WO2020118728A1

WO2020118728A1 - Communication method and apparatus

Info

Publication number: WO2020118728A1
Application number: PCT/CN2018/121336
Authority: WO
Inventors: 高翔; 刘鹍鹏; 张瑞齐
Original assignee: 华为技术有限公司
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-18
Also published as: CN113169775B; CN113169775A

Abstract

The present application provides a communication method and apparatus, relating to the field of communication technology, being able to reduce precoding matrix indicator (PMI) overheads in a MIMO system. Said method comprises: a terminal determining K beams from 2L-1 beams, and sending a precoding matrix indicator (PMI) to an access network device, the PMI being used to indicate combining coefficients corresponding to the 2L-1 beams on each spatial layer, respectively, the combining coefficients respectively corresponding to the 2L-1 beams on said each spatial layer including combining coefficients corresponding to each of the K beams at at least two frequency domain units, respectively, and combining coefficients corresponding to each of the 2L-1 beams except the K beams at at least two frequency domain units, respectively, or the combining coefficients respectively corresponding to the 2L-1 beams including the combining coefficients corresponding to each of the K beams at at least two frequency domain units, respectively, and wideband combining coefficients corresponding to each of the 2L-1 beams except the K beams. L and K are both positive integers.

Description

通信方法及装置Communication method and device

技术领域Technical field

本申请涉及通信技术领域，尤其涉及一种通信方法及装置。This application relates to the field of communication technology, and in particular, to a communication method and device.

背景技术Background technique

在长期演进(Long Term Evolution，LTE)***以及第五代(fifth generation，5G)新空口(new radio，NR)中，为了提升***容量，引入了多输入多输出(Multiple Input and Multiple Output，MIMO)技术。MIMO通过在发射端和接收端分别使用多个发射天线和接收天线，使信号通过发射端与接收端的多个天线传送和接收，从而改善通信质量。它能充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍的提高***信道容量。In the Long Term Evolution (LTE) system and the fifth generation (5G) new radio (NR), in order to improve the system capacity, multiple input and multiple output (Multiple Input and Multiple Output, MIMO) are introduced )technology. MIMO uses multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end, respectively, to transmit and receive signals through multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. It can make full use of space resources, realize multiple sending and multiple receiving through multiple antennas, and can increase the system channel capacity by multiples without increasing the spectrum resources and antenna transmission power.

其中，在MIMO中，可以通过预编码(Precoding)将用户的数据映射到不同的空间域上，从而通过不同天线端口传输用户的数据。预编码过程中，需要使用预编码矩阵对发射信号进行处理。对于不同***，基站获取预编码矩阵的方式可能不同。具体的额，对于时分双工(Time Division Duplexing，TDD)***，基站可以利用无线信道的上下行互异性，根据上行信道来估计出下行的预编码矩阵。对于频分双工(Time Division Duplexing，FDD)***，上下行采用不同的频段，无法利用上行信道来获得下行的预编码矩阵，通常，终端向基站反馈预编码矩阵指示(Precoding Matrix Indicator，PMI)，基站根据PMI获取下行最优的预编码矩阵。PMI中包含终端选取的多个波束的索引、每一波束在不同频域子带的特征等内容，开销较大。因此，亟待提出一种降低PMI开销的方法。Among them, in MIMO, user data can be mapped to different spatial domains through precoding (Precoding), thereby transmitting user data through different antenna ports. During the precoding process, it is necessary to use a precoding matrix to process the transmitted signal. For different systems, the way in which the base station obtains the precoding matrix may be different. Specifically, for a time division duplex (Time Division Duplexing, TDD) system, the base station can use the uplink and downlink mutuality of the wireless channel to estimate the downlink precoding matrix according to the uplink channel. For a Frequency Division Duplexing (FDD) system, the uplink and downlink use different frequency bands, and the uplink channel cannot be used to obtain the downlink precoding matrix. Generally, the terminal feeds back the precoding matrix indication (Precoding Matrix Indicator, PMI) to the base station. , The base station obtains the optimal downlink precoding matrix according to the PMI. The PMI includes the indexes of multiple beams selected by the terminal, the characteristics of each beam in different frequency domain subbands, and the like, and the overhead is relatively large. Therefore, it is urgent to propose a method to reduce the PMI overhead.

发明内容Summary of the invention

本申请实施例提供一种通信方法及装置，以提升MIMO***中的PMI开销。Embodiments of the present application provide a communication method and device to improve PMI overhead in a MIMO system.

为达到上述目的，本申请实施例采用如下技术方案：To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

第一方面，本申请实施例提供一种通信方法，该方法应用于终端或终端中的芯片，该方法包括：终端从2L-1个波束中确定K个波束，所述终端向接入网设备发送预编码矩阵指示PMI。In a first aspect, an embodiment of the present application provides a communication method, which is applied to a terminal or a chip in the terminal. The method includes: the terminal determines K beams from 2L-1 beams, and the terminal sends an access network device Send a precoding matrix to indicate PMI.

其中，L、K均为正整数，K<2L-1。可选的，L大于或等于2。所述PMI用于指示每一个空间层上2L-1个波束各自对应的合并系数，所述2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元处分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束对应的宽带合并系数。Among them, L and K are positive integers, K<2L-1. Optionally, L is greater than or equal to 2. The PMI is used to indicate the respective merge coefficients of the 2L-1 beams on each spatial layer, and the merge coefficients corresponding to the 2L-1 beams include each of the K beams in at least two frequency domains The respective merge coefficients at the unit, and the merge coefficients corresponding to each of the 2L-1 beams except the K beams in at least two frequency domain units, or the 2L-1 beams each The corresponding combining coefficients include combining coefficients corresponding to at least two frequency domain units of each beam of the K beams, and broadband combining corresponding to each beam except the K beams of the 2L-1 beam coefficient.

其中，本申请涉及的频域单元主要指的是PMI的频域粒度。可选的，频域单元可以指子带，即频域单元的带宽与子带带宽相同，或者，频域单元的带宽可以是子带带宽的1/2，或者，频域单元的带宽可以是子带带宽的1/4。当然，随着通信协议的进展，频域单元还可能具有其他划分粒度。Among them, the frequency domain unit involved in this application mainly refers to the frequency domain granularity of PMI. Optionally, the frequency domain unit may refer to a subband, that is, the bandwidth of the frequency domain unit is the same as the bandwidth of the subband, or the bandwidth of the frequency domain unit may be 1/2 of the bandwidth of the subband, or the bandwidth of the frequency domain unit may be 1/4 of the subband bandwidth. Of course, as the communication protocol progresses, the frequency domain unit may also have other division granularities.

采用上述终端上报低优先级波束的合并系数的方法，在一种实现方式中，在每个空间层上，对MIMO***性能影响较小的低优先级波束，终端上报相同几个频域单元处的合并系数，并且，仅指示相同几个频域单元的索引即可，一方面，降低了指示频域单元索引的比特开销，另一方面，相比于现有技术中，对于宽带幅度小的波束，仅上报波束的宽带幅度，本申请实施例中，可以上报低优先级波束的部分频域单元幅度，能够更加精细的反映合并系数的频域单元的特征，减少***性能损失。在另一实现方式中，终端上报低优先级波束的宽带合并系数，也就是说，对于每一低优先级波束，仅上报一个宽带合并系数，无需上报频域单元索引，也无需上报多个频域单元合并系数，进一步降低了上报PMI的开销。Using the above method for reporting the combining coefficients of low priority beams by the terminal, in one implementation, at each spatial layer, the low priority beams that have little effect on the performance of the MIMO system, the terminal reports to the same frequency domain unit And only need to indicate the index of the same frequency domain unit. On the one hand, the bit overhead for indicating the index of the frequency domain unit is reduced. On the other hand, compared with the prior art, The beam only reports the wideband amplitude of the beam. In the embodiment of the present application, it is possible to report the amplitude of part of the frequency domain unit of the low priority beam, which can reflect the characteristics of the frequency domain unit of the combining coefficient more finely and reduce the performance loss of the system. In another implementation, the terminal reports the broadband combining coefficient of the low-priority beam, that is, for each low-priority beam, only one broadband combining coefficient is reported, and there is no need to report the frequency domain unit index or multiple frequencies. Domain unit merging coefficients further reduce the overhead of reporting PMI.

在一种可能的设计中，在所述终端向接入网设备发送PMI之前，还可以执行如下步骤：在每个空间层上，针对第一波束，所述终端从N _SB个频域单元中确定M个频域单元，N _SB为***带宽包含的频域单元数；针对第二波束，所述终端从N _SB个频域单元中确定N个频域单元。 In a possible design, before the terminal sends the PMI to the access network device, the following steps may be performed: on each spatial layer, for the first beam, the terminal selects from N _SB frequency domain units M frequency domain units are determined, and N _SB is the number of frequency domain units included in the system bandwidth; for the second beam, the terminal determines N frequency domain units from the N _SB frequency domain units.

在一种可能的设计中，终端还可以执行如下步骤：在每个空间层上，针对第三波束，所述终端从N _SB个频域单元中确定P个频域单元；针对第四波束，所述终端从N _SB个频域单元中确定P个频域单元，所述第三波束的P个频域单元与所述第四波束的P个频域单元中的每一频域单元分别相同。 In a possible design, the terminal may also perform the following steps: on each spatial layer, for the third beam, the terminal determines P frequency domain units from N _SB frequency domain units; for the fourth beam, The terminal determines P frequency domain units from N _SB frequency domain units, and the P frequency domain units of the third beam and each of the P frequency domain units of the fourth beam are respectively the same .

第二方面，本申请提供一种通信方法，应用在接入网设备或接入网设备中的芯片，该方法包括：接入网设备从终端接收预编码矩阵指示PMI，并根据所述PMI确定在每个空间层上，2L-1个波束各自的合并系数。所述2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束的宽带合并系数。In a second aspect, the present application provides a communication method, which is applied to an access network device or a chip in an access network device. The method includes: the access network device receives a precoding matrix indication PMI from a terminal, and determines according to the PMI On each spatial layer, the respective combining coefficients of the 2L-1 beams. The combining coefficients corresponding to the 2L-1 beams respectively include combining coefficients corresponding to each of the K beams in at least two frequency domain units, and the 2L-1 beams are divided by the K beams The combination coefficients corresponding to at least two frequency domain units of each beam outside each beam, or the respective combination coefficients of the 2L-1 beams include the corresponding corresponding coefficients of at least two frequency domain units of each beam of the K beams The combining coefficient, and the wideband combining coefficient of each beam except the K beams in the 2L-1 beam.

第三方面，本申请提供一种通信装置，该通信装置可以为上述的终端或终端中的芯片。该通信装置包括处理器和收发器。In a third aspect, the present application provides a communication device, which may be the above-mentioned terminal or a chip in the terminal. The communication device includes a processor and a transceiver.

处理器，用于在每个空间层上从2L-1个波束中确定K个波束。收发器，用于向接入网设备发送预编码矩阵指示PMI。The processor is used to determine K beams from 2L-1 beams on each spatial layer. The transceiver is used to send a precoding matrix indication PMI to the access network device.

其中，L、K均为正整数，K<2L-1。可选的，L大于或等于2。所述PMI用于指示在每个空间层上，2L-1个波束各自对应的合并系数，2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元处分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束对应的宽带合并系数。Among them, L and K are positive integers, K<2L-1. Optionally, L is greater than or equal to 2. The PMI is used to indicate, on each spatial layer, the merge coefficients corresponding to the 2L-1 beams respectively, and the merge coefficients corresponding to the 2L-1 beams include each of the K beams in at least two frequency domains The respective merge coefficients at the unit, and the merge coefficients corresponding to each of the 2L-1 beams except the K beams in at least two frequency domain units, or the 2L-1 beams each The corresponding combining coefficients include combining coefficients corresponding to at least two frequency domain units of each beam of the K beams, and broadband combining corresponding to each beam except the K beams of the 2L-1 beam coefficient.

在一种可能的设计中，处理器，还用于，在每个空间层上，针对第一波束，从N _SB个频域单元中确定M个频域单元，N _SB为***带宽包含的频域单元数；针对第二波束，从N _SB个频域单元中确定N个频域单元。 In a possible design, the processor is also used to determine M frequency domain units from N _SB frequency domain units for the first beam on each spatial layer, where N _SB is the frequency included in the system bandwidth Number of domain units; for the second beam, N frequency domain units are determined from N _SB frequency domain units.

在一种可能的设计中，处理器，还用于，在每个空间层上，针对第三波束，从N _SB个频域单元中确定P个频域单元；针对第四波束，从N _SB个频域单元中确定P个频域单元，所述第三波束的P个频域单元与所述第四波束的P个频域单元中的每一频域单元分别相同。 In one possible design, the processor further configured, for the third beam, to determine frequency-domain P N _SB cells from frequency-domain units on each spatial layer; for the fourth beam from N _SB P frequency domain units are determined in each frequency domain unit, and the P frequency domain units of the third beam are the same as each of the P frequency domain units of the fourth beam.

第四方面，本申请提供一种通信装置，该通信装置可以是上述的接入网设备或接入网设备中的芯片，该通信装置包括收发器和处理器。According to a fourth aspect, the present application provides a communication device. The communication device may be the foregoing access network device or a chip in the access network device. The communication device includes a transceiver and a processor.

收发器，用于从终端接收预编码矩阵指示PMI。处理器，用于根据所述收发器接收的PMI确定在每个空间层上2L-1个波束各自对应的合并系数。所述2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束的宽带合并系数。The transceiver is used to receive the precoding matrix indication PMI from the terminal. The processor is configured to determine the merge coefficient corresponding to the 2L-1 beams on each spatial layer according to the PMI received by the transceiver. The combining coefficients corresponding to the 2L-1 beams respectively include combining coefficients corresponding to each of the K beams in at least two frequency domain units, and the 2L-1 beams are divided by the K beams The combination coefficients corresponding to at least two frequency domain units of each beam outside each beam, or the respective combination coefficients of the 2L-1 beams include the corresponding corresponding coefficients of at least two frequency domain units of each beam of the K beams The combining coefficient, and the wideband combining coefficient of each beam except the K beams in the 2L-1 beam.

在上述任一方面的一种可能的设计中，合并系数由幅度系数和相位系数表示；所述幅度系数包括频域单元幅度和宽带幅度；所述相位系数包括频域单元相位和宽带相位。In a possible design of any of the above aspects, the merge coefficient is represented by an amplitude coefficient and a phase coefficient; the amplitude coefficient includes a frequency domain unit amplitude and a broadband amplitude; and the phase coefficient includes a frequency domain unit phase and a broadband phase.

在上述任一方面的一种可能的设计中，所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：在M个频域单元的每一频域单元第一波束分别对应的合并系数，以及在N个频域单元的每一频域单元第二波束分别对应的合并系数，M、N均为大于或等于2的整数；所述M、N的数值相同，且所述第一波束的M个频域单元与所述第二波束的N个频域单元中的每一频域单元分别相同，或者，所述M个频域单元和所述N个频域单元中存在不同的频域单元。In a possible design of any one of the above aspects, the merging coefficients corresponding to at least two frequency domain units of each beam of the K beams include: in each frequency domain unit of the M frequency domain units Merge coefficients corresponding to one beam respectively and Merge coefficients corresponding to the second beam in each frequency domain unit of N frequency domain units, M and N are integers greater than or equal to 2; the values of M and N are the same , And the M frequency domain units of the first beam and each of the N frequency domain units of the second beam are respectively the same, or the M frequency domain units and the N frequency domain units There are different frequency domain units in the domain unit.

所述2L-1个波束中除所述K个波束外的每一波束的宽带合并系数，包括：第三波束的宽带合并系数、第四波束的宽带合并系数。The broadband combining coefficient of each beam except the K beams in the 2L-1 beams includes: a broadband combining coefficient of the third beam and a broadband combining coefficient of the fourth beam.

其中，所述第一波束和所述第二波束为所述K个波束中的任意两个波束，所述第三波束、所述第四波束为所述2L-1波束中除所述K个波束外的任意两个波束。Wherein, the first beam and the second beam are any two of the K beams, and the third beam and the fourth beam are the 2L-1 beams except the K beams Any two beams outside the beam.

在上述任一方面的一种可能的设计中，所述M个频域单元和所述N个频域单元中单个频域单元的索引以及在所述单个频域单元处的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述M个频域单元和所述N个频域单元中的单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线。In a possible design of any one of the above aspects, the index of a single frequency domain unit in the M frequency domain units and the N frequency domain units and the frequency domain of the merge coefficient at the single frequency domain unit The unit amplitude corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship curve between the frequency domain unit index and the frequency domain unit amplitude of the merge coefficient, or the M frequency domain units and the N The index of a single frequency domain unit in each frequency domain unit and the phase of the frequency domain unit of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used to fit the index and merge of the frequency domain unit The relationship curve between the phases of the frequency domain elements of the coefficient.

在上述任一方面的一种可能的设计中，所述PMI包括：每个空间层对应的，在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度，所述N个频域单元的索引、所述第三波束的合并系数的宽带幅度，以及所述第四波束的合并系数的宽带幅度。In a possible design of any one of the above aspects, the PMI includes: corresponding to each spatial layer, in each frequency domain unit of the M frequency domain units, the frequency domain of the combining coefficient of the first beam Unit amplitude, the index of the M frequency domain units, the frequency domain unit amplitude of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units , The broadband amplitude of the combining coefficient of the third beam, and the broadband amplitude of the combining coefficient of the fourth beam.

采用上述终端上报高优先级波束的合并系数的方法，对***性能影响较大的高优先级波束，采用更加精细的上报合并系数的方式，即终端上报波束在频域单元处的合并系数，能够更加精准的反映不同频域单元中的预编码向量，使得预编码向量与该频域单元的信道特征更加匹配，提升预编码结果的准确度。采用上述上报低优先级波束的合并系数的方法，终端上报低优先级波束的宽带合并系数，也就是说，对于每一低优先级波束，仅上报一个宽带合并系数，无需上报频域单元索引，也无需上报多个频域单元合并系数，进一步降低了上报PMI的开销。Using the above method of reporting the combination coefficient of the high-priority beam of the terminal, the high-priority beam that has a greater impact on the system performance adopts a more refined method of reporting the combination coefficient, that is, the terminal reports the combination coefficient of the beam at the frequency domain unit. More accurately reflect the precoding vectors in different frequency domain units, so that the precoding vectors and the channel characteristics of the frequency domain unit are more matched, and the accuracy of the precoding results is improved. Using the above method of reporting the combination coefficient of the low-priority beam, the terminal reports the broadband combination coefficient of the low-priority beam, that is, for each low-priority beam, only one broadband combination coefficient is reported, and there is no need to report the frequency domain unit index. There is no need to report multiple frequency domain unit combination coefficients, which further reduces the overhead of reporting PMI.

在上述任一方面的一种可能的设计中，所述PMI包括：每个空间层对应的，在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位，所述N个频域单元的索引、所述第三波束的合并系数的宽带相位、所述第四波束的合并系数的宽带相位。In a possible design of any one of the above aspects, the PMI includes: corresponding to each spatial layer, in each frequency domain unit of the M frequency domain units, the frequency domain of the combining coefficient of the first beam Unit phase, the index of the M frequency domain units, the frequency domain unit phase of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units , The broadband phase of the combining coefficient of the third beam, and the broadband phase of the combining coefficient of the fourth beam.

在上述任一方面的一种可能的设计中，所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：M个频域单元的每一频域单元第一波束对应的合并系数，以及在N个频域单元的每一频域单元第二波束对应的合并系数。In a possible design of any one of the above aspects, the merging coefficients corresponding to at least two frequency domain units of each beam of the K beams include: each frequency domain unit of the M frequency domain units is first The combining coefficient corresponding to the beam, and the combining coefficient corresponding to the second beam in each frequency domain unit of the N frequency domain units.

所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，包括：在P个频域单元的每一频域单元第三波束对应的合并系数、在所述P个频域单元的每一频域单元第四波束对应的合并系数。In each of the 2L-1 beams except the K beams, the merge coefficients corresponding to at least two frequency domain units respectively include: the third beam corresponding to each frequency domain unit of the P frequency domain units The combining coefficient and the combining coefficient corresponding to the fourth beam in each frequency domain unit of the P frequency domain units.

在上述任一方面的一种可能的设计中，P为大于或等于2的整数；所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线。In a possible design of any of the above aspects, P is an integer greater than or equal to 2; the index of a single frequency domain unit in the P frequency domain units and the frequency domain unit of the merge coefficient of the single frequency domain unit The amplitude corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship curve between the index of the frequency domain unit and the amplitude of the frequency domain unit of the merge coefficient, or a single frequency domain unit among the P frequency domain units And the frequency domain unit phase of the merge coefficient of the single frequency domain unit corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship between the frequency domain unit index and the frequency domain unit phase of the merge coefficient curve.

在上述任一方面的一种可能的设计中，所述PMI包括：每个空间层对应的，在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元幅度、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元幅度，以及所述P个频域单元的索引。In a possible design of any one of the above aspects, the PMI includes: corresponding to each spatial layer, in each frequency domain unit of the M frequency domain units, the frequency domain of the combining coefficient of the first beam Unit amplitude, index of the M frequency domain units, frequency domain unit amplitude of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, index of the N frequency domain units , The frequency domain unit amplitude of the merge coefficient corresponding to the third beam of each frequency domain unit of the P frequency domain units, and the frequency of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units The amplitude of the domain unit and the index of the P frequency domain units.

在上述任一方面的一种可能的设计中，所述PMI包括：每个空间层对应的，在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元相位、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元相位，以及所述P个频域单元的索引。In a possible design of any one of the above aspects, the PMI includes: corresponding to each spatial layer, in each frequency domain unit of the M frequency domain units, the frequency domain of the combining coefficient of the first beam Unit phase, the index of the M frequency domain units, the frequency domain unit phase of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units , The frequency domain unit phase of the merge coefficient corresponding to the third beam of each frequency domain unit of the P frequency domain units, and the frequency of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units The phase of the domain unit and the index of the P frequency domain units.

采用上述终端上报高优先级波束的合并系数的方法，对***性能影响较大的高优先级波束，采用更加精细的上报合并系数的方式，即终端对不同的高优先级波束可以选择不同的频域单元处的合并系数进行上报，能够更加精准的反映不同波束在不同频域单元中的预编码向量，较好反映出不同波束的信道特征，提升预编码结果的准确度。采用上述终端上报低优先级波束的合并系数的方法，对MIMO***性能影响较小的低优先级波束，终端上报相同几个频域单元处的合并系数，并且，对于所有低优先级波束仅指示相同几个频域单元的索引即可，一方面，降低了指示频域单元索引的比特开销，另一方面，相比于现有技术中，对于宽带幅度小的波束，仅上报波束的宽带幅度，本申请实施例中，可以上报低优先级波束的部分频域单元幅度，能够更加精细的反映合并系数在频域单元(比如子带)的特征，减少***性能损失。The method of reporting the combining coefficients of the high-priority beams by the above-mentioned terminal has a greater impact on the system performance of the high-priority beams, and adopts a more refined method of reporting the combining coefficients, that is, the terminal can select different frequencies for different high-priority beams. The combination coefficients at the domain unit are reported, which can more accurately reflect the precoding vectors of different beams in different frequency domain units, better reflect the channel characteristics of different beams, and improve the accuracy of the precoding results. Using the above method of reporting the combining coefficients of low priority beams by the terminal, the low priority beams that have little effect on the performance of the MIMO system, the terminal reports the combining coefficients at the same frequency domain unit, and only indicates for all low priority beams The indexes of the same frequency domain units may be sufficient. On the one hand, the bit overhead indicating the index of the frequency domain unit is reduced. On the other hand, compared with the prior art, for a beam with a small broadband amplitude, only the broadband amplitude of the beam is reported. In the embodiment of the present application, it is possible to report the amplitude of some frequency domain units of low priority beams, which can more accurately reflect the characteristics of the merge coefficients in frequency domain units (such as subbands), and reduce system performance loss.

在上述任一方面的一种可能的设计中，所述K个波束为所述2L-1个波束中合并系数的宽带幅度最大的K个波束，或者，所述K个波束为所述2L-1个波束中合并系数的宽带幅度大于或等于幅度阈值的K个波束。In a possible design of any one of the above aspects, the K beams are the K beams with the largest broadband amplitude of the merging coefficient among the 2L-1 beams, or the K beams are the 2L- K beams in which the broadband amplitude of the combining coefficient in one beam is greater than or equal to the amplitude threshold.

当波束的合并系数的宽带幅度较大时，通常该波束在线性组合中所占权重较高，说明该波束对预编码性能的影响较大，因此，本申请实施例考虑选取对预编码性能影响较大的K个波束作为高优先级波束。When the broadband width of the beam combining coefficient is large, usually the beam has a higher weight in the linear combination, indicating that the beam has a greater influence on the precoding performance. Therefore, the embodiment of the present application considers the influence on the precoding performance. The larger K beams serve as high priority beams.

在上述任一方面的一种可能的设计中，所述K个波束为所述2L-1个波束中插值点的数目最少的K个波束，或者，所述K个波束为所述2L-1个波束中插值点的数目小于或等于插值点数目阈值的K个波束。In a possible design of any one of the above aspects, the K beams are the K beams with the smallest number of interpolation points in the 2L-1 beams, or the K beams are the 2L-1 The number of interpolation points in each beam is less than or equal to the K beams of the threshold of the number of interpolation points.

当波束对应的插值点较少时，终端向基站上报PMI时，对应上报的频域单元索引和频域单元幅度相应较少，终端上报PMI的开销有所降低。在本申请实施例中，K个高优先级波束可以为插值点较少的波束。When there are fewer interpolation points corresponding to the beam, when the terminal reports the PMI to the base station, the frequency domain unit index and the frequency domain unit amplitude corresponding to the report are correspondingly less, and the overhead for the terminal to report the PMI is reduced. In the embodiment of the present application, the K high-priority beams may be beams with fewer interpolation points.

在上述任一方面的一种可能的设计中，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值最大的K个波束；或者，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值大于或等于距离阈值的K个波束。In a possible design of any one of the above aspects, the K beams are K with the largest average difference between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient among the 2L-1 beams Beams; or, the K beams are the K beams in which the average difference between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient in the 2L-1 beams is greater than or equal to the distance threshold.

当波束对应的合并系数的频域单元幅度与波束对应的合并系数的宽带幅度的平均差值较大，说明在不同频域单元中该波束的合并系数的频域单元幅度的差距较大，在频域呈现出较为剧烈的变化。若仅仅上报波束的合并系数的宽带幅度，无法精细地反映该波束在频域的特征，从而导致性能较为严重的损失。在本申请实施例中，将类似的波束，即与合并系数的宽带幅度的平均差值较大的K个波束作为高优先级波束。When the average difference between the amplitude of the frequency domain unit of the merging coefficient corresponding to the beam and the broadband amplitude of the merging coefficient corresponding to the beam is large, it means that the difference of the frequency domain unit amplitude of the merging coefficient of the beam in different frequency domain units is large. The frequency domain exhibits relatively drastic changes. If only the broadband amplitude of the beam combining coefficient is reported, it cannot accurately reflect the characteristics of the beam in the frequency domain, resulting in a serious performance loss. In the embodiment of the present application, similar beams, that is, K beams with a larger average difference from the wideband amplitude of the combining coefficient are used as high-priority beams.

在上述任一方面的一种可能的设计中，用于指示插值点对应的频域单元索引的比特数为

其中，inter为单个波束对应的插值点数目，N _SB为***带宽包含的频域单元数目，num_sb为预设插值点数目。 In a possible design in any of the above aspects, the number of bits used to indicate the frequency domain unit index corresponding to the interpolation point is

Where, inter is the number of interpolation points corresponding to a single beam, N _SB is the number of frequency domain units included in the system bandwidth, and num_sb is the preset number of interpolation points.

预设插值点数目可以预先规定，即预先规定需上报某一个或多个频域单元处的合并系数。可选的，预设插值点数目为2。可选的，若频域单元索引自0开始，则两个预设插值点对应的频域单元索引分别为0和N _SB-1。可选的，若频域单元索引自1开始，则两个预设插值点对应的频域单元索引分别为1和N _SB。下文主要以频域单元为子带为例进行说明，在此统一说明，下文不再赘述。 The preset number of interpolation points may be predetermined, that is, the merge coefficients at one or more frequency domain units need to be reported in advance. Optionally, the preset number of interpolation points is 2. Optionally, if the frequency domain unit index starts from 0, the frequency domain unit indexes corresponding to the two preset interpolation points are 0 and N _SB -1, respectively. Optionally, if the frequency domain unit index starts from 1, the frequency domain unit indexes corresponding to the two preset interpolation points are 1 and N _SB respectively. The following mainly uses the frequency domain unit as a subband as an example for description, and is described here in a unified manner, and is not described in detail below.

比如，以***带宽包括72个RB为例，一个子带包含4个RB，***带宽包含18个子带，预先规定上报第1个子带处的合并系数和第18个子带处的合并系数。如此，参见图5，若终端需上报图5所示的7个子带处的合并系数，则仅需指示除第1子带和第18子带外的子带索引，即指示子带2、4、5、8、13的索引，指示这5个子带的索引使用的比特数目为

降低指示子带索引的比特位开销。 For example, taking the system bandwidth including 72 RBs as an example, one subband includes 4 RBs, and the system bandwidth includes 18 subbands. It is predetermined to report the combining coefficient at the first subband and the combining coefficient at the 18th subband. Thus, referring to FIG. 5, if the terminal needs to report the merge coefficients at the 7 subbands shown in FIG. 5, it only needs to indicate the subband indexes except the first subband and the 18th subband, that is, to indicate

subbands

2 and 4. , 5, 8, 13 indexes, indicating that the number of bits used for the indexes of these 5 subbands is

Reduce the bit overhead of indicating subband index.

在上述任一方面的一种可能的设计中，所述终端从N _SB个子带中确定M个子带，包括：所述终端自第一子带开始，每间隔预设数目的子带选择一个子带，直至确定M个子带，其中，所述M个子带中的最后一个子带为第二子带。 In a possible design of any one of the above aspects, the terminal determining M subbands from N _SB subbands includes: starting from the first subband, the terminal selects one subband every predetermined number of subbands Band until M subbands are determined, wherein the last subband in the M subbands is the second subband.

比如，***带宽包含18个子带，第一子带为子带1，自子带1开始，终端每间隔2个子带，选取一个插值点对应的子带，最后一个子带，即第二子带为子带16，即选取子带1、4、7、10、13、16，并指示这6个子带的索引。或者，在另一种实现方式中，终端仅指示起始子带的索引1和最后一个子带的索引16，基站根据预设的预设数目2，即可获知每间隔2个子带为一个插值点对应的子带，即插值点对应的子带依次为子带1、4、7、10、13、16。For example, the system bandwidth includes 18 subbands. The first subband is subband 1. Starting from subband 1, the terminal selects a subband corresponding to an interpolation point every 2 subbands. The last subband is the second subband. For subband 16, that is,

select subbands

1, 4, 7, 10, 13, 16, and indicate the indexes of these six subbands. Or, in another implementation manner, the terminal only indicates the index 1 of the starting subband and the index 16 of the last subband, and the base station can learn that every two subbands in the interval is an interpolation according to the preset number 2 The sub-bands corresponding to the points, that is, the sub-bands corresponding to the interpolation points are sub-bands 1, 4, 7, 10, 13, 16 in sequence.

在上述任一方面的一种可能的设计中，单个波束的插值点数目为1，所述单个波束的合并系数为所述单个波束的宽带合并系数。In a possible design of any one of the above aspects, the number of interpolation points of a single beam is 1, and the combining coefficient of the single beam is the broadband combining coefficient of the single beam.

第五方面，本申请实施例提供一种通信装置，该装置具有实现上述任一方面中任一项的通信方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。According to a fifth aspect, an embodiment of the present application provides a communication device having a function of implementing the communication method of any one of the above aspects. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

第六方面，提供一种通信装置，包括：处理器和存储器；该存储器用于存储计算机执行指令，当该通信装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该通信装置执行如上述任一方面中任一项的通信方法。According to a sixth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer-executed instructions, and when the communication device is running, the processor executes the computer-executed instructions stored in the memory to enable the communication The device executes the communication method according to any one of the above aspects.

第七方面，提供一种通信装置，包括：处理器；处理器用于与存储器耦合，并读取存储器中的指令之后，根据指令执行如上述任一方面中任一项的通信方法。According to a seventh aspect, a communication device is provided, including: a processor; after being coupled to a memory and reading an instruction in the memory, the processor executes the communication method according to any one of the above aspects according to the instruction.

第八方面，提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述任一方面中任一项的通信方法。In an eighth aspect, a computer-readable storage medium is provided, in which instructions are stored in the computer-readable storage medium, which when run on a computer, enables the computer to execute any of the communication methods of any of the above aspects.

第九方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述任一方面中任一项的通信方法。In a ninth aspect, there is provided a computer program product containing instructions, which when run on a computer, enables the computer to execute any of the communication methods of any of the above aspects.

第十方面，提供一种电路***，电路***包括处理电路，处理电路被配置为执行如上述任一方面中任一项的通信方法。According to a tenth aspect, there is provided a circuit system including a processing circuit configured to perform the communication method according to any one of the above aspects.

第十一方面，提供一种芯片，芯片包括处理器，处理器和存储器耦合，存储器存储有程序指令，当存储器存储的程序指令被处理器执行时实现上述任一方面任意一项的通信方法。According to an eleventh aspect, a chip is provided. The chip includes a processor, and the processor is coupled to a memory. The memory stores program instructions. When the program instructions stored in the memory are executed by the processor, the communication method according to any one of the above aspects is implemented.

第十二方面，提供一种通信***，通信***包括上述各个方面中任一方面中的终端(或终端中的芯片)、任一方面中的接入网设备(或接入网设备中的芯片)。According to a twelfth aspect, a communication system is provided. The communication system includes the terminal (or chip in the terminal) in any one of the above aspects, and the access network device (or chip in the access network device) in any aspect ).

其中，第二方面至第十二方面中任一种设计方式所带来的技术效果可参见第一方面中不同设计方式所带来的技术效果，此处不再赘述。The technical effects brought by any one of the design methods in the second aspect to the twelfth aspect can be referred to the technical effects brought by the different design methods in the first aspect, which will not be repeated here.

附图说明BRIEF DESCRIPTION

图1为本申请实施例提供的通信***的架构示意图；1 is a schematic structural diagram of a communication system provided by an embodiment of this application;

图2为本申请实施例提供的通信设备的架构示意图；2 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

图3为本申请实施例提供的通信方法的流程示意图；3 is a schematic flowchart of a communication method provided by an embodiment of this application;

图4为本申请实施例提供的频域单元与频域单元幅度之间的关系曲线图；4 is a graph of the relationship between the frequency domain unit and the amplitude of the frequency domain unit provided by an embodiment of the present application;

图5为本申请实施例提供的频域单元与频域单元幅度之间的关系曲线图；5 is a graph of the relationship between the frequency domain unit and the amplitude of the frequency domain unit provided by an embodiment of the present application;

图6为本申请实施例提供的通信方法的流程示意图；6 is a schematic flowchart of a communication method provided by an embodiment of this application;

图7为本申请实施例提供的通信装置的结构示意图。7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

具体实施方式detailed description

首先，给出本申请实施例所涉及的技术术语：First, technical terms involved in the embodiments of the present application are given:

1、合并系数：作为一种可能的预编码方式，终端向基站反馈PMI，该PMI指示多个波束向量，并指示每个空间层每个频域单元上所述多个波束向量中每一波束向量对应的合并系数，使得基站根据各波束向量和各波束向量对应的合并系数确定每个空间层每个频域单元对应的下行的预编码向量，进而基站根据预编码向量对发送给该终端的信号进行预编码，以提升***的传输性能。1. Combining coefficients: As a possible precoding method, the terminal feeds back the PMI to the base station, the PMI indicates multiple beam vectors, and indicates each beam in the multiple beam vectors on each frequency domain unit of each spatial layer The combination coefficient corresponding to the vector makes the base station determine the downlink precoding vector corresponding to each frequency domain unit of each spatial layer according to each beam vector and the combination coefficient corresponding to each beam vector, and then the base station sends the precoding vector to the terminal according to the precoding vector The signal is pre-coded to improve the transmission performance of the system.

以空间层数(rank)为1为例，假设基站在水平方向和垂直方向配置有N _1*N ₂个天线、且使用双极化天线阵列，终端根据信道条件或其他策略，在每个极化方向，从预设的N ₁N ₂个正交波束中共选取L个波束，两个极化方向共计2L个波束，相应的，在一个空间层一个频域单元，两个极化方向，还需选择2L个波束各自对应的合并系数。如此，预编码向量可以用各波束的线性组合来表示： Taking the number of spatial layers (rank) as an example, suppose that the base station is equipped with N _{1 *} N ₂ antennas in the horizontal and vertical directions, and uses a dual-polarized antenna array. The terminal according to channel conditions or other strategies, at each pole Polarization direction, a total of L beams are selected from the preset N ₁ N ₂ orthogonal beams, and a total of 2L beams in the two polarization directions. Correspondingly, a frequency domain unit in a space layer, two polarization directions, and It is necessary to select the combining coefficients corresponding to the 2L beams. As such, the precoding vector can be represented by a linear combination of beams:

其中，a _i表示从预设的N ₁N ₂个正交波束中选取的第i个波束(0≤i≤L-1)，b _l,i,k表示第l＝1个空间层，第k个极化方向，选出的第i个正交波束对应的合并系数，合并系数相当于各波束的线性组合中波束的权重。因此，本文中，合并系数有时也称为权重，在此统一说明，下文不再赘述。 Where a _i represents the i-th beam (0≤i≤L-1) selected from the preset N ₁ N ₂ orthogonal beams, b _l,i,k represents the l=1th spatial layer, the k polarization directions, and the merging coefficient corresponding to the selected ith orthogonal beam, the merging coefficient is equivalent to the weight of the beam in the linear combination of each beam. Therefore, in this article, the merging coefficients are sometimes also called weights, which are described here in a unified manner and will not be described in detail below.

在本申请实施例所提及的频域单元可以指子带，即频域单元的带宽与子带带宽相同，或者，频域单元的带宽可以是子带带宽的1/2，或者，频域单元的带宽可以是子带带宽的1/4。当然，随着协议的演进，频域单元还可以是其他粒度的频域资源。The frequency domain unit mentioned in the embodiments of the present application may refer to a subband, that is, the bandwidth of the frequency domain unit is the same as the bandwidth of the subband, or the bandwidth of the frequency domain unit may be 1/2 of the bandwidth of the subband, or, the frequency domain The bandwidth of the unit may be 1/4 of the subband bandwidth. Of course, as the protocol evolves, the frequency domain unit can also be frequency domain resources of other granularities.

需要说明的是，上述合并系数为复数，合并系数可由幅度系数和相位系数表示。幅度系数包括频域单元幅度和宽带幅度，相位系数包括频域单元相位和宽带相位。关于频域单元幅度、宽带幅度、频域单元相位、宽带相位的具体概念，可参见下文。It should be noted that the above-mentioned combination coefficient is a complex number, and the combination coefficient can be represented by an amplitude coefficient and a phase coefficient. The amplitude coefficient includes the frequency domain unit amplitude and the broadband amplitude, and the phase coefficient includes the frequency domain unit phase and the broadband phase. For the specific concepts of frequency domain unit amplitude, broadband amplitude, frequency domain unit phase, and broadband phase, see below.

示例性的，合并系数可以表示为如下的幅度系数和相位系数的形式：Exemplarily, the merge coefficient may be expressed in the form of amplitude coefficient and phase coefficient as follows:

其中，p _l,i,k表示第k个极化方向、第l个空间层(rank)、第i个正交波束对应的合并系数的频域单元幅度，

表示第k个极化方向、第l个空间层(rank)、第i个正交波束对应的合并系数的相位。相应的，终端在向基站上报合并系数时，可以对各个子带的合并系数分别进行量化、上报。以频域单元为子带为例，终端向基站上报波束1对应的合并系数的子带幅度时，用3bit量化波束1在子带1处的子带幅度1，并向基站上报该量化值1，使用3bit量化波束1在子带2处的子带幅度2，并向基站上报该量化值2。 Where p _l,i,k represents the frequency domain unit amplitude of the merge coefficient corresponding to the k-th polarization direction, the l-th spatial layer (rank), and the i-th orthogonal beam,

Represents the phase of the combining coefficient corresponding to the k-th polarization direction, the l-th spatial layer (rank), and the i-th orthogonal beam. Correspondingly, when the terminal reports the combining coefficient to the base station, it can separately quantize and report the combining coefficient of each subband. Taking the frequency domain unit as a subband as an example, when the terminal reports the subband amplitude of the merge coefficient corresponding to beam 1 to the base station, it uses 3 bits to quantize the subband amplitude 1 of the beam 1 at subband 1 and reports the quantization value 1 to the base station , Use 3bit to quantize the subband amplitude 2 of the beam 1 at the subband 2, and report the quantization value 2 to the base station.

在另一示例中，上述p _l,i,k可以用如下公式表示： In another example, the above _pl,i,k can be expressed by the following formula:

其中，

表示第k个极化方向、第l个空间层(rank)、第i个正交波束对应的合并系数的宽带幅度，

表示第k个极化方向、第l个空间层(rank)、第i个正交波束对应的合并系数的频域单元差分幅度。当频域单元为子带时，

表示第k个极化方向、第l个空间层(rank)、第i个正交波束对应的合并系数的子带差分幅度，该子带差分幅度用于表征相对于宽带幅度的偏差量。 among them,

Represents the broadband amplitude of the combining coefficient corresponding to the k-th polarization direction, the l-th spatial layer (rank), and the ith orthogonal beam,

Represents the frequency domain unit differential amplitude of the merge coefficient corresponding to the k-th polarization direction, the l-th spatial layer (rank), and the i-th orthogonal beam. When the frequency domain unit is a subband,

Represents the subband differential amplitude of the merging coefficient corresponding to the k-th polarization direction, the l-th spatial layer (rank), and the ith orthogonal beam. The sub-band differential amplitude is used to characterize the deviation from the broadband amplitude.

相应的，当合并系数的频域单元幅度表示为(3)所示的形式时，以频域单元为子带为例，终端上报波束1对应的合并系数，可以实现为：终端向基站上报波束1对应的合并系数的宽带幅度(使用3bit进行量化)，并向基站上报波束1在子带1处的子带差分幅度(使用1bit进行量化)、波束1在子带2处的子带差分幅度(使用1bit进行量化)。如此，基站根据宽带幅度和子带1处的子带差分幅度，比如，对宽带幅度和子带差分幅度进行相乘，可得到波束1在子带1处的子带幅度的量化值。类似的，基站根据宽带幅度和子带2处的子带差分幅度，可得到波束1在子带2处的子带幅度的量化值。Correspondingly, when the amplitude of the frequency domain unit of the combining coefficient is expressed in the form shown in (3), taking the frequency domain unit as a subband as an example, the terminal reporting the combining coefficient corresponding to beam 1 can be implemented as follows: the terminal reports the beam to the base station The broadband width of the merge coefficient corresponding to 1 (using 3bit for quantization), and reporting the subband differential amplitude of beam 1 at subband 1 (using 1bit for quantization), and the subband differential amplitude of beam 1 at subband 2 to the base station (Use 1bit for quantization). In this way, the base station can obtain the quantized value of the subband amplitude at subband 1 of beam 1 by multiplying the broadband amplitude and the subband differential amplitude at subband 1 by, for example, multiplying the broadband amplitude and the subband differential amplitude. Similarly, the base station can obtain the quantized value of the sub-band amplitude of beam 1 at sub-band 2 according to the broadband amplitude and the sub-band differential amplitude at sub-band 2.

需要说明的是，本申请实施例中，终端向基站上报子带幅度或子带相位，可以按照上述(2)对应的流程，即终端直接对各个子带的子带幅度或子带相位进行量化、上报。当然，终端向基站上报子带幅度或子带相位，还可以按照(3)对应的流程，即终端向基站上报宽带幅度，并且，向基站上报不同子带各自的子带差分幅度，进而基站可以得到在不同子带对应的子带幅度或子带相位的实际量化值。It should be noted that in the embodiment of the present application, the terminal reports the subband amplitude or subband phase to the base station, and the terminal can directly quantize the subband amplitude or subband phase of each subband according to the procedure corresponding to (2) above. 、Report. Of course, when the terminal reports the subband amplitude or the subband phase to the base station, it can also follow the procedure corresponding to (3), that is, the terminal reports the broadband amplitude to the base station, and reports the subband differential amplitude of each subband to the base station, and then the base station can Obtain the actual quantized value of the subband amplitude or subband phase corresponding to different subbands.

并且，本申请实施例中，终端向基站上报子带幅度，其中，子带幅度可以指公式(2)中的子带幅度p _l,i,k，也可以公式(3)中的子带差分幅度

在此统一说明，下文不再赘述。 In addition, in the embodiment of the present application, the terminal reports the subband amplitude to the base station, where the subband amplitude may refer to the subband amplitude p _l,i,k in formula (2) or the subband difference in formula (3) Amplitude

Here, the description is unified, and will not be described in detail below.

类似的，当提及子带相位时，也可以指子带差分相位。Similarly, when referring to the sub-band phase, it can also refer to the sub-band differential phase.

在本申请实施例中，终端在向基站反馈PMI时，会将合并系数的频域单元幅度、宽带幅度、频域单元相位、宽带相位分别进行量化，得到量化后的比特，并上报量化后的合并系数的频域单元幅度、宽带幅度、频域单元相位、宽带相位。In the embodiment of the present application, when feeding back the PMI to the base station, the terminal quantizes the frequency domain unit amplitude, broadband amplitude, frequency domain unit phase, and broadband phase of the merging coefficients separately to obtain quantized bits, and reports the quantized bits Frequency domain unit amplitude, broadband amplitude, frequency domain unit phase, and broadband phase of the merge coefficient.

需要说明的是，在预编码中，可以用向量表示空域上的波束，因此，在本文中，波束向量和波束为同一概念，在提及波束时，可以指的是波束向量，在提及波束向量时，可以指的是波束，这里统一声明，下文不再赘述。当然，本申请实施例涉及的波束向量也可以称为正交空域基向量。It should be noted that in precoding, vectors can be used to represent beams in the airspace. Therefore, in this paper, beam vectors and beams are the same concept. When referring to beams, they can refer to beam vectors. In the case of vectors, it can refer to the beam, which is stated here uniformly and will not be described in detail below. Of course, the beam vectors involved in the embodiments of the present application may also be referred to as orthogonal spatial domain basis vectors.

需要说明的是，本申请实施例中所涉及的合并系数，包括频域单元合并系数和宽带合并系数。如下分别对频域单元合并系数和宽带合并系数进行介绍。It should be noted that the combining coefficients involved in the embodiments of the present application include frequency domain unit combining coefficients and broadband combining coefficients. The frequency domain unit combining coefficient and the broadband combining coefficient are introduced as follows respectively.

2、频域单元合并系数：作为一种可能的实现方式，不同频域单元可能对应不同的信道条件，因此，终端在不同频域单元中传输信号时可使用不同的预编码向量，也就是说，在不同频域单元中，2L个波束可以对应不同的合并系数。举例来说，终端在频域单元1上传输信号时，预编码向量为

终端在频域单元2上传输信号时，预编码向量为

可见，对于两个极化方向相同的2L个波束a ₀至a _L-1，不同频域单元中每一波束均可以对应不同的合并系数，从而不同频域单元可以使用不同的预编码向量。对应某一波束来说，波束在频域单元上对应的合并系数称为频域单元合并系数。比如，本段中，b _1,1,2可称为波束a ₁对应的频域单元合并系数。 2. Frequency domain unit combining coefficient: As a possible implementation, different frequency domain units may correspond to different channel conditions. Therefore, the terminal may use different precoding vectors when transmitting signals in different frequency domain units, that is to say, In different frequency domain units, 2L beams can correspond to different combining coefficients. For example, when the terminal transmits a signal on frequency domain unit 1, the precoding vector is

When the terminal transmits a signal on frequency domain unit 2, the precoding vector is

It can be seen that, for two 2L beams a ₀ to a _L-1 with the same polarization direction, each beam in different frequency domain units can correspond to different combining coefficients, so that different frequency domain units can use different precoding vectors. For a certain beam, the corresponding merge coefficient of the beam in the frequency domain unit is called the frequency domain unit merge coefficient. For example, in this paragraph, b _1,1,2 may be referred to as the frequency domain unit combining coefficients corresponding to beam a ₁ .

需要说明的是，频域单元合并系数可以由频域单元幅度和频域单元相位表示。因此，终端在上报波束的频域单元合并系数时，需上报频域单元幅度的量化值和频域单元相位的量化值。It should be noted that the frequency domain unit merging coefficient may be represented by the frequency domain unit amplitude and frequency domain unit phase. Therefore, the terminal needs to report the quantized value of the amplitude of the frequency domain unit and the quantized value of the phase of the frequency domain unit when reporting the merge coefficient of the frequency domain unit of the beam.

3、合并系数的频域单元幅度：频域单元合并系数的幅度称为合并系数的频域单元幅度，也可以简称为频域单元幅度。3. Frequency domain unit amplitude of merging coefficients: The amplitude of the frequency domain unit merging coefficient is called the frequency domain unit amplitude of the merging coefficients, and may also be simply referred to as the frequency domain unit amplitude.

4、合并系数的频域单元相位：频域单元合并系数的相位称为合并系数的频域单元相位，也可以简称为频域单元相位。4. Frequency domain unit phase of merging coefficients: The phase of the frequency domain unit merging coefficients is called the frequency domain unit phase of the merging coefficients, and may also be simply referred to as the frequency domain unit phase.

5、宽带合并系数：作为一种可能的实现方式，在整个***带宽内，每一频域单元均使用相同的预编码向量，也就是说，对于选取的2L个波束中每一波束来说，波束在每一频域单元对应的合并系数均相同。举例来说，若***带宽包括2个频域单元，终端在频域单元1中传输信号时，对于2L个波束中的某一波束来说，其对应的合并系数，与在频域单元2中传输信号时，该波束对应的合并系数相同。此种情况下，该波束在整个***带宽对应的合并系数称为宽带合并系数。这就意味着，给出某一波束的宽带合并系数，就能获知该波束在***带宽的每一频域单元对应的频域单元合并系数。比如，若***带宽包含2个频域单元(频域单元1和频域单元2)，波束1的宽带合并系数记为系数1，则波束1在频域单元1的频域单元合并系数为系数1，波束1在频域单元2对应的频域单元合并系数同样为系数1。5. Broadband merging coefficient: As a possible implementation, within the entire system bandwidth, each frequency domain unit uses the same precoding vector, that is, for each beam of the selected 2L beams, The beam combining coefficients corresponding to each frequency domain unit are the same. For example, if the system bandwidth includes 2 frequency domain units, when the terminal transmits a signal in frequency domain unit 1, for a beam among 2L beams, the corresponding merge coefficient is the same as that in frequency domain unit 2. When transmitting a signal, the combination coefficient corresponding to the beam is the same. In this case, the combination coefficient of the beam over the entire system bandwidth is called the broadband combination coefficient. This means that given the broadband combining coefficient of a certain beam, the frequency domain unit combining coefficient corresponding to each frequency domain unit of the beam in the system bandwidth can be obtained. For example, if the system bandwidth includes 2 frequency domain units (frequency domain unit 1 and frequency domain unit 2), the broadband combining coefficient of beam 1 is recorded as coefficient 1, then the frequency domain unit combining coefficient of beam 1 in frequency domain unit 1 is the coefficient 1. The combination coefficient of frequency domain unit corresponding to frequency domain unit 2 of beam 1 is also coefficient 1.

在本申请实施例中，宽带合并系数可以由宽带幅度和宽带相位表示。这就意味着，终端在上报波束对应的宽带合并系数时，需上报波束的宽带幅度量化值和宽带相位量化值。In the embodiment of the present application, the broadband combining coefficient may be represented by a broadband amplitude and a broadband phase. This means that the terminal needs to report the broadband amplitude quantization value and broadband phase quantization value of the beam when reporting the broadband combining coefficient corresponding to the beam.

6、合并系数的宽带幅度：宽带合并系数的幅度称为合并系数的宽带幅度，也可以简称为宽带幅度。6. Broadband amplitude of the merging coefficient: the amplitude of the broadband merging coefficient is called the broadband amplitude of the merging coefficient, and may also be simply referred to as the broadband amplitude.

7、合并系数的宽带相位：宽带合并系数的相位称为合并系数的宽带相位，也可以简称为宽带相位。7. The broadband phase of the combining coefficient: the phase of the broadband combining coefficient is called the broadband phase of the combining coefficient, and may also be simply referred to as the broadband phase.

8、参考波束：用于做归一化处理，即需要将单个波束对应的合并系数的幅度或相位相对于参考波束对应的合并系数的幅度或相位做归一化处理，以得到合并系数的相对频域单元幅度、相对宽带幅度、相对频域单元相位和相对宽带相位。8. Reference beam: used for normalization, that is, the amplitude or phase of the merge coefficient corresponding to the single beam needs to be normalized to the amplitude or phase of the merge coefficient corresponding to the reference beam to obtain the relative Frequency domain unit amplitude, relative broadband amplitude, relative frequency domain unit phase and relative broadband phase.

本申请实施例中，在2L个波束中选取一个参考波束，终端向基站上报合并系数时，需上报除参考波束外的其余2L-1个波束各自对应的合并系数。其中，终端上报的合并系数为归一化后的合并系数。也就是说，当终端上报某一波束在频域单元对应的合并系数时，上报该波束对应的相对频域单元幅度和相对频域单元相位，当终端上报某一波束的宽带合并系数时，上报该波束对应的相对宽带幅度和相对宽带相位。In the embodiment of the present application, a reference beam is selected from the 2L beams. When the terminal reports the combining coefficient to the base station, it is necessary to report the combining coefficients corresponding to the other 2L-1 beams except the reference beam. Among them, the merge coefficient reported by the terminal is the normalized merge coefficient. In other words, when the terminal reports the merging coefficient corresponding to a beam in the frequency domain unit, it reports the relative frequency domain unit amplitude and relative frequency domain unit phase corresponding to the beam. When the terminal reports the broadband merging coefficient of a beam, it reports The relative broadband amplitude and relative broadband phase corresponding to the beam.

其中，终端上报合并系数幅度时，参考波束为2L个波束中合并系数的宽带幅度最大的波束。波束j的合并系数的相对频域单元幅度

可用如下公式计算： When the terminal reports the amplitude of the combining coefficient, the reference beam is the beam with the largest broadband amplitude of the combining coefficient among the 2L beams. Relative frequency domain unit amplitude of the combining coefficient of beam j

It can be calculated by the following formula:

其中，

为波束j对应的合并系数的频域单元幅度，

为参考波束对应的合并系数的频域单元幅度。 among them,

Is the frequency domain unit amplitude of the merge coefficient corresponding to beam j,

It is the frequency domain unit amplitude of the merge coefficient corresponding to the reference beam.

类似的，波束j的合并系数的相对宽带幅度

可用如下公式计算： Similarly, the relative broadband amplitude of the combining coefficient of beam j

It can be calculated by the following formula:

其中，

为波束j对应的合并系数的宽带幅度，

为参考波束对应的合并系数的宽带幅度。 among them,

Is the broadband amplitude of the combination coefficient corresponding to beam j,

It is the broadband amplitude of the combination coefficient corresponding to the reference beam.

波束j的合并系数的相对频域单元相位

可用如下公式计算： Relative frequency domain unit phase of the combining coefficient of beam j

It can be calculated by the following formula:

其中，

为波束j对应的合并系数的相对频域单元相位，

为波束j对应的合并系数的频域单元相位，

为参考波束对应的合并系数的频域单元相位。 among them,

Is the relative frequency domain unit phase of the merge coefficient corresponding to beam j,

Is the phase of the frequency domain unit of the merge coefficient corresponding to beam j,

It is the frequency domain unit phase of the merge coefficient corresponding to the reference beam.

波束j的合并系数的相对宽带相位

可用如下公式计算： The relative broadband phase of the combining coefficient of beam j

It can be calculated by the following formula:

其中，

为波束j对应的合并系数的相对宽带相位，

为波束j对应的合并系数的宽带相位，

为参考波束对应的合并系数的宽带相位。 among them,

Is the relative broadband phase of the merge coefficient corresponding to beam j,

Is the broadband phase of the merge coefficient corresponding to beam j,

It is the broadband phase of the combining coefficient corresponding to the reference beam.

本申请的说明书以及附图中的术语“第一”和“第二”等是用于区别不同的对象，或者用于区别对同一对象的不同处理，而不是用于描述对象的特定顺序。此外，本申请的描述中所提到的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、***、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括其他没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。需要说明的是，本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。The terms “first” and “second” in the specification and drawings of the present application are used to distinguish different objects, or to distinguish different treatments of the same object, rather than to describe a specific order of objects. In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units not listed, or optionally also Include other steps or units inherent to these processes, methods, products, or equipment. It should be noted that, in the embodiments of the present application, the words “exemplary” or “for example” are used as examples, illustrations or explanations. Any embodiments or design solutions described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

本申请实施例提供的通信方法可以应用于MIMO***中。具体的，应用在MIMO的预编码过程中。参见图1，为本申请实施例所适用的一种示例性的***架构。该***包括接入网设备、以及与该接入网设备通信的多个终端(例如图1中的终端1至终端6。该通信***还可以包括子***。例如，终端4、终端5、终端6可以组成一个子***，在该子***中，终端4、终端5、终端6之间可相互通信。The communication method provided by the embodiments of the present application can be applied to a MIMO system. Specifically, it is used in the MIMO precoding process. Referring to FIG. 1, it is an exemplary system architecture applicable to the embodiments of the present application. The system includes an access network device, and a plurality of terminals that communicate with the access network device (for example, terminal 1 to terminal 6 in FIG. 1. The communication system may also include a subsystem. For example, terminal 4, terminal 5, terminal 6 can form a subsystem in which the terminal 4, the terminal 5, and the terminal 6 can communicate with each other.

其中，本申请实施例所涉及的接入网设备是一种部署在无线接入网用以提供无线通信功能的装置。接入网设备可包括各种形式的宏基站，微基站(也称为小站)，中继站，发送接收点(Transmission Reception Point，TRP)，下一代网络节点(g Node B，gNB)、连接下一代核心网的演进型节点B(ng evolved Node B，ng-eNB)等，还可以包括无线局域网(wireless local area network，WLAN)接入设备等非第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)***的无线接入网设备。The access network device involved in the embodiments of the present application is a device deployed on a wireless access network to provide wireless communication functions. Access network equipment may include various forms of macro base stations, micro base stations (also called small stations), relay stations, transmission and reception points (Transmission Reception Points (TRP), next-generation network nodes (gNode B, gNB), The evolved Node B (ng-eNB) of the first-generation core network, etc., can also include non-third-generation partnership projects (3rd Generation Partnership Project, such as wireless local area network (WLAN) access equipment), 3GPP) system wireless access network equipment.

可选的，本申请实施例中所涉及到的终端(terminal)可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备；还可以包括用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板型电脑、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、机器类型通信(machine type communication,MTC)终端(terminal)、用户设备(user equipment，UE)，终端(terminal device)、用户终端设备(Customer Premise Equipment，CPE)等。为方便描述，本申请中，上面提到的设备统称为终端。Optionally, the terminals involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem; or Including subscriber units, cellular phones, smart phones, wireless data cards, personal digital assistant (PDA) computers, tablet computers, wireless modems, handheld devices (handheld), laptop computer (laptop computer), machine type communication (machine type communication (MTC) terminal), user equipment (user equipment, UE), terminal (terminal) device, user terminal equipment (CustomerPremiseEquipment , CPE), etc. For convenience of description, in the present application, the devices mentioned above are collectively referred to as terminals.

上述通信***可以应用于目前的长期演进(Long Term Evolution，LTE)或者高级的长期演进(LTE Advanced，LTE-A)***中，也可以应用于目前正在制定的5G网络或者未来的其它网络中，还可以应用在其他无线通信***中，比如无线保真(WIreless-FIdelity，Wi-Fi)、全球互通微波访问(Worldwide Interoperability for Microwave Access，wimax)，以及3GPP相关的其他蜂窝***，本申请实施例对此不作具体限定。其中，在不同的网络中，上述通信***中的接入网设备和终端可能对应不同的名字，本领域技术人员可以理解的是，名字对设备本身不构成限定。The above communication system can be applied to the current Long Term Evolution (LTE) or Advanced Long Term Evolution (LTE-A) system, and can also be applied to the 5G network currently under development or other networks in the future. It can also be applied to other wireless communication systems, such as WIreless-FIdelity (Wi-Fi), Worldwide Interoperability for Microwave Access (wimax), and other cellular systems related to 3GPP. Examples of this application This is not specifically limited. Among them, in different networks, the access network device and the terminal in the above communication system may correspond to different names. Those skilled in the art can understand that the name does not constitute a limitation on the device itself.

可选的，本申请实施例中的终端、接入网设备可通过图2中的通信设备来实现。图2所示为本申请实施例提供的通信设备的硬件结构示意图。该通信设备200包括至少一个处理器201，通信线路202，存储器203以及至少一个收发器204。Optionally, the terminal and the access network device in the embodiments of the present application may be implemented by the communication device in FIG. 2. FIG. 2 is a schematic diagram of a hardware structure of a communication device provided by an embodiment of the present application. The communication device 200 includes at least one processor 201, a communication line 202, a memory 203, and at least one transceiver 204.

处理器201可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。The processor 201 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more of which are used to control the execution of the program program of this application integrated circuit.

通信线路202可包括一通路，在上述组件之间传送信息。The communication line 202 may include a path for transferring information between the above components.

收发器204，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。 Transceiver 204, using any kind of transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .

存储器203可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路202与处理器相连接。存储器也可以和处理器集成在一起。The memory 203 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), or other types of information and instructions that can be stored The dynamic storage device can also be electrically erasable programmable read-only memory (electrically erasable programmable-read-only memory (EEPROM), read-only compact disc (compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Access to any other media, but not limited to this. The memory may exist independently, and is connected to the processor through the communication line 202. The memory can also be integrated with the processor.

其中，存储器203用于存储执行本申请方案的计算机执行指令，并由处理器201来控制执行。处理器201用于执行存储器203中存储的计算机执行指令，从而实现本申请下述实施例提供的通信方法。The memory 203 is used to store computer execution instructions for executing the solution of the present application, and the processor 201 controls execution. The processor 201 is used to execute computer-executed instructions stored in the memory 203, thereby implementing the communication method provided by the following embodiments of the present application.

可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。Optionally, the computer execution instructions in the embodiments of the present application may also be called application program codes, which are not specifically limited in the embodiments of the present application.

在具体实现中，作为一种实施例，处理器201可以包括一个或多个CPU，例如图2中的CPU0和CPU1。In a specific implementation, as an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2.

在具体实现中，作为一种实施例，通信设备200可以包括多个处理器，例如图2中的处理器201和处理器207。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。In a specific implementation, as an embodiment, the communication device 200 may include multiple processors, such as the processor 201 and the processor 207 in FIG. 2. Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

在具体实现中，作为一种实施例，通信设备200还可以包括输出设备205和输入设备206。输出设备205和处理器201通信，可以以多种方式来显示信息。例如，输出设备205可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备206和处理器201通信，可以以多种方式接收用户的输入。例如，输入设备206可以是鼠标、键盘、触摸屏设备或传感设备等。In a specific implementation, as an embodiment, the communication device 200 may further include an output device 205 and an input device 206. The output device 205 communicates with the processor 201 and can display information in various ways. For example, the output device 205 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait. The input device 206 communicates with the processor 201 and can receive user input in various ways. For example, the input device 206 may be a mouse, a keyboard, a touch screen device, or a sensing device.

上述的通信设备200可以是一个通用设备或者是一个专用设备。本申请实施例不限定通信设备200的类型。终端、接入网设备均可以是有图2中类似结构的设备。The above-mentioned communication device 200 may be a general-purpose device or a dedicated device. The embodiment of the present application does not limit the type of the communication device 200. Both the terminal and the access network device may be devices with a similar structure in FIG. 2.

参见图3，本申请实施例提供的通信方法，包括如下步骤：Referring to FIG. 3, the communication method provided by the embodiment of the present application includes the following steps:

S301、终端从码本中选取2L个正交波束。S301. The terminal selects 2L orthogonal beams from the codebook.

其中，码本为预设的正交波束向量的集合。终端从码本中选取2L个波束的具体实现方式，可参见现有技术，本申请实施例对此不再赘述。The codebook is a set of preset orthogonal beam vectors. For a specific implementation manner in which the terminal selects 2L beams from the codebook, reference may be made to the existing technology, and details are not described in this embodiment of the present application.

需要说明的是，本申请实施例所涉及的合并系数上报方法，是以一个空间层粒度为例进行说明的，比如，对于第一个空间层来说，选取2L个波束，对于第二个空间层来说，可以选取与第一空间层相同的2L个波束。或者，随着协议演进，不同空间层可以选取不同的2L个波束。It should be noted that the merge coefficient reporting method involved in the embodiments of the present application is described by taking a spatial layer granularity as an example. For example, for the first spatial layer, 2L beams are selected, and for the second space In terms of layers, the same 2L beams as the first spatial layer can be selected. Or, as the protocol evolves, different 2L beams can be selected for different spatial layers.

S302、对于每一空间层，确定2L个波束中的参考波束。S302. For each spatial layer, determine reference beams among the 2L beams.

需要说明的是，终端向基站上报PMI，PMI包括每个空间层对应的选择的波束的合并系数的幅度量化值和相位量化值，下文主要阐述终端上报合并系数的幅度量化值的过程，终端上报合并系数的相位量化值的过程可以参考上报合并系数的幅度量化值的相关描述，这里统一说明，以下不再赘述。It should be noted that the terminal reports the PMI to the base station, and the PMI includes the amplitude quantization value and the phase quantization value of the combination coefficient of the selected beam corresponding to each spatial layer. The following mainly describes the process of the terminal reporting the amplitude quantization value of the combination coefficient. The terminal reports For the process of merging the phase quantization value of the coefficient, reference may be made to the relevant description for reporting the amplitude quantization value of the merging coefficient, which will be described here in a unified manner, and will not be repeated here.

其中，当终端上报合并系数的幅度时，参考波束为2L个波束中合并系数的宽带幅度最大的波束。When the terminal reports the amplitude of the combining coefficient, the reference beam is the beam with the widest amplitude of the combining coefficient among the 2L beams.

S303、对于每个空间层，终端从2L-1个波束中确定K个波束。S303. For each spatial layer, the terminal determines K beams from 2L-1 beams.

其中，K为正整数，L为正整数。K<2L-1。可选的，L大于或等于2。2L-1个波束为2L个波束中除参考波束外的波束。Among them, K is a positive integer and L is a positive integer. K<2L-1. Optionally, L is greater than or equal to 2. 2L-1 beams are beams other than the reference beam among the 2L beams.

如上文所描述，终端可以对上述2L-1个波束的每一波束对应的合并系数的幅度、相位，以参考波束对应的合并系数的幅度、相位为参照，进行归一化处理，得到归一化后的相对幅度，以及归一化后的相对相位。后续，终端向基站上报PMI时，可以仅上报2L-1个波束的合并系数的相对幅度和相对相位。因此，后文中，当提到合并系数的频域单元幅度时，也可以指合并系数的相对频域单元幅度，当提到合并系数的宽带幅度时，也可以指合并系数的相对宽带幅度，当提到合并系数的频域单元相位时，也可以指合并系数的相对频域单元相位，当提到合并系数的宽带相位时，也可以指合并系数的相对宽带相位。这里统一说明，下文不再赘述。关于合并系数的相对频域单元幅度、相对宽带幅度、相对频域单元相位、相对宽带相位的描述，可参见上文，这里不再赘述。As described above, the terminal may perform normalization processing on the amplitude and phase of the combining coefficient corresponding to each beam of the above 2L-1 beams with reference to the amplitude and phase of the combining coefficient corresponding to the reference beam to obtain the normalization The relative amplitude after normalization and the relative phase after normalization. Subsequently, when the terminal reports the PMI to the base station, it may only report the relative amplitude and relative phase of the combination coefficient of the 2L-1 beams. Therefore, in the following, when referring to the frequency domain unit amplitude of the merging coefficient, it may also refer to the relative frequency domain unit amplitude of the merging coefficient, and when referring to the broadband amplitude of the merging coefficient, it may also refer to the relative broadband amplitude of the merging coefficient. When referring to the frequency domain unit phase of the merge coefficient, it may also refer to the relative frequency domain unit phase of the merge coefficient, and when referring to the broadband phase of the merge coefficient, it may also refer to the relative broadband phase of the merge coefficient. It is explained here in a unified manner, and will not be repeated below. For the description of the relative frequency domain unit amplitude, relative broadband amplitude, relative frequency domain unit phase, and relative broadband phase of the merging coefficients, reference may be made to the above, which will not be repeated here.

在本申请实施例中，对2L-1个波束划分为两个波束集合，即高优先级波束集合和低优先级波束集合。S303中，终端从2L-1个波束中选取的K个波束为高优先级波束集合中的波束。In the embodiment of the present application, the 2L-1 beams are divided into two beam sets, that is, a high priority beam set and a low priority beam set. In S303, the K beams selected by the terminal from the 2L-1 beams are beams in the high priority beam set.

可选的，根据不同的应用场景，采取不同方式灵活选取高优先级的K个波束：Optionally, according to different application scenarios, different methods are used to flexibly select K beams with high priority:

方式1：选取的K个波束为2L-1个波束中合并系数的宽带幅度最大的K个波束，或者，K个波束为2L-1个波束中合并系数的宽带幅度大于或等于幅度阈值的K个波束。示例性的，若2L＝6为例，参考波束为波束1，在除参考波束外的2L-1＝5个波束中，波束2、3、4对应的合并系数的宽带幅度均为

波束5对应的合并系数的宽带幅度为

波束6对应的合并系数的宽带幅度为

若K取值为2，则选取的K＝2个高优先级波束为波束5、6，低优先级波束为波束2、3、4。 Method 1: The selected K beams are the K beams with the largest broadband amplitude of the merging coefficient of the 2L-1 beams, or the K beams are the K with the broadband width of the merging coefficients of the 2L-1 beams greater than or equal to the amplitude threshold Beams. Exemplarily, if 2L=6 is taken as an example, the reference beam is beam 1. Among the 2L-1=5 beams other than the reference beam, the broadband amplitudes of the combining coefficients corresponding to

beams

2, 3, and 4 are all

The broadband amplitude of the combining coefficient corresponding to beam 5 is

The broadband amplitude of the combining coefficient corresponding to beam 6 is

If the value of K is 2, the selected K=2 high priority beams are beams 5, 6 and the low priority beams are

beams

2, 3, 4.

当波束的合并系数的宽带幅度较大时，通常该波束在线性组合中所占权重较高，说明该波束对预编码向量的影响较大，因此，本申请实施例考虑选取对预编码性能影响较大的K个波束作为高优先级波束。When the broadband width of the beam combining coefficient is large, the weight of the beam in the linear combination is usually high, indicating that the beam has a greater influence on the precoding vector. Therefore, the embodiment of the present application considers the influence on the precoding performance. The larger K beams serve as high priority beams.

方式2：K个波束为2L-1个波束中插值点的数目最少的K个波束，或者，K个波束为2L-1个波束中插值点的数目小于或等于插值点数目阈值的K个波束。Method 2: K beams are the K beams with the smallest number of interpolation points in the 2L-1 beams, or K beams are the K beams with the number of interpolation points in the 2L-1 beams less than or equal to the threshold of the number of interpolation points .

在本申请实施例中，合并系数可表示为幅度和相位的形式，并且，可以用幅度-频域单元曲线来表示合并系数的频域单元幅度与频域单元之间的关系，用相位-频域单元曲线表示合并系数的频域单元相位和频域单元之间的关系，从而表示合并系数与频域单元之间的关系。In the embodiment of the present application, the combination coefficient can be expressed in the form of amplitude and phase, and the relationship between the amplitude and frequency domain unit of the combination coefficient can be represented by the amplitude-frequency domain unit curve, and the phase-frequency The domain unit curve represents the relationship between the frequency domain unit phase of the merging coefficient and the frequency domain unit, and thus the relationship between the merging coefficient and the frequency domain unit.

需要说明的是，下文主要以频域单元为子带为例进行说明，在此统一说明，下文不再赘述。参见图4，假设2L＝4，波束1至波束4的合并系数的子带幅度和子带之间的关系曲线图如图所示。其中，波束1为参考波束。对于除参考波束外的某一波束，比如波束2来说，合并系数的子带幅度随子带的变化曲线呈现较好的线性特性，因此，可以考虑仅上报部分子带对应的幅度(如合并系数的子带幅度随子带的变化曲线中，斜率改变较大的点)，并使用线性插值方法，对波束2上报的相邻的插值点通过直线来拟合波束2的理想曲线。理想曲线即波束2在各个频域单元处对应的非量化的理想频域单元幅度和各频域单元之间的关系曲线。具体的，可以根据合并系数的子带幅度随子带的变化的理想曲线的斜率变化趋势，在波束2的理想曲线上选取若干个插值点，并向基站上报这些插值点各自对应的子带索引和量化后的子带幅度。其中，每一插值点由一个频域单元的索引(比如第2个频域单元的频域单元索引为2)和该频域单元对应的合并系数的频域单元幅度确定，每两个相邻插值点用于拟合频域单元索引与合并系数的幅度之间的关系曲线。通过相邻的两个插值点，通过插值算法可以近似得到两个插值点之间各个频域单元处(比如第2个频域单元)对应的频域单元幅度。如此，基站根据接收的一个波束对应的每一频域单元索引和频域单元幅度，通过线性插值方法，得到该波束在全部频域单元对应的频域单元幅度。需要说明的是，终端所上报的某一频域单元对应的频域单元幅度，通常指的是量化后的幅度值，因此，与理想曲线上该频域单元处的频域单元幅度可能不同。比如，针对波束2，终端选取如图4所示的5个插值点，各个插值点对应的频域单元索引分别为频域单元1、频域单元2、频域单元8、频域单元13、频域单元18，终端向基站上报这5个频域单元对应的频域单元幅度。其中，在波束2的理想曲线上，频域单元1处的频域单元幅度为0.48、频域单元2处的频域单元幅度为0.72、频域单元8处的频域单元幅度为0.11、频域单元13处的频域单元幅度为0.27、频域单元18处的频域单元幅度为0.015。在波束2的插值直线上，频域单元1处的频域单元幅度为0.5、频域单元2处的频域单元幅度为

频域单元8处的频域单元幅度为

频域单元13处的频域单元幅度为0.25、频域单元18处的频域单元幅度为0。可见，对于波束2，终端上报的频域单元1、2、8、 13、18处的频域单元幅度，与波束2的理想曲线上频域单元1、2、8、13、18处的频域单元幅度并不完全相同。以终端上报频域单元幅度的量化值为例，可以采用3比特进行插值点频域单元幅度的量化，其中，可选量化值包括

It should be noted that the following mainly uses the frequency domain unit as a subband as an example for description, and is described here in a unified manner, and is not described in detail below. Referring to FIG. 4, assuming 2L=4, the relationship between the subband amplitude and the subband amplitude of the combining coefficient of beam 1 to beam 4 is shown in the figure. Among them, beam 1 is a reference beam. For a beam other than the reference beam, such as beam 2, the variation curve of the subband amplitude of the merging coefficient with the subband exhibits a better linear characteristic. Therefore, it may be considered to report only the amplitude corresponding to some subbands (such as merging) (The point where the slope of the subband amplitude of the coefficient changes with the subband is larger, and the linear interpolation method is used to fit the ideal interpolation curve of beam 2 to the adjacent interpolation point reported by beam 2 through a straight line. The ideal curve is the relationship between the amplitude of the non-quantized ideal frequency domain unit corresponding to beam 2 at each frequency domain unit and each frequency domain unit. Specifically, according to the change trend of the slope of the ideal curve of the sub-band amplitude of the merging coefficient with the change of the sub-band, several interpolation points can be selected on the ideal curve of beam 2, and the corresponding sub-band indexes of these interpolation points can be reported to the base station And the quantized subband amplitude. Each interpolation point is determined by the index of a frequency domain unit (for example, the frequency domain unit index of the second frequency domain unit is 2) and the amplitude of the frequency domain unit of the merge coefficient corresponding to the frequency domain unit. Every two adjacent The interpolation point is used to fit the relationship curve between the frequency domain unit index and the amplitude of the merge coefficient. Through the two adjacent interpolation points, the amplitude of the frequency domain unit corresponding to each frequency domain unit (such as the second frequency domain unit) between the two interpolation points can be approximated by the interpolation algorithm. In this way, the base station obtains the frequency-domain unit amplitudes corresponding to all frequency-domain units of the beam by linear interpolation according to each frequency-domain unit index and frequency-domain unit amplitude corresponding to a received beam. It should be noted that the amplitude of the frequency domain unit corresponding to a frequency domain unit reported by the terminal usually refers to the quantized amplitude value, and therefore, the amplitude of the frequency domain unit at the frequency domain unit on the ideal curve may be different. For example, for beam 2, the terminal selects five interpolation points as shown in FIG. 4, and the frequency domain unit indexes corresponding to each interpolation point are frequency domain unit 1, frequency domain unit 2, frequency domain unit 8, frequency domain unit 13, In the frequency domain unit 18, the terminal reports the amplitude of the frequency domain unit corresponding to the five frequency domain units to the base station. Among them, on the ideal curve of beam 2, the frequency domain unit amplitude at frequency domain unit 1 is 0.48, the frequency domain unit amplitude at frequency domain unit 2 is 0.72, and the frequency domain unit amplitude at frequency domain unit 8 is 0.11. The amplitude of the frequency domain unit at the domain unit 13 is 0.27, and the amplitude of the frequency domain unit at the frequency domain unit 18 is 0.015. On the interpolation line of beam 2, the amplitude of the frequency domain unit at frequency domain unit 1 is 0.5, and the amplitude of the frequency domain unit at frequency domain unit 2 is

The amplitude of the frequency domain unit at frequency domain unit 8 is

The amplitude of the frequency domain unit at the frequency domain unit 13 is 0.25, and the amplitude of the frequency domain unit at the frequency domain unit 18 is 0. It can be seen that for beam 2, the amplitude of the frequency domain unit reported by the terminal at the

frequency domain unit

1, 2, 8, 13, 18, and the frequency at the

frequency domain unit

1, 2, 8, 13, 18 on the ideal curve of beam 2 Domain unit amplitudes are not exactly the same. Taking the quantization value of the frequency domain unit amplitude reported by the terminal as an example, 3 bits can be used to quantize the amplitude of the frequency domain unit at the interpolation point.

仍参见图4，拟合波束2的关系曲线所使用的插值点个数为5，各插值点对应的频域单元索引分别为频域单元1、2、8、13、18，拟合波束3的关系曲线所使用的插值点个数为7，各插值点对应的频域单元索引分别为频域单元1、3、4、5、14、17、18，拟合波束4的关系曲线所使用的插值点个数为6，各插值点对应的频域单元索引分别为频域单元1、4、8、12、16、18。若K＝2，则选取插值点个数最少的K＝2个波束，即波束2、波束4作为高优先级波束，波束3作为低优先级波束。Still referring to FIG. 4, the number of interpolation points used for fitting the relationship curve of beam 2 is 5, and the index of the frequency domain unit corresponding to each interpolation point is

frequency domain unit

1, 2, 8, 13, 18, and fitting beam 3 The number of interpolation points used in the relationship curve of is 7, and the index of the frequency domain unit corresponding to each interpolation point is the

frequency domain unit

1, 3, 4, 5, 14, 17, 18, which is used to fit the relationship curve of beam 4. The number of interpolation points is 6, and the index of the frequency domain unit corresponding to each interpolation point is

frequency domain unit

1, 4, 8, 12, 16, 18, respectively. If K=2, K=2 beams with the least number of interpolation points are selected, that is, beam 2 and beam 4 are used as high-priority beams, and beam 3 is used as a low-priority beam.

又例如，例如第2L个波束对应的插值点数目为Mj，2L-1＝5，当{M ₁,M ₂,M ₃,M ₄,M ₅}＝{4,2,5,3,6}，预设插值点数目阈值为4，则选取K＝3个波束分别为波束1，波束2和波束4。 For another example, for example, the number of interpolation points corresponding to the 2Lth beam is Mj, 2L-1=5, when {M ₁ ,M ₂ ,M ₃ ,M ₄ ,M ₅ }={4,2,5,3,6 }, the preset threshold of the number of interpolation points is 4, then K=3 beams are selected as beam 1, beam 2 and beam 4, respectively.

方式3：K个波束为2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值最大的K个波束；或者，K个波束为2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值大于或等于距离阈值的K个波束。Manner 3: K beams are 2L-1 beams, K beams with the largest average difference between the frequency domain unit amplitude of the merge coefficient and the broadband amplitude of the merge coefficient; or, the K beams are 2L-1 beams In, the average difference between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient is greater than or equal to the K beams of the distance threshold.

其中，如上文所描述，合并系数的频域单元幅度可以指合并系数的相对频域单元幅度

合并系数的宽带幅度可以指合并系数的相对宽带幅度

Where, as described above, the frequency domain unit amplitude of the merging coefficient may refer to the relative frequency domain unit amplitude of the merging coefficient

The broadband width of the merging coefficient can refer to the relative broadband width of the merging coefficient

对于波束J，可用如下公式计算平均差值：For beam J, the following formula can be used to calculate the average difference:

其中，N _SB为***带宽包含的频域单元数目，||||是求取绝对值的符号，n表示第n个频域单元。 Among them, N _SB is the number of frequency domain units included in the system bandwidth, |||| is the symbol for obtaining the absolute value, and n represents the nth frequency domain unit.

作为一个示例，2L＝4，在除参考波束外的2L-1＝3个波束中，波束2的平均差值为3，波束3的平均差值为2，波束4的平均差值为1，若K取值为2，则终端选取波束2和波束3作为高优先级波束。As an example, 2L=4. Among the 2L-1=3 beams except the reference beam, the average difference of beam 2 is 3, the average difference of beam 3 is 2, and the average difference of beam 4 is 1. If the value of K is 2, the terminal selects beam 2 and beam 3 as high-priority beams.

当然，终端还可以选取合并系数的频域单元幅度和宽带幅度之间偏差较大的波束作为高优先级波束。比如，计算宽带幅度与每一频域单元幅度之间的方差：Of course, the terminal may also select a beam with a large deviation between the frequency domain unit amplitude of the combining coefficient and the broadband amplitude as the high priority beam. For example, to calculate the variance between the broadband amplitude and the amplitude of each frequency domain unit:

其中，

为合并系数的宽带幅度，

为合并系数的频域单元幅度，N _SB为***带宽包含的频域单元数目。 among them,

Is the broadband amplitude of the combination coefficient,

For the frequency domain unit amplitude of the combining coefficient, N _SB is the number of frequency domain units included in the system bandwidth.

或者，终端可采用其他方式计算频域单元幅度与宽带幅度之间的偏差程度，选取偏差程度较大的K个波束作为高优先级波束。Alternatively, the terminal may calculate the degree of deviation between the amplitude of the frequency domain unit and the amplitude of the broadband in other ways, and select K beams with a larger degree of deviation as high-priority beams.

当波束对应的合并系数的频域单元幅度与波束对应的合并系数的宽带幅度的平均差值较大，说明在不同频域单元中该波束的合并系数的频域单元幅度的差距较大，在本申请实施例中，将类似的波束，即平均差值较大的K个波束作为高优先级波束。When the average difference between the amplitude of the frequency domain unit of the merging coefficient corresponding to the beam and the broadband amplitude of the merging coefficient corresponding to the beam is large, it means that the difference of the frequency domain unit amplitude of the merging coefficient of the beam in different frequency domain units is large. In the embodiment of the present application, similar beams, that is, K beams with a large average difference are used as high-priority beams.

当然，终端还可以结合上述方式1、方式2、方式3中的任意两个或三个选取K个波束。比如，K＝4，终端选取合并系数的宽带幅度最大的2个波束，以及插值点最少的2个波束作为K个高优先级波束。或者，K＝4，终端选取合并系数的宽带幅度最大、且插值点数目较少的4个波束作为高优先级波束，也就是，终端综合考虑宽带幅度和插值点数目两个因素。Of course, the terminal may also select K beams in combination with any two or three of the above manner 1, manner 2, and manner 3. For example, if K=4, the terminal selects the two beams with the largest broadband amplitude of the combination coefficient and the two beams with the least interpolation points as the K high-priority beams. Or, K=4, the terminal selects the 4 beams with the largest broadband amplitude of the merging coefficient and the fewer number of interpolation points as high-priority beams, that is, the terminal comprehensively considers the two factors of broadband amplitude and number of interpolation points.

当然，终端还可以采用其他方式选取K个波束，本申请实施例在此不一一列举。Of course, the terminal may also select K beams in other ways, which are not enumerated here in the embodiments of the present application.

可选的，终端向基站指示所选取的K个波束。其中，指示K个波束所使用的比特数目为

Optionally, the terminal indicates the selected K beams to the base station. Among them, the number of bits used to indicate the K beams is

S304、终端确定2L个波束各自对应的合并系数。S304. The terminal determines the merging coefficient corresponding to each of the 2L beams.

示例性的，终端在一个空间层、一个频域单元、两个极化方向，确定2L个波束之后，还需选择2L个波束各自对应的合并系数。其中，终端选择2L个波束各自对应的合并系数的流程，可参见现有技术，这里不再赘述。Exemplarily, after the terminal determines 2L beams in one space layer, one frequency domain unit, and two polarization directions, it is also necessary to select a combination coefficient corresponding to each 2L beam. For the process of the terminal selecting the combination coefficients corresponding to the 2L beams, reference may be made to the prior art, which will not be repeated here.

S305、终端向接入网设备发送预编码矩阵指示PMI。S305. The terminal sends a precoding matrix indication PMI to the access network device.

相应的，接入网设备从终端接收PMI。Correspondingly, the access network device receives the PMI from the terminal.

其中，PMI用于指示每一空间层(rank)2L-1个波束各自对应的合并系数。2L-1个波束各自对应的合并系数包括K个高优先级波束各自对应的合并系数和2L-1-K个低优先级波束各自对应的合并系数。需要说明的是，由于高优先级波束对***性能的影响较大，因此，终端上报高优先级波束的合并系数的方式可以不同于上报低优先级波束的合并系数的方式。Among them, PMI is used to indicate the merger coefficient corresponding to each spatial layer (rank) 2L-1 beams. The combining coefficients corresponding to the 2L-1 beams include the combining coefficients corresponding to the K high-priority beams and the combining coefficients corresponding to the 2L-1-K low priority beams. It should be noted that, because the high-priority beam has a great influence on the system performance, the way in which the terminal reports the combining coefficient of the high-priority beam may be different from the way of reporting the combining coefficient of the low-priority beam.

具体的，对于K个高优先级波束，终端在上报K个波束各自对应的合并系数时，上报每一波束在两个或两个以上频域单元分别对应的合并系数。Specifically, for the K high-priority beams, when reporting the combining coefficients corresponding to the K beams, the terminal reports the combining coefficients corresponding to each beam in two or more frequency domain units.

以K个波束中的第一波束和第二波束为例，来说明终端上报高优先级波束的合并系数的方式。终端在上报第一波束的合并系数时，从***带宽包含的N _SB个频域单元中选取第一波束对应的M个频域单元，终端上报M个频域单元中每一频域单元第一波束分别对应的合并系数。终端在上报第二波束的合并系数时，终端从N _SB个频域单元中选取第二波束对应的N个频域单元，终端上报N个频域单元中每一频域单元第二波束分别对应的合并系数。相应的，S305具体实现为：终端向接入网设备发送PMI，PMI包括：M个频域单元的索引、第一波束在M个频域单元中每一频域单元处的频域单元幅度、N个频域单元的索引、第二波束在N个频域单元中每一频域单元处的频域单元幅度。 Taking the first beam and the second beam of the K beams as an example, the method for the terminal to report the combining coefficient of the high-priority beam is described. When reporting the combining coefficient of the first beam, the terminal selects M frequency domain units corresponding to the first beam from the N _SB frequency domain units included in the system bandwidth, and the terminal reports the first of each frequency domain unit among the M frequency domain units Combination coefficients corresponding to beams. When the terminal reports the combining coefficient of the second beam, the terminal selects N frequency domain units corresponding to the second beam from N _SB frequency domain units, and the terminal reports that the second beam of each frequency domain unit corresponds to Of the merger coefficient. Correspondingly, S305 is specifically implemented as follows: the terminal sends a PMI to the access network device, the PMI includes: the index of M frequency domain units, the frequency domain unit amplitude of the first beam at each frequency domain unit among the M frequency domain units, The index of the N frequency domain units and the frequency domain unit amplitude of the second beam at each frequency domain unit in the N frequency domain units.

其中，M、N均为大于或等于2的整数，M<N _SB，且N<N _SB；M、N的数值相同，且第一波束的M个频域单元与第二波束的N个频域单元中的每一频域单元分别相同，或者，M个频域单元和N个频域单元中存在不同的频域单元。这里，第一波束、第二波束为K个波束中的任意两个波束。 Where M and N are integers greater than or equal to 2, M<N _SB and N<N _SB ; M and N have the same value, and the M frequency domain units of the first beam and the N frequencies of the second beam Each frequency domain unit in the domain unit is the same, or there are different frequency domain units in the M frequency domain units and the N frequency domain units. Here, the first beam and the second beam are any two beams among the K beams.

以频域单元为子带为例进行说明，参见图4，为M个子带和N个子带中存在不同子带的情况。可选的，M、N的数值可能不同。比如，图4中，波束2的插值点数目为5，各插值点对应的子带索引依次为子带1、子带2、子带8、子带13、子带18，波束3的插值点个数为7，各插值点对应的子带分别为子带1、3、4、5、14、17、18。相应的，终端向基站指示波束2和波束3的合并系数，具体实现为：终端向基站发送PMI，PMI包括波束2对应的5个子带的索引(即子带1、子带2、子带8、子带13、子带18的量化值)、5个子带处的子带幅度、波束3对应的7个子带的索引，以及7个子带处的子带幅度。当然，M、N的数值也可能相同。比如第一波束，其插值点个数为3，各插值点对应的子带分别为子带1、2、3，对于第二波束，插值点个数也为3，但各插值点对应的子带分别为子带4、5、6。相应的，终端向基站指示第一波束和第二波束的合并系数，具体实现为：终端向基站发送PMI，PMI包括第一波束对应的3个子带的索引(即子带1、子带2、子带3的量化值)、3个子带处的子带幅度、第二波束对应的3个子带的索引，以及3个子带处的子带幅度。Taking the frequency domain unit as a subband as an example for description, referring to FIG. 4, it is a case where there are different subbands in the M subbands and the N subbands. Optionally, the values of M and N may be different. For example, in FIG. 4, the number of interpolation points of beam 2 is 5, and the subband indexes corresponding to each interpolation point are subband 1, subband 2, subband 8, subband 13, subband 18, and interpolation point of beam 3 The number is 7, and the sub-bands corresponding to each interpolation point are sub-bands 1, 3, 4, 5, 14, 17, 18, respectively. Correspondingly, the terminal indicates the combination coefficients of beam 2 and beam 3 to the base station. The specific implementation is that the terminal sends a PMI to the base station, and the PMI includes the indexes of the 5 subbands corresponding to beam 2 (that is, subband 1, subband 2, subband 8 , Quantized values of subband 13, subband 18), the subband amplitude at 5 subbands, the index of 7 subbands corresponding to beam 3, and the subband amplitude at 7 subbands. Of course, the values of M and N may also be the same. For example, in the first beam, the number of interpolation points is 3, and the subbands corresponding to each interpolation point are subbands 1, 2, 3, respectively. For the second beam, the number of interpolation points is also 3, but the subpoints corresponding to each interpolation point The bands are sub-bands 4, 5, and 6, respectively. Correspondingly, the terminal indicates the combination coefficient of the first beam and the second beam to the base station. The specific implementation is that the terminal sends a PMI to the base station, and the PMI includes the indexes of the three subbands corresponding to the first beam (that is, subband 1, subband 2, Quantization value of subband 3), the subband amplitude at 3 subbands, the index of 3 subbands corresponding to the second beam, and the subband amplitude at 3 subbands.

可选的，在本申请实施例中，用于指示某个波束选择的插值点对应的频域单元索引的比特数为

可选的，若多个波束需上报不同频域单元索引处对应的合并系数，则针对每一波束，终端均需上报该波束的插值点对应的频域单元索引。若多个波束上报相同几个频域单元索引处的合并系数，则终端需上报共同的几个插值点对应的频域单元索引。 Optionally, in the embodiment of the present application, the number of bits of the frequency domain unit index corresponding to the interpolation point used to indicate a beam selection is

Optionally, if multiple beams need to report the corresponding merge coefficients at different frequency domain unit indexes, for each beam, the terminal needs to report the frequency domain unit index corresponding to the interpolation point of the beam. If multiple beams report the merge coefficient at the same frequency domain unit index, the terminal needs to report the frequency domain unit index corresponding to several common interpolation points.

其中，inter为单个波束对应的插值点数目，N _SB为***带宽包含的频域单元数目，num_sb为预设插值点数目，

为从N _SB-num_sb个元素中取出inter-num_sb个元素的组合公式，Ceiling[]表示向上取整运算。预设插值点数目可以预先规定，即预先规定需上报某一个或多个频域单元对应的合并系数。以频域单元为子带为例进行说明。比如，以***带宽包括72个RB为例，一个子带包含4个RB，***带宽包含18个子带，预先规定上报第1个子带对应的合并系数和第18个子带对应的合并系数。如此，参见图5，若终端需上报图5所示的7个子带对应的合并系数，则仅需指示除第1子带和第18子带外的子带索引，即指示子带2、4、5、8、13的索引，指示这5个子带的索引使用的比特数目为

降低指示子带索引的比特位开销。 Where inter is the number of interpolation points corresponding to a single beam, N _SB is the number of frequency domain units included in the system bandwidth, and num_sb is the number of preset interpolation points,

In order to extract the combination formula of inter-num_sb elements from N _SB -num_sb elements, Ceiling[] means rounding up. The number of preset interpolation points may be predetermined, that is, the merge coefficient corresponding to one or more frequency domain units needs to be reported in advance. The frequency domain unit is taken as an example for description. For example, taking the system bandwidth including 72 RBs as an example, one subband includes 4 RBs, and the system bandwidth includes 18 subbands. It is predetermined to report the merge coefficient corresponding to the first subband and the merge coefficient corresponding to the 18th subband. Thus, referring to FIG. 5, if the terminal needs to report the merge coefficients corresponding to the 7 subbands shown in FIG. 5, it only needs to indicate the subband indexes except the first subband and the 18th subband, that is, to indicate

subbands

Reduce the bit overhead of indicating subband index.

可选的，终端确定用于拟合频域单元索引和频域单元幅度的关系曲线的插值点以及确定插值点对应的频域单元索引，可以是，终端自第一频域单元开始，每间隔预设数目的频域单元选择一个频域单元，并且，所选的最后一个频域单元为第二频域单元。比如，***带宽包含18个频域单元，终端每间隔2个频域单元，选取一个插值点对应的频域单元索引，起始频域单元，即第一频域单元为频域单元1，最后一个频域单元，即第二频域单元为频域单元16，即选取频域单元1、4、7、10、13、16，并指示这6个频域单元的索引。或者，在另一种实现方式中，终端仅指示起始频域单元的索引1和最后一个频域单元的索引16，基站根据预设的预设数目2，即可获知每间隔2个频域单元为一个插值点对应的频域单元，即插值点对应的频域单元依次为频域单元1、4、7、10、13、16。当然，作为另一种实现方式，终端还可以在PMI中包含指示位，用于指示起始频域单元的索引1和最后一个频域单元的索引16，并且指示选取频域单元时所使用的间隔(比如指示每间隔2个频域单元选取一个插值点对应的频域单元)。或者，在另一种实现方式中，终端在PMI中包含指示位，用于指示起始频域单元的索引1，以及指示间隔(比如2)，以及指示选取的频域单元索引的个数(比如6)，则基站根据指示位可确定插值点对应的频域单元依次为频域单元1、4、7、10、13、16。Optionally, the terminal determines the interpolation point used to fit the relationship curve between the frequency domain unit index and the frequency domain unit amplitude, and determines the frequency domain unit index corresponding to the interpolation point. The terminal may start from the first frequency domain unit every interval The preset number of frequency domain units selects one frequency domain unit, and the last selected frequency domain unit is the second frequency domain unit. For example, the system bandwidth includes 18 frequency domain units. The terminal selects a frequency domain unit index corresponding to an interpolation point every 2 frequency domain units. The starting frequency domain unit, that is, the first frequency domain unit is frequency domain unit 1, and the last One frequency domain unit, that is, the second frequency domain unit is the frequency domain unit 16, that is, the

frequency domain units

1, 4, 7, 10, 13, 16 are selected, and the indexes of the six frequency domain units are indicated. Or, in another implementation manner, the terminal only indicates the index 1 of the start frequency domain unit and the index 16 of the last frequency domain unit, and the base station can learn 2 frequency domains at intervals according to the preset preset number 2 The unit is a frequency domain unit corresponding to an interpolation point, that is, the frequency domain unit corresponding to the interpolation point is the

frequency domain unit

1, 4, 7, 10, 13, 16 in sequence. Of course, as another implementation, the terminal may also include an indication bit in the PMI, which is used to indicate the index 1 of the start frequency domain unit and the index 16 of the last frequency domain unit, and indicate the index used when selecting the frequency domain unit. Interval (for example, indicating that every two frequency domain units are selected to select a frequency domain unit corresponding to an interpolation point). Or, in another implementation, the terminal includes an indicator bit in the PMI, which is used to indicate the index 1 of the starting frequency domain unit, and the indication interval (such as 2), and the number of selected frequency domain unit indexes ( For example, 6), the base station may determine that the frequency domain unit corresponding to the interpolation point is the

frequency domain unit

1, 4, 7, 10, 13, 16 according to the indication bit.

当然，终端还可以采取其他方式确定波束的插值点，比如，选取拟合程度最契合的几个插值点作为线性插值的插值点。或者，终端采取其他方式确定插值点，本申请实施例对此不进行限制。Of course, the terminal may also determine the interpolation point of the beam in other ways, for example, selecting several interpolation points that best fit the degree of interpolation as the interpolation points of the linear interpolation. Or, the terminal determines the interpolation point in other ways, which is not limited in the embodiment of the present application.

以频域单元为子带为例进行说明，参见图5，为M、N的数值相同，且第一波束的M个子带与第二波束的N个子带中的每一子带分别相同的情况。也就是说，对于全部高优先级波束，终端上报相同几个子带处的合并系数。比如，在图5中，假设2L＝4，参考波束为波束1，波束2至波束4中，波束2和波束3为高优先级波束。对于高优先级的波束2和波束3，终端选取子带1、2、4、5、8、12、13、18。相应的，终端向基站指示波束2和波束3对应的合并系数，具体可以实现为：终端向基站发送PMI，PMI包括子带1、2、4、5、8、13、18的索引、波束2在各所选子带处对应的子带幅度，以及波束3在各所选子带处对应的子带幅度。如此，对于K个高优先级波束，终端仅上报相同的M(或N)个子带索引即可，降低上报PMI的开销。Taking the frequency domain unit as a subband as an example for description, referring to FIG. 5, the values of M and N are the same, and each of the M subbands of the first beam and the N subbands of the second beam are respectively the same . In other words, for all high-priority beams, the terminal reports the combining coefficients at the same subbands. For example, in FIG. 5, assuming 2L=4, the reference beam is beam 1, beam 2 to beam 4, beam 2 and beam 3 are high priority beams. For high-priority beam 2 and beam 3, the terminal selects

subbands

1, 2, 4, 5, 8, 12, 13, and 18. Correspondingly, the terminal indicates the combination coefficients corresponding to beam 2 and beam 3 to the base station, which can be specifically implemented as follows: the terminal sends a PMI to the base station, and the PMI includes indexes of

subbands

1, 2, 4, 5, 8, 13, 18, and beam 2 The corresponding subband amplitude at each selected subband, and the corresponding subband amplitude of beam 3 at each selected subband. In this way, for the K high-priority beams, the terminal only needs to report the same M (or N) subband indexes, which reduces the overhead of reporting the PMI.

采用上述终端上报高优先级波束的合并系数的方法，对***性能影响较大的高优先级波束，采用更加精细的上报合并系数的方式，即终端上报波束在子带处的合并系数，能够更加精准的反映不同子带中的预编码向量，提升预编码结果的准确度。Using the above method of reporting the combination coefficient of the high-priority beam of the terminal, the high-priority beam that has a greater impact on the system performance adopts a more refined method of reporting the combination coefficient, that is, the terminal reports the combination coefficient of the beam at the subband, which can be more Precisely reflect the precoding vectors in different subbands, improving the accuracy of the precoding results.

值得注意的是，本申请实施例中，终端上报子带幅度，可以指终端上报实际的子带幅度，也可以指终端通过上报宽带幅度、子带差分幅度来指示实际的子带幅度，其中，实际的子带幅度可以表示为公式(3)的形式。类似的，终端上报子带相位，可以指终端上报实际的子带相位，也可以指终端通过上报宽带相位、子带差分相位来指示实际的子带相位。It is worth noting that in the embodiment of the present application, the terminal reports the subband amplitude, which may refer to the actual subband amplitude reported by the terminal, or may indicate that the terminal indicates the actual subband amplitude by reporting the broadband amplitude and the subband differential amplitude, where, The actual subband amplitude can be expressed in the form of formula (3). Similarly, the terminal reporting the subband phase may refer to the terminal reporting the actual subband phase, or it may indicate that the terminal indicates the actual subband phase by reporting the broadband phase and the subband differential phase.

如下对终端上报低优先级波束的合并系数的方式进行说明。The method of reporting the combining coefficient of the low-priority beam by the terminal is described as follows.

可选的，对于低优先级波束，终端上报某一波束的合并系数时，上报该波束在两个或两个以上频域单元分别对应的合并系数。Optionally, for a low-priority beam, when the terminal reports the combining coefficient of a certain beam, it reports the combining coefficients corresponding to the beam in two or more frequency domain units, respectively.

以低优先级波束中的任意两个波束，比如第三波束和第四波束为例，终端在N _SB个频域单元中选择P个频域单元。终端上报第三波束的系数时，上报第三波束在P个频域单元中各频域单元处的合并系数。终端上报第四波束的系数时，上报第四波束在P个频域单元中各频域单元处的合并系数。其中，P为大于或等于2的整数。可选的，P<M，且P<N。也就是说，终端为全部低优先级波束选择相同的P个频域单元，并上报低优先级波束在所需频域单元处的合并系数。以频域单元为子带为例进行说明，比如，参见图5，假设波束3、4为低优先级波束，终端选取的P个子带为子带1、2、4、5、8、12、13、18。相应的，终端向基站发送波束3、4的合并系数，具体可以实现为：终端向基站发送PMI，PMI包括子带1、2、4、5、8、12、13、18的索引、波束3在各子带处的子带幅度，以及波束4在各子带处的子带幅度。 Taking any two beams in the low priority beam, such as the third beam and the fourth beam as an example, the terminal selects P frequency domain units among N _SB frequency domain units. When the terminal reports the coefficient of the third beam, it reports the combination coefficient of the third beam at each frequency domain unit among the P frequency domain units. When the terminal reports the coefficient of the fourth beam, it reports the combination coefficient of the fourth beam at each frequency domain unit in the P frequency domain units. Among them, P is an integer greater than or equal to 2. Optional, P<M, and P<N. In other words, the terminal selects the same P frequency domain units for all low priority beams, and reports the combining coefficient of the low priority beams at the required frequency domain unit. Taking the frequency domain unit as a subband as an example, for example, referring to FIG. 5, assuming that beams 3 and 4 are low-priority beams, the P subbands selected by the terminal are subbands 1, 2, 4, 5, 8, 12, 13, 18. Correspondingly, the terminal sends the combining coefficients of beams 3 and 4 to the base station, which can be specifically implemented as follows: the terminal sends the PMI to the base station, the PMI includes the indexes of

subbands

1, 2, 4, 5, 8, 12, 13, 18, and beam 3 The subband amplitude at each subband, and the subband amplitude of beam 4 at each subband.

可选的，对于低优先级波束，终端上报某一波束的合并系数时，上报该波束的宽带合并系数，即该波束在N _SB个子带的每一子带处的子带幅度均相同。仍以低优先级波束中的任意两个波束，比如第三波束和第四波束为例，终端向基站指示第三波束和第四波束的合并系数，可以实现为：终端向基站发送PMI，PMI包括第三波束的合并系数的宽带幅度，以及第四波束的合并系数的宽带幅度。 Optionally, for a low-priority beam, when the terminal reports the combining coefficient of a certain beam, the broadband combining coefficient of the beam is reported, that is, the subband amplitude of the beam at each subband of the N _SB subbands is the same. Still taking any two of the low priority beams, such as the third beam and the fourth beam as an example, the terminal indicates the combination coefficient of the third beam and the fourth beam to the base station, which can be implemented as follows: the terminal sends PMI, PMI to the base station It includes the broadband amplitude of the combining coefficient of the third beam and the broadband amplitude of the combining coefficient of the fourth beam.

可选的，由于两个相邻的插值点才能确定出一条插值直线，也就意味着，当插值点数目大于或等于2时，才可以确定子带索引和子带幅度之间的关系。因此，在终端上报低优先级波束的合并系数时，若某一低优先级波束对应的插值点数目为1，可以隐式指示终端采取上报宽带幅度和宽带相位的方式来上报该低优先级波束的合并系数，从而可以降低终端上报PMI的开销。Optionally, since two adjacent interpolation points can determine an interpolation straight line, it means that when the number of interpolation points is greater than or equal to 2, the relationship between the subband index and the subband amplitude can be determined. Therefore, when the terminal reports the combination coefficient of the low-priority beam, if the number of interpolation points corresponding to a low-priority beam is 1, the terminal can be implicitly instructed to report the low-priority beam by adopting the method of reporting the broadband amplitude and broadband phase To reduce the overhead of reporting PMI by the terminal.

采用上述终端上报低优先级波束的合并系数的方法，在一种实现方式中，对MIMO***性能影响较小的低优先级波束，终端上报相同几个子带处的合并系数，并且，仅指示相同几个子带的索引即可，一方面，降低了指示子带索引的比特开销，另一方面，相比于现有技术中，对于宽带幅度小的波束，仅上报波束的宽带幅度，本申请实施例中，可以上报低优先级波束的子带幅度，能够更加精细的反映合并系数的子带特征，减少***性能损失。在另一实现方式中，终端上报低优先级波束的宽带合并系数，也就是说，对于每一低优先级波束，仅上报一个宽带合并系数，无需上报子带索引，也无需上报多个子带合并系数，进一步降低了上报PMI的开销。Using the above method for reporting the combining coefficients of low priority beams by the terminal, in one implementation, the low priority beams that have little impact on the performance of the MIMO system, the terminal reports the combining coefficients at the same subbands, and only indicates the same Several subband indexes are sufficient. On the one hand, the bit overhead for indicating the subband index is reduced. On the other hand, compared with the prior art, for a beam with a small broadband amplitude, only the broadband amplitude of the beam is reported. In an example, the sub-band amplitude of the low-priority beam can be reported, which can more accurately reflect the sub-band characteristics of the combining coefficient and reduce system performance loss. In another implementation, the terminal reports the broadband combining coefficient of the low-priority beam, that is, for each low priority beam, only one broadband combining coefficient is reported, and there is no need to report the subband index or report multiple subband merges. Coefficient, further reducing the overhead of reporting PMI.

上述主要以终端上报合并系数的幅度为例进行说明，需要说明的是，终端上报合并系数的相位的过程可参考上述上报幅度的过程，这里不再赘述。合并系数的幅度和相位一起用于表示完整的合并系数。The foregoing mainly uses the terminal to report the amplitude of the merging coefficient as an example. It should be noted that the process of reporting the phase of the merging coefficient by the terminal can refer to the above process of reporting the amplitude, which will not be repeated here. The amplitude and phase of the merge coefficient are used together to represent the complete merge coefficient.

S306、接入网设备根据PMI确定2L-1个波束各自的合并系数。S306. The access network device determines respective combining coefficients of the 2L-1 beams according to the PMI.

具体的，对于终端上报合并系数的子带特征(包括子带幅度、子带相位)的情况，接入网设备根据接收到的子带索引，以及各子带处的子带幅度，使用线性插值方法得到全部子带处的合并系数。对于终端上报合并系数的宽带特征(包括宽带幅度和宽带相位)的情况，接入网设备根据接收到的波束宽带幅度和宽带相位，确定在整个***带宽波束对应的合并系数。Specifically, for the case where the terminal reports the subband characteristics (including subband amplitude and subband phase) of the merge coefficient, the access network device uses linear interpolation according to the received subband index and the subband amplitude at each subband The method obtains the merge coefficients at all subbands. For the case where the terminal reports the broadband characteristics (including broadband amplitude and broadband phase) of the merge coefficient, the access network device determines the merge coefficient corresponding to the entire system bandwidth beam according to the received beam broadband amplitude and broadband phase.

本申请实施例提供的通信方法，终端从2L-1个波束中确定K个波束，并向接入网设备发送PMI，以指示2L-1个波束各自的合并系数。其中，对于K个波束，终端上报波束的合并系数时，上报波束在频域单元处的合并系数(即频域单元合并系数)，对于2L-1-K个波束，终端上报波束的合并系数时，上报波束在频域单元处的合并系数，或者，上报波束的宽带合并系数。也就是说，针对不同波束，终端上报合并系数的方式可能不同，从而，在不影响MIMO***性能的前提下，可以降低PMI所占开销。In the communication method provided by the embodiment of the present application, the terminal determines K beams from the 2L-1 beams, and sends a PMI to the access network device to indicate the respective combination coefficients of the 2L-1 beams. Among them, for K beams, when the terminal reports the beam combining coefficient, the beam combining coefficient at the frequency domain unit (that is, the frequency domain unit combining coefficient) is reported. For 2L-1-K beams, the terminal reports the beam combining coefficient , Report the beam combining coefficient at the frequency domain unit, or report the broadband combining coefficient of the beam. That is to say, for different beams, the terminal may report the combining coefficients in different ways, so that the PMI overhead can be reduced without affecting the performance of the MIMO system.

本申请实施例提供的通信方法可应用于终端向基站上报信道状态信息(Channel State Information，CSI)的流程中。参见图6，该流程包括如下步骤：The communication method provided by the embodiment of the present application may be applied to a process in which a terminal reports channel state information (Channel Information) (CSI) to a base station. Referring to Figure 6, the process includes the following steps:

S601、接入网设备向终端发送信道状态信息参考信号(Channel State Information Reference Signal，CSI-RS)。S601. The access network device sends a channel state information reference signal (Channel State Information Reference, CSI-RS) to the terminal.

相应的，终端从接入网设备接收CSI-RS。Correspondingly, the terminal receives the CSI-RS from the access network device.

S602、终端根据CSI-RS获取CSI。S602. The terminal acquires CSI according to CSI-RS.

其中，S601和S602的具体实现可参见现有技术，这里不再赘述。The specific implementation of S601 and S602 can refer to the prior art, and will not be repeated here.

S603、终端向接入网设备发送CSI。S603. The terminal sends CSI to the access network device.

相应的，接入网设备从终端接收CSI。Correspondingly, the access network device receives CSI from the terminal.

其中，CSI包括PMI。关于PMI的描述具体可参见上文，这里不再赘述。进而，接入网设备根据CSI包括的PMI确定下行信号对应的预编码矩阵，完成对下行信号的预编码。Among them, CSI includes PMI. For the description of PMI, please refer to the above, which will not be repeated here. Furthermore, the access network device determines the precoding matrix corresponding to the downlink signal according to the PMI included in the CSI, and completes the precoding of the downlink signal.

可以理解的是，本申请实施例中的网元为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本申请中所公开的实施例描述的各示例的单元及算法步骤，本申请实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本申请实施例的技术方案的范围。It can be understood that, in order to realize the above-mentioned functions, the network element in the embodiment of the present application includes a hardware structure and/or a software module corresponding to each function. With reference to the example units and algorithm steps described in the embodiments disclosed in the present application, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solutions of the embodiments of the present application.

本申请实施例可以根据上述方法示例对网元进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。In the embodiments of the present application, the network elements may be divided into functional units according to the above method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above integrated unit may be implemented in the form of hardware or software functional unit. It should be noted that the division of the units in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.

图7示出了本申请实施例中提供的通信装置的一种示意性框图，该通信装置可以为上述的终端或者接入网设备。该通信装置700可以以软件的形式存在，还可以为可用于设备的芯片。通信装置700包括：处理单元702和通信单元703。可选的，通信单元703还可以划分为发送单元(并未在图17中示出)和接收单元(并未在图17中示出)。其中，发送单元，用于支持通信装置700向其他网元发送信息。接收单元，用于支持通信装置700从其他网元接收信息。FIG. 7 shows a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device may be the foregoing terminal or access network device. The communication device 700 may exist in the form of software, and may also be a chip that can be used for a device. The communication device 700 includes a processing unit 702 and a communication unit 703. Optionally, the communication unit 703 may be further divided into a sending unit (not shown in FIG. 17) and a receiving unit (not shown in FIG. 17). The sending unit is used to support the communication device 700 to send information to other network elements. The receiving unit is used to support the communication device 700 to receive information from other network elements.

可选的，通信装置700还可以包括存储单元701，用于存储通信装置700的程序代码和数据，数据可以包括不限于原始数据或者中间数据等。Optionally, the communication device 700 may further include a storage unit 701 for storing program codes and data of the communication device 700, and the data may include but not limited to original data or intermediate data.

若通信装置700为上文提及的终端，处理单元702可以用于支持终端执行图3中的S301、S302、S303、S304，图6中的S602等，和/或用于本文所描述的方案的其它过程。通信单元703用于支持终端和其他网元(例如上述接入网设备等)之间的通信，例如支持终端执行图3中的S305，图6中的S601、S603等。可选的，在将通信单元划分为发送单元和接收单元的情况下，发送单元，用于支持终端向其他网元发送信息。比如支持终端执行图6中的S603等，和/或用于本文所描述的方案的其它过程。接收单元，用于支持终端从其他网元接收信息。比如，支持终端执行图6中的S601等，和/或用于本文所描述的方案的其它过程。If the communication device 700 is the terminal mentioned above, the processing unit 702 may be used to support the terminal to execute S301, S302, S303, S304 in FIG. 3, S602 in FIG. 6, etc., and/or for the scheme described herein Other processes. The communication unit 703 is used to support communication between the terminal and other network elements (such as the aforementioned access network device, etc.), for example, to support the terminal to execute S305 in FIG. 3, S601, S603 in FIG. 6, and so on. Optionally, when the communication unit is divided into a sending unit and a receiving unit, the sending unit is used to support the terminal to send information to other network elements. For example, the support terminal performs S603 in FIG. 6 and/or other processes used in the scheme described herein. The receiving unit is used to support the terminal to receive information from other network elements. For example, the support terminal executes S601 in FIG. 6, etc., and/or other processes for the scheme described herein.

若通信装置700为接入网设备，处理单元702可以用于支持接入网设备执行图3中的S306，和/或用于本文所描述的方案的其它过程。通信单元703用于支持接入网设备和其他网元(例如上述终端等)之间的通信，例如支持接入网设备执行图3中的S305、图6中的S601、S603等。可选的，在将通信单元划分为发送单元和接收单元的情况下，发送单元，比如可用于支持接入网设备执行图6中的S601等，和/或用于本文所描述的方案的其它过程。接收单元，比如，可用于支持接入网设备执行图6中的S603。If the communication apparatus 700 is an access network device, the processing unit 702 may be used to support the access network device to perform S306 in FIG. 3, and/or other processes for the scheme described herein. The communication unit 703 is used to support communication between the access network device and other network elements (such as the foregoing terminal, etc.), for example, to support the access network device to execute S305 in FIG. 3, S601, S603 in FIG. 6, and so on. Optionally, in the case where the communication unit is divided into a sending unit and a receiving unit, the sending unit, for example, can be used to support the access network device to perform S601 in FIG. 6, and/or other schemes described herein process. The receiving unit, for example, can be used to support the access network device to perform S603 in FIG. 6.

一种可能的方式中，处理单元702可以是控制器或图2所示的处理器201或处理器207，例如可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理(Digital Signal Processing，DSP)，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field－Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信单元703可以是图2所示的收发器204、还可以是收发电路等。存储单元701可以是图2所示的存储器203。In a possible manner, the processing unit 702 may be a controller or the processor 201 or the processor 207 shown in FIG. 2, for example, may be a central processing unit (Central Processing Unit, CPU), a general-purpose processor, and digital signal processing ( Digital Signaling (DSP), Application Specific Integrated Circuit (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any of them combination. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, DSP and microprocessor combinations, and so on. The communication unit 703 may be the transceiver 204 shown in FIG. 2 or a transceiver circuit. The storage unit 701 may be the memory 203 shown in FIG. 2.

本领域普通技术人员可以理解：在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包括一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(Digital Video Disc，DVD))、或者半导体介质(例如固态硬盘(Solid State Disk，SSD))等。A person of ordinary skill in the art may understand that, in the foregoing embodiment, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, Digital Video Disc (DVD)), or semiconductor media (eg, Solid State Disk (SSD)) )Wait.

在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络设备(例如终端设备)上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network devices (for example Terminal equipment). Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个功能单元独立存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本申请可借助软件加必需的通用硬件的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在可读取的存储介质中，如计算机的软盘，硬盘或光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course it can also be implemented by hardware, but in many cases the former is a better embodiment . Based on such an understanding, the technical solution of the present application can essentially be embodied in the form of a software product that contributes to the existing technology, and the computer software product is stored in a readable storage medium, such as a computer floppy disk , A hard disk or an optical disk, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in the embodiments of the present application.

以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。The above are only specific implementations of the present application, but the scope of protection of the present application is not limited to this, and changes or replacements within the technical scope disclosed in the present application should be covered by the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

一种通信方法，其特征在于，包括：A communication method, characterized in that it includes:

终端从2L-1个波束中确定K个波束，其中，L、K均为正整数；The terminal determines K beams from 2L-1 beams, where L and K are both positive integers;

所述终端向接入网设备发送预编码矩阵指示PMI，所述PMI用于指示每一个空间层上2L-1个波束各自对应的合并系数，所述每一个空间层上2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元处分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束对应的宽带合并系数。The terminal sends a precoding matrix indication PMI to the access network device, where the PMI is used to indicate the merger coefficient corresponding to each 2L-1 beam on each space layer, and each 2L-1 beam on each space layer The corresponding combining coefficients include the combining coefficients corresponding to each of the K beams at at least two frequency domain units, and each of the 2L-1 beams except the K beams is at least Merge coefficients corresponding to the two frequency domain units respectively, or the respective merge coefficients corresponding to the 2L-1 beams include the merge coefficients corresponding to at least two frequency domain units of each beam of the K beams, and the The broadband combining coefficient corresponding to each beam except the K beams in the 2L-1 beam.
根据权利要求1所述的通信方法，其特征在于，单个波束在频域单元对应的合并系数由频域单元幅度和频域单元相位表示；单个波束对应的宽带合并系数由宽带幅度和宽带相位表示；The communication method according to claim 1, wherein the combination coefficient corresponding to a single beam in the frequency domain unit is represented by the frequency domain unit amplitude and the frequency domain unit phase; the broadband combining coefficient corresponding to the single beam is represented by the broadband amplitude and broadband phase ;

所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：在M个频域单元的每一频域单元第一波束分别对应的合并系数，以及在N个频域单元的每一频域单元第二波束分别对应的合并系数，M、N均为大于或等于2的整数；所述M、N的数值相同，且所述第一波束的M个频域单元与所述第二波束的N个频域单元中的每一频域单元分别相同，或者，所述M个频域单元和所述N个频域单元中存在不同的频域单元；所述M个频域单元和所述N个频域单元中单个频域单元的索引以及在所述单个频域单元处的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述M个频域单元和所述N个频域单元中的单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；Combining coefficients corresponding to at least two frequency domain units of each beam of the K beams respectively include: combining coefficients corresponding to the first beam of each frequency domain unit of M frequency domain units, and Merge coefficients corresponding to the second beam of each frequency domain unit of the domain unit respectively, M and N are integers greater than or equal to 2; the M and N have the same value, and the M frequency domain units of the first beam It is the same as each frequency domain unit in the N frequency domain units of the second beam, or there are different frequency domain units in the M frequency domain units and the N frequency domain units; the M Each frequency domain unit and the index of a single frequency domain unit in the N frequency domain units and the amplitude of the frequency domain unit of the merging coefficient at the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used For fitting the relationship curve between the index of the frequency domain unit and the amplitude of the frequency domain unit of the merging coefficient, or the index of the single frequency domain unit in the M frequency domain units and the N frequency domain units and the single The frequency domain unit phase of the merge coefficient of the frequency domain unit corresponds to an interpolation point, and each two adjacent interpolation points are used to fit the relationship curve between the frequency domain unit index and the frequency domain unit phase of the merge coefficient;

所述每一个空间层上2L-1个波束中除所述K个波束外的每一波束的宽带合并系数，包括：第三波束的宽带合并系数、第四波束的宽带合并系数；The broadband combining coefficient of each beam except the K beams among the 2L-1 beams on each spatial layer includes: a broadband combining coefficient of the third beam and a broadband combining coefficient of the fourth beam;

其中，所述第一波束和所述第二波束为所述K个波束中的任意两个波束，所述第三波束、所述第四波束为所述2L-1波束中除所述K个波束外的任意两个波束。Wherein, the first beam and the second beam are any two of the K beams, and the third beam and the fourth beam are the 2L-1 beams except the K beams Any two beams outside the beam.
根据权利要求2所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度，所述N个频域单元的索引、所述第三波束的合并系数的宽带幅度，以及所述第四波束的合并系数的宽带幅度。The communication method according to claim 2, wherein the PMI includes: the frequency domain unit amplitude of the combining coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M Indexes of the frequency domain units, the amplitude of the frequency domain unit of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the third beam The broadband amplitude of the combining coefficient of, and the broadband amplitude of the combining coefficient of the fourth beam.
根据权利要求2所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位，所述N个频域单元的索引、所述第三波束的合并系数的宽带相位、所述第四波束的合并系数的宽带相位。The communication method according to claim 2, wherein the PMI includes: a frequency domain unit phase of the merge coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M Frequency domain unit index, the frequency domain unit phase of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the third beam The wideband phase of the combining coefficient of, and the wideband phase of the combining coefficient of the fourth beam.
根据权利要求1所述的通信方法，其特征在于，The communication method according to claim 1, wherein

所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：M个频域单元的每一频域单元第一波束对应的合并系数，以及在N个频域单元的每一频域单元第二波束对应的合并系数，M、N均为大于或等于2的整数；所述M、N的数值相同，且所述第一波束的M个频域单元与所述第二波束的N个频域单元中的每一频域单元分别相同，或者，所述M个频域单元和所述N个频域单元中存在不同的频域单元；所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；The merge coefficients corresponding to at least two frequency domain units of each beam of the K beams include: the merge coefficient corresponding to the first beam of each frequency domain unit of the M frequency domain units, and the N frequency domain units For each frequency domain unit, the merge coefficient corresponding to the second beam of M, N and N are integers greater than or equal to 2; the values of M and N are the same, and the M frequency domain units of the first beam are the same as the Each frequency domain unit of the N frequency domain units of the second beam is respectively the same, or there are different frequency domain units in the M frequency domain units and the N frequency domain units; the M frequency domain units Unit and the index of a single frequency domain unit in the N frequency domain units and the amplitude of the frequency domain unit of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used to fit the frequency domain The relationship curve between the unit index and the frequency domain unit amplitude of the merging coefficient, or the index of a single frequency domain unit in the M frequency domain units and the N frequency domain units and the merging coefficient of the single frequency domain unit The phase of the frequency domain unit corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship curve between the index of the frequency domain unit and the phase of the frequency domain unit of the merge coefficient;

所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，包括：在P个频域单元的每一频域单元第三波束对应的合并系数、在所述P个频域单元的每一频域单元第四波束对应的合并系数；P为大于或等于2的整数；所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；In each of the 2L-1 beams except the K beams, the merge coefficients corresponding to at least two frequency domain units respectively include: the third beam corresponding to each frequency domain unit of the P frequency domain units Merge coefficient, the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units; P is an integer greater than or equal to 2; the index of the single frequency domain unit in the P frequency domain units and the index The frequency domain unit amplitude of the merge coefficients of the single frequency domain unit corresponds to an interpolation point, and each two adjacent interpolation points are used to fit the relationship curve between the frequency domain unit index and the frequency domain unit amplitude of the merge coefficient, or, The index of a single frequency domain unit in the P frequency domain units and the frequency domain unit phase of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used to fit the index of the frequency domain unit The relationship curve between the frequency domain unit phase of the merge coefficient;

其中，所述第一波束和所述第二波束为所述K个波束中的任意两个波束，所述第三波束、所述第四波束为所述2L-1波束中除所述K个波束外的任意两个波束。Wherein, the first beam and the second beam are any two of the K beams, and the third beam and the fourth beam are the 2L-1 beams except the K beams Any two beams outside the beam.
根据权利要求5所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元幅度、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元幅度，以及所述P个频域单元的索引。The communication method according to claim 5, wherein the PMI includes: the frequency domain unit amplitude of the combining coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M The index of each frequency domain unit, the amplitude of the frequency domain unit of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the P frequency The frequency domain unit amplitude of the merge coefficient corresponding to the third beam of each frequency domain unit of the domain unit, the frequency domain unit amplitude of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units, and the Describe the index of P frequency domain units.
根据权利要求5所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元相位、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元相位，以及所述P个频域单元的索引。The communication method according to claim 5, wherein the PMI includes: a frequency domain unit phase of the merge coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M Frequency domain unit index, the frequency domain unit phase of the merge coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the P frequency The frequency domain unit phase of the merge coefficient corresponding to the third beam of each frequency domain unit of the domain unit, the frequency domain unit phase of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units, and Describe the index of P frequency domain units.
根据权利要求2至7中任一项所述的通信方法，其特征在于，在所述终端向接入网设备发送PMI之前，所述方法还包括：The communication method according to any one of claims 2 to 7, wherein before the terminal sends the PMI to the access network device, the method further comprises:

针对第一波束，所述终端从N _SB个频域单元中确定M个频域单元，N _SB为***带宽包含的频域单元数； For a first beam, said terminal determining unit M frequency-domain frequency-domain from the N _SB cells, N _SB is the number of frequency domain included in the system bandwidth units;

针对第二波束，所述终端从N _SB个频域单元中确定N个频域单元。 For the second beam, the terminal determines N frequency domain units from N _SB frequency domain units.
根据权利要求2至8中任一项所述的通信方法，其特征在于，所述方法还包括：The communication method according to any one of claims 2 to 8, wherein the method further comprises:

针对第三波束，所述终端从N _SB个频域单元中确定P个频域单元； For the third beam, the terminal determines P frequency domain units from N _SB frequency domain units;

针对第四波束，所述终端从N _SB个频域单元中确定P个频域单元，所述第三波束的P个频域单元与所述第四波束的P个频域单元中的每一频域单元分别相同。 For the fourth beam, the terminal determines P frequency domain units from N _SB frequency domain units, each of the P frequency domain units of the third beam and the P frequency domain units of the fourth beam The frequency domain units are the same.
根据权利要求1至9中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中合并系数的宽带幅度最大的K个波束，或者，所述K个波束为所述2L-1个波束中合并系数的宽带幅度大于或等于幅度阈值的K个波束。The communication method according to any one of claims 1 to 9, wherein the K beams are the K beams with the largest broadband amplitude of the merging coefficient among the 2L-1 beams, or, the K The beams are K beams whose broadband amplitude of the combining coefficient in the 2L-1 beams is greater than or equal to the amplitude threshold.
根据权利要求1至9中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中插值点的数目最少的K个波束，或者，所述K个波束为所述2L-1个波束中插值点的数目小于或等于插值点数目阈值的K个波束。The communication method according to any one of claims 1 to 9, wherein the K beams are the K beams with the smallest number of interpolation points among the 2L-1 beams, or the K beams The beams are K beams whose number of interpolation points in the 2L-1 beams is less than or equal to the threshold of the number of interpolation points.
根据权利要求1至9中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值最大的K个波束；或者，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值大于或等于距离阈值的K个波束。The communication method according to any one of claims 1 to 9, wherein the K beams are between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient in the 2L-1 beams K beams with the largest average difference; or, the K beams are the 2L-1 beams, and the average difference between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient is greater than or equal to the distance Threshold K beams.
根据权利要求1至12中任一项所述的通信方法，其特征在于，用于指示插值点对应的频域单元索引的比特数为
其中，inter为单个波束对应的插值点数目，N _SB为***带宽包含的频域单元数目，num_sb为预设插值点数目。 The communication method according to any one of claims 1 to 12, wherein the number of bits used to indicate the frequency domain unit index corresponding to the interpolation point is
Where, inter is the number of interpolation points corresponding to a single beam, N _SB is the number of frequency domain units included in the system bandwidth, and num_sb is the preset number of interpolation points.
根据权利要求1至12中任一项所述的通信方法，其特征在于，所述终端从N _SB个频域单元中确定M个频域单元，包括：所述终端自第一频域单元开始，每间隔预设数目的频域单元选择一个频域单元，直至确定M个频域单元，其中，所述M个频域单元中的最后一个频域单元为第二频域单元。 The communication method according to any one of claims 1 to 12, wherein the terminal determining M frequency domain units from N _SB frequency domain units includes: the terminal starting from the first frequency domain unit , Select a frequency domain unit at a preset number of frequency domain units every interval until M frequency domain units are determined, wherein the last frequency domain unit among the M frequency domain units is a second frequency domain unit.
根据权利要求2至14中任一项所述的通信方法，其特征在于，单个波束的插值点数目为1，所述单个波束的合并系数为所述单个波束的宽带合并系数。The communication method according to any one of claims 2 to 14, wherein the number of interpolation points of a single beam is 1, and the combining coefficient of the single beam is a broadband combining coefficient of the single beam.
一种通信方法，其特征在于，包括：A communication method, characterized in that it includes:

接入网设备从终端接收预编码矩阵指示PMI；The access network device receives the precoding matrix indication PMI from the terminal;

所述接入网设备根据所述PMI确定每一个空间层上2L-1个波束各自的合并系数；所述2L-1个波束各自对应的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及，所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，或者，所述2L-1波束各自的合并系数包括所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，以及所述2L-1波束中除所述K个波束外的每一波束的宽带合并系数。The access network device determines the respective combining coefficients of the 2L-1 beams on each spatial layer according to the PMI; the combining coefficients corresponding to the 2L-1 beams include each beam of the K beams at least Merge coefficients corresponding to the two frequency domain units respectively, and the merge coefficients corresponding to at least two frequency domain units of each beam except the K beams in the 2L-1 beam, or, the 2L- The respective combining coefficients of the 1 beam include the combining coefficients corresponding to each of the K beams in at least two frequency domain units, and the broadband of each beam except the K beams in the 2L-1 beam Merge coefficient.
根据权利要求16所述的通信方法，其特征在于，单个波束在频域单元对应的合并系数由频域单元幅度和频域单元相位表示；单个波束对应的宽带合并系数由宽带幅度和宽带相位表示；The communication method according to claim 16, wherein the combination coefficient corresponding to a single beam in the frequency domain unit is represented by the frequency domain unit amplitude and the frequency domain unit phase; the broadband combining coefficient corresponding to the single beam is represented by the broadband amplitude and broadband phase ;

所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：在M个频域单元的每一频域单元第一波束分别对应的合并系数，以及在N个频域单元的每一频域单元第二波束分别对应的合并系数，M、N均为大于或等于2的整数；所述M、N的数值相同，且所述第一波束的M个频域单元与所述第二波束的N个频域单元中的每一频域单元分别相同，或者，所述M个频域单元和所述N个频域单元中存在不同的频域单元；所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；Combining coefficients corresponding to at least two frequency domain units of each beam of the K beams respectively include: combining coefficients corresponding to the first beam of each frequency domain unit of M frequency domain units, and Merge coefficients corresponding to the second beam of each frequency domain unit of the domain unit respectively, M and N are integers greater than or equal to 2; the M and N have the same value, and the M frequency domain units of the first beam It is the same as each frequency domain unit in the N frequency domain units of the second beam, or there are different frequency domain units in the M frequency domain units and the N frequency domain units; the M Each frequency domain unit and the index of a single frequency domain unit in the N frequency domain units and the amplitude of the frequency domain unit of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and each two adjacent interpolation points are used to simulate The relationship between the index of the combined frequency domain unit and the amplitude of the frequency domain unit of the merge coefficient, or the index of the single frequency domain unit and the single frequency domain unit of the M frequency domain units and the N frequency domain units The frequency domain unit phase of the merge coefficient corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship curve between the frequency domain unit index and the frequency domain unit phase of the merge coefficient;

所述2L-1个波束中除所述K个波束外的每一波束的宽带合并系数，包括：第三波束的宽带合并系数、第四波束的宽带合并系数；The broadband combining coefficient of each beam except the K beams in the 2L-1 beams includes: a broadband combining coefficient of the third beam and a broadband combining coefficient of the fourth beam;

其中，所述第一波束和所述第二波束为所述K个波束中的任意两个波束，所述第三波束、所述第四波束为所述2L-1波束中除所述K个波束外的任意两个波束。Wherein, the first beam and the second beam are any two of the K beams, and the third beam and the fourth beam are the 2L-1 beams except the K beams Any two beams outside the beam.
根据权利要求16所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度，所述N个频域单元的索引、所述第三波束的合并系数的宽带幅度，以及所述第四波束的合并系数的宽带幅度。The communication method according to claim 16, wherein the PMI comprises: in each frequency domain unit of the M frequency domain units, the frequency domain unit amplitude of the merge coefficient of the first beam, the M Indexes of the frequency domain units, the amplitude of the frequency domain unit of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the third beam The broadband amplitude of the combining coefficient of, and the broadband amplitude of the combining coefficient of the fourth beam.
根据权利要求16所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位，所述N个频域单元的索引、所述第三波束的合并系数的宽带相位、所述第四波束的合并系数的宽带相位。The communication method according to claim 16, wherein the PMI comprises: the frequency domain unit phase of the merge coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M Frequency domain unit index, the frequency domain unit phase of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the third beam The wideband phase of the combining coefficient of, and the wideband phase of the combining coefficient of the fourth beam.
根据权利要求16所述的通信方法，其特征在于，The communication method according to claim 16, wherein:

所述K个波束中每一波束在至少两个频域单元分别对应的合并系数，包括：M个频域单元的每一频域单元第一波束对应的合并系数，以及在N个频域单元的每一频域单元第二波束对应的合并系数，M、N均为大于或等于2的整数；所述M、N的数值相同，且所述第一波束的M个频域单元与所述第二波束的N个频域单元中的每一频域单元分别相同，或者，所述M个频域单元和所述N个频域单元中存在不同的频域单元；所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述M个频域单元和所述N个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；The merge coefficients corresponding to at least two frequency domain units of each beam of the K beams include: the merge coefficient corresponding to the first beam of each frequency domain unit of the M frequency domain units, and the N frequency domain units For each frequency domain unit, the merge coefficient corresponding to the second beam of M, N and N are integers greater than or equal to 2; the values of M and N are the same, and the M frequency domain units of the first beam are the same as the Each frequency domain unit of the N frequency domain units of the second beam is respectively the same, or there are different frequency domain units in the M frequency domain units and the N frequency domain units; the M frequency domain units Unit and the index of a single frequency domain unit in the N frequency domain units and the amplitude of the frequency domain unit of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used to fit the frequency domain The relationship curve between the unit index and the frequency domain unit amplitude of the merging coefficient, or the index of a single frequency domain unit in the M frequency domain units and the N frequency domain units and the merging coefficient of the single frequency domain unit The phase of the frequency domain unit corresponds to an interpolation point, and every two adjacent interpolation points are used to fit the relationship curve between the index of the frequency domain unit and the phase of the frequency domain unit of the merge coefficient;

所述2L-1波束中除所述K个波束外的每一波束在至少两个频域单元分别对应的合并系数，包括：在P个频域单元的每一频域单元第三波束对应的合并系数、在所述P个频域单元的每一频域单元第四波束对应的合并系数；P为大于或等于2的整数；所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元幅度对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元幅度之间的关系曲线，或者，所述P个频域单元中单个频域单元的索引以及所述单个频域单元的合并系数的频域单元相位对应一个插值点，每两个相邻的插值点用于拟合频域单元索引与合并系数的频域单元相位之间的关系曲线；In each of the 2L-1 beams except the K beams, the merge coefficients corresponding to at least two frequency domain units respectively include: the third beam corresponding to each frequency domain unit of the P frequency domain units Merge coefficient, the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units; P is an integer greater than or equal to 2; the index of the single frequency domain unit in the P frequency domain units and the index The frequency domain unit amplitude of the merge coefficients of the single frequency domain unit corresponds to an interpolation point, and each two adjacent interpolation points are used to fit the relationship curve between the frequency domain unit index and the frequency domain unit amplitude of the merge coefficient, or, The index of a single frequency domain unit in the P frequency domain units and the frequency domain unit phase of the merge coefficient of the single frequency domain unit correspond to an interpolation point, and every two adjacent interpolation points are used to fit the index of the frequency domain unit The relationship curve between the frequency domain unit phase of the merge coefficient;

其中，所述第一波束和所述第二波束为所述K个波束中的任意两个波束，所述第三波束、所述第四波束为所述2L-1波束中除所述K个波束外的任意两个波束。Wherein, the first beam and the second beam are any two of the K beams, and the third beam and the fourth beam are the 2L-1 beams except the K beams Any two beams outside the beam.
根据权利要求20所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元幅度、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元幅度、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元幅度、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元幅度，以及所述P个频域单元的索引。The communication method according to claim 20, wherein the PMI includes: the frequency domain unit amplitude of the combining coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M The index of each frequency domain unit, the amplitude of the frequency domain unit of the combining coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the P frequency The frequency domain unit amplitude of the merge coefficient corresponding to the third beam of each frequency domain unit of the domain unit, the frequency domain unit amplitude of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units, and the Describe the index of P frequency domain units.
根据权利要求20所述的通信方法，其特征在于，所述PMI包括：在所述M个频域单元的每一频域单元所述第一波束的合并系数的频域单元相位、所述M个频域单元的索引、在所述N个频域单元的每一频域单元所述第二波束的合并系数的频域单元相位、所述N个频域单元的索引、所述P个频域单元的每一频域单元第三波束对应的合并系数的频域单元相位、在所述P个频域单元的每一频域单元第四波束对应的合并系数的频域单元相位，以及所述P个频域单元的索引。The communication method according to claim 20, wherein the PMI includes: a frequency domain unit phase of the merge coefficient of the first beam in each frequency domain unit of the M frequency domain units, the M Frequency domain unit index, the frequency domain unit phase of the merge coefficient of the second beam in each frequency domain unit of the N frequency domain units, the index of the N frequency domain units, the P frequency The frequency domain unit phase of the merge coefficient corresponding to the third beam of each frequency domain unit of the domain unit, the frequency domain unit phase of the merge coefficient corresponding to the fourth beam of each frequency domain unit of the P frequency domain units, and Describe the index of P frequency domain units.
根据权利要求16至22中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中合并系数的宽带幅度最大的K个波束，或者，所述K个波束为所述2L-1个波束中合并系数的宽带幅度大于或等于幅度阈值的K个波束。The communication method according to any one of claims 16 to 22, wherein the K beams are the K beams with the largest broadband amplitude of the combining coefficient of the 2L-1 beams, or, the K The beams are K beams whose broadband amplitude of the combining coefficient in the 2L-1 beams is greater than or equal to the amplitude threshold.
根据权利要求16至22中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中插值点的数目最少的K个波束，或者，所述K个波束为所述2L-1个波束中插值点的数目小于或等于插值点数目阈值的K个波束。The communication method according to any one of claims 16 to 22, wherein the K beams are the K beams with the smallest number of interpolation points among the 2L-1 beams, or the K beams The beams are K beams whose number of interpolation points in the 2L-1 beams is less than or equal to the threshold of the number of interpolation points.
根据权利要求16至22中任一项所述的通信方法，其特征在于，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值最大的K个波束；或者，所述K个波束为所述2L-1个波束中，合并系数的频域单元幅度和合并系数的宽带幅度之间的平均差值大于或等于距离阈值的K个波束。The communication method according to any one of claims 16 to 22, wherein the K beams are between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient in the 2L-1 beams K beams with the largest average difference; or, the K beams are the 2L-1 beams, and the average difference between the frequency domain unit amplitude of the merging coefficient and the broadband amplitude of the merging coefficient is greater than or equal to the distance Threshold K beams.
根据权利要求16至25中任一项所述的通信方法，其特征在于，用于指示插值点对应的频域单元索引的比特数为
其中，inter为单个波束对应的插值点数目，N _SB为***带宽包含的频域单元数目，num_sb为预设插值点数目。 The communication method according to any one of claims 16 to 25, wherein the number of bits used to indicate the index of the frequency domain unit corresponding to the interpolation point is
Where, inter is the number of interpolation points corresponding to a single beam, N _SB is the number of frequency domain units included in the system bandwidth, and num_sb is the preset number of interpolation points.
根据权利要求16至25中任一项所述的通信方法，其特征在于，所述终端从N _SB个频域单元中确定M个频域单元，包括：所述终端自第一频域单元开始，每间隔预设数目的频域单元选择一个频域单元，直至确定M个频域单元，其中，所述M个频域单元中的最后一个频域单元为第二频域单元。 The communication method according to any one of claims 16 to 25, wherein the terminal determining M frequency domain units from N _SB frequency domain units includes: the terminal starting from the first frequency domain unit , Select a frequency domain unit at a preset number of frequency domain units every interval until M frequency domain units are determined, wherein the last frequency domain unit among the M frequency domain units is a second frequency domain unit.
根据权利要求17至27中任一项所述的通信方法，其特征在于，单个波束的插值点数目为1，所述单个波束的合并系数为所述单个波束的宽带合并系数。The communication method according to any one of claims 17 to 27, wherein the number of interpolation points of a single beam is 1, and the combining coefficient of the single beam is a broadband combining coefficient of the single beam.
根据权利要求17至28中任一项所述的通信方法，其特征在于，所述接入网设备根据所述PMI确定2L-1个波束各自的合并系数，包括：The communication method according to any one of claims 17 to 28, wherein the access network device determines the combining coefficient of each of the 2L-1 beams according to the PMI, including:

所述接入网设备根据K个波束中每一波束对应的两个或两个以上插值点，通过线性插值方式确定K个波束中的每一波束在每一频域单元对应的合并系数；The access network device determines, according to two or more interpolation points corresponding to each beam of the K beams, a linear interpolation method to determine a merge coefficient corresponding to each frequency domain unit of each beam of the K beams;

所述接入网设备根据2L-1-K个波束中每一波束对应的两个或两个以上插值点，通过线性插值方式确定2L-1-K个波束中的每一波束在每一频域单元对应的合并系数；或者，所述接入网设备根据2L-1-K个波束中每一波束对应的宽带合并系数确定所述2L-1-K个波束中的每一波束在每一频域单元对应的合并系数。The access network device determines, according to two or more interpolation points corresponding to each beam in the 2L-1-K beams, that each beam in the 2L-1-K beams is at each frequency through linear interpolation The combination coefficient corresponding to the domain unit; or, the access network device determines that each beam of the 2L-1-K beams depends on the broadband combination coefficient corresponding to each beam in the 2L-1-K beams The merge coefficient corresponding to the frequency domain unit.
一种通信装置，其特征在于，用于支持如权利要求1至15中任一项所述的通信方法的执行。A communication device characterized by supporting the execution of the communication method according to any one of claims 1 to 15.
一种通信装置，其特征在于，用于支持如权利要求16至29中任一项所述的通信方法的执行。A communication device characterized by supporting the execution of the communication method according to any one of claims 16 to 29.