CN101958779B - Retransmission method for transmission block triggered by physical hybrid automatic repeat request indicator channel and terminal - Google Patents

Abstract

The invention discloses a retransmission method for a transmission block triggered by a physical hybrid automatic repeat request (HARQ) indicator channel and a terminal. The retransmission method comprises the following steps that: the terminal pre-codes the transmission block to be retransmitted by adopting a set pre-coding matrix or vector, wherein the pre-coding matrix or vector is predefined according to the pre-coding matrix or vector which is indicated by a latest dispatching signaling; or the pre-coding matrix or vector is selected from a codebook or pre-coding matrix set for retransmission; and the terminal retransmits the pre-coded transmission block. By using the technical scheme of the invention, the transmission block can be effectively retransmitted on the premise of saving signaling expense.

Description

The repeating method of the transmission block that physics HARQ indicator channel triggers and terminal

Technical field

The present invention relates to the communications field, in particular to repeating method and the terminal of the transmission block of a kind of physical mixed HARQ technology (Hybrid Automatic Repeat Request, referred to as HARQ) indicator channel triggering.

Background technology

In wireless communications, if all adopt many antenna transmitting-receivings at transmitting terminal and receiving terminal, so, space multiplexing technique can be adopted obtain higher data rate, namely identical running time-frequency resource is used to send multiple data flow at transmitting terminal, and channel coefficient matrix can be obtained by channel estimating at receiving terminal, and then demodulate the data in each data flow.

At the evolution system (LTE-Advanced of future generation of LTE system, Long Term Evolution-Advanced system, referred to as LTE-A) in, in order to obtain higher data rate, lte-a system supports the configuration of up 4 transmitting antennas, employ spatial reuse (the single user Multiple Input Multiple Output of single user, referred to as SU-MIMO) technology, now, terminal is as transmitting terminal, and base station is as receiving terminal, transmitting terminal is up direction to the direction of receiving terminal.

Fig. 1 is the signal processing schematic diagram of the transmitting terminal of up employing SU-MIMO, as shown in Figure 1, terminal uplink Signal transmissions block (Transport Block, referred to as TB) 1 ~ transmission block K respectively through code modulation module, generated codeword (codeword) 0 ~ code word K-1; Code word 0 ~ code word K-1 obtains layer 0 ~ layer N-1 after carrying out code word to the mapping of layer, carries out discrete Fourier transform (Distributed Fourier Transform, referred to as DFT) and be converted to frequency-region signal from time-domain signal after layer interweaves; Then, after frequency domain carries out precoding processing, launch on multiple antennas to time domain through inverse discrete Fourier transform (Inverse Distributed Fourier Transform, referred to as IDFT).

Wherein, code word completes the mapping of code word to layer to the mapping block of layer for utilizing simple serial/parallel conversion, specifically can see Fig. 2.Fig. 2 is the schematic diagram that code word arrives the mapping method of layer.Below for 2 code words, 4 transmit antennas, carry out the function of simple declaration code word to the mapping block of layer.When 2 code words are mapped to 2 layers, code word 0 maps directly to the 1st layer, and code word 1 maps directly to the 2nd layer; When 2 code words are mapped to 3 layers, code word 0 maps directly to the 1st layer, and code word 1, by after serial/parallel conversion, is mapped to layers 2 and 3; When 2 code words are mapped to 4 layers, code word 0 is mapped to layers 1 and 2 by serioparallel exchange, and code word 1 is mapped to the 3rd layer and the 4th layer by serioparallel exchange.

Precoding module is used for, and the process in antenna territory, to the mapping of antenna, is converted to Beam Domain and processes by complete layer, utilizes known spatial channel information to carry out pretreatment operation at transmitting terminal, thus improves the throughput of user and system further.

In LTE system, Physical Downlink Control Channel (Physical downlink control channel, referred to as PDCCH) is for carrying uplink and downlink schedule information, and uplink power control information.Downlink Control Information (Downlink Control Information, referred to as DCI) form (format) be divided into following several: DCI format 0,1,1A, 1B, 1C, 1D, 2,2A, 3,3A etc., wherein, format 0 is used to indicate the scheduling of Physical Uplink Shared Channel (Physical uplink shared channel, referred to as PUSCH); DCI format 1,1A, 1B, 1C, 1D is used for the different transmission mode of the Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as PDSCH) of single transport block; DCI format 2,2A is used for the different transmission mode of space division multiplexing; DCIformat 3,3A is used for the transmission of the power control instruction of Physical Uplink Control Channel (Physical uplink control channel, referred to as PUCCH) and PUSCH.

LTE-A adopts based on code book (codebook, be also called code book) Linear Precoding (precoding), precoding technique is that one utilizes channel condition information (Channel Status Information, referred to as CSI) at transmitting terminal, preliminary treatment is carried out to signal, improve the technology of multiaerial system performance.A kind of approach of transmitting terminal acquisition CSI is the feedback by receiving terminal.In order to reduce feedback overhead, the general mode adopted preserves identical code book (codebook), i.e. pre-coding matrix collection at receiving terminal and transmitting terminal.Receiving terminal is according to current channel conditions, select the pre-coding matrix that is applicable in the codebook and by its index value (Precoding Matrix Index in set, referred to as PMI) feed back to transmitting terminal, transmitting terminal finds pre-coding matrix according to the pre-coding matrix index of feedback, and carries out precoding to transmission signal.The Mathematical Modeling of data precoding is y=HWs+n, and wherein, y is Received signal strength vector, and H is channel coefficient matrix, and W is pre-coding matrix, and s is signal phasor, and n is noise vector.For the 2 transmitting antenna terminals of LTE-A, use the pre-coding matrix shown in table 1; For the terminal of 4 transmitting antennas, then use the pre-coding matrix shown in table 2, table 3 and table 4, the pre-coding matrix of 4 transmitting antennas 4 layers is

Code book that the up 2 transmitting antenna spatial reuses of table 1 use (or be called transmission code book) for antenna port 0,1

Table 2: the up 4 transmitting antenna spatial reuse numbers of plies for 1 time use code book (or be called for antenna port 0,1,2,3 and the spatial reuse number of plies be 1 transmission code book)

Table 3: the up 4 transmitting antenna spatial reuse numbers of plies for 2 time use code book (or be called for antenna port 0,1,2,3 and the spatial reuse number of plies be 2 transmission code book)

Table 4: the up 4 transmitting antenna spatial reuse numbers of plies for 3 time use code book (or be called for antenna port 0,1,2,3 and the spatial reuse number of plies be 3 transmission code book)

Data for up link send, and lte-a system supports hybrid automatic repeat request technology (Hybrid Automatic Repeat Request, referred to as HARQ).HARQ retransmits for each transmission block, transmitting terminal is according to the feedback signaling to TB block fed back from receiving terminal, if for confirming (Acknowledgement, referred to as ACK) message, then show that receiving terminal correctly receives data, transmitting terminal now can send new data; If the signaling of feedback is non-acknowledgement (Negative Acknowledgement, referred to as NACK), then shows that receiving terminal does not correctly receive data, require transmitting terminal retransmission data.When two transmission blocks transmit simultaneously, each transmission block can have corresponding modulation coding mode and the DCI control information such as redundancy versions, new data instruction, and new data indicating bit is the new transmission block or the old transmission block of re-transmission that send first time for distinguishing the transmission block this time sent.Under current HARQ retransmission mechanism, when the correct error of transmission of TB block one transmission of last time transmission, can forbid during re-transmission that transmission is last and transmit correct TB block, only retransmit the TB block of makeing mistakes, the TB block at this time transmitted just becomes 1 by original 2, follow-up code word also can correspondingly change to the mapping of layer, more also will change through precoding module pre-coding matrix.

But, if base station is by physics HARQ indicator channel (PHICH, Physical hybrid ARQ indicator channel) trigger re-transmissions, base station does not have signaling indicating terminal to adopt which kind of PMI, which kind of pre-coding matrix is terminal adopt carry out precoding, is a problem demanding prompt solution.

Summary of the invention

For base station in correlation technique by physics HARQ indicator channel trigger re-transmissions, base station does not have signaling indicating terminal to adopt which kind of PMI, which kind of pre-coding matrix is terminal adopt carry out the problem of precoding and propose the present invention, for this reason, main purpose of the present invention is repeating method and the terminal of the transmission block providing a kind of physics HARQ indicator channel to trigger, to solve the problem one of at least.

According to an aspect of the present invention, provide the repeating method of the transmission block that a kind of physical mixed HARQ HARQ indicator channel triggers, comprise: the transmission block that terminal adopts the pre-coding matrix of setting or vector to treat re-transmission carries out precoding, wherein, pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch or vector and predefined pre-coding matrix or vector, or pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection; Terminal retransmits the transmission block after precoding.

According to another aspect of the present invention, provide a kind of terminal, comprise: precoding module, transmission block for adopting the pre-coding matrix of setting to treat re-transmission carries out precoding, wherein, pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch or vector and predefined pre-coding matrix or vector, or pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection; Retransmission module, for retransmitting the transmission block after precoding.

Pass through the present invention, the transmission block that terminal adopts the pre-coding matrix arranged to treat re-transmission carries out precoding, wherein, pre-coding matrix is set according to the pre-coding matrix that nearest dispatch (latest grant) indicates, or pre-coding matrix is set according to the pre-coding matrix of the code book be selected from for retransmitting or pre-coding matrix collection or vector; Terminal retransmits the transmission block after precoding.To solve in correlation technique base station by physics HARQ indicator channel trigger re-transmissions, base station does not have signaling indicating terminal to adopt which kind of PMI, which kind of pre-coding matrix is terminal adopt carry out the problem of precoding, and then can realize effective re-transmission of transmission block under the prerequisite of saving signaling consumption.

Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the signal transacting schematic diagram of the transmitting terminal of up employing SU-MIMO in correlation technique;

Fig. 2 is the schematic diagram that code word arrives the mapping method of layer;

Fig. 3 is the flow chart of the repeating method of the transmission block triggered according to the physics HARQ indicator channel of the embodiment of the present invention;

Fig. 4 is the structured flowchart of the terminal according to the embodiment of the present invention;

Fig. 5 is the structured flowchart of terminal according to the preferred embodiment of the invention.

Embodiment

It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.

Fig. 3 is the flow chart of the repeating method of the transmission block triggered according to the physics HARQ indicator channel of the embodiment of the present invention.As shown in Figure 3, the repeating method of the transmission block triggered according to the physics HARQ indicator channel of the embodiment of the present invention comprises following process:

Step S302: the transmission block that terminal adopts the pre-coding matrix of setting or vector to treat re-transmission carries out precoding, wherein, pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch (latest grant) or vector and predefined pre-coding matrix or vector, or pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection

Step S304: terminal retransmits the transmission block after precoding.

In correlation technique, base station is by physics HARQ indicator channel trigger re-transmissions, and base station does not have signaling indicating terminal to adopt which kind of PMI, and terminal cannot know the pre-coding matrix of transmission block to be retransmitted.Adopt method provided by the invention, by the pre-coding matrix indicated by nearest dispatch or vector, predefined pre-coding matrix or vector are set to the pre-coding matrix for treating retransmission block, or selecting the pre-coding matrix for treating retransmission block from the code book for retransmitting or pre-coding matrix collection, effective re-transmission of transmission block can be realized under the prerequisite of saving signaling consumption.

Preferably, arrange thinking based on the first, the pre-coding matrix indicated by nearest dispatch or vector arrange pre-coding matrix and mainly there are following two kinds of situations:

The first: when triggered by physics HARQ indicator channel when retransmission number of blocks is equal with the transmission block quantity of the nearest transmitting procedure with dispatch, it is identical with the number of plies indicated by nearest dispatch that the re-transmission number of plies is set, and it is identical with the pre-coding matrix indicated by nearest dispatch to arrange pre-coding matrix.

Such as, transmitted two transmission blocks last time, and during equal error of transmission, if need to retransmit these two transmission blocks, it is identical with the number of plies that the last time transmits that the re-transmission number of plies can be set, and it is identical with the pre-coding matrix indicated by nearest dispatch to arrange pre-coding matrix.

The second: when triggered by physics HARQ indicator channel be less than the transmission block quantity of the nearest transmitting procedure with dispatch until retransmission number of blocks time, the pre-coding matrix indicated by nearest dispatch or vector arrange current pre-coding matrix for treating retransmission block or vector.

Preferably, in the latter case, the pre-coding matrix indicated by nearest dispatch or vector arrange current pre-coding matrix for treating retransmission block or vector can comprise following process:

Choose the pre-coding matrix that comes from above-mentioned code book for retransmitting or pre-coding matrix collection or vector as current pre-coding matrix for treating retransmission block or vector.

Preferably, in the latter case, when terminal supports at most 2 transmit antennas, pre-coding matrix is set and can comprises one of following:

(1) pre-coding matrix used when a pre-coding matrix in up 2 transmitting antenna 1 layer of code book being set to current re-transmission.

Preferably, this matrix can be

(2) circulate pre-coding matrix successively that used as each re-transmission by all or part of pre-coding matrix in up 2 transmitting antenna 1 layer of code book.

Preferably, the part pre-coding matrix in above-mentioned up 2 transmitting antenna 1 layer of code book can comprise: and

Below in conjunction with example one, above-mentioned preferred implementation is described.

Example one

When terminal supports at most 2 transmit antennas, the pre-coding matrix used when the fixing some pre-coding matrixes in up 2 transmitting antenna 1 layer of code book are set to current re-transmission, preferably, this pre-coding matrix can be or in retransmission processes repeatedly, recycle this 3 pre-coding matrixes successively:

Preferably, in the latter case, terminal supports at most 4 transmit antennas and the nearest transmitting procedure with dispatch employs 2 layers of pre-coding matrix when carrying out precoding, arranges pre-coding matrix and can comprise one of following:

(1) arranging for the pre-coding matrix retransmitted is the matrix that 4 row 1 arrange, wherein, this matrix contains the kth row nonzero element of the nearest up 4 transmitting antennas 2 layers of pre-coding matrix used with the transmitting procedure of dispatch, and k is the call number 1 or 2 treating retransmission block;

(2) from up 4 transmitting antenna 1 layer of code book, select a pre-coding matrix as the pre-coding matrix arranged, wherein, the pre-coding matrix of selection and the kth column vector of the nearest up 4 transmitting antennas 2 layer pre-coding matrix used with the transmitting procedure of dispatch have minimum string distance.

Below in conjunction with example two, above-mentioned preferred implementation is described.

Example two

When supporting at most 4 transmit antennas when terminal and use in the nearest transmitting procedure with dispatch 2 layers of pre-coding matrix to carry out precoding, if what retransmit is a kth transmission block or a kth code word (k is 1 or 2), pre-coding matrix when then arranging re-transmission is the matrix that 4 row 1 arrange, this matrix contains the kth row nonzero element of 2 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses, or this matrix be selected from the up 4 transmitting antenna spatial reuse numbers of plies for 1 time the code book that uses in a pre-coding matrix, and the kth column vector of this pre-coding matrix and the nearest transmitting procedure with dispatch 2 layers of pre-coding matrix used has minimum string distance.

Such as, if k is 1, then the 1st transmission block or code word are at antenna port { re-transmission code book when the multiplexing number of plies of 0,1,2,3} is 1 (wherein, first multiplexing number of plies when passing is 2) as shown in table 5, or to retransmit code book be the subset of table 5.

Such as, if k is 2, then the 2nd transmission block or code word are at antenna port { re-transmission code book when the multiplexing number of plies of 0,1,2,3} is 1 (wherein, first multiplexing number of plies when passing is 2) as shown in table 6, or to retransmit code book be the subset of table 6.

Table 5

Table 6

Preferably, in the latter case, terminal support at most 4 transmit antennas and the nearest transmitting procedure with dispatch uses 3 layers of pre-coding matrix to carry out precoding time, pre-coding matrix is set and can comprises following process:

(1) if transmission block to be retransmitted is the 1st transmission block, then arranging and retransmitting the pre-coding matrix used is the matrix that 4 row 1 arrange, wherein, this matrix contains the 1st row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses; Or from up 4 transmitting antenna 1 layer of code book, select a pre-coding matrix as the pre-coding matrix arranged, wherein, the 1st column vector of the pre-coding matrix of selection and the nearest transmitting procedure with dispatch 3 layers of pre-coding matrix used has minimum string distance;

(2) if transmission block to be retransmitted is the 2nd transmission block, then arranging and retransmitting the pre-coding matrix used is the matrix that 4 row 2 arrange, wherein, this matrix contains the 2nd row and the 3rd row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses; Or from up 4 transmitting antenna 2 layers of code book, select a pre-coding matrix as the pre-coding matrix arranged, wherein, the matrix that the 2nd column vector of 3 layers of pre-coding matrix that uses of the pre-coding matrix of selection and the nearest transmitting procedure with dispatch and the 3rd column vector form has minimum string distance.

Below in conjunction with example three, above-mentioned preferred implementation is described.

Example three

When supporting at most 4 transmit antennas when terminal and use in the nearest transmitting procedure with dispatch 3 layers of pre-coding matrix to carry out precoding, if what retransmit is the 1st transmission block or code word, pre-coding matrix when then arranging re-transmission is the matrix that 4 row 1 arrange, this matrix contains the 1st row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses, or this matrix be selected from the up 4 transmitting antenna spatial reuse numbers of plies for 1 time the code book that uses in a pre-coding matrix, and the 1st column vector of this pre-coding matrix and the nearest transmitting procedure with dispatch 3 layers of pre-coding matrix used has minimum string distance, if what retransmit is the 2nd transmission block or code word, pre-coding matrix when then arranging re-transmission is the matrix that 4 row 2 arrange, this matrix contains the 2nd row and the 3rd row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses, or this matrix be selected from the up 4 transmitting antenna spatial reuse numbers of plies for 2 time the code book that uses in a pre-coding matrix, and the matrix that the 2nd column vector of this pre-coding matrix and the nearest transmitting procedure with dispatch 3 layers of pre-coding matrix used and the 3rd column vector form has minimum string distance.

Such as, the 1st transmission block or code word antenna port re-transmission code book when the multiplexing number of plies of 0,1,2,3} is 1 as shown in table 7 (first pass time the multiplexing number of plies be 3), or to retransmit code book be the subset of table 7.

Such as, the 2nd transmission block or code word antenna port re-transmission code book when the multiplexing number of plies of 0,1,2,3} is 1 as shown in table 8 (first pass time the multiplexing number of plies be 3), or to retransmit code book be the subset of table 8.

Table 7

Table 8

Preferably, in the latter case, terminal support at most 4 transmit antennas and the nearest transmitting procedure with dispatch uses 4 layers of pre-coding matrix to carry out precoding time, pre-coding matrix is set and can comprises one of following:

(1) of setting in following pre-coding matrix set is the pre-coding matrix arranged: $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& -1\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& -1\\ 1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 0& 1\\ 1& 0\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 0& -1\\ -1& 0\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& -1\\ 0& 1\\ -1& 0\end{array}\right];$

(2) circulate pre-coding matrix successively that used as each re-transmission by a pre-coding matrix in three of pre-coding matrix set pre-coding matrixes.

Below in conjunction with example four, above-mentioned preferred implementation process is described.

Example four

When supporting at most 4 transmit antennas when terminal and use in the nearest transmitting procedure with dispatch 4 layers of pre-coding matrix to carry out precoding, then pre-coding matrix when arranging re-transmission is fix certain 1 in these 9 matrixes, or in repeatedly retransmission processes, of recycling successively in certain 3 in these 9 pre-coding matrixes retransmits as each time the pre-coding matrix used.

In preferred implementation process, based on the second, thinking is set, when triggered by physics HARQ indicator channel be less than the transmission block quantity of the nearest transmitting procedure with dispatch until retransmission number of blocks time, concentrate from the code book for retransmitting or pre-coding matrix and choose pre-coding matrix or vector to arrange pre-coding matrix, wherein, be made up of one or more matrix for the code book that retransmits or pre-coding matrix collection, when the code book for retransmitting or pre-coding matrix collection are made up of a matrix, fixing this pre-coding matrix of use when retransmitting, when precoding codebook is made up of multiple matrix, multiple pre-coding matrix is recycled successively in repeatedly retransmission processes.

In preferred implementation process, when terminal supports at most 2 transmit antennas, one or more matrix composition is chosen for antenna port 0 from one deck code book of the code book corresponding to the number of antennas that terminal is supported at most, the multiplexing number of plies of 1 be 1 re-transmission code book or pre-coding matrix collection comprise: from up 2 transmitting antenna 1 layer of code book, choose 1, 2, 3, 4, 5 or 6 pre-coding matrixes composition above-mentioned for antenna port 0, the multiplexing number of plies of 1 is re-transmission code book or the pre-coding matrix collection of 1, wherein, in up 2 transmitting antenna 1 layer of code book, optional pre-coding matrix comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is the pre-coding matrix of 5.

Preferably, choose from up 2 transmitting antenna 1 layer of code book 1 pre-coding matrix composition for the multiplexing number of plies of antenna port 0,1 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 2 transmitting antenna 1 layer of code book with one of composition for the code book that retransmits or pre-coding matrix collection;

Preferably, choose from up 2 transmitting antenna 1 layer of code book 2 pre-coding matrixes composition for the multiplexing number of plies of antenna port 0,1 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 2 transmitting antenna 1 layer of code book form the code book for retransmitting or pre-coding matrix collection;

Preferably, choose from up 2 transmitting antenna 1 layer of code book 3 pre-coding matrixes composition for the multiplexing number of plies of antenna port 0,1 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 2 transmitting antenna 1 layer of code book form the code book for retransmitting or pre-coding matrix collection;

Preferably, choose from up 2 transmitting antenna 1 layer of code book 4 pre-coding matrixes composition for the multiplexing number of plies of antenna port 0,1 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 2 transmitting antenna 1 layer of code book form the code book for retransmitting or pre-coding matrix collection.

Below in conjunction with example five, above-mentioned preferred implementation process is described.

Example five

When terminal supports at most 2 transmit antennas, the precoding codebook for terminal retransmission block is the subset of up 2 transmitting antennas 1 layer of code book;

Preferably, for the code book that retransmits or pre-coding matrix collection by pre-coding matrix or or or composition;

Preferably, for the code book that retransmits or pre-coding matrix collection by pre-coding matrix composition;

Preferably, for the code book that retransmits or pre-coding matrix collection by pre-coding matrix composition;

In preferred implementation process, when terminal supports at most 4 transmit antennas, one or more matrix composition is chosen for antenna port 0 from one deck code book of the code book corresponding to the number of antennas that terminal is supported at most, 1, 2, the spatial reuse number of plies of 3 be 1 re-transmission code book or pre-coding matrix collection comprise: from up 4 transmitting antenna 1 layer of code book, choose 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 pre-coding matrixes composition above-mentioned for antenna port 0, 1, 2, the spatial reuse number of plies of 3 is code book or the pre-coding matrix collection of the re-transmission of 1, wherein, in up 4 transmitting antenna 1 layer of code book, optional pre-coding matrix comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is 8, index is 12, index is 13, index is 14, index is the pre-coding matrix of 15.

Preferably, choose from up 4 transmitting antenna 1 layer of code book 1 pre-coding matrix composition for the spatial reuse number of plies of antenna port 0,1,2,3 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 1 layer of code book with one of composition for the code book that retransmits or pre-coding matrix collection;

Preferably, choose from up 4 transmitting antenna 1 layer of code book 2 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 1 layer of code book in 2 compositions for the code book that retransmits or pre-coding matrix collection;

Preferably, choose from up 4 transmitting antenna 1 layer of code book 3 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 1 layer of code book 3 compositions for the code book that retransmits or pre-coding matrix collection;

Preferably, choose from up 4 transmitting antenna 1 layer of code book 4 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be 1 re-transmission code book or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 1 layer of code book 4 compositions for the code book that retransmits or pre-coding matrix collection.

Below in conjunction with example six, above-mentioned preferred implementation process is described.

Example six

When terminal supports at most 4 transmit antennas, the precoding codebook that the spatial reuse number of plies for terminal retransmission block is 1 be the up 4 transmitting antenna spatial reuse numbers of plies for 1 time the subset of code book that uses, or predefined code book;

Preferably, for the code book that retransmits by matrix or or or or or or or or or composition;

Preferably, m is 2, for the code book that retransmits by matrix in any 2 compositions;

Preferably, for the code book that retransmits by matrix in any 3 compositions;

Preferably, for the code book that retransmits by matrix in any 4 compositions;

In preferred implementation process, when terminal supports at most 4 transmit antennas, one or more matrix composition is chosen for antenna port 0 from one deck code book of the code book corresponding to the number of antennas that terminal is supported at most, 1, 2, the spatial reuse number of plies of 3 is that 2 re-transmission code books or pre-coding matrix collection can comprise following process: from up 4 transmitting antenna 2 layers of code book, choose 1, 2, 3, 4, , 5, 6, 7, 8, 9 or 10 pre-coding matrixes composition above-mentioned for antenna port 0, 1, 2, the spatial reuse number of plies of 3 is 2 re-transmission code books or pre-coding matrix collection, wherein, pre-coding matrix in up 4 transmitting antenna 2 layers of code book comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is 8, index is 12, index is 13, index is 14, index is the pre-coding matrix of 15.

Preferably, from up 4 transmitting antenna 2 layers of code book, choosing 1 pre-coding matrix composition for the spatial reuse number of plies of antenna port 0,1,2,3 is that 2 re-transmission code books or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 2 layers of code book one of composition for the code book that retransmits or pre-coding matrix collection;

Preferably, from up 4 transmitting antenna 2 layers of code book, to choose 2 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be that 2 re-transmission code books or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 2 layers of code book in 2 compositions for the code book that retransmits or pre-coding matrix collection;

Preferably, from up 4 transmitting antenna 2 layers of code book, to choose 3 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be that 2 re-transmission code books or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 2 layers of code book 3 compositions for the code book that retransmits or pre-coding matrix collection;

Preferably, from up 4 transmitting antenna 2 layers of code book, to choose 4 pre-coding matrixes composition for the spatial reuse number of plies of antenna port 0,1,2,3 be that 2 re-transmission code books or pre-coding matrix collection may further include following process: by up 4 transmitting antenna 2 layers of code book 4 compositions for the code book that retransmits or pre-coding matrix collection.

Below in conjunction with example seven, above-mentioned preferred implementation process is described.

Example seven

When terminal supports at most 4 transmit antennas, the precoding codebook that the spatial reuse number of plies for terminal retransmission block is 2 be the up 4 transmitting antenna spatial reuse numbers of plies for 2 time the subset of code book that uses, or predefined code book;

Preferably, for the code book that retransmits by matrix or or or or composition;

Preferably, for the code book that retransmits by matrix in 2 matrixes composition;

Preferably, for the code book that retransmits by matrix in 3 matrixes composition;

Preferably, for the code book that retransmits by matrix in 4 matrixes composition;

Fig. 4 is the structured flowchart of the terminal according to the embodiment of the present invention.As shown in Figure 4, comprise according to the terminal of the embodiment of the present invention: precoding module 40 and retransmission module 42.

Precoding module 40, the transmission block that pre-coding matrix or vector for adopting setting treat re-transmission carries out precoding, wherein, pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch or vector and predefined pre-coding matrix or vector, or pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection;

Retransmission module 42, for retransmitting the transmission block after precoding.

By the pre-coding matrix indicated by nearest dispatch or vector, predefined pre-coding matrix or vector are set to the pre-coding matrix for treating retransmission block, or select the pre-coding matrix for treating retransmission block from the code book for retransmitting or pre-coding matrix collection.Above-mentioned terminal, adopts the pre-coding matrix set carry out precoding to needing the transmission block retransmitted and send, can realize effective re-transmission of transmission block under the prerequisite of saving signaling consumption.

Preferably, as shown in Figure 5, above-mentioned terminal can also comprise: first arranges module 44, is set as the pre-coding matrix arranged for the pre-coding matrix indicated by nearest dispatch or vector.

Preferably, as shown in Figure 5, above-mentioned terminal can also comprise: second arranges module 46, pre-coding matrix or vector is chosen to arrange pre-coding matrix for concentrating from the code book for retransmitting or pre-coding matrix, wherein, being made up of one or more matrix for the code book that retransmits or pre-coding matrix collection, when the code book for retransmitting or pre-coding matrix collection are made up of a matrix, fixingly when retransmitting using this pre-coding matrix; When the code book for retransmitting or pre-coding matrix collection are made up of multiple matrix, in repeatedly retransmission processes, recycle multiple pre-coding matrix successively.

It should be noted that the preferred working method that above-mentioned modules be combined with each other specifically see example one to example seven, can repeat no more herein.

In sum, pass through the above embodiment of the present invention, the sending method of the transmission block triggered by physics HARQ indicator channel provided and terminal, by the pre-coding matrix indicated by nearest dispatch or vector, predefined pre-coding matrix or vector are set to the pre-coding matrix for treating retransmission block, or selecting the pre-coding matrix for treating retransmission block from the code book for retransmitting or pre-coding matrix collection, effective re-transmission of transmission block can be realized under the prerequisite of saving signaling consumption.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.

These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (15)

1. a repeating method for the transmission block of physical mixed HARQ HARQ indicator channel triggering, is characterized in that, comprising:

The transmission block that terminal adopts the pre-coding matrix of setting or vector to treat re-transmission carries out precoding, wherein, described pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch or vector and predefined pre-coding matrix or vector, or described pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection, when triggered by physics HARQ indicator channel be less than the transmission block quantity of the nearest transmitting procedure with dispatch until retransmission number of blocks time, concentrate from described code book for retransmitting or pre-coding matrix and choose pre-coding matrix or vector to arrange described pre-coding matrix, wherein, described code book for retransmitting or pre-coding matrix collection are made up of one or more matrix, when the code book for retransmitting or pre-coding matrix collection are made up of a matrix, fixing this pre-coding matrix of use when retransmitting, when precoding codebook is made up of multiple matrix, described multiple pre-coding matrix is recycled successively in repeatedly retransmission processes, wherein, pre-coding matrix indicated by nearest dispatch or vector arrange described pre-coding matrix and comprise one of following:

When triggered by physics HARQ indicator channel when retransmission number of blocks is equal with the transmission block quantity of the nearest transmitting procedure with dispatch, it is identical with the number of plies indicated by nearest dispatch that the re-transmission number of plies is set, and it is identical with the pre-coding matrix indicated by nearest dispatch to arrange described pre-coding matrix;

When triggered by physics HARQ indicator channel be less than the transmission block quantity of the nearest transmitting procedure with dispatch until retransmission number of blocks time, the pre-coding matrix indicated by nearest dispatch or vector arrange current pre-coding matrix for treating retransmission block or vector;

Described terminal retransmits the transmission block after described precoding.

2. method according to claim 1, is characterized in that, arranges current pre-coding matrix or vector for treating retransmission block and comprises:

Choose the pre-coding matrix that comes from described code book for retransmitting or pre-coding matrix collection or vector as described current pre-coding matrix for treating retransmission block or vector.

3. method according to claim 1 and 2, is characterized in that, when described terminal supports at most 2 transmit antennas, arranges described pre-coding matrix and comprises one of following:

The pre-coding matrix used when a pre-coding matrix of specifying in up 2 transmitting antenna 1 layer of code book is set to current re-transmission;

Circulate successively and a pre-coding matrix in all or part of pre-coding matrix of up 2 transmitting antennas 1 layer of code book is retransmitted the pre-coding matrix of use as each time.

4. method according to claim 3, is characterized in that, described pre-coding matrix of specifying is $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right].$

5. method according to claim 3, is characterized in that, the part pre-coding matrix in described up 2 transmitting antenna 1 layer of code book comprises:

$\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ j\end{array}\right],$ And $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -j\end{array}\right].$

6. method according to claim 1 and 2, it is characterized in that, when described terminal support at most 4 transmit antennas and the nearest transmitting procedure with dispatch employ 2 layers of pre-coding matrix carry out precoding time, described pre-coding matrix is set and comprises one of following:

Arranging for the pre-coding matrix retransmitted is the matrix that 4 row 1 arrange, wherein, this matrix contains the kth row nonzero element of the described up 4 transmitting antennas 2 layers of pre-coding matrix used with the transmitting procedure of dispatch recently, k for described in treat the call number 1 or 2 of retransmission block;

From up 4 transmitting antenna 1 layer of code book, select a pre-coding matrix as the pre-coding matrix of described setting, wherein, the pre-coding matrix of described selection and the kth column vector of the described up 4 transmitting antennas 2 layer pre-coding matrix used with the transmitting procedure of dispatch recently have minimum string distance.

7. method according to claim 1 and 2, is characterized in that, when described terminal supports at most 4 transmit antennas and the nearest transmitting procedure with dispatch uses 3 layers of pre-coding matrix to carry out precoding, arranges described pre-coding matrix and comprises:

If described in transmission block to be retransmitted be the 1st transmission block, then arranging and retransmitting the pre-coding matrix used is the matrix that 4 row 1 arrange, wherein, this matrix contains the 1st row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses; Or from up 4 transmitting antenna 1 layer of code book, select a pre-coding matrix as the pre-coding matrix of described setting, wherein, the 1st column vector of the pre-coding matrix of described selection and the nearest transmitting procedure with dispatch 3 layers of pre-coding matrix used has minimum string distance;

If described in transmission block to be retransmitted be the 2nd transmission block, then arranging and retransmitting the pre-coding matrix used is the matrix that 4 row 2 arrange, wherein, this matrix contains the 2nd row and the 3rd row nonzero element of 3 layers of pre-coding matrix that the nearest transmitting procedure with dispatch uses; Or from up 4 transmitting antenna 2 layers of code book, select a pre-coding matrix as the pre-coding matrix of described setting, wherein, the matrix that the 2nd column vector of 3 layers of pre-coding matrix that uses of the pre-coding matrix of described selection and the nearest transmitting procedure with dispatch and the 3rd column vector form has minimum string distance.

8. method according to claim 1 and 2, it is characterized in that, when described terminal supports at most 4 transmit antennas and the nearest transmitting procedure with dispatch uses 4 layers of pre-coding matrix to carry out precoding, described pre-coding matrix is set and comprises one of following:

One of setting in following pre-coding matrix set is the pre-coding matrix of described setting: $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& -1\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& -1\\ 1& 0\\ 0& -1\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 0& 1\\ 1& 0\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 0& -1\\ -1& 0\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& -1\\ 0& 1\\ -1& 0\end{array}\right];$

Circulate successively and a pre-coding matrix in three pre-coding matrixes of described pre-coding matrix set is retransmitted the pre-coding matrix of use as each time.

9. method according to claim 1, it is characterized in that, when terminal supports at most 2 transmit antennas, from up 2 transmitting antenna one deck code book, choose re-transmission code book or pre-coding matrix collection that one or more matrix composition for the multiplexing number of plies of antenna port 0,1 is 1, comprise one of following:

Re-transmission code book or pre-coding matrix collection that 1,2,3,4,5 or the described multiplexing number of plies for antenna port 0,1 of 6 pre-coding matrixes composition are 1 is chosen from up 2 transmitting antenna 1 layer of code book, wherein, the pre-coding matrix in described up 2 transmitting antenna 1 layer of code book comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is the pre-coding matrix of 5.

10. method according to claim 9, it is characterized in that, from up 2 transmitting antenna 1 layer of code book, choose re-transmission code book or pre-coding matrix collection that 1,2,3 or the described multiplexing number of plies for antenna port 0,1 of 4 pre-coding matrixes composition are 1, comprising:

By in up 2 transmitting antenna 1 layer of code book $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ j\end{array}\right],$ With $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -j\end{array}\right]$ One of the described code book for retransmitting of composition or pre-coding matrix collection; Or

By in up 2 transmitting antenna 1 layer of code book $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -1\end{array}\right]$ The described code book for retransmitting of composition or pre-coding matrix collection; Or

By in up 2 transmitting antenna 1 layer of code book $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ j\end{array}\right]$ The described code book for retransmitting of composition or pre-coding matrix collection; Or

By in up 2 transmitting antenna 1 layer of code book $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ 1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -1\end{array}\right],\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ j\end{array}\right],$ $\frac{1}{\sqrt{2}}\left[\begin{array}{c}1\\ -j\end{array}\right]$ The described code book for retransmitting of composition or pre-coding matrix collection.

11. methods according to claim 1, is characterized in that, when terminal supports at most 4 transmit antennas, the spatial reuse number of plies for antenna port 0,1,2,3 is re-transmission code book or the pre-coding matrix collection of 1, comprise one of following:

Re-transmission code book or pre-coding matrix collection that 1,2,3,4,5,6,7,8,9 or the described multiplexing number of plies for antenna port 0,1,2,3 of 10 pre-coding matrixes composition are 1 is chosen from up 4 transmitting antenna 1 layer of code book, wherein, the pre-coding matrix in described up 4 transmitting antenna 1 layer of code book comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is 8, index is 12, index is 13, index is 14, index is the pre-coding matrix of 15.

12. methods according to claim 11, is characterized in that, choose the re-transmission code book being 1 for the multiplexing number of plies of antenna port 0,1,2,3 described in 1,2,3 or 4 pre-coding matrix compositions and comprise from up 4 transmitting antenna 1 layer of code book:

By in up 4 transmitting antenna 1 layer of code book $\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ j\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -j\\ -j\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{c}1\\ j\\ 1\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ 1\\ -j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ -j\\ 1\end{array}\right]$ One of the described code book for retransmitting of composition or pre-coding matrix collection; Or

By in up 4 transmitting antenna 1 layer of code book $\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ j\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -j\\ -j\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{c}1\\ j\\ 1\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ 1\\ -j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ -j\\ 1\end{array}\right]$ In the described code book for retransmitting of 2 compositions or pre-coding matrix collection; Or

By in up 4 transmitting antenna 1 layer of code book $\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ j\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -j\\ -j\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{c}1\\ j\\ 1\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ 1\\ -j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ -j\\ 1\end{array}\right]$ The described code book for retransmitting of 3 compositions or pre-coding matrix collection; Or

By in up 4 transmitting antenna 1 layer of code book $\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ j\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ -j\\ -j\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{c}1\\ j\\ 1\\ j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ 1\\ 1\\ 1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -1\\ 1\\ -1\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ 1\\ -j\end{array}\right],\frac{1}{2}\left[\begin{array}{c}1\\ -j\\ -j\\ 1\end{array}\right]$ The described code book for retransmitting of 4 compositions or pre-coding matrix collection.

13. methods according to claim 1, is characterized in that, when terminal supports at most 4 transmit antennas, the spatial reuse number of plies for antenna port 0,1,2,3 is re-transmission code book or the pre-coding matrix collection of 2, comprise one of following:

Re-transmission code book or pre-coding matrix collection that 1,2,3,4,5,6,7,8,9 or the described multiplexing number of plies for antenna port 0,1,2,3 of 10 pre-coding matrixes composition are 2 is chosen from up 4 transmitting antenna 2 layers of code book, wherein, the pre-coding matrix in described up 4 transmitting antenna 2 layers of code book comprises: index is 0, index is 1, index is 2, index is 3, index is 4, index is 8, index is 12, index is 13, index is 14, index is the pre-coding matrix of 15.

14. methods according to claim 13, it is characterized in that, choose from up 4 transmitting antenna 2 layers of code book 1,2,3 or the described multiplexing number of plies for antenna port 0,1,2,3 of 4 pre-coding matrixes composition be 2 re-transmission code book or pre-coding matrix collection comprise:

By in up 4 transmitting antenna 2 layers of code book $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}0& 1\\ 1& 0\\ 1& 0\\ 0& 1\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right]$ One of the described code book for retransmitting of composition or pre-coding matrix collection; Or

By in up 4 transmitting antenna 2 layers of code book $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}0& 1\\ 1& 0\\ 1& 0\\ 0& 1\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right]$ In the described code book for retransmitting of 2 compositions or pre-coding matrix collection; Or

By in up 4 transmitting antenna 2 layers of code book $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}0& 1\\ 1& 0\\ 1& 0\\ 0& 1\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right]$ The described code book for retransmitting of 3 compositions or pre-coding matrix collection; Or

By in up 4 transmitting antenna 2 layers of code book $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ 1& 0\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 0& 1\\ -1& 0\\ 0& -1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}0& 1\\ 1& 0\\ 1& 0\\ 0& 1\end{array}\right],$ $\frac{1}{2}\left[\begin{array}{cc}1& 0\\ 1& 0\\ 0& 1\\ 0& 1\end{array}\right],\frac{1}{2}\left[\begin{array}{cc}1& 0\\ -1& 0\\ 0& 1\\ 0& -1\end{array}\right]$ The described code book for retransmitting of 4 compositions or pre-coding matrix collection.

15. 1 kinds of terminals, is characterized in that, comprising:

Precoding module, transmission block for adopting the pre-coding matrix of setting to treat re-transmission carries out precoding, wherein, described pre-coding matrix or vector are pre-coding matrix indicated by nearest dispatch or vector and predefined pre-coding matrix or vector, or described pre-coding matrix or vector are selected from code book for retransmitting or pre-coding matrix collection, wherein, the pre-coding matrix indicated by nearest dispatch or vector arrange described pre-coding matrix and comprise one of following:

When triggered by physics HARQ indicator channel when retransmission number of blocks is equal with the transmission block quantity of the nearest transmitting procedure with dispatch, it is identical with the number of plies indicated by nearest dispatch that the re-transmission number of plies is set, and it is identical with the pre-coding matrix indicated by nearest dispatch to arrange described pre-coding matrix;

When triggered by physics HARQ indicator channel be less than the transmission block quantity of the nearest transmitting procedure with dispatch until retransmission number of blocks time, the pre-coding matrix indicated by nearest dispatch or vector arrange current pre-coding matrix for treating retransmission block or vector;

Retransmission module, for retransmitting the transmission block after described precoding;

First arranges module, sets described pre-coding matrix for the pre-coding matrix indicated by nearest dispatch or vector;

Second arranges module, pre-coding matrix or vector is chosen to arrange described pre-coding matrix for concentrating from described code book for retransmitting or pre-coding matrix, wherein, described code book for retransmitting or pre-coding matrix collection are made up of one or more matrix, when described code book for retransmitting or pre-coding matrix collection are made up of a matrix, fixingly when retransmitting use this pre-coding matrix; When described code book for retransmitting or pre-coding matrix collection are made up of multiple matrix, in repeatedly retransmission processes, recycle described multiple pre-coding matrix successively.