JP2010093449A - Transmission device, reception device, communication method, and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform efficient communication by equally mapping a plurality of code blocks constituting a transport block to a plurality of frequency bands different in communication quality in transmission and reception. <P>SOLUTION: A transport block 23 to be input to a transmission device A is data to be transmitted. A code block division part 5b divides the transport block data 23 into a plurality of code blocks. An encoding part 5c encodes each code block. A code block connection part 5d connects each of the code blocks in accordance with control information 21 and information stored in a code block connection sequential storage part 5a. A mapping part 15 maps into communication resources and modulates a transport block code word and control information code word output from a transport block transmission processing part 5 and a control information transmission processing part 7, respectively, to be output to the outside as wireless signals through an antenna part 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technology of a data transmission device and a reception device.

  The 3rd Generation Partnership Project (3GPP) is a project that examines and creates specifications for mobile phone systems based on networks developed from W-CDMA (Wideband-Code Division Multiple Access) and GSM (Global System for Mobile Communications). . In 3GPP, the W-CDMA system is standardized as a third generation cellular mobile communication system, and services are started sequentially. Also, HSDPA (High-Speed Downlink Packet Access), which further increases the communication speed, has been standardized and the service has been started. Furthermore, in 3GPP, E-UTRA (Evolved Universal Terrestrial Radio Access), which is an evolution of the third generation radio access technology, and Advanced E-UTRA, which is an advanced version thereof, are being studied.

  FIG. 15 is a diagram illustrating an example of a data transmission method in E-UTRA (see Non-Patent Document 1 below). As shown in FIG. 15, in E-UTRA, a transport block (TB) 101 is defined as a data transmission / reception unit, which is divided into a plurality of small data called code blocks (CB) 103, and the code block Every time, CRC (Cyclic Redundancy Check) 105 calculation and addition of check bits, encoding processing such as error correction encoding processing, rate matching processing, and the like are performed, and a code word (code word) 111 for each code block is created. . After that, they are combined again to create the code word 115 of the transport block. The code word 115 of the transport block is modulated (transport block modulation symbol 117), mapped to communication resources, and transmitted (121, 123, 125). On the receiving side, these operations are reversed to restore the transport block.

  Further, in E-UTRA, HARQ (Hybrid Automatic Repeat reQuest) is adopted as a retransmission method in the case where data transmission / reception is not normally performed due to noise mixing in a radio propagation path. According to this method, when transmission / reception of data fails, a retransmission request is transmitted from the reception device to the transmission device, and the transmission device receiving this is the same transport block codeword as the previous one or RV (Redundancy Version) ) Changed transport block codewords, the error correction capability can be improved at the receiving device, and transport block restoration processing can be performed. Data can be transmitted and received efficiently with a small number of retransmissions. It can be performed.

  In Advanced E-UTRA, in order to dramatically improve communication capacity and transmission speed, a technique called carrier aggregation that handles a plurality of discontinuous frequency bands as one logically continuous communication resource. Is also being considered.

3GPP TS 36.212 V8.3.0 (2008-05) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) Multiplexing and channel coding (Release 8)

  However, in the conventional technology as described above, when code blocks after encoding processing of code blocks are combined to create a transport block code word, they are always combined in the same order. Therefore, for example, as shown in FIG. 15, considering that the transport block codeword 115 is mapped to frequency bands with different communication qualities by carrier aggregation, the frequency band to which each code block is mapped is always As a result, the transmission error rate varies for each code block. For this reason, even if the above-described HARQ retransmission technique is applied, reception of code blocks mapped to a frequency band with poor communication quality may fail even during retransmission. Furthermore, since the HARQ retransmission process is performed in units of transport blocks, if even one of the code blocks constituting the HARQ fails to be received, the entire transport block is retransmitted, and the efficiency is very poor. There was a point.

  The present invention has been made in view of such circumstances, and when mapping and transmitting / receiving transport blocks composed of a plurality of code blocks to a plurality of frequency bands having different communication qualities, It aims at equalizing the mapping to the frequency band and performing efficient communication.

  In order to achieve the above object, the present invention takes the following measures.

  (1) A transmission device that divides one transport block into a plurality of code blocks, performs error correction coding on each of the code blocks, and combines and transmits these code blocks again. When combining the code blocks that have been subjected to error correction coding, the combination order of the code blocks can be changed.

  (2) Further, the receiving apparatus receives a transport block transmitted from the transmitting apparatus, and the plurality of code blocks transmitted from the transmitting apparatus by changing the combination order of the code blocks are changed in the original order. It is characterized by sorting.

  (3) Further, the transmitting apparatus and the receiving apparatus according to the present invention are characterized in that the combination order of the code blocks is transmitted from the transmitting apparatus to the receiving apparatus by control information.

  As described above, even when transport blocks composed of a plurality of code blocks are transmitted using a plurality of frequency bands having different communication qualities, a specific code block is always assigned to the same frequency band and transmitted. Therefore, it is possible to suppress an uneven communication quality for each code block, and to perform efficient communication.

  (4) Further, the transmitting apparatus and the receiving apparatus of the present invention are characterized in that the combination order of code blocks is determined by the HARQ redundant version value.

  In this way, even when transport blocks composed of a plurality of code blocks are transmitted / received using a plurality of frequency bands having different communication qualities, the combination order of the code blocks is changed according to the value of the redundant version of HARQ. Without increasing the amount of control information, a specific code block is not always assigned to the same frequency band and transmitted. Communication can be performed.

  (5) Further, the transmitting apparatus and the receiving apparatus of the present invention are characterized in that the code block combination order is determined by the number of transmissions.

  In this way, even when transmitting / receiving transport blocks composed of a plurality of code blocks using a plurality of frequency bands having different communication qualities, the combination order of the code blocks can be changed according to the number of transmissions, Without increasing the amount of control information, a specific code block is not always assigned and transmitted in the same frequency band, so it is possible to suppress uneven communication quality for each code block, and to achieve efficient communication. It can be carried out.

  (6) Further, the transmission device and the reception device of the present invention are characterized in that the code blocks are arranged and combined in order in bit units.

  In this way, even when transmitting / receiving transport blocks composed of a plurality of code blocks using a plurality of frequency bands having different communication qualities, it is possible to map each code block equally to each frequency band. Since an uneven communication quality of each code block can be suppressed, efficient communication is possible.

  (7) Also, in the transmitting apparatus and the receiving apparatus of the present invention, the code block combining order change is started or terminated by an upper layer such as RRC signaling, and the code block combining order changing method is changed to an upper layer such as RRC signaling. It is specified by.

  As described above, since the upper and lower layers such as RRC signaling can start and end and specify the code block combination order determination method, for example, whether or not the code block combination order is changed depending on the type of channel, or the propagation path status The code block combination order determination method can be selected according to the situation, and the optimum communication method can be selected according to the situation.

  (8) Further, the communication system of the present invention is characterized in that the transmission device and the reception device are configured by the base station device and the mobile station device, respectively.

  With this configuration, it is possible to provide a communication system that can efficiently perform transmission / reception of transport blocks including a plurality of code blocks using a plurality of frequency bands having different communication qualities.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the case where the present invention is embodied in a mobile communication system will be described. However, the present invention is not limited to this and can also be specified as a mobile communication method.

(First embodiment)
FIG. 1 is a functional block diagram showing a configuration example of a transmission apparatus according to the first embodiment of the present invention. As shown in FIG. 1, a transmitting apparatus A according to the present embodiment includes a functional unit 1 including a transport block transmission processing unit 5, a control information transmission processing unit 7, a reception result information reception processing unit 11, and a mapping unit 15. And the antenna unit 17. The transmission device A receives the transport block 23 and control information 21 from the upper layer 3. The transport block 23 is data to be transmitted, and the control information 21 includes the data size of the transport block 23, MCS (information specifying the modulation method and coding method), HARQ RV (Redundancy Version), Information necessary for transmitting the transport block, such as the capacity of the communication resource, is included.

  The transport block transmission processing unit 5 performs transmission processing on the input transport block 23 according to the control information, and outputs a transport block codeword to the mapping unit 15. The control information transmission processing unit 7 performs a process for transmitting the input control information 21 and outputs a control information codeword. The mapping unit 15 maps the transmission block codeword and the control information codeword, which have been output from the transport block transmission processing unit 5 and the control information transmission processing unit 7, to communication resources and Modulation processing or the like is performed, and the signal is output to the outside through the antenna unit 17 as a radio signal. The reception result information reception processing unit 11 performs reception processing on the reception result information received from the antenna unit 17 and outputs the reception result information 25 to the upper layer 3.

  Further, the transport block transmission processing unit 5 includes a code block dividing unit 5b, an encoding unit 5c, a code block combination order storage unit 5a, a code block combining unit 5d, and a memory unit 5e.

  The code block dividing unit 5b divides the transport block data input from the upper layer 3 into a plurality of code blocks. The encoding unit 5c performs CRC check bit addition processing, error correction encoding processing, rate matching processing, and the like on each code block, and outputs the processed data to the code block combining unit 5d as a code block code word. The code block combination order storage unit 5a stores the combination order of code blocks input from the upper layer 3. The combination order storage method of the code block combination order storage unit 5a will be described later.

  The code block combining unit 5d combines the code block code words output from the encoding unit 5c according to the control information input from the higher layer 3 and the information stored in the code block combining order storage unit 5a, The port block code word is output to the mapping unit 15. Details of this coupling method will be described later. In the memory unit 5e, the code block dividing unit 5b, the encoding unit 5c, and the code block combining unit 5d store and output data to be processed.

  FIG. 2 is a functional block diagram showing a configuration example of the receiving apparatus according to the first embodiment of the present invention. As shown in FIG. 2, the receiving apparatus B according to the present embodiment includes a functional unit 31 including a transport block reception processing unit 35, a control information reception processing unit 37, a demapping unit 45, and a reception result information transmission processing unit 41. And an antenna portion 47. The radio signal received by the antenna unit 47 is subjected to demodulation processing, demapping processing, and the like by the demapping unit 45. As a result, the radio signal is separated into a control information codeword and a transport block codeword. And output to the transport block reception processing unit 35. The control information reception processing unit 37 performs reception processing on the control information codeword to extract the control information 51 and outputs the control information 51 to the upper layer 33 and the transport block reception processing unit 35. The transport block reception processing unit 35 performs the reception process of the transport block codeword input from the demapping unit 45 in accordance with the control information 51 input from the control information reception processing unit 37 to restore the transport block 55. To the upper layer 33. In addition, whether or not the decoding result of the restored transport block 55 is correct is checked by CRC, and the result is also output to the upper layer 33 as decoding result information 53. The reception result information transmission processing unit 41 performs transmission processing of the reception result information 57 of the transport block input from the upper layer 33 and transmits the transmission result through the antenna unit 47.

  Further, the transport block reception processing unit 35 includes a code block combination order storage unit 35a, a code block separation unit 35d, a decoding unit 35c, a transport block restoration unit 35b, and a memory unit 35e. The code block separation unit 35d separates the input transport block code word into code block code words for each code block according to the control information 51 input from the control information reception processing unit 37, and further separates them into the code block 1 Are rearranged in order and output to the decoding unit 35c. The decoding unit 35c performs rate dematching processing and error correction decoding processing on each code block codeword, and restores code block data for each code block. Further, each code block data is checked for reception error by CRC, and the result is output to the upper layer 33 as decoding result information.

  FIG. 3 is a diagram illustrating an example of the combination order of code blocks according to the present embodiment. As shown in FIG. 3, each join order is assigned a join order index 0, 1, 2,. For example, in the case of index 0, code block (CB) 1 to code block (CB) 6 are coupled in order, and in the case of index 1, code block 3, 4, 5, 6, 1, 2 is ordered. Combined. The combination order index and the combination order are stored in the code block combination order storage unit 5a in the transmission apparatus A and the code block combination order storage unit 35a in the reception apparatus B. In addition, the code block combining unit 5d in the transmitting apparatus A and the code block separating unit 35d in the receiving apparatus B perform the combining order index included in the control information from the higher layer when performing the code block combining process or the separating process. Are combined from the information stored in the code block combination order storage unit 5a or 35a, and each processing is performed. Note that what is described here is merely an example, and the present invention is not limited to the processing shown in this figure.

  FIG. 4 is a diagram illustrating an example of a sequence when communication is performed using the transmission device and the reception device according to the present embodiment. First, a transport block and control information are transmitted from the transmitting apparatus A to the receiving apparatus B. At this time, the transmitting apparatus A combines the code blocks from the top in the order of the code blocks 1, 2, 3, 4, 5, 6 in the code block combining unit 5d, and sets the combination order index included in the control information to 0. (L1). In the present embodiment, as an example, code blocks 1 and 2 are used for frequency band A with good communication quality, code blocks 3 and 4 are used for frequency band B with the same (intermediate) communication quality, and communication quality is used. A description will be given assuming that code blocks 5 and 6 are mapped to a poor frequency band C. Then, it is transmitted as a radio signal to the receiving device B through the antenna unit 17.

  On the other hand, the receiving device B receives the radio signal transmitted from the transmitting device A by the antenna unit 47 and separates it into a control information codeword and a transport block codeword by the demapping unit 45, and receives the control information respectively. The processing unit 37 and the transport block reception processing unit 35 perform reception processing. At this time, the code block separation unit 35d in the transport block reception processing unit 35 stores the code block combination order storage in accordance with the code block combination order index value (= 0) included in the control information from the control information reception processing unit 37. Referring to the code block combination order stored in the unit 35a, the transport block code word is assigned to the code blocks 1, 2, 3, 4, 5, 6 from the beginning as in the case where the combination order index in FIG. To separate. Then, for each code block, the decoding unit 35c performs rate dematching processing, error correction decoding processing, and inspection of a decoding result by CRC.

  As a result, as an example, as shown in FIG. 4 (81), it is assumed that the decoding results are OK for code blocks 1, 2, and 4, and the decoding results are NG for 3, 5, and 6. As a result, the decoding result of the entire transport block becomes NG, and the decoding result information is output to the upper layer 33. Thereafter, the reception result information (NACK) is output from the upper layer 33 to the receiving apparatus B, the transmission result information transmission processing unit 41 in the receiving apparatus B performs transmission processing, and is transmitted toward the transmitting apparatus A (L2 ).

  Next, when the reception result information transmitted from the reception device B is received by the transmission device A, the reception result information reception processing unit 11 performs reception processing and outputs it to the upper layer 3. After that, the upper layer 3 outputs a transport block retransmission request and control information including the code block combination information index 1 to the transmitting apparatus A. The transport block transmission processing unit 5a converts each code block codeword created at the previous transmission stored in the memory unit 5e into a code block combination index 1 stored in the code block combination order storage unit 5a. According to the code block combination order, the code blocks 3, 4, 5, 6, 1 and 2 are combined in the order as shown in FIG. And it transmits toward the receiving apparatus B with the control information codeword containing the code block coupling | bonding order index 1 transmitted by the control information transmission process part 7 (L3).

  On the other hand, the receiving device B receives the radio signal transmitted from the transmitting device A by the antenna unit 47 as in the previous time, and separates it into a control information codeword and a transport block codeword in the demapping unit 45, The control information reception processing unit 37 and the transport block reception processing unit 35 respectively perform reception processing. At this time, the code block separation unit 35d in the transport block reception processing unit 35 stores the code block combination order storage according to the value (= 1) of the code block combination order index included in the control information from the control information reception processing unit 37. Referring to the code block combination order stored in the part 35a, the transport block code word is assigned to the code blocks 3, 4, 5, 6, 1, 2 from the beginning as in the case where the combination order index of FIG. Are separated into code blocks 1, 2, 3, 4, 5, and 6. Then, the decoding unit 35c performs rate dematching processing, decoding processing, and CRC decoding result inspection for each code block. As a result, among the code blocks whose decoding result is NG during the previous reception process, the decoding result of the code block 3 transmitted in the communication band A with good communication quality becomes OK by this retransmission, and the communication quality becomes parallel. For the code blocks 5 and 6 transmitted in the communication band B, it is assumed that the code block 5 is OK and the code block 6 is NG (83). In that case, as in the previous case, the decoding result of the entire transport block becomes NG again, the decoding result NG is notified to the upper layer 33, and then the reception result information (NACK) output from the upper layer 33 is received. After the result information transmission processing unit 41 performs the transmission process, the result information is transmitted toward the transmission apparatus A (L4).

  Next, when the transmission device A receives the reception result information transmitted from the reception device B again, the same retransmission processing as described above is performed. However, this time, the value of the code block combining order index is set to 2, and the code block combining unit 5d follows the code block combining order when the code block combining index stored in the code block combining order storage unit 5a is 2. As shown in FIG. 3, when the combination order index is 2, the code blocks 5, 6, 1, 2, 3, and 4 are combined in the order, and a transport block code word is generated and received together with the control information code word. Transmission is performed toward the device B (L5). The receiving apparatus B receives the control information codeword including the code block combination order index (= 2) and the transport block codeword from the transmitting apparatus A, and performs respective reception processes. At this time, the code block separation unit 35 d in the transport block reception processing unit 35 stores the code block combination order storage in accordance with the code block combination order index value (= 2) included in the control information from the control information reception processing unit 37. Referring to the code block combination order stored in the unit 35a, the transport block code word is assigned to the code blocks 5, 6, 1, 2, 3, 4 from the beginning as in the case where the combination order index in FIG. Are divided into code blocks 1, 2, 3, 4, 5, and 6. Then, the decoding unit 35c performs rate dematching processing, decoding processing, and CRC decoding result inspection for each code block. As a result, it is assumed that the decoding check result by CRC is OK for the code block 6 whose decoding result is NG in the previous reception process (85). Then, in the transport block restoration unit 35b, all code blocks are combined to create a transport block, which is output to the upper layer 33 together with the decoding result (OK). Thereafter, the reception result information (ACK) is input from the upper layer 33 to the reception device B, and after transmission processing is performed in the reception result information transmission processing unit 41, it is transmitted to the transmission device A (L6). The transmission apparatus A receives and ends the process.

  As described above, according to the transmitting apparatus and the receiving apparatus according to the first embodiment of the present invention, a transport block composed of a plurality of code blocks is transmitted using a plurality of frequency bands having different communication qualities. Even in this case, since a specific code block is not always assigned to the same frequency band and transmitted, it is possible to suppress a deviation in communication quality for each code block and to perform efficient communication.

(Second Embodiment)
Next, a transmission device and a reception device according to the second embodiment of the present invention will be described. Also in the present embodiment, since the transmission device A and the reception device B shown in the examples of FIGS. 1 and 2 are used, description of the configuration is omitted. However, this embodiment is different from the first embodiment in that the code block combination order is uniquely determined by HARQ RV (redundant version).

  FIG. 5 is a diagram illustrating an example of the combination order of code blocks according to the present embodiment. As shown in FIG. 5, different code block (CB) 73 combinations are assigned to correspond to the RVs at the time of transmission, and the code block combination order storage unit 5a in the transmitter A and the receiver B Are stored in the code block combination order storage unit 35a. The code block combining unit 5d in the transmitting device A and the code block separating unit 35d in the receiving device B correspond to the RV value included in the control information input from the upper layer 33 or the control information reception processing unit 37. The code block combination order is read from the code block combination order storage unit 5a or 35a, and each process is performed.

  FIG. 6 is a diagram illustrating an example of a sequence when communication is performed using the transmission device and the reception device according to the present embodiment. The difference from the communication sequence diagram of the first embodiment shown in FIG. 4 is that the value of RV is used to determine the combination order of code blocks. That is, since RV = 0 is transmitted at the first transmission, the transport block codeword is transmitted and received by being combined in the order of the code blocks 1, 2, 3, 4, 5, 6 according to FIG. 5 (L11, L12, 91). Thereafter, in the first time (RV = 1) and the second time (RV = 2) at the time of retransmission, the code blocks 3, 4, 5, 6, 1, 2 and the code blocks 5, 6, 1, 2, 3 are respectively the same. , 4 are combined and transmitted / received (L13 to L16, 93, 95).

  As described above, according to the transmitting apparatus A and the receiving apparatus B according to the second embodiment of the present invention, the transport block composed of a plurality of code blocks is used using a plurality of frequency bands having different communication qualities. Even in the case of transmission, the combination order of code blocks can be changed according to HARQ RV. Therefore, specific code blocks are not always assigned to the same frequency band and transmitted without including special information in the control information, so that it is possible to suppress the communication quality bias for each code block, and to improve efficiency. There is an advantage that the communication can be performed.

(Third embodiment)
Next, a transmission device and a reception device according to the third embodiment of the present invention will be described. Also in the present embodiment, since the transmission device A and the reception device B illustrated in FIGS. 1 and 2 can be used, description of the configuration is omitted. However, the present embodiment is different from the first and second embodiments in that the code block combination order is uniquely determined by the number of times of transmission and reception.

  FIG. 7 is a diagram illustrating an example of the code block combination order according to the present embodiment. As shown in FIG. 7, different code blocks (CB) 101 are assigned in association with the number of times of transmission (in the figure, 1 to 6 are shown). The code block combination order storage unit 5a and the code block combination order storage unit 35a in the receiving apparatus B store the combination order. The code block combining unit 5d in the transmitting apparatus A and the code block separating unit 35d in the receiving apparatus B read the code block combining order corresponding to the number of transmission / reception from the code block combining order storage unit 5a or 35a, respectively. Perform the process.

  Here, the number of transmissions and the combination order are such that the combination order is uniquely determined according to the number of transmissions. For example, the combination order is defined in advance by specifications or the like.

  FIG. 8 is a diagram illustrating an example of a sequence when communication is performed using the transmission device A and the reception device B of the present embodiment. The difference from the communication sequence diagram of the first or second embodiment shown in FIG. 4 or 6 is that the number of transmissions is used to determine the code block combination order. That is, the transport block codeword at the first transmission (first transmission) is transmitted and received by being combined in the order of code blocks 1, 2, 3, 4, 5, 6 according to FIG. 7 (L21, L22, 111). ). Thereafter, in the first retransmission (second transmission) and second retransmission (third transmission), the code blocks 3, 4, 5, 6, 1, 2 (L23 / L24, 113), the code blocks 5, 6, 1, 2, 3, 4 (L25 / L26, 115) are combined and transmitted / received.

  As described above, according to the transmitting apparatus and the receiving apparatus according to the third embodiment of the present invention, transport blocks composed of a plurality of code blocks are transmitted and received using a plurality of frequency bands having different communication qualities. Even in this case, the code block combination order can be changed according to the number of transmissions. Therefore, since it is possible to prevent a specific code block from being always assigned to the same frequency band and transmitted without including special information in the control information, it is possible to suppress an uneven communication quality for each code block. Efficient communication.

(Fourth embodiment)
Next, a transmission device and a reception device according to the fourth embodiment of the present invention will be described. FIG. 9 and FIG. 10 are functional block diagrams showing a configuration example of the transmission device C and the reception device D according to the present embodiment. The difference from the transmitting apparatus A and the receiving apparatus B shown in FIG. 1 and FIG. 2 is that the code block combination order storage unit is not provided, and the other configuration is the same as FIG. 1 and FIG. The description is omitted.

  FIG. 11 is a diagram illustrating an example of each code block codeword combining method in the code block combining unit (5d) in the transmission apparatus C according to the present embodiment. As shown in FIG. 11, first, the 0th bit from the code block 1 (CB1) to the code block n (CBn: last code block) is combined in order. Next, the first bits of code block 1 to code block n are combined in order. Thereafter, this is repeated up to the last bit of the code block to create a transport block code word (see arrow AR). On the other hand, the code block separation unit 35d in the receiving device D according to the present embodiment performs the reverse process to the code block combining unit 5d in the transmitting device C on the received transport block codeword, and each code block code Separate into words.

  FIG. 12 is a diagram illustrating an example of how the transport block codeword configured as illustrated in FIG. 11 is mapped to a plurality of frequency bands in the mapping unit. As shown in FIG. 12, since the codeword of each code block is mapped to each frequency band evenly, even if the communication quality differs for each frequency band, it is possible to eliminate the uneven communication quality for each code block. .

  As described above, according to the transmission device C and the reception device D according to the fourth embodiment of the present invention, a transport block including a plurality of code blocks is used using a plurality of frequency bands having different communication qualities. Even when transmission / reception is performed, each code block can be evenly mapped to each frequency band, and an uneven communication quality of each code block can be suppressed, so that efficient communication is possible.

(Fifth embodiment)
Next, a transmission device and a reception device according to the fifth embodiment of the present invention will be described. In this embodiment, before transmission / reception of the transport block, whether or not to change the combination order of the code blocks, and which combination order change method to use is changed in advance from the transmission apparatus to the reception apparatus. It is characterized by notification. This notification method can be performed by communication between higher layers, for example, RRC signaling.

  FIG. 13 is a diagram illustrating an example of a code block combination order change notification notified from the transmission device to the reception device. As shown in FIG. 13, values 1 to 4 are assigned with the code block combination order determination methods described in the first to fourth embodiments of the present invention, and code block combinations specifying these values are assigned. When the order change notification is notified from the transmission apparatus to the reception apparatus, the code block combination order determination method corresponding to the value is used in the next transmission / reception of the transport block. When the code block combination order change notification value is 0, the code block combination order is not changed, and the code blocks are combined in order from the top.

  FIG. 14 is a diagram illustrating a communication sequence between the transmission device E and the reception device F in the present embodiment. It is assumed that transmitting apparatus E and receiving apparatus F include all the functions of Embodiments 1 to 4 of the present invention. First, a code block combination order change notification with a value set to 2 is transmitted from the transmitting device E to the receiving device F (L31). The transport blocks 1 and 2 sent next are transmitted and received using the RV reference method designated by the value 2 in FIG. 13 as the code block combination order determination method (L32, L33).

  Next, a code block (CB) combination order change notification with a value set to 4 is transmitted from the transmitting device E to the receiving device F (L34). The transport blocks (TB) 3 and 4 to be sent next are transmitted and received using the bit interlace method specified by the value 4 in FIG. 13 as the code block combination order determination method (L35, L36). ). Next, when a code block (CB) combination order change notification with a value set to 0 is transmitted from the transmission device to the reception device (L37), transport blocks (TB) 5 and 6 sent after that are transmitted. Are transmitted by combining the code blocks in order from 1 without changing the combination order of the code blocks (L38 and L39).

  As described above, according to the transmission device and the reception device according to the present embodiment, when transmitting / receiving a transport block composed of a plurality of code blocks, whether or not to change the combination order of the code blocks is determined. When changing, it is possible to specify how to change the combination order by communication between higher layers such as RRC signaling.

  As mentioned above, although each embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to the above-described embodiment, and a design or the like within a range not departing from the gist of the present invention is possible. These are also included in the scope of the present invention.

  In addition, a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed. The “computer system” here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case is also used to hold a program for a certain period of time. The program may be a program for realizing a part of the above-described functions, or may be a program that can realize the above-described functions in combination with a program already recorded in a computer system.

  The present invention is applicable to a communication device.

It is a functional block diagram which shows the example of 1 structure of the transmitter by the 1st Embodiment of this invention. It is a functional block diagram which shows the example of 1 structure of the receiver by the 1st Embodiment of this invention. It is a figure showing an example of the combination order of the code block by this Embodiment. It is a figure which shows an example of the sequence at the time of communicating using the transmitter and receiver by this Embodiment. It is a figure showing an example of the combination order of the code block by the 2nd Embodiment of this invention. It is a figure which shows an example of the sequence at the time of communicating using the transmitter and receiver by this Embodiment. It is a figure showing an example of the coupling | bonding order of the code block in the 3rd Embodiment of this invention. It is a figure which shows an example of the sequence at the time of communicating using the transmitter A and the receiver B of this Embodiment. It is a functional block diagram which shows the example of 1 structure of the transmitter by the 4th Embodiment of this invention. It is a functional block diagram which shows the example of 1 structure of the receiver by this Embodiment. It is a figure which shows an example of each code block codeword coupling | bonding method in the code block coupling | bond part (5d) in the transmission apparatus of this Embodiment. FIG. 12 is a diagram illustrating an example of how a transport block codeword configured as illustrated in FIG. 11 is mapped to a plurality of frequency bands in a mapping unit. It is a figure which shows an example of the code block coupling | bonding order change notification notified with respect to the receiver from the transmitter by the 5th Embodiment of invention. It is a figure which shows the communication sequence between the transmitter A and the receiver B in this Embodiment. It is a figure which shows the example of the transmission method of the data in E-UTRA.

Explanation of symbols

DESCRIPTION OF SYMBOLS A ... Transmission apparatus, 1 ... Function part, 3 ... Upper layer, 5 ... Transport block transmission process part, 7 ... Control information transmission process part, 11 ... Reception result information reception process part, 15 ... Mapping part, 17 ... Antenna part , 21 ... control information, 23 ... transport block, 25 ... reception result information.

Claims (14)

A transmission device that divides one transport block into a plurality of code blocks, performs error correction coding on each of the code blocks, and combines and transmits these code blocks again,
A transmission apparatus comprising: a code block combining unit that changes a combination order of the code blocks when combining the code blocks that have been divided and error correction encoded.   The transmission apparatus according to claim 1, wherein the combination order of the code blocks is transmitted from the transmission apparatus to the reception apparatus according to control information.   The transmission apparatus according to claim 1 or 2, wherein a combination order of the code blocks is determined by a value of a redundant version.   The transmission apparatus according to claim 1 or 2, wherein the combination order of the code blocks is determined by the number of transmissions.   The transmission apparatus according to claim 1, wherein the code blocks are combined in such a manner that the code blocks are sequentially arranged in units of bits.   The transmission apparatus according to claim 1 or 2, wherein the code block combining order change is started or ended by RRC signaling, and a method of changing the code block combining order can be designated by RRC signaling. A reception device that receives a transport block transmitted from the transmission device according to claim 1,
A receiving apparatus, comprising: a transport block restoration unit that rearranges a plurality of code blocks transmitted from the transmitting apparatus with the code block combination order changed, in the original order.   The receiving apparatus according to claim 7, wherein the combination order of the code blocks is transmitted from the transmitting apparatus to the receiving apparatus according to control information.   The receiving apparatus according to claim 8, wherein the combination order of the code blocks is determined by a redundant version value.   The receiving apparatus according to claim 8, wherein the combination order of the code blocks is determined by the number of transmissions.   The receiving apparatus according to claim 8, wherein the code blocks are combined in such a manner that the code blocks are sequentially arranged in units of bits.   The receiving apparatus according to claim 8, wherein the code block combining order change is started or ended by RRC signaling, and a code block combining order changing method can be specified by RRC signaling.   A communication system comprising the transmission device according to any one of claims 1 to 6 and the reception device according to any one of claims 7 to 12. A transmission method in which one transport block is divided into a plurality of code blocks, error correction coding is performed on each of the code blocks, and the code blocks are combined and transmitted again.
A transmission method comprising: a code block combining step for changing a combination order of the code blocks when combining the code blocks that have been divided and error correction encoded.

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