WO2017075819A1

WO2017075819A1 - Method and apparatus for transmitting precoding matrix index

Info

Publication number: WO2017075819A1
Application number: PCT/CN2015/094030
Authority: WO
Inventors: 张瑞齐; 刘建琴; 吴强
Original assignee: 华为技术有限公司
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-11
Also published as: CN108352875B; CN108352875A

Abstract

Embodiments of the present invention provide a method and apparatus for transmitting a precoding matrix index, which relate to the field of communications, and can transmit a precoding matrix index on a physical uplink control channel (PUCCH) in an application scenario of a two-dimensional antenna. The solution comprises: a UE receives configuration information and pilot information sent by a base station; the UE performs downsampling on P candidate column vectors according to the configuration information to obtain K column vectors that constitute a precoding matrix W, wherein 0<K≤64≤P; the UE determines, from the K column vectors according to the pilot information, a first precoding matrix W₁ and a second precoding matrix W₂ that constitute the precoding matrix W, wherein the precoding matrix W=W₁*W₂; and the UE sends a first index of the first precoding matrix W₁ and a second index of the second precoding matrix W₂ to the base station by means of a PUCCH, such that the base station determines the precoding matrix W according to the first index and the second index.

Description

Method and device for transmitting precoding matrix index

Technical field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting a precoding matrix index.

Background technique

In the 3rd Generation Partnership Project 3GPP Long Term Evolution (LTE) Release 13, the following discussion has been reached regarding the discussion of the eight-antenna codebook.

The current precoding matrix W consists of two parts, namely: W = W ₁ * W ₂

Wherein, W ₁ belongs to one codebook set C1 (the codebook set refers to a set of candidate precoding matrices), and W ₂ belongs to another codebook set C2. W _{1 is} used to indicate the broadband/long-term channel characteristics; W _{2 is} used to indicate the sub-band/instantaneous channel characteristics in W ₁ .

Specifically, when the UE and a base station for communication, the UE will determine the first precoding matrix index (PMI, Precoding Matrix Index) W 1 and a second pre-coding matrix index W ₂ using a physical uplink control channel (Physical The number of bits (for example, 5 bits) specified in the Uplink Control CHannel, PUCCH) is fed back to the base station, so that the base station determines W ₁ and W ₂ according to the first precoding matrix index and the second precoding matrix index, and finally according to W ₁ and W ₂ determines a precoding matrix in which the number of bits carrying the precoding index indication is determined by a pre-preset feedback mode.

However, with the introduction of two-dimensional antennas (ie, 2D antennas), the number of antenna ports and the direction indicated by the antenna ports are significantly increased, which directly leads to a large increase in the number of codebooks in the codebook sets C1 and C2, for example, in one dimension. In the eight-antenna scenario, the codebook set C1 can construct 16 W ₁ , that is, the UE can use the 4 bits to feed back the first precoding matrix index of W ₁ to the base station, and in the two-dimensional sixteen antenna port scenario, the codebook set. C1 may construct 128 W ₁ , that is, the UE needs to use 7 bits to feed back the first precoding matrix index of W ₁ to the base station, which is far beyond the number of bits specified in the feedback mode existing in the PUCCH, resulting in two In the application scenario of the dimension antenna, the precoding matrix index cannot be transmitted through the PUCCH.

Summary of the invention

An embodiment of the present invention provides a method and an apparatus for transmitting a precoding matrix index, which can transmit a precoding matrix index on a PUCCH in an application scenario of a two-dimensional antenna.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a method for transmitting a precoding matrix index, where a UE includes a first vector set, where the first vector set includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P, the method includes: the UE receiving configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N _{1 of the} two-dimensional antenna in the first dimension, and a first oversampling factor O ₁ , and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; the UE downsamples the P candidate column vectors according to the configuration information, to obtain the precoding matrix K column vectors of W, 0 < K ≤ 64 ≤ P; the UE determines, based on the pilot information, a first precoding matrix W ₁ and a second precoding that construct the precoding matrix W from the K column vectors a matrix W ₂ , wherein the precoding matrix W=W ₁ *W ₂ ; the UE passes the first index of the first precoding matrix W ₁ and the second precoding matrix W ₂ through a physical uplink control channel PUCCH Sending a second index to the base station, so that the base station according to the The first index and the second index determine the precoding matrix W.

It can be seen that, by downsampling, no more than 64 column vectors are selected from the original P candidate column vectors to form the precoding matrix W. Further, the UE can use the existing 3GPP protocol and derive K information according to the pilot information. Determining, in the column vector, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; and the first precoding matrix W ₁ through the PUCCH The first index and the second index of the second precoding matrix W ₂ are sent to the base station to implement transmission of the precoding matrix index through the PUCCH in the application scenario of the two-dimensional antenna.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first vector set includes a first dimension candidate vector set v _l and a second dimension candidate vector set u _k , where the UE is configured according to The configuration information is used to downsample the P candidate column vectors to obtain K column vectors constituting the precoding matrix, including: determining, by the UE, the sampling frequency of the down sampling according to the configuration information; Collecting L first dimension vectors in the first dimension candidate vector set v _l

Collecting J second dimension vectors from the second dimension candidate vector set u _k

L*J=K, L, J, l', k' are all integers greater than or equal to zero.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining, by the UE, the sampling frequency of the down sampling according to the configuration information, Sampling factor O ₁ , calculating a first dimensional vector from the first set of candidate vectors v _l by using a first sampling formula

Sampling frequency; the UE calculates a second dimension vector from the second dimension of the candidate vector set u _k by using the first sampling formula according to the second oversampling factor O ₂

Sampling frequency.

With reference to the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, when the number of antenna ports is 12 or 16, the first sampling formula is:

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

Wherein l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N ₁ * N ₂ * the number of polarization directions.

With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the foregoing aspect, the determining, by the UE, the sampling frequency of the down sampling according to the configuration information, Acquiring the first dimension vector from the first dimension candidate vector set v _l by the second sampling formula

The UE collects the second dimension vector from the second dimension candidate vector set u _k by using the second sampling formula according to the configuration information.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, when the number of antenna ports is 16 or 12, if O ₁ =O ₂ , and N ₁ <N ₂ , the second sampling formula is:

Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

With reference to any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the UE receives configuration information and a pilot sent by the base station After the information, the method further includes: calculating, by the UE, the first dimension of the candidate vector set v _l according to the configuration information,

The UE calculates the second-dimensional candidate vector set u _k according to the configuration information,

With reference to any one of the first to the sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the UE, according to the pilot information, from the K columns Determining, in the vector, the first precoding matrix W ₁ and the second precoding matrix W ₂ for constructing the precoding matrix, the UE determining, according to the pilot information, the first precoding matrix W from the K column vectors _1; the UE determines that the second precoding matrix W ₂ from the first column vector of the precoding matrix W ₁ based on the configuration parameters.

With reference to any one of the first to the seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the UE, the first pre-coding matrix W ₁ by using a PUCCH Sending the first index and the second index of the second precoding matrix W ₂ to the base station, including: the UE adopting PUCCH mode 1-1 submode 1, the first index of the first precoding matrix W ₁ and A second index of the second precoding matrix W ₂ is sent to the base station.

With reference to any one of the first to the seventh possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the UE, the first pre-coding matrix W ₁ by using a PUCCH The first index and the second index of the second precoding matrix W ₂ are sent to the base station, including: the UE passes the PUCCH mode 1-1 submode 2, and the first index of the first precoding matrix W ₁ is A second index of the second precoding matrix W ₂ is sent to the base station.

With reference to any one of the first to the ninth possible implementation manners of the first aspect, in a tenth possible implementation manner of the foregoing aspect, the receiving, by the UE, the configuration information sent by the base station, The UE receives the configuration information sent by the base station by using radio resource control RRC signaling.

In a second aspect, an embodiment of the present invention provides a method for transmitting a precoding matrix index, including: receiving, by the UE, configuration information and pilot information sent by a base station, where the configuration information includes configuration parameters, and the two-dimensional antenna is in the first dimension. a first antenna port number N ₁ and a first oversampling factor O ₁ , and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; the UE determines the configuration based on the pilot information a first precoding matrix W ₁ and a second precoding matrix W _{2 of the} precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; the UE determines the physical uplink control channel according to the configuration information The number of bits on the PUCCH for transmitting the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ is Z, Z>0; the UE passes the PUCCH according to the Z The number of bits sends the first index and the second index to the base station, so that the base station determines the precoding matrix W according to the first index and the second index.

That is, the UE may determine the number of bits used to transmit the precoding matrix index on the PUCCH according to the foregoing configuration information sent by the base station, that is, in the newly defined submode, the precoding matrix index is transmitted. The number of bits used may be flexibly configured according to changes in configuration parameters, so that the precoding matrix index is transmitted through the PUCCH in the application scenario of the two-dimensional antenna.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the UE includes a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P, wherein the UE determines, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct the precoding matrix W, including: determining, by the UE, the base station according to the pilot information The rank indicating RI information and the channel quality indicating CQI information; the UE determining, according to the RI information, the first precoding matrix W ₁ and the second precoding matrix constructing the precoding matrix W from the P candidate column vectors W ₂ .

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the UE sends the first index and the second index according to the number of Z bits by using the PUCCH The base station includes: the UE jointly coding the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint code value; and the UE uses the PUCCH to set the first bit of Z1 bits And transmitting, by the PUCCH, the second index of the second precoding matrix W ₂ of the Z2 bits and the CQI information to the base station, Z1+Z2=Z , Z1>0, Z2>0.

In conjunction with the first possible implementation of the second aspect, in a third possible implementation of the second aspect, the first index includes a first dimension index in a first dimension and a second dimension in a second dimension a two-dimensional index, wherein the UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, where the UE jointly encodes the first dimension index and the RI information. Obtaining a second union code value; the UE jointly coding the second dimension index, the second index, and the CQI information to obtain a third union code value; the UE according to the Z number of bits, the first The binary sum code value and the third joint code value are transmitted to the base station through the PUCCH.

In conjunction with the first possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the first index includes a first dimension index in a first dimension and a second dimension in a second dimension a second dimension index, wherein the UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, where the UE jointly encodes the second dimension index and the RI information. Obtaining a fourth joint code value, the UE jointly coding the first dimension index, the second index, and the CQI information to obtain a fifth joint code value; the UE obtains the number of Z bits according to the number of Z bits. The fourth union code value and the fifth union code value are transmitted to the base station through the PUCCH.

With reference to the third or fourth possible implementation of the second aspect, in a fifth possible implementation manner of the second aspect, the first index and the number of the Z bits are used by the UE by using the PUCCH Before the second index is sent to the base station, the method further includes: receiving, by the UE, an encoding indication sent by the base station, where the encoding indication is used to indicate that the RI information is jointly encoded with the first dimension index or the second dimension index.

In a third aspect, an embodiment of the present invention provides a UE, where the UE includes: a processor, a memory, and a transceiver, where the memory is configured to store a first vector set, where the first vector set includes a pre-configuration a P candidate matrix vector of the coding matrix W, 64 ≤ P; the transceiver is configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna of the two-dimensional antenna in the first dimension a port number N ₁ and a first oversampling factor O ₁ , and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; the processor configured to use the P according to the configuration information The candidate column vectors are downsampled to obtain K column vectors constituting the precoding matrix W, 0<K≤64≤P; and, according to the pilot information, determining the precoding matrix from the K column vectors a first precoding matrix W ₁ and a second precoding matrix W _{2 of} W, wherein the precoding matrix W=W ₁ *W ₂ ; the transceiver is further configured to use the PUCCH to the first precoding matrix W ₁ the first index and the second precoding matrix W ₂ is the second cable Transmits to the base station, so that the base station determines the precoding matrix based on the first index and the second index W.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the processor is configured to determine a sampling frequency of the down sampling according to the configuration information, and select a candidate to be selected from the first dimension according to the sampling frequency. Collecting L first dimension vectors in vector set v _l

Collecting J second-dimensional vectors from the second-dimensional candidate vector set u _k

L*J=K, L, J, l', k' are integers greater than or equal to 0; wherein the first vector set includes a first dimension candidate vector set v _l and a second dimension candidate vector set u _k .

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the processor is configured to calculate, according to the first oversampling factor O ₁ , by using a first sampling formula Collecting the first dimension vector from the first dimension candidate vector set v _l

a sampling frequency; and, according to the second oversampling factor O ₂ , calculating a second dimensional vector from the second dimensional candidate vector set u _k by using the first sampling formula

Sampling frequency

Wherein, when the number of antenna ports is 12 or 16, the first sampling formula is:

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N ₁ * N ₂ * the number of polarization directions.

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the processor is configured to use the second sampling formula to obtain the first Collecting the first dimension vector in the selected vector set v _l

And acquiring, according to the configuration information, the second dimension vector from the second dimension candidate vector set u _k by using the second sampling formula

Wherein, when the number of antenna ports is 16 or 12, if O ₁ =O ₂ and N ₁ <N ₂ , the second sampling formula is:

Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

With reference to any one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is further configured to calculate the The first dimension of the candidate vector set v _l ,

And calculating, according to the configuration information, the second dimension candidate vector set u _k ,

With reference to any one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the processor is specifically configured to use, according to the pilot information, the K is determined from the first column vector in the precoding matrix W _1; and the configuration parameter determines the second precoding matrix W ₂ from the first column vector of the precoding matrix W ₁ in accordance with.

With reference to any one of the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the transceiver is specifically configured to pass the PUCCH mode 1-1 sub-mode 1, the first precoding matrix W ₁ of the first index and the second index of precoding matrix W ₂ is transmitted to the second base station.

With reference to any one of the first to fifth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the transceiver is specifically configured to pass the PUCCH mode 1-1 sub-mode 2, the first precoding matrix W ₁ of the first index and the second index of precoding matrix W ₂ is transmitted to the second base station.

With reference to any one of the first to the seventh possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, the transceiver is configured to receive the RRC signaling The configuration information sent by the base station.

In a fourth aspect, an embodiment of the present invention provides a UE, including: a processor, a memory, and a transceiver, where the transceiver is configured to receive configuration information and pilot information sent by a base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; And determining, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; The configuration information determines that the number of bits used to transmit the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ on the PUCCH is Z, and Z>0; The first index and the second index are sent to the base station according to the number of Z bits by using the PUCCH, so that the base station determines the precoding matrix according to the first index and the second index. .

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the memory is configured to store a first vector set, where the first vector set includes P candidate column vectors for constructing the precoding matrix W 64 ≤ P; the processor is specifically configured to determine, according to the pilot information, rank indication RI information and channel quality indication CQI information with the base station; and, according to the RI information, from the P candidate column vectors Determining a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct the precoding matrix W.

In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation manner of the fourth aspect, the processor is further configured to use the first index of the first precoding matrix W ₁ and the RI The information is jointly encoded to obtain a first joint code value; the transceiver is further configured to send, by using the PUCCH, the first joint code value of Z1 bits to the base station by using the PUCCH; and, by using the PUCCH, The second index of the second precoding matrix W ₂ of Z2 bits and the CQI information are transmitted to the base station, Z1+Z2=Z, Z1>0, and Z2>0.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the first index includes a first dimension index in a first dimension and a second dimension in a second dimension a second dimension index, wherein the processor is further configured to jointly encode the first dimension index and the RI information to obtain a second union code value; and, the second dimension index, the second index, and the The CQI information is jointly encoded to obtain a third joint code value. The transceiver is further configured to send the second joint code value and the third joint code value to the third joint code value according to the Z number of bits. Base station.

With reference to the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the first index includes a first dimension index in a first dimension and a second dimension in a second dimension a two-dimensional index, wherein the processor is also used to The second dimension index is jointly encoded with the RI information to obtain a fourth joint code value; and the first dimension index, the second index, and the CQI information are jointly encoded to obtain a fifth joint code value; And sending, by the number of Z bits, the obtained fourth joint code value and the fifth joint code value to the base station by using the PUCCH.

In conjunction with the third or fourth possible implementation of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the transceiver is further configured to receive an encoding indication sent by the base station, where the encoding indication is used Instructing the RI information to be jointly encoded with the first dimension index or the second dimension index.

In a fifth aspect, an embodiment of the present invention provides a precoding matrix index transmission apparatus, where the apparatus includes a first vector set, where the first vector set includes P candidate column vectors for constructing a precoding matrix W. And 64 ≤ P, the device specifically includes: a receiving unit, configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a number of first antenna ports N _{1 of the} two-dimensional antenna in the first dimension, and a first oversampling factor O ₁ , and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; a sampling unit, configured to perform the P candidate column vectors according to the configuration information Sampling, obtaining K column vectors constituting the precoding matrix W, 0<K≤64≤P; determining unit, configured to determine, according to the pilot information, the first structure of the precoding matrix W from the K column vectors a precoding matrix W ₁ and a second precoding matrix W ₂ , wherein the precoding matrix W=W ₁ *W ₂ ; a transmitting unit, configured to use the PUCCH to first index the first precoding matrix W ₁ the second precoding matrix W ₂ is the second cable Transmits to the base station, so that the base station determines the precoding matrix based on the first index and the second index W.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the first vector set includes a first dimension candidate vector set v _l and a second dimension candidate vector set u _k , the determining unit, further And determining, by the configuration information, the sampling frequency of the down sampling; the sampling unit is configured to collect L first dimensional vectors from the first dimension of the candidate vector set v _l according to the sampling frequency.

L*J=K, L, J, l', k' are all integers greater than or equal to zero.

With reference to the first possible implementation of the fifth aspect, in a second possible implementation manner of the fifth aspect, the device further includes a computing unit, and specifically, the calculating unit, specifically, according to the first oversampling The factor O ₁ is calculated by the first sampling formula to acquire the first dimension vector from the first dimension of the candidate vector set v _l

a sampling frequency; and, according to the second oversampling factor O ₂ , calculating a second dimensional vector from the second set of candidate vectors u _k by the first sampling formula

Sampling frequency.

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

With reference to the first possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the device further includes a computing unit, and the computing unit is specifically configured to pass the configuration information according to the configuration information. The second sampling formula collects the first dimensional vector from the first set of candidate vector sets v _l

Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

With reference to any one of the first to third possible implementation manners of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the calculating unit is further configured to calculate the The first dimension of the candidate vector set v _l ,

With reference to any one of the first to fourth possible implementation manners of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the determining unit is specifically configured to use, according to the pilot information, the K is determined from the first column vector in the precoding matrix W _1; and the configuration parameter determines the second precoding matrix W ₂ from the first column vector of the precoding matrix W ₁ in accordance with.

With reference to any one of the first to fifth possible implementation manners of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the sending unit is specifically configured to pass the PUCCH mode 1-1 sub-mode 1, the first precoding matrix W ₁ of the first index and the second index of precoding matrix W ₂ is transmitted to the second base station.

Alternatively, the sending unit is specifically configured to send, by using the PUCCH mode 1-1 sub-mode 2, the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ to the base station.

With reference to any one of the first to the sixth possible implementation manners of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the sending unit is further configured to receive the RRC signaling The configuration information sent by the base station.

In a sixth aspect, an embodiment of the present invention provides a precoding matrix index transmission apparatus, where the apparatus specifically includes: a receiving unit, configured to receive configuration information and pilot information sent by a base station, where the configuration information includes configuration parameters, and two-dimensional a first antenna port number N ₁ and a first oversampling factor O _{1 of the} antenna in the first dimension, and a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension; Determining, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; and, according to the configuration information Determining, on the physical uplink control channel PUCCH, the number of bits used to transmit the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ is Z, Z>0 a sending unit, configured to send, by using the PUCCH, the first index and the second index to the base station according to the number of Z bits, so that the base station determines the precoding matrix according to the first index and the second index. W.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the UE includes a first vector set, where the first vector set includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P, wherein the determining unit is specifically configured to determine RI information and CQI information between the base station and the base station according to the pilot information; and, according to the RI information, determine, construct the pre-determination from the P candidate column vectors. The first precoding matrix W ₁ and the second precoding matrix W _{2 of the} encoding matrix W.

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the apparatus further includes a joint coding unit, where the joint coding unit is configured to use the first precoding matrix _a first index for the jointly coded RI information, and the encoded value to obtain a first joint; the transmission unit is further configured to, with the first and the encoded value Z1 to the bits transmitted by the PUCCH by the PUCCH a base station; and, by the PUCCH, transmitting a second index of the second precoding matrix W ₂ of Z2 bits and the CQI information to the base station, Z1+Z2=Z, Z1>0, and Z2>0.

With reference to the first possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the apparatus further includes a joint coding unit, where the first index includes a first dimension index in the first dimension And a second dimension index on the second dimension, The joint coding unit is further configured to jointly encode the first dimension index and the RI information to obtain a second union code value; and perform the second dimension index, the second index, and the CQI information. Joint coding, to obtain a third joint code value; the sending unit is further configured to send the second joint code value and the third joint code value to the base station by using the PUCCH according to the number of Z bits.

Or the joint coding unit is further configured to jointly encode the second dimension index and the RI information to obtain a fourth union code value; and, the first dimension index, the second index, and the CQI information Performing joint coding to obtain a fifth joint code value; the sending unit is further configured to send, according to the Z number of bits, the obtained fourth joint code value and the fifth joint code value to the base station by using the PUCCH .

With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the receiving unit is further configured to receive an encoding indication sent by the base station, where the encoding indication is used to indicate the RI The information is jointly encoded with the first dimension index or the second dimension index.

So far, an embodiment of the present invention provides a method and an apparatus for transmitting a precoding matrix index, and the UE selects no more than 64 column vectors from the original P candidate column vectors to form the precoding matrix W by downsampling, and further The UE may use the existing 3GPP protocol to determine, from the K column vectors, the first precoding matrix W ₁ and the second precoding matrix W ₂ that construct the precoding matrix W according to the pilot information, where the precoding matrix W= W ₁ *W ₂ ; and transmitting the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ to the base station by using the PUCCH to implement transmission through the PUCCH in the application scenario of the two-dimensional antenna Precoding matrix index; or, the UE may determine the number of bits used to transmit the precoding matrix index on the PUCCH according to the foregoing configuration information sent by the base station, that is, in the newly defined submode, the transmission precoding The number of bits used for the matrix index may be flexibly configured according to the change of the configuration parameters, so as to transmit the precoding matrix index through the PUCCH in the application scenario of the two-dimensional antenna.

DRAWINGS

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

FIG. 1 is a schematic diagram of an application scenario of transmitting a precoding matrix index according to an embodiment of the present disclosure;

2 is a schematic flowchart 1 of a method for transmitting a precoding matrix index according to an embodiment of the present invention;

3 is a schematic diagram 1 of a downsampling method according to an embodiment of the present invention;

4 is a second schematic diagram of a downsampling method according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart 2 of a method for transmitting a precoding matrix index according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram 1 of a device for transmitting a precoding matrix index according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram 2 of a transmission apparatus of a precoding matrix index according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram 1 of a hardware structure of a user equipment according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram 3 of a transmission apparatus of a precoding matrix index according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram 4 of a transmission apparatus of a precoding matrix index according to an embodiment of the present disclosure;

FIG. 11 is a second schematic structural diagram of a hardware structure of a user equipment according to an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

In addition, the terms "first" and "second" are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

The method for transmitting a precoding matrix index provided by the embodiment of the present invention can be applied to a MIMO (Multiple-Input Multiple-Output) transmission scenario in an LTE system and a future 5G system. Specifically, FIG. 1 is a schematic diagram of an application scenario of a method for transmitting a precoding matrix index according to an embodiment of the present invention, where a base station may send pilot information to a UE, and further, the UE according to the pilot information and has been determined. The codebook set (that is, the P candidate column vectors used to construct the precoding matrix W, the number of P is usually less than 64 in the application scenario of the one-dimensional antenna) performs channel estimation to determine channel state information (CSI). For example, Rank Indicator (RI) information, Channel Quality Indicator (CQI) information, and Precoding Matrix Indicator (PMI) information, and the like.

Wherein, since the pre-coding matrix W = W ₁ * W _2, so that the PMI information may comprise specific configuration of the precoding matrix W of the first precoding matrix W ₁ and second precoding matrix W _2, so that, the UE further Combining the RI information, the CQI information, and the first index of the first precoding matrix W ₁ (ie, the first PMI) and the second index of the second precoding matrix W ₂ (ie, the second PMI) by joint coding (Joint source- channel coding, JSCC), etc. to the base station, so the base station can determine the first precoding matrix W based on the first _{PMI. _1,.} _1, the precoding matrix W finally obtained the second PMI precoding matrix W is determined in accordance with a first .

Specifically, in the existing 3GPP protocol, when the UE sends the PMI information to the base station, the aperiodic feedback can be performed through the PUSCH (Physical Uplink Shared Channel), where the number of bits used to transmit the PMI information follows The configurable parameter changes, or the UE may periodically send back a fixed number (for example, 5 bits) of bits on the PUCCH when transmitting the PMI information to the base station, for example, adopting the PUCCH mode already specified in the 3GPP protocol. 1-1 submode 1 and submode 2 Feedback PMI information.

However, with the introduction of a two-dimensional antenna (ie, a 2D antenna), the number of antenna ports and the direction indicated by the antenna port are significantly increased, that is, the number P of candidate column vectors for constructing the precoding matrix W is significantly increased. Then, the number of the first precoding matrix W ₁ and the second precoding matrix W ₂ constructed from the P candidate column vectors is also increased, and therefore, the PUCCH mode 1-1 already specified in the 3GPP protocol is used. Submode 1 and submode 2, the method of feeding back the first PMI and the second PMI using a fixed number of bits is no longer applicable.

Therefore, the embodiments of the present invention provide two feasible solutions to how to transmit the precoding matrix index (ie, the first PMI and the second PMI) on the PUCCH in the application scenario of the two-dimensional antenna.

In the first mode, in order to ensure that the precoding matrix index can be transmitted in the PUCCH mode 1-1 sub-mode 1 and the sub-mode 2 using a fixed number of bits, and the application scenario of the two-dimensional antenna is satisfied, the pre-coding provided by the embodiment of the present invention The method for transmitting the matrix index may be based on configuration information sent by the base station (ie, configuration parameters, the number of first antenna ports N ₁ and the first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, and the second dimension) a second antenna port number N ₂ and a second oversampling factor O ₂ ), and down-sampling the P candidate column vectors to obtain K column vectors constituting the precoding matrix W, since 0<K≤64≤ P, such that the UE can construct the first precoding matrix W ₁ and the second precoding matrix W ₂ from the downsampled K column vectors on the basis of the existing 3GPP protocol, and use the existing transmission mode in the PUCCH The first PMI and the second PMI are transmitted on.

In the second embodiment, in order to solve the problem of how to transmit the precoding matrix index (ie, the first PMI and the second PMI) on the PUCCH in the application scenario for the two-dimensional antenna, in the embodiment of the present invention, a new PUCCH is defined. a sub-mode of mode 1-1, wherein the UE may determine the number of bits used for transmitting the precoding matrix index on the PUCCH according to the foregoing configuration information sent by the base station, that is, in the newly defined sub-mode, The number of bits used for transmitting the precoding matrix index can be flexibly configured according to the change of the configuration information, and can be applied to the transmission of the precoding matrix index in the application scenario of the two-dimensional antenna.

In the following embodiments, the solution to the problem of the transmission problem of the precoding matrix index in the application scenario of the two-dimensional antenna is described in detail.

Example 1

For the foregoing manner 1, the embodiment of the present invention provides a method for transmitting a precoding matrix index, where the UE includes a first vector set, where the first vector set includes P candidates for constructing the precoding matrix W. Column vector, 64 ≤ P, as shown in Figure 2, the method specifically includes:

101. The UE receives configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, and a second The second antenna port number N ₂ and the second oversampling factor O _{2 in the} dimension.

102. The UE downsamples the P candidate column vectors according to the configuration information, and obtains K column vectors constituting the precoding matrix W, where 0<K≤64≤P.

103. The UE determines, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W from the K column vectors, where the precoding matrix W=W ₁ *W ₂ .

104, UE a first index of a first pre-coding matrix W ₁ and a second precoding matrix W ₂ is the second index to the base station via PUCCH, so that the base station determines the precoding matrix based on the first index and the second index W.

In step 101, the UE may separately receive configuration information and pilot information sent by the base station.

For example, the UE may receive a reference signal set sent by the base station, where the reference signal set includes pilot information, that is, the base station continuously transmits the unmodulated direct sequence spread spectrum signal, which enables the UE to obtain the forward code division multiple access channel time limit. Provides a relevant demodulation phase reference.

For example, the UE may receive RRC (Radio Resource Control) signaling sent by the base station, where the RRC signaling carries the configuration information. Specifically, the configuration information includes a configuration parameter (ie, Codebook-Subset-SelectionConfig, referred to as config in the 3GPP protocol), a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension. And a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension.

It should be noted that N ₁ refers to the number of antenna ports in the first dimension in a certain polarization direction. Similarly, N ₂ refers to the number of antenna ports in the second dimension in the polarization direction.

For convenience of description, in the subsequent embodiment, the first antenna port number N ₁ , the first oversampling factor O ₁ , the second antenna port number N _{2 ,} and the second oversampling factor O _{2 are} represented as (N ₁ , N ₂ ). , (O ₁ , O ₂ ).

In step 102, the UE downsamples the P candidate column vectors according to the configuration information acquired in step 101 (that is, samples a sample interval, for example, the P candidate column vectors, are sampled at intervals). Thus, the new sequence is the downsampling of the original sequence, and K column vectors constituting the precoding matrix W are obtained, 0 < K ≤ 64 ≤ P.

It can be seen that the K column vectors are a subset of the P candidate column vectors, and the number K of the downsampled column vectors is an integer less than or equal to 64, and the existing one for the one-dimensional antenna is In the transmission process of the coding matrix index, the number of vectors constituting the precoding matrix W is also less than or equal to 64. Therefore, the UE can obtain the K column vectors by downsampling the P candidate column vectors. The transmission method of the precoding matrix index in the technology performs the subsequent transmission step, so that the precoding matrix index is transmitted through the PUCCH in the application scenario of the two-dimensional antenna based on the existing transmission method of the precoding matrix index.

It should be noted that the foregoing P candidate column vectors (ie, the first vector set) may be pre-stored in the memory of the UE before performing the transmission method of the precoding matrix index; the P candidate column vectors After the step 101, the UE is calculated according to the configuration information sent by the base station, where the first vector set specifically includes a first dimension candidate vector set v _l and a second dimension candidate vector set u _{k .} .

Exemplarily, after step 101, the UE calculates the first dimension of the candidate vector set v _l according to the first antenna port number N ₁ and the first oversampling factor O ₁ in the configuration information:

And, the UE calculates the second-dimensional candidate vector set u _k according to the second antenna port number N ₂ and the second over-sampling factor O _{2 in} the configuration information:

So far, the UE can obtain P candidate column vectors in the first vector set composed of the first-dimensional candidate vector set v _l and the first-dimensional candidate vector set v _l .

In the following, the UE further performs the method of down-sampling the P candidate column vectors according to the configuration information in step 102 to obtain K column vectors constituting the precoding matrix W.

Specifically, the UE determines, according to the configuration information, a sampling frequency of the down sampling (ie, determining sampling from each of the P candidate column vectors); and further, the UE selects from the first dimension of the candidate vector according to the sampling frequency. _l collect L first dimension vectors

And collecting J second-dimensional vectors from the second-dimensional candidate vector set u _k

L*J=K, 0<L, 0<J, l' is an integer greater than or equal to 0, and k' is an integer greater than or equal to zero.

For example, the UE calculates L first-dimensional vectores from the first-dimensional candidate vector set v _l by using the first sampling formula according to the first over-sampling factor O ₁ .

Sampling frequency; and, according to the second oversampling factor O ₂ , the UE calculates J second dimension vectors from the second dimension candidate vector set u _k by using the first sampling formula calculation

Sampling frequency.

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

The "number of antenna ports" described in the embodiment of the present invention refers to the sum of the number of antenna ports in each dimension in each polarization direction. Taking two polarization directions as an example, the number of antenna ports = N ₁ * N ₂ *2.

Exemplarily, if (N ₁ , N ₂ )=(4,2) and (O ₁ , O ₂ )=(8,4), then the above formulas (11) and (12) can be calculated. The first dimension candidate vector set v _l and the second dimension candidate vector set u _{k in a} vector set, as shown in FIG. 3, can obtain a first dimension candidate vector set v _l composed of 32 candidate column vectors _. And a second-dimensional candidate vector set u _k composed of 8 candidate column vectors, at this time, P = N ₁ * O ₁ * N ₂ * O ₂ = 32 * 8 = 256.

At this time, in the case where the number of antenna ports is 12, the first sampling formula is:

That is, l=2l', k=2k', see FIG. 4, when l is equal to 0, 1, ..., 15, respectively, in the first dimension, the first dimension of the candidate vector set v composed of 32 candidate column vectors _l select 0th, 2nd, ... until the 30th candidate column vector is the downsampling vector; when k is equal to 0, 1, 3, 4 respectively, in the second dimension, from 8 candidate column vectors The 0th, 2nd, 4th, and 6th candidate column vectors of the second-dimensional candidate vector set u _k are respectively selected as a down-sampling vector, so that a total of K column vectors can be acquired, K =L*J=16*4=64.

Similarly, the UE may further calculate, according to the first oversampling factor O ₁ , the second oversampling factor O ₂ , the first antenna port number N ₁ , and the second antenna port number N ₂ , by using the second sampling formula. Collecting L first-dimensional vectors in the dimension of the candidate vector set v _l

Sampling frequency, and collecting J second-dimensional vectors from the second-dimensional candidate vector set u _k

Sampling frequency.

Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

It can be seen that, unlike the above first sampling formula, the frequency of downsampling needs to be determined by the value of (N ₁ , N ₂ ) in addition to the value of (O ₁ , O ₂ ).

In addition, as a variant of the above downsampling method, the UE may also implement a process of downsampling P candidate column vectors by the following method.

Specifically, the UE may preset a local oversampling factor.

among them,

It may be any one of (2, 4), (4, 2), (2, 2) or (4, 4), such that after the UE obtains (N ₁ , N ₂ ) in the configuration information in step 101 Can make

Further, the values of (N ₁ , N ₂ ) and (O ₁ , O ₂ ) are brought into the formulas (11) and (12), and the obtained

Further obtained by

with

The K column vectors that make up.

So far, the UE downsamples the P candidate column vectors according to the configuration information to obtain K column vectors constituting the precoding matrix W.

In step 103, the UE determines, according to the pilot information obtained in step 101, the first precoding matrix W ₁ and the second precoding matrix W that construct the precoding matrix W from the K column vectors determined in step 102. ₂ , wherein the precoding matrix W=W ₁ *W ₂ .

Specifically, the UE based on the pilot information may perform channel estimation, determine the RI information and the CQI information, and further, the UE, determining a first precoding matrix W ₁ from the K column vector based on the RI information; the UE according to the configuration parameters ( config) determining a second precoding matrix W ₂ from the first column vector of the precoding matrix W _1.

The following takes the RANK equal to 1 as an example for specific description. The UE performs channel estimation according to the pilot information, determines that RANK is equal to 1, and selects eight first precodings from the K column vectors determined in step 102 according to the RI information. The matrix W ₁ , since the 64 column vectors can construct at most 16 (2 ⁴ ) 8 columns of the first precoding matrix W ₁ , the UE can use 4 bits to indicate the first of the first precoding matrix W ₁ in the future. Index (ie the first PMI).

Further, the UE needs to determine the second precoding matrix W ₂ from the column vectors of the first precoding matrix W ₁ according to the configuration parameters determined in step 101. Specifically, the RUI information is 1 (ie, rank=1), and the 3GPP configuration defines four configuration parameters (config1-4) as shown in Table 1 and a second index of the second precoding matrix W ₂ ( That is, the correspondence between the second PMI, and the correspondence between the second PMI (indicated by i _{2 in} Table 2) and the precoding matrix W as shown in Table 2.

Table 1

ConfigConfig	选择出的第二PMISelect the second PMI	(s₁，s₂)(s ₁ , s ₂ )
Config1Config1	0-30-3	(1,1)(1,1)
Config2Config2	0-7,16-230-7, 16-23	(2,2)(2,2)
Config3Config3	0-3,8-11,20-23,28-310-3, 8-11, 20-23, 28-31	(2,2)(2,2)
Config4Config4	0-150-15	(2,2)(2,2)

Table 2

among them,

In this way, the UE finally determines the second index of the second precoding matrix W ₂ , i' ₂ , according to the configuration parameters and the correspondence in Table ₂ .

Further, in step 104, the UE sends the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ to the base station through the PUCCH, so that the base station determines according to the first index and the second index. Precoding matrix W.

Specifically, the UE may still pass the PUCCH mode 1-1 submode 1 (ie, PUCCH mode 1-1 submode1, which has been defined in the 3GPP protocol, and related description in the 3GPP TS 36.213 protocol), and the first precoding matrix W A first index of _{1 and} a second index of the second precoding matrix W ₂ are transmitted to the base station.

Alternatively, the UE uses the PUCCH mode 1-1 submode 2 (PUCCH mode 1-1 submode2, see related description in the 3GPP TS 36.213 protocol), the first index of the first precoding matrix W ₁ and the second pre A second index of the coding matrix W ₂ is transmitted to the base station.

Specifically, in the PUCCH mode 1-1 sub-mode 1, the RI information is jointly encoded with the first PMI, and the coded value obtained by the joint coding is carried in the report 1 to feed back to the base station, and the second PMI and the CQI are transmitted. The information is carried in report2 and directly fed back to the base station. The codebook jointly encoded by the RI information and the first PMI in the PUCCH mode 1-1 sub-mode 1 is as shown in Table 3, and occupies 5 bits in the PUCCH.

table 3

In the PUCCH mode 1-1 sub-mode 2, the RI information is carried in the report 1 and is fed back to the base station. The first PMI and the second PMI are jointly coded, and the coded value obtained by the joint coding is carried in the report 2 to feed back to the base station. The codebook jointly coded by the first PMI and the second PMI is as shown in Table 4. The coded value of the joint coding of the first PMI and the second PMI is transmitted by using 4 bits, wherein 3 bits are used to select the first part of W1. An index, 1 bit is used to select the phase of the fixed vector (co-phase) to indicate W2 The second index.

Table 4

It can be seen that whether the PUCCH mode 1-1 sub-mode 1 or the PUCCH mode 1-1 sub-mode 2 transmission precoding matrix index is used, the period of transmitting the RI information is greater than or equal to the period of the transmission PMI, and the frequency of the change of the RI is required. The frequency of change of the PMI is slower than that of the PMI. This ensures that the feedback period of the RI information is at least equal to the feedback period of the PMI and conforms to the channel variation characteristics, thereby saving the resource overhead of feeding back the RI information. ......

To this end, an embodiment of the present invention provides a method for transmitting a precoding matrix index, where the UE includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P. Specifically, the UE receives configuration information sent by the base station. pilot information, the configuration information includes configuration parameters, the number of two-dimensional antenna the first antenna port in a first dimension of the first through N ₁ - _1, and the number of sampling factor of the second antenna port in a second dimension of the O N ₂ And the second oversampling factor O ₂ ; the UE downsamples the P candidate column vectors according to the configuration information, and obtains K column vectors constituting the precoding matrix W, 0<K≤64≤P; it can be seen that By downsampling, no more than 64 column vectors are selected from the original P candidate column vectors to form the precoding matrix W. Further, the UE can use the existing 3GPP protocol to determine from the K column vectors according to the pilot information. Constructing a first precoding matrix W ₁ and a second precoding matrix W _{2 of the} precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; and the first index of the first precoding matrix W ₁ through the PUCCH And transmitting a second index of the second precoding matrix W ₂ to the base The station is configured to transmit the precoding matrix index through the PUCCH in the application scenario of the two-dimensional antenna.

Example 2

For the second mode, the embodiment of the present invention provides a method for transmitting a precoding matrix index, where the UE includes a first vector set, where the first vector set includes P candidates for constructing the precoding matrix W. Column vector, 64 ≤ P, as shown in FIG. 5, the method specifically includes:

201. The UE receives configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, and a second The second antenna port number N ₂ and the second oversampling factor O _{2 in the} dimension.

202. The UE determines, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W, where the precoding matrix W=W ₁ *W ₂ .

203, UE based on the configuration information, determining the number of bits transmitted for a first pre-coding matrix W ₁ of the first index and the second precoding matrix W ₂ is the second index number Z, Z> 0 in the PUCCH.

204. The UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, so that the base station determines the precoding matrix W according to the first index and the second index.

In step 201, the UE may receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension. And the second antenna port number N ₂ and the second oversampling factor O ₂ in the second dimension. For details, refer to the related description of step 101 in Embodiment 1, and therefore no further details are provided herein.

In step 202, since the UE includes a first set of vectors, the first set of vectors includes P candidate column vectors for constructing the precoding matrix W, 64 ≤ P, and therefore, the UE obtains the method according to step 201. The pilot information determines a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct a precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ .

It can be seen that, different from the first embodiment, in the second embodiment of the present invention, the UE does not need to downsample the P candidate column vectors, but directly determines the constructed precoding matrix from the P candidate column vectors. The first precoding matrix W ₁ and the second precoding matrix W _{2 of} W.

Specifically, the UE first performs channel estimation according to the pilot information in step 101, and determines RI information and CQI information between the base station and the base station. Further, the UE determines, according to the RI information, a precoding matrix W from the P candidate column vectors. The first precoding matrix W ₁ and the second precoding matrix W ₂ .

In step 203, the UE determines, according to the configuration information obtained in step 201, the number of bits used to transmit the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ on the PUCCH. For Z, Z>0.

In the sub-mode 1 different from the sub-mode 1 of the PUCCH mode 1-1 and the sub-mode 2 of the PUCCH mode 1-1, the UE can only feed back the first PMI and the second PMI using a fixed number of bits, which is new in the embodiment of the present invention. In the sub-mode of PUCCH mode 1-1, the UE may determine, according to the values of (N ₁ , N ₂ ), (O ₁ , O ₂ ), and configuration parameters, that the first precoding matrix W ₁ is transmitted on the PUCCH. The number of bits Z of the second index of the first index and the second precoding matrix W ₂ , so that the UE can be flexibly configured according to the change of the configuration information, so as to achieve the second The transmission of the precoding matrix index in the application scenario of the dimensional antenna.

Further, in step 204, the UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH determined in step 203, so that the base station determines the precoding according to the first index and the second index. Matrix W.

In the following, in detail, in the case where (N ₁ , N ₂ ), (O ₁ , O ₂ ) and the values of the configuration parameters are different, the UE determines a method of transmitting a precoding matrix index by a different number of bits.

In the first mode, the UE determines the number of bits Z1 for transmitting the first PMI according to the values of (N ₁ , N ₂ ), (O ₁ , O ₂ ) and the configuration parameters. Specifically, the UE may perform the first precoding. The first index of the matrix W ₁ is jointly encoded with the RI information to obtain a first joint code value, and the first joint code value can be represented by Z1 bits. Further, the UE passes the PUCCH to the first of the Z1 bits. Transmitting the encoded value to the base station through the PUCCH; and transmitting, by the PUCCH, the second index and CQI information of the second precoding matrix W ₂ of the Z2 bits to the base station, where Z1+Z2=Z, Z1>0 , Z2>0.

For example, when (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(8,4), the configuration parameter is the case 2, the UE determines to use 8 (Z1 = 8) bits for transmission on the first PMI in the PUCCH, specifically, as shown in table 5, UE first precoding matrix W the first index and the RI information is ₁ Performing joint coding to obtain a first joint coded value I _RI/PMI1 , and then transmitting the first joint coded value to the base station through the PUCCH through 8 bits in the PUCCH, so that the base station according to the first joint code The value and Table 5 give the value of the corresponding first PMI(i ₁ ).

table 5

Or, when (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(8,4), the configuration parameter is the case 2, the UE determines to use 7 (Z1 = 7) bits for transmission on the PUCCH in the first PM, specifically, such as, the UE first precoding matrix W the first index and the RI information are _shown in table 6 The joint coding is performed to obtain a first joint code value I _RI/PMI1 , and then the first joint code value is transmitted to the base station through the PUCCH through 7 bits in the PUCCH.

Table 6

When (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(8,4), the configuration parameter is 3 or In the case of 4, the UE determines to use 7 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ with the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 7 bits in the PUCCH.

When (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(4,4), the configuration parameter is 2 In this case, the UE determines to use the 7 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain the first The union coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 7 bits in the PUCCH.

Or, when (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(4,4), the configuration parameter is In the case of 2, the UE determines to use 6 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 7, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 6 bits in the PUCCH.

Table 7

When (N ₁ , N ₂ )=(4,2) or (N ₁ ,N ₂ )=(3,2), (O ₁ ,O ₂ )=(4,4), the configuration parameter is 3 or In the case of 4, the UE determines to use 6 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 7, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 6 bits in the PUCCH.

When (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,4), the configuration parameter is 2 case, the UE determines to use the first 8 bits for transmission on the PUCCH PMI, specifically, as shown in table 5, UE will first precoding matrix W ₁ of the first index and the RI information is jointly encoded, to give first The coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 8 bits in the PUCCH.

Or, when (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,4), the configuration parameter is In the case of 2, the UE determines to use 7 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 7 bits in the PUCCH.

When (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,4), the configuration parameter is 3 or In the case of 4, the UE determines to use 7 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ with the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 7 bits in the PUCCH.

When (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,8), the configuration parameter is 2 In this case, the UE determines to use 9 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 8, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain the first The union coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 9 bits in the PUCCH.

Table 8

Or, when (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,8), the configuration parameter is In the case of 2, the UE determines to use 8 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 5, the UE jointly encodes the first index of the first precoding matrix W ₁ with the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 8 bits in the PUCCH.

When (N ₁ , N ₂ )=(2,4) or (N ₁ ,N ₂ )=(2,3), (O ₁ ,O ₂ )=(8,8), the configuration parameter is 3 or In the case of 4, the UE determines to use 8 bits for transmitting the first PMI on the PUCCH. Specifically, as shown in Table 5, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain The first joint coded value I _{RI/PMI1 is} then transmitted to the base station through the PUCCH through 8 bits in the PUCCH.

When (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(8, 8), in the case where the configuration parameter is 2, the UE determines to use 8 bits for transmission on the PUCCH. The first PMI, specifically, as shown in Table 5, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint coded value I _RI/PMI1 , and then passes through the PUCCH. The 8 bits are transmitted to the base station through the PUCCH.

Or, when (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(8, 8), in the case where the configuration parameter is 2, the UE determines to use 7 bits for use in the PUCCH. Transmitting the first PMI, specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint coded value I _RI/PMI1 , and then passes the PUCCH. The 7 bits in the medium are transmitted to the base station through the PUCCH.

When (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(8, 8), in the case where the configuration parameter is 3 or 4, the UE determines to use 7 bits for use in the PUCCH. Transmitting the first PMI, specifically, as shown in Table 6, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint coded value I _RI/PMI1 , and then passes the PUCCH. The 7 bits in the medium are transmitted to the base station through the PUCCH.

When (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(4, 4), in the case where the configuration parameter is 2, the UE determines to use 6 bits for transmission on the PUCCH. The first PMI, specifically, as shown in Table 7, the UE combines the first index of the first precoding matrix W ₁ with the RI information to obtain a first joint coded value I _RI/PMI1 , and then passes through the PUCCH. 6 bits, the first combined code value is transmitted to the base station through the PUCCH.

Or, when (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(4, 4), in the case where the configuration parameter is 2, the UE determines to use 5 bits for use in the PUCCH. Transfer the first PMI,

Specifically, as shown in Table 9, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint coded value I _RI/PMI1 , and then passes 5 bits in the PUCCH. And transmitting the first joint code value to the base station through the PUCCH.

Table 9

When (N ₁ , N ₂ )=(2, 2), (O ₁ , O ₂ )=(4, 4), in the case where the configuration parameter is 3 or 4, the UE determines to use 5 bits for use in the PUCCH. Transmitting the first PMI, specifically, as shown in Table 9, the UE jointly encodes the first index of the first precoding matrix W ₁ and the RI information to obtain a first joint code value I _RI/PMI1 , and then passes the PUCCH. The 5 bits in the medium are transmitted to the base station through the PUCCH.

Manner 2, due to the introduction of the 2D antenna, the first index of the first precoding matrix W ₁ (ie, the first PMI) may be indexed by the first dimension in the first dimension (ie, i _1,1 ) and the second dimension The second dimension index (ie i _1,2 ) is represented.

Specifically, the UE determines, according to the values of (N ₁ , N ₂ ), (O ₁ , O ₂ ), and configuration parameters, that Z bits are used to transmit the first PMI and the second PMI, and further, the UE indexes the first dimension. i _1,1 is jointly coded with the RI information to obtain a second joint code value; and the UE jointly encodes the second dimension index i _1,2 , the second index i ₂ and the CQI information to obtain a third joint code Finally, the UE will obtain the second union code value and the third union code value to be sent to the base station through Z bits in the PUCCH, so that the base station respectively according to the second union code value and the third union code value Determining the first index and the second index, and finally determining the precoding matrix W according to the first index and the second index.

Certainly, the UE may also jointly encode the second dimension index i _1,2 and the RI information to obtain a fourth union code value; further, the UE indexes the first dimension index i _1,1 , the second index i _{2 ,} and the CQI The information is jointly coded to obtain a fifth joint code value; finally, the UE will obtain the fourth joint code value and the fifth joint code value to be transmitted to the base station through Z bits in the PUCCH.

Exemplarily, the UE may receive an encoding indication sent by the base station, where the encoding indication may be used to indicate that the RI information is jointly encoded with the first dimension index i _1,1 or the second dimension index i _1,2 , so that the UE can be The encoding indicates selection to jointly encode the RI information with the first dimension index i _1,1 or the second dimension index i _1,2 .

Alternatively, the UE may determine, according to (N ₁ , N ₂ ) in the configuration parameter, a first dimension index i _1,1 or a second dimension index i _1,2 jointly encoded with the RI information, for example, when N ₁ < At N ₂ , it is determined that the RI information is jointly encoded with the first dimension index i _1,1 ; when N ₁ >N ₂ , the RI information is determined to be jointly encoded with the second dimension index i _1,2 because the antenna port The number of dimensions is smaller, and the precoding matrix corresponds to a wider beam, so that the beam variation frequency caused by the motion of the user is slower. Therefore, the PMI of the dimension with a smaller number of antenna ports (for example, the first dimension index i _{1, 1} ) Co-coding with RI information, both of which have slow-changing characteristics, can use a longer feedback period, so that the cost of RI and PMI feedback corresponding to this dimension can be saved.

The following is a detailed description of the detailed process of transmitting the first PMI and the second PMI by the UE according to Z bits for the values of different (N ₁ , N ₂ ), (O ₁ , O ₂ ) by using five examples.

Example 1: (N ₁ , N ₂ )=(2,4), (2,3), (O ₁ ,O ₂ )=(8,4)

At this time, the UE determines to use 5 bits for transmitting the first dimension index i _1,1 and RI information on the PUCCH. Specifically, as shown in Table 10, for the first dimension index i _1,1 , the UE will use the first dimension. The index i _1,1 is jointly encoded with the RI information to obtain a second joint code value; and further, the base station feeds back 5 bits in the PUCCH, so that the base station can obtain the second coded value according to the second and the table 10 The value of the corresponding first dimension index i _1,1 .

Table 10

In addition, the UE jointly encodes the second dimension index i _1,2 , the second index i _{2 ,} and the CQI information to obtain a third joint code value. When the configuration parameter is 2, as shown in Table 11, the UE uses 3 bits indicate the second dimension index i _1,2 , and 1 bit is used to indicate the second index (ie, the second PMI) i ₂ . At this time, the UE needs to transmit the first index and the second index by a total of 9 (ie, Z). = 5 + 4) number of bits.

Table 11

Or, in the case where the configuration parameter is 2, as shown in Table 12, the UE indicates the second dimension index i _1,2 using 2 bits, and indicates the second index (ie, the second PMI) i ₂ using 2 bits. At this time, the UE still needs 9 (ie, Z=5+4) number of bits to transmit the first index and the second index.

Table 12

In the case where the configuration parameter is 3 or 4, as shown in Table 13, the UE indicates the second dimension index i _1,2 using 2 bits, and indicates the second index (ie, the second PMI) i ₂ using 2 bits. At the time, the UE still needs 9 (ie, Z=5+4) number of bits to transmit the first index and the second index.

Table 13

Taking (N ₁ , N ₂ )=(2,4), (2,3), (O ₁ , O ₂ )=(8,4) as an example, the UE may also index the second dimension i1 _{first. 2} jointly coding with the RI information to obtain a fourth joint code value; as shown in Table 14, at this time, the UE determines to use 5 bits for transmitting the second dimension index i _{1, 2} and RI information on the PUCCH, specific The UE jointly encodes the second dimension index i _1,2 and the RI information to obtain a fourth joint code value, and further feeds back to the base station through 5 bits in the PUCCH, so that the base station according to the fourth joint code value and Table 14, the value of the corresponding second dimension index i _1,2 can be obtained.

Table 14

Alternatively, the UE determines to use 4 bits for transmitting the second dimension index i _1,2 and RI information on the PUCCH. As shown in Table 15, the UE jointly encodes the second dimension index i _1,2 and the RI information to obtain the first The quad sum code value is further fed back to the base station through 4 bits in the PUCCH, so that the base station can obtain the value of the corresponding second dimension index i _1,2 according to the fourth joint code value and Table 15.

Table 15

In addition, the UE jointly encodes the first dimension index i _1,1 , the second index i ₂ and the CQI information to obtain a fifth union code value. In the case that the configuration parameter is 2, as shown in Table 16, the UE uses The 3 bits indicate the first dimension index i _1,1 , and the 1st bit is used to indicate the second index (ie, the second PMI) i ₂ .

Table 16

Still alternatively, in the case where the configuration parameter is 2, as shown in Table 17, the UE indicates the first dimension index i _1,1 using 2 bits, and indicates the second index (ie, the second PMI) i ₂ using 2 bits.

Table 17

Example 2: (N ₁ , N ₂ )=(2,4), (2,3), (O ₁ ,O ₂ )=(8,8)

In addition, the UE jointly encodes the second dimension index i _1,2 , the second index i _{2 ,} and the CQI information to obtain a third joint code value. When the configuration parameter is 2, as shown in Table 11, the UE uses The 3 bits indicate the second dimension index i _1,2 , and the 1st bit is used to indicate the second index (ie, the second PMI) i ₂ .

Taking (N ₁ , N ₂ )=(2,4), (2,3), (O ₁ , O ₂ )=(8,8) as an example, the UE may also index the second dimension i1 _{first. 2} jointly coding with the RI information to obtain a fourth joint code value; as shown in Table 18, at this time, the UE determines to use 6 bits for transmitting the second dimension index i _{1, 2} and RI information on the PUCCH, specifically The UE jointly encodes the second dimension index i _1,2 and the RI information to obtain a fourth joint code value, and further feeds back to the base station through 6 bits in the PUCCH, so that the base station according to the fourth joint code value and Table 14, the value of the corresponding second dimension index i _1,2 can be obtained.

Table 18

Or, as shown in Table 19, the UE determines to use 5 bits for transmitting the second dimension index i _1,2 and RI information on the PUCCH. Specifically, the UE jointly encodes the second dimension index i _1,2 and the RI information. Obtaining a fourth joint code value; further, feeding back to the base station by using 5 bits in the PUCCH, so that the base station can obtain the corresponding second dimension index i _1,2 according to the fourth joint code value and Table 19. value.

Table 19

Example 3: (N ₁ , N ₂ )=(4,2)/(3,2), (O ₁ ,O ₂ )=(8,4)

At this time, the UE determines to use 6 bits for transmitting the first dimension index i _1,1 and RI information on the PUCCH. Specifically, as shown in Table 20, for the first dimension index i _1,1 , the UE will use the first dimension. The index i _1,1 is jointly encoded with the RI information to obtain a second joint code value; and further, the base station feeds back 6 bits in the PUCCH, so that the base station can obtain the second coded value according to the second and the table 20 The value of the corresponding first dimension index i _1,1 .

Table 20

Alternatively, the UE determines to use 5 bits for transmitting the first dimension index i _1,1 and RI information on the PUCCH. Specifically, as shown in Table 21, for the first dimension index i _1,1 , the UE indexes the first dimension i _1,1 and RI information are jointly encoded to obtain a second joint code value; and further, 5 bits in the PUCCH are fed back to the base station, so that the base station can obtain the corresponding according to the second joint code value and Table 21. The first dimension indexes the value of i _1,1 .

Table 21

In addition, the UE jointly encodes the second dimension index i _1,2 , the second index i ₂ and the CQI information to obtain a third joint code value. As shown in Table 13, the UE uses 2 bits to indicate the second dimension index i _{1 . 2} , using 2 bits to indicate the second index (ie the second PMI) i ₂ .

Taking (N ₁ , N ₂ )=(4, 2)/(3, 2), (O ₁ , O ₂ )=(8, 4) as an example, the UE may also index the second dimension i1 _{first. 2} jointly coding with the RI information to obtain a fourth joint code value; as shown in Table 22, at this time, the UE determines to use 4 bits for transmitting the second dimension index i _{1, 2} and RI information on the PUCCH, specifically The UE jointly encodes the second dimension index i _1,2 and the RI information to obtain a fourth joint code value, and further feeds back to the base station by using 4 bits in the PUCCH, so that the base station according to the fourth joint code value and Table 22, the value of the corresponding second dimension index i _1,2 can be obtained.

Table 22

In addition, the UE jointly encodes the first dimension index i _1,1 , the second index i ₂ and the CQI information to obtain a fifth union code value. As shown in Table 16, the UE uses 3 bits to indicate the first dimension index i _{1 . , 1} , using 1 bit to indicate the second index (ie, the second PMI) i ₂ .

Example 4: (N ₁ , N ₂ )=(4,2)/(3,2), (O ₁ ,O ₂ )=(4,4)

Alternatively, the UE determines to use 4 bits for transmitting the first dimension index i _1,1 and RI information on the PUCCH. Specifically, as shown in Table 23, the UE jointly encodes the first dimension index i _1,1 and the RI information. Obtaining a second union code value; further, feeding back to the base station by using 4 bits in the PUCCH, so that the base station can obtain the corresponding first dimension index i _1,1 according to the second union code value and Table 23. value

Table 23

In addition, the UE jointly encodes the second dimension index i _1,2 , the second index i ₂ and the CQI information to obtain a third joint code value. As shown in Table 13, the UE uses 2 bits to indicate the second dimension index i _{1 . 2} , using 2 bits to indicate the second index i ₂ (ie the second PMI).

Taking (N ₁ , N ₂ )=(4, 2)/(3, 2), (O ₁ , O ₂ )=(4, 4) as an example, the UE may also index the second dimension i1 _{first. 2} jointly coding with the RI information to obtain a fourth joint code value; as shown in Table 22, at this time, the UE determines to use 4 bits for transmitting the second dimension index i _{1, 2} and RI information on the PUCCH, specifically The UE jointly encodes the second dimension index i _1,2 and the RI information to obtain a fourth joint code value, and further feeds back to the base station by using 4 bits in the PUCCH, so that the base station according to the fourth joint code value and Table 22, the value of the corresponding second dimension index i _1,2 can be obtained.

In addition, the UE jointly encodes the first dimension index i _1,1 , the second index i ₂ and the CQI information to obtain a fifth union code value. In the case that the configuration parameter is 2, as shown in Table 16, the UE uses The 3 bits indicate the first dimension index i _1,1 , and the 1st bit is used to indicate the second index (ie, the second PMI) i ₂ . Still alternatively, as shown in Table 17, the UE indicates the first dimension index i _1,1 using 2 bits and the second index (ie, the second PMI) i ₂ using 2 bits.

So far, the embodiment of the present invention provides a method for transmitting a precoding matrix index, and defines a new sub-mode of PUCCH mode 1-1. Specifically, the UE receives configuration information and pilot information sent by the base station, and the configuration the configuration information includes a parameter, the number of two-dimensional antenna the first antenna port in a first dimension N ₁ - _1, the first and second antenna ports O oversampling factor in a second dimension N ₂ and the second oversampling factor O _2; Further, the UE information according to the pilot frequency, determining a first precoding matrix configured precoding matrix W W ₁ and a second precoding matrix W _2, and, according to the configuration information of the UE, determining a transmission on PUCCH The number of bits of the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ is Z, Z>0, such that the UE passes the Z bits in the PUCCH, and the first index And transmitting, to the base station, the second index, that is, the UE may determine, according to the foregoing configuration information sent by the base station, the number of bits used for transmitting the precoding matrix index on the PUCCH, that is, in the newly defined submode. Transmission precoding moment The number of bits used by the index may change according to the configuration parameters and flexible configuration to achieve PUCCH transmission by a precoding matrix index in the two-dimensional antenna scenario.

Example 3

For the first mode, in order to ensure that the PUCCH mode 1-1 sub-mode 1 and the sub-mode 2 are used to transmit the precoding matrix index by using a fixed number of bits, and the application scenario of the two-dimensional antenna is satisfied, the embodiment of the present invention provides The transmission device of the precoding matrix index may be configured according to configuration information sent by the base station (ie, configuration parameters, the number of first antenna ports N _{1 of the} two-dimensional antenna in the first dimension and the first oversampling factor O ₁ , and in the second dimension The second antenna port number N ₂ and the second oversampling factor O ₂ ) are used to downsample the P candidate column vectors to obtain K column vectors constituting the precoding matrix W, since 0<K≤ 64≤P, so that the UE can be configured to a first precoding matrix W ₁ and W ₂ second precoding matrix obtained from downsampling the K column vector on the basis of the existing 3GPP protocol, and to use the existing transmission mode The first PMI and the second PMI are transmitted on the PUCCH. As shown in FIG. 6, the device specifically includes:

The receiving unit 11 is configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, And a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension;

The sampling unit 12 is configured to downsample the P candidate column vectors according to the configuration information, to obtain K column vectors constituting the precoding matrix W, where 0<K≤64 ≤P;

a determining unit 13 configured to determine, according to the pilot information, a first precoding matrix W ₁ and a second precoding matrix W ₂ that construct the precoding matrix W from the K column vectors, where Precoding matrix W = W ₁ * W ₂ ;

The sending unit 14 is configured to send, by using a PUCCH, the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ to the base station, so that the base station according to the The first index and the second index determine the precoding matrix W.

Further, the first vector set includes a first dimension candidate vector set v _l and a second dimension candidate vector set u _k , and the determining unit 13 is further configured to determine the downsampled according to the configuration information. The sampling unit 12 is configured to collect L first dimension vectors from the first dimension of the candidate vector set v _l according to the sampling frequency.

L*J=K, L, J, l', k' are all integers greater than or equal to zero.

Further, as shown in FIG. 7 , the device further includes a calculating unit 15 , specifically, the calculating unit 15 is configured to calculate, according to the first oversampling factor O ₁ , by using a first sampling formula Collecting the first dimension vector in the first dimension candidate vector set v _l a sampling frequency; and, according to the second oversampling factor O ₂ , calculating a second dimensional vector from the second set of candidate vectors u _k by the first sampling formula

Sampling frequency.

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

Or the calculating unit 15 is configured to collect, according to the configuration information, the first dimension vector from the first dimension of the candidate vector set v _l by using a second sampling formula.

Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

Further, the calculating unit 15 is further configured to calculate the first dimension candidate vector set v _l according to the configuration information,

Further, the determining unit 13 is specifically configured to determine, according to the pilot information, the first precoding matrix W ₁ from the K column vectors; and, according to the configuration parameter, from the first column vector of the precoding matrix W ₁ is determined in the second precoding matrix W _2.

Further, the sending unit 14 is specifically configured to pass the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ by using a PUCCH mode 1-1 submode 1 Sent to the base station.

Or the sending unit 14 is specifically configured to send, by using the PUCCH mode 1-1 sub-mode 2, the first index of the first pre-coding matrix W ₁ and the second index of the second pre-coding matrix W ₂ To the base station.

Further, the sending unit 14 is further configured to receive, by using RRC signaling, the configuration information sent by the base station.

The transmission device of the precoding matrix index may be a UE (user setting) Prepare).

Illustratively, FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. The user equipment provided by the embodiment of the present invention may be used to implement the method implemented by the embodiments of the present invention shown in FIG. 1 to FIG. For the convenience of description, only parts related to the embodiments of the present invention are shown. Without specific details, please refer to the embodiments of the present invention shown in FIGS.

Specifically, as shown in FIG. 8, the user equipment includes a processor 21, a memory 22, a transceiver 23, and a bus 24, and the processor 21, the transceiver 23, and the memory 22 are connected by the bus 14 and complete communication with each other.

The memory 22 is configured to store the first vector set, where the first vector set includes P candidate column vectors for constructing the precoding matrix W, 64≤P; the processor 11 can be configured to execute the sampling unit. The specific function of the determining unit 13 and the calculating unit 15; the transceiver 23 can be used to perform the specific functions of the receiving unit 11 and the transmitting unit 14, and therefore will not be described herein.

It should be noted that the processor 21 herein may be a processor or a collective name of multiple processing elements. For example, the processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. For example, one or more digital singal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The memory 22 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 22 (or the memory 23) may include a random access memory (RAM), and may also include a non-volatile memory such as a magnetic disk memory, a flash memory, or the like.

The bus 24 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industry standard architecture (Extended Industry Standard). Architecture, EISA) bus, etc. Can be specifically divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is shown in Figure 8, but it does not mean that there is only one bus or one type of bus.

So far, an embodiment of the present invention provides a precoding matrix index transmission apparatus, where the UE includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P. Specifically, the UE receives configuration information sent by the base station and pilot information, the configuration information includes configuration parameters, the number of two-dimensional antenna the first antenna port in a first dimension of the first through N ₁ - _1, and the number of sampling factor of the second antenna port in a second dimension of the O N ₂ And the second oversampling factor O ₂ ; the UE downsamples the P candidate column vectors according to the configuration information, and obtains K column vectors constituting the precoding matrix W, 0<K≤64≤P; it can be seen that By downsampling, no more than 64 column vectors are selected from the original P candidate column vectors to form the precoding matrix W. Further, the UE can use the existing 3GPP protocol to determine from the K column vectors according to the pilot information. Constructing a first precoding matrix W ₁ and a second precoding matrix W _{2 of the} precoding matrix W, wherein the precoding matrix W=W ₁ *W ₂ ; and the first index of the first precoding matrix W ₁ through the PUCCH And transmitting a second index of the second precoding matrix W ₂ to the base The station is configured to transmit the precoding matrix index through the PUCCH in the application scenario of the two-dimensional antenna.

Example 4

For the foregoing method 2, in order to solve the problem of how to transmit a precoding matrix index (ie, a first PMI and a second PMI) on a PUCCH in an application scenario for a two-dimensional antenna, the precoding matrix index transmission apparatus provided by the present invention, The sub-mode of the newly defined PUCCH mode 1-1 in the second embodiment, wherein the UE can determine the number of bits used for transmitting the precoding matrix index on the PUCCH according to the foregoing configuration information sent by the base station, that is, In the newly defined sub-mode, the number of bits used for transmitting the precoding matrix index may be flexibly configured according to the change of the configuration information, and may be applicable to the transmission of the precoding matrix index in the application scenario of the two-dimensional antenna. As shown in FIG. 9, the device specifically includes:

The receiving unit 31 is configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N ₁ and a first oversampling factor O _{1 of the} two-dimensional antenna in the first dimension, And a second antenna port number N ₂ and a second oversampling factor O ₂ in the second dimension;

Determining unit 32, based on the pilot information for determining a first precoding matrix configured precoding matrix W W ₁ and a second precoding matrix W _2, wherein the precoding matrix W = W ₁ * W ₂ And determining, according to the configuration information, the first index for transmitting the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ on the physical uplink control channel PUCCH The number of bits is Z, Z>0;

The sending unit 33 is configured to send, by using the PUCCH, the first index and the second index to the base station according to the number of Z bits, so that the base station is configured according to the first index and the first The two indices determine the precoding matrix W.

Further, the UE includes a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64≤P, wherein the determining unit 32 is specifically used Determining RI information and CQI information with the base station according to the pilot information; and determining, according to the RI information, a first pre-configuration of the precoding matrix W from the P candidate column vectors The coding matrix W ₁ and the second precoding matrix W ₂ .

Further, as shown in FIG. 10, the apparatus further comprising a joint coding unit 34, the joint encoding unit 34, a first W for the first precoding matrix index ₁ and the RI information is jointly encoded Obtaining a first joint code value, where the sending unit 33 is further configured to send, by using the PUCCH, the first joint code value of Z1 bits to the base station by using the PUCCH; The PUCCH transmits a second index of the second precoding matrix W ₂ of Z2 bits and the CQI information to the base station, Z1+Z2=Z, Z1>0, and Z2>0.

Further, the first index includes a first dimension index in a first dimension and a second dimension index in a second dimension, where the joint encoding unit 34 is further configured to index the first dimension Performing joint coding with the RI information to obtain a second union code value; and jointly coding the second dimension index, the second index, and the CQI information to obtain a third union code value; The transmitting unit 33 is further configured to send the second joint code value and the third joint code value to the base station by using the PUCCH according to the number of Z bits.

Or the joint coding unit 34 is further configured to jointly encode the second dimension index and the RI information to obtain a fourth union code value; and, the first dimension index, the first The second index and the CQI information are jointly encoded to obtain a fifth joint code value, and the sending unit 33 is further configured to obtain the fourth joint code value and the fifth according to the Z number of bits. The union code value is transmitted to the base station through the PUCCH.

Further, the receiving unit 31 is further configured to receive an encoding indication sent by the base station, where the encoding indication is used to indicate that the RI information is jointly encoded with the first dimension index or the second dimension index.

The transmission device of the precoding matrix index may be a UE (user equipment).

Illustratively, FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. The user equipment provided by the embodiment of the present invention may be used to implement the method implemented by the embodiments of the present invention shown in FIG. 1 to FIG. For the convenience of description, only parts related to the embodiments of the present invention are shown. Without specific details, please refer to the embodiments of the present invention shown in FIGS.

Specifically, as shown in FIG. 11, the user equipment includes a processor 41, a memory 42, a transceiver 43, and a bus 44. The processor 41, the transceiver 43, and the memory 42 are connected by a bus 44 and complete communication with each other.

The memory 42 may be configured to store the first set of vectors, where the first set of vectors includes P candidate column vectors for constructing the precoding matrix W, 64≤P; the processor 41 may be configured to execute the determining unit. 32 and the specific function of the joint coding unit 34; the transceiver 43 can be used to perform the specific functions of the receiving unit 41 and the sending unit 44, and therefore will not be described herein.

It should be noted that the processor 41 herein may be a processor or a collective name of multiple processing elements. For example, the processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. , for example: one or more microprocessors (digital singnal processor, DSP), or one or more Field Programmable Gate Arrays (FPGAs).

The memory 42 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 22 (or the memory 23) may include a random access memory (RAM), and may also include a non-volatile memory such as a magnetic disk memory, a flash memory, or the like.

The bus 44 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Can be specifically divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

So far, an embodiment of the present invention provides a precoding matrix index transmission apparatus, which defines a new sub-mode of PUCCH mode 1-1. Specifically, the UE receives configuration information and pilot information sent by the base station, and the configuration the configuration information includes a parameter, the number of two-dimensional antenna the first antenna port in a first dimension N ₁ - _1, the first and second antenna ports O oversampling factor in a second dimension N ₂ and the second oversampling factor O _2; Further, the UE information according to the pilot frequency, determining a first precoding matrix configured precoding matrix W W ₁ and a second precoding matrix W _2, and, according to the configuration information of the UE, determining a transmission on PUCCH The number of bits of the first index of the first precoding matrix W ₁ and the second index of the second precoding matrix W ₂ is Z, Z>0, such that the UE passes the Z bits in the PUCCH, and the first index And transmitting, to the base station, the second index, that is, the UE may determine, according to the foregoing configuration information sent by the base station, the number of bits used for transmitting the precoding matrix index on the PUCCH, that is, in the newly defined submode. Transmission precoding moment The number of bits used by the index may change according to the configuration parameters and flexible configuration, the PUCCH transmission in order to achieve a pre-coding matrix index by application scenario of the two-dimensional antenna.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of the above functional modules is illustrated. In practical applications, The above functions are allocated by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, 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 a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, and a read-only memory. A medium that can store program code, such as a ROM (Read-Only Memory), a random access memory (RAM), a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for transmitting a precoding matrix index, wherein a UE includes a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P, The methods include:

Receiving, by the UE, configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N 1 and a first oversampling factor O 1 of the two-dimensional antenna in the first dimension, and a second antenna port number N 2 and a second oversampling factor O 2 in two dimensions;

The UE downsamples the P candidate column vectors according to the configuration information, to obtain K column vectors constituting the precoding matrix W, 0<K≤64≤P;

Determining, by the UE, the first precoding matrix W 1 and the second precoding matrix W 2 that construct the precoding matrix W from the K column vectors according to the pilot information, where the precoding matrix W = W 1 * W 2 ;

Transmitting, by the UE, a first index of the first precoding matrix W 1 and a second index of the second precoding matrix W 2 to the base station by using a physical uplink control channel PUCCH, such that the base station The precoding matrix W is determined according to the first index and the second index.
The method according to claim 1, wherein the first set of vectors comprises a first dimension candidate vector set v l and a second dimension candidate vector set u k ,

The UE performs downsampling on the P candidate column vectors according to the configuration information, to obtain K column vectors constituting the precoding matrix, including:

Determining, by the UE, the sampling frequency of the down sampling according to the configuration information;

Collecting, by the UE, L first dimension vectors from the first dimension candidate vector set v l according to the sampling frequency
Collecting J second dimension vectors from the second dimension candidate vector set u k
L*J=K, L, J, l', k' are all integers greater than or equal to zero.
The method according to claim 2, wherein the determining, by the UE, the sampling frequency of the downsampling according to the configuration information comprises:

And acquiring, by the first sampling factor O 1 , the first dimension vector from the first dimension of the candidate vector set v l according to the first sampling factor
Sampling frequency

The UE calculates a second dimension vector from the second dimension candidate vector set u k by using the first sampling formula according to the second oversampling factor O 2
Sampling frequency.
The method of claim 3 wherein:

When the number of antenna ports is 12 or 16, the first sampling formula is:

Or the first sampling formula is:

When the number of antenna ports is 8, the first sampling formula is:

Wherein l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N 1 * N 2 * the number of polarization directions.
The method according to claim 2, wherein the determining, by the UE, the sampling frequency of the downsampling according to the configuration information comprises:

And acquiring, by the UE, the first dimension vector from the first dimension of the candidate vector set v l according to the configuration information by using a second sampling formula

The UE collects a second dimension vector from the second dimension candidate vector set u k by using the second sampling formula according to the configuration information.
The method of claim 5 wherein:

When the number of antenna ports is 16 or 12, if O 1 =O 2 and N 1 <N 2 , the second sampling formula is:
Otherwise, the second sampling formula is:

When the number of antenna ports is 8, the second sampling formula is:

Wherein l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N 1 * N 2 * the number of polarization directions.
The method according to any one of claims 2-6, after the receiving, by the UE, the configuration information and the pilot information sent by the base station, the method further includes:

The UE calculates the first dimension candidate vector set v l according to the configuration information,

The UE calculates the second dimension candidate vector set u k according to the configuration information,
The method according to any one of claims 1 to 7, wherein the UE determines, according to the pilot information, a first precoding matrix that constructs the precoding matrix from the K column vectors. W 1 and a second precoding matrix W 2 include:

Determining, by the UE, the first precoding matrix W 1 from the K column vectors according to the pilot information;

The UE determines the second precoding matrix W 2 from the column vectors of the first precoding matrix W 1 according to the configuration parameter.
The method according to any one of claims 1 to 8, wherein the UE passes the first index of the first precoding matrix W 1 and the second precoding matrix W 2 by using a PUCCH. Sending the second index to the base station includes:

The UE transmits the first index of the first precoding matrix W 1 and the second index of the second precoding matrix W 2 to the base station by using PUCCH mode 1-1 submode 1.
The method according to any one of claims 1 to 8, wherein the UE passes the first index of the first precoding matrix W 1 and the second precoding matrix W 2 by using a PUCCH. Sending the second index to the base station includes:

The UE transmits a first index of the first precoding matrix W 1 and a second index of the second precoding matrix W 2 to the base station by using a PUCCH mode 1-1 submode 2.
The method according to any one of claims 1-10, wherein the receiving, by the UE, configuration information sent by the base station includes:

The UE receives the configuration information sent by the base station by using radio resource control RRC signaling.
A method for transmitting a precoding matrix index, comprising:

Receiving, by the UE, configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N 1 and a first oversampling factor O 1 of the two-dimensional antenna in the first dimension, and a second antenna port number N 2 and a second oversampling factor O 2 in two dimensions;

The UE determines, according to the pilot information, a first precoding matrix W 1 and a second precoding matrix W 2 that construct a precoding matrix W, where the precoding matrix W=W 1 *W 2 ;

Determining, according to the configuration information, the first index used by the first uplink precoding matrix W 1 and the second index of the second precoding matrix W 2 on the physical uplink control channel PUCCH The number of bits is Z, Z>0;

Sending, by the PUCCH, the first index and the second index to the base station according to the number of Z bits, so that the base station determines, according to the first index and the second index, The precoding matrix W.
The method according to claim 12, wherein the UE includes a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P,

The determining, by the UE, the first precoding matrix W 1 and the second precoding matrix W 2 that construct the precoding matrix W according to the pilot information, including:

Determining, by the UE, rank indication RI information and channel quality indication CQI information with the base station according to the pilot information;

Determining, by the UE, the first precoding matrix W 1 and the second precoding matrix W 2 that construct the precoding matrix W from the P candidate column vectors according to the RI information.
The method according to claim 13, wherein the UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, including:

The UE jointly encodes the first index of the first precoding matrix W 1 and the RI information to obtain a first union code value;

Transmitting, by the UE, the first joint coded value of Z1 bits to the base station by using the PUCCH by using the PUCCH;

Transmitting, by the PUCCH, a second index of the second precoding matrix W 2 of Z2 bits and the CQI information to the base station, where Z1+Z2=Z, Z1>0, Z2>0 .
The method according to claim 13, wherein the first index comprises a first dimension index in a first dimension and a second dimension index in a second dimension,

The UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, including:

The UE jointly encodes the first dimension index and the RI information to obtain a second union code value;

The UE jointly encodes the second dimension index, the second index, and the CQI information to obtain a third union code value;

Transmitting, by the UE, the second union code value and the third union code value to the base station by using the PUCCH according to the number of Z bits.
The method according to claim 13, wherein the first index comprises a first dimension index in a first dimension and a second dimension index in a second dimension,

The UE sends the first index and the second index to the base station according to the number of Z bits by using the PUCCH, including:

The UE jointly encodes the second dimension index and the RI information to obtain a fourth union code value;

The UE jointly encodes the first dimension index, the second index, and the CQI information to obtain a fifth union code value;

And the UE sends the obtained fourth joint code value and the fifth joint code value to the base station by using the PUCCH according to the number of Z bits.
The method according to claim 15 or 16, wherein before the UE transmits the first index and the second index to the base station according to the number of Z bits by using the PUCCH, include:

The UE receives an encoding indication sent by the base station, where the encoding indication is used to indicate that the RI information is jointly encoded with the first dimension index or the second dimension index.
A user equipment (UE), the UE includes: a processor, a memory, and a transceiver, where

The memory is configured to store a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P;

The transceiver is configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N 1 of the two-dimensional antenna in the first dimension, and a first oversampling factor O 1 And a second antenna port number N 2 and a second oversampling factor O 2 in the second dimension;

The processor is configured to perform downsampling on the P candidate column vectors according to the configuration information, to obtain K column vectors constituting the precoding matrix W, where 0<K≤64≤P; Deriving, from the K column vectors, a first precoding matrix W 1 and a second precoding matrix W 2 that construct the precoding matrix W, wherein the precoding matrix W=W 1 *W 2 ;

The transceiver is further configured through a physical uplink control channel PUCCH of the first pre-coding matrix W 1 of the first index and the second index of the second precoding matrix W 2 is transmitted to the base station, So that the base station determines the precoding matrix W according to the first index and the second index.
The UE according to claim 18, characterized in that

The processor is specifically configured to determine, according to the configuration information, a sampling frequency of the downsampling; and, according to the sampling frequency, collect L first dimensional vectors from a first set of candidate vector sets v l
Collecting J second-dimensional vectors from the second-dimensional candidate vector set u k
L*J=K, L, J, l', k' are integers greater than or equal to 0;

The first vector set includes a first dimension candidate vector set v l and a second dimension candidate vector set u k .
The UE according to claim 19, characterized in that

The processor is configured to: collect, according to the first oversampling factor O 1 , a first dimension vector from the first dimension of the candidate vector set v l by using a first sampling formula
a sampling frequency; and, according to the second oversampling factor O 2 , calculating a second dimensional vector from the second set of candidate vectors u k by the first sampling formula
Sampling frequency

Wherein, when the number of antenna ports is 12 or 16, the first sampling formula is:
Or the first sampling formula is:
When the number of antenna ports is 8, the first sampling formula is:
l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N 1 * N 2 * the number of polarization directions.
The UE according to claim 19, characterized in that

The processor is configured to collect a first dimension vector from the first dimension of the candidate vector set v l by using a second sampling formula according to the configuration information.
And acquiring, according to the configuration information, the second dimension vector from the second dimension of the candidate vector set u k by using the second sampling formula

Wherein, when the number of antenna ports is 16 or 12, if O 1 =O 2 and N 1 <N 2 , the second sampling formula is:
Otherwise, the second sampling formula is:
When the number of antenna ports is 8, the second sampling formula is:

l' is an integer greater than or equal to 0, k' is an integer greater than or equal to 0, and the number of antenna ports = N 1 * N 2 * the number of polarization directions.
The UE according to any one of claims 19 to 21, characterized in that

The processor is further configured to calculate, according to the configuration information, the first dimension candidate vector set v l ,
And calculating, according to the configuration information, the second dimension candidate vector set u k ,
The UE according to any one of claims 18 to 22, characterized in that

The processor is specifically configured to determine, according to the pilot information, the first precoding matrix W 1 from the K column vectors; and, from the first precoding matrix W according to the configuration parameter. 1 column vector determining the second precoding matrix W 2.
The UE according to any one of claims 18 to 23, characterized in that

The transceiver is specifically configured to send, by using a PUCCH mode 1-1 sub-mode 1, a first index of the first precoding matrix W 1 and a second index of the second precoding matrix W 2 to the Base station.
The UE according to any one of claims 18 to 23, characterized in that

The transceiver is specifically configured to send, by using a PUCCH mode 1-1 sub-mode 2, a first index of the first precoding matrix W 1 and a second index of the second precoding matrix W 2 to the Base station.
The UE according to any one of claims 18 to 25, characterized in that

The transceiver is specifically configured to receive, by using radio resource control RRC signaling, the configuration information sent by the base station.
A user equipment (UE), comprising: a processor, a memory, and a transceiver, wherein

The transceiver is configured to receive configuration information and pilot information sent by the base station, where the configuration information includes configuration parameters, a first antenna port number N 1 of the two-dimensional antenna in the first dimension, and a first oversampling factor O 1 And a second antenna port number N 2 and a second oversampling factor O 2 in the second dimension;

The processor is configured to determine, according to the pilot information, a first precoding matrix W 1 and a second precoding matrix W 2 that construct a precoding matrix W, where the precoding matrix W=W 1 *W And determining, according to the configuration information, a first index for transmitting the first precoding matrix W 1 and a second index of the second precoding matrix W 2 on a physical uplink control channel PUCCH The number of bits is Z, Z>0;

The transceiver is further configured to send, by using the PUCCH, the first index and the second index to the base station according to a number of Z bits, so that the base station is configured according to the first index and the The second index determines the precoding matrix W.
The UE according to claim 27, characterized in that

The memory is configured to store a first set of vectors, where the first set of vectors includes P candidate column vectors for constructing a precoding matrix W, 64 ≤ P;

The processor is specifically configured to determine, according to the pilot information, rank indication RI information and channel quality indication CQI information with the base station; and, according to the RI information, from the P candidate column vectors. Determining a first precoding matrix W 1 and a second precoding matrix W 2 that construct the precoding matrix W.
The UE according to claim 28, characterized in that

The processor is further configured to jointly encode the first index of the first precoding matrix W 1 and the RI information to obtain a first union code value;

The transceiver is further configured to send, by using the PUCCH, the first joint coded value of Z1 bits to the base station by using the PUCCH; and, by using the PUCCH, the Z2 bits of the The second index of the second precoding matrix W 2 and the CQI information are sent to the base station, Z1+Z2=Z, Z1>0, and Z2>0.
The UE according to claim 28, wherein the first index comprises a first dimension index in a first dimension and a second dimension index in a second dimension, wherein

The processor is further configured to jointly encode the first dimension index and the RI information to obtain a second union code value; and, the second dimension index, the second index, and the The CQI information is jointly encoded to obtain a third joint code value;

The transceiver is further configured to send the second union code value and the third union code value to the base station by using the PUCCH according to the number of Z bits.
The UE according to claim 28, wherein the first index comprises a first dimension index in a first dimension and a second dimension index in a second dimension, wherein

The processor is further configured to jointly encode the second dimension index and the RI information to obtain a fourth union code value; and, the first dimension index, the second index, and the The CQI information is jointly encoded to obtain a fifth joint code value;

The transceiver is further configured to send the obtained fourth joint code value and the fifth joint code value to the base station by using the PUCCH according to the number of Z bits.
The UE according to claim 30 or 31, characterized in that

The transceiver is further configured to receive an encoding indication sent by the base station, where the encoding refers to The indication is used to indicate that the RI information is jointly encoded with the first dimension index or the second dimension index.