CN1667993A - A method for controlling transmit frequency of status report - Google Patents

A method for controlling transmit frequency of status report Download PDF

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CN1667993A
CN1667993A CN 200410064316 CN200410064316A CN1667993A CN 1667993 A CN1667993 A CN 1667993A CN 200410064316 CN200410064316 CN 200410064316 CN 200410064316 A CN200410064316 A CN 200410064316A CN 1667993 A CN1667993 A CN 1667993A
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nack
status report
pdu
counter
transmission
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CN 200410064316
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CN100359842C (en
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杨学志
丁颖哲
许炳
曲秉玉
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华为技术有限公司
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Abstract

本发明公开了一种控制状态报告发送频率的方法,该方法为接收实体发送到发送实体、且包含NACK的状态报告设置发送条件;接收实体每次向发送实体发送包含NACK的状态报告之前,针对本状态报告考察范围内的每个没有被本接收实体正确接收的PDU,判断当前是否符合设定的NACK发送条件,如果不符合,则在状态报告中不包含该PDU的NACK;否则,允许在状态报告中包含针对该PDU的NACK。 The present invention discloses a method of controlling transmission frequency of a status report, which is sent to the transmitting entity and a receiving entity, a NACK status report and comprises setting transmission conditions; receiving entity prior to each transmission of the status report containing a NACK to the transmitting entity, for each is not received correctly according to the receiving entity PDU status report in this scope of the study, it is determined whether the current NACK transmission condition setting, and if not, the PDU is not included in the NACK status report; otherwise, allowing NACK status report contains for the PDU. 本发明解决了现有技术中会出现冗余PDU及状态报告传送的问题。 The invention solves the prior art problems occur and redundant PDU status report transmission. 本发明在不影响包含ACK的状态报告发送的前提下,限制了包含NACK的状态报告的发送,减少了冗余状态报告的发送,并进而减少了冗余重传PDU,提高了通信链路的利用率。 In the present invention, without affecting the status report sent contain the ACK, the transmission restriction status report containing NACK, reduce the transmission of redundant status report, thus reducing the redundant retransmission PDUs, improved communication link utilization.

Description

一种控制状态报告发送频率的方法 A method of controlling a status report transmission frequency

技术领域 FIELD

本发明涉及数据单元状态报告技术领域,更确切地说是涉及在无线通信系统的自动重传请求机制中控制状态报告发送频率的方法。 The present invention relates to data reporting unit BACKGROUND state, and more specifically relates to a method of controlling a status report at the ARQ mechanism for a wireless communication system transmission frequency.

背景技术 Background technique

通用移动通信系统(UMTS)是采用宽带码分多址(WCDMA)空中接口技术的第三代移动通信系统,通常也称作WCDMA系统。 Universal Mobile Telecommunications System (UMTS) employing Wideband Code Division Multiple Access (WCDMA) air interface technology of the third generation mobile communication systems, also commonly referred to WCDMA system.

WCDMA的无线接口分为物理层、数据链路层和网络层。 WCDMA radio interface is divided into a physical layer, a data link layer and a network layer. 数据链路层中的无线链路控制(RLC)支持透明模式(TM)、非确认模式(UM)和确认模式(AM)三种模式,实现分段、级联、填充、差错控制、流量控制、重复性检测等功能。 The data link layer is a radio link control (RLC) supports transparent mode ((TM)), unacknowledged mode (UM) and an acknowledged mode (AM) three modes, to achieve segmentation, concatenation, padding, error control, flow control , reproducible detection. 其中,RLC AM实体包括发送实体和接收实体,发送实体和接收实体对网络层发送来的数据单元进行处理,并将处理后的数据单元再发送给网络层。 Wherein, RLC AM entity includes a transmitting and receiving entities, the sending entity and a receiving entity for the data units transmitted to the network layer for processing and re-transmitting the data unit to the network layer processed. 由发送实体和接收实体组成的RLC AM实体的功能模型参见图1,对应的处理过程则参见图2。 Referring to FIG functional model by the RLC AM entity transmitting and receiving entities consisting of 1, corresponding to the processing procedure Referring to FIG. 其中,发送实体通过以下步骤进行数据单元处理:步骤201、发送实体在收到网络层传送来的RLC业务数据单元(SDU)时,首先对该协议处理单元(PDU)进行分段/级联处理。 Wherein the transmitting entity a data unit processed by the following steps: Step 201, when receiving the sending entity RLC service data unit (SDU) transmitted to the network layer, is first segmentation / concatenation processing of the protocol processing unit (PDU) .

根据实际需要,发送实体还可能需要对分段/级联处理后的RLC PDU进行填充处理。 According to actual needs, the sending entity may also be needed for RLC PDU segmentation / concatenation processing is performed after the filling process.

步骤202、组装确认模式数据(AMD)PDU,并将组装后的AMD PDU发送给发送缓冲器。 Step 202, the assembly acknowledged mode data (AMD) PDU, and transmits the AMD PDU is assembled to the transmission buffer.

步骤203、发送实体中的发送缓冲器对自身保存的AMD PDU进行调度。 Step 203, the transmission entity transmission buffer in an AMD PDU stored in itself scheduling.

步骤204、调度到的PDU如果可以发送,则根据网络层配置的规则设置查询比特,然后将处理后的AMD PDU提交给底层发送到接收实体。 Step 204, if a PDU scheduled to be transmitted, the bits according to rules set query the network layer configuration, and then treated AMD PDU transmitted to the receiving entity to submit the bottom.

在步骤204中,对于新组装的AMD PDU来说,还要设置序列号域,之后对AMD PDU进行加密。 In step 204, the new assembly of an AMD PDU, a sequence number field also provided, then to encrypt the AMD PDU.

接收实体通过以下步骤进行数据单元处理:步骤205、接收实体对正确接收到的AMD PDU进行解密,并将解密得到的数据放到接收缓冲器。 Receiving a data unit processing entity by the following steps: Step 205, receiving entity correctly received AMD PDU is decrypted, and the decrypted data into the receive buffer.

步骤206、对该AMD PDU进行解析,以判断能否重组出RLC SDU,如果能够重组出完整的RLC SDU,则进行重组操作,并将重组得到的RLCSDU提交到高层。 Step 206, the AMD PDU is parsed to determine whether the recombinant RLC SDU, if capable of recombining a complete RLC SDU, restructuring operation is performed, and the resulting recombinant RLCSDU submitted to high.

在上述步骤206中,接收实体在对解密后的AMD PDU进行解析之前,还需要根据AMD PDU中查询比特的值,以及网络层在接收实体中配置的状态报告机制,判断当前AMD PDU的传输是否准确,也即,判断是否需要向发送实体发送用于重传数据的状态报告,如果需要,则接收实体组装相应的状态报告,并将该状态报告发送到底层。 In step 206, the receiving entity prior to AMD PDU decrypted analyzing, also need to AMD PDU query value of a bit, and the status reporting mechanism for the network layer is arranged in the receiving entity determines transmission of the current of the AMD PDU if accurate, i.e., it determines whether to send a status report for retransmission to the transmitting entity data, if necessary, the receiving entity corresponding status report is assembled, and sends the status report to the bottom layer. 底层则将该状态报告发送给发送实体中的重传缓冲器,重传缓冲器则根据收到的状态报告缓存需要重传的AMD PDU。 The bottom layer is transmitted to the retransmission buffer status report transmission entity, retransmission buffer cache is reported to be retransmitted in accordance with the state of the received AMD PDU. 在这种情况下,上述步骤203中发送缓冲器调度的AMD PDU不但有新组装的AMD PDU,还包括保存在重传缓冲器中等待重传的AMDPDU。 In this case, the above-described step 203 AMD PDU scheduled transmission buffer is not only a newly assembled AMD PDU, further comprising saving waiting for retransmission in the retransmission buffer AMDPDU. 这种重传数据单元的机制称为自动重传请求(ARQ)机制。 This retransmission mechanism for data units referred to as automatic repeat request (ARQ) mechanism.

接收实体所组装的状态报告中包含的是肯定确认(ACK)信息和否定确认(NACK)信息,用于重传数据的状态报告中包含NACK,用于确定AMDPDU被正确接收的状态报告中则包含ACK。 The receiving entity comprising assembled state report is affirmative acknowledgment (ACK) message and a negative acknowledgment (NACK) information, the status report for retransmission of data containing NACK, for determining a state AMDPDU received correctly report contains ACK. 在上述从发送实体到接收实体的整个通信过程中,发送实体如果收到包含NACK的状态报告,也即用于重传数据的状态报告,则重传传输出现错误或被丢弃的PDU,以保证数据单元的正确传输。 In the above-described status report communication process from a transmitting entity to a receiving entity, if the transmitting entity receives a NACK status report contains, i.e. for retransmission of data, a transmission error is retransmitted PDUs or is discarded, to ensure correct transmission of data units. 当然,发送实体如果收到包含ACK的状态报告,则可以确认相应的PDU被正确地传输了。 Of course, if the transmitting entity receives a status report contains an ACK, it was confirmed that the corresponding PDU is transmitted properly.

但是,目前通常会出现接收实体向发送实体发送多次针对同一PDU、且包含的确认信息为NACK的状态报告,而发送实体多次向接收实体重传同一个PDU。 However, there usually occurs receiving entity sends an acknowledgment message multiple times for the same PDU, and includes the sending entity NACK status report, and repeatedly sending entity to the receiving entity retransmit the same PDU. 也就是说,目前通常会造成系统需要传输很多的冗余数据,而这显然浪费了数据传输资源,并且接收实体和发送实体都要在传输冗余数据上浪费较多的时间。 In other words, the current system often results in the need to transfer a lot of redundant data, which is clearly a waste of resources, data transmission, and the receiving entity and the sending entity must waste more time on the transmission of redundant data.

另外,由于发送实体在将PDU发送给接收实体之后,还要等待接收实体返回状态报告,如果接收实体返回的状态报告中包含的为NACK,则该发送实体还应该向接收实体再次发送该PDU。 Further, since the transmitting entity to the receiving entity after the PDU transmission, receiving entity we have to wait for a status report, if the entity receiving the status report is contained in the returned NACK, the transmitting entity which should again transmits the PDU to the receiving entity. 发送实体在整个过程中的等待时间为时延。 Sending entity waiting time in the overall process is the delay. 如果发送实体收到接收实体返回的多个包含NACK的状态报告,则发送实体在从第一次发送PDU到最后一次重传PDU的这段时间都为针对该PDU的时延,显然,这段时延的时间较长,占用了发送实体的资源,并且也会对发送实体的工作造成一定的影响。 If the sending entity receives a plurality of receiving entity status report containing a NACK, the transmitting entity transmits a PDU at this time from the first to the last PDU in the retransmission delay for the PDU are, obviously, this longer delay, taking up resources sending entity, and also cause some impact on the work of the sending entity. 现有技术目前也没有解决这个问题。 There is also no prior art to solve this problem.

上述问题不仅是出现在WCDMA系统的ARQ机制中,也出现在时分同步码分多址(TD-SCDMA)系统和CDMA2000的ARQ机制中。 The above-described problem is not only found in ARQ mechanism WCDMA system, also appears in the ARQ mechanism TD-SCDMA (TD-SCDMA) system and CDMA2000 in. 对于WCDMA和TD-SCDMA系统来说,ARQ机制是在RLC协议的确认模式(AM)中;对于CDMA2000系统来说,ARQ机制则是在链路接入控制(LAC)协议的ARQ子层中。 For WCDMA and TD-SCDMA systems, ARQ mechanism in the RLC protocol acknowledged mode (AM) of; for CDMA2000 systems, ARQ mechanism is ARQ sublayer Link Access Control (LAC) protocol.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供一种控制状态报告发送频率的方法,以避免系统传送冗余的状态报告及数据单元。 In view of this, the main object of the present invention is to provide a method of controlling transmission frequency of a status report, status report and to avoid transmitting redundant data in the system unit.

为达到以上目的,本发明的技术方案是这样实现的:一种报告数据单元状态的方法,适用于包括发送实体和接收实体的通信系统,且发送实体与接收实体之间采用自动重传机制进行通信,该方法包括以下步骤:a.为每个被检测出没有正确接收的协议数据单元PDU设定否定确认NACK发送条件;b.接收实体每次向发送实体发送状态报告之前,针对本状态报告考察范围内的每个没有被本接收实体正确接收的PDU,判断当前是否符合为该PDU设定的NACK发送条件,如果不符合,则在状态报告中不包含该PDU的NACK;否则,允许在状态报告中包含该PDU的NACK;c.接收实体将该状态报告发送给发送实体。 To achieve the above object, the technical solution of the present invention is implemented as follows: A method for reporting status of a data unit for a communication system comprising a transmitting entity and a receiving entity, and transmitting an automatic retransmission mechanism between the entity and a receiving entity communication, the method comprising the steps of:.. a protocol data unit is detected for each received PDU is not correctly set to a negative acknowledgment NACK transmission conditions; B each receiving entity to the transmitting entity transmits a status report before the status report for the present each is not received correctly according to the receiving entity PDU explored range, it is determined whether the current NACK transmission condition setting for the PDU, if not, the PDU is not included in the NACK status report; otherwise, allowing NACK status report contained in the PDU; C the receiving entity to the transmitting entity transmits a status report.

所述步骤a中,所述发送条件设定为:首先判断当前是否为针对PDU第一次发送NACK状态报告,如果是,则符合NACK发送条件;否则,进一步判断是否存在与该PDU对应、且处于正常工作状态的NACK定时装置,如果存在,则不符合NACK发送条件,否则,符合NACK发送条件。 Said step a, the transmission conditions are set as follows: First, determine whether the current for the first transmission for NACK status report PDUs, if so, in line with NACK transmission conditions; otherwise, further determining whether there is a corresponding to the PDUs, and NACK timing means in a normal working condition, if present, is not NACK transmission condition is met, otherwise, NACK transmission meet the conditions.

所述步骤c可以进一步包括:接收实体分别初始化状态报告中的每个NACK对应PDU的NACK发送条件。 Said step c further comprising: receiving entity NACK transmission conditions NACK status report corresponding to each PDU, respectively initialization.

步骤c中,所述初始化NACK发送条件为:如果当前存在与所述PDU对应的NACK定时装置,则直接启动该定时装置;否则,为该PDU设定一个NACK定时装置,并启动该定时装置。 In step c, the initialization NACK transmission conditions: If NACK corresponding to the timing means and the PDU currently exist, directly activate the timing device; otherwise, timing means for setting a NACK PDU, and starts the timing means.

所述步骤a中,所述为每个被检测出没有正确接收的PDU设定的NACK发送条件为同一个NACK发送条件;步骤a中,所述NACK发送条件设定为:判断是否存在处于正常工作状态的NACK定时装置,如果存在,则不符合NACK发送条件;否则,符合NACK发送条件;所述步骤c进一步包括:初始化NACK发送条件;所述初始化NACK发送条件为:如果当前存在所述NACK定时装置,则直接启动该定时装置;否则,设定一个NACK定时装置并启动。 Said step a, the NACK transmission for the same conditions for each detected NACK transmission condition is not set correctly received PDU; step a, the NACK transmission conditions are set to: determine whether there is in the normal NACK operating state timing means, if present, is not NACK transmission condition is met; otherwise, consistent with NACK transmission condition; step c further comprising: initializing NACK transmission conditions; NACK transmission conditions for the initialization: if the NACK currently exists timing means, the timing means starts directly; otherwise, set a NACK and start the timing means.

所述NACK定时装置为NACK定时器;步骤a中,所述NACK定时装置处于正常工作状态为:NACK定时器已经启动且尚未超时。 The NACK is NACK timer timing means; step a, the NACK timing means in a normal working state: NACK timer has been started and has not timed out.

所述NACK定时装置为计数器;步骤a中,所述NACK定时装置处于正常工作状态为:计数器处于计数状态。 The NACK timing for the counter means; step a, the NACK timing means in a normal working state: the state of the counter is counting.

该方法可以进一步包括:设置计数器计数范围的上限和下限,设置计数器的初始值为计数范围的上限,且将计数器设置为:每隔一定的时间间隔,计数器将当前的计数值减一;步骤a中,所述计数器处于计数状态为:计数器当前数值大于计数范围的下限;步骤c中,所述初始化NACK发送条件进一步包括:将计数器的初始值设置为计数范围的上限。 The method may further comprise: an upper limit value of the initial counter count range setting upper and lower limits of the range, setting the counter, and the counter is set to: every certain time interval, the counter counts down by a current; a step , the count state of the counter is: the current counter value is greater than the lower limit count range; step c, the initialization condition NACK transmission further comprising: setting the initial value of the counter upper limit count range.

所述每隔一定的时间间隔,计数器将当前的计数值减一为:每收到媒介接入控制MAC发送来的MAC状态指示原语MAC_Status_Ind一次,计数器将当前的计数值减一。 Every said certain time interval, the current count value of the counter decrements to: receive a medium access control (MAC) for each MAC status indication primitive transmitted MAC_Status_Ind once, the current count value of the counter by one.

该方法还可以进一步包括:设置计数器计数范围的上限和下限,设置计数器的初始值为计数范围的下限,且将计数器设置为:每隔一定的时间间隔,计数器将当前的计数值加一;步骤a中,所述计数器处于计数状态为:计数器当前数值小于计数器计数范围的上限;步骤c中,所述初始化NACK发送条件进一步包括:将计数器的初始值设置为计数范围的下限。 The method may further comprise: a lower limit value of the initial counter count range setting upper and lower limits of the range, setting the counter, and the counter is set to: every certain time intervals, the current counter a count value; Step a, the count state of the counter is: the current value of the counter is smaller than the upper limit of the range counter; step c, the initialization condition NACK transmission further comprising: setting the initial value of the counter as a lower limit count range.

所述每隔一定的时间间隔,计数器将当前的计数值加一为:每收到MAC发送来的MAC_Status_Ind一次,计数器将当前的计数值加一。 Every said certain time interval, the current counter count value to a: MAC_Status_Ind MAC receive each transmitted once, the current counter a count value.

所述自动重传请求机制可以位于宽带码分多址WCDMA或时分同步码分多址TD-SCDMA系统中无线链路控制RLC协议的确认模式AM。 The automatic retransmission request mechanism may be located in an acknowledged mode AM WCDMA Wideband Code Division Multiple Access TD-SCDMA or TD-SCDMA system radio link control RLC protocol.

所述自动重传请求机制还可以位于CDMA2000系统中链路接入控制LAC协议的自动重传请求ARQ子层。 The automatic retransmission request mechanism may also be located in a CDMA2000 system access control LAC protocol link automatic repeat request ARQ sub-layer.

本发明方案通过设置发送包含NACK的状态报告的条件,在不影响包含ACK的状态报告发送的前提下,限制了包含NACK的状态报告的发送,减少了冗余状态报告的发送,并进而减少了冗余的重传PDU,提高了通信链路的利用率。 Under the prerequisite of the present invention transmits a NACK by setting a status report, does not affect the status report sent contain the ACK, the transmission restriction status report containing NACK, reduce the transmission of redundant status report, thus reducing redundant retransmission PDU, improve the utilization of the communication link.

附图说明 BRIEF DESCRIPTION

图1为现有技术中RLC AM实体的功能模型示意图;图2为现有技术中发送实体将PDU发送给接收实体的实现流程示意图;图3为本发明方案一种实施例的实现流程图。 FIG. 1 is a functional schematic diagram of the prior art model of the RLC AM entity; FIG. 2 is an implementation flow of a receiving entity PDU to a transmitting entity in a schematic view of the prior art; FIG. 3 is an embodiment for implementing flowchart of an embodiment.

具体实施方式 Detailed ways

经分析得到,之所以会出现冗余数据传输的问题,主要有两方面的原因。 Upon analysis of the reason for the problem of redundant data transfer occurs, there are two reasons. 一方面是因为通信系统中PDU和状态报告的传输都存在延时,发送实体在发送一个PDU之后,最少也需要一个环路时间(RTT)才能获得该接收实体是否正确接收到PDU的信息。 Partly because the PDU transmission in communication systems are present and status reporting delay after sending entity transmits a PDU, also requires a minimum loop time (RTT) of the receiving entity to obtain information correctly received PDU. 由于延时的存在,因此会出现下述步骤中的情况:步骤A、发送实体第一次发送PDU,该PDU在传输过程中出现了错误,即没有发送到接收实体;步骤B、接收实体检测到该PDU丢失,向发送实体发送包含NACK的状态报告;步骤C、发送实体收到针对该PDU的状态报告后,第二次将该PDU传输给接收实体,即重传该PDU;步骤D、由于存在延时,在收到发送实体重传的PDU之前,接收实体再次向发送方发送包含NACK的状态报告;步骤E、在再次发出状态报告后,接收实体收到了发送实体重传来的PDU,之后向发送实体发送包含ACK的状态报告;步骤F、由于存在延时,在接收到接收实体发送的包含ACK的状态报告之前,发送实体首先收到接收实体在步骤D中发送的包含NACK的状态报告,因此第三次向接收实体传输该PDU。 Due to the presence of the delay, so there will be the case of the following steps: Step A, the entity transmitting the first transmission PDU, the PDU error occurred during transmission, i.e. not transmitted to the receiving entity; procedure B, the receiving entity detection to the PDU is missing, the status report comprises sending a NACK to the transmitting entity; Procedure C, for the transmitting entity receives a status report of the PDU, the PDU is transmitted to the second receiving entity, i.e. retransmitting the PDU; Procedure D, Because of the delay before the received retransmission PDU transmission entity, the receiving entity re-transmits a NACK status report to the sender; step E, after sending the status report again, the receiving entity receives the transmitted PDU in the retransmission entity after transmitting the status report contains an ACK to the transmitting entity; step F., due to a delay, before receiving the status report sent by the receiving entity comprising an ACK, NACK sending entity comprising receiving entity first receives transmitted in step D status report, so that the third PDU transmitted to the receiving entity.

显然,上述过程造成了冗余数据的传输。 Obviously, this process resulted in transmission of redundant data.

出现冗余数据传输的另一方面原因是:为适应不同的业务要求,RLC支持多种状态查询和状态报告的触发机制。 The other reason redundant data transmission occurs is: to adapt to different business requirements, RLC state support for multiple queries and status triggering mechanism for reporting. 状态查询机制允许接收实体根据不同的机制灵活地进行状态查询,状态报告的触发机制允许接收实体根据不同的机制灵活地配置状态报告,对于发送实体来说,只需要根据状态报告中的信息选择需要重传的PDU即可。 Status query mechanism allows the receiving entity status queries flexibly according to different mechanisms, the status report trigger mechanism allows for flexibility in configuring the receiving entity status report according to different mechanisms, for sending entity, the only need to select the information in the status report PDU can be retransmitted. 但是,如果接收实体根据多种不同的机制发送针对同一PDU的状态报告,则可能会出现接收实体在较短的时间间隔内连续发送状态报告的情况,这就会导致状态报告到达发送实体的频率较高,从而可能会出现冗余的PDUs重传,进而浪费空口资源。 However, if the receiving entity sends a status report for the same PDU, the situation may occur continuously receiving entity sends a status report within a short time interval based on a variety of different mechanisms, which would lead to the sending entity status report frequency of arrival higher, which may appear redundant PDUs retransmission, and thus a waste of air interface resources.

目前协议中定义的定时器状态禁止定时器(Timer_Status_Prohibit)和查询禁止定时器(Timer_Poll_Prohibit),可以通过设置特定的时间段,将状态报告的发送频率限定在一定的范围内。 Current timer status prohibit timer as defined in the protocol (the Timer_Status_Prohibit) prohibit timer and queries (the Timer_Poll_Prohibit), by setting a specific time period, the transmission frequency of the status report is defined in a certain range. 以Timer_Status_Prohibit为例,该定时器只有在使用了状态报告禁止功能时才被启动,如果Timer_Status_Prohibit处于正常工作状态,则接收实体不能发送包含NACK或ACK的状态报告。 To Timer_Status_Prohibit for example, the timer will only use the status report prohibit function is activated only if Timer_Status_Prohibit in normal working condition, then the receiving entity can not send a status report with the NACK or ACK. 当接收实体针对STATUS PDU的状态报告发送后启动该定时器,并且在该定时器超时前不能发送NACK或ACK的新状态报告。 When the receiving entity for a status report sending a STATUS PDU starts the timer, and not send a new ACK or NACK status report before the timer expires. 虽然可以通过设置特定的时间段将状态报告的发送频率限定在一定的范围内,或者说,虽然通过设置较大的Timer_Status_Prohibit和Timer_Poll_Prohibit可以控制状态报告的发送频率,并减少或消除冗余数据的传输,但是,这种方法存在缺陷。 Although the status report transmission frequency by setting a specific time period will be limited to a certain range, or that, although the status report can be controlled by setting a larger Timer_Poll_Prohibit Timer_Status_Prohibit and a transmission frequency, and reduce or eliminate redundant data transmission However, this method is flawed. 这是由于ARQ机制对于ACK和NACK的发送频度要求不同:ACK的频度越高,则发送实体就可以及时清除发送缓冲器中缓存的PDU,从而可以降低发送窗口的阻塞概率、提高链路的利用率、且减少对内存的需求;由于冗余数据单元传送的问题,发送NACK的频率不能太高。 This is due to the ARQ mechanism for the transmission frequency of the ACK and NACK different requirements: the higher the frequency of an ACK, the transmitting entity may transmit timely removal PDUs buffered in the buffer, the blocking probability can be reduced transmission window, improve link utilization, and reduces the memory requirements; problem because the redundant data transmission unit, the transmission frequency of NACK is not too high. 也就是说,现有的技术方案不能同时满足ACK和NACK的要求,且不能很好地杜绝冗余数据单元传送的问题。 That is, the prior art solutions can not meet the requirements of ACK and NACK, and not well to eliminate the problem of redundant data transmission unit.

为了尽量不影响包含ACK的状态报告的发送频率,又能够降低包含NACK的状态报告的发送频率,本发明方案主要是在现有技术的基础上,为每个被检测出没有正确接收的PDU设置一个NACK发送条件,这样,接收实体在发送状态报告之前,首先针对没有被接收实体正确接收的PDU,判断当前是否符合针对该PDU所设置的NACK发送条件,如果不符合,则在状态报告中不包含针对该PDU的NACK;否则,允许在该状态报告中包含针对该PDU的NACK,并为该PDU重新设置NACK发送条件。 In order to minimize the impact of the ACK transmission frequency is included in the status report, and can reduce the transmission frequency is included in the NACK status report PDU embodiment of the present invention is mainly provided on the basis of the prior art, it is detected for each of the not correctly received a NACK transmission conditions so that the receiving entity prior to sending the status report, first of all for the PDU is not the receiving entity correctly received, determining whether the current compliance NACK transmission conditions for that PDU set, if not, it is not in the status report comprising NACK for the PDU; otherwise, to allow for the PDU comprising NACK in the status report, and re-set the conditions for the NACK transmission PDU.

本发明方案中,可以针对每个被检测出没有正确接收的PDU设置NACK发送条件,当然,针对不同PDU的NACK发送条件可能不同;也可以针对所有被检测出没有正确接收的PDU设置同一个NACK发送条件,也即,所有被检测出没有正确接收的PDU对应同一个NACK发送条件。 Embodiment of the present invention may be provided for each of the NACK transmission condition is not detected correctly received PDU, of course, may be different for different conditions NACK transmission of PDU; may be provided with a NACK for all detected not correctly received PDU transmission condition, i.e., all detected not correctly received PDU corresponds to the same conditions NACK transmission.

下面首先对每个被检测出没有正确接收的PDU设置NACK发送条件的情况进行详细说明。 Hereinafter, each is detected not correctly received PDU NACK transmission condition setting first be described in detail. 参见图3,本实施例以对PDU(n)进行设置为例,且所设置的定时装置为定时器,对应的解决方案包括以下步骤:步骤301、为每个被检测出没有正确接收的PDU设置NACK发送条件。 PDU in step 301, is not received correctly for each detected: Referring to Figure 3, in the present embodiment of the PDU (n-) is set as an example, the timing means and the timer set for the corresponding solution comprising the steps of set NACK transmission conditions.

所设置的NACK发送条件为:如果当前是针对某个PDU第一次发送NACK状态报告,则可以在状态报告中设置针对该PDU的NACK;如果之前已针对该PDU发送过NACK状态报告,或者说,当前需要发送的NACK状态报告不是第一次,则还需要判断是否存在与该PDU对应、且处于正常工作状态的NACK定时装置,如果存在这样的定时装置,则不能在状态报告中设置针对该PDU的NACK;否则,可以在状态报告中设置针对该PDU的NACK。 NACK transmission conditions are set as follows: If the current state is the first time to send NACK reporting for a PDU, you can set for NACK of the PDU in the status report; if you have previously sent a NACK status report for the PDU, or , the current NACK status report to be transmitted is not the first time, it is determined whether required NACK PDU corresponds to the timing means, and in the presence of normal working condition, if the presence of such timing means is not provided for the status report PDU's NACK; otherwise, NACK can be set for the PDU in the status report.

在本实施例中,该定时装置即为定时器,定时装置处于工作状态即为定时器被启动且尚未超时。 In the present embodiment, the timing means is the timer, the timer is in working condition is the timer is started and not yet timed out.

步骤302~303、接收实体在需要发送状态报告时,首先判断是否需要针对PDU(n)发送NACK,如果是,则进入步骤304,否则,进入步骤307。 Step 302 ~ 303, the receiving entity needs to send a status report at first determines whether a NACK for the transmission PDU (n), if yes, the process proceeds to step 304, otherwise, proceeds to step 307.

步骤304、接收实体进一步判断该NACK是否为第一次发送,如果是,则确定符合NACK发送条件,并进入步骤306;否则,进入步骤305。 Step 304, the receiving entity further determines whether the NACK transmission for the first time, if so, to determine compliance NACK transmission condition, and proceeds to step 306; otherwise, proceeds to step 305.

步骤305、接收实体判断当前是否存在与该PDU对应、且处于正常工作状态的NACK定时器,如果存在,则确定不符合NACK发送条件,并进入步骤307;否则,确定符合NACK发送条件,并进入步骤306。 Step 305, the receiving entity determines whether there is a current corresponding to the PDUs, and in normal operation of the NACK timer, if present, it is determined that NACK transmission does not meet the condition, and proceeds to step 307; otherwise, NACK transmission conditions to determine compliance, and into step 306.

步骤306、在状态报告中添加针对该PDU(n)的NACK,之后进入步骤307。 Step 306, adding a NACK for the PDU (n) in the status report, and then proceeds to step 307.

步骤307、接收实体处理下一个PDU。 Step 307, the processing at a receiving entity PDU.

在步骤307中,接收实体如果确定状态报告中还可以包含针对其他PDU的NACK,则继续处理下一个PDU,否则,接收实体将当前的状态报告发送给发送实体。 In step 307, the receiving entity determines if the status report may also contain other NACK for the PDU, the process continues to the next PDU, otherwise, the current receiving entity sends a status report to the transmitting entity.

通过以上步骤,即可实现本发明的目的。 Through the above steps, to achieve the object of the present invention.

另外,接收实体在处理完状态报告、并将该状态报告发送给发送实体时,还应重新初始化针对该PDU(n)以及该状态报告中的其他NACK所对应的PDU的定时器。 Further, when the receiving entity has been processed status report, and sends the status report to the transmitting entity, a timer for that it should be reinitialized PDU (n-) and other NACK status report corresponding PDU. 当然,接收实体也可以在将这些NACK加入状态报告后,立即重新初始化对应的定时器。 Of course, the receiving entity may be added after the NACK status report immediately re-initialize the corresponding timer. 对于初始化定时器来说,如果当前存在与该PDU对应的NACK定时器,则直接启动该定时器即可;否则,为该PDU设定一个NACK定时器,并启动该定时器。 For initialize the timer, if the current existence of the PDU corresponding NACK timer, the timer can be started directly; otherwise, set a timer for NACK PDU, and start the timer.

也就是说,上述方案首先为检测到出现问题的PDU设定NACK发送条件,接收实体在向发送实体发送状态报告时,则首先针对被检测出没有正确接收的PDU,判断是否满足设定的NACK发送条件,如果满足,则允许在状态报告中增加针对该PDU的NACK;否则,在该状态报告中不包含针对该PDU的NACK。 That is, the above-described first embodiment to detect the set of problems PDU NACK transmission conditions, when the receiving entity transmits a status report to the transmitting entity, for the first detected is not correctly received PDU, judges whether a set NACK transmission conditions, if satisfied, allows for increased NACK PDU in the status report; otherwise, the status report for a NACK is not included in the PDU. 也就是说,如果接收实体已经针对某PDU启动了定时器,则在该定时器时间内,即使接收实体又触发了针对该PDU的NACK,也不能向发送实体发送该NACK。 That is, if the receiving entity has started a timer for a PDU, then the timer in time, even if the receiving entity has triggered, it can not send the NACK NACK to the sending entity for the PDU. 只有在没有与PDU对应的定时器,以及有与PDU对应的定时器、但该定时器没有启动或定时器超时的情况下,接收实体才能在状态报告中包含针对该PDU的NACK,并将该状态报告发送到发送实体。 Only timers with no corresponding PDU, and the PDU has a lower corresponding timer, but the timer does not start or the timer expires, the receiving entity can contain NACK for the PDU in the status report, and the status report to the transmitting entity.

当然,还可以将定时装置设置为计数器,并将该计数器设置为根据一定的时间间隔进行计数。 Of course, the timing means may also be provided for the counter, and the counter counts the set according to a certain time interval. 由于MAC以固定的时间间隔向RLC发送用于通知RLC能够发送到MAC的数据速率,也即,在一定时间内RLC可以发送到MAC的PDU的数量,因此,可以将该计数器设置为根据MAC发送来的MAC状态指示原语(MAC_Status_Ind)进行计数。 Since the MAC at a fixed time interval for informing the RLC transmits RLC data rate can be transmitted to the MAC, i.e., within a certain period of time may be sent to the RLC PDU number of the MAC, therefore, the counter can be set to transmit the MAC to the MAC status indication primitive (MAC_Status_Ind) counts. 还要设置计数器计数范围的上限和下限,其中,将计数器的初始值设置为计数范围的上限。 Also set upper and lower limits of the range counter, wherein an initial value of the counter is set to the upper limit of the count range. 且计数器在启动后,每隔一定的时间间隔,即将自身的计数值减一。 After the counter is started and, at regular intervals, i.e. its counter is decreased by one. 对于根据MAC_Status_Ind进行计数的情况来说,则为每收到MAC发送来的MAC_Status_Ind一次,则将自身的计数值减一。 In the case of counting according MAC_Status_Ind, the receipt of each MAC_Status_Ind MAC was transmitted once, then its count value by one.

通过这样的设置,接收实体在发送状态报告时,如果检测出存在与某个PDU对应的计数器,则还需要判断针对该PDU所对应的计数器是否为计数范围的下限,如果是,则在该状态报告中包含针对该PDU的NACK,否则,不在该状态报告中包含针对该PDU的NACK。 With this arrangement, when the receiving entity transmitting the status report, if it is detected the presence of a PDU corresponding to the counter, but also the need for determining whether the counter corresponding PDU is a lower limit of the count, if it is, then in this state the report contains the PDU for NACK, otherwise, not in the status report contains NACK for the PDU.

上述是将计数器计数范围的初始值设置为计数范围的上限,类似地,还可以将初始值设置为计数范围的下限,则计数器在启动后,每收到MAC发送来的MAC_Status_Ind一次,则将当前的计数值加一。 The above is the initial value of the counter is set to the upper limit of the range of count range, similarly, the initial value may also be set as a lower limit count range of the counter after the start, each received MAC_Status_Ind MAC transmitted once, the current plus a count value. 这样,接收实体在发送状态报告时,如果检测出存在与某个PDU对应的计数器,则还需要判断针对某个被检测出没有正确接收的PDU所对应的计数器是否为设置的计数范围上限,如果是,则在状态报告中包含针对该PDU的NACK,否则,不在状态报告中包含针对该PDU的NACK。 Thus, when the receiving entity transmitting the status report, if it is detected the presence of a PDU corresponding to the counter, determines the need for a certain count upper limit is not detected correctly received PDU corresponding to whether the counter set, if yes, included in a status report for the NACK PDU, otherwise, is not included in the NACK status report for the PDU.

对于定时装置为计数器的情况来说,同样,重新初始化计数器可以是在将状态报告发送给发送实体时,也可以是在将NACK包含在状态报告时。 For the case where the timing device is a counter, the same, the counter can be reinitialized when the status report is sent to the sending entity, a NACK may be in contained in the status report. 另外,重新初始化计数器为重新设置计数器的初始值。 Further, to reinitialize the counter resets the counter initial value. 对于初始化计数器来说,如果当前存在与该PDU对应的计数器,则直接启动该计数器即可;否则,为该PDU设定一个计数器,并启动该计数器。 For initializes the counter, if the current PDU corresponding to the presence of the counter, the counter can be started directly; otherwise, set for a PDU counter, and starts the counter.

上述是针对每个被检测出没有正确接收的PDU设置NACK发送条件,对于针对所有被检测出没有正确接收的PDU设置NACK发送条件,也即本发明方案的第二种处理方式来说,与上述处理过程的主要区别在于以下几点:1)本处理过程是针对所有被检测出没有正确接收的PDU设置NACK发送条件。 The above is detected for each received PDU is not correctly set NACK transmission condition is detected for all for setting PDU NACK transmission condition is not received correctly, i.e. the second embodiment of the present invention process embodiment, the above-described the main difference between the process in the following points: 1) of the present process is not correctly received for all the PDU provided NACK transmission condition is detected. 所设置的NACK发送条件为:判断是否存在处于正常工作状态的NACK定时装置,如果是,则不符合NACK发送条件;否则,符合NACK发送条件。 NACK transmission to the set conditions: timing means determines whether NACK is present in normal operation, if it is, NACK transmission condition was not met; otherwise, consistent with NACK transmission conditions.

2)本处理过程在接收实体在确定需要针对PDU(n)发送NACK时,直接判断是否存在处于正常工作状态的NACK定时装置,如果是,则确定不符合NACK发送条件;否则,确定符合NACK发送条件。 2) The process in the receiving entity when determining the need to send a NACK for PDU (n), it is directly determined NACK timing device is present in normal working condition, if it is, it is determined not to meet the NACK transmission conditions; otherwise, to determine compliance NACK transmission condition.

通过上述第二种方式,如果接收实体已经针对所有被检测出没有正确接收的PDU启动了定时装置,则在该定时装置时间内,即使接收实体又触发了针对其中某个PDU的NACK,也不能向发送实体发送针对该PDU的NACK。 By the above-described second embodiment, if the receiving entity has been started is detected for all correctly received PDU is not the timing means, the timing means in the time, even if the receiving entity which in turn triggers a NACK for a PDU, nor NACK is sent for the PDU to the transmitting entity. 只有在没有设置NACK定时装置,以及存在对应的NACK定时装置、但该定时装置没有启动或定时器超时的情况下,接收实体才能在状态报告中包含针对该PDU的NACK,并将该状态报告发送到发送实体。 Only in case no NACK timing setting means and timing means corresponding to NACK exists, but does not start the timer device or timer expires, the receiving entity can comprise a NACK for the PDU in the status report, and sends the status report to the transmitting entity. 当然,这种处理方式中的定时装置同样可以为定时器,也可以为计数器,还可以是其它能够实现定时的装置。 Of course, this approach may also be a timing device is a timer may be a counter, may be another timing device can be realized.

以上所述仅为本发明方案的较佳实施例,并不用以限定本发明的保护范围。 The above are only preferred embodiments of the present invention embodiments are not intended to limit the scope of the present invention.

Claims (10)

1.一种控制状态报告发送频率的方法,适用于包括发送实体和接收实体的通信系统,且发送实体与接收实体之间采用自动重传机制进行通信,其特征在于,该方法包括以下步骤:a.为每个被检测出没有正确接收的协议数据单元PDU设定否定确认NACK发送条件;b.接收实体每次向发送实体发送状态报告之前,针对本状态报告考察范围内的每个没有被本接收实体正确接收的PDU,判断当前是否符合为该PDU设定的NACK发送条件,如果不符合,则在状态报告中不包含该PDU的NACK;否则,允许在状态报告中包含该PDU的NACK;c.接收实体将该状态报告发送给发送实体。 A method of controlling a status report transmission frequency for a communication system comprising a sending entity and a receiving entity, and transmitting an automatic retransmission communication mechanism between the entity and a receiving entity, wherein, the method comprising the steps of: . a protocol data unit is detected for each received PDU is not correctly set to a negative acknowledgment NACK transmission conditions; each B prior to the transmitting entity transmits a status report, for each receiving entity is not within the scope of the present investigation status report. this receiving entity correctly received PDU, determining whether the current NACK transmission condition setting for the PDU, if not, the PDU is not included in the NACK status report; otherwise, comprising allowing the NACK PDU in the status report, ;. C entity receiving the status report to the transmitting entity.
2.根据权利要求1所述的方法,其特征在于所述步骤a中,所述发送条件设定为:首先判断当前是否为针对PDU第一次发送NACK状态报告,如果是,则符合NACK发送条件;否则,进一步判断是否存在与该PDU对应、且处于正常工作状态的NACK定时装置,如果存在,则不符合NACK发送条件,否则,符合NACK发送条件;所述步骤c进一步包括:接收实体分别初始化状态报告中的每个NACK对应PDU的NACK发送条件;所述初始化NACK发送条件为:如果当前存在与所述PDU对应的NACK定时装置,则直接启动该定时装置;否则,为该PDU设定一个NACK定时装置并启动。 The method according to claim 1, wherein said step a, the transmission conditions are set as follows: First, determine whether the current for the first transmission for NACK status report PDUs, if so, in line with NACK transmission conditions; otherwise, further determining whether the PDU corresponding to the presence, in a normal operating state and NACK timing means, if present, NACK transmission condition was not met, otherwise meet the conditions NACK transmission; C further comprising the steps of: receiving entity, respectively, initialization NACK status report corresponding to each of the PDU NACK transmission conditions; NACK transmission conditions for the initialization: if the NACK timer means corresponding to the PDU currently exist, directly activate the timing device; otherwise, set for PDU NACK and start a timing means.
3.根据权利要求1所述的方法,其特征在于所述步骤a中,所述为每个被检测出没有正确接收的PDU设定的NACK发送条件为同一个NACK发送条件;步骤a中,所述NACK发送条件设定为:判断是否存在处于正常工作状态的NACK定时装置,如果存在,则不符合NACK发送条件;否则,符合NACK发送条件;所述步骤c进一步包括:初始化NACK发送条件;所述初始化NACK发送条件为:如果当前存在所述NACK定时装置,则直接启动该定时装置;否则,设定一个NACK定时装置并启动。 3. The method according to claim 1, wherein said step a, the NACK transmission condition is detected for each received PDU is not correctly set to the same condition NACK transmission; a step of, the NACK transmission conditions are set: determining whether NACK timing means in a normal operating state is present, and if present, NACK transmission condition was not met; otherwise, consistent with NACK transmission condition; step c further comprising: initializing NACK transmission conditions; the initialization conditions for the NACK transmission: if the NACK timer means currently exist, directly activate the timing device; otherwise, set a NACK and start the timing means.
4.根据权利要求2或3所述的方法,其特征在于,所述NACK定时装置为NACK定时器;步骤a中,所述NACK定时装置处于正常工作状态为:NACK定时器已经启动且尚未超时。 4. The method of claim 2 or claim 3, wherein said timing means is NACK NACK timer; step a, the NACK timing means in a normal working state: NACK timer has been started and has not timed .
5.根据权利要求2或3所述的方法,其特征在于,所述NACK定时装置为计数器;步骤a中,所述NACK定时装置处于正常工作状态为:计数器处于计数状态。 5. The method of claim 2 or claim 3, wherein said timer means is a counter NACK; step a, the NACK timing means in a normal working state: the state of the counter is counting.
6.根据权利要求5所述的方法,其特征在于,该方法进一步包括:设置计数器计数范围的上限和下限,设置计数器的初始值为计数范围的上限,且将计数器设置为:每隔一定的时间间隔,计数器将当前的计数值减一;步骤a中,所述计数器处于计数状态为:计数器当前数值大于计数范围的下限;步骤c中,所述初始化NACK发送条件进一步包括:将计数器的初始值设置为计数范围的上限。 6. The method according to claim 5, characterized in that, the method further comprising: setting upper and lower limits of the range counter, set the counter count initial value of the upper limit range, and setting the counter: constant intervals time interval, the counter counts down by a current; step a, the count state of the counter is: the current counter value is greater than the lower limit count range; step c, the initialization condition NACK transmission further comprising: an initial counter value is set to an upper limit count range.
7.根据权利要求6所述的方法,其特征在于,所述每隔一定的时间间隔,计数器将当前的计数值减一为:每收到媒介接入控制MAC发送来的MAC状态指示原语MAC_Status_Ind一次,计数器将当前的计数值减一。 7. The method according to claim 6, wherein said every certain time interval, the current count value of the counter decrements to: receive a medium access control (MAC) for each MAC status indication primitive transmitted MAC_Status_Ind once, the current count value of the counter by one.
8.根据权利要求5所述的方法,其特征在于,该方法进一步包括:设置计数器计数范围的上限和下限,设置计数器的初始值为计数范围的下限,且将计数器设置为:每隔一定的时间间隔,计数器将当前的计数值加一;步骤a中,所述计数器处于计数状态为:计数器当前数值小于计数器计数范围的上限;步骤c中,所述初始化NACK发送条件进一步包括:将计数器的初始值设置为计数范围的下限。 8. The method as claimed in claim 5, characterized in that, the method further comprising: setting upper and lower limits of the range counter, the initial value of the counter set the lower limit count range, and setting the counter: constant intervals time interval, the current counter a count value; step a, the count state of the counter is: the current value of the counter is smaller than the upper limit of the range counter; step c, the initialization condition NACK transmission further comprising: a counter the initial value is set to the lower limit count range.
9.根据权利要求8所述的方法,其特征在于,所述每隔一定的时间间隔,计数器将当前的计数值加一为:每收到MAC发送来的MAC_Status_Ind一次,计数器将当前的计数值加一。 9. The method according to claim 8, characterized in that said every certain time interval, the current counter count value to a: MAC_Status_Ind MAC receive each transmitted once, the current count value of the counter plus one.
10.根据权利要求1所述的方法,其特征在于,所述自动重传请求机制位于宽带码分多址WCDMA或时分同步码分多址TD-SCDMA系统中无线链路控制RLC协议的确认模式AM;或位于CDMA 2000系统中链路接入控制LAC协议的自动重传请求ARQ子层。 10. The method according to claim 1, characterized in that said automatic retransmission request mechanism is located in an acknowledged mode or WCDMA Wideband Code Division Multiple Time Division Synchronous Code Division Multiple TD-SCDMA system in the RLC protocol AM; CDMA 2000 system or in a link access control protocol LAC automatic retransmission request ARQ sub-layer.
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WO2009023986A1 (en) * 2007-08-20 2009-02-26 Alcatel Shanghai Bell Co., Ltd. The method and the device for triggered repeat in the multicast system
CN101291199B (en) 2007-04-20 2011-03-09 大唐移动通信设备有限公司 Method and apparatus for detecting correctness of feedback message in hybrid automatic retransmission request
CN101453311B (en) 2007-11-29 2011-12-28 中兴通讯股份有限公司 An automatic retransmission request method for triggering a status report
CN103138905A (en) * 2011-11-24 2013-06-05 华为技术有限公司 Radio link control (RLC) data package transmission confirmation method and RLC acknowledge mode (AM) entity sender
WO2019024837A1 (en) * 2017-08-02 2019-02-07 华为技术有限公司 Counting method and communication device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101291199B (en) 2007-04-20 2011-03-09 大唐移动通信设备有限公司 Method and apparatus for detecting correctness of feedback message in hybrid automatic retransmission request
WO2009023986A1 (en) * 2007-08-20 2009-02-26 Alcatel Shanghai Bell Co., Ltd. The method and the device for triggered repeat in the multicast system
US8667356B2 (en) 2007-08-20 2014-03-04 Alcatel Lucent Method for triggering retransmission in a multicast system and apparatus implementing the method
CN101453311B (en) 2007-11-29 2011-12-28 中兴通讯股份有限公司 An automatic retransmission request method for triggering a status report
CN103138905A (en) * 2011-11-24 2013-06-05 华为技术有限公司 Radio link control (RLC) data package transmission confirmation method and RLC acknowledge mode (AM) entity sender
CN103138905B (en) * 2011-11-24 2016-08-03 华为技术有限公司 The confirmation method of RLC packet transmission and RLC AM entity sender
CN105897385A (en) * 2011-11-24 2016-08-24 华为技术有限公司 Method for acknowledging transmission of RLC (Radio Link Control) data packet and RLC AM (Acknowledge Mode) entity sender
WO2019024837A1 (en) * 2017-08-02 2019-02-07 华为技术有限公司 Counting method and communication device

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