WO2017140277A1 - 无线链路控制功能实体及其处理数据的方法、存储介质 - Google Patents

无线链路控制功能实体及其处理数据的方法、存储介质 Download PDF

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WO2017140277A1
WO2017140277A1 PCT/CN2017/074164 CN2017074164W WO2017140277A1 WO 2017140277 A1 WO2017140277 A1 WO 2017140277A1 CN 2017074164 W CN2017074164 W CN 2017074164W WO 2017140277 A1 WO2017140277 A1 WO 2017140277A1
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rlc
data
function entity
function
sub
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French (fr)
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孙军帅
王莹莹
崔春风
陈卓
黄学艳
易芝玲
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China Mobile Communications Group Co Ltd
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China Mobile Communications Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H04L49/9057—Arrangements for supporting packet reassembly or resequencing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]

Definitions

  • the present invention relates to access network technologies in the wireless field, and in particular, to a radio link control function entity, a method for processing data thereof, and a storage medium.
  • Next Generation Fronthaul Interface network architecture for cloud platforms based on centralized, collaborative, cloud-based and green wireless access networks (C-RAN, Centralized, Cooperative, Cloud&Clean-Radio Access Network)
  • C-RAN Centralized, Cooperative, Cloud&Clean-Radio Access Network
  • RRS Radio Remote System
  • RRS Radio Remote System
  • a flexible connection between the RCC and the RRS is adopted.
  • the functions between the RCC and the RRS can be flexibly divided, and the RCC and the RRS are connected through a transmission network.
  • the network connection between the RCC and the RRS introduces a large delay.
  • the maximum one-way time The delay is about 1.5ms, and the one-way delay between the physical access control (MAC) function entity and the radio link control (RLC) functional entity generally does not exceed 10us, and the MAC function
  • the delay from the time when the entity sends the data request (Data Req) to the data received by the RLC function entity (Data) is generally within 300 us.
  • the RLC/MAC function partitioning method under the fronthaul of the traditional or ideal transmission network cannot be applied to the NGFI network architecture.
  • the prior art performs segmentation and reconstruction between a Packet Data Convergence Protocol (PDCP) functional entity and an RLC functional entity, and adds a reordering of PDCP Packet Data Unit (PDU) in the PDCP functional entity. Function, the function of the RLC function entity remains unchanged.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • the PDCP function entity does not need to process the transparent mode (TM) data. If the PDCP function entity supports the data packet sorting function, in order to complete the protocol function, it is necessary to increase the TM mode. deal with.
  • the PDCP function entity sorts the serial number (SN, Serial Number) of the PDCP PDU, it is necessary to receive the PDCP PDUs sent by multiple RLC function entities before they are sorted, resulting in large complexity and prolonged sorting.
  • an embodiment of the present invention provides a radio link control function entity, a method for processing data, and a storage medium.
  • the method for processing data by the RLC function entity provided by the embodiment of the present invention, the RLC function entity is divided into a centralized RLC sub-function entity and a distributed RLC sub-function entity; the method includes:
  • the second data is sent to the Packet Data Convergence Protocol PDCP functional entity.
  • the centralized RLC sub-function entity sends the first data to each of the distributed RLC sub-function entities, including:
  • the service data unit SDU sent by the centralized RLC sub-function entity to each of the distributed RLC sub-function entities constitutes an RLC SDU cluster
  • the centralized RLC sub-function entity sends the RLC SDUs in the RLC SDU cluster to each of the distributed RLC sub-function entities in a receiving order.
  • the centralized RLC sub-function entity sorts the second data, and sends the sorted second data to the packet data convergence protocol PDCP functional entity, including:
  • the centralized RLC sub-function entity sorts the RLC SDUs in the RLC SDU cluster, and sends the sorted RLC SDUs to the PDCP functional entities in order.
  • each of the distributed RLC sub-function entities sends the received second data to the centralized RLC sub-function entity, including:
  • Each of the distributed RLC sub-function entities receives the second data in sequence, and reassembles the second data, and sequentially sends the reassembled second data to the centralized RLC sub-function entity.
  • the centralized RLC sub-function entity includes: a transparent mode RLC function entity, an acknowledge mode/non-acknowledge mode RLC sending entity, and an acknowledge mode/non-acknowledge mode RLC receiving entity.
  • a radio link control RLC function entity provided by the embodiment of the present invention includes: a centralized RLC sub-function entity and a distributed RLC sub-function entity;
  • the centralized RLC sub-function entity is configured to send first data to each of the distributed RLC sub-function entities;
  • the distributed RLC sub-function entity is configured to send the received second data to the centralized RLC sub-function entity;
  • the centralized RLC sub-function entity is further configured to sort the second data sent by the distributed RLC sub-function entity, and send the sorted second data to the PDCP function entity.
  • the SDUs that are sent by the centralized RLC sub-function entity to each of the distributed RLC sub-function entities constitute an RLC SDU cluster
  • the centralized RLC sub-function entity is further configured to send the RLC SDUs in the RLC SDU cluster to each of the distributed RLC sub-function entities in a receiving order.
  • the centralized RLC sub-function entity is further configured to sort the RLC SDUs in the RLC SDU cluster, and send the sorted RLC SDUs to the PDCP functional entity in sequence.
  • the distributed RLC sub-function entity is further configured to receive the second data in order, and reassemble the second data, and then send the reassembled second data to the centralized RLC sub-function entity.
  • the centralized RLC sub-function entity includes: a transparent mode RLC function entity, an acknowledge mode/non-acknowledge mode RLC sending entity, and an acknowledge mode/non-acknowledge mode RLC receiving entity.
  • An embodiment of the present invention provides a storage medium, where the computer program stores a computer program, where the computer program is configured to execute the wireless link control RLC function entity to process data when the processor runs the computer program. method.
  • the RLC functional entity is divided into a centralized RLC sub-function entity and a distributed RLC sub-function entity; the centralized RLC sub-function entity sends data to each distributed RLC sub-function entity. Transmitting, by the distributed RLC sub-function entity, the received data to the centralized RLC sub-function entity, the centralized RLC sub-function entity sorting the data, and sending the sorted data to PDCP functional entity.
  • the embodiment of the present invention provides a distributed RLC functional entity of an Open Loop Push Mode in a wireless mobile network, and the solution of the embodiment of the present invention is not a PDCP functional entity.
  • RLC Remote Location
  • D-RLC Distributed RLC
  • the C-RLC function is new. Added function, the D-RLC function keeps the existing RLC function unchanged.
  • the C-RLC directly sends the data to the D-RLC.
  • the D-RLC directly sends the data to the C-RLC.
  • Figure 1 is a schematic diagram of RCC and RRS deployment under NGFI;
  • FIG. 2 is a schematic flowchart of a method for processing data by an RLC function entity according to an embodiment of the present invention
  • FIG. 3 is an overall frame diagram of an open-loop cramming distributed RLC according to an embodiment of the present invention.
  • FIG. 4 is an overall frame diagram of an RLC function according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an RLC functional entity according to an embodiment of the present invention.
  • the 5G network architecture proposes a distributed architecture of access networks.
  • the air interface protocol stacks are respectively running on different distributed entities, and the transmission between distributed entities is non-ideal transmission.
  • the transmission between RCC-RRS is non-ideal transmission, so it is necessary to consider the partition reconstruction of the protocol stack function under non-ideal transmission.
  • the embodiment of the present invention re-divides the functions of the RLC functional entity according to the non-ideal fronthaul transmission characteristics between the RCC-RRSs, so as to adapt to various performance indexes when the non-ideal transmission network is used between the RCC-RRSs.
  • the embodiment of the present invention provides an Open Loop Push Mode distributed RLC scheme, which is an embodiment of the present invention.
  • the technical solution is compatible with the existing RLC protocol stack function and adds new processing functions, and does not have any influence on the PDCP protocol function.
  • FIG. 2 is a schematic flowchart of a method for processing data by an RLC function entity according to an embodiment of the present invention.
  • an RLC functional entity is divided into a centralized RLC sub-function entity and a distributed RLC sub-function entity; as shown in FIG. 2
  • the method for processing data by a distributed RLC functional entity includes the following steps:
  • Step 201 The centralized RLC sub-function entity sends the first data to each of the distributed RLC sub-function entities.
  • an embodiment of the present invention divides an RLC functional entity into two functional entities, C-RLC and D-RLC.
  • the C-RLC refers to a centralized RLC sub-function entity
  • the D-RLC refers to a distributed RLC sub-function entity.
  • Each D-RLC is a Branch of the Radio Link
  • one C-RLC may correspond to multiple D-RLCs
  • the C-RLC corresponds to one radio bearer (RB, Radio Bearer) of each UE
  • RB Radio Bearer
  • each The D-RLC is responsible for providing data transmission and reception functions for an air interface channel of a user equipment (UE, User Equipment).
  • the C-RLC and the D-RLC exchange and receive data packets, and there is no need to exchange any data amount control information between the two, and the D-RLC does not need to send a data request to the C-RLC.
  • the RLC sends data to the D-RLC according to the data throughput sent by each D-RLC.
  • Step 202 The distributed RLC sub-function entity sends the received second data to the centralized RLC sub-function entity, and the centralized RLC sub-function entity sorts the second data, and The sorted second data is sent to the packet data convergence protocol PDCP functional entity.
  • the first data and the second data in the embodiment of the present invention are different data.
  • each D-RLC sends the received data to the C-RLC, and the C-RLC sorts according to the order specified by the protocol, and then delivers to the PDCP functional entity in order.
  • Each D-RLC receives data in the order in which it is sent to the C-RLC.
  • the C-RLC is only responsible for the ordering of data packets between different D-RLCs.
  • connection between the C-RLC and the D-RLC may be performed through a non-ideal transmission network of the NGFI, or may be performed through an ideal transmission network.
  • the function of the C-RLC (that is, the centralized RLC sub-function entity) is: when the data is sent, the service data unit (SDU) sent to each D-RLC forms an RLC SDU cluster ( Cluster), the RLC SDUs in the RLC SDU cluster are sent to each D-RLC in the order of reception, and the RLC SDUs are not cut to ensure that all RLC SDUs are sent; when receiving data, multiple D-RLCs are completed.
  • the sorted RLC SDU cluster data is sorted and reported to the upper layer (that is, the PDCP functional entity) in the correct order.
  • the function of the D-RLC (that is, the distributed RLC sub-function entity) is: when the data is sent, after receiving multiple RLC SDU data packets in the RLC SDU cluster from the C-RLC, according to the current 36.322 protocol
  • the existing RLC protocol function completes the sequential transmission of data, including data cascading, header expansion, retransmission, and the like; when receiving data, the data is sequentially received according to the existing RLC protocol function in the 36.322 protocol. And reorganizing, the data is submitted to the C-RLC in the correct order of the RLC SDU cluster.
  • the centralized RLC sub-function entity sends data to each of the distributed RLC sub-function entities, including:
  • the service data unit SDU sent by the centralized RLC sub-function entity to each of the distributed RLC sub-function entities constitutes an RLC SDU cluster
  • the centralized RLC sub-function entity sends the RLC SDUs in the RLC SDU cluster to each of the distributed RLC sub-function entities in a receiving order.
  • the service data unit SDU sent by the centralized RLC sub-function entity to each of the distributed RLC sub-function entities constitutes an RLC SDU cluster
  • the centralized RLC sub-function entity sends the RLC SDUs in the RLC SDU cluster to each of the distributed RLC sub-function entities in a receiving order.
  • the distributed RLC sub-function entity sends the received data to the centralized RLC sub-function entity, including:
  • Each of the distributed RLC sub-function entities receives the data in order, and reorganizes the data, and sequentially sends the reassembled data to the centralized RLC sub-function entity.
  • the RLC functional entity of the embodiment of the present invention also has multiple transmission modes.
  • the RLC functional entity in the transparent mode (TM)/unacknowledged mode (UM)/acknowledgement mode (AM) in the 36.322 protocol is compared.
  • the solution of the embodiment of the present invention designs an overall functional solution in three modes on the basis of ensuring compatibility, and adds a C-RLC function to the original functional entity, and the D-RLC function is a function of the existing three modes. .
  • the C-RLC function is the distribution of data and the reorganization of data on each D-RLC.
  • the AM RLC functional entity since the AM RLC functional entity has both receiving and transmitting functions, the AM RLC functional entity has the C-RLC transceiving function at the same time.
  • the transmission function of C-RLC is combined with the TM/UM RLC transmission entity, and the reception function of C-RLC and TM/UM The RLC receiving entities are combined.
  • the centralized RLC sub-function entity includes: a transparent mode RLC function entity, an acknowledge mode/non-acknowledge mode RLC sending entity, and an acknowledge mode/non-acknowledge mode RLC receiving entity;
  • the centralized RLC sub-function entity When in the transparent mode, the centralized RLC sub-function entity performs data reception/transmission through the transparent mode RLC function entity; when in the acknowledge mode/non-acknowledge mode, The centralized RLC sub-function entity transmits data through the acknowledge mode/non-acknowledge mode RLC transmitting entity, and receives data through the acknowledge mode/non-acknowledge mode RLC receiving entity.
  • FIG. 5 is a schematic structural diagram of an RLC functional entity according to an embodiment of the present invention. As shown in FIG. 5, the functional entity includes: a centralized RLC sub-function entity 51 and a distributed RLC sub-function entity 52;
  • the centralized RLC sub-function entity 51 is configured to send the first data to each of the distributed RLC sub-function entities 52;
  • the distributed RLC sub-function entity 52 is configured to send the received second data to the centralized RLC sub-function entity 51;
  • the centralized RLC sub-function entity 51 is further configured to sort the second data sent by the distributed RLC sub-function entity 52, and send the sorted second data to the PDCP function entity.
  • the first data and the second data are different data.
  • the SDUs sent by the centralized RLC sub-function entity 51 to each of the distributed RLC sub-function entities 52 constitute an RLC SDU cluster;
  • the centralized RLC sub-function entity 51 is further configured to send the RLC SDUs in the RLC SDU cluster to each of the distributed RLC sub-function entities 52 in a receiving order.
  • the centralized RLC sub-function entity 51 is further configured to sort the RLC SDUs in the RLC SDU cluster, and send the sorted RLC SDUs to the PDCP functional entities in order.
  • the distributed RLC sub-function entity 52 is further configured to receive the second data in order, and reassemble the second data, and then send the reassembled second data to the centralized RLC sub-function entity 51 in sequence. .
  • the centralized RLC sub-function entity 51 includes: a transparent mode RLC function entity 511, an acknowledge mode/non-acknowledge mode RLC transmitting entity 512, an acknowledge mode/non-acknowledge mode RLC reception Entity 513; wherein
  • the centralized RLC sub-function entity 51 When in the transparent mode, the centralized RLC sub-function entity 51 performs data reception/transmission through the transparent mode RLC function entity 511; when in the acknowledge mode/non-acknowledge mode, the centralized RLC sub-function entity 51 The data is transmitted by the acknowledgment mode/non-acknowledgment mode RLC transmitting entity 512, and the data is received by the acknowledgment mode/non-acknowledgment mode RLC receiving entity 513.
  • each unit in the RLC functional entity shown in FIG. 5 can be understood by referring to the related description of the method for processing data by the foregoing RLC functional entity.
  • the functions of each unit in the RLC functional entity shown in FIG. 5 can be implemented by a program running on a processor, or can be implemented by a specific logic circuit.
  • the embodiment of the invention further describes a storage medium, wherein the storage medium stores a computer program, and the computer program is configured to execute the radio link control RLC described in the foregoing embodiments when the processor runs the computer program.
  • RLC radio link control
  • the disclosed method and smart device may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; You can choose some of them according to your actual needs. Or all of the units to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the present invention proposes an open-loop cramming distributed RLC functional entity, which does not make any changes to the PDCP functional entity, and divides the RLC functional entity into two functional parts: a centralized RLC sub-functional entity and a distributed RLC sub-functional entity, C -
  • the RLC function is a new function.
  • the D-RLC function keeps the existing RLC function unchanged.
  • the C-RLC directly sends the data to the D-RLC.
  • the D-RLC directly sends the data to the C-RLC.

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Abstract

本发明公开了一种RLC功能实体及其处理数据的方法，所述方法包括：将RLC功能实体划分为集中式RLC子功能实体和分布式RLC子功能实体；所述方法包括：所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据；所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给PDCP功能实体。

Description

无线链路控制功能实体及其处理数据的方法、存储介质 技术领域
本发明涉及无线领域中的接入网技术，尤其涉及一种无线链路控制功能实体及其处理数据的方法、存储介质。
背景技术
基于集中化、协作化、云架构以及绿色的无线接入网络(C-RAN，Centralized、Cooperative、Cloud&Clean-Radio Access Network)的云平台的下一代前传网络接口(NGFI，Next Generation Fronthaul Interface)网络架构针对2G/3G/4G和5G多样的场景，通过灵活的fronthaul接口完成各种场景的覆盖。参照图1，无线云中心(RCC，Radio Cloud Center)完成大数据运算，然后把指令发送给射频远端系统(RRS，Radio Remote System)，RRS在RCC运算结果的基础上完成对应空口的资源分配。同样，每个RRS对从空口采集的信息进行一定的处理后上报给RCC。RCC和RRS之间采用灵活的连接方式，为了降低RCC和RRS之间数据传输压力，RCC和RRS之间的功能可以灵活划分，RCC和RRS之间通过传输网络连接。RCC和RRS之间的网络连接引入了较大的时延，参照目前支持的基于长期演进的语音业务(VoLTE，Voice over Long Term Evolution)的传输网时延和抖动的性能指标，最大单向时延大概为1.5ms左右，而媒体接入控制(MAC，Media Access Control)功能实体与无线链路控制(RLC，Radio Link Control)功能实体之间的单向时延一般不超过10us，并且MAC功能实体从发送数据请求(Data Req)，到收到RLC功能实体的数据(Data)整个过程的时延一般在300us内。显然，传统的或者理想传输网络的fronthaul下的RLC/MAC功能划分方式无法适用于NGFI网络架构上。
现有技术是在分组数据汇聚协议(PDCP，Packet Data Convergence Protocol)功能实体与RLC功能实体之间进行分割重构，在PDCP功能实体中增加PDCP分组数据单元(PDU，Packet Data Unit)的重排序功能，RLC功能实体的功能保持不变。但这种方案存在以下问题：
1、需要在PDCP功能实体中增加对数据包的排序功能，这种方式混淆了RLC功能实体和PDCP功能实体的功能划分，破坏了只有RLC负责数据包排序的协议栈功能划分原则。
2、需要在PDCP功能实体中增加一整套完整的按序发送和接收重排序机制，对PDCP协议栈改动非常大。
3、目前协议中PDCP功能实体不需要对透明模式(TM，Transparent Mode)的数据进行处理，如果PDCP功能实体支持了数据包的排序功能后，为了协议功能的完备性，需要增加对TM模式的处理。
4、PDCP功能实体通过PDCP PDU的序列号(SN，Serial Number)进行排序时，需要收到多个RLC功能实体发送来的PDCP PDU才可能排序，导致复杂度大，排序时延长。
发明内容
为解决上述技术问题，本发明实施例提供了一种无线链路控制功能实体及其处理数据的方法、存储介质。
本发明实施例提供的RLC功能实体处理数据的方法，将RLC功能实体划分为集中式RLC子功能实体和分布式RLC子功能实体；所述方法包括：
所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据；
所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给分组数据汇聚协议PDCP功能实体。
本发明实施例中，所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据，包括：
所述集中式RLC子功能实体发送给所述每个分布式RLC子功能实体的业务数据单元SDU组成RLC SDU簇；
所述集中式RLC子功能实体将所述RLC SDU簇内的RLC SDU按照接收顺序发送到所述每个分布式RLC子功能实体上。
本发明实施例中，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给分组数据汇聚协议PDCP功能实体，包括：
所述集中式RLC子功能实体对RLC SDU簇内的RLC SDU进行排序，并将排序后的RLC SDU按序发送给PDCP功能实体。
本发明实施例中，所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，包括：
所述每个分布式RLC子功能实体按序接收第二数据，并对所述第二数据进行重组后按序将重组后的第二数据发送给所述集中式RLC子功能实体。
本发明实施例中，所述集中式RLC子功能实体包括：透明模式RLC功能实体、确认模式/非确认模式RLC发送实体、确认模式/非确认模式RLC接收实体。
本发明实施例提供的一种无线链路控制RLC功能实体，所述功能实体包括：集中式RLC子功能实体和分布式RLC子功能实体；
所述集中式RLC子功能实体，配置为向所述每个分布式RLC子功能实体发送第一数据；
所述分布式RLC子功能实体，配置为将接收到的第二数据发送给所述集中式RLC子功能实体；
所述集中式RLC子功能实体，还配置为对所述分布式RLC子功能实体发送的第二数据进行排序，并将排序后的第二数据发送给PDCP功能实体。
本发明实施例中，所述集中式RLC子功能实体发送给每个所述分布式RLC子功能实体的SDU组成RLC SDU簇；
所述集中式RLC子功能实体，还配置为将所述RLC SDU簇内的RLC SDU按照接收顺序发送到每个所述分布式RLC子功能实体上。
本发明实施例中，所述集中式RLC子功能实体，还配置为对所述RLC SDU簇内的RLC SDU进行排序，并将排序后的RLC SDU按序发送给PDCP功能实体。
本发明实施例中，所述分布式RLC子功能实体，还配置为按序接收第二数据，并对所述第二数据进行重组后按序将重组后的第二数据发送给所述集中式RLC子功能实体。
本发明实施例中，所述集中式RLC子功能实体包括：透明模式RLC功能实体、确认模式/非确认模式RLC发送实体、确认模式/非确认模式RLC接收实体。
本发明实施例提供一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为当处理器运行所述计算机程序时，执行所述的无线链路控制RLC功能实体处理数据的方法。
本发明实施例的技术方案中，将RLC功能实体划分为集中式RLC子功能实体和分布式RLC子功能实体；所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送数据；所述每个分布式RLC子功能实体将接收到的数据发送给所述集中式RLC子功能实体，所述集中式RLC子功能实体对所述数据进行排序，并将排序后的数据发送给PDCP功能实体。可见，本发明实施例提出了无线移动网络中的一种开环填鸭式(Open Loop Push Mode)的分布式RLC功能实体，本发明实施例的方案不对PDCP功能实体 进行任何改动，把RLC功能实体划分成集中式RLC子功能实体(C-RLC，Centralized RLC)和分布式RLC子功能实体(D-RLC，Distributed RLC)两个功能部分，C-RLC功能为新增功能，D-RLC功能为现有RLC功能保持不变，发送数据时C-RLC直接把数据发送给D-RLC，接收数据时D-RLC直接把数据发送给C-RLC，二者之间不需要交互数据流控的信息，通过开环填鸭式的方式发送和接收数据。能够兼容非连续传输带来的时延；具有很好的扩展性，能够快速支撑海量用户。兼容性好，能够兼容4G/5G网络中的RLC功能实体。
附图说明
图1为NGFI下的RCC和RRS部署示意图；
图2为本发明实施例的RLC功能实体处理数据的方法的流程示意图；
图3为本发明实施例的开环填鸭式分布式RLC的整体框架图；
图4为本发明实施例的RLC功能的整体框架图；
图5为本发明实施例的RLC功能实体的结构组成示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
5G网络架构提出了接入网络的分布式架构，空口协议栈分别运行在不同的分布式实体上，并且分布式实体间的传输为非理想传输。以RCC-RRS分布式架构为例，RCC-RRS之间的传输为非理想传输，所以需要考虑在非理想传输下对协议栈功能的分割重构。基于此，本发明实施例根据RCC-RRS之间非理想的fronthaul的传输特性对RLC功能实体的功能进行重新划分，以适应RCC-RRS之间采用非理想传输网络时的各种性能指标。
针对5G接入网络的分布式架构，以及目前的PDCP/RLC分割重构存在的问题，本发明实施例提出了一种开环填鸭式(Open Loop Push Mode)分布式RLC方案，本发明实施例的技术方案兼容已有RLC协议栈功能的基础上增加了新的处理功能，并不对PDCP协议功能产生任何影响。
图2为本发明实施例的RLC功能实体处理数据的方法的流程示意图，本示例中，将RLC功能实体划分为集中式RLC子功能实体和分布式RLC子功能实体；如图2所示，所述分布式RLC功能实体处理数据的方法包括以下步骤：
步骤201：所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据。
参照图3，本发明实施例将RLC功能实体划分成C-RLC和D-RLC两个功能实体。其中，C-RLC是指集中式RLC子功能实体，D-RLC是指分布式RLC子功能实体。
每个D-RLC为一个支链路(Branch of the Radio Link)，一个C-RLC可以对应多个D-RLC，C-RLC对应每个UE的一个无线承载(RB，Radio Bearer)，每个D-RLC负责为用户设备(UE，User Equipment)的一个空口通道提供数据的收发功能。
本发明实施例中，C-RLC和D-RLC之间通过收发数据包进行交互，二者之间不需要交互任何数据量控制的信息，D-RLC不需要给C-RLC发送数据请求，C-RLC根据每个D-RLC发送的数据吞吐量向D-RLC发送数据。
步骤202：所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给分组数据汇聚协议PDCP功能实体。需要说明的是，本发明实施例中的第一数据和第二数据是不同的数据。
本发明实施例中，每个D-RLC把接收的数据发送给C-RLC，C-RLC按照协议规定的顺序进行排序，然后按序交给PDCP功能实体。每个D-RLC接收数据时按照发送的顺序递交给C-RLC，C-RLC只负责不同D-RLC之间数据包的排序。
本发明实施例中，C-RLC和D-RLC之间的连接可以通过NGFI的非理想的传输网络进行交互，也可以通过理想的传输网络进行交互。
本发明实施例中，C-RLC(即集中式RLC子功能实体)的功能为：发送数据时，发送给每个D-RLC的业务数据单元(SDU，Service Data Unit)组成一个RLC SDU簇(cluster)，RLC SDU cluster内的RLC SDU按照接收顺序发送到每个D-RLC上，并且不对RLC SDU进行切割，保证发送的都是一个完整的RLC SDU；接收数据时，完成多个D-RLC上报的RLC SDU cluster数据的排序，并按照正确顺序上报给高层(即PDCP功能实体)。
本发明实施例中，D-RLC(即分布式RLC子功能实体)的功能为：发送数据时，从C-RLC收到RLC SDU cluster内的多个RLC SDU数据包后，按照目前36.322协议中已有的RLC协议功能，完成数据的按序发送，包括数据的级联、加头、重传等功能；接收数据时，按照目前36.322协议中已有的RLC协议功能，完成数据的按序接收和重组，按照RLC SDU cluster正确的顺序把数据递交给C-RLC。
根据本发明实施例的上述方案，所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送数据，包括：
所述集中式RLC子功能实体发送给所述每个分布式RLC子功能实体的业务数据单元SDU组成RLC SDU簇；
所述集中式RLC子功能实体将所述RLC SDU簇内的RLC SDU按照接收顺序发送到所述每个分布式RLC子功能实体上。
所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送数 据，包括：
所述集中式RLC子功能实体发送给所述每个分布式RLC子功能实体的业务数据单元SDU组成RLC SDU簇；
所述集中式RLC子功能实体将所述RLC SDU簇内的RLC SDU按照接收顺序发送到所述每个分布式RLC子功能实体上。
所述每个分布式RLC子功能实体将接收到的数据发送给所述集中式RLC子功能实体，包括：
所述每个分布式RLC子功能实体按序接收数据，并对所述数据进行重组后按序将重组后的数据发送给所述集中式RLC子功能实体。
此外，本发明实施例的RLC功能实体还具有多种传输模式，参照图4，对比于36.322协议中的透明模式(TM)/非确认模式(UM)/确认模式(AM)下的RLC功能实体，本发明实施例的方案在确保兼容性的基础上设计了三种模式下的总体功能方案，在原来功能实体的基础上增加了C-RLC功能，D-RLC功能为已有三种模式的功能。
在三种模式下，C-RLC功能都为数据的分发和各个D-RLC上数据的重组功能。对于AM下的RLC，因为AM RLC功能实体同时就有接收和发送功能，所以AM RLC功能实体同时具有C-RLC的收发功能。对于TM/UM RLC，因为TM/UM RLC的功能中接收和发送是分离的，因此，C-RLC的发送功能与TM/UM RLC发送实体结合在一起，C-RLC的接收功能与TM/UM RLC接收实体结合在一起。
根据本发明实施例的上述方案，所述集中式RLC子功能实体包括：透明模式RLC功能实体、确认模式/非确认模式RLC发送实体、确认模式/非确认模式RLC接收实体；其中，
当处于透明模式时，所述集中式RLC子功能实体通过所述透明模式RLC功能实体进行数据的接收/发送；当处于确认模式/非确认模式时，所述 集中式RLC子功能实体通过所述确认模式/非确认模式RLC发送实体进行数据的发送，以及通过所述确认模式/非确认模式RLC接收实体进行数据的接收。
图5为本发明实施例的RLC功能实体的结构组成示意图，如图5所示，所述功能实体包括：集中式RLC子功能实体51和分布式RLC子功能实体52；
所述集中式RLC子功能实体51，配置为向所述每个分布式RLC子功能实体52发送第一数据；
所述分布式RLC子功能实体52，配置为将接收到的第二数据发送给所述集中式RLC子功能实体51；
所述集中式RLC子功能实体51，还配置为对所述分布式RLC子功能实体52发送的第二数据进行排序，并将排序后的第二数据发送给PDCP功能实体。
本发明实施例中，第一数据与第二数据是不同的数据。
所述集中式RLC子功能实体51发送给每个所述分布式RLC子功能实体52的SDU组成RLC SDU簇；
所述集中式RLC子功能实体51，还配置为将所述RLC SDU簇内的RLC SDU按照接收顺序发送到每个所述分布式RLC子功能实体52上。
所述集中式RLC子功能实体51，还配置为对所述RLC SDU簇内的RLC SDU进行排序，并将排序后的RLC SDU按序发送给PDCP功能实体。
所述分布式RLC子功能实体52，还配置为按序接收第二数据，并对所述第二数据进行重组后按序将重组后的第二数据发送给所述集中式RLC子功能实体51。
所述集中式RLC子功能实体51包括：透明模式RLC功能实体511、确认模式/非确认模式RLC发送实体512、确认模式/非确认模式RLC接收 实体513；其中，
当处于透明模式时，所述集中式RLC子功能实体51通过所述透明模式RLC功能实体511进行数据的接收/发送；当处于确认模式/非确认模式时，所述集中式RLC子功能实体51通过所述确认模式/非确认模式RLC发送实体512进行数据的发送，以及通过所述确认模式/非确认模式RLC接收实体513进行数据的接收。
本领域技术人员应当理解，图5所示的RLC功能实体中的各单元的实现功能可参照前述RLC功能实体处理数据的方法的相关描述而理解。图5所示的RLC功能实体中的各单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
本发明实施例还记载了一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为当处理器运行所述计算机程序时，执行前述各实施例记载的无线链路控制RLC功能实体处理数据的方法。
本发明实施例所记载的技术方案之间，在不冲突的情况下，可以任意组合。
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和智能设备，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分 或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个第二处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。
工业实用性
本发明提出了一种开环填鸭式的分布式RLC功能实体，不对PDCP功能实体进行任何改动，把RLC功能实体划分成集中式RLC子功能实体和分布式RLC子功能实体两个功能部分，C-RLC功能为新增功能，D-RLC功能为现有RLC功能保持不变，发送数据时C-RLC直接把数据发送给D-RLC，接收数据时D-RLC直接把数据发送给C-RLC，二者之间不需要交互数据流控的信息，通过开环填鸭式的方式发送和接收数据。能够兼容非连续传输带来的时延；具有很好的扩展性，能够快速支撑海量用户。

Claims (11)

  1. 一种无线链路控制RLC功能实体处理数据的方法，将RLC功能实体划分为集中式RLC子功能实体和分布式RLC子功能实体；所述方法包括：
    所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据；
    所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给分组数据汇聚协议PDCP功能实体。
  2. 根据权利要求1所述的无线链路控制RLC功能实体处理数据的方法，其中，所述集中式RLC子功能实体向所述每个分布式RLC子功能实体发送第一数据，包括：
    所述集中式RLC子功能实体发送给所述每个分布式RLC子功能实体的业务数据单元SDU组成RLC SDU簇；
    所述集中式RLC子功能实体将所述RLC SDU簇内的RLC SDU按照接收顺序发送到所述每个分布式RLC子功能实体上。
  3. 根据权利要求1所述的无线链路控制RLC功能实体处理数据的方法，其中，所述集中式RLC子功能实体对所述第二数据进行排序，并将排序后的第二数据发送给分组数据汇聚协议PDCP功能实体，包括：
    所述集中式RLC子功能实体对RLC SDU簇内的RLC SDU进行排序，并将排序后的RLC SDU按序发送给PDCP功能实体。
  4. 根据权利要求1所述的无线链路控制RLC功能实体处理数据的方法，其中，所述每个分布式RLC子功能实体将接收到的第二数据发送给所述集中式RLC子功能实体，包括：
    所述每个分布式RLC子功能实体按序接收第二数据，并对所述第二数据进行重组后按序将重组后的第二数据发送给所述集中式RLC子功能实 体。
  5. 根据权利要求1至4任一项所述的无线链路控制RLC功能实体处理数据的方法，其中，所述集中式RLC子功能实体包括以下至少之一：透明模式RLC功能实体、确认模式/非确认模式RLC发送实体、确认模式/非确认模式RLC接收实体。
  6. 一种无线链路控制RLC功能实体，所述功能实体包括：集中式RLC子功能实体和分布式RLC子功能实体；
    所述集中式RLC子功能实体，配置为向所述每个分布式RLC子功能实体发送第一数据；
    所述分布式RLC子功能实体，配置为将接收到的第二数据发送给所述集中式RLC子功能实体；
    所述集中式RLC子功能实体，还配置为对所述分布式RLC子功能实体发送的第二数据进行排序，并将排序后的第二数据发送给PDCP功能实体。
  7. 根据权利要求6所述的无线链路控制RLC功能实体，其中，所述集中式RLC子功能实体发送给每个所述分布式RLC子功能实体的SDU组成RLC SDU簇；
    所述集中式RLC子功能实体，还配置为将所述RLC SDU簇内的RLCSDU按照接收顺序发送到每个所述分布式RLC子功能实体上。
  8. 根据权利要求7所述的无线链路控制RLC功能实体，其中，所述集中式RLC子功能实体，还配置为对RLC SDU簇内的RLC SDU进行排序，并将排序后的RLC SDU按序发送给PDCP功能实体。
  9. 根据权利要求6所述的无线链路控制RLC功能实体，其中，所述分布式RLC子功能实体，还配置为按序接收第二数据，并对所述第二数据进行重组后按序将重组后的第二数据发送给所述集中式RLC子功能实体。
  10. 根据权利要求6至9任一项所述的无线链路控制RLC功能实体， 其中，所述集中式RLC子功能实体包括以下至少之一：透明模式RLC功能实体、确认模式/非确认模式RLC发送实体、确认模式/非确认模式RLC接收实体。
  11. 一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为当处理器运行所述计算机程序时，执行权利要求1至5任一项所述的无线链路控制RLC功能实体处理数据的方法。
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