CN104283646B - A kind of method of definite transmission mode feedback parameter - Google Patents
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Abstract
一种确定传输模式反馈参数的方法，所述方法包括：依据HARQ‑ACK信息比特数OACK和绑定扰码序列构造状态序列；根据PUSCH信道的调制阶数Qm处理接收到的ACK/NACK软比特序列得到ACK/NACK编码信息序列；将状态序列与ACK/NACK编码信息序列进行相关检测得到相关值；依据最大相关值对应状态序列的生成扰码的索引值计算得到ACK/NACK绑定传输模式中反馈参数Nbundling。应用本发明实施例后，确定反馈参数的过程简单且时延较短。
A method for determining transmission mode feedback parameters, said method comprising: constructing a state sequence according to the number of HARQ-ACK information bits O ACK and a binding scrambling code sequence; processing received ACK / NACK according to the modulation order Q of the PUSCH channel The soft bit sequence is used to obtain the ACK/NACK coded information sequence; the state sequence is correlated with the ACK/NACK coded information sequence to obtain the correlation value; the ACK/NACK bundled transmission is obtained by calculating the index value of the generated scrambling code corresponding to the state sequence with the maximum correlation value Feedback parameter N bundling in mode. After applying the embodiment of the present invention, the process of determining the feedback parameter is simple and the time delay is short.
Description
技术领域technical field
本申请涉及通信技术领域，更具体地，涉及一种确定传输模式反馈参数的方法。The present application relates to the technical field of communications, and more specifically, to a method for determining a transmission mode feedback parameter.
背景技术Background technique
在TD-LTE系统中，ACK/NACK的传输模式分为ACK/NACK绑定（bundling）和ACK/NACK复用（multiplexing）。对于TD-LTE系统中的ACK/NACK绑定模式，UE需要传输每个码字的下行子帧中接收到的PDSCH，以及指示下行半静态调度释放的PDCCH的ACK/NACK反馈做与运算。UE需要检测是否丢失下行分配，且当UE上行采用PUSCH传输时，需要知道Nbundling参数的值，以确定UE反馈的ACK/NACK信息。如果Nbundling盲检出错，基站可能会判断UE处于DTX状态，这样会影响PUSCH的解调性能，同时也会干扰基站对PDCCH信道质量的判断。In the TD-LTE system, the transmission mode of ACK/NACK is divided into ACK/NACK bundling (bundling) and ACK/NACK multiplexing (multiplexing). For the ACK/NACK bundling mode in the TD-LTE system, the UE needs to transmit the PDSCH received in the downlink subframe of each codeword, and the ACK/NACK feedback of the PDCCH indicating the release of the downlink semi-persistent scheduling for AND operation. The UE needs to detect whether the downlink allocation is lost, and when the UE uses PUSCH for uplink transmission, it needs to know the value of the N bundling parameter to determine the ACK/NACK information fed back by the UE. If the N bundling blind detection is wrong, the base station may judge that the UE is in the DTX state, which will affect the demodulation performance of the PUSCH, and will also interfere with the base station's judgment of the PDCCH channel quality.
相关协议规定，TD-LTE系统中如果ACK/NACK模式为bundling，则在表1中选择一个绑定扰码序列，对编码后的ACK/NACK序列进行加扰，生成加扰比特序列i＝(Nbundled-1)mod4。The relevant agreement stipulates that if the ACK/NACK mode is bundling in the TD-LTE system, select a bundled scrambling code sequence in Table 1 , for the encoded ACK/NACK sequence Perform scrambling to generate a scrambled bit sequence i=(N bundled -1) mod4.
表1Table 1
基站在接收到PUSCH信道时，并不知道UE接收到DCI的情况，因此需要确定UE使用的Nbundling，才能对接收到的ACK/NACK进行解扰。通过确定的Nbundling，基站可以判断UE是否丢失DCI，以及丢失DCI数目，从而可以准确解码ACK/NACK信息，判断UE是否处于DTX状态，以及PDCCH的信道状况，因此，如何确定Nbundling对保障TD-LTE的系统性能非常重要。When the base station receives the PUSCH channel, it does not know the situation of the DCI received by the UE, so it needs to determine the N bundling used by the UE in order to descramble the received ACK/NACK. Through the determined N bundling , the base station can determine whether the UE has lost DCI and the number of lost DCI, so that it can accurately decode the ACK/NACK information, determine whether the UE is in the DTX state, and the channel status of the PDCCH. Therefore, how to determine the N bundling is important for ensuring TD -The system performance of LTE is very important.
基站在接收到PUSCH信道之后，通过信道估计、均衡和解调过程，可以得到PUSCH信道上承载的数据和上行控制信（UCI）的软比特，再利用信道解交织可以得到ACK/NACK的软比特序列。由于基站并不知道UE使用的Nbundling，因此只能通过轮询盲检的方式确定基站使用的Nbundling。After receiving the PUSCH channel, the base station can obtain the data carried on the PUSCH channel and the soft bits of the uplink control signal (UCI) through the process of channel estimation, equalization and demodulation, and then use channel deinterleaving to obtain the soft bits of ACK/NACK sequence. Since the base station does not know the N bundling used by the UE, it can only determine the N bundling used by the base station through round-robin blind detection.
基站得到Nbundling的盲检过程主要通过ACK/NACK信息检测、ACK/NACK序列重构和相关判决三个步骤，对可能的Nbundling进行轮询，确定Nbundling，这种方法复杂度较高，处理时延较长。The blind detection process of the base station to obtain the N bundling is mainly through three steps of ACK/NACK information detection, ACK/NACK sequence reconstruction and related judgment, polling the possible N bundling , and determining the N bundling , this method has high complexity, The processing delay is long.
发明内容Contents of the invention
本发明实施例提出一种确定传输模式反馈参数的方法，确定反馈参数的过程简单且时延较短。The embodiment of the present invention proposes a method for determining the feedback parameter of the transmission mode, the process of determining the feedback parameter is simple and the time delay is short.
本发明实施例的技术方案如下：The technical scheme of the embodiment of the present invention is as follows:
一种确定传输模式反馈参数的方法，所述方法包括：A method of determining transmission mode feedback parameters, the method comprising:
依据HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列；Construct a state sequence according to the number of HARQ-ACK information bits O ACK and the binding scrambling code sequence;
根据PUSCH信道的调制阶数Qm处理接收到的ACK/NACK软比特序列得到ACK/NACK编码信息序列；Process the received ACK/NACK soft bit sequence according to the modulation order Q m of the PUSCH channel to obtain the ACK/NACK coded information sequence;
将状态序列与ACK/NACK编码信息序列进行相关检测得到相关值；Correlation detection is performed between the state sequence and the ACK/NACK coded information sequence to obtain a correlation value;
依据最大相关值对应状态序列的生成扰码的索引值计算得到ACK/NACK绑定传输模式中反馈参数Nbundling。The feedback parameter N bundling in the ACK/NACK bundling transmission mode is calculated according to the index value of the generated scrambling code of the state sequence corresponding to the maximum correlation value.
所述依据HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列包括：The state sequence constructed according to the number of HARQ-ACK information bits O ACK and the binding scrambling code sequence includes:
OACK=1时，由绑定扰码序列根据对应关系构造状态序列；O When ACK = 1, the state sequence is constructed by the binding scrambling code sequence according to the corresponding relationship;
所述对应关系包括：当绑定加扰序列中的加扰序列值为1时，状态序列中的状态序列值为-1；当所述加扰序列值为0时，所述状态序列值为1。The corresponding relationship includes: when the value of the scrambling sequence in the binding scrambling sequence is 1, the value of the state sequence in the state sequence is -1; when the value of the scrambling sequence is 0, the value of the state sequence is 1.
所述依据HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列包括：The state sequence constructed according to the number of HARQ-ACK information bits O ACK and the binding scrambling code sequence includes:
OACK=2时，将绑定扰码序列的每一位扩展为三位后根据对应关系得到状态序列；When O ACK = 2, expand each bit of the bound scrambling code sequence to three bits and then obtain the state sequence according to the corresponding relationship;
所述对应关系包括：当扩展后的绑定扰码序列中的加扰序列值为1时，状态序列中的状态序列值为-1；当所述加扰序列值为0时，所述状态序列值为1。The corresponding relationship includes: when the scrambling sequence value in the extended bound scrambling code sequence is 1, the state sequence value in the state sequence is -1; when the scrambling sequence value is 0, the state The sequence value is 1.
所述由Qm处理接收到的ACK/NACK软比特得到ACK/NACK编码信息序列包括：根据Qm在接收到的ACK/NACK软比特中删除位置填充比特，得到ACK/NACK编码信息序列。The processing of the received ACK/NACK soft bits by Q m to obtain the ACK/NACK coded information sequence includes: deleting position filling bits in the received ACK/NACK soft bits according to Q m to obtain the ACK/NACK coded information sequence.
所述状态序列与ACK/NACK编码信息序列进行相关检测得到相关值包括：Correlation detection between the state sequence and the ACK/NACK coded information sequence to obtain a correlation value includes:
将状态序列的长度扩展为与ACK/NACK编码信息序列长度相同的序列；Extend the length of the state sequence to a sequence with the same length as the ACK/NACK coded information sequence;
扩展后的状态序列与ACK/NACK编码信息序列进行相关检测得到相关值。Correlation detection is performed between the extended state sequence and the ACK/NACK coded information sequence to obtain a correlation value.
所述将状态序列的长度扩展为与ACK/NACK编码信息序列长度相同的序列包括：Extending the length of the state sequence to a sequence with the same length as the ACK/NACK coded information sequence includes:
将状态序列至少重复一次，重复后的状态序列长度大于ACK/NACK编码信息序列长度；Repeat the state sequence at least once, and the length of the repeated state sequence is greater than the length of the ACK/NACK coded information sequence;
在重复后的状态序列中从头截取与ACK/NACK编码信息序列长度相同的序列作为扩展后的状态序列。In the repeated state sequence, the sequence with the same length as the ACK/NACK coded information sequence is intercepted from the head as the extended state sequence.
所述扩展后的状态序列与ACK/NACK编码信息序列进行相关检测得到相关值：扩展后的状态序列与ACK/NACK编码信息序列分别相乘后再叠加，然后取绝对值得到相关值。Correlation detection is performed between the extended state sequence and the ACK/NACK coded information sequence to obtain a correlation value: the extended state sequence and the ACK/NACK coded information sequence are respectively multiplied and then superimposed, and then the absolute value is taken to obtain a correlation value.
从上述技术方案中可以看出，在本发明实施例中依据HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列；根据PUSCH信道的调制阶数Qm处理接收到的ACK/NACK软比特序列得到ACK/NACK编码信息序列；将状态序列与ACK/NACK编码信息序列进行相关检测得到相关值；依据最大相关值对应状态序列的生成扰码的索引值计算得到ACK/NACK绑定传输模式中反馈参数Nbundling。由于在整个确定反馈参数的过程中不需要轮询，而是选取最大相关值直接计算获得反馈参数，因此检测过程复杂度较低且时延较短。As can be seen from the above technical solutions, in the embodiment of the present invention, the state sequence is constructed according to the number of HARQ-ACK information bits O ACK and the bound scrambling code sequence; the received ACK / NACK is processed according to the modulation order Q of the PUSCH channel The soft bit sequence is used to obtain the ACK/NACK coded information sequence; the state sequence is correlated with the ACK/NACK coded information sequence to obtain the correlation value; the ACK/NACK bundled transmission is obtained by calculating the index value of the generated scrambling code corresponding to the state sequence with the maximum correlation value Feedback parameter N bundling in mode. Since no polling is required during the entire process of determining the feedback parameters, but the maximum correlation value is selected to directly calculate the feedback parameters, so the detection process has low complexity and short delay.
附图说明Description of drawings
图1为确定传输模式反馈参数的方法流程示意图。Fig. 1 is a schematic flowchart of a method for determining a transmission mode feedback parameter.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点表达得更加清楚明白，下面结合附图及具体实施例对本发明再作进一步详细的说明。In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
在本发明实施例中，不需要对接收到的ACK/NACK软比特序列进行检测和重构。基站根据已知信息，利用OACK和绑定扰码序列构造状态序列，然后将状态序列和处理后的ACK/NACK软比特序列进行相关检测，即可确定Nbundling的数值。采用该技术方案确定Nbundling，可靠性高并且实现复杂度低，有效地降低了设备的复杂度和处理时延。In the embodiment of the present invention, there is no need to detect and reconstruct the received ACK/NACK soft bit sequence. Based on the known information, the base station constructs a state sequence using the O ACK and the bundling scrambling code sequence, and then correlates the state sequence with the processed ACK/NACK soft bit sequence to determine the value of N bundling . Using this technical solution to determine N bundling has high reliability and low implementation complexity, and effectively reduces device complexity and processing delay.
参见附图1是确定传输模式反馈参数的方法流程示意图，具体包括以下步骤：Referring to accompanying drawing 1, it is a schematic flowchart of a method for determining a transmission mode feedback parameter, which specifically includes the following steps:
101、依据HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列。101. Construct a state sequence according to the number of HARQ-ACK information bits O ACK and the bound scrambling code sequence.
根据已知的HARQ-ACK信息比特数OACK和绑定扰码序列构造状态序列。绑定扰码序列即表1中相应的序列。According to the known HARQ-ACK information bit number O ACK and binding scrambling code sequence Construct a sequence of states. The bound scrambling code sequence is the corresponding sequence in Table 1.
当OACK=1时，根据相关协议对编码后进行加扰的比特来说，每1个编码后的比特使用相同的扰码进行模二相加，因此加扰后的序列的取值与绑定加扰序列的值一一对应相关，根据绑定加扰序列可直接得到状态序列。即:当绑定加扰序列中的加扰序列值为1时，状态序列中的状态序列值为-1；当所述加扰序列值为0时，所述状态序列值为1。具体地：当OACK=1时，状态序列μ为：When O ACK = 1, according to the relevant protocol, for the encoded scrambled bits, each encoded bit uses the same scrambling code for modulo two addition, so the value of the scrambled sequence is related to the binding The value of the fixed scrambling sequence is one-to-one, and the state sequence can be directly obtained according to the bound scrambling sequence. That is: when the scrambling sequence value in the binding scrambling sequence is 1, the state sequence value in the state sequence is -1; when the scrambling sequence value is 0, the state sequence value is 1. Specifically: when O ACK =1, the state sequence μ is:
其中，sc代表扰码序列。Wherein, sc represents a scrambling code sequence.
当OACK=2时，根据相关协议对编码后进行加扰的比特来说，每3个编码后的比特使用相同的扰码进行模二相加，因此每3个加扰后的序列的取值与绑定加扰序列的值对应相关。首先根据绑定加扰序列进行扩展，将绑定加扰序列的每一位扩展成三位后，按照以下的对应关系可得到状态序列。当扩展后的绑定扰码序列中的加扰序列值为1时，状态序列中的状态序列值为-1；当所述加扰序列值为0时，所述状态序列值为1。具体地，当OACK=2时，状态序列μ为：When O ACK = 2, according to the relevant protocol, for the encoded scrambled bits, every 3 encoded bits use the same scrambling code for modulo two addition, so the fetching of every 3 scrambled sequences The value corresponds to the value of the bound scrambling sequence. First, expand according to the binding scrambling sequence, after expanding each bit of the binding scrambling sequence into three bits, the state sequence can be obtained according to the following corresponding relationship. When the scrambling sequence value in the extended bound scrambling code sequence is 1, the state sequence value in the state sequence is -1; when the scrambling sequence value is 0, the state sequence value is 1. Specifically, when O ACK =2, the state sequence μ is:
102、根据PUSCH信道的调制阶数Qm处理接收到的软比特得到ACK/NACK编码信息序列。102. Process the received soft bits according to the modulation order Q m of the PUSCH channel to obtain an ACK/NACK coded information sequence.
根据PUSCH信道的调制阶数Qm，处理接收到的软比特即删除位置填充比特x，得到ACK/NACK编码信息序列具体操作如下：Process the received soft bits according to the modulation order Q m of the PUSCH channel That is, delete the position padding bit x to obtain the ACK/NACK coded information sequence The specific operation is as follows:
1）、编码方式为QPSK，即Qm=2时，无x填充比特， 1) The encoding method is QPSK, that is, when Q m =2, there is no x padding bit,
2）、编码方式为16COM，即Qm=4时，根据表2（1比特HARQ-ACK编码）和表3（2比特HARQ-ACK）可知，每4比特的后2位比特为x占位比特，将序列按每4位进行分割，删除后2位，得到序列 2) The encoding method is 16COM, that is, when Q m = 4, according to Table 2 (1-bit HARQ-ACK encoding) and Table 3 (2-bit HARQ-ACK), it can be seen that the last 2 bits of every 4 bits are occupied by x bit, will The sequence is divided by every 4 bits, and the last 2 bits are deleted to obtain the sequence
表2Table 2
表3table 3
3）、编码方式为64COM，即Qm=6时，根据表2和表3，每6比特的后4位比特为x填充比特，将序列按每6位进行分割，删除后4位，得到序列 3) The encoding method is 64COM, that is, when Q m =6, according to Table 2 and Table 3, the last 4 bits of every 6 bits are x padding bits, and the The sequence is divided by every 6 bits, and the last 4 bits are deleted to obtain the sequence
103、将状态序列与ACK/NACK编码信息序列进行相关检测得到相关值。103. Perform correlation detection on the state sequence and the ACK/NACK coded information sequence to obtain a correlation value.
首先将状态序列的长度扩展为与ACK/NACK编码信息序列长度相同的序列，这样做的目的在于长度相同的两个序列才能做相关运算。First, the length of the state sequence is extended to a sequence with the same length as the ACK/NACK coded information sequence. The purpose of this is that only two sequences with the same length can perform correlation operations.
然后，扩展后的状态序列与ACK/NACK编码信息序列进行相关检测得到相关值。Then, correlation detection is performed between the extended state sequence and the ACK/NACK coded information sequence to obtain a correlation value.
将状态序列至少重复一次，重复后的状态序列长度大于ACK/NACK编码信息序列长度；在重复后的状态序列中从头截取与ACK/NACK编码信息序列长度相同的序列作为扩展后的状态序列。Repeat the state sequence at least once, and the length of the repeated state sequence is greater than the length of the ACK/NACK coded information sequence; from the repeated state sequence, a sequence with the same length as the ACK/NACK coded information sequence is intercepted as the extended state sequence.
扩展后的状态序列与ACK/NACK编码信息序列分别相乘后再叠加，然后取绝对值得到相关值。The extended state sequence and the ACK/NACK coded information sequence are multiplied separately and then superimposed, and then the absolute value is taken to obtain the correlation value.
δ是相关值。 δ is the correlation value.
104、依据最大相关值对应状态序列的生成扰码的索引值计算得到ACK/NACK绑定传输模式中反馈参数Nbundling。104. Calculate and obtain the feedback parameter N bundling in the ACK/NACK bundling transmission mode according to the index value of the generated scrambling code of the state sequence corresponding to the maximum correlation value.
最大相关值对应的状态序列的生成扰码为ACK/NACK加扰的扰码。即根据生成扰码在表1中可以获知其对应的索引值A。基站根据现有技术中索引值与Nbundling的关系可以计算得到Nbundling。The generated scrambling code of the state sequence corresponding to the maximum correlation value is the scrambling code of ACK/NACK scrambling. That is, the corresponding index value A can be obtained from Table 1 according to the generated scrambling code. The base station can calculate N bundling according to the relationship between the index value and N bundling in the prior art.
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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| CN101801097A (en) * | 2010-01-08 | 2010-08-11 | 中兴通讯股份有限公司 | Method for indicating physical uplink shared channel scheduling information |
| CN101958777A (en) * | 2010-09-28 | 2011-01-26 | 中兴通讯股份有限公司 | Processing method and device for sending correct/error response messages |
| CN102684853A (en) * | 2012-04-17 | 2012-09-19 | 电信科学技术研究院 | Selection method and selection device for ACK (acknowledgement character) feedback mode |
| WO2012155753A1 (en) * | 2011-09-29 | 2012-11-22 | 中兴通讯股份有限公司 | Transmission method and device |
| CN102904698A (en) * | 2011-05-31 | 2013-01-30 | 北京三星通信技术研究有限公司 | Method for sending hybrid automatic repeat request-acknowledgement character (HARQ-ACK) feedback information |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801097A (en) * | 2010-01-08 | 2010-08-11 | 中兴通讯股份有限公司 | Method for indicating physical uplink shared channel scheduling information |
| CN101958777A (en) * | 2010-09-28 | 2011-01-26 | 中兴通讯股份有限公司 | Processing method and device for sending correct/error response messages |
| CN102904698A (en) * | 2011-05-31 | 2013-01-30 | 北京三星通信技术研究有限公司 | Method for sending hybrid automatic repeat request-acknowledgement character (HARQ-ACK) feedback information |
| WO2012155753A1 (en) * | 2011-09-29 | 2012-11-22 | 中兴通讯股份有限公司 | Transmission method and device |
| CN102684853A (en) * | 2012-04-17 | 2012-09-19 | 电信科学技术研究院 | Selection method and selection device for ACK (acknowledgement character) feedback mode |
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