CN101043303A - Method and system for mixed retransmission in multi-input multi-output communication system - Google Patents

Method and system for mixed retransmission in multi-input multi-output communication system Download PDF

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CN101043303A
CN101043303A CN 200610064991 CN200610064991A CN101043303A CN 101043303 A CN101043303 A CN 101043303A CN 200610064991 CN200610064991 CN 200610064991 CN 200610064991 A CN200610064991 A CN 200610064991A CN 101043303 A CN101043303 A CN 101043303A
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朱胡飞
卢毅
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The invention discloses a mixing retransmitting method in the multi-input and multi-output communication system, the method uses the receiving end to disturb and eliminate the mistake of decoding, and feed the retransmitting request to the sending end; when the transmitting end receives the retransmitting request, retransmits the data with mistakes and other data effected by the disturbance and elimination of decoding. The invention also discloses a receiver, a transmitter and a multi-input and multi-output communication system.

Description

In multiple-input-multiple-output communication system, mix the method and system that retransmit
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and system that retransmit (HARQ) of in many input and output (MIMO) communication system, mixing.
Background technology
According to information theory, at the transmitting terminal and the receiving terminal of communication system, perhaps these two ends use multi-antenna array can improve transmission bit rate greatly simultaneously.
The wireless communication system with Space-Time framework that uses multi-antenna array simultaneously at transmitting terminal and receiving terminal as shown in Figure 1.This system works is at the Rayleigh scattering environment, and each element of channel matrix can be similar to regards that statistics independently as.In system shown in Figure 1, a data sequence is divided into M incoherent code element subsequence, and each subsequence is by an emission in M the transmitting antenna.M subsequence received by N reception antenna at receiving terminal after the influence of the channel that is H through a channel matrix.S emission signal s 1..., s MPass through M different antenna element a-1 respectively ..., a-M emission, corresponding received signal x 1..., x NRespectively from N different antenna element b-1 ..., b-N receives.In this system, it is 2 that transmission antenna unit is counted M minimum, and reception antenna unit number N minimum be M.Channel matrix H is the matrix of a N * M, and i reception antenna of element representation of the capable j of i row and j transmitting antenna are by the coupling of transmission channel in the matrix.Received signal x 1..., x NProcessed to produce transmitting of recovering in digital signal processor
Figure A20061006499100051
Also shown summation composition c-1 among this figure, c-2 ..., c-N, the unavoidable noise signal w that their representatives comprise 1, w 2..., w N, these noise signals join reception antenna unit b-1 respectively, b-2 ..., in the signal that b-N receives.
Motion 11 (the Proposal 11:Single ﹠amp of document 3GPP TR 25.876 V1.7.1; Multiple CodeWord MIMO with Virtual Antenna mapping (SCW/MCW-VA)) introduced many code words (MCW) communication plan of a kind of MIMO, and " MIMOproposal for MIMO-WCDMA evaluation " has carried out more detailed narration at 3GPP motion R1-050912.In the MCW of MIMO communication plan, have multichannel to transmit, the Turbo encoding scheme of different coding rate is all adopted on each road, and receiving terminal is according to acknowledge(ment) signal, the Turbo of elder generation decodes, and riches all the way penetrates signal, after the decoding, judge according to check digit whether the decoding of this road signal is correct, if correct, then use decoded results, eliminate the influence that transmits that this road has been correctly decoded from received signal, eliminated the received signal after the influence according to described again, Turbo another road of decoding transmits; Like this iteration carry out above-mentioned step, transmit up to all multichannels of decoding.If a certain road transmits not by correct Turbo decoding, then can't from received signal, eliminate the influence that this road transmits, thereby can't decode other each road also not by transmitting that Turbo decodes with Turbo, need data retransmission this moment.
In the MCW of MIMO, an important aspect is how to carry out HARQ to retransmit.Can consider one by 4 transmitting antennas and 4 MCW mimo systems that reception antenna is formed, at TTI=1 constantly, receiving terminal receives that 4 the tunnel will take continuous interference eliminated (SIC) method that signal is decoded successively after transmitting.At first will be to first via data Y 11Decode, if Y 11Decoding error, then receiving terminal will feed back a NACK to transmitting terminal, and the expression decoding error also needs to retransmit.At this moment owing to the 2nd, 3,4 circuit-switched data Y in the SIC method 12, Y 13, Y 14Channel estimating need Y 11Be correctly decoded data, so Y 12, Y 13, Y 14All will wait for, up to Y 11Retransmit and be correctly decoded.The traditional HARQ data repeating method that provides among the motion 11 of 3GPP TR 25.876 V1.7.1 and the 3GPP motion R1-050912 will be only to former Y 11Retransmit, promptly at the TTI=k+1 moment (k is the HARQ retransmit interval) antenna T X1Last transmission Y 11Redundant data Y 11', antenna T X2, T X3, T X4On will transmit new data.Receiving terminal is received Y 11' after with it and Y 11Merge the back decoding,, just can handle Y if decoding is correct 12, handle Y then successively 13, Y 14
Existing HARQ data repeating method will be only to Y 11Retransmit, might cause a kind of situation like this, promptly work as Y 11(and Y 11' merge) be correctly decoded, again to Y 12Mistake, then Y have appearred when channel estimating and decoding 13, Y 14Must wait for Y 12Could decode after re-transmission and decoding are correct, and Y 12Re-transmission Y 12' again will be after k TTI.Even Y 12After 2k TTI, be correctly decoded Y 13The failure of also might decoding causes Y 14Wait for.Very large time delay and memory space will be caused like this, particularly, quality of service will be had a strong impact on for the very strong business of real-time.In addition, when TTI data were constantly retransmitted repeatedly, channel condition may change, if the channel variation will further influence the performance of decoding.
Also on the basis of soft input and output decoding system, the automatic repeat requests of a kind of mixing based on decode reliability (RB-HARQ) scheme has been proposed in the prior art.In soft input and output decoding system, the log-likelihood ratio LLR of decoder computing information bit:
L ( μ k ) = log ( p ( μ k = + 1 | r p ( μ k = - 1 | r )
The bit of r for receiving in the formula.Emulation shows that the sign indicating number position decoding probability of errors with less LLR value is bigger, has less reliability; Sign indicating number position decoding probability of errors with big LLR value is less, has bigger reliability.As shown in Figure 2, the sign indicating number position probability of errors with minimal reliability is 50%, and the sign indicating number position probability of errors with maximum positive degree is near 0.
In the RB-HARQ scheme,, and feed back this L sign indicating number bit position information and give the transmitting terminal request retransmission if the receiving terminal decoding failure will be selected L the sign indicating number position with minimum LLR; Otherwise, send confirmation ACK to receiving terminal.
Though the RB-HARQ scheme based on reliability can make the system transmissions performance be improved, but because when deciphering L the sign indicating number bit position information that need retransmit the LLR minimum when makeing mistakes, and in fact, the gross information content of L sign indicating number bit position information is very big, this also is the major obstacle that the RB-HARQ scheme can run in actual applications, and the RB-HARQ scheme is at single input and output (SISO) system.
Summary of the invention
The invention provides a kind of method and system that retransmit of in multiple-input-multiple-output communication system, mixing, may cause the time delay increase and take the excessive problem of storage resources to solve the automatic re-transmission of existing mixing; Further, the bigger problem of amount of information that needs to transmit data is carried in solution in mixing repeat requests.
The invention provides following technical scheme:
A kind of method that retransmits of mixing in multiple-input-multiple-output communication system comprises the steps:
After receiving terminal carries out the decoding of continuous interference eliminated and mistake occurs the circuit-switched data in the multichannel data, to transmitting terminal feedback repeat requests;
Transmitting terminal is according to a circuit-switched data of described repeat requests re-transmission decoding appearance mistake and in other circuit-switched data of carrying out influenced by this circuit-switched data when continuous interference eliminated is decoded.
According to said method:
For each circuit-switched data that retransmits, the antenna that the transmitting terminal utilization originally sent this each circuit-switched data retransmits, and perhaps, transmitting terminal selects wherein No. one antenna or multichannel antenna to retransmit.
Decoding receiving terminal when wrong occurs and further calculates before the decoding log-likelihood ratio LLR of information bit in this circuit-switched data, determines the data sequence that needs retransmit in this circuit-switched data and is identified in the described repeat requests according to this log-likelihood ratio; Transmitting terminal only retransmits the described data sequence in this circuit-switched data.
This circuit-switched data before the described decoding is divided into a plurality of data blocks, calculates the average LLR value of each data block respectively, and with the data sequence of average LLR value minimal data piece in all data blocks as the needs re-transmission; Perhaps, this circuit-switched data before the described decoding is divided into a plurality of data blocks, calculates the LLR value of each information bit in each data block respectively, and add up the number of the interior described LLR value of each data block less than predetermined value; Then, the data sequence that the pairing data block of maximum number is retransmitted as needs.
Adopt the sliding window of predetermined length and by slide successively this circuit-switched data before the described decoding of predetermined step-length, and calculate the first sign indicating number position and the tail sign indicating number position of the LLR value sum and the record data sequence of data in the sliding window at every turn when sliding, will wherein have data sequence in the sliding window of minimum LLR value sum as the data sequence of needs re-transmission; Perhaps, adopt the sliding window of predetermined length and by slide successively this circuit-switched data before the described decoding of predetermined step-length, calculate the first sign indicating number position and the tail sign indicating number position of the LLR value and the record data sequence of each information bit in the sliding window during each the slip, and add up LLR value in this sliding window less than the number of predetermined value, then, the data sequence that the data in the pairing sliding window of maximum number are retransmitted as needs.
Transmitting terminal retransmits in described other circuit-switched data the data with described data sequence counterpart; Receiving terminal only is identified at the first sign indicating number position of described data sequence and the index of tail sign indicating number position in the described repeat requests; Transmitting terminal is directly chosen data sequence according to described index from known array.
A kind of receiver comprises:
The channel-decoding unit, the data after the deinterleaving that is used to decode;
Authentication unit is connected with described decoding unit, is used to verify decoded data;
The retransmission sequence selected cell is connected with described decoding unit, is used for determining the data sequence that needs retransmit according to the data before the decoding after authentication unit is determined decoding error.
Described retransmission sequence unit comprises:
Memory cell is used to store the preceding data of decoding;
Computing unit is used for the log-likelihood ratio LLR of calculating storaging unit information bit;
Determining unit is used for determining the data sequence that described data needs retransmit according to described log-likelihood ratio LLR.
A kind of transmitter comprises:
The channel interleaving unit is used for the data behind the coding are carried out interleaving treatment;
The code check matching unit is used for extracting the data designated sequence the known array after interweaving after receiving the mixing repeat requests.
A kind of multiple-input-multiple-output communication system has a plurality of antennas, and each antenna comprises the receiver transmitter; It is characterized in that described receiver comprises:
The channel-decoding unit, the data after the deinterleaving that is used to decode;
Authentication unit is connected with described decoding unit, is used to verify decoded data;
The retransmission sequence selected cell is connected with described decoding unit, is used for determining the data sequence that needs retransmit according to the data before the decoding after authentication unit is determined decoding error;
Described transmitter comprises:
The channel interleaving unit is used for the data behind the coding are carried out interleaving treatment;
The code check matching unit is used for extracting the data designated sequence the known array after interweaving after receiving the mixing repeat requests.
Beneficial effect of the present invention is as follows:
The present invention retransmits the data on other roads when retransmitting the circuit-switched data of makeing mistakes of decoding, can control the too much problem of number of retransmissions among the MCW MIMO, make that on average being correctly decoded probability when retransmitting on many antennas improves, and then reduce time delay and reduce taking system's storage resources.
The present invention need to determine the data sequence of re-transmission by the LLR of computing information bit, and only notify transmitting terminal with the first sign indicating number position and the tail sign indicating number position of data sequence, need the data volume of carrying in the repeat requests thereby can reduce significantly, the transmission performance of system is provided.
Description of drawings
Fig. 1 is the schematic diagram of existing mimo system transmission data;
Fig. 2 is the LLR of information bit and the curve synoptic diagram of error rate and reliability relation;
Fig. 3 A is the flow chart that transmits data in the embodiment of the invention;
Fig. 3 B is by 4 transmitting antennas and 4 MCWMIMO systems that reception antenna is formed in the embodiment of the invention;
Fig. 4 is the structural representation of antennamitter in the embodiment of the invention;
Fig. 5 is the structural representation of aerial receiver in the embodiment of the invention.
Embodiment
In multiple-input and multiple-output (MIMO) system, decode and stagger the time a circuit-switched data being carried out continuity interference eliminated (SIC) for fear of receiving terminal, transmitting terminal only transmits this circuit-switched data and causes time delay to increase, in the present invention, transmitting terminal occurs the wrong circuit-switched data except retransmitting decoding, also retransmits other circuit-switched data that influenced by this circuit-switched data when carrying out the SIC decoding simultaneously.
Fig. 3 A has provided and has once transmitted the handling process that mistake appears in data, and Fig. 3 B has provided one by 4 transmitting antennas and 4 MCW mimo systems that reception antenna is formed.Consult Fig. 3 A and Fig. 3 B, at TTI=1 constantly, transmitting terminal is by 4 antenna transmission 4 circuit-switched data; Receiving terminal receives that 4 the tunnel will take continuous interference eliminated (SIC) method that signal is decoded successively after transmitting.At first will be to first via data Y 11Decode, if Y 11Decoding error, then receiving terminal will feed back a NACK to transmitting terminal, and the expression decoding error also needs to retransmit.At this moment owing to the 2nd, 3,4 circuit-switched data Y in the SIC method 12, Y 13, Y 14Channel estimating need Y 11Be correctly decoded data, so Y 12, Y 13, Y 14All will wait for, up to Y 11Retransmit and be correctly decoded.Transmitting terminal will retransmit the redundant data Y of all antennas after receiving repeat requests 11', Y 12', Y 13', Y 14', improve on 4 antennas at the TTI=1 data constantly probability that (TTI=k+1) all is correctly decoded when retransmitting.
Retransmit redundant data Y on each antenna 11', Y 12', Y 13', Y 14' length and take number of antennas, and each data retransmission can be determined as the case may be at total proportion that retransmits in the data.As, transmitting terminal utilizes original transmission data Y respectively 11, Y 12, Y 13, Y 14Antenna carry out data retransmission Y 11', Y 12', Y 13', Y 14', perhaps, transmitting terminal selects wherein No. one antenna or multichannel antenna to carry out data retransmission Y 11', Y 12', Y 13', Y 14'.
More specifically, transmitting terminal retransmits redundant data Y 11', Y 12', Y 13', Y 14' length, receiving redundant data Y by receiving terminal 11', Y 12', Y 13', Y 14' after, still can not be correctly decoded Y 11, Y 12, Y 13, Y 14The loss that will cause is determined.At TTI=1 constantly, receiving terminal receives Y 11, Y 12, Y 13, Y 14, wherein any one can not be correctly decoded the loss L that will cause i(i=1,2,3,4), less than at TTI=k+1 constantly, receiving terminal is receiving redundant data Y 11', Y 12', Y 13', Y 14', can not be correctly decoded Y 11, Y 12, Y 13, Y 14In a corresponding loss L who causes i' (i=1,2,3,4), because at TTI=k+1 constantly, the loss that can not be correctly decoded the time delay that will cause and memory space aspect is bigger.So basic thought is exactly that at TTI=1 constantly, receiving terminal can not be correctly decoded Y 11, Y 12, Y 13, Y 14Probability be respectively P 1, P 2, P 3, P 4, can not be correctly decoded the loss that will cause is respectively L 1, L 2, L 3, L 4, the desired value that can not be correctly decoded the loss that will cause is respectively L 1P 1, L 2P 2, L 3P 3, L 4P 4At TTI=k+1 constantly, receiving terminal receives redundant data Y so 11', Y 12', Y 13', Y 14' after can not be correctly decoded Y 11, Y 12, Y 13, Y 14Probability be reduced to P respectively 1', P 2', P 3', P 4', can not be correctly decoded the loss that will cause and raise respectively and be L 1', L 2', L 3', L 4', then this desired value that can not be correctly decoded the loss that will cause constantly is respectively L 1' P 1', L 2' P 2', L 3' P 3', L 4' P 4'; And the target of design guarantees at TTI=k+1 constantly exactly, can not be correctly decoded the desired value L of the loss that will cause 1' P 1', L 2' P 2', L 3' P 3', L 4' P 4', with constantly, can not be correctly decoded the desired value L of the loss that will cause at TTI=1 1P 1, L 2P 2, L 3P 3, L 4P 4Equate or more approaching, in other words, at TTI=k+1 constantly, can not be correctly decoded the loss that will cause and become big that the probability of the incident generation that then must reduction can not be correctly decoded makes in the desired value of the loss in the TTI=k+1 moment constant.
Same reason is if at TTI=k+1 constantly, receiving terminal receives redundant data Y 11', Y 12', Y 13', Y 14' after, still can not be correctly decoded a certain circuit-switched data, such as Y 13, transmitting terminal will be launched redundant data Y so 13", Y 14", receiving constantly at TTI=2k+1 by receiving terminal, can not be correctly decoded the loss that will cause and increase to L again this moment 3", L 4", the target of design is not being correctly decoded Y 13, Y 14Probability be reduced to P respectively 3", P 4", and the feasible desired value L that can not be correctly decoded the loss that will cause 3" P 3", L 4" P 4" identical or more approaching with the desired value of TTI=1 loss constantly constantly with TTI=k+1.
For TTI=nk+1 (n=1,2 ..., N, wherein N is the number of times of HARQ of the maximum of system regulation) constantly HARQ, all handle according to above method.
In like manner, in first via data Y 11Decoding is correct, and to Y 12During decoding error, then receiving terminal will feed back a NACK to transmitting terminal, and the expression decoding error also needs to retransmit.Transmitting terminal will retransmit redundant data Y on antenna after receiving repeat requests 12', Y 13', Y 14', improve on 3 antennas at the TTI=1 data constantly probability that (TTI=k+1) all is correctly decoded when retransmitting.When having only the 4 road decoding error, then only pass the data in this road.
For the MCW mimo system of other quantity antennas, the processing of its processing mode and 4 antennas in like manner repeats no more.
In order further to improve the reliability of data retransmission, in the present embodiment, if Y 11The decoding failure then will be passed through Y 11LLR before the decoding judges needs to retransmit Y 11One piece of data, and also transmit and data Y on other antennas 11The data of counterpart.
Consult shown in Figure 4ly, the transmitter in the individual antenna comprises that checking data inserts unit 40, chnnel coding unit 41, channel interleaving unit 42, code check matching unit 43, data scrambler unit 44 and modulating unit 45 (other processing units are not shown).Checking data inserts the data that unit 40 is used for generating check data and is inserted into the needs transmission; The 41 pairs of checking datas in chnnel coding unit insert the data of unit 40 outputs and encode; The 42 pairs of data that interweave in channel interleaving unit are carried out interleaving treatment; Code check matching unit 43 is used to select the data sequence of needs transmission, when receiving repeat requests, selects the data sequence that needs HARQ to retransmit from known array; The data of 44 pairs of sign indicating number north, data scrambler unit matching unit 43 outputs are carried out scrambler and are handled; Modulating unit 45 with the data-modulated behind the scrambler to subcarrier.
Consult shown in Figure 5ly, the receiver in the individual antenna comprises: demodulating unit 50, data de-scrambling unit 51, sequence selection and merge cells 52, channel deinterleaving unit 53, channel-decoding unit 54, verification unit 55 and retransmission sequence selected cell 56.Demodulating unit 50 is used for making data from the subcarrier demodulation; Data de-scrambling unit 51 is used for the data that demodulate are carried out scramble process; Sequence selection and merge cells 52 are used for recovering and the merging data sequence; Channel deinterleaving unit 53 is used for that the data sequence is carried out deinterleaving to be handled; Data after the 54 pairs of deinterleavings in channel-decoding unit are decoded; Verification module 55 is used for verifying according to checking data whether decoded data are correct that if decoding is correct, then receiving terminal feeds back repeat requests to transmitting terminal, if decoding error is then notified retransmission sequence selected cell 56; Retransmission sequence selected cell 56 is used to store the data before decoding, and need to determine the data sequence of re-transmission after the decoding appearance is wrong the data before decoding.
Consult shown in Figure 6ly, retransmission sequence selected cell 56 can further comprise: memory cell 560, computing unit 561 and determining unit 562; Wherein, memory cell 560 is used to store the preceding data of decoding; Computing unit 561 is used for the log-likelihood ratio LLR of calculating storaging unit information bit; Determining unit is used for the data sequence that retransmits according to log-likelihood ratio LLR specified data needs.
In order to reduce information transmitted amount in the HARQ repeat requests, after determining to need the data sequence of transmission, only transmit the first sign indicating number position and the tail sign indicating number position of data sequence in the HARQ repeat requests, code check matching unit 43 selects the data rows between this first sign indicating number position and the tail sign indicating number position to retransmit.
With the reception data Y on the antenna 1 11Decoding error is an example, and retransmission sequence selected cell 56 need can determine the data sequence of re-transmission in the following ways:
(1) method of partition
With data Y 11Be divided into some, ask the LLR of each information bit in each piece respectively, obtain the average LLR of each piece then, find out the piece that minimum in an average LLR conduct needs re-transmission at last.
For example, with Y 11Be divided into 4, ask the LLR of each bit before decoding in each piece, ask the LLR of each piece, which piece average LLR minimum in 4 relatively feeds back to the index of the first sign indicating number position of this piece and tail sign indicating number position transmitting terminal together with NACK and requires re-transmission this part data then at last.
(2) sliding window method
Adopting length is the rectangular window of L, and sliding step is 2bit, slides successively from first yard position beginning of data, and the first sign indicating number position and the tail sign indicating number position of the LLR value sum and the interior data of window of data in the window once calculated in every slip, and data to the last enter sliding window.To have the window interior first sign indicating number position of minimum LLR and the index of tail sign indicating number position then and feed back to transmitting terminal together with NACK, transmitting terminal then can select corresponding bit to retransmit according to this index.Each sliding step also can be the bit of 1bit or other quantity, can determine sliding step flexibly according to actual needs.
(3) a less LLR counting method
This method can while and piecemeal method or the combination of sliding window method.The threshold value LLR_Threshold of a given LLR works as Y 11During decoding error, with Y 11Piecemeal, in adding up every or the LLR of each sliding window Nepit less than the number of LLR_Threshold, the first sign indicating number position of piece that number is maximum or window and the index of tail sign indicating number position feed back to transmitting terminal together with NACK, and transmitting terminal then can select corresponding bit to retransmit according to this index.
When transmitting terminal is received the index of NACK and first sign indicating number position that need retransmit and tail sign indicating number position, not only retransmit Y 11Go up corresponding data, and retransmit the data Y on other antennas 12, Y 13, Y 14The data sequence of counterpart.Because, work as Y according to the correlation on the room and time 11A part when a certain period has lower LLR, this period also can have relatively poor channel circumstance, so Y 12, Y 13, Y 14The data that go up in this period transmission also will have very big probability to have lower LLR and performance.Utilize this correlation to select the partial sequence that retransmits, can not only make Y 11After re-transmission, be correctly decoded, can make Y 12, Y 13, Y 14Also be correctly decoded, and can save retransmission cost to a great extent, avoid occurring the existing middle situation about postponing that increases.
Because the frame structure of transmission signals is identical on each antenna, when transmitting on the different antennae when being the symbol of different modulation (constellation mapping) mode, data only need corresponding Y on other antennas 11The character position of transmission retransmits corresponding data and gets final product.
Because that calculate is Y 11LLR before the decoding, can will calculate LLR and determine that the re-transmission partial sequence is placed on demodulation and carries out afterwards, and this just in time corresponding transmitting terminal carries out code check coupling (Rate Matching) unit 43 of HARQ, therefore when the index of first sign indicating number position and tail sign indicating number position passes to transmitting terminal, 43 needs of code check matching unit are directly chosen from known array, do not operated and do not need to encode again and interweave etc., therefore, realization of the present invention is simple.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (13)

1, a kind of method that retransmits of mixing in multiple-input-multiple-output communication system is characterized in that, comprises the steps:
After receiving terminal carries out the decoding of continuous interference eliminated and mistake occurs the circuit-switched data in the multichannel data, to transmitting terminal feedback repeat requests;
After transmitting terminal receives described repeat requests, retransmit other circuit-switched data that decoding a wrong circuit-switched data occurs and influenced by this circuit-switched data when carrying out continuous interference eliminated decoding.
2, the method for claim 1 is characterized in that, for each circuit-switched data that retransmits, the antenna that the transmitting terminal utilization originally sent this each circuit-switched data retransmits, and perhaps, transmitting terminal selects wherein No. one antenna or multichannel antenna to retransmit.
3, the method for claim 1, it is characterized in that, decoding receiving terminal when wrong occurs and calculates before the decoding log-likelihood ratio LLR of information bit in this circuit-switched data, determines the data sequence that needs retransmit in this circuit-switched data and is identified in the described repeat requests according to this log-likelihood ratio; Transmitting terminal only retransmits the described data sequence in this circuit-switched data.
4, method as claimed in claim 3, it is characterized in that, this circuit-switched data before the described decoding is divided into a plurality of data blocks, calculates the average LLR value of each data block respectively, and with the data sequence of average LLR value minimal data piece in all data blocks as the needs re-transmission; Perhaps
This circuit-switched data before the described decoding is divided into a plurality of data blocks, calculates the LLR value of each information bit in each data block respectively, and add up the number of the interior described LLR value of each data block less than predetermined value; Then, the data sequence that the pairing data block of maximum number is retransmitted as needs.
5, method as claimed in claim 3, it is characterized in that, adopt the sliding window of predetermined length and by slide successively this circuit-switched data before the described decoding of predetermined step-length, and calculate the first sign indicating number position and the tail sign indicating number position of the LLR value sum and the record data sequence of data in the sliding window at every turn when sliding, will wherein have data sequence in the sliding window of minimum LLR value sum as the data sequence of needs re-transmission; Perhaps
Adopt the sliding window of predetermined length and by slide successively this circuit-switched data before the described decoding of predetermined step-length, calculate the first sign indicating number and the tail sign indicating number position of the LLR value of each information bit in the sliding window and record data sequence during each the slip, and add up the number of the interior LLR value of this sliding window less than predetermined value; Then, the data sequence that the data in the pairing sliding window of maximum number are retransmitted as needs.
As claim 3,4 or 5 described methods, it is characterized in that 6, transmitting terminal retransmits in described other circuit-switched data the data with described data sequence counterpart.
7, method as claimed in claim 6 is characterized in that, receiving terminal only is identified at the first sign indicating number position of described data sequence and the index of tail sign indicating number position in the described repeat requests.
8, method as claimed in claim 7 is characterized in that, transmitting terminal is directly chosen data sequence according to described index from known array.
9, a kind of receiver is characterized in that, comprising:
The channel-decoding unit, the data after the deinterleaving that is used to decode;
Authentication unit is connected with described decoding unit, is used to verify decoded data;
The retransmission sequence selected cell is connected with described decoding unit, is used for determining the data sequence that needs retransmit according to the data before the decoding after authentication unit is determined decoding error.
10, receiving system as claimed in claim 9 is characterized in that, described retransmission sequence unit comprises:
Memory cell is used to store the preceding data of decoding;
Computing unit is used for the log-likelihood ratio LLR of calculating storaging unit information bit;
Determining unit is used for determining the data sequence that described data needs retransmit according to described log-likelihood ratio LLR.
11, a kind of transmitter is characterized in that, comprising:
The channel interleaving unit is used for the data behind the coding are carried out interleaving treatment;
The code check matching unit is used for extracting the data designated sequence the known array after interweaving after receiving the mixing repeat requests.
12, a kind of multiple-input-multiple-output communication system has a plurality of antennas, and each antenna comprises the receiver transmitter; It is characterized in that described receiver comprises:
The channel-decoding unit, the data after the deinterleaving that is used to decode;
Authentication unit is connected with described decoding unit, is used to verify decoded data;
The retransmission sequence selected cell is connected with described decoding unit, is used for determining the data sequence that needs retransmit according to the data before the decoding after authentication unit is determined decoding error;
Described transmitter comprises:
The channel interleaving unit is used for the data behind the coding are carried out interleaving treatment;
The code check matching unit is used for extracting the data designated sequence the known array after interweaving after receiving the mixing repeat requests.
13, multiple-input and multiple-output communication system as claimed in claim 12 is characterized in that, described retransmission sequence unit comprises:
Memory cell is used to store the preceding data of decoding;
Computing unit is used for the log-likelihood ratio LLR of calculating storaging unit information bit;
Determining unit is used for determining the data sequence that described data needs retransmit according to described log-likelihood ratio LLR.
CN 200610064991 2006-03-20 2006-03-20 Method and system for mixed retransmission in multi-input multi-output communication system Pending CN101043303A (en)

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Cited By (9)

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CN101854230A (en) * 2010-05-10 2010-10-06 武汉大学 Device and method for improving retransmission efficiency of communication system
CN102158446A (en) * 2010-02-11 2011-08-17 中兴通讯股份有限公司 Method and device for decoding physical broadcast channel (PBCH) in time division duplex (TDD) system
CN102379150A (en) * 2009-03-03 2012-03-14 Lg电子株式会社 Method and apparatus for transmitting HARQ ack/nack signal in multi-antenna system
CN103155656A (en) * 2010-10-05 2013-06-12 摩托罗拉移动有限责任公司 Method and apparatus for reliable control of channel performance
CN103188054A (en) * 2011-12-28 2013-07-03 华为技术有限公司 Acquisition method, acquisition device and acquisition system for feedback delay
CN105357271A (en) * 2015-09-30 2016-02-24 华为技术有限公司 Information processing method and corresponding device
CN106899390A (en) * 2015-12-21 2017-06-27 华为技术有限公司 Method, apparatus and system based on HARQ transmission
CN109921884A (en) * 2017-12-13 2019-06-21 华为技术有限公司 The method, apparatus and communication system of data transmit-receive
CN109983723A (en) * 2019-01-23 2019-07-05 香港应用科技研究院有限公司 Method and apparatus for improving the determination of the HARQ-ACK information in wireless communication system

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US9008011B2 (en) 2009-03-03 2015-04-14 Lg Electronics Inc. Method and apparatus for transmitting HARQ ACK/NACK signal in multi-antenna system
CN102379150A (en) * 2009-03-03 2012-03-14 Lg电子株式会社 Method and apparatus for transmitting HARQ ack/nack signal in multi-antenna system
CN102379150B (en) * 2009-03-03 2014-07-09 Lg电子株式会社 Method and apparatus for transmitting HARQ ack/nack signal in multi-antenna system
CN102158446A (en) * 2010-02-11 2011-08-17 中兴通讯股份有限公司 Method and device for decoding physical broadcast channel (PBCH) in time division duplex (TDD) system
US9106463B2 (en) 2010-02-11 2015-08-11 Zte Corporation Method and apparatus for decoding physical broadcast channel in time division duplexing system
CN102158446B (en) * 2010-02-11 2014-03-19 中兴通讯股份有限公司 Method and device for decoding physical broadcast channel (PBCH) in time division duplex (TDD) system
CN101854230B (en) * 2010-05-10 2013-04-24 武汉大学 Device and method for improving retransmission efficiency of communication system
CN101854230A (en) * 2010-05-10 2010-10-06 武汉大学 Device and method for improving retransmission efficiency of communication system
CN103155656A (en) * 2010-10-05 2013-06-12 摩托罗拉移动有限责任公司 Method and apparatus for reliable control of channel performance
CN103188054A (en) * 2011-12-28 2013-07-03 华为技术有限公司 Acquisition method, acquisition device and acquisition system for feedback delay
CN103188054B (en) * 2011-12-28 2016-06-22 华为技术有限公司 The acquisition methods of feedback delay, Apparatus and system
CN105357271A (en) * 2015-09-30 2016-02-24 华为技术有限公司 Information processing method and corresponding device
CN105357271B (en) * 2015-09-30 2019-05-24 华为技术有限公司 A kind of information processing method and corresponding intrument
CN106899390A (en) * 2015-12-21 2017-06-27 华为技术有限公司 Method, apparatus and system based on HARQ transmission
CN106899390B (en) * 2015-12-21 2020-04-28 华为技术有限公司 HARQ transmission-based method, device and system
CN109921884A (en) * 2017-12-13 2019-06-21 华为技术有限公司 The method, apparatus and communication system of data transmit-receive
CN109921884B (en) * 2017-12-13 2022-04-12 华为技术有限公司 Data receiving and transmitting method, device and communication system
CN109983723A (en) * 2019-01-23 2019-07-05 香港应用科技研究院有限公司 Method and apparatus for improving the determination of the HARQ-ACK information in wireless communication system

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