation reference signals, resource units for transmitting measurement reference signals (for measuring channel quality), and resource units for transmitting synchronization signals. Resource units (for synchronization), etc.

信息首先经过数字预编码矩阵的加权，然后经过模拟波束赋形权值的加权之后通过N_t个天线发送给接收端。本优选实施例从另一方面来看即描述了信息如何基于数字预编码和模拟波束赋形发送出去的方法，以同时获得鲁棒性和覆盖性能。这里的信息可以是数据信道中传输的数据信号或者控制信道中传输的信令信号，为了具体描述方便，下面统一以数据信号为例进行说明。进一步地，下面以具体实施例说明本优选实施例的方法。Referring to Figure 1, the total number of transmitting antennas at the transmitting end is N _t , the number of transmitting radio frequency chains is N _RF , and the number of antennas linked by each transmitting radio frequency chain (also called RF chain) is

The information is first weighted by a digital precoding matrix, and then weighted by an analog beamforming weight, and then sent to the receiving end through N _t antennas. Another aspect of the preferred embodiment describes a method of how information is sent out based on digital precoding and analog beamforming to achieve both robustness and coverage performance. The information here may be a data signal transmitted in a data channel or a signaling signal transmitted in a control channel. For the convenience of specific description, the following uniformly takes the data signal as an example for description. Further, the method of this preferred embodiment is described below with specific embodiments.

Preferred Embodiment 1

The preferred embodiment 1 adopts the CDD technology, and adopts the same/different precoding sets on different beams.

The open-loop MIMO transmission scheme includes a scheme called Cyclic Delay Diversity (CDD for short), which artificially increases the frequency selectivity of the signal by transmitting different delayed versions of the same signal on different antennas.

The current CDD technology is mainly based on digital precoding. The goal of digital precoding is to ensure that the transmit energy is concentrated in the direction of the non-zero eigenvalues of the channel matrix H, so as to avoid wasting energy in the "ill-conditioned" space of the channel. Therefore, under the hybrid beamforming structure, not only the cyclic use of digital precoding in multiple value ranges needs to be considered, but also the cyclic use of analog beams in multiple value ranges.

As shown in FIG. 3A/3B, the first resource granularity includes one or a group of OFDM symbols in the time domain and one or a group of subcarriers in the frequency domain. Preferably, the first resource granularity is a physical resource block (PRB (Physical Resource Block). Block) pair, for the convenience of description, it is assumed here that a PRB pair includes 14 OFDM symbols in the time domain and 12 subcarriers in the frequency domain.

Wherein, the switching time unit of the analog beam is one or a group of OFDM symbols, and the switching unit of the digital precoding is one subcarrier or a group of subcarriers. For example, as shown in FIG. 3A , the switching time unit of the analog beam is one OFDM symbol, and the switching unit of digital precoding is one subcarrier. In Fig. 3B, the switching time unit of the analog beam is an OFDM symbol, and the switching unit of digital precoding is v subcarriers, that is, every v consecutive subcarriers in the frequency domain are used as a group, where v is the number of data signal transmission layers or flow count.

Assuming that there are 3 analog beams, the beam switching time unit is an OFDM symbol, and the 3 analog beams will be cyclically switched on 12 OFDM symbols; assuming that there are 4 digital precoding, and the switching unit of digital precoding is a subcarrier, The 4 analog beams will be cyclically switched on 12 subcarriers.

Specifically, for the i-th symbol and the l-th sub-carrier, the transmitted signal of the data signal after the large delay CDD (Large Delay CDD) can be expressed in the following form, wherein when the first resource granularity is a PRB pair and the assumption is as above, The value of i ranges from 0 to 13, and the value of l ranges from 0 to 11:

in:

为初始发送信号，为v×1维，其中初始发送信号的层数为v层/流，s_r(r＝0,1,...,v-1)为第r层/流初始发送信号；

is the initial transmission signal, which is v×1 dimension, where the number of layers of the initial transmission signal is v layer/stream, and s _r (r=0,1,...,v-1) is the rth layer/stream initial transmission signal ;

U is a fixed matrix with dimensions of v×v, and its main function is to mix the v multiplexed data streams into a single data stream. Preferably, the value of the matrix is the same as that of LTE;

D(l) is the phase cyclic matrix on the lth subcarrier, which is v×v dimension. It mainly completes the mapping of the mixed single data stream to the virtual antenna, and completes the cyclic delay of the single data stream. Preferably, the matrix The value is the same as LTE;

其中L1为一个OFDM符号组内符号个数，即每L1个OFDM符号为一组使用一个相同的波束赋形权值，L2为波束赋形权值的取值范围下包括的不同波束赋形权值的个数，例如图3A/图3B中，L1＝1，L2＝3；W(i) represents the (analog) beamforming weight on the ith symbol, which is N _t ×N _RF dimension, W(i)=D _k ,

Among them, L1 is the number of symbols in an OFDM symbol group, that is, every L1 OFDM symbol is a group using the same beamforming weight, and L2 is the different beamforming weights included in the value range of the beamforming weights. The number of values, for example, in FIG. 3A/FIG. 3B, L1=1, L2=3;

其中K1为一个OFDM符号组内符号个数，即在频域上每K1个子载波为一组使用一个相同的预编码权值，K2为预编码权值的取值范围下包括的不同预编码权值的个数，例如图3A中，K1＝1，K2＝4，图3B中，K1＝v＝2，K2＝4。F(l) represents the (digital) precoding weight on the lth subcarrier, which is N _RF ×v dimension, F(l)=C _k ,

Where K1 is the number of symbols in an OFDM symbol group, that is, every K1 subcarriers in the frequency domain use a same precoding weight for a group, and K2 is the different precoding weights included in the value range of the precoding weights The number of values, for example, in FIG. 3A, K1=1, K2=4, and in FIG. 3B, K1=v=2, K2=4.

As another implementation of the embodiment of the present invention, for the i-th symbol and the l-th subcarrier, the transmitted signal of the data signal after the large delay CDD (Large Delay CDD) can be expressed as:

in:

U、D(l)和W(i)的解释同上；

U, D(l) and W(i) are explained as above;

其中L1、L2、K1如上解释，K2这里指每个(模拟)波束下的频域(数字)预编码权值取值个数，例如，对于如图4所示，K2＝4，波束1下对应的预编码取值范围为{预编码权值1～4}，波束2下对应的预编码取值范围为{预编码权值5～8}，波束3下对应的预编码取值范围为{预编码权值9～12}。F(i,l) represents the (digital) precoding weight on the i-th symbol and the l-th subcarrier, which is N _RF ×v dimension, F(i,l)=C _k ,

Among them, L1, L2, and K1 are explained above, and K2 here refers to the number of frequency domain (digital) precoding weights under each (analog) beam. For example, as shown in Figure 4, K2=4, beam 1 The corresponding precoding value range is {precoding weight 1~4}, the corresponding precoding value range under beam 2 is {precoding weight 5~8}, and the corresponding precoding value range under beam 3 is {Precoding weights 9 to 12}.

采用基于傅里叶(Fourier)变换的酉矩阵，Preferably, under the initial data signal transmission of the v layer, the fixed matrix

Using a unitary matrix based on Fourier transform,

The CDD phase shift operation is as follows:

Among them preferably,

For example, assuming that v does not exceed 4, the values of U and D(l) are shown in Table 1 below:

Table 1

Example 2

In this preferred embodiment, the CDD technology is adopted, and the correspondence between DMRS and data is one-to-one correspondence.

As shown in FIG. 5 , the demodulation reference signal related to the transmitted data signal occupies the first 3 OFDM symbols of a PRB pair, and the remaining OFDM symbols are used for transmitting the data signal.

The transmission resource of the data signal is divided into 12 sub-resources, which are respectively transmitted using different analog beams and/or digital precoding weights. For example, the number of analog beams used for data signal transmission is 3, and the switching unit is an OFDM symbol. The number of digital precoding used for data signal transmission is 4, and the switching unit is one subcarrier.

The resources of the demodulation reference signal are also divided into 4x3=12 sub-resources, which have a one-to-one correspondence with the divided 12 sub-resources of the data signal transmission resources, and the same analog beam and digital precoding. There are many specific division methods. The division rules can be the same as the division resources of data preference transmission resources, or they can be different. For example, in the same case, the number of analog beams used for demodulating the reference signal is also three, and the switching unit is one OFDM symbol, the number of digital precoding used for demodulation reference signal transmission is 4, and the switching unit is one subcarrier.

Based on the 12 sub-resources of the demodulation reference signal, the receiving end demodulates the 12 sub-resources of the corresponding data signal transmission resources respectively.

When the number of transmission layers/streams v of the data signal is greater than 1, the demodulation reference signal resources are divided into N1*N2*v sub-resources, which can also be understood as every N1*N2 demodulation reference signal sub-resources. Each demodulation reference signal sub-resource is further divided into v smaller sub-resources, and the v smaller sub-resources in each demodulation reference signal sub-resource use the same beam and precoding, respectively. v-layer for demodulating the data signal under each different beam and/or precoded transmission.

The correspondence between the above-mentioned data signal transmission resources and demodulation reference signal resources is pre-agreed or notified through signaling.

Example 3

The SFBC technique is used in this preferred embodiment, and multiple beams are considered.

FIG. 6 is a schematic diagram showing the correspondence between different analog beams and data signal transmission resources in the digital precoding domain under the transmission diversity SFBC transmission scheme according to the preferred embodiment 3 of the present invention. As shown in FIG. 6 , it is the data signal transmission resources used for SFBC processing. Schematic diagram, when the UE moves relatively fast, accurate beam information cannot be obtained through feedback. Therefore, in order to ensure the coverage performance and transmission robustness of the data signal processed by SFBC, the transmission of the data signal can be circulated within the range of multiple analog beams switch. The switching unit of each analog beam is one or a group of OFDM symbols. For example, in Fig. 6, in the data signal transmission resource area, the data signal is transmitted in different time units with different analog beams, the switching unit of the data signal in the figure is an OFDM symbol, and there are 3 different analog beams available for For the transmission of data signals, in the data signal transmission resource area, in the order from front to back in the time domain, SFBC data signals on different OFDM symbols are transmitted using one of the three analog beams in a cyclic switching manner.

Specifically, under the hybrid precoding structure, for the i-th symbol and the l-th subcarrier, the transmitted signal of the data signal after SFBC is expressed in the following form, where when the first resource granularity is a PRB pair and assumed as above, i The value range of l is 0~13, and the value range of l is 0~11:

in,

为初始发送信号经过串行变并行后的两个数据信号；

It is the two data signals after the initial transmission signal is changed from serial to parallel;

这两个数据流所传输的信息是相同的，这两个数据流分别映射到两个子载波上，优选地映射到数据信号传输资源中每两个相邻的子载波上。The SFBC operation here is the same as the existing technology in LTE, for example, after SFBC, the data signal becomes two parallel and approximately orthogonal data streams

The information transmitted by the two data streams is the same, and the two data streams are respectively mapped to two subcarriers, preferably to every two adjacent subcarriers in the data signal transmission resource.

其中L1为一个OFDM符号组内符号个数，即每L1个OFDM符号为一组使用一个相同的波束赋形权值，L2为波束赋形权值的取值范围下的波束赋形权值个数，例如图5中，L1＝1，L2＝3。W(i) is the analog beamforming weight on the ith symbol, W(i)=C _k ,

Among them, L1 is the number of symbols in an OFDM symbol group, that is, every L1 OFDM symbol is a group using the same beamforming weight, and L2 is the beamforming weight within the value range of the beamforming weight. For example, in FIG. 5, L1=1, L2=3.

Here, the SFBC data signal is not weighted by the digital precoding weights. In fact, it can also be understood that the digital precoding is a unit matrix, that is, the signal processed by SFBC first undergoes a unit matrix digital precoding and then is weighted by the analog beam. transmission.

As shown in Figure 7, considering the demodulation reference signal configuration, it is assumed that the first three OFDM symbols in a PRB pair are used to transmit demodulation reference signals, which are mainly used to demodulate the two SFBC-processed OFDM symbols. Considering that 3 analog beams are used for the transmission of data streams, the demodulation reference signal resources will be divided into 6 resources, for example, the demodulation reference signal resources are divided into 3 sub-resources (as shown in Fig. The sub-resources are 3 different OFDM symbols respectively), and the demodulation reference signal is transmitted on these 3 sub-resources using the same 3 analog beams as those used for data signal transmission. The sub-carriers of each OFDM symbol are respectively transmitted. It is divided into two parts, which can be used to demodulate the two SFBC data signal streams for data transmission under the analog beam corresponding to the OFDM symbol. For example, the two data signals 1 and For the data signal 2, the demodulation reference signal resource 1 and the demodulation reference signal resource 2 under different analog beams are respectively used to demodulate the two data signals under the corresponding analog beam transmission.

From the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

Device embodiment

This embodiment also provides an information transmission device in a hybrid beamforming system, the device is used to implement the above-mentioned embodiments and preferred implementations, and what has been described will not be repeated. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementations in hardware, or a combination of software and hardware, are also possible and contemplated.

FIG. 8 is a structural block diagram of an information transmission apparatus in a hybrid beamforming system according to an embodiment of the present invention. As shown in FIG. 8 , the apparatus includes:

a first transmission module 82, configured to divide the first resource granularity into K1 second resource granularities, and use independent analog beams to transmit information on the K1 second resource granularities respectively; and

A second transmission module 84, configured to divide each of the second resource granularities into K2 third resource granularities, and use independent digital precoding to transmit information on the K2 third resource granularities;

The resources used for transmitting the information include one or more of the first resource granularities, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

Optionally, the first type of beam may be characterized by a first type of beam index, and the second type of beam may be characterized by a second type of beam index.

Optionally, the first type of beams may be analog beams, and the second type of beams may be digital precoding. In this embodiment, the solution is mainly described based on this situation.

Optionally, the first resource granularity includes one or a group of OFDM symbols in the time domain and one or a group of subcarriers in the frequency domain; the second resource granularity includes at least one OFDM symbol in the first resource granularity ; the third resource granularity includes at least one subcarrier in the second resource granularity.

Optionally, the first transmission module is further configured to divide the K1 (ie all) second resource granularities into N1*N2 first sub-resources in the case that the first resource granularity is divided into N1*N2 first sub-resources. N1 sets of second sub-resources, and N1 different analog beams are used to transmit information on the N1 sets of second sub-resources; and the second transmission module is further configured to transmit K2 in each of the second sub-resources The third resource granularity is divided into N2 third sub-resources, and N2 different digital precoding transmission information is used on the N2 third sub-resources respectively; wherein, N1 is a positive integer less than or equal to K1, and N2 is A positive integer less than or equal to K2.

Optionally, the first transmission module is further configured to, in the case where N1 analog beams are used to transmit information, the i-th second resource granularity in the K1 second resource granularities in a first specified order. The xth analog beam is used to transmit information above, where i is a positive integer less than or equal to K1, x=imodN1+1, and x is a positive integer less than or equal to N1.

Optionally, the second transmission module is further configured to, in the case where N2 digital precoding is used to transmit information, the jth third resource in any one of the second resource granularities in the second specified order. In terms of granularity, the yth digital precoding is used to transmit information, where j is a positive integer less than or equal to K2, y=jmodN2+1, and y is a positive integer less than or equal to N2.

Optionally, the second transmission module is further configured to use N1 groups of digital precoding for transmitting information, and each group contains N2 digital precodings, in the first specified order, in the K1 th In the i-th second resource granularity in the second resource granularity, the z2-th digital precoding transmission information in the z1-th group is used on the j-th third resource granularity in the second specified order, where z1=imodN1+1, z2=jmodN2+1, z1 is a positive integer less than or equal to N1, and z2 is a positive integer less than or equal to N2.

Optionally, the first specified order is from front to back in the time domain.

Optionally, the second specified order is one of the following: frequency domain from low to high; frequency domain from high to low; first frequency domain and then time domain, and frequency domain from low to high or from low to high, when Domains are from front to back.

Optionally, the information includes information transmitted through a control channel or a data channel.

Optionally, the apparatus further includes: a configuration module configured to configure demodulation reference signal resources for the information, and divide the demodulation reference signal resources into N1*N2 first demodulation reference signal sub-resources, The N1*N2 first demodulation reference signal sub-resources respectively have a one-to-one correspondence with the N1*N2 first sub-resources; wherein, the demodulation reference signal resources are used for demodulating the information.

Optionally, the position of the demodulation reference signal resource in the time domain is located before the information or at the start position of the information; wherein, when the demodulation reference signal resource is located at the start position of the information, The demodulation reference signal resources and the information occupy different subcarriers respectively in the frequency domain.

Optionally, the demodulation reference signal resource includes M demodulation reference signal ports, where M is a positive integer.

Optionally, the first transmission module is further configured to divide the demodulation reference signal resource into N1 second demodulation reference signal sub-resources, and use the N1 second demodulation reference signal sub-resources respectively. Different analog beams transmit the demodulation reference signal; the second transmission module is further configured to divide each second demodulation reference signal sub-resource into N2 third demodulation reference signal sub-resources, respectively. The N2 third demodulation reference signal sub-resources respectively use different digital precoding to transmit the demodulation reference signal.

Optionally, the demodulation reference signal and the information are transmitted by using the same analog beam and digital precoding on the first demodulation reference signal sub-resource and the first sub-resource that have the corresponding relationship, respectively.

Optionally, there is a one-to-one correspondence between the N1 second demodulation reference signal sub-resources and the N1 second sub-resources, and the second demodulation reference signal sub-resource with the corresponding relationship and the second There is a one-to-one correspondence between the N2 third demodulation reference signal sub-resources and the third sub-resources in the sub-resources.

Optionally, the first transmission module is further configured to use the same analog beam to transmit the demodulation reference signal and the information.

Optionally, the second transmission module is further configured to use the same digital precoding on the third demodulation reference signal sub-resource and the third sub-resource to which the corresponding relationship exists, respectively, to transmit the demodulation reference signal and the third sub-resource. described information.

Optionally, the first resource granularity is one or more minimum scheduling time-frequency units of the system.

Optionally, the first resource granularity does not include resource elements other than those used for transmitting information.

According to yet another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

dividing the first resource granularity into K1 second resource granularities, and using independent analog beams to transmit information on the K1 second resource granularities; and dividing each of the second resource granularities into K2 third resources Granularity, independent digital precoding is used to transmit information on the K2 third resource granularities, wherein K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

It should be noted that the above modules can be implemented by software or hardware, and the latter can be implemented in the following ways, but not limited to this: the above modules are all located in the same processor; or, the above modules can be combined in any combination The forms are located in different processors.

Embodiments of the present invention also provide a storage medium. Optionally, in this embodiment, the above-mentioned storage medium may be configured to store program codes for executing the following steps:

Step S202, dividing the first resource granularity into K1 second resource granularities, and using independent analog beams to transmit information on the K1 second resource granularities respectively; and

Step S204, dividing the second resource granularity into K2 third resource granularities, and using independent digital precoding transmission information on the K2 third resource granularities;

Wherein, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1.

Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic Various media that can store program codes, such as discs or optical discs.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and optional implementation manners, and details are not described herein again in this embodiment.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device, such that they may be stored in a storage device and executed by the computing device, and in some cases, in a different order than here The steps shown or described are performed either by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps of them into a single integrated circuit module. As such, the present invention is not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (38)

1. An information transmission method in a hybrid beamforming system, comprising:

dividing a first resource granularity into K1 second resource granularities, and transmitting information by using independent first-class beams on the K1 second resource granularities respectively; and

dividing each second resource granularity into K2 third resource granularities, and transmitting information by using independent second-type beams on the K2 third resource granularities respectively;

wherein the resources used to transmit the information comprise one or more of the first resource granularity, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1;

wherein, in a case of partitioning the first resource granularity into N1 × N2 shares of first sub-resources, the method comprises:

dividing all the second resource granularities into N1 parts of second sub-resources, and transmitting information by using N1 different first-class beams on the N1 parts of second sub-resources respectively; and

dividing K2 third resource granularities in each second sub-resource into N2 parts of third sub-resources, and transmitting information by using N2 different second-class beams on the N2 parts of third sub-resources respectively;

wherein N1 is a positive integer less than or equal to K1, and N2 is a positive integer less than or equal to K2;

wherein, still include:

configuring demodulation reference signal resources for the information, and dividing the demodulation reference signal resources into N1 × N2 parts of first demodulation reference signal sub-resources, wherein the N1 × N2 parts of first demodulation reference signal sub-resources respectively have a one-to-one correspondence relationship with the N1 × N2 parts of first sub-resources;

wherein the demodulation reference signal resources are used for demodulating the information.

2. The method of claim 1, further comprising:

the first resource granularity comprises one or a group of OFDM symbols in a time domain and one or a group of subcarriers in a frequency domain;

the second resource granularity comprises at least one OFDM symbol in the first resource granularity;

the third resource granularity includes at least one subcarrier in the second resource granularity.

3. The method of claim 1, further comprising:

in the case where N1 first-type beams are used for transmitting information, the information is transmitted using the xth first-type beam at the ith one of the K1 second resource granularities in a first designated order, where i is a positive integer less than or equal to K1, x is imodN1+1, and x is a positive integer less than or equal to N1.

4. The method of claim 1, further comprising:

and in the case that N2 second-type beams are used for transmitting information, transmitting information by using a y second-type beam on a j third resource granularity in any one second resource granularity according to a second specified order, wherein j is a positive integer less than or equal to K2, y is jmodN2+1, and y is a positive integer less than or equal to N2.

5. The method of claim 1, further comprising:

when N1 sets of beams of the second type are used for transmitting information, and each set contains N2 beams of the second type, z2 beams of the z1 set are used for transmitting information on the ith resource granularity of the K1 second resource granularities in the first designated order and the jth resource granularity in the second designated order, wherein z1 is imodN1+1, z2 is jmodN2+1, z1 is a positive integer smaller than or equal to N1, and z2 is a positive integer smaller than or equal to N2.

6. The method of claim 3 or 5, wherein the first specified order is time domain from front to back.

7. The method according to claim 4 or 5, wherein the second specified order is one of:

the frequency domain is from low to high;

the frequency domain goes from high to low;

the frequency domain is first followed by the time domain, and the frequency domain is from low to high or from high to low, and the time domain is from front to back.

8. The method of claim 1, wherein the information comprises information transmitted over a control channel or a data channel.

9. The method of claim 1, further comprising:

the position of the demodulation reference signal resource in the time domain is located before the information or at the starting position of the information; when the demodulation reference signal resource is located at the start position of the information, the demodulation reference signal resource and the information respectively occupy different subcarriers in a frequency domain.

10. The method of claim 1, further comprising:

the demodulation reference signal resource comprises M demodulation reference signal ports, wherein M is a positive integer.

11. The method of claim 1, further comprising:

dividing the demodulation reference signal resources into N1 parts of second demodulation reference signal sub-resources, and transmitting the demodulation reference signals on the N1 parts of second demodulation reference signal sub-resources by using different first beams respectively;

and dividing each part of the second demodulation reference signal sub-resources into N2 parts of third demodulation reference signal sub-resources, and transmitting the demodulation reference signals on the N2 parts of the third demodulation reference signal sub-resources by using different beams of a second type.

12. The method of claim 1, further comprising:

and respectively transmitting the demodulation reference signal and the information by using the same first-type beam and second-type beam on the first demodulation reference signal sub-resource and the first sub-resource which have the corresponding relation.

13. The method of claim 11, further comprising:

and a one-to-one correspondence relationship exists between the N1 parts of second demodulation reference signal sub-resources and the N1 parts of second sub-resources, and a one-to-one correspondence relationship exists between the second demodulation reference signal sub-resources having the correspondence relationship and the N2 parts of third demodulation reference signal sub-resources and third sub-resources in the second sub-resources.

14. The method of claim 13, further comprising:

and respectively transmitting the demodulation reference signal and the information by using the same first type of beams on a second demodulation reference signal sub-resource and a second sub-resource which have the corresponding relation.

15. The method of claim 13, further comprising:

and respectively transmitting the demodulation reference signal and the information by using the same second-type beam on a third demodulation reference signal sub-resource and a third sub-resource which have the corresponding relation.

16. The method of any one of claims 1 to 5, 8 to 15, further comprising:

the first resource granularity is one or more system minimum scheduling time-frequency units.

17. The method of any one of claims 1 to 5, 8 to 15, further comprising:

the first resource granularity excludes resource units other than those used for transmitting information.

18. The method according to any of claims 1 to 5, 8 to 15, wherein the first type of beam is characterized by a first type of beam index and the second type of beam is characterized by a second type of beam index.

19. The method according to any of claims 1 to 5 and 8 to 15, wherein the first type of beams are analog beams and the second type of beams are digital pre-coding.

20. An information transmission apparatus in a hybrid beamforming system, comprising:

the first transmission module is used for dividing the first resource granularity into K1 second resource granularities and transmitting information by using independent first-class beams on the K1 second resource granularities respectively; and

a second transmission module, configured to divide each of the second resource granularities into K2 third resource granularities, and transmit information using independent beams of a second type on the K2 third resource granularities, respectively;

wherein the resources used to transmit the information comprise one or more of the first resource granularity, K1 and K2 are positive integers, and K1 and/or K2 are greater than 1;

wherein,

the first transmission module is further configured to, in a case that the first resource granularity is divided into N1 × N2 parts of first sub-resources, divide all the second resource granularity into N1 parts of second sub-resources, and transmit information on N1 parts of second sub-resources using N1 different first type beams, respectively; and

the second transmission module is further configured to divide K2 granularity of the third resource in each of the second sub-resources into N2 parts of third sub-resources, and transmit information using N2 different second-class beams on the N2 parts of third sub-resources, respectively;

wherein N1 is a positive integer less than or equal to K1, and N2 is a positive integer less than or equal to K2;

wherein, still include:

a configuration module, configured to configure demodulation reference signal resources for the information, and divide the demodulation reference signal resources into N1 × N2 parts of first demodulation reference signal sub-resources, where N1 × N2 parts of the first demodulation reference signal sub-resources have a one-to-one correspondence relationship with N1 × N2 parts of the first sub-resources, respectively;

wherein the demodulation reference signal resources are used for demodulating the information.

21. The apparatus of claim 20,

the first resource granularity comprises one or a group of OFDM symbols in a time domain and one or a group of subcarriers in a frequency domain;

the second resource granularity comprises at least one OFDM symbol in the first resource granularity;

the third resource granularity includes at least one subcarrier in the second resource granularity.

22. The apparatus of claim 20,

the first transmission module is further configured to transmit information using an xth first beam type on an ith second resource granularity of the K1 second resource granularities in a first specified order if N1 first beam types are used for transmitting information, where i is a positive integer less than or equal to K1, x is imodN1+1, and x is a positive integer less than or equal to N1.

23. The apparatus of claim 20,

the second transmission module is further configured to transmit information using a jth second-type beam at a jth third resource granularity in any one of the second resource granularities according to a second specified order, where j is a positive integer less than or equal to K2, y is jmodN2+1, and y is a positive integer less than or equal to N2, where N2 second-type beams are used for transmitting information.

24. The apparatus of claim 20,

the second transmission module is further configured to transmit information using z2 second type beams in a z1 group in a first designated order among ith second resource granularities among the K1 second resource granularities and in a second designated order among jth third resource granularities in a case where N1 groups of second type beams are used for transmitting information and each group includes N2 second type beams, where z1 is imodN1+1, z2 is jmodN2+1, z1 is a positive integer smaller than or equal to N1, and z2 is a positive integer smaller than or equal to N2.

25. The apparatus according to claim 22 or 24, wherein the first designated order is time domain from front to back.

26. The apparatus of claim 23 or 24, wherein the second specified order is one of:

the frequency domain is from low to high;

the frequency domain goes from high to low;

the frequency domain is first followed by the time domain, and the frequency domain is from low to high or from high to low, and the time domain is from front to back.

27. The apparatus of claim 20, wherein the information comprises information transmitted over a control channel or a data channel.

28. The apparatus of claim 27, wherein the position of the demodulation reference signal resource in the time domain is located before the information or at a start position of the information; when the demodulation reference signal resource is located at the start position of the information, the demodulation reference signal resource and the information respectively occupy different subcarriers in a frequency domain.

29. The apparatus of claim 27, wherein the demodulation reference signal resources comprise M demodulation reference signal ports, where M is a positive integer.

30. The apparatus of claim 27,

the first transmission module is further configured to divide the demodulation reference signal resources into N1 parts of second demodulation reference signal sub-resources, and transmit the demodulation reference signals on the N1 parts of second demodulation reference signal sub-resources by using different first beams, respectively;

the second transmission module is further configured to divide each second demodulation reference signal sub-resource into N2 third demodulation reference signal sub-resources, and transmit the demodulation reference signal on N2 third demodulation reference signal sub-resources using different second type beams, respectively.

31. The apparatus according to claim 27, wherein the demodulation reference signal and the information are transmitted using the same first type beam and second type beam on a first demodulation reference signal sub-resource and a first sub-resource where the correspondence exists, respectively.

32. The apparatus of claim 30, wherein there is a one-to-one correspondence between the N1 second dmrs signal sub-resources and the N1 second sub-resources, and wherein there is a one-to-one correspondence between the N2 third dmrs signal sub-resources and the third sub-resources in the second dmrs signal sub-resources and the corresponding second srs resources.

33. The apparatus of claim 32,

the first transmission module is further configured to transmit the demodulation reference signal and the information using the same first type of beam on a second demodulation reference signal sub-resource and a second sub-resource that have the corresponding relationship, respectively.

34. The apparatus of claim 32,

the second transmission module is further configured to transmit the demodulation reference signal and the information using the same second type beam on a third demodulation reference signal sub-resource and a third sub-resource that have the corresponding relationship, respectively.

35. The apparatus according to any of claims 20-24 and 27-34, wherein the first resource granularity is one or more system minimum scheduling time-frequency units.

36. The apparatus of any of claims 20-24 and 27-34, wherein the first resource granularity does not include resource units other than those used for transmitting information.

37. The apparatus according to any of claims 20-24 and 27-34, wherein the first type of beam is characterized by a first type of beam index and the second type of beam is characterized by a second type of beam index.

38. The apparatus according to any of claims 20 to 24 and 27 to 34, wherein the first type of beams are analog beams and the second type of beams are digital pre-coding.

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