CN101034959A - Mixed automatic retransferring method and its device and system - Google Patents
Mixed automatic retransferring method and its device and systemDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及通信技术，特别是涉及一种混合自动重传的方法及其装置和系统。The present invention relates to communication technology, in particular to a hybrid automatic retransmission method and its device and system.
背景技术Background technique
为了适应高速无线数据业务，提出了高速下行分组接入技术(HSDPA，High Speed Downlink Packet Access)，其中包括自适应编码调制技术(AMC，Adaptive Modulationand Coding)和混合自动重传技术(HARQ，(Hybrid AutoRetransmit Request)。其中，所述AMC技术的核心是根据信道状况的变化改变调制和编码的格式(MCS，Modulation and Coding Scheme)，并使它在系统限制范围内和信道条件相适应，而信道条件则可以通过发送反馈来估计。在AMC系统中，一般用户在信道条件较好的情况下用较高阶的调制方式和较高的编码速率，比如64QAM、码率为3/4的TURBO CODE，这样可以提高数据传输速度和系统的吞吐性能；而在信道条件不太好的情况下则用较低阶的调制编码方式。In order to adapt to high-speed wireless data services, a high-speed downlink packet access technology (HSDPA, High Speed Downlink Packet Access) was proposed, including adaptive coding and modulation technology (AMC, Adaptive Modulation and Coding) and hybrid automatic retransmission technology (HARQ, (Hybrid AutoRetransmit Request). Wherein, the core of the AMC technology is to change the format (MCS, Modulation and Coding Scheme) of modulation and coding according to the change of the channel condition, and make it adapt to the channel condition within the system limit range, and the channel condition Then it can be estimated by sending feedback. In the AMC system, the general user uses a higher-order modulation mode and a higher coding rate when the channel condition is better, such as 64QAM, TURBO CODE with a code rate of 3/4, This can improve data transmission speed and system throughput performance; and in the case of poor channel conditions, a lower-order modulation and coding method is used.
所述混合自动重传技术(HARQ)是指在物理层(PHY)实现数据块的重传，这里的数据块是指在一个传输时间间隔(TTl)内发送的数据。发送端数据块通常会携带能对该数据块进行检错的校验信息，比如循环冗余校验(CRC)，当接收端物理层检测出该数据块出错，即要求发送端对该错误数据块进行重传，这样比在高层要求重传的速度更快。HARQ是自动请求重发(ARQ)的改进，它在ARQ系统中引入了一个前向纠错FEC子系统，这个FEC子系统是用来纠正错误以减少重传的次数。停止等待(SAW)是一种最简单的HARQ形式，所需系统开销非常小。在SAW中，发送端只在发送的数据块被正确接收到之后才开始对下一个数据块进行操作，通常，发送端会使用1比特的标识区分当前需要重传的是老的数据块，还是新数据块的重传，接收端使用一个比特指示传输块是否被正确解码(即反馈应答信息ACK或错误应答信息NACK)。但是，所述SAW存在一个主要的缺点：确认信息不及时，即发送端在发送下一个数据块之前必须等待接收到确认消息。在等待确认信息期间，该信道处于空闲状态，系统资源就被白白的浪费了。The hybrid automatic retransmission technique (HARQ) refers to realizing the retransmission of data blocks at the physical layer (PHY), where the data blocks refer to data sent within a transmission time interval (TT1). The data block at the sending end usually carries check information that can perform error detection on the data block, such as a cyclic redundancy check (CRC). Blocks are retransmitted, which is faster than requiring retransmissions at higher layers. HARQ is an improvement of automatic repeat request (ARQ). It introduces a forward error correction FEC subsystem in the ARQ system. This FEC subsystem is used to correct errors to reduce the number of retransmissions. Stop-and-wait (SAW) is the simplest form of HARQ and requires very little overhead. In SAW, the sender only starts to operate on the next data block after the sent data block is received correctly. Usually, the sender will use a 1-bit identifier to distinguish whether the current data block that needs to be retransmitted is an old data block or a For the retransmission of a new data block, the receiving end uses one bit to indicate whether the transport block is decoded correctly (ie feedback acknowledgment information ACK or error acknowledgment information NACK). However, the SAW has a major disadvantage: the acknowledgment information is not timely, that is, the sender must wait for the acknowledgment message before sending the next data block. While waiting for the confirmation information, the channel is in an idle state, and system resources are wasted in vain.
N通道停止等待混合自动重传(N-channel-SAW-HARQ)在信道上同时并列进行N个SAW的HARQ过程，当下行链路被某个HARQ过程用于传输数据块时，上行链路被用于传输HARQ过程的确认信息，这样系统资源得到充分利用。N-channel stop-waiting hybrid automatic retransmission (N-channel-SAW-HARQ) performs N SAW HARQ processes in parallel on the channel at the same time. When the downlink is used by a HARQ process to transmit data blocks, the uplink is used It is used to transmit the acknowledgment information of the HARQ process, so that system resources can be fully utilized.
目前，当发送较独立数据块时，发送端把较独立数据块分割成小一些的子传输数据块，并对其分别进行编码，每一个子传输数据块都携带自己的循环冗余检验码CRC，如图1所示。这使得在接收端，不同的解码单元可以并行对不同的子传输数据块进行操作，从而加速解码过程。Currently, when sending a relatively independent data block, the sender divides the relatively independent data block into smaller sub-transmission data blocks and encodes them separately. Each sub-transmission data block carries its own cyclic redundancy check code CRC ,As shown in Figure 1. This enables different decoding units to operate on different sub-transport data blocks in parallel at the receiving end, thereby speeding up the decoding process.
接收端解码之后对每一个子传输数据块独立进行CRC校验，确定每一个子传输数据块传输正确与否。当多个子传输数据块全部校验正确时，接收端对整个数据块统一反馈一个应答信息ACK；当多个子传输数据块至少有一个接收错误时，接收端对整个数据块统一反馈一个应答信息NACK。当发送端收到接收端反馈的NACK信息时，需要对整个数据块进行重传，从而浪费不必要的物理资源，接收端根据上次的接收记录可以只对没有正确接收的子传输数据块进行解码；允许传输正确的子传输数据块提前结束解码过程。After decoding, the receiving end independently performs a CRC check on each sub-transmission data block to determine whether the transmission of each sub-transmission data block is correct or not. When multiple sub-transmission data blocks are all checked correctly, the receiving end uniformly feeds back a response message ACK for the entire data block; when multiple sub-transmission data blocks have at least one reception error, the receiving end uniformly feeds back a response message NACK for the entire data block . When the sending end receives the NACK information fed back by the receiving end, it needs to retransmit the entire data block, thus wasting unnecessary physical resources. The receiving end can only retransmit the sub-transmission data blocks that were not received correctly according to the last receiving record. Decoding; allows transmission of the correct sub-transport block to end the decoding process prematurely.
由此可见，现有技术的缺点是，当传输较独立数据块时，如果发送端接收到接收端反馈的NACK应答信息，即使只需要对NACK信息中所述子传输数据块进行重传，也必须重传整个数据块，从而白白的浪费不必要的物理资源。It can be seen that the disadvantage of the prior art is that when transmitting relatively independent data blocks, if the sending end receives the NACK response information fed back by the receiving end, even if only the sub-transmission data blocks in the NACK information need to be retransmitted, The entire data block must be retransmitted, thereby wasting unnecessary physical resources in vain.
发明内容Contents of the invention
本发明解决的技术问题是提供一种混合自动重传方法及其装置和系统，以解决目前技术中重传较独立数据块时，占用不必要的物理资源的问题。The technical problem solved by the present invention is to provide a hybrid automatic retransmission method and its device and system to solve the problem of occupying unnecessary physical resources when retransmitting relatively independent data blocks in the current technology.
为解决上述问题，本发明提供一种混合自动重传方法，包括步骤：In order to solve the above problems, the present invention provides a hybrid automatic retransmission method, comprising steps:
A、发送端的物理层对高层下发的需要切割的传输数据块进行切割，并将切割后的每个子传输数据块添加检错码后映射到单位传输单元上发送给接收端；A. The physical layer of the sending end cuts the transmission data blocks that need to be cut sent by the high layer, and adds an error detection code to each sub-transmission data block after cutting, maps it to the unit transmission unit and sends it to the receiving end;
B、接收端的物理层对接收到的每个子传输数据块进行解码和校验，根据校验结果设置相应的反馈信息发送给发送端，并根据校验结果排序存储子传输数据块；B. The physical layer of the receiving end decodes and verifies each received sub-transmission data block, sets corresponding feedback information according to the verification result and sends it to the sending end, and sorts and stores the sub-transmission data blocks according to the verification result;
C、发送端的物理层根据接收到的反馈信息只对发生错误的、尚未达到最大重传次数的子传输数据块进行重传；C. The physical layer at the sending end only retransmits the sub-transmission data blocks that have errors and have not reached the maximum number of retransmissions according to the received feedback information;
D、接收端的物理层接收到重传子传输数据块后，进行解码和校验，根据校验结果设置并发送相应的反馈信息，并根据校验结果排序存储子传输数据块；如果所有子传输数据块传输正确或需重传的子传输数据块已达到最大重传次数，则接收端的物理层将接收到的全部子传输数据块组成一个独立数据块后向高层发送；否则，执行步骤C、D。D. After receiving the retransmitted sub-transmission data blocks, the physical layer of the receiving end performs decoding and verification, sets and sends corresponding feedback information according to the verification results, and sorts and stores the sub-transmission data blocks according to the verification results; if all sub-transmissions If the data block transmission is correct or the sub-transmission data blocks that need to be retransmitted have reached the maximum number of retransmissions, the physical layer of the receiving end will form all the received sub-transmission data blocks into an independent data block and send it to the upper layer; otherwise, perform steps C, d.
步骤B或D中根据校验结果分别排序存储传输正确的子传输数据块，对于传输正确的子传输数据块存储其解码后的值。In step B or D, the sub-transmission data blocks that are correctly transmitted are sorted and stored respectively according to the verification results, and the decoded values of the sub-transmission data blocks that are correctly transmitted are stored.
步骤B或D中根据校验结果分别排序存储传输正确的和传输错误的子传输数据块，对于传输正确的子传输数据块存储解码后的值；对于传输错误的子传输数据块存储软解码后的值或者软解调后的值。In step B or D, according to the verification results, the correct and incorrect sub-transmission data blocks are sorted and stored respectively, and the decoded values are stored for the correct transmission sub-transmission data blocks; the soft-decoded sub-transmission data blocks are stored for the transmission error value or the value after soft demodulation.
所述排序方式为按照所述接收到的子传输数据块在发射端的顺序进行正确的排序。The sorting manner is to perform correct sorting according to the sequence of the received sub-transmission data blocks at the transmitting end.
步骤D中接收到重传子传输数据块后与相应的以前存储的传输出错的子传输数据块合并后进行解码和校验。After receiving the retransmitted sub-transmission data block in step D, it is combined with the corresponding previously stored sub-transmission data block with an error in transmission, and then decoded and verified.
步骤B中，所述根据校验结果设置相应的反馈信息发送给发送端的过程为：In step B, the process of setting corresponding feedback information and sending it to the sender according to the verification result is:
当多个子传输数据块分别属于不同的混合自动重传过程时，按照混合自动重传过程号的顺序对所述校验结果进行排序，并将排序后的校验结果发送到发送端；或者When the multiple sub-transmission data blocks respectively belong to different HARQ processes, sort the check results according to the order of the HARQ process numbers, and send the sorted check results to the sending end; or
当多个子传输数据块属于同一个混合自动重传过程时，按照所占用的物理资源的约定顺序对所述校验结果进行排序，并将排序后的校验结果发送到发送端。When multiple sub-transmission data blocks belong to the same HARQ process, the verification results are sorted according to the agreed sequence of occupied physical resources, and the sorted verification results are sent to the sending end.
步骤A中所述需要切割的传输数据块是发送端的物理层根据编码器的最优处理能力或者是单位传输单元能够承载的信息量来判断的。The transmission data block that needs to be cut in step A is judged by the physical layer of the sending end according to the optimal processing capability of the encoder or the amount of information that can be carried by a unit transmission unit.
步骤A中将所述每个子传输数据块添加检错码后映射到单位传输单元上发送给接收端，所述单位传输单元是一个时频二维量，一个用户的多个单位传输单元可以占用一个或者连续的多个时间传输单元。In step A, add an error detection code to each sub-transmission data block and map it to a unit transmission unit and send it to the receiving end. The unit transmission unit is a time-frequency two-dimensional quantity, and multiple unit transmission units of a user can occupy One or multiple time transfer units in succession.
步骤C中所述的重传子传输数据块的调制编码方式为：高层下发的基于当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，且所述调制编码格式与该子传输数据块的重传调制编码格式可以相同或者不同于原子传输数据块的调制和编码格式。The modulation and coding method of the retransmitted sub-transmission data block described in step C is: the modulation and coding format selected based on the current physical channel condition or the preset modulation and coding format issued by the high layer, and the modulation and coding format is the same as the sub-transmission data block The retransmission modulation and coding format of the transport data block may be the same as or different from the modulation and coding format of the atomic transmission data block.
在步骤A之前还包括步骤：发送端的高层根据数据块的服务质量和物理信道的质量情况生成一个传输数据块，并将其封装头信息后发送给物理层。Before step A, a step is also included: the upper layer of the sending end generates a transmission data block according to the quality of service of the data block and the quality of the physical channel, and sends it to the physical layer after encapsulating the header information.
另外，本发明还提供一种混合自动重传方法，包括步骤：In addition, the present invention also provides a hybrid automatic retransmission method, including steps:
A、在发送端的物理层中建立重传数据队列，用来存放物理层采用混合自动重传的子传输数据块；A. Establish a retransmission data queue in the physical layer of the sending end to store the sub-transmission data blocks that the physical layer adopts hybrid automatic retransmission;
B、在发送端的物理层中调度并重传所述重传数据队列中存放的传输不成功但未超过混合自动重传最大重传次数的子传输数据块；B. Scheduling and retransmitting in the physical layer of the sending end the sub-transmission data blocks stored in the retransmission data queue whose transmission is unsuccessful but does not exceed the maximum number of retransmissions of hybrid automatic retransmission;
C、在接收端的物理层中设置数据存储队列，接收到子传输数据块后进行解码和校验，根据校验结果设置并发送相应的反馈信息，并根据校验结果排序存储子传输数据块，如果所述数据存储队列中的子传输数据块全部传输正确或者错误的子传输数据块已经到达最大重传次数时，将全部子传输数据块组成一个独立数据块后向高层发送。C. Set up a data storage queue in the physical layer of the receiving end, decode and verify after receiving the sub-transmission data blocks, set and send corresponding feedback information according to the verification results, and sort and store the sub-transmission data blocks according to the verification results, If all sub-transmission data blocks in the data storage queue are transmitted correctly or the wrong sub-transmission data blocks have reached the maximum number of retransmissions, all sub-transmission data blocks are formed into an independent data block and sent to the upper layer.
步骤C中根据校验结果分别排序存储传输正确的子传输数据块，对于传输正确的子传输数据块存储解码后的值。In step C, the sub-transmission data blocks that are correctly transmitted are sorted and stored respectively according to the verification results, and the decoded values are stored for the correct transmission sub-transmission data blocks.
步骤C中根据校验结果分别排序存储子传输数据块和传输错误的子传输数据块，对于传输正确的子传输数据块存储解码后的值；对于传输错误的子传输数据块存储软解码后的值或者软解调后的值。In step C, according to the verification results, the sub-transmission data blocks and the sub-transmission data blocks with transmission errors are sorted and stored respectively, and the decoded values are stored for the transmission correct sub-transmission data blocks; the soft-decoded values are stored for the transmission error sub-transmission data blocks value or the value after soft demodulation.
所述排序方式为按照所述接收到的子传输数据块在发射端的顺序进行正确的排序。The sorting manner is to perform correct sorting according to the sequence of the received sub-transmission data blocks at the transmitting end.
步骤C中当接收到重传子传输数据块后，直接进行解码和校验或者与相应的以前存储的传输出错的子传输数据块合并后进行解码和校验。In step C, when the retransmitted sub-transmission data block is received, decoding and verification are performed directly or combined with the corresponding previously stored sub-transmission data block with errors in transmission, and then decoding and verification are performed.
步骤C中，所述根据校验结果设置并发送相应的反馈信息的过程为：In step C, the process of setting and sending corresponding feedback information according to the verification result is:
当多个子传输数据块分别属于不同的混合自动重传过程时，按照混合自动重传过程号的顺序对所述校验结果进行排序，并将排序后的校验结果发送到发送端；或者When the multiple sub-transmission data blocks respectively belong to different HARQ processes, sort the check results according to the order of the HARQ process numbers, and send the sorted check results to the sending end; or
当多个子传输数据块属于同一个混合自动重传过程时，按照所占用的物理资源的约定顺序对所述校验结果进行排序，并将排序后的校验结果发送到发送端。When multiple sub-transmission data blocks belong to the same HARQ process, the verification results are sorted according to the agreed sequence of occupied physical resources, and the sorted verification results are sent to the sending end.
所述的物理层的调度并重传至少包括：The scheduling and retransmission of the physical layer at least includes:
当发送端的物理层接收到接收端的反馈信息时，如果有传输错误的子传输数据块且重传次数没有达到混合自动重传的最大重传次数，则根据合适的调制和编码方式对该反馈信息中所述发送错误的子传输数据块进行编码调制后发送，直至该子传输数据块传输正确或者重传次数达到混合自动重传的最大重传次数为止。When the physical layer of the sending end receives the feedback information from the receiving end, if there is a sub-transmission data block with a transmission error and the number of retransmissions does not reach the maximum number of retransmissions of HARQ, the feedback information will be sent according to the appropriate modulation and coding method The wrongly transmitted sub-transmission data blocks described in the above are coded and modulated and then sent until the transmission of the sub-transmission data blocks is correct or the number of retransmissions reaches the maximum number of retransmissions of hybrid automatic retransmission.
所述选择合适的调制和编码方式为：高层下发的基于当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，且所述调制编码格式与该子传输数据块的原调制编码格式可以相同或者不同。The selection of the appropriate modulation and coding method is: the modulation and coding format selected based on the current physical channel condition or the preset modulation and coding format delivered by the high layer, and the modulation and coding format is the same as the original modulation and coding format of the sub-transmission data block The formats can be the same or different.
此外，本发明再提供一种混合自动重传发送装置，所述装置包括：In addition, the present invention further provides a hybrid automatic retransmission sending device, which includes:
判断切割单元，用于判断物理层接收到高层的传输数据块是否需要进行切割，并将切割后的子传输数据块添加检错码；The judging and cutting unit is used to judge whether the transmission data block received by the physical layer needs to be cut, and add an error detection code to the cut sub-transmission data block;
数据存储单元，与判断切割单元相连，用于存储切割后的子传输数据块；The data storage unit is connected with the judging and cutting unit, and is used for storing the cut sub-transmission data blocks;
调度重传单元，与数据存储单元相连，用于根据接收到的反馈信息对所述数据存储单元中发送错误的子传输数据块进行调度重传，直至传输正确或者重传的次数达到预设的最大重传次数时，停止对该子传输数据块的重传。The scheduling retransmission unit is connected to the data storage unit, and is used to schedule and retransmit the wrongly transmitted sub-transmission data blocks in the data storage unit according to the received feedback information until the transmission is correct or the number of retransmissions reaches a preset number of times When the maximum number of retransmissions is reached, the retransmission of the sub-transmission data block is stopped.
编码调制单元，与判断切割单元、数据存储单元和调度重传单元分别相连，用于对待传的子传输数据块进行编码调制。The encoding and modulating unit is respectively connected to the judging and cutting unit, the data storage unit and the scheduling and retransmitting unit, and is used for encoding and modulating the sub-transmission data blocks to be transmitted.
所述装置还包括：The device also includes:
数据块生成单元，与判断切割单元相连，发送端的高层根据高层数据块的服务质量和物理信道的质量情况生成一个传输数据块，并将其封装头信息后发送给发送端物理层判断单元。The data block generation unit is connected with the judging and cutting unit. The upper layer of the sending end generates a transmission data block according to the service quality of the upper layer data block and the quality of the physical channel, and sends it to the sending end physical layer judging unit after encapsulating the header information.
此外，本发明又提供一种混合自动重传接收装置，所述装置包括：In addition, the present invention provides a hybrid automatic retransmission receiving device, which includes:
解码和校验单元，当接收到子传输数据块后，进行解码和校验，并根据校验结果设置并发送相应的反馈信息，以及将所述校验结果发送给存储排序单元；The decoding and verification unit performs decoding and verification after receiving the sub-transmission data block, sets and sends corresponding feedback information according to the verification result, and sends the verification result to the storage sorting unit;
存储排序单元，与解码和校验单元相连，用于根据校验结果对于传输正确的子数据块分别进行排序和存储；如果所有的子传输数据块全部传输正确或者错误的子传输数据块已经到达最大重传次数时，将全部子传输数据块组成一个独立数据块后向高层发送。The storage sorting unit is connected with the decoding and verification unit, and is used to sort and store the correct sub-data blocks according to the verification results; if all the sub-transmission data blocks are transmitted correctly or the wrong sub-transmission data blocks have arrived When the maximum number of retransmissions is reached, all sub-transmission data blocks are composed into an independent data block and then sent to the upper layer.
所述存储排序单元包括数据存储子单元，用于根据校验结果对传输正确和传输错误的子传输数据块进行正确的排序和存储。对于传输正确的子传输数据块，存储其解码后的值；对于传输错误的子传输数据块，存储其软解调后的值或者软解码后的值。The storage sorting unit includes a data storage subunit, which is used to sort and store correctly transmitted sub-transmission data blocks and incorrectly transmitted sub-transmission data blocks according to the verification result. For a correctly transmitted sub-transport data block, its decoded value is stored; for a wrongly transmitted sub-transport data block, its soft-demodulated value or its soft-decoded value is stored.
所述装置还包括一个重传合并处理单元，与解码和校验单元和存储排序单元分别相连，用于将接收到重传的子传输数据块与存储排序单元中存储的相应的错误子传输数据块进行合并，并将合并后的子传输数据块发送给解码和校验单元。The device also includes a retransmission combination processing unit, which is respectively connected to the decoding and verification unit and the storage ordering unit, and is used to combine the received retransmitted sub-transmission data blocks with the corresponding error sub-transmission data stored in the storage ordering unit The blocks are combined, and the combined sub-transport data blocks are sent to the decoding and checking unit.
最后，本发明还提供一种混合自动重传系统，所述系统包括：Finally, the present invention also provides a hybrid automatic retransmission system, which includes:
发送端数据重传调度装置，用于存放物理层采用混合自动重传的子传输数据块，并根据高层下发的基于当前物理信道状况和/或物理资源使用情况确定的单位传输单元分配信息调度所述重传数据块队列中存放的传输不成功但未超过混合自动重传最大重传次数的子传输数据块调制编码后发送；The data retransmission scheduling device at the sending end is used to store sub-transmission data blocks that adopt hybrid automatic retransmission in the physical layer, and schedule according to the unit transmission unit allocation information determined based on the current physical channel status and/or physical resource usage issued by the upper layer Sub-transmission data blocks stored in the retransmission data block queue that are unsuccessful in transmission but do not exceed the maximum number of retransmissions of the hybrid automatic retransmission are sent after modulation and encoding;
接收端数据存储合并装置，通过物理层与数据重传调度装置相连，当物理层接收到子传输数据块后，进行解码和校验，根据校验结果分别存储每个传输正确的子传输数据块，并根据校验结果设置并发送相应的反馈信息，如果所有子传输数据块全部传输正确或者错误的子传输数据块已经到达最大重传次数，将全部子传输数据块组成一个独立数据块后向高层发送。The data storage and merging device at the receiving end is connected to the data retransmission scheduling device through the physical layer. When the physical layer receives the sub-transmission data block, it decodes and verifies, and stores each correctly transmitted sub-transmission data block according to the verification result , and set and send corresponding feedback information according to the verification result. If all sub-transmission data blocks are transmitted correctly or the wrong sub-transmission data blocks have reached the maximum number of retransmissions, all sub-transmission data blocks are formed into an independent data block and sent to High-level sending.
所述发送端数据重传调度装置包括：The sending end data retransmission scheduling device includes:
重传数据建立单元，用于存放物理层采用混合自动重传的数据；The retransmission data establishment unit is used to store data that adopts hybrid automatic retransmission at the physical layer;
重传数据调度单元，用于根据高层下发的基于当前物理信道状况和/或物理资源使用情况确定的单位传输单元分配信息调度所述重传数据建立单元中存放的传输不成功但未超过混合自动重传最大重传次数的子传输数据块。A retransmission data scheduling unit, configured to schedule the unsuccessful transmissions stored in the retransmission data establishment unit but not exceeding the mixed Automatically retransmit sub-transmission chunks with maximum number of retransmissions.
编码调制单元，与重传数据建立单元和重传数据调度单元分别相连，用于对待传子传输数据块进行编码调制后发送。The code modulation unit is connected to the retransmission data establishment unit and the retransmission data scheduling unit respectively, and is used for coding and modulating the sub-transmission data block to be transmitted before sending it.
所述接收端数据存储处理装置包括：The data storage and processing device at the receiving end includes:
解码和校验单元，当接收到子传输数据块后，进行解码和校验，并根据校验结果设置并发送相应的反馈信息；The decoding and verification unit performs decoding and verification after receiving the sub-transmission data block, and sets and sends corresponding feedback information according to the verification result;
排序存储处理单元，与解码和校验单元相连，用于对子传输数据块进行正确的排序和存储，当所有子传输数据块全部传输正确或者错误的子传输数据块已经到达最大重传次数，将全部子传输数据块组成一个独立数据块后向高层发送。The sorting storage processing unit is connected with the decoding and verification unit, and is used to correctly sort and store the sub-transmission data blocks. When all the sub-transmission data blocks are transmitted correctly or the wrong sub-transmission data blocks have reached the maximum number of retransmissions, Combine all the sub-transmission data blocks into an independent data block and send it to the upper layer.
所述排序存储处理单元，用于根据校验结果对传输正确的子传输数据块进行正确的排序和存储，对于传输正确的子传输数据块，存储其解码后的值。The sorting and storage processing unit is used to sort and store the correctly transmitted sub-transmission data blocks according to the verification result, and store the decoded values of the correctly transmitted sub-transmission data blocks.
所述排序存储处理单元，用于根据校验结果对传输正确和传输错误的子传输数据块进行正确的排序和存储；对于传输正确的子传输数据块，存储其解码后的值；对于传输错误的子传输数据块存储其软解调后的值或者其软解码后的值。The sorting storage processing unit is used for correctly sorting and storing the sub-transmission data blocks with correct transmission and transmission errors according to the verification results; for the sub-transmission data blocks with correct transmission, storing their decoded values; for transmission errors The sub-transport block of , stores its soft-demodulated value or its soft-decoded value.
所述接收端数据存储处理装置还包括数据合并单元，与解码和校验单元相连和排序存储处理单元分别相连，用于将重传的子传输数据块与存储的相应的错误子传输数据块进行合并。The data storage and processing device at the receiving end further includes a data merging unit, which is connected to the decoding and verification unit and the sorting storage processing unit, respectively, and is used to combine the retransmitted sub-transmission data block with the stored corresponding erroneous sub-transmission data block merge.
由上述技术方案可以看出，本发明所述物理层混合自动重传方案是将混合自动重传设置在物理层，当物理层接收到较独立数据块时，对其进行切割，并将切割后的子数据块分别添加进行检错的校验信息，比如循环冗余校验CRC码，以便于接收端物理层接收到所有子数据块时，通过解码和校验，根据校验结果来判断哪些子数据块传输错误，并将该校验结果反馈给发送端，发送端的物理层只对传输错误的子传输数据块进行重传，直至该子传输块传送正确或重传次数达到最大重传次数，有效的节省了系统物理资源；同时接收端物理层可以将重传的子数据块与以前出错的相应子数据块进行合并；接收端的物理层可以将传输正确的子传输数据块或者全部接收的子数据块(包括超过最大重传次数的错误的子数据块)按照他们在发射端的顺序进行正确的排序，在所有子数据块都传输正确或传输错误的子数据块达到最大重传次数后，组成一个数据块递交给高层。由此可见，本发明有效地节省了物理层资源，缩短了对数据块的处理时间，提高数据传输的效率。It can be seen from the above technical solution that the physical layer hybrid automatic retransmission scheme of the present invention is to set the hybrid automatic retransmission on the physical layer, and when the physical layer receives relatively independent data blocks, it is cut and the cut The sub-data blocks of the sub-data blocks are respectively added with check information for error detection, such as the cyclic redundancy check CRC code, so that when the physical layer of the receiving end receives all the sub-data blocks, it can judge which ones according to the verification results through decoding and verification. The transmission error of the sub-data block, and feedback the verification result to the sender, the physical layer of the sender only retransmits the sub-transmission data block with the transmission error until the sub-transmission block is transmitted correctly or the number of retransmissions reaches the maximum number of retransmissions , which effectively saves system physical resources; at the same time, the physical layer of the receiving end can combine the retransmitted sub-data blocks with the corresponding sub-data blocks that were previously erroneous; the physical layer of the receiving end can transmit the correct sub-transmission data blocks or all received Sub-data blocks (including erroneous sub-data blocks that exceed the maximum number of retransmissions) are correctly sorted according to their order at the transmitter. After all sub-data blocks have been transmitted correctly or the sub-data blocks that have transmitted errors have reached the maximum number of retransmissions, Form a data block and submit it to the upper layer. It can be seen that the present invention effectively saves physical layer resources, shortens the processing time for data blocks, and improves the efficiency of data transmission.
附图说明Description of drawings
图1是现有技术中对数据块的调制编码调制结构示意图；FIG. 1 is a schematic diagram of a modulation, coding and modulation structure for a data block in the prior art;
图2是本发明所混合自动重传方法的流程图；Fig. 2 is a flowchart of the hybrid automatic retransmission method of the present invention;
图3是本发明所述方法中发送端和接收端的具体处理过程的流程图；Fig. 3 is the flowchart of the specific processing procedure of sending end and receiving end in the method for the present invention;
图4是本发明所述混合自动重传方法的又一流程图；Fig. 4 is another flowchart of the hybrid automatic retransmission method described in the present invention;
图5是本发明所述混合自动重传发送装置的结构示意图；Fig. 5 is a schematic structural diagram of the hybrid automatic retransmission sending device according to the present invention;
图6是本发明所述混合自动重传接收装置的结构示意图；Fig. 6 is a schematic structural diagram of a hybrid automatic repeat receiving device according to the present invention;
图7是本发明所述混合自动重传系统的结构示意图；Fig. 7 is a schematic structural diagram of the hybrid automatic retransmission system of the present invention;
图8A是本发明所述方法中新数据传输时发送端和接收端的处理过程的示意图；Fig. 8A is a schematic diagram of the processing process of the sending end and the receiving end during new data transmission in the method of the present invention;
图8B是本发明所述方法中重传数据时发送端和接收端的处理过程的示意图。FIG. 8B is a schematic diagram of the processing procedures of the sending end and the receiving end when retransmitting data in the method of the present invention.
具体实施方式Detailed ways
本发明的技术方案是将混合自动重传(HARQ)设置在物理层，当发送端的物理层传输较独立数据块(即大的数据块，以下类同不再重述)时，发送端根据编码器的最优处理能力或者是单位传输单元能够承载的信息量来对需要传输的数据块进行切割，并为切割后的子传输数据块分别添加检错码(比如循环冗余校验码)存储，并进行调制编码后发送，其中所述单位传输单元为一个时频二维量，一个用户的多个单位传输单元可以占用一个或者连续的多个时间传输单元；接收端的物理层对接收到的子传输数据块进行解码和校验，根据校验结果设置相应的反馈信息发送给发送端，所述反馈信息包括应答信息ACK和NACK，并根据校验结果分别按照所述接收到的子传输数据块在发射端的顺序进行正确的排序后，存储传输正确的子传输数据块(存储的形式可以是解码后的值，但并不限于所公开的方式，还可以是其它的方式。)，也可以根据校验结果按照所述接收到的子传输数据块在发射端的顺序进行正确的排序后，同时存储传输正确和传输错误的子传输数据块(存储的形式可以是软解调后的值或者软解码后的值，但并不限于所公开的这两种方式，还可以是其它的方式。)以便于与相应重传的子传输数据块进行合并；接收端的物理层接收到反馈信息后，只对传输错误的子传输数据块进行重传，而并非对整个数据块进行重传，直至根据接收方物理层反馈的校验信息，该子传输块传送正确或重传次数达到最大重传次数(此时可以清空相应的存储单元)，从而减少不必要的物理层资源的占用；接收端的物理层接收重传的子传输数据块后，直接进行解码和校验或者与已存储的相应的子传输数据块进行合并(所述合并的方式包括：最大比合并、等增益合并或者以其他的方式合并)，再进行解码和校验，根据校验结果设置相应的反馈信息发送给发送端，并根据校验结果分别排序(具体排序原则，即按照所述接收到的子传输数据块在发射端的顺序进行正确的排序后，)存储传输正确的子传输数据块，或者类似于上述包括传输正确和传输错误的子传输数据块；另外，当全部子传输数据块都传输正确或错误子传输数据块的重传次数达到预定的最大重传次数时，接收端的物理层将接收到的所有子传输数据块(包括传输正确和超过最大传输次数的错误子传输数据块)组成一个总的数据块或者重新排序(具体排序原则，如前所述)后组成一个总的数据块发送给高层。The technical solution of the present invention is to set the hybrid automatic retransmission (HARQ) at the physical layer. When the physical layer of the sending end transmits a relatively independent data block (that is, a large data block, the following is similar and will not be repeated), the sending end will be based on the code. According to the optimal processing capability of the device or the amount of information that can be carried by a unit transmission unit, the data blocks to be transmitted are divided, and error detection codes (such as cyclic redundancy check codes) are added to the divided sub-transmission data blocks for storage. , and transmit after modulation and coding, wherein the unit transmission unit is a time-frequency two-dimensional quantity, and multiple unit transmission units of a user may occupy one or multiple consecutive time transmission units; The sub-transmission data block is decoded and verified, and the corresponding feedback information is set and sent to the sender according to the verification result. The feedback information includes the response information ACK and NACK, and according to the verification result, the received sub-transmission data After the order of the blocks at the transmitting end is correctly sorted, store and transmit the correct sub-transmission data block (the stored form may be a decoded value, but is not limited to the disclosed method, and may also be other methods.), or According to the verification result, after correct sorting is performed according to the sequence of the received sub-transmission data blocks at the transmitting end, the sub-transmission data blocks that are transmitted correctly and incorrectly transmitted are stored at the same time (the stored form can be a value after soft demodulation or a soft The decoded value, but not limited to the disclosed two methods, can also be other methods.) so as to be combined with the corresponding retransmitted sub-transmission data blocks; after receiving the feedback information, the physical layer at the receiving end only Retransmit the wrong sub-transmission data block instead of retransmitting the entire data block until the sub-transmission block is transmitted correctly or the number of retransmissions reaches the maximum number of retransmissions ( At this time, the corresponding storage unit can be cleared), thereby reducing unnecessary physical layer resource occupation; after receiving the retransmitted sub-transmission data block, the physical layer of the receiving end directly performs decoding and verification or matches the stored corresponding sub-transmission data block Data blocks are merged (the way of merging includes: maximum ratio merging, equal gain merging, or merging in other ways), then decode and check, set corresponding feedback information according to the check result and send it to the sender, and according to The verification results are sorted separately (the specific sorting principle, that is, after the correct sorting is performed according to the order of the received sub-transmission data blocks at the transmitter), and the correct sub-transmission data blocks are stored, or similar to the above-mentioned including transmission correctness and transmission Wrong sub-transmission data blocks; in addition, when all sub-transmission data blocks are transmitted correctly or the number of retransmissions of the wrong sub-transmission data blocks reaches the predetermined maximum number of retransmissions, the physical layer of the receiving end will receive all sub-transmission data blocks (Including correct transmission and error sub-transmission data blocks exceeding the maximum number of transmissions) form a total data block or reorder (the specific ordering principle, as mentioned above) to form a total data block and send it to the upper layer.
为了叙述简便，下面提到的排序原则均是基于前述原则，以后不再赘述。For the sake of brevity, the sorting principles mentioned below are all based on the aforementioned principles, and will not be repeated hereafter.
为了便于本领域技术人员的理解，下面结合附图对本发明做进一步的描述，本发明所述的高层对于WCDMA系统可以是指媒体接入控制层MAC，而对于演进后的无线通信系统可以是指演进媒体接入控制层E-MAC，但并不限于所公开的这两种方式，还可以是其它的层。In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings. The high layer described in the present invention can refer to the medium access control layer MAC for the WCDMA system, and can refer to the wireless communication system after evolution. Evolved media access control layer E-MAC is not limited to the two methods disclosed, and can also be other layers.
请参阅图2，为本发明所述混合自动重传方法的流程图。所述方法包括：首先，发送端的高层根据数据块的服务质量和物理信道的质量情况生成一个传输数据块，并将其封装头信息后发送给物理层，然后执行以下步骤：Please refer to FIG. 2 , which is a flow chart of the HARQ method of the present invention. The method includes: firstly, the upper layer of the sending end generates a transmission data block according to the quality of service of the data block and the quality of the physical channel, and sends it to the physical layer after encapsulating header information, and then performs the following steps:
步骤S10：发送端的物理层对接收到的需要切割的传输数据块进行切割，并将切割后的每个子传输数据块添加检错码编码存储，并编码调制后映射到单位传输单元上发送给接收端；Step S10: The physical layer at the sending end cuts the received transmission data blocks that need to be cut, and adds an error detection code to each sub-transmission data block after cutting, encodes and stores them, and maps them to the unit transmission unit after encoding and modulation, and sends them to the receiver end;
步骤S11：接收端的物理层对接收到的每个子传输数据块进行解码和校验，根据校验结果设置相应的反馈信息发送给发送端，并根据校验结果排序存储子传输数据块；Step S11: The physical layer of the receiving end decodes and verifies each received sub-transmission data block, sets corresponding feedback information according to the verification result and sends it to the sending end, and sorts and stores the sub-transmission data blocks according to the verification result;
步骤S12：发送端的物理层根据接收到反馈信息对发送错误的子传输数据块进行重传，直至根据接收方物理层反馈的校验信息，该子传输块传送正确或重传次数达到最大重传次数为止；Step S12: The physical layer of the sender retransmits the incorrectly transmitted sub-transmission data block according to the received feedback information until the sub-transmission block is transmitted correctly or the number of retransmissions reaches the maximum retransmission according to the verification information fed back by the receiver's physical layer up to the number of times;
步骤S13：接收端的物理层接收到重传子传输数据块后，进行解码和校验，根据校验结果设置并发送相应的反馈信息，并根据校验结果排序存储子传输数据块；如果所有子传输数据块传输正确或需重传的子传输数据块已达到最大重传次数，则接收端的物理层将接收到的全部子传输数据块组成一个独立数据块后向高层发送；否则，执行步骤S12和S13。Step S13: After receiving the retransmitted sub-transmission data blocks, the physical layer of the receiving end performs decoding and verification, sets and sends corresponding feedback information according to the verification results, and sorts and stores the sub-transmission data blocks according to the verification results; if all sub-transmission data blocks If the transmission data block is correctly transmitted or the sub-transmission data block that needs to be retransmitted has reached the maximum number of retransmissions, the physical layer of the receiving end will form all the received sub-transmission data blocks into an independent data block and send it to the upper layer; otherwise, perform step S12 and S13.
也就是说，本发明根据信道条件、物理层资源使用情况等因素为发送端安排发送数据块的大小并分配相应的系统物理资源。当有新数据传输和数据发生重传时，发送端和接收端的处理过程具体详见图3，其具体的实现过程为：That is to say, the present invention arranges the size of the sending data block for the sending end and allocates corresponding system physical resources according to factors such as channel conditions and physical layer resource usage. When there is new data transmission and data retransmission, the processing process of the sending end and the receiving end is shown in Figure 3. The specific implementation process is as follows:
发送端的高层根据数据块服务质量要求QoS、物理信道的质量情况等生成一个传输数据块，在该传输数据块前添加高层头信息(高层header信息)，比如序列号、优先队列号等，然后高层将添加头信息后的传输数据块发送给本端的物理层。本端的物理层接收到所述传输数据块后，首先根据编码器的最优处理能力或单位传输单元所能承载的信息量来判断否要对本次传输的数据块进行切割。如果超过编码器的最优处理能力或单位传输单元所能承载的信息量，则对传输的数据块进行切割，并将切割后的子传输数据块分别添加各自的检错码(比如循环冗余校验码CRC)存储，对于切割后的子传输数据块可以分别属于不同的混合自动重传HARQ过程，也可以属于同一个HARQ过程。然后对各个子传输数据块分别进行相应的调制和编码，并将其映射到单位传输单元上发送。接收端的物理层接收到这些子传输数据块后，分别对每个子传输数据块进行解码和校验，根据每个子传输数据块的校验结果设置相应的反馈信息，即如果某个子传输数据块的校验结果正确，则将对应的反馈信息设置为应答信息ACK，否则，将对应的反馈信息设置为应答信息NACK，之后把携带所有校验结果的反馈信息发送到所述子传输数据块的发送端；其中，所述根据校验结果设置相应的反馈信息发送给发送端的过程具体为：当多个子传输数据块分别属于不同的HARQ过程时，按照HARQ过程号的顺序对校验结果进行排序，并将排序后的校验结果发送到发送端；当多个子传输数据块属于同一个HARQ过程时，按照所占用的物理资源的约定顺序对所述校验结果进行排序，并将排序后的校验结果发送到发送端。同时，将传输正确的子传输数据块或者包括传输正确和传输错误的子传输数据块分别排序存储在接收端的物理层，存储错误的子传输数据块以便与下次的重传版本进行合并。当发送端接收到的反馈信息中有NACK时，组织物理层仅仅对传输错误的子传输数据块选择合适的编码和调制操作，把所述错误的一个或多个子传输数据块映射到单位传输单元上重新进行发送，直至根据接收方物理层反馈的校验信息，该子传输块传送正确或重传次数达到最大重传次数(此时，可以清空相应的存储单元)，其中，对需要传输的子传输数据块进行合适的编码和调制操作方式可以是高层下发的基于当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，即可以与该子传输数据块的原调制和编码格式相同或者不同，但不限于所公开的这几种方式，还可以包括其他的方式。接收端的物理层接收到这些重传的子传输数据块后，直接进行解码和校验或者与已存储的错误版本进行合并后再进行解码和校验，所述合并的方式包括：最大比合并、等增益合并或者以其他的方式合并。根据每个子传输数据块的校验结果设置相应的反馈信息(即ACK或NACK)，之后把校验结果根据每个子传输数据块的HARQ过程号或物理资源的约定顺序，发送到数据块发送端；同时，对本次接收正确的子传输数据块，根据每个子传输数据块的HARQ过程号的顺序或物理资源的约定顺序，与接收端物理层存储的上次接收正确的其他数据块进行重排序；如果没有达到最大重传次数限制并且仍有接收错误的子传输数据块，则重新执行数据块发送端根据接收到的反馈信息中有NACK，组织本端物理层对传输错误的子传输数据块进行重传的过程，否则，接收端的物理层将全部接收正确的子传输数据块或者仍存在错误但已达到最大重传次数限制的所有子传输数据块(包括错误的)组成一个独立数据块或者进行正确排序后，组合成一个独立数据块后发送给接收端的高层，如果在所述的独立数据块中仍有传输错误的数据块，则留待高层或者更高层的重传来完成。The high-level at the sending end generates a transmission data block according to the QoS requirements of the data block, the quality of the physical channel, etc., and adds high-level header information (high-level header information) before the transmission data block, such as sequence number, priority queue number, etc., and then the high-level Send the transmission data block after adding the header information to the physical layer of the local end. After receiving the transmission data block, the physical layer at the local end first judges whether to cut the data block for this transmission according to the optimal processing capability of the encoder or the amount of information that can be carried by a unit transmission unit. If it exceeds the optimal processing capability of the encoder or the amount of information that can be carried by a unit transmission unit, the transmitted data block is cut, and the divided sub-transmission data blocks are respectively added with their own error detection codes (such as cyclic redundancy Check code CRC) storage, the divided sub-transmission data blocks may respectively belong to different hybrid automatic repeat transmission HARQ processes, or may belong to the same HARQ process. Then corresponding modulation and coding are performed on each sub-transmission data block, and they are mapped to unit transmission units for transmission. After receiving these sub-transmission data blocks, the physical layer of the receiving end decodes and verifies each sub-transmission data block respectively, and sets corresponding feedback information according to the verification result of each sub-transmission data block, that is, if a sub-transmission data block If the verification result is correct, set the corresponding feedback information as the response information ACK, otherwise, set the corresponding feedback information as the response information NACK, and then send the feedback information carrying all the verification results to the sending of the sub-transport data block terminal; wherein, the process of setting corresponding feedback information according to the check result and sending it to the sender is specifically: when multiple sub-transmission data blocks respectively belong to different HARQ processes, sort the check results according to the order of the HARQ process numbers, And send the sorted verification results to the sending end; when multiple sub-transmission data blocks belong to the same HARQ process, sort the verification results according to the agreed order of the occupied physical resources, and send the sorted verification results The test result is sent to the sender. At the same time, the correct sub-transmission data blocks or the sub-transmission data blocks including correct transmission and transmission errors are sorted and stored in the physical layer of the receiving end, and the wrong sub-transmission data blocks are stored for merging with the next retransmission version. When there is NACK in the feedback information received by the sending end, the organization physical layer only selects the appropriate coding and modulation operation for the transmission error sub-transmission data block, and maps the erroneous one or more sub-transmission data blocks to the unit transmission unit resend on the receiver until, according to the verification information fed back by the receiver's physical layer, the transmission of the sub-transmission block is correct or the number of retransmissions reaches the maximum number of retransmissions (at this time, the corresponding storage unit can be cleared). The appropriate encoding and modulation operation mode for the sub-transmission data block can be the modulation and coding format selected based on the current physical channel conditions or the preset modulation and coding format issued by the high layer, that is, it can be consistent with the original modulation and coding of the sub-transmission data block The formats are the same or different, but are not limited to the disclosed methods, and may also include other methods. After receiving these retransmitted sub-transmission data blocks, the physical layer of the receiving end directly performs decoding and verification or merges them with the stored error version before decoding and verification. The combining methods include: maximum ratio combining, Equal gain combining or combining in other ways. Set the corresponding feedback information (i.e. ACK or NACK) according to the verification result of each sub-transmission data block, and then send the verification result to the data block sender according to the HARQ process number of each sub-transmission data block or the agreed sequence of physical resources ; At the same time, for the correct sub-transmission data block received this time, according to the order of the HARQ process number of each sub-transmission data block or the agreed order of physical resources, it is re-received with other data blocks received correctly last time stored in the physical layer of the receiving end. Sorting; if the maximum number of retransmissions is not reached and there are still received wrong sub-transmission data blocks, re-execute the data block. According to the received feedback information, there is NACK, and organize the physical layer of the local end to transmit wrong sub-transmission data Otherwise, the physical layer at the receiving end will receive all the correct sub-transmission data blocks or all sub-transmission data blocks (including errors) that still have errors but have reached the maximum number of retransmissions to form an independent data block Or after correct sorting, combine into an independent data block and send it to the upper layer of the receiving end. If there are still transmission error data blocks in the independent data block, it is left to be retransmitted by the upper layer or a higher layer to complete.
另外，本发明还提供一种混合自动重传方法，该方法的流程图详见图4，所述方法包括步骤：In addition, the present invention also provides a hybrid automatic retransmission method, the flowchart of the method is shown in Figure 4, and the method includes steps:
步骤H10：在发送端的物理层中建立重传数据队列，用来存放物理层采用混合自动重传的子传输数据块；Step H10: Establish a retransmission data queue in the physical layer of the sending end to store the sub-transmission data blocks that the physical layer adopts hybrid automatic retransmission;
步骤H11：在发送端的物理层中调度并重传所述重传数据块队列中存放的传输不成功但未超过混合自动重传最大重传次数的子传输数据块；Step H11: Scheduling and retransmitting the sub-transmission data blocks stored in the retransmission data block queue in the physical layer of the sending end that have not been successfully transmitted but have not exceeded the maximum number of retransmissions of hybrid automatic retransmission;
步骤H12：在接收端的物理层中设置数据存储队列，接收到子传输数据块后进行解码和校验，根据校验结果设置并发送相应的反馈信息，并根据校验结果排序存储子传输数据块，如果所述数据存储队列中的子传输数据块全部传输正确或者错误的子传输数据块已经到达最大重传次数时，将全部子传输数据块组成一个独立数据块后向高层发送。Step H12: Set up a data storage queue in the physical layer of the receiving end, decode and verify after receiving the sub-transmission data blocks, set and send corresponding feedback information according to the verification results, and sort and store the sub-transmission data blocks according to the verification results , if all the sub-transmission data blocks in the data storage queue are transmitted correctly or the wrong sub-transmission data blocks have reached the maximum number of retransmissions, form all the sub-transmission data blocks into an independent data block and send it to the upper layer.
其中，步骤H11中所述物理层的调度并重传至少包括：当发送端的物理层接收到接收端的反馈信息时，根据合适的调制和编码方式对该反馈信息中所述发送错误的子传输数据块进行编码调制后发送(所述合适的调制和编码方式可以是高层下发的基于当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，即可以与该子传输数据块的原调制和编码格式相同或者不同，)，直至根据接收方物理层反馈的校验信息，该子传输块传送正确或重传次数达到最大重传次数为止。Wherein, the scheduling and retransmission of the physical layer in step H11 at least includes: when the physical layer of the sending end receives the feedback information from the receiving end, according to the appropriate modulation and coding method, the wrongly transmitted sub-transmission data block in the feedback information Send after coding and modulation (the appropriate modulation and coding method can be the modulation and coding format selected based on the current physical channel condition issued by the high layer or the preset modulation and coding format, that is, it can be the same as the original modulation and coding format of the sub-transmission data block It is the same as or different from the encoding format), until the sub-transmission block is transmitted correctly or the number of retransmissions reaches the maximum number of retransmissions according to the verification information fed back by the receiver's physical layer.
其中，步骤H12中所述接收端的物理层对接收到的子传输数据块或者如果支持重传合并，对于重传合并后的子传输数据块进行解码和校验。Wherein, the physical layer at the receiving end in step H12 decodes and verifies the received sub-transmission data blocks or, if retransmission combining is supported, the sub-transmission data blocks after retransmission combining.
本发明所述方法的具体实现过程与上述方法的实现过程相同，具体详见上述，在此不再赘述。The specific implementation process of the method of the present invention is the same as that of the above-mentioned method, see the above for details, and will not be repeated here.
此外，本发明还提供一种混合自动重传发送装置，所述装置的结构示意图详见图5。所述装置包括：判断切割单元11、数据存储单元12、调度重传单元13、编码调制单元14和/或数据块生成单元15。其中，所述判断切割单元11，用于判断物理层接收到高层的传输数据块是否需要进行切割，并将切割后的子传输数据块添加检错码；所述数据存储单元12，与判断切割单元11相连，用于存储切割后的子传输数据块；所述调度重传单元13与数据存储单元12相连，根据接收到的反馈信息对所述数据存储单元中的发送错误的子传输数据块进行调度重传，直至重传的次数达到预设的最大重传次数时，放弃对该子传输数据块的重传；所述编码调制单元14，与判断切割单元11、数据存储单元12和调度重传单元13分别相连，用于对待传的子传输数据块进行编码调制。所述数据块生成单元15，与判断切割单元11相连，发送端的高层根据高层数据块的服务质量和物理信道的质量情况生成一个传输数据块，并将其封装头信息后发送给发送端物理层判断单元。In addition, the present invention also provides a hybrid automatic retransmission sending device, and the structural diagram of the device is shown in FIG. 5 for details. The device includes: a
对应的，本发明还提供一种混合自动重传接收装置，所述装置的结构示意图详见图6。本发明所述接收装置可以与接收装置配套使用，也可以独立使用。其中，所述混合自动重传接收装置包括：解码和校验单元21和存储排序单元23，如果支持重传合并，还包括重传合并处理单元22。其中，所述解码和校验单元21，用于对接收到的子传输数据块或者如果支持重传合并，对经过重传合并的子传输数据块进行解码和校验，并根据校验结果设置并发送相应的反馈信息，以及将所述校验结果发送给存储排序单元；所述重传合并处理单元22，与解码和校验单元21和存储排序单元23分别相连，用于将接收到重传的子传输数据块与存储排序单元中存储的相应的错误子传输数据块进行合并，并将合并后的子传输数据块发送给解码和校验单元；所述存储排序单元23，与解码和校验单元21相连，用于根据子传输数据块的校验结果分别对于传输正确的子传输数据块或者包括传输正确和传输错误的子传输数据块按照他们在发射端的顺序进行正确的排序和存储，对于传输正确的子传输数据块，可以存储其解码后的值；对于传输错误的子传输数据块，可以存储其软解调后的值或者其软解码后的值，但并不限于所公开的这两种方式，还可以是其它的方式；如果所述子传输数据块全部正确或者错误的子传输数据块已经到达最大重传次数时，将全部子传输数据块组成一个独立数据块或者进行正确的排序后，组成一个独立数据块后向高层发送。Correspondingly, the present invention also provides a hybrid automatic retransmission receiving device, and a schematic structural diagram of the device is shown in FIG. 6 . The receiving device of the present invention can be used together with the receiving device, or can be used independently. Wherein, the hybrid automatic repeat receiving device includes: a decoding and checking unit 21 and a storage sorting unit 23, and if retransmission combining is supported, a retransmission combining processing unit 22 is also included. Wherein, the decoding and verification unit 21 is configured to decode and verify the received sub-transmission data block or if retransmission combination is supported, the sub-transmission data block that has been retransmitted and combined, and set And send the corresponding feedback information, and send the verification result to the storage ordering unit; the retransmission combining processing unit 22 is connected to the decoding and verification unit 21 and the storage ordering unit 23 respectively, and is used to receive the retransmission The transmitted sub-transmission data block is merged with the corresponding error sub-transmission data block stored in the storage ordering unit, and the combined sub-transmission data block is sent to the decoding and verification unit; the storage ordering unit 23, together with the decoding and The checking unit 21 is connected to each other, and is used to sort and store correctly transmitted sub-transmission data blocks or sub-transmission data blocks including transmission correctness and transmission errors according to their order at the transmitting end according to the verification results of the sub-transmission data blocks , for the correctly transmitted sub-transport data block, its decoded value can be stored; for the wrongly transmitted sub-transport data block, its soft-demodulated value or its soft-decoded value can be stored, but not limited to the disclosed These two ways can also be other ways; if the sub-transmission data blocks are all correct or the wrong sub-transmission data blocks have reached the maximum number of retransmissions, all the sub-transmission data blocks are formed into an independent data block or performed After correct sorting, an independent data block is formed and sent to the upper layer.
本发明所述发送和接收装置中各个单元的功能与本发明所述方法的各个步骤的实现过程相同，具体请参考前述，在此不在赘述。The functions of each unit in the sending and receiving device of the present invention are the same as the implementation process of each step of the method of the present invention, please refer to the foregoing for details, and details are not repeated here.
最后，本发明又提供一种混合自动重传系统，所述系统的结构示意图详见图7，所述系统包括：发送端数据重传调度装置31和接收端数据存储合并装置32。其中，所述发送端数据重传调度装置31，用于存放物理层采用混合自动重传的子传输数据块，并根据高层下发的基于当前物理信道状况和/或物理资源使用情况确定的单位传输单元分配信息调度本装置中存放的传输不成功但未超过混合自动重传最大重传次数的子传输数据块，选择合适的调制编码方式后发送，其所述的合适的调制编码方式为：高层下发的基于当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，且所述调制编码格式与该子传输数据块的原调制编码格式可以相同或者不同；所述接收端数据存储合并装置32，通过物理层与数据重传调度装置31相连，用于将物理层接收到的子传输数据块或者如果支持重传合并时将重传合并后的子传输数据块进行解码和校验，根据校验结果分别排序和存储传输正确的子传输数据块或者包括传输正确和传输错误的子传输数据块，并根据校验结果设置并发送相应的反馈信息，同时当所述接收端数据存储合并装置32中的子传输数据块全部正确或者错误的子传输数据块已经到达最大重传次数，将全部子传输数据块组成一个独立数据块或者进行正确的排序后，组成一个独立数据块向高层发送。Finally, the present invention further provides a hybrid automatic retransmission system. The structure schematic diagram of the system is shown in FIG. Wherein, the data
所述发送端数据重传调度装置31包括：重传数据建立单元311、重传数据调度单元312和编码调制单元313。所述重传数据建立单元311，用于存放物理层采用混合自动重传的数据；所述重传数据调度单元312，与重传数据建立单元311相连，用于根据高层下发的基于当前物理信道状况和/或物理资源使用情况确定的单位传输单元分配信息调度所述重传数据建立单元311中存放的传输不成功但重传次数未超过最大重传次数的子传输数据块，所述编码调制单元313与重传数据建立单元311和重传数据调度单元312分别相连，用于对待传输的子传输数据块进行编码调制后发送。The sending end data
所述接收端数据存储处理装置32包括：解码和校验单元321和排序存储处理单元322，如果允许重传合并，还包括数据合并单元323。所述解码和校验单元321，用于对接收到的子传输数据块或者如果支持重传合并时，重传合并后的子传输数据块进行解码和校验，并根据校验结果设置并发送相应的反馈信息；所述排序存储处理单元322，与解码和校验单元321相连，用于对经校验确认正确的子传输数据块或包括校验正确和校验错误的子传输块进行正确的排序和存储。对于传输正确的子传输数据块，存储其解码后的值；对于传输错误的子传输数据块存储其软解调后的值或者其软解码后的值。如果子传输数据块全部正确或者错误的子传输数据块已经到达最大重传次数，将全部子传输数据块组成一个独立数据块或者进行正确的排序后，组成一个独立数据块向高层发送；所述数据合并单元323，与解码和校验单元321和排序存储处理单元322相连，用于将重传的子传输数据块与存储的相应的错误子传输数据块进行合并，再进行解码和校验。The receiver data
所述系统中各个装置及单元的功能与本发明所述方法各个步骤的实现过程相同，具体请参考前述，在此不在详细的描述。The functions of each device and unit in the system are the same as the implementation process of each step of the method of the present invention, please refer to the foregoing for details, and will not be described in detail here.
在请参考图8A和8B，分别为本发明的一实施例，在该实施例中以下行传送数据为例来说明(即数据发送端为网络侧；数据接收端为用户侧)Please refer to FIG. 8A and 8B, which are respectively an embodiment of the present invention. In this embodiment, the following data transmission is taken as an example (that is, the data sending end is the network side; the data receiving end is the user side)
如图8A所示，网络侧的高层下发了一个数据块(密网格)，该数据块中包括相应的高层header(疏网格)信息，物理层根据编码器的最优处理能力或者单位传输单元能够承载的信息量进行判断之后，将所述数据块切割成4个子数据块(即条纹的4部分，自上而下分别称作0，1，2，3)分别添加各自的检错码进行调制编码，经由规定的单位传输单元进行传输。对于规定的单位传输单元，比如这4个子传输数据块可以依次占用某个传输时间单元中的4个频域子带，或占用同一频带的连续4个传输时间单元，或者占用两个连续传输时间单元的2个频域子带等；As shown in Figure 8A, the high layer on the network side sends a data block (dense grid), which includes the corresponding high layer header (sparse grid) information. After judging the amount of information that the transmission unit can carry, the data block is cut into 4 sub-data blocks (that is, the 4 parts of the stripe, which are called 0, 1, 2, and 3 from top to bottom) and add their own error detection The code is modulated and coded, and transmitted via a specified unit transmission unit. For a specified unit transmission unit, for example, these 4 sub-transmission data blocks can sequentially occupy 4 frequency domain sub-bands in a certain transmission time unit, or occupy 4 consecutive transmission time units of the same frequency band, or occupy two consecutive transmission times 2 frequency domain subbands of the unit, etc.;
用户侧的物理层分别对这4个子传输数据块进行解码和校验，假如实施例中初次传输1，3子传输数据块传输正确；0，2子传输数据块发生错误，则对应的反馈信息ACK/NAK为“NANA”，按照物理层预先约定的顺序发送到网络侧，用户侧的物理层分别排序存储这4个子包。The physical layer on the user side decodes and checks these 4 sub-transmission data blocks respectively. If the transmission of sub-transmission data blocks 1 and 3 is correct for the first time in the embodiment; if an error occurs in sub-transmission data blocks 0 and 2, the corresponding feedback information The ACK/NAK is "NANA", which is sent to the network side according to the pre-agreed order of the physical layer, and the physical layer of the user side sorts and stores these 4 subpackets respectively.
在如图8B所示，网络侧根据反馈结果中包含的NACK，判断有数据需要重传，进行调度分配相应的物理资源，将ACK/NAK的反馈结果交给本端的物理层，所述物理层根据反馈结果确定重传0，2子传输数据块，并对0，2子传输数据块进行合适的编码和调制，可以基于高层下发的根据当前物理信道状况选择的调制编码格式或者预先设定的调制编码格式，即可以采用和上次传输相同或者不同的调制和编码格式等。然后在分配的相应的单位传输单元上发送重传数据；由于本次重传占用的物理资源比初传少，节省的物理资源可以用来调度其他用户的信息。As shown in Figure 8B, the network side judges that there is data that needs to be retransmitted according to the NACK contained in the feedback result, schedules and allocates corresponding physical resources, and delivers the ACK/NAK feedback result to the physical layer of the local end, and the physical layer According to the feedback result, determine the retransmission of 0, 2 sub-transmission data blocks, and perform appropriate coding and modulation on 0, 2 sub-transmission data blocks, which can be based on the modulation and coding format selected by the high layer according to the current physical channel conditions or pre-set Modulation and coding format, that is, the same or different modulation and coding format as the previous transmission can be used. Then the retransmission data is sent on the allocated corresponding unit transmission unit; since the retransmission occupies less physical resources than the initial transmission, the saved physical resources can be used to schedule information of other users.
用户侧的物理层将新接收到的重传子传输数据块分别与原来存储的错误的子传输数据块对应合并，所述合并的方式可以采用最大比合并、等增益合并等各种合并方式，本发明并不限于所公开的合并方式。重新进行校验，本实施例中，第二次传输中，假如0子传输数据块重传合并后正确，而2子传输数据块重传后仍然错误，类似地，则对应反馈的ACK/NAK为“AN”，按照物理层预先约定的顺序发送到网络侧，用户侧的物理层分别排序存储这两个子传输数据块。The physical layer on the user side combines the newly received retransmitted sub-transmission data blocks with the original stored erroneous sub-transmission data blocks respectively. The invention is not limited to the disclosed combinations. Check again. In this embodiment, in the second transmission, if 0 sub-transmission data blocks are retransmitted and combined correctly, and 2 sub-transmission data blocks are still wrong after retransmission, similarly, the corresponding feedback ACK/NAK It is "AN", and sent to the network side according to the pre-agreed order of the physical layer, and the physical layer of the user side sorts and stores the two sub-transmission data blocks respectively.
同上，网络侧组织错误子数据块的重传，直到各个子数据块全部正确或者达到最大重传次数后用户侧的物理层将所有数据块(包括错误的)、进行正确排序，组合成一个独立数据块，传递给高层，如果仍有错误留待高层或者更高层的重传来完成。As above, the network side organizes retransmission of wrong sub-data blocks until all sub-data blocks are correct or reaches the maximum number of retransmissions, and the physical layer on the user side sorts all data blocks (including erroneous ones) correctly and combines them into an independent The data block is passed to the upper layer. If there is still an error, the retransmission of the upper layer or a higher layer is completed.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.
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