WO2017000564A1 - 数据处理方法及装置 - Google Patents

数据处理方法及装置 Download PDF

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Publication number
WO2017000564A1
WO2017000564A1 PCT/CN2016/074084 CN2016074084W WO2017000564A1 WO 2017000564 A1 WO2017000564 A1 WO 2017000564A1 CN 2016074084 W CN2016074084 W CN 2016074084W WO 2017000564 A1 WO2017000564 A1 WO 2017000564A1
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data
rlc
pdcp
layer
header
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PCT/CN2016/074084
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English (en)
French (fr)
Inventor
林妍
魏铮
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中兴通讯股份有限公司
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Publication of WO2017000564A1 publication Critical patent/WO2017000564A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts

Definitions

  • the present invention relates to the field of communications, and in particular to a data processing method and apparatus.
  • Radio Link is received at the receiving end due to the underlying packet loss, medium access control (MAC) layer hybrid automatic repeat request (HARQ) process.
  • Control abbreviated as RLC
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • the transmitting end RLC, PDCP transmits the sequence number SN in the RLC header and the PDCP header, and the receiving end RLC, PDCP determines whether to repeat the packet according to the SN of the current data and the received SN, and reorders the data by using the SN.
  • the sender RLC entity maintains a state variable and adds it as an SN value to the RLC header; the receiver RLC entity maintains a set of state variables according to the SN of the RLC header, and records the submitted data through the set of state variables, to be received.
  • the SN range of data, data to be sorted, etc. after receiving a new data packet, compares the SN of the data packet with the set of state variables, completes the repeated detection, reordering processing, and updates the corresponding state variable.
  • the transmitting and receiving PDCP entities maintain state variables at the same time, and perform repeated detection and reordering processing through SN and state variables. It can be seen that the sender and the receiver need to ensure that the state variables are consistent. If they are inconsistent, the packet will be abnormally lost.
  • the RLC and PDCP of the receiving end and the transmitting end may be inconsistent in some scenarios.
  • the user can access the call later.
  • the RLC and PDCP of the user terminal are newly created, and the state variables are initial values, and the state variables of the RLC and PDCP of the transmitting base station are not necessarily initial values.
  • the state variable of the terminal RLC entity cannot be consistent with the target cell; when some abnormal conditions occur, the base station reconstructs the RLC and PDCP entities to ensure that the call is normal, and the state variable becomes the initial value.
  • the terminal cannot know.
  • the base station sends the SN according to the new state variable, and the terminal receives the state variable according to the base station RLC and PDCP before reconstruction, which may result in data packet loss and media plane interruption.
  • the embodiment of the invention provides a data processing method and device, so as to at least solve the problem that the receiving end has abnormal packet loss to the received data processing in the related art.
  • a data processing method including: in a trunking communication system, a packet header of a received data is removed at a radio link control RLC layer, and is removed at the RLC layer. Packet header data Line reorganization; submit the reassembled data to the PDCP layer; the PDCP layer removes the header of the received data and submits it to the upper layer.
  • the radio link control RLC layer removes the header of the received data, and reassembles the data of the packet header at the RLC layer, including: receiving the RLC protocol data unit PDU at the RLC layer.
  • the RLC header is removed, and the RLC PDU of the RLC header is reassembled into an RLC service data unit SDU, and the RLC SDU is submitted to the PDCP layer.
  • the header of the received data is removed from the PDCP layer and submitted to the upper layer, including: removing the PDCP header from the received PDCP PDU at the PDCP layer, and submitting the PDCP SDU of the PDCP header to the upper layer. .
  • the method further includes: decrypting the data to obtain a PDCP SDU; In the case where the data is control plane data, the data is subjected to integrity check processing; and when the data is user plane data, the PDCP SDU is decompressed.
  • the buffering or discarding process is performed on the part that cannot be reorganized.
  • a data processing apparatus is further provided, which is applied to a trunking communication system, including: a reassembly module, configured to remove a header of a received data at a radio link control RLC layer, Retrieving the data of the packet header at the RLC layer; the submitting module is configured to submit the reassembled data to the PDCP layer of the packet data convergence protocol; and removing the module, and setting the data to be received at the PDCP layer The header is removed and submitted to the upper layer.
  • the reassembly module includes: a reassembly unit, configured to remove the RLC header of the received RLC protocol data unit PDU at the RLC layer, reassemble the RLC PDU that removes the RLC header into an RLC service data unit SDU, and submit the RLC SDU Go to the PDCP layer.
  • a reassembly unit configured to remove the RLC header of the received RLC protocol data unit PDU at the RLC layer, reassemble the RLC PDU that removes the RLC header into an RLC service data unit SDU, and submit the RLC SDU Go to the PDCP layer.
  • the removing module includes: removing the unit, and setting the PDCP PDU to be removed from the PDCP PDU at the PDCP layer; and submitting the unit, and setting the PDCP SDU with the PDCP header removed to the upper layer.
  • the apparatus further includes: a decryption unit configured to perform decryption processing on the data to obtain a PDCP SDU; and a verification unit configured to complete the data if the data is control plane data
  • the verification processing unit is configured to decompress the PDCP SDU when the data is user plane data.
  • the device further includes: a buffering or discarding unit, configured to perform a buffering or discarding process on the part that cannot be reorganized in the process of reorganizing the data of the packet header by the RLC layer.
  • a buffering or discarding unit configured to perform a buffering or discarding process on the part that cannot be reorganized in the process of reorganizing the data of the packet header by the RLC layer.
  • the packet header of the received data is removed at the RLC layer of the radio link control, and the data of the packet header is removed at the RLC layer for reorganization;
  • the data is submitted to the PDCP layer;
  • the header of the received data is removed from the PDCP layer and submitted to the upper layer, which solves the problem that the receiving end has abnormal packet loss to the received data processing in the related art. Repeat detection and reordering to effectively prevent abnormal packet loss.
  • FIG. 1 is a flowchart of processing of a receiving end RLC layer entity according to the related art
  • FIG. 2 is a flowchart of processing of a PDCP layer entity at a receiving end according to the related art
  • FIG. 3 is a flow chart of a data processing method according to an embodiment of the present invention.
  • FIG. 4 is a block diagram of a data processing apparatus in accordance with an embodiment of the present invention.
  • FIG. 5 is a flowchart of a processing process of a receiving end RLC entity according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a PDCP layer entity processing at a receiving end according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a transmitted RLC PDU according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a received RLC PDU according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a fragmentation of an RLC SDU according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of an RLC SDU group packet of a transmitting end according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of RLC and PDCP entity transmission and reception in accordance with an embodiment of the present invention.
  • FIG. 1 is a flowchart of processing by the RLC layer entity at the receiving end according to the related art. As shown in FIG. 1 , the method includes:
  • Step S102 the receiving end RLC entity receives the RLC PDU
  • Step S104 Maintain and update the state variable according to the sequence number SN of the received RLC PDU, and perform repeated detection and reordering processing;
  • Step S106 removing the RLC header of the RLC PDU
  • Step S108 reorganizing the RLC PDU with the RLC header removed into an RLC SDU
  • step S110 the RLC SDU is submitted to the upper layer.
  • FIG. 2 is a flowchart of processing of a PDCP layer entity at a receiving end according to the related art. As shown in FIG. 2, the method includes:
  • Step S202 the receiving end PDCP entity receives the PDCP PDU
  • Step S204 removing the PDCP header
  • Step S206 performing decryption processing on the data to obtain a PDCP SDU
  • Step S208 performing integrity verification processing on the data
  • Step S210 performing decompression processing on the PDCP SDU
  • Step S212 performing repeated detection and reordering processing on the PDCP SDU
  • step S214 the PDCP SDU is submitted to the upper layer.
  • FIG. 3 is a flowchart of a data processing method according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
  • Step S302 in the trunking communication system, the radio link control RLC layer removes the header of the received data, and the data of the packet header is removed at the RLC layer for reorganization;
  • Step S304 submit the reassembled data to the PDCP layer of the packet data convergence protocol
  • Step S306 the header of the received data is removed at the PDCP layer and submitted to the upper layer.
  • the packet header of the received data is removed at the radio link control RLC layer, and the data of the packet header is removed at the RLC layer for reassembly; the reassembled data is submitted to the PDCP.
  • the PDCP layer removes the header of the received data and submits it to the upper layer, which solves the problem that the receiving end has abnormal packet loss to the received data processing in the related art, because no repeated detection and reordering are performed. Processing, effectively preventing abnormal packet loss.
  • the radio link control RLC layer removes the header of the received data, and reassembling the data of the header at the RLC layer may include: receiving at the RLC layer.
  • the RLC header of the RLC protocol data unit PDU is removed, the RLC PDU with the RLC header removed is reorganized into an RLC service data unit SDU, and the RLC SDU is submitted to the PDCP layer.
  • Removing the header of the received data in the PDCP layer and submitting the header to the upper layer may include: removing the PDCP header from the received PDCP PDU at the PDCP layer, and submitting the PDCP SDU of the PDCP header to the upper layer.
  • the PDCP layer After the PDCP layer removes the PDCP PDU from the received PDCP PDU, the data is decrypted to obtain a PDCP SDU; in the case where the data is control plane data, integrity verification processing is performed on the data; In the case of user plane data, the PDCP SDU is decompressed, and the PDCP SDU with the PDCP header removed is submitted to the upper layer.
  • the portion that cannot be reassembled is buffered or discarded.
  • FIG. 4 is a block diagram of a data processing apparatus according to an embodiment of the present invention. As shown in FIG.
  • the reassembly module 42 is configured to remove the header of the received data at the radio link control RLC layer, and the data of the packet header is removed at the RLC layer for reorganization;
  • the submitting module 44 is configured to submit the reassembled data to the packet data convergence protocol PDCP layer;
  • the module 46 is removed, and the header of the received data is removed at the PDCP layer and submitted to the upper layer.
  • the reassembly module 42 includes: a reassembly unit, configured to remove the RLC header of the received RLC protocol data unit PDU at the RLC layer, reassemble the RLC PDU with the RLC header removed into an RLC service data unit SDU, and submit the RLC SDU Go to the PDCP layer.
  • a reassembly unit configured to remove the RLC header of the received RLC protocol data unit PDU at the RLC layer, reassemble the RLC PDU with the RLC header removed into an RLC service data unit SDU, and submit the RLC SDU Go to the PDCP layer.
  • the removing module 46 includes: a removing unit, configured to remove the PDCP header from the received PDCP PDU at the PDCP layer; and a submitting unit configured to submit the PDCP SDU with the PDCP header removed to the upper layer.
  • the apparatus further includes: a decryption unit configured to perform decryption processing on the data to obtain a PDCP SDU; and a verification unit configured to perform integrity verification processing on the data when the data is control plane data
  • the decompression unit is configured to decompress the PDCP SDU in the case where the data is user plane data.
  • the apparatus further includes: a buffering or discarding unit, configured to perform a buffering or discarding process on the part that cannot be reorganized in the process of reorganizing the data of the packet header by the RLC layer.
  • a buffering or discarding unit configured to perform a buffering or discarding process on the part that cannot be reorganized in the process of reorganizing the data of the packet header by the RLC layer.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing modules may be implemented by, but not limited to, the foregoing modules are located in different processors in any combination, for example, each of the foregoing. Modules are all located in the same processor; or each of the above modules is located in a different processor.
  • FIG. 5 is a flowchart of a process of processing an RLC entity at a receiving end according to an embodiment of the present invention. As shown in FIG. 5, for the RLC layer, no repeated detection processing is performed on the RLC PDU, and no state variable is required to be maintained, and the RLC PDU is not heavy. Sort processing, including:
  • Step S502 the receiving end RLC entity receives the RLC PDU
  • Step S504 the RLC PDU is not repeatedly detected and reordered, and the state variable is not updated.
  • Step S506 removing the RLC header of the RLC PDU
  • Step S508 reorganizing the RLC PDU with the RLC header removed into an RLC SDU
  • step S510 the RLC SDU is submitted to the upper layer.
  • FIG. 6 is a flowchart of processing of a PDCP layer entity on a receiving end according to an embodiment of the present invention. As shown in FIG. 6 , for the PDCP layer, the packet is not repeatedly processed, and the packet is not reordered.
  • Step S602 the receiving end PDCP entity receives the PDCP PDU
  • Step S604 removing the PDCP header
  • Step S606 performing decryption processing on the data to obtain a PDCP SDU
  • Step S608 performing integrity verification processing on the data
  • Step S610 performing decompression processing on the PDCP SDU
  • Step S612 the PDCP SDU is not repeatedly detected and reordered
  • step S614 the PDCP SDU is submitted to the upper layer.
  • the SNs carried by the packets sent by the sender are sent in the order of 0, 1, 2, 3, ... until the SN reaches the maximum value.
  • the SNs carried by the packets received by the receiving end are not consecutive in the order of 0, 1, 2, 3..., but some SNs are lost in the middle.
  • FIG. 8 is a schematic diagram of a received RLC PDU according to an embodiment of the present invention. As shown in FIG. 8, according to the foregoing method of the embodiment of the present invention, a process of receiving a RLC is as follows:
  • Reorganize RLC SDU Reorganize RLC SDU0 and submit it to the upper layer; the part belonging to RLC SDU1 cannot be reorganized and temporarily cached;
  • the process of receiving PDCP PDUs by the PDCP layer is as follows:
  • the receiving end PDCP entity receives the PDCP PDU
  • the SN of the cell 2 received for the first time may be different or the same.
  • Reorganizing the RLC SDU reorganizing the RLC SDU1 and submitting it to the upper layer; part of the cache belonging to the RLC SDU2;
  • the process of receiving PDCP PDUs by the PDCP layer is as follows:
  • the receiving end PDCP entity receives the PDCP PDU
  • the base station detects some abnormal conditions. To ensure that the call is normal, the base station reconstructs the RLC and PDCP entities, and its state variable becomes the initial value. After that, the base station will start to send the SN with the initial value. However, some terminals in the trunk call cannot know the RLC and PDCP reestablishment of the base station. For example, the cluster group without RRC connection calls the user terminal, and these terminals will continue to receive data according to the state variables before the base station RLC and PDCP reconstruction.
  • the terminal RLC and the PDCP entity discard the data as duplicate packets in the repeated detection process, and the receiving end can be normal after the state variables of the transmitting end and the receiving end become identical again. Receive data. This will cause the terminal to interrupt data for a period of time, affecting the user experience. If the method of the present invention is used, after the base station RLC and the PDCP entity are reconstructed, the terminal can still receive data normally. Specifically include:
  • FIG. 11 is a schematic diagram of RLC and PDCP entity sending and receiving according to an embodiment of the present invention. As shown in FIG. 11, the RLC and PDCP entities are sent to the transmitting end. The process of sending is the same as in the prior art, and details are not described herein again.
  • the process of receiving the RLC PDU at the RLC layer of the receiving end is as follows:
  • Reorganizing the RLC SDU reorganizing the RLC SDU6 and submitting it to the upper layer; part of the cache belonging to the RLC SDU7;
  • the RLC entity submits the reassembled RLC SDU to the PDCP entity.
  • the process of receiving the PDCP PDU by the PDCP layer at the receiving end is as follows:
  • the PDCP entity at the receiving end receives the PDCP PDU from the RLC entity
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the foregoing embodiments of the present invention can be applied to the field of communications, and solve the problem that the receiving end has abnormal packet loss to the received data processing in the related art. Since no repeated detection and reordering processing is performed, abnormal packet loss is effectively prevented.

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Abstract

本发明公开了一种数据处理方法及装置，其中，该方法包括：在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在该RLC层将去掉报文头的数据进行重组；将重组后的数据提交到PDCP层；在该PDCP层将接收到的数据的报文头去掉，并提交到上层，解决了相关技术中接收端对接收到的数据处理存在异常丢包的问题，由于不做重复检测和重排序处理，有效防止了异常丢包。

Description

数据处理方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及数据处理方法及装置。
背景技术
在现有技术中，由于底层丢包、介质访问控制(Media Access Control，简称为MAC)层混合自动重传请求(Hybrid Automatic Repeat Request，简称为HARQ)过程，接收端无线链路控制(Radio Link Control，简称为RLC)和分组数据汇聚协议(Packet Data Convergence Protocol，简称为PDCP)层收到的数据存在乱序和重复，为保证数据按序、正确的递交到上层，RLC和PDCP会进行重复检测和重排序处理。为此，发送端RLC、PDCP在RLC头、PDCP头中传递序列号SN，接收端RLC、PDCP根据当前数据的SN和已收到的SN来判断是否重复包、并用SN对数据重新排序。具体来说，发送端RLC实体维护一个状态变量并作为SN值添加到RLC头中；接收端RLC实体根据RLC头的SN维护一组状态变量，通过这组状态变量记录下已提交数据、待接收数据、待排序数据等的SN范围，当收到新的数据包后，将该数据包的SN与这组状态变量比较，完成重复检测、重排序处理，并更新相应的状态变量。类似的，发送端和接收端PDCP实体同时维护状态变量，通过SN和状态变量完成重复检测、重排序处理。由此可见，发送端和接收端需要保证状态变量一致，如果不一致，将导致数据包异常丢失。
由于集群业务特点，在某些场景下，接收端和发送端的RLC、PDCP可能存在不一致。例如，在集群呼叫中，用户可以迟后接入呼叫，此时用户终端的RLC和PDCP是新建，其状态变量都是初始值，而发送端基站的RLC和PDCP的状态变量不一定是初始值；当用户切换到目标小区，终端RLC实体的状态变量不能保证与目标小区的一致；当出现某些异常情况，为保证呼叫正常进行，基站将RLC和PDCP实体重建，其状态变量变为初始值，而终端却无法获知，此时基站按照新的状态变量发送SN，而终端按照基站RLC和PDCP重建前的状态变量接收，可能导致数据包丢失，媒体面中断。
针对相关技术中接收端对接收到的数据处理存在异常丢包的问题，还未提出有效的解决方案。
发明内容
本发明实施例提供了数据处理方法及装置，以至少解决相关技术中接收端对接收到的数据处理存在异常丢包的问题。
根据本发明实施例的一个方面，提供了一种数据处理方法，包括：在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进 行重组；将重组后的数据提交到PDCP层；在所述PDCP层将接收到的数据的报文头去掉，并提交到上层。
进一步地，在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组包括：在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到所述PDCP层。
进一步地，在所述PDCP层将接收到的数据的报文头去掉，并提交到上层包括：在所述PDCP层将接收到的PDCP PDU去掉PDCP头，将去掉PDCP头的PDCP SDU提交给上层。
进一步地，在所述PDCP层将接收到的PDCP PDU去掉PDCP头之后，将去掉PDCP头的PDCP SDU提交给上层之前，所述方法还包括：对所述数据进行解密处理，得到PDCP SDU；在所述数据为控制面数据的情况下，对所述数据进行完整性校验处理；在所述数据为用户面数据的情况下，对PDCP SDU进行解压缩处理。
进一步地，在所述RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
根据本发明实施例的另一方面，还提供了一种数据处理装置，应用于集群通信系统，包括：重组模块，设置为在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组；提交模块，设置为将重组后的数据提交到分组数据汇聚协议PDCP层；去掉模块，设置为在所述PDCP层将接收到的数据的报文头去掉，并提交到上层。
进一步地，所述重组模块包括：重组单元，设置为在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到所述PDCP层。
进一步地，所述去掉模块包括：去掉单元，设置为在所述PDCP层将接收到的PDCP PDU去掉PDCP头；提交单元，设置为将去掉PDCP头的PDCP SDU提交给上层。
进一步地，所述装置还包括：解密单元，设置为对所述数据进行解密处理，得到PDCP SDU；校验单元，设置为在所述数据为控制面数据的情况下，对所述数据进行完整性校验处理；解压缩单元，设置为在所述数据为用户面数据的情况下，对PDCP SDU进行解压缩处理。
进一步地，所述装置还包括：缓存或丢弃单元，设置为在所述RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
通过本发明实施例，采用在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组；将重组后的数据提交到PDCP层；在所述PDCP层将接收到的数据的报文头去掉，并提交到上层，解决了相关技术中接收端对接收到的数据处理存在异常丢包的问题，由于不做重复检测和重排序处理，有效防止了异常丢包。
附图说明
此处所说明的附图用来提供对本发明实施例的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据相关技术中的接收端RLC层实体处理的流程图；
图2是根据相关技术中的接收端PDCP层实体处理的流程图；
图3是根据本发明实施例的数据处理方法的流程图；
图4是根据本发明实施例的数据处理装置的框图；
图5是根据本发明实施例的接收端RLC实体处理过程的流程图；
图6是根据本发明实施例的接收端PDCP层实体处理的流程图；
图7是根据本发明实施例的发送的RLC PDU的示意图；
图8是根据本发明实施例的接收的RLC PDU的示意图；
图9是根据本发明实施例的RLC SDU分段示意图；
图10是根据本发明实施例的发送端的RLC SDU组包的示意图；
图11是根据本发明实施例的RLC和PDCP实体发送和接收的示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在相关技术中，3GPP协议规定了接收端RLC层实体处理方法，图1是根据相关技术中的接收端RLC层实体处理的流程图，如图1所示，包括：
步骤S102，接收端RLC实体收到RLC PDU；
步骤S104，根据接收的RLC PDU的序列号SN对状态变量进行维护、更新，并进行重复检测、重排序处理；
步骤S106，将RLC PDU的RLC头去掉；
步骤S108，将去掉RLC头的RLC PDU重组为RLC SDU；
步骤S110，将RLC SDU提交给上层。
图2是根据相关技术中的接收端PDCP层实体处理的流程图，如图2所示，包括：
步骤S202，接收端PDCP实体收到PDCP PDU；
步骤S204，去掉PDCP头；
步骤S206，对数据进行解密处理，得到PDCP SDU；
步骤S208，对数据进行完整性校验处理；
步骤S210，对PDCP SDU进行解压缩处理；
步骤S212，对PDCP SDU进行重复检测、重排序处理；
步骤S214，将PDCP SDU提交给上层。
在集群通信系统中，集群控制信道和集群业务信道是集群通信中点对多点的共享信道。集群共享信道的特点之一是只有下行信道，而没有上行反馈，因此RLC和PDCP不存在乱序和重传，集群共享信道下不必要进行重复检测、重排序处理。在本实施例中提供了一种数据处理方法，图3是根据本发明实施例的数据处理方法的流程图，如图3所示，该流程包括如下步骤：
步骤S302，在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在该RLC层将去掉报文头的数据进行重组；
步骤S304，将重组后的数据提交到分组数据汇聚协议PDCP层；
步骤S306，在该PDCP层将接收到的数据的报文头去掉，并提交到上层。
通过上述步骤，在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在该RLC层将去掉报文头的数据进行重组；将重组后的数据提交到PDCP层；在该PDCP层将接收到的数据的报文头去掉，并提交到上层，解决了相关技术中接收端对接收到的数据处理存在异常丢包的问题，由于不做重复检测和重排序处理，有效防止了异常丢包。
在一个可选的实施例中，在无线链路控制RLC层将接收到的数据的报文头去掉，在该RLC层将去掉报文头的数据进行重组可以包括：在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到该PDCP层。
在该PDCP层将接收到的数据的报文头去掉，并提交到上层可以包括：在该PDCP层将接收到的PDCP PDU去掉PDCP头，将去掉PDCP头的PDCP SDU提交给上层。
在该PDCP层将接收到的PDCP PDU去掉PDCP头之后对该数据进行解密处理，得到PDCP SDU；在该数据为控制面数据的情况下，对该数据进行完整性校验处理；在该数据为用户面数据的情况下，对PDCP SDU进行解压缩处理，将去掉PDCP头的PDCP SDU提交给上层。
在该RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
本发明实施例还提供了一种数据处理装置，应用于集群通信系统，图4是根据本发明实施例的数据处理装置的框图，如图4所示，包括：
重组模块42，设置为在无线链路控制RLC层将接收到的数据的报文头去掉，在该RLC层将去掉报文头的数据进行重组；
提交模块44，设置为将重组后的数据提交到分组数据汇聚协议PDCP层；
去掉模块46，设置为在该PDCP层将接收到的数据的报文头去掉，并提交到上层。
进一步地，该重组模块42包括：重组单元，设置为在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到该PDCP层。
进一步地，该去掉模块46包括：去掉单元，设置为在该PDCP层将接收到的PDCP PDU去掉PDCP头；提交单元，设置为将去掉PDCP头的PDCP SDU提交给上层。
进一步地，该装置还包括：解密单元，设置为对该数据进行解密处理，得到PDCP SDU；校验单元，设置为在该数据为控制面数据的情况下，对该数据进行完整性校验处理；解压缩单元，设置为在该数据为用户面数据的情况下，对PDCP SDU进行解压缩处理。
进一步地，该装置还包括：缓存或丢弃单元，设置为在该RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
需要说明的是，上述的各个模块可以通过软件或硬件实现，对于后者，可以通过以下方式实现，但不限于此，上述各个模块以任意组合的方式位于不同的处理器中，例如，上述各个模块均位于同一处理器中；或者上述的各个模块分别位于不同的处理器中。
针对相关技术中存在的上述问题，下面结合具体的可选实施例进行进一步说明，下述可选实施例结合了上述可选实施例及其可选实施方式。
由于集群下行共享信道发送的数据包不存在乱序和重传，没必要进行重复检测、重排序处理；同时某些场景下由于重复检测会导致异常丢包，因此考虑简化RLC和PDCP层的处理，以适应集群共享信道业务特点。
图5是根据本发明实施例的接收端RLC实体处理过程的流程图，如图5所示，对于RLC层，对RLC PDU不做重复检测处理，不需要维护状态变量，对RLC PDU不做重排序处理，具体包括：
步骤S502，接收端RLC实体收到RLC PDU；
步骤S504，对RLC PDU不做重复检测、重排序处理，不更新状态变量；
步骤S506，将RLC PDU的RLC头去掉；
步骤S508，将去掉RLC头的RLC PDU重组为RLC SDU；
步骤S510，将RLC SDU提交到上层。
图6是根据本发明实施例的接收端PDCP层实体处理的流程图，如图6所示，对于PDCP层，对报文不做重复检测处理，对报文不做重排序处理，具体包括：
步骤S602，接收端PDCP实体收到PDCP PDU；
步骤S604，去掉PDCP头；
步骤S606，对数据进行解密处理，得到PDCP SDU；
步骤S608，对数据进行完整性校验处理；
步骤S610，对PDCP SDU进行解压缩处理；
步骤S612，对PDCP SDU不做重复检测、重排序；
步骤S614，将PDCP SDU提交给上层。
实施例1
集群呼叫建立后，正常情况下，发送端发送的报文所携带的SN按照0,1,2,3…的顺序依次发送，直至SN达到最大值后，从0开始继续循环。在底层有丢包的情况下，接收端收到的报文所携带的SN不会以0,1,2,3…的顺序连贯，而是中间有某些SN丢失。
图7是根据本发明实施例的发送的RLC PDU的示意图，如图7所示，假设发送端连续发送SN＝16,17,18的RLC PDU，RLC SDU的分段，因底层丢包导致SN＝17的RLC PDU丢失，则接收端只收到SN＝16、18的报文。
图8是根据本发明实施例的接收的RLC PDU的示意图，如图8所示，按照本发明实施例的上述方法，接收端RLC的处理过程如下：
1)收到携带SN＝16的RLC PDU；
2)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
3)将RLC PDU的RLC头去掉；
4)重组RLC SDU：重组RLC SDU0，提交到上层；属于RLC SDU1的部分无法重组，暂时缓存；
5)收到携带SN＝18的RLC PDU；
6)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
7)将RLC PDU的RLC头去掉；
8)重组RLC SDU：缓存的属于RLC SDU1的部分、接收到的属于RLC SDU2的部分无法重组完整的RLC SDU，直接丢弃；重组RLC SDU3，提交到上层。
PDCP层收到PDCP PDU的处理过程如下：
1)接收端PDCP实体收到PDCP PDU；
2)去掉PDCP头；
3)对数据进行解密处理，得到PDCP SDU；
4)如果是控制面数据，则对数据进行完整性校验处理；
5)如果是用户面数据，对PDCP SDU进行解压缩处理；
6)不对PDCP SDU做重复检测、重排序处理；
7)将PDCP SDU提交给上层。
实施例2
终端从小区1切换到小区2的场景。由于小区1与小区2的RLC和PDCP实体是分别独立的，两个小区下发送的报文SN没有关联，终端从小区1切换到小区2过程中，终端最后一次接收的小区1的报文和第一次接收的小区2的报文，其SN可能不同也可能相同。
图9是根据本发明实施例的RLC SDU分段示意图，如图9所示，假设终端切换前在小区1上，最后一次接收小区1的报文的SN＝16；之后切换到小区2，第一次接收到小区2的报文的SN＝16。按照本发明实施例的上述方法，接收端RLC实体处理过程如下：
1)终端在小区1，收到携带SN＝16的RLC PDU；
2)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
3)将SN＝16的报文的RLC头去掉；
4)重组RLC SDU：重组出RLC SDU1，提交到上层；属于RLC SDU2的部分缓存；
5)终端切换到小区2，收到携带SN＝16的RLC PDU；
6)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
7)将SN＝16的报文的RLC头去掉；
8)重组RLC SDU：缓存的未组包的RLC PDU、属于RLC SDU6的部分无法重组完整的RLC SDU，直接丢弃；重组RLC SDU7，提交到上层。
PDCP层收到PDCP PDU的处理过程如下：
1)接收端PDCP实体收到PDCP PDU；
2)去掉PDCP头；
3)对数据进行解密处理，得到PDCP SDU；
4)如果是控制面数据，则对数据进行完整性校验处理；
5)如果是用户面数据，对PDCP SDU进行解压缩处理；
6)不对PDCP SDU做重复检测、重排序处理；
7)将PDCP SDU提交给上层。
实施例3
集群呼叫过程中，基站检测到出现某些异常情况，为保证呼叫正常进行，基站将RLC和PDCP实体重建，其状态变量变为初始值，此后基站将以初始值开始发送SN。而集群呼叫中的某些终端无法获知基站的RLC和PDCP重建，比如，无RRC连接的集群组呼听用户终端，这些终端将按照基站RLC和PDCP重建前的状态变量继续接收数据。按照现有技术，因与发送端状态变量不一致，终端RLC和PDCP实体在重复检测处理中将这些数据作为重复包丢弃掉，直到发送端与接收端状态变量重新变为一致后，接收端才能正常接收数据。这将造成终端一段时间内数据中断，影响用户体验。若使用本发明方法，基站RLC和PDCP实体重建后，终端仍然可以正常接收数据。具体包括：
图10是根据本发明实施例的发送端的RLC SDU组包的示意图，假设发送端的RLC SDU组包如图10所示，发送端发送SN＝16的RLC PDU后，将RLC和PDCP实体重建，接着发送SN＝0的RLC PDU。接收端RLC实体先后收到SN＝16、SN＝0的RLC PDU，图11是根据本发明实施例的RLC和PDCP实体发送和接收的示意图，如图11所示，对于发送端的RLC和PDCP实体发送的过程与现有技术中相同，在此不再赘述。
接收端的RLC层收到RLC PDU的处理流程如下：
1)接收端的RLC实体从发送端接收到携带SN＝16的RLC PDU；
2)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
3)将RLC PDU的RLC头去掉；
4)重组RLC SDU：重组出RLC SDU6，提交到上层；属于RLC SDU7的部分缓存；
4)接收端收到携带SN＝0的RLC PDU；
5)对RLC PDU不做重复检测、重排序处理，不更新状态变量；
6)将RLC PDU的RLC头去掉；
7)重组RLC SDU：缓存的RLC PDU无法重组RLC SDU，直接丢弃；重组RLC SDU0，提交到上层；属于RLC SDU1的部分缓存。
8)RLC实体将重组后的RLC SDU提交给PDCP实体。
接收端的PDCP层收到PDCP PDU的处理过程如下：
1)接收端的PDCP实体从RLC实体接收到PDCP PDU；
2)去掉PDCP头；
3)对数据进行解密处理，得到PDCP SDU；
4)如果是控制面数据，则对数据进行完整性校验处理；
5)如果是用户面数据，对PDCP SDU进行解压缩处理；
6)不对PDCP SDU做重复检测、重排序处理；
7)将PDCP SDU提交给上层。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。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。
工业实用性
上述的本发明实施例，可以应用于通讯领域，解决了相关技术中接收端对接收到的数据处理存在异常丢包的问题，由于不做重复检测和重排序处理，有效防止了异常丢包。

Claims (10)

  1. 一种数据处理方法，包括：
    在集群通信系统中，在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组；
    将重组后的数据提交到分组数据汇聚协议PDCP层；
    在所述PDCP层将接收到的数据的报文头去掉，并提交到上层。
  2. 根据权利要求1所述的方法，其中，在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组包括：
    在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到所述PDCP层。
  3. 根据权利要求2所述的方法，其中，在所述PDCP层将接收到的数据的报文头去掉，并提交到上层包括：
    在所述PDCP层将接收到的PDCP PDU去掉PDCP头，将去掉PDCP头的PDCP SDU提交给上层。
  4. 根据权利要求3所述的方法，其中，在所述PDCP层将接收到的PDCP PDU去掉PDCP头之后，将去掉PDCP头的PDCP SDU提交给上层之前，所述方法还包括：
    对所述数据进行解密处理，得到PDCP SDU；
    在所述数据为控制面数据的情况下，对所述数据进行完整性校验处理；
    在所述数据为用户面数据的情况下，对PDCP SDU进行解压缩处理。
  5. 根据权利要求1至4中任一项所述的方法，其中，在所述RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
  6. 一种数据处理装置，应用于集群通信系统，包括：
    重组模块，设置为在无线链路控制RLC层将接收到的数据的报文头去掉，在所述RLC层将去掉报文头的数据进行重组；
    提交模块，设置为将重组后的数据提交到分组数据汇聚协议PDCP层；
    去掉模块，设置为在所述PDCP层将接收到的数据的报文头去掉，并提交到上层。
  7. 根据权利要求6所述的装置，其中，所述重组模块包括：
    重组单元，设置为在RLC层将接收到的RLC协议数据单元PDU的RLC头去掉，将去掉RLC头的RLC PDU重组为RLC服务数据单元SDU，将RLC SDU提交到所述PDCP层。
  8. 根据权利要求7所述的装置，其中，所述去掉模块包括：
    去掉单元，设置为在所述PDCP层将接收到的PDCP PDU去掉PDCP头；
    提交单元，设置为将去掉PDCP头的PDCP SDU提交给上层。
  9. 根据权利要求8所述的装置，其中，所述装置还包括：
    解密单元，设置为对所述数据进行解密处理，得到PDCP SDU；
    校验单元，设置为在所述数据为控制面数据的情况下，对所述数据进行完整性校验处理；
    解压缩单元，设置为在所述数据为用户面数据的情况下，对PDCP SDU进行解压缩处理。
  10. 根据权利要求6至9中任一项所述的装置，其中，所述装置还包括：
    缓存或丢弃单元，设置为在所述RLC层将去掉报文头的数据进行重组的过程中，对于无法进行重组的部分，进行缓存或丢弃处理。
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