WO2009098981A1 - Émetteur, récepteur, dispositif de station de base, dispositif de station mobile et système de communication sans fil - Google Patents

Émetteur, récepteur, dispositif de station de base, dispositif de station mobile et système de communication sans fil Download PDF

Info

Publication number
WO2009098981A1
WO2009098981A1 PCT/JP2009/051353 JP2009051353W WO2009098981A1 WO 2009098981 A1 WO2009098981 A1 WO 2009098981A1 JP 2009051353 W JP2009051353 W JP 2009051353W WO 2009098981 A1 WO2009098981 A1 WO 2009098981A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission signal
harq
signal sequence
harq transmission
transport block
Prior art date
Application number
PCT/JP2009/051353
Other languages
English (en)
Japanese (ja)
Inventor
Yosuke Akimoto
Shohei Yamada
Seiji Sato
Original Assignee
Sharp Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2009098981A1 publication Critical patent/WO2009098981A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity

Definitions

  • the present invention relates to a technique for retransmitting a signal transmitted using a multiplexing technique by HARQ (Hybrid Automatic Repeat reQuest).
  • HARQ Hybrid Automatic Repeat reQuest
  • 3GPP 3rd Generation Partnership Project
  • W-CDMA Wideband-Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • MIMO Multi-Input / Multi-Output
  • a transmission-side apparatus is provided with a plurality of antennas, and communication data independent from each antenna is transmitted by radio waves called carriers.
  • the receiving side apparatus receives this with a plurality of antennas, and uses a communication propagation path estimation technique or the like to convert a carrier wave including a plurality of different communication data transmitted from the transmitting side apparatus and synthesized in the communication propagation path, By separating and using each communication data, high communication efficiency is realized.
  • Non-Patent Document 2 a technique called HARQ (Hybrid Automatic Repeat reQuest) as described in Non-Patent Document 2 is also attracting attention as a highly efficient communication technique.
  • HARQ Hybrid Automatic Repeat reQuest
  • a transmission signal sequence provided with error correction bits (parity bits) having a sufficient sequence length using a Turbo code or the like is stored in a buffer.
  • the transmitting side apparatus reads the additional error correction information stepwise to the receiving side apparatus and transmits it, so that the error of the communication data including the error already received in the receiving side apparatus can be further corrected. become. Thereby, data communication can be performed efficiently.
  • E-UTRA is considering introducing MIMO communication technology and HARQ.
  • the MIMO communication scheme is applied to the downlink.
  • a plurality of signal sequences can be spatially multiplexed and transmitted.
  • a unit of the spatially multiplexed signal sequence is called a stream, and a stream that can be transmitted between the base station device and the mobile station device.
  • This number is called Rank. Since the rank can be calculated only by the mobile station apparatus that can know the downlink propagation path information, it is fed back from the mobile station apparatus to the base station apparatus, and the base station apparatus determines the number of downlink streams based on this information. Send a signal.
  • HARQ transmission is a unit transmitted for each initial transmission and retransmission generated based on HARQ from a transmission signal sequence (referred to as a transport block) transmitted from a MAC (Medium Access Control) layer to a physical layer. It is called a signal sequence and is transmitted as downlink data.
  • the bit sequence transmitted as the HARQ transmission signal sequence is assigned a number (defined as a redundancy version or RV (Redundancy Version)) for each pattern, and this number is assigned to the downlink control channel immediately before transmission of the downlink data.
  • RV Redundancy Version
  • Such a mechanism in the transmission side apparatus is called rate matching, and a mechanism for synthesizing bit sequences transmitted in stages in the reception side apparatus is called rate dematching.
  • a buffer in E-UTRA, it is considered to use a buffer called a circular buffer in which the end of the buffer and the head are linked. As a result, when the bit sequence is read from the buffer, the bit sequence can be read sequentially from the beginning when the end is reached.
  • One HARQ retransmission signal sequence is spatially multiplexed using one or more streams and transmitted to the receiver. A group of multiplexed signal sequences is called a multiplexed signal group. In the spatial multiplexing system, a group of streams matches this.
  • HARQ can execute multiple processes simultaneously.
  • a plurality of buffers for storing transmission signal sequences are prepared for transmission and reception, and it is possible to transmit other transport blocks that are not related during the retransmission process.
  • a HARQ process is executed for each transport block, a number identifying the process is signaled to the receiving side device, and which transmission sequence is retransmitted by using this number is transmitted to the transmitting side device and the receiving side.
  • This identifier is referred to as a process number, and is notified to the receiving side device through a control channel.
  • a plurality of transport blocks are made to correspond to a plurality of HARQ transmission signal sequences, and this HARQ transmission signal sequence is made to correspond to a multiplexed signal group and spatially multiplexed. You can send and receive. This concept is as shown in FIGS. 33A and 33B.
  • Each of the N transport blocks is transmitted as N HARQ transmission signal sequences corresponding to the above-described HARQ.
  • the receiver performs decoding processing from each HARQ transmission signal sequence to obtain N transport blocks.
  • FIG. 34 and FIG. 35 are diagrams showing an example of the configuration of the transmission side apparatus and the reception side apparatus when the conventional MIMO communication technique and the HARQ communication technique are combined.
  • the transmission side device performs error correction coding in the error correction coding unit 101 for each of a plurality of transport blocks transmitted from the higher layer to the reception side device, and the rate matching unit 102 performs the error correction coding on the reception side device.
  • the encoded output signal of the rate matching unit 102 is defined as “encoded sequence”. These encoded sequences are scrambled (104) and modulated (105), respectively, and transmission layer mapping is performed (106).
  • a sequence of signals to be subjected to processing such as scramble and modulation on a signal corresponding to HARQ each sequence is called a “codeword”, and one codeword is one HARQ transmission.
  • the transmission layer mapping unit 106 generates a plurality of streams by performing serial / parallel conversion or the like according to the configuration of the stream for transmitting the plurality of transmission data from the modulation mapping unit 105 as necessary. Is transmitted to the receiving side device by spatial multiplexing.
  • E-UTRA In the downlink of E-UTRA, it is considered to use MIMO communication systems of ranks 1 to 4 and a maximum of two transport blocks, a maximum of two HARQ transmission signal sequences, and a maximum of two codewords corresponding thereto. Has been. And a rank can change the number of the ranks which can be utilized according to the condition of a propagation path at any time.
  • the transport blocks from rank 1 to rank 4, the HARQ transmission signal sequence generated therefrom, and the correspondence between codewords and streams are as shown in FIGS. 32A to 32D.
  • the receiving side apparatus performs processing such as propagation path estimation, separation of streams multiplexed in space, demodulation processing, and the like on the received signals received through the plurality of antennas, and obtains a plurality of symbol sequences corresponding to each transmission stream.
  • the reception layer inverse mapping unit 201 determines which antenna of the transmitting apparatus the stream is transmitted from, and reproduces a plurality of data series. This data sequence corresponds to the HARQ transmission signal sequence in the transmitter.
  • each HARQ transmission signal sequence is input to the inverse modulation mapping section 202, the descrambling section 203, and the rate dematching section 205.
  • the signal input to the rate dematching unit 205 matches the encoded sequence at the transmitter.
  • error correction decoding (206) is performed to check whether there is an error in the received data for each transport block.
  • the receiving side apparatus transmits an ACK (Positive Acknowledge) for a sequence in which received data has no error, and a NACK (Negative Acknowledge) for a series having an error in the transport block unit, respectively.
  • the transmission side device ends transmission there, and then repeats the above operation for the transport block passed from the upper layer to the reception side device.
  • Send For the transport block in which NACK is transmitted from the receiving side device, according to the instruction of the scheduler unit in the MAC layer, as shown in FIG. 31, the rate matching unit centering on the error correction information data not transmitted in the previous transmission Select and transmit to the receiving side apparatus using the same HARQ transmission signal sequence / stream.
  • the encoded bit pattern of the transport block retransmitted here is identified by the receiving side device using the redundancy version transmitted by the control channel as described above, and the error correction information data transmitted from the transmitting side device is received at the previous reception.
  • the reception side apparatus can remove the reception error of the transport block that has been previously received in error, it transmits an ACK to the transmission side apparatus, and if the reception error still cannot be removed, the transmission side again A NACK is transmitted to the apparatus, and the next error correction information data is requested to the transmission side apparatus.
  • the transmission side device and the reception side device repeat the above operation for a predetermined maximum number of retransmissions until the reception error of each transport block can be eliminated.
  • Non-Patent Document 3 states that no data is sent when there is no transmission of a transport block that uses a multiplexed signal group 1 and a corresponding codeword (this is called NULL). is suggesting. Specifically, if the index indicating the size of the transport block (transport block size, TBS: Transport Block Size) transmitted with the control channel is transmitted as 0 along with the transmission of the downlink data, it is received that NULL is transmitted. The machine processes. This will be described by taking rank 4 transmission in E-UTRA shown in FIG. 32D as an example. As shown in FIG.
  • the HARQ transmission signal sequence 1 corresponding to the first transport block is transmitted, and the HARQ transmission signal sequence 2 corresponding to the second transport block is transmitted using the multiplexed signal group 2 and the codeword corresponding thereto. . If an error occurs only in the second transport block, in the second transmission, nothing is transmitted in the codeword 1 that transmitted the first transport block and the stream corresponding thereto, and the second transport block Only the block is retransmitted as in the first transmission.
  • Non-Patent Document 4 in order to solve the above problem, a new rank form capable of transmitting the same number of bits is defined, and only one transport block in which a reception error has occurred is transmitted. is suggesting. This will be explained by taking the transmission of rank 4 of E-UTRA shown in FIG. 32D as an example.
  • the first transmission uses the multiplexed signal group 1 and the codeword 1 corresponding thereto.
  • HARQ transmission signal sequence 1 corresponding to one transport block is transmitted
  • HARQ transmission signal sequence 2 corresponding to the second transport block is transmitted using multiplexed signal group 2 and codeword 2 corresponding thereto.
  • the HARQ transmission signal sequence corresponding to the second transport block is retransmitted using transmission mapping that can transmit one HARQ transmission signal sequence in two streams.
  • transmission mapping that can transmit one HARQ transmission signal sequence in two streams.
  • Non-Patent Documents 3 and 4 are used in the situation where one transport block is retransmitted and the other transport block is not transmitted as described above. None will be sent in the stream corresponding to the codeword that is not. That is, there is a problem in that the communication efficiency is lowered because the multiplexing that uses the maximum capacity of the communication path is not performed.
  • FIGS. 33A and 33B a stream used for HARQ retransmission of a specific transport block is fixed, and an available and unused stream cannot be effectively used.
  • Non-Patent Document 2 Furthermore, if limited to E-UTRA, in the method of Non-Patent Document 2, there are two representations of the signal transmission scheme corresponding to rank 2, and in order to identify this with the receiver, the transmitter Therefore, it is necessary to transmit information for identification, and it is not preferable that the control information increases in wireless communication with a limited bandwidth.
  • the present invention has been made in view of such circumstances, and by effectively using a stream having no transport block to be transmitted, and enabling flexible retransmission of transport blocks, MIMO communication can be performed. It is an object of the present invention to provide a technique for maximizing the communication efficiency and error rate characteristics of HARQ retransmission at the time of system.
  • the transmitter of the present invention is a transmitter that transmits a HARQ transmission signal sequence that is generated from a transport block that is a signal sequence passed to the physical layer by the MAC layer and matches a transmission unit by HARQ, A plurality of HARQ transmission signal sequences are generated based on the same transport block, and the generated plurality of HARQ transmission signal sequences are transmitted simultaneously.
  • the communication efficiency of HARQ retransmission at the time of MIMO communication is maximized and the coding gain is maximized.
  • communication quality can be improved.
  • the transmitter of the present invention is characterized in that each of the plurality of HARQ transmission signal sequences corresponds to a different redundancy version.
  • each of the plurality of HARQ transmission signal sequences corresponds to a different redundancy version, it is possible to improve HARQ characteristics.
  • the transmitter of the present invention is a transmitter that includes a plurality of antennas, performs spatial multiplexing of a plurality of signal sequences by a MIMO communication method, and retransmits a transport block based on HARQ.
  • the HARQ transmission signal sequence is multiplexed by a MIMO communication method using a selection / distribution unit that generates a larger number of HARQ transmission signal sequences than the number of transport blocks and the plurality of antennas.
  • a transmitter for re-transmission is a transmitter that includes a plurality of antennas, performs spatial multiplexing of a plurality of signal sequences by a MIMO communication method, and retransmits a transport block based on HARQ.
  • the HARQ transmission signal sequence is multiplexed by a MIMO communication method using a selection / distribution unit that generates a larger number of HARQ transmission signal sequences than the number of transport blocks and the plurality of antennas.
  • the selection / distribution unit has failed to receive one of the transmission signal sequences from the destination communication apparatus, and has successfully received the other transmission signal sequences. If there is no new transport block that is different from the sequence to be retransmitted and the HARQ transmission signal sequence that is generated from the transport block that has been failed to be received, the transport that has been successfully received.
  • a feature is that transmission is performed using multiple resources used by the HARQ transmission signal sequence generated from the block.
  • the selection / distribution unit failed to receive any one of the transmission signal sequences from the destination communication apparatus and succeeded in receiving the other transmission signal sequences.
  • the HARQ transmission signal sequence generated from the transport block that has been failed to be received is It is characterized in that transmission is performed using all the multiple resources including the multiple resources used by the HARQ transmission signal sequence corresponding to the port block.
  • the HARQ transmission signal sequence generated from the transport block assumed to have failed to receive includes multiple resources used by the HARQ transmission signal sequence corresponding to the transport block assumed to be successfully received. Since all multiplex resources are used for transmission, retransmission using a stream that cannot be used in the conventional method can be performed. As a result, it is possible to realize efficient retransmission that effectively uses the free physical resources.
  • the receiver of the present invention is a receiver that receives a HARQ transmission signal sequence that is generated from a transport block that is a signal sequence passed to the physical layer by the MAC layer and matches a transmission unit by HARQ.
  • a HARQ transmission signal sequence that is generated from a transport block that is a signal sequence passed to the physical layer by the MAC layer and matches a transmission unit by HARQ.
  • a smaller number of transport blocks than the number of HARQ transmission signal sequences are restored, so that, for example, the communication efficiency of HARQ retransmission during MIMO communication is maximized.
  • the coding gain can be maximized and the communication quality can be improved.
  • the receiver of the present invention includes a plurality of antennas, receives a plurality of HARQ transmission signal sequences spatially multiplexed by the MIMO communication scheme, and receives a HARQ transmission signal sequence retransmitted based on HARQ.
  • a receiver that receives a plurality of HARQ transmission signal sequences retransmitted in a MIMO communication scheme using the plurality of antennas, and a HARQ transmission signal sequence that has already received the received HARQ transmission signal sequence And a switching unit that switches to a processing unit that decodes the same transport block.
  • the HARQ transmission based on the received HARQ transmission signal sequence It is possible to restore fewer transport blocks than the number of signal sequences, to maximize the communication efficiency of HARQ retransmission during MIMO communication, to maximize the coding gain, and to improve the communication quality.
  • the receiver of the present invention includes a plurality of antennas, receives a plurality of HARQ transmission signal sequences spatially multiplexed by the MIMO communication scheme, and receives a HARQ transmission signal sequence retransmitted based on HARQ.
  • the block corresponding to the block is characterized by comprising a switching unit that combines them and switches to a processing unit that decodes the HARQ transmission signal sequence that has already been received and that has the same transport block.
  • the switching unit determines a transmission signal sequence corresponding to each HARQ transmission signal sequence based on a transmission bit pattern specified by a transmission source communication device. It is said.
  • the transmission signal sequence corresponding to each HARQ transmission signal sequence is determined based on the transmission bit pattern specified by the transmission source communication apparatus. For example, when the transmission signal sequence cannot be identified by the process number Also, it is possible to identify which transmission signal sequence is the retransmitted data. As a result, extra control bits for this identification can be reduced.
  • the switching unit determines a transmission signal sequence to which each HARQ transmission signal sequence corresponds based on the size of the transmission signal sequence designated by the transmission source communication apparatus. It is characterized by that.
  • the transmission signal sequence corresponding to each HARQ transmission signal sequence is determined based on the size of the transmission signal sequence specified by the transmission source communication apparatus. For example, the transmission signal sequence is identified by the process number. Even if it is not possible, it is possible to identify which transmission signal sequence is the retransmitted data. As a result, extra control bits for this identification can be reduced.
  • the receiver of the present invention is characterized in that ACK / NACK corresponding to the number of transmission signal sequences transmitted from the transmission source communication device is returned.
  • the base station apparatus of the present invention is characterized by including any of the transmitters described above.
  • this base station apparatus since HARQ transmission signal sequences corresponding to HARQ more than the number of transmission signal sequences are generated, for example, the communication efficiency of HARQ retransmission at the time of MIMO communication is maximized and encoded. Communication quality can be improved by maximizing the gain.
  • the mobile station apparatus of the present invention is characterized by including any of the receivers described above.
  • the transmission signal sequences processed in a smaller number of higher layers than the number of the HARQ transmission signal sequences are restored.
  • the communication quality can be improved by maximizing the communication gain of HARQ retransmission at the time of MIMO communication and maximizing the coding gain.
  • the radio communication system of the present invention is characterized by comprising the above base station apparatus and the above mobile station apparatus.
  • the communication efficiency of HARQ retransmission at the time of MIMO communication is maximized and encoded. Communication quality can be improved by maximizing the gain.
  • the communication quality can be improved by maximizing the coding gain by utilizing the communication efficiency of HARQ retransmission at the time of MIMO communication to the maximum.
  • the transmitter generates a plurality of HARQ transmission signal sequences from one transport block, and multiplexes and transmits the generated plurality of HARQ transmission signal sequences.
  • the receiver recovers one transport block from a plurality of HARQ transmission signal sequences.
  • the transport block to be retransmitted is efficiently retransmitted using an empty HARQ transmission signal sequence / stream.
  • the process of associating the HARQ transmission signal sequence with a plurality of multiplexed signal groups is logically supported, and includes processing performed on each signal sequence such as scrambling in the process. It is also included in the scope of the present invention that it is not included.
  • a specific operation of a transmitter that associates one transport block with a plurality of HARQ transmission signal sequences and a specific operation of a receiver that associates a plurality of HARQ transmission signal sequences with one transport block An example will be described.
  • FIG. 2 is a block diagram illustrating a configuration example of a transmitter included in the base station apparatus according to the present embodiment
  • FIG. 3 is a block diagram illustrating a configuration example of a receiver included in the mobile station apparatus according to the present embodiment.
  • the transmitter 10 includes an encoding unit 101, a rate matching unit 102, a selection / distribution unit 103, a scramble unit 104, a modulation mapping unit 105, a transmission layer mapping unit 106, and a scheduler unit 107. Yes. Also, as shown in FIG.
  • the receiver 20 includes a reception layer inverse mapping unit 201, an inverse modulation mapping unit 202, a descrambling unit 203, a switching unit 204, a rate dematching unit 205, an error correction decoding unit 206, a control A unit 207 is provided.
  • transmission processing at the base station device and reception processing at the mobile station device will be described taking transmission signals from the base station device to the mobile station device as an example.
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is performed by the selection / distribution unit 103, and the HARQ transmission signal sequence described above is scrambled by 104. It corresponds to the signal after the signal input to.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the transmitter 10 is provided with N transport blocks from the upper layer.
  • the encoding unit 101 receives this as an input, adds a parity bit for error correction and error detection, and outputs the result.
  • the rate matching unit 102 receives this as input, selects and aggregates bits according to the transmission band, and outputs an encoded sequence. Retransmission control using HARQ is performed for each transport block. Also, control information necessary for this is notified to the receiving side using another control information transmission channel.
  • the serially connected encoding unit 101 and rate matching unit 102 are physically or logically provided in parallel.
  • the selection / distribution unit 103 receives the output signals from the N rate matching units 102 according to the control signal of the scheduler unit 107 controlled by the MAC layer, and selects the output signals to the N output terminals. Sort and output.
  • the selection / distribution unit 103 outputs N HARQ transmission signal sequences, but an output from one rate matching unit 102 may correspond to zero or a plurality of HARQ transmission signal sequences.
  • the scrambler 104 receives one output signal of the selection / distribution unit 103, that is, the HARQ transmission signal sequence, scrambles it, and outputs it to the modulation mapping unit 105.
  • the scramble process is realized by taking an exclusive OR with a predetermined sequence.
  • Modulation mapping section 105 performs processing corresponding to the modulation method such as symbolization and complex number expression on the input bit string from scramble section 104, and outputs this as a symbol string.
  • the scrambler 104 and the modulation mapping unit 105 connected in series are physically or logically provided in parallel with the selection / distribution unit 103.
  • the transmission layer mapping unit 106 converts the N input signal sequences from the modulation mapping unit 105 into the number of streams that can be communicated by MIMO (M is the number of streams) and outputs the number of streams.
  • the scheduler unit 107 is configured to include downlink scheduling, uplink scheduling, control data creation, and control data reception functions. Further, the scheduling information is included in the control information and notified to the receiver. The received user data and control data are processed or output to a higher layer.
  • downlink scheduling user data is transmitted to each downlink channel from channel state information notified from the mobile station apparatus, ACK / NACK information of downlink data, data information of each user notified from higher layers, and the like. And scheduling for mapping control data.
  • uplink scheduling scheduling for mapping user data to each uplink channel is performed based on the uplink channel estimation result and the resource allocation request from the mobile station.
  • an ACK / NACK signal is created as control data for correctness of uplink received data.
  • uplink and downlink scheduling information is created as control data.
  • the scheduling unit instructs the encoding unit and the rate matching unit to perform the number of HARQ retransmission signal sequences and control after encoding.
  • the receiver 20 receives a number (M) of symbol series signals corresponding to the number of streams received and demodulated by the MIMO scheme.
  • reception layer inverse mapping section 201 processing reverse to that of transmission layer mapping section 106 is performed, processing for returning the input stream to the HARQ transmission signal sequence is performed, and N HARQ transmission signals corresponding to the transmitter are performed.
  • a series is output.
  • the inverse modulation mapping unit 202 receives one HARQ transmission signal sequence output from the reception layer inverse mapping unit 201, demodulates symbols in accordance with the processing of the modulation mapping unit 105, and outputs a bit sequence.
  • the descrambling unit 203 performs processing reverse to that of the scrambler 104 and outputs this bit string.
  • the inverse modulation mapping unit 202 and the descrambling unit 203 connected in series are physically or logically provided in parallel with the reception layer inverse mapping unit 201.
  • the outputs of the N descrambling units 203 are input to the switching unit 204, and are distributed and output for each HARQ processing unit, that is, for each corresponding transport block, under the control of the control unit 207.
  • the operation of the control unit 207 is determined based on information indicating which transport block corresponds to the HARQ transmission signal sequence transmitted by the downlink control channel. This distribution is performed based on a control signal sent simultaneously with the downlink signal.
  • this output signal is an encoded sequence corresponding to the transmitter. When encoded sequences corresponding to the same transport block are provided from the descrambling unit 203, these are collectively output as one signal.
  • the output of the switching unit 204 is input to the rate dematching unit 205, and the transmitted signals including retransmission are combined and output to the error correction decoding unit 206.
  • the error correction decoding unit 206 performs error correction / error detection processing, removes the parity bits, and outputs a signal sequence corresponding to the transmitted transport block.
  • FIG. 4 shows the number of transmission signal sequences (501), the signal flow (502) corresponding to the first HARQ transmission signal sequence, and the second HARQ transmission signal in communication between the base station apparatus and mobile station apparatus in this embodiment.
  • Signal flow (503) corresponding to the sequence, specific sequence chart (504), and specific signal flows of the base station apparatus and mobile station apparatus in each subframe (S551a, S552a, S553a, S554a, S555a) )It is shown.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and information (rank) of the number of streams applied to the downlink signal is transmitted from the mobile station apparatus to the base station apparatus. To give feedback.
  • rank 4 is transmitted (S551a).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and corresponds to two transport blocks using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552a).
  • information identifying the signal sequence (process number) and selection pattern information (redundancy version, RV) of the transmission signal bit sequence selected by the rate matching unit are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 1 and 0, respectively, and the process number and RV in the encoded sequence 2 are 2 and 0, respectively.
  • the selection / distribution unit 103 operates to associate the encoded sequence 1 with the HARQ transmission signal sequence 1 and associate the encoded sequence 2 with the HARQ transmission signal sequence 2.
  • the transmission layer mapping unit 106 creates four streams from two HARQ transmission signal sequences by the serial / parallel (S / P) conversion unit 601 from the HARQ transmission signal sequences modulated by the modulation mapping unit 105.
  • the reception layer inverse mapping unit 201 corresponds to two HARQ transmission signal sequences from four streams by a parallel / serial (P / S) conversion unit 602.
  • switching section 204 Based on the control signal from control section 207, switching section 204 associates HARQ transmission signal sequence 1 with encoded sequence 1 and HARQ transmission signal sequence 2 with encoded sequence 2, and outputs them to rate dematching section 205. To do.
  • the control unit 207 determines a corresponding distribution method based on the process number notified by the control channel.
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted according to the presence or absence of the error (S553a).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the buffer in the base station apparatus is already empty, there is no transport block transferred from the upper layer, and only the sequence for which transmission failed may be retransmitted.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and uses four streams using two HARQ transmission signal sequences to download one stream block corresponding to one transport block.
  • Link data is transmitted and received by the mobile station apparatus (S554a).
  • the process number and the redundancy version are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 2, 0, respectively, and the process number and RV in the encoded sequence 2 are 2, 0, respectively. That is, the HARQ transmission signal sequences 1 and 2 indicate that the sequences transmitted in the HARQ transmission signal sequence 2 in # Subframe2 are retransmitted in parallel.
  • FIG. 7 shows an example of the operation of the transmitter at this time
  • FIG. 8 shows an example of the operation of the receiver.
  • selection / distribution section 103 associates encoded sequence 2 with HARQ transmission signal sequence 1 and HARQ transmission signal sequence 2, and does not associate encoded sequence 1 with each HARQ transmission signal sequence.
  • the switching unit 204 determines a corresponding distribution method from the process number notified by the control channel, associates the HARQ transmission signal sequence 1 and the HARQ transmission signal sequence 2 with the encoded sequence 2, and outputs these signals. Is output to the rate dematching unit 205.
  • the selection / distribution unit 103 is provided in the preceding stage of the scrambler 104. However, this can be provided in the preceding stage of the modulation mapping unit 105. A configuration including the operation of the allocating unit 103 may be taken. The position where the switching unit 204 is provided in the receiver is also changed according to the position of the selection / distribution unit 103 of the transmitter.
  • FIG. 9 is a block diagram illustrating a configuration example of a transmitter included in the base station apparatus according to the present embodiment
  • FIG. 10 is a block diagram illustrating a configuration example of a receiver included in the mobile station apparatus according to the present embodiment.
  • FIG. The difference between the transmitter illustrated in FIG. 2 and the receiver illustrated in FIG. 3 is a rate matching unit 102, a selection / distribution unit 103, a switching unit 204, and a rate dematching unit 205.
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is performed by the selection / distribution unit 103, and the HARQ transmission signal sequence described above is scrambled by 104. It corresponds to the subsequent output.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the rate matching unit 102 in the transmitter shown in FIG. 9 receives information bits to which parity bits for error correction and error detection are added.
  • selection and aggregation of bits according to the transmission band are performed and output, and the output bit sequence corresponds to the supported redundancy version.
  • four redundancy versions (0, 1, 2, and 3) correspond, and in the above bit selection and aggregation, four different sequences are created for each output sequence and are output.
  • the redundancy version for identifying this bit sequence is notified to the reception side using another control information transmission channel together with other information necessary for decoding.
  • the output signals (total L) of the N rate matching units 102 are input to the selection / distribution unit 103, and the selection / distribution unit 103 selects one of the input signals to be transmitted under the control of the scheduler unit 107, Sort to N output terminals.
  • the switching unit 204 in the receiver 91 shown in FIG. 10 receives the HARQ transmission signal sequence that is the output signal of the N descrambling units 203 as an input, and distributes each HARQ processing unit, that is, for each corresponding transport block. To the rate dematching unit 205. For this reason, a plurality of codewords having the same or different RV may be simultaneously input to one rate dematching unit 205, and these are combined and output to the error correction decoding unit 206.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and feeds back information (rank) of the number of streams applied to the downlink signal from the mobile station apparatus to the base station apparatus.
  • rank 4 is transmitted (S551b).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and corresponds to two transport blocks using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552b).
  • the process number and the redundancy version are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 1 and 0, respectively, and the process number and RV in the encoded sequence 2 are 2 and 0, respectively.
  • FIG. 12 shows a detailed operation example of the transmitter at this time
  • FIG. 13 shows an operation example of the receiver.
  • 14A and 14B are diagrams illustrating a circular buffer 1001 that holds transmission data sequences provided in the rate matching unit 102 and a state in which data of redundancy version 0 is read from the buffer.
  • the rate matching unit 102 holds the signal sequence with the parity bit added in the circular buffer 1001, and changes the information amount that can be transmitted on the physical channel from the start position according to the redundancy version. Read the corresponding number of bits.
  • the rate matching unit 102 corresponds to four redundancy versions, and performs four outputs corresponding to each.
  • the selection / distribution unit 103 receives a total of eight signals output from the two rate matching units 102.
  • RV0 signal in encoded sequence 1 is made to correspond to HARQ transmission signal sequence 1
  • RV0 signal in encoded sequence 2 is made to correspond to HARQ transmission signal sequence 2.
  • the transmission layer mapping unit uses the serial / parallel (S / P) conversion unit 601 to create four streams from the two HARQ transmission signal sequences from the HARQ transmission signal sequence modulated by the modulation mapping unit 105.
  • the reception layer inverse mapping unit 201 causes the parallel / serial (P / S) conversion unit 602 to associate four streams with two HARQ transmission signal sequences.
  • switching section 204 Based on the control signal from control section 207, switching section 204 associates HARQ transmission signal sequence 1 with RV0 of encoded sequence 1 and HARQ transmission signal sequence 2 with RV0 of encoded sequence 2, and performs rate dematching.
  • the data is output to the unit 205.
  • the control unit 207 determines a corresponding distribution method from the process number notified by the control channel.
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted according to the presence or absence of the error (S553b).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the buffer in the base station apparatus is already empty, there is no transport block transferred from the upper layer, and only the sequence for which transmission failed may be retransmitted.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and uses two HARQ transmission signal sequences and four streams to correspond to one transport block.
  • the downlink data is transmitted and received by the mobile station device (S554b).
  • the process number and redundancy version information are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 2 and 1, respectively, and the process number and RV in the encoded sequence 2 are 2 and 2, respectively. That is, the HARQ transmission signal sequences 1 and 2 indicate that transport blocks corresponding to the encoded sequence 2 transmitted in #Subframe 2 are retransmitted in parallel.
  • FIG. 15 shows a detailed operation example of the transmitter at this time
  • FIG. 16 shows an operation example of the receiver.
  • FIGS. 17A and 17B are diagrams illustrating a circular buffer 1001 that holds transmission data series provided in the rate matching unit 102 and a state in which data of redundancy version 0 is read from the buffer.
  • the buffer is empty. For this reason, all the extracted data is empty.
  • the second rate matching unit 102 holds the signal sequence to which the parity bit is added in the circular buffer 1001, and reads data according to the number of bits that can be transmitted on the physical channel from the start position corresponding to the redundancy version.
  • the rate matching unit 102 corresponds to four redundancy versions, and performs four outputs corresponding to each.
  • the selection / distribution unit 103 receives a total of eight signals output from the two rate matching units 102 as inputs.
  • the RV1 signal in the encoded sequence 2 is made to correspond to the HARQ transmission signal sequence 1
  • the RV2 signal in the encoded sequence 2 is made to correspond to the HARQ transmission signal sequence 2.
  • the receiver 91 determines which transport block is transmitted based on the process number transmitted on the control channel.
  • the HARQ transmission signal sequences 1 and 2 both receive the signal having the process number 2, it can be determined that these are one transport block.
  • HARQ transmission signal sequence 1 is associated with RV 1 of encoded sequence 2
  • HARQ transmission signal sequence 2 is associated with RV 2 of encoded sequence 2, and output to rate dematching section 205.
  • the second embodiment when retransmission occurs in a situation where there is no transport block to be newly transmitted, retransmission using a stream that cannot be used in the conventional method can be performed. It is possible to realize an efficient retransmission that effectively uses the free physical resources. Furthermore, in the present embodiment, since different redundancy versions of data can be transmitted in different streams, it is possible to realize efficient retransmission with higher coding gain.
  • This wireless communication system includes a base station device and a mobile station device.
  • the difference from the second embodiment is that the number of streams in which two codes can be used is different, the first HARQ transmission signal sequence can be transmitted using one stream, and the second HARQ transmission signal sequence Is assumed to be rank 3 communication capable of transmission using two streams.
  • the transmitter in this embodiment is the same as the transmitter shown in FIG. 9 in the second embodiment, and the receiver in this embodiment is the same as the receiver shown in FIG. 10 in the second embodiment. It is the same.
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is performed by the selection / distribution unit 103, and the HARQ transmission signal sequence described above is scrambled by 104. It corresponds to the subsequent output.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the HARQ retransmission process performed using the transmitter shown in FIG. 9 and the receiver shown in FIG. 10 will be described using the sequence chart of FIG.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and feeds back information (rank) of the number of streams applied to the downlink signal from the mobile station apparatus to the base station apparatus.
  • rank 3 is transmitted (S551c).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and corresponds to two transport blocks using three streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552c).
  • the process number and the redundancy version are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 1 and 0, respectively, and the process number and RV in the encoded sequence 2 are 2 and 0, respectively.
  • FIG. 19 shows a detailed operation example of the transmitter at this time
  • FIG. 20 shows an operation example of the receiver.
  • the rate matching unit 102 corresponds to four redundancy versions, and performs four outputs corresponding to each.
  • the selection / distribution unit 103 receives a total of eight signals output from the two rate matching units 102.
  • RV0 signal in coded sequence 1 is made to correspond to HARQ transmission signal sequence 1
  • RV0 signal in coded sequence 2 is made to correspond to HARQ transmission signal sequence 2.
  • the transmission layer mapping unit creates only three signals corresponding to the HARQ transmission signal sequence 2 by the serial / parallel (S / P) conversion unit 601, and creates three streams. To do.
  • the reception layer inverse mapping unit 201 causes the parallel / serial (P / S) conversion unit 602 to associate the three streams with the two HARQ transmission signal sequences.
  • Switching section 204 determines the corresponding allocation method from the process number notified by the control channel, and converts HARQ transmission signal sequence 1 to RV0 of encoded sequence 1 and HARQ transmission signal sequence 2 to RV0 of encoded sequence 2. Corresponding to each of them, it is output to the rate dematching unit 205.
  • FIG. 18 is a sequence chart showing the HARQ retransmission process.
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted according to the presence or absence of the error (S553c).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the buffer in the base station apparatus is already empty, there is no transport block transferred from the upper layer, and only the sequence for which transmission failed may be retransmitted.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and uses three streams using two HARQ transmission signal sequences to correspond to one transport block.
  • Data is transmitted and received by the mobile station device (S554c).
  • information for identifying a signal sequence (process number) and redundancy version information are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 2 and 1, respectively, and the process number and RV in the encoded sequence 2 are 2 and 2, respectively. That is, in the encoded sequences 1 and 2, the transport block corresponding to the encoded sequence 2 transmitted in #Subframe 2 is retransmitted in parallel.
  • FIG. 21 shows a detailed operation example of the transmitter at this time
  • FIG. 22 shows an operation example of the receiver.
  • FIG. 23A and FIG. 23B are diagrams showing a circular buffer 1001 that holds a transmission data sequence provided in the rate matching unit 102 and a state in which redundancy version 0 data is read from the buffer.
  • the second rate matching unit 102 holds the signal sequence to which the parity bit is added in the circular buffer 1001, and controls the scheduler unit 107 according to the number of bits that can be transmitted from the start position according to the redundancy version. Read the data.
  • the rate matching unit 102 is compatible with four redundancy versions, and performs four outputs corresponding to each.
  • the selection / distribution unit 103 receives a total of eight signals output from the two rate matching units 102.
  • the RV1 signal in the encoded sequence 2 is made to correspond to the HARQ transmission signal sequence 1
  • the RV2 signal in the encoded sequence 2 is made to correspond to the HARQ transmission signal sequence 2.
  • the HARQ transmission signal sequence 1 has half the number of streams that can be used compared to the HARQ transmission signal sequence 2, the number of bits that can be transmitted is reduced by half. That is, here, only the first half of the sequence output from rate matching section 102 is used as HARQ transmission signal sequence 1.
  • switching unit 204 associates HARQ transmission signal sequence 1 with RV1 of encoded sequence 2 and HARQ transmission signal sequence 2 with RV2 of encoded sequence 2 based on the control signal of control unit 207, and Output to the dematching unit 205.
  • the control unit 207 determines a corresponding distribution method from the process number notified by the control channel.
  • #Subframe 5 decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in #Subframe 4, and ACK or NACK is transmitted according to the presence or absence of the error (S555c).
  • S555c the error since no error has occurred for one transmission signal sequence, only one ACK / NACK transmission is required.
  • the mobile station apparatus transmits ACK to the base station apparatus.
  • the third embodiment when retransmission occurs in a state where there is no transport block to be newly transmitted, it is possible to perform retransmission using a stream that cannot be used in the conventional method. It is possible to realize efficient retransmission that effectively utilizes the available resources. Furthermore, in this embodiment, it is possible to transmit different redundancy versions of data in different streams, and furthermore, encoding by enabling retransmission when the number of transmittable bits is reduced by changing the HARQ transmission signal sequence Efficient retransmission with high gain can be realized.
  • This wireless communication system includes a base station device and a mobile station device.
  • TBS Transport Block Size
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is performed by the selection / distribution unit 103, and the HARQ transmission signal sequence described above is scrambled by 104. It corresponds to the subsequent output.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the configurations of the transmitter and the receiver for implementing this are the same as those in the second embodiment, and are shown in FIGS. 9 and 10, respectively.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and information (rank) of the number of streams applied to the downlink signal is transmitted from the mobile station apparatus to the base station apparatus. To give feedback.
  • rank 4 is transmitted (S551d).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and corresponds to two transport blocks using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552d).
  • the process number, redundancy version, and transport block size are transmitted simultaneously on the downlink control channel.
  • the process number and RV and TBS in the HARQ transmission signal sequence 1 are 1, 0 and 100, respectively, and the process number and RV in the HARQ transmission signal sequence 2 are 2, 0 and 100.
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted according to the presence or absence of the error (S553d).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the buffer in the base station apparatus is already empty, there is no transport block transferred from the upper layer, and only the sequence for which transmission failed may be retransmitted.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and uses four streams using two HARQ transmission signal sequences to download one stream block corresponding to one transport block.
  • the link data is transmitted and received by the mobile station apparatus (S554d).
  • the process number, redundancy version, and transport block size information are simultaneously transmitted on the downlink control channel.
  • the process number and RV and TBS in the HARQ transmission signal sequence 1 are 2, 1, and 0, respectively, and the process number and RV in the HARQ transmission signal sequence 2 are 2, 2, and 100, respectively.
  • switching section 204 associates HARQ transmission signal sequence 1 with RV 1 of encoded sequence 2 and HARQ transmission signal sequence 2 with RV 2 of encoded sequence 2 based on the control signal of control section 207, respectively.
  • the control unit 207 determines a corresponding distribution method based on the transport block size notified by the control channel.
  • the fourth embodiment when retransmission occurs in a situation where there is no transport block to be newly transmitted, retransmission using a stream that cannot be used in the conventional method can be performed. It is possible to realize an efficient retransmission that effectively uses the free physical resources. Further, in this embodiment, even when the transport block cannot be identified by the process number, it is possible to identify which transport block is the retransmitted data by looking at the transport block size. Extra control bits can be reduced.
  • This wireless communication system includes a base station device and a mobile station device.
  • the difference from the first embodiment is that the redundancy version notified from the transmission side is used for the information for identifying the transport block in the receiver.
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is performed by the selection / distribution unit 103, and the HARQ transmission signal sequence described above is scrambled. This corresponds to the output after the unit 104.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the configurations of the transmitter and the receiver for implementing this are the same as those in the second embodiment, and are shown in FIGS. 9 and 10, respectively.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and obtains information on the number of streams (rank) applied to the downlink signal from the mobile station apparatus to the base station. Feedback to the device.
  • rank 4 is transmitted (S551e).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and supports two transport blocks using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552e).
  • the process number and the redundancy version are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the HARQ transmission signal sequence 1 are 2 and 1, respectively, and the process number and RV in the HARQ transmission signal sequence 2 are 2 and 1, respectively.
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted according to the presence or absence of the error (S553e).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the buffer in the base station apparatus is already empty, there is no transport block transferred from the upper layer, and only the sequence for which transmission failed may be retransmitted.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and corresponds to one transport block using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S554e).
  • the process number and redundancy version information are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the HARQ transmission signal sequence 1 are 2, 0, respectively, and the process number and RV in the HARQ transmission signal sequence 2 are 2, 2 respectively.
  • the redundancy version of the HARQ transmission signal sequence 1 is determined by a rule determined in advance from the redundancy version of the HARQ transmission signal sequence 2.
  • RV 2 which is the same as that of the HARQ transmission signal sequence 2 is used. That is, this represents that the transport block corresponding to the encoded sequence 2 transmitted in # Subframe2 is retransmitted in parallel.
  • the switching unit 204 associates the HARQ transmission signal sequence 1 with the RV2 of the encoded sequence 2 and the HARQ transmission signal sequence 2 with the RV2 of the encoded sequence 2 based on the control signal of the control unit 207, respectively.
  • the control unit 207 determines a corresponding distribution method based on the redundancy version notified by the control channel.
  • the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe4 is subjected to decoding processing, and ACK or NACK is transmitted depending on the presence or absence of the error (S555e).
  • S555e the error since no error has occurred for one transmission signal sequence, only one ACK / NACK transmission is required.
  • the mobile station apparatus transmits ACK to the base station apparatus.
  • the fifth embodiment when retransmission occurs in a situation where there is no transport block to be newly transmitted, it is possible to perform retransmission using a stream that cannot be used in the conventional method. It is possible to realize an efficient retransmission that effectively uses the free physical resources. Further, in this embodiment, even when the transport block cannot be identified by the process number, it is possible to identify which transport block is the retransmitted data by looking at the redundancy version. Extra control bits can be reduced.
  • FIG. 26 is a block diagram illustrating a configuration example of a transmitter included in the base station apparatus according to the present embodiment
  • FIG. 27 is a block diagram illustrating a configuration example of a receiver included in the mobile station apparatus according to the present embodiment. It is.
  • the difference between the transmitter shown in FIG. 26 and the transmitter shown in FIG. 9 is that the transport block transmitted in each stream is controlled in the MAC layer without using the selection / distribution unit 103 in FIG. It is to be.
  • the processing of the transmitter that generates a plurality of HARQ transmission signal sequences corresponding to one transport block is already prepared at the stage of arranging the transport block, and after the output of the rate matching unit 102 Thus, a plurality of HARQ transmission signal sequences corresponding to one transport block are obtained.
  • the processing of the receiver corresponding to the opposite is performed by the switching unit 204.
  • the operation of the receiver shown in FIG. 10 is the same as that of the second embodiment.
  • the mobile station apparatus calculates channel information using a signal transmitted from the base station apparatus, and information on the number of streams (rank) applied to the downlink signal is transmitted from the mobile station apparatus to the base station apparatus. To give feedback.
  • rank 4 is transmitted (S551f).
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus, and corresponds to two transport blocks using four streams using two HARQ transmission signal sequences.
  • the downlink data is transmitted and received by the mobile station apparatus (S552f).
  • the process number and the redundancy version are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 1 and 0, respectively, and the process number and RV in the encoded sequence 2 are 2 and 0, respectively (FIG. 26).
  • decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in # Subframe2, and ACK or NACK is transmitted depending on the presence or absence of the error (S553f).
  • the mobile station apparatus since no error has occurred in HARQ retransmission signal sequence 1, the mobile station apparatus transmits ACK to the base station apparatus. Since the occurrence of an error is detected for HARQ retransmission signal sequence 2, the mobile station apparatus transmits NACK to the base station apparatus.
  • the base station apparatus performs retransmission processing in response to ACK / NACK transmitted from the mobile station apparatus in # Subframe3.
  • the base station apparatus determines the number of streams based on the rank information notified from the mobile station apparatus in # Subframe1, and retransmits the transport block 2 using two HARQ transmission signal sequences and four streams.
  • the transport block 2 is provided for both the first encoded sequence / HARQ transmission signal sequence and the second encoded sequence / HARQ transmission signal sequence. Perform resend processing.
  • the rate mobile station apparatus receives this (S554f).
  • the process number and redundancy version information are transmitted simultaneously on the downlink control channel.
  • the process number and RV in the encoded sequence 1 are 2 and 1, respectively, and the process number and RV in the encoded sequence 2 are 2 and 2, respectively. That is, the HARQ transmission signal sequences 1 and 2 indicate that transport blocks corresponding to the encoded sequence 2 transmitted in #Subframe 2 are retransmitted in parallel.
  • the receiver 93 determines which transport block is transmitted based on the process number transmitted on the control channel.
  • control unit 207 since control unit 207 has received signals with process numbers 2 for both HARQ transmission signal sequences 1 and 2, it can be determined that these are one transport block.
  • the control unit 207 outputs, to the switching unit 204, a control signal that associates the HARQ transmission signal sequence 1 with the RV1 of the encoded sequence 2 and the HARQ transmission signal sequence 2 with the RV2 of the encoded sequence 2, and performs the control.
  • #Subframe 5 decoding processing is performed on the HARQ retransmission signal sequence received by the mobile station apparatus in #Subframe 4, and ACK or NACK is transmitted depending on the presence or absence of the error (S555f).
  • S555f the error since no error has occurred for one transmission signal sequence, only one ACK / NACK transmission is required.
  • the mobile station apparatus transmits ACK to the base station apparatus.
  • the sixth embodiment when retransmission occurs in a situation where there is no transport block to be newly transmitted, retransmission using a stream that cannot be used in the conventional method can be performed. It is possible to realize an efficient retransmission that effectively uses the free physical resources. Furthermore, in this embodiment, since data of different redundancy versions can be transmitted in different streams, efficient retransmission with higher coding gain can be realized.
  • the process number notified from the transmitter is used as the information for identifying the transmitted transport block, but the procedure described in the fourth and fifth embodiments is used. Street, redundancy version or transport block size may be used.
  • the retransmission process corresponding to rank 4 has been described. However, as in the third embodiment, the case of rank 3 can be similarly performed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, l'efficacité de communication et un gain de codage d'une retransmission HARQ dans un système de communication MIMO sont améliorés de façon maximale. Un émetteur pour émettre une séquence de signal de transmission HARQ qui est générée à partir d'un bloc de transport qui est la séquence de signal transférée à une couche physique par une couche MAC et qui est mis en correspondance avec l'unité de transmission HARQ génère une pluralité de séquences de signal de transmission HARQ sur la base du même bloc de transport et émet les séquences de signal de transmission HARQ générées en même temps. De plus, les séquences de signal de transmission HARQ correspondent à différentes versions de redondance.
PCT/JP2009/051353 2008-02-04 2009-01-28 Émetteur, récepteur, dispositif de station de base, dispositif de station mobile et système de communication sans fil WO2009098981A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-024534 2008-02-04
JP2008024534 2008-02-04

Publications (1)

Publication Number Publication Date
WO2009098981A1 true WO2009098981A1 (fr) 2009-08-13

Family

ID=40952058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/051353 WO2009098981A1 (fr) 2008-02-04 2009-01-28 Émetteur, récepteur, dispositif de station de base, dispositif de station mobile et système de communication sans fil

Country Status (1)

Country Link
WO (1) WO2009098981A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011030785A1 (fr) * 2009-09-10 2011-03-17 京セラ株式会社 Dispositif de station de base et procédé de commande de communication pour dispositif de station de base
JP2013502816A (ja) * 2009-08-19 2013-01-24 パンテック カンパニー リミテッド 無線通信システムにおける情報転送方法及びその転送装置、その受信装置、受信方法
WO2018020942A1 (fr) * 2016-07-28 2018-02-01 シャープ株式会社 Dispositif station de base, dispositif terminal, et procédé de communication
JP2018513586A (ja) * 2015-03-05 2018-05-24 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 復号マージンに基づく送信特性の構成
JP2019504544A (ja) * 2015-12-14 2019-02-14 ノキア ソリューションズ アンド ネットワークス オサケユキチュア データ再送信

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004376A1 (fr) * 2003-06-30 2005-01-13 Fujitsu Limited Systeme de transmission a entrees multiples et sorties multiples
WO2006030478A1 (fr) * 2004-09-13 2006-03-23 Matsushita Electric Industrial Co., Ltd. Système automatique de commande de requête de re-transmission et méthode de re-transmission pour système mimo-ofdm
WO2006039635A2 (fr) * 2004-10-01 2006-04-13 Qualcomm Incorporated Redondance incrementielle de multiporteuse pour communications sans fil par paquets
WO2006057195A1 (fr) * 2004-11-25 2006-06-01 Matsushita Electric Industrial Co., Ltd. Appareil d’emission a antennes multiples, appareil de reception a antennes multiples et procede de retransmission de donnees
WO2007088579A1 (fr) * 2006-01-31 2007-08-09 Mitsubishi Denki Kabushiki Kaisha Dispositif de transmission radio, dispositif de reception radio et systeme de communication radio

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004376A1 (fr) * 2003-06-30 2005-01-13 Fujitsu Limited Systeme de transmission a entrees multiples et sorties multiples
WO2006030478A1 (fr) * 2004-09-13 2006-03-23 Matsushita Electric Industrial Co., Ltd. Système automatique de commande de requête de re-transmission et méthode de re-transmission pour système mimo-ofdm
WO2006039635A2 (fr) * 2004-10-01 2006-04-13 Qualcomm Incorporated Redondance incrementielle de multiporteuse pour communications sans fil par paquets
WO2006057195A1 (fr) * 2004-11-25 2006-06-01 Matsushita Electric Industrial Co., Ltd. Appareil d’emission a antennes multiples, appareil de reception a antennes multiples et procede de retransmission de donnees
WO2007088579A1 (fr) * 2006-01-31 2007-08-09 Mitsubishi Denki Kabushiki Kaisha Dispositif de transmission radio, dispositif de reception radio et systeme de communication radio

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LG ELECTRONICS: "Efficient support of retransmission using codeword DTX and signaling", 3GPP TSG RAN WG1#51BIS R1-080263, January 2008 (2008-01-01), pages 1 - 3 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013502816A (ja) * 2009-08-19 2013-01-24 パンテック カンパニー リミテッド 無線通信システムにおける情報転送方法及びその転送装置、その受信装置、受信方法
WO2011030785A1 (fr) * 2009-09-10 2011-03-17 京セラ株式会社 Dispositif de station de base et procédé de commande de communication pour dispositif de station de base
JP2011061540A (ja) * 2009-09-10 2011-03-24 Kyocera Corp 基地局装置及び基地局装置の通信制御方法
CN102577492A (zh) * 2009-09-10 2012-07-11 京瓷株式会社 基站装置及基站装置的通信控制方法
US8824425B2 (en) 2009-09-10 2014-09-02 Kyocera Corporation Base station device and communication control method for base station device
JP2018513586A (ja) * 2015-03-05 2018-05-24 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 復号マージンに基づく送信特性の構成
US10506557B2 (en) 2015-03-05 2019-12-10 Telefonaktiebolaget Lm Ericsson (Publ) Decoding margin based configuration of transmission properties
JP2019504544A (ja) * 2015-12-14 2019-02-14 ノキア ソリューションズ アンド ネットワークス オサケユキチュア データ再送信
WO2018020942A1 (fr) * 2016-07-28 2018-02-01 シャープ株式会社 Dispositif station de base, dispositif terminal, et procédé de communication
RU2739589C2 (ru) * 2016-07-28 2020-12-28 Шарп Кабусики Кайся Устройство базовой станции, терминальное устройство и способ связи
US11038625B2 (en) 2016-07-28 2021-06-15 Sharp Kabushiki Kaisha Base station apparatus, terminal apparatus, and communication method

Similar Documents

Publication Publication Date Title
JP6612408B2 (ja) Ｈａｒｑを実装するシステムにおけるコードワード対レイヤ・マッピング
EP2862306B1 (fr) Mappage de retransmissions en réponse à des messages d'accusé de réception négatif groupés associés pour une transmission mimo multicouche
US9461720B2 (en) Methods of receiving retransmissions including discontinuous transmission indicators in MIMO systems
EP2748961B1 (fr) Procédés de sélection de rangs mimo et dispositifs associés
EP2770657A1 (fr) Procédé et dispositif pour la transmission d'un flux de données dans un système mimo
JP6265387B2 (ja) バンドルされたｎａｃｋメッセージに応答して再送をマッピングする方法及び関連する装置
KR20090017973A (ko) 다중입력 다중출력 시스템에서 코드워드를 전송하는 방법
WO2013141772A1 (fr) Procédés et dispositifs relatifs à des communications mimo
CN101689975A (zh) 用于在mimo系统中进行改进的无线电资源分配的方法和设备
WO2009098981A1 (fr) Émetteur, récepteur, dispositif de station de base, dispositif de station mobile et système de communication sans fil
JP2010093449A (ja) 送信装置、受信装置、通信方法および通信システム
CN110266431B (zh) 数据传输方法和设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09708012

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09708012

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP