CN108632899A

CN108632899A - A kind of data transmission method, data transmitting equipment and data receiver

Info

Publication number: CN108632899A
Application number: CN201710161099.7A
Authority: CN
Inventors: 王宏; 权威; 张戬
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-17
Filing date: 2017-03-17
Publication date: 2018-10-09
Anticipated expiration: 2037-03-17
Also published as: WO2018166517A1; CN108632899B

Abstract

A kind of data transmission method, data transmitting equipment and data receiver improve data transmission efficiency to reduce the header overhead of data packet.In the data transmission method, the wireless spread-spectrum technology RLC entities of data sending terminal receive the PDCP protocol Data Units PDU that the Packet Data Convergence Protocol PDCP entities of data sending terminal are sent, and generate corresponding RLC PDU according to the PDCP PDU, wherein, PDCP PDU and RLC PDU include the sequence number of PDCP entities distribution；The RLC entities of data sending terminal send the RLC PDU to the RLC entities of data receiver；The wireless spread-spectrum technology RLC entities of data receiver receive the rlc protocol data cell PDU that the RLC entities of data sending terminal are sent；The RLC entities of the data receiver carry out duplicate packages detection or data packet sequencing using sequence number.

Description

A kind of data transmission method, data transmitting equipment and data receiver

Technical field

This application involves a kind of field of communication technology more particularly to data transmission method, data transmitting equipment and data to connect Receiving unit.

Background technology

During data are wirelessly transferred, user face data is with iso-ip Internetworking protocol ISO-IP (Internet Protocol, IP) Data packet format, via packet data polymerized (Packet Data Convergence Protocol, PDCP) layer, Radio Link Control (Radio link Control, RLC) layer, MAC (Media Access Control, media access control) layers and physics (Physical, PHY) layer, is transmitted between data sending terminal and data receiver.

Currently, the operating mode carried out data transmission in rlc layer include mainly transparent mode (Transparent Mode, TM), non-answer-mode (Unacknowledged Mode, UM) and answer-mode (Acknowledged Mode, AM).Wherein, Under TM patterns, data that PDCP layers or MAC layer are sent directly are delivered to MAC layer or PDCP layers rlc layer is without any processing.UM Under pattern, the data packet transmitted is not fed back.Under AM patterns, the data of transmission have corresponding feedback information to come from opposite end. Under UM and AM patterns, the PDCP layers of data for being delivered to MAC layer can be segmented by rlc layer, cascaded, and MAC layer is delivered to PDCP layers of data can be recombinated by rlc layer, be reordered, repeating to detect, and distributing corresponding sequence number (Sequence Number, SN) to distinguish different rlc protocol data cell (Protocol Data Unit, PDU).

However, with the development of the communication technology, carry out data transmission may not be needed to cascade data in rlc layer, For example, in the 5th generation communication system (5G), RLC entities no longer carry out the cascade of data.In such cases, if continuing in RLC Floor is added No. SN, can increase the header overhead of data packet, influence data transmission efficiency.

Invention content

A kind of data transmission method of the embodiment of the present application offer, data transmitting equipment and data receiver, to reduce number According to the header overhead of packet, data transmission efficiency is improved.

In a first aspect, a kind of data transmission method is provided, and in the data transmission method, the PDCP entities of data sending terminal PDCP PDU are sent to the RLC entities of data sending terminal, the RLC entities of data sending terminal receive the PDCP entities of data sending terminal The PDCP PDU of transmission, and corresponding RLC PDU are generated according to the PDCP PDU, PDCP PDU and RLC PDU use PDCP The sequence number of entity distribution.The RLC entities of data sending terminal send RLC PDU to the RLC entities of data receiver.Data receiver The RLC entities at end receive the RLC PDU that the RLC entities of data sending terminal are sent, and using sequence number carry out duplicate packages detection or Data packet sequencing.The RLC entities of data receiver send RLC SDU to the PDCP entities of data receiver, can reduce data Redundancy in transmission process improves data transmission efficiency.

In a kind of possible design, the PDCP data PDU and PDCP controls PDU include sequence number SN, if institute It is complete RLC PDU to state RLC PDU, then does not include sequence number SN in the RLC PDU, if the RLC PDU are segmentation RLC PDU includes then sequence number SN in the RLC PDU.The RLC entities of the data receiver using the PDCP data PDU and The sequence number SN for including in the PDCP controls PDU carries out duplicate packages detection or data packet sequencing, if the RLC PDU are segmentation RLC PDU, then the RLC entities of the data receiver use the sequence number SN for including in the RLC PDU to carry out duplicate packages inspection It surveys or data packet sequencing is not included the sequence number SN of RLC entities distribution in RLC PDU, can be reduced number using such design According to the redundancy of RLC PDU in transmission process, data transmission efficiency is improved.

In alternatively possible design, the PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include Sequence number SN, the PDCP data PDU corresponding RLC PDU, it is described if the RLC PDU are complete RLC PDU Sequence number SN is not included in RLC PDU, the RLC entities of the data receiver use the sequence for including in the PDCP data PDU Row number SN carries out duplicate packages detection or data packet sequencing.If the RLC PDU are to be wrapped in segmentation RLC PDU, the RLC PDU SN containing sequence number；The PDCP controls the corresponding RLC PDU of PDU and does not include sequence number SN；The RLC of the data receiver Entity carries out duplicate packages detection or data packet sequencing using the sequence number SN for including in the RLC PDU.Using such design, The sequence number SN for not including the distribution of RLC entities in RLC PDU, can reduce the redundancy of RLC PDU in data transmission procedure, Improve data transmission efficiency.

In another possible design, the PDCP data PDU and PDCP controls PDU do not include sequence number SN, The corresponding RLC PDU of the PDCP data PDU include sequence number SN；The PDCP controls the corresponding RLC PDU of PDU Not comprising sequence number SN.Using such design, do not include sequence number SN in PDCP PDU, includes PDCP entities in RLC PDU The sequence number SN of distribution can reduce the redundancy of PDCP PDU datas packet in data transmission procedure, improve data transmission effect Rate.

In another possible design, if the PDCP data PDU includes sequence number SN, the PDCP control, PDU is not wrapped SN containing the sequence number or PDCP data PDU and PDCP controls PDU does not include sequence number SN, then the RLC PDU In comprising the PDCP PDU are used to indicate be the bit that PDCP controls PDU or PDCP data PDU, the data receiver RLC entities send the first instruction information to the PDCP entities of data receiver, and the first instruction information is used to indicate described PDCP PDU are that PDCP controls PDU or PDCP data PDU, so that the RLC entities of data receiver determine the need for parsing PDCP sequence numbers, in the case where it is PDCP data PDU to determine PDCP PDU, the PDCP that PDCP data PDU includes is read in parsing Sequence number reads PDCP sequence numbers in the case where it is that PDCP controls PDU to determine PDCP PDU without parsing.

In alternatively possible design, the RLC entities include the first RLC entities and the 2nd RLC entities, and the first RLC is real Body and the 2nd RLC entities belong to identical or different data sending terminal.If the PDCP entities of data sending terminal are to described One RLC entities and the 2nd RLC entities send PDCP PDU, then the RLC PDU also include instruction information, the instruction letter Breath is the bit for being used to indicate whether to exist interval GAP；Wherein, there are GAP to characterize the first RLC entities and described second The PDCP PDU that RLC entities receive are discrete, characterize the first RLC entities there is no GAP and the 2nd RLC is real The PDCP PDU that body receives are continuous；If the instruction information instruction is there are GAP bits, the RLC PDU are also wrapped Value containing GAP, the GAP values are used to indicate the GAP numerical value between two that same RLC entities receive adjacent PDCP PDU, with In the case of avoiding dual link, the RLC entities of data receiver are fed back in the case where that need not be fed back.

In another possible design, the RLC PDU also include interval GAP values, and the GAP values are used to indicate described GAP numerical value between two adjacent PDCP PDU that RLC entities receive, in the case of avoiding dual link, the RLC of data receiver Entity is fed back in the case where that need not be fed back.

In another possible design, the RLC entities of the data sending terminal receive the PDCP entities hair of data sending terminal After the PDCP PDU sent, the RLC entities of the data sending terminal receive the institute that the PDCP entities of the data sending terminal are sent The associated SN of PDCP PDU are stated, the RLC entities of the data receiver are to described in the transmission of the PDCP entities of the data receiver The corresponding sequence number SN of PDCP data PDU are wrapped so that the RLC entities of data sending terminal can be determined accurately in segmentation RLC PDU The value of the PDCP sequence numbers contained.

In another possible design, the RLC entities of the data sending terminal are according to PDCP PDU datas generation pair Before the RLC PDU answered, the RLC entities of the data sending terminal receive the first of the PDCP entities transmission of the data sending terminal Indicate information, it is the instruction that PDCP controls PDU or PDCP data PDU that the first instruction information, which is used to indicate the PDCP PDU, Information so that the RLC entities of data sending terminal can the accurate identification RLC PDU PDCP PDU that include be PDCP controls PDU also It is PDCP data PDU.

Second aspect provides a kind of data transmitting equipment, which, which has, realizes number in above method design According to the function of RLC entities in transmitting terminal, the function can also execute corresponding software by hardware realization by hardware It realizes.The hardware or software include one or more modules corresponding with above-mentioned function.The module can be software and/ Or hardware.

In a kind of possible design, the data transmitting equipment includes receiving unit, processing unit and transmission unit, is received The function of unit, processing unit and transmission unit can be corresponding with various method steps, the data format and PDCP of RLC PDU The data format of PDU is also identical as the format involved in the above method, and it will not be described here.

In alternatively possible design, the data transmitting equipment includes processor, memory, receiver and transmitter, Wherein, can be connected by bus system between processor, memory, receiver and transmitter.The memory is for storing journey Sequence, the processor is used to execute the program in the memory, to execute the arbitrary possibility of first aspect or first aspect Design in data sending terminal RLC entities execute method.

The third aspect provides a kind of data receiver, which, which has, realizes number in above method design According to the function of RLC entities in receiving terminal, the function can also execute corresponding software by hardware realization by hardware It realizes.The hardware or software include one or more modules corresponding with above-mentioned function.The module can be software and/ Or hardware.

In a kind of possible design, the data receiver includes receiving unit and processing unit, may also comprise transmission The function of unit, receiving unit, processing unit and transmission unit can be corresponding with various method steps, the data lattice of RLC PDU Formula is also identical as the format involved in the above method as the data format of PDCP PDU, and it will not be described here.

In alternatively possible design, the data receiver includes processor, memory, receiver and transmitter, Wherein, can be connected by bus system between processor, memory, receiver and transmitter.The memory is for storing journey Sequence, the processor is used to execute the program in the memory, to execute the arbitrary possibility of first aspect or first aspect Design in data receiver RLC entities execute method.

Fourth aspect, the embodiment of the present application provide a kind of communication system, which includes described in second aspect Data receiver described in data transmitting equipment and the third aspect.

5th aspect, the application put forward embodiment and have supplied a kind of computer readable storage medium or computer program product, For storing computer program, the computer program is for executing in the arbitrarily possible design of first aspect and first aspect Method.

Data transmission method provided by the present application, data receiver and data transmitting equipment carry out data transmission process In, what PDCP PDU and RLC entity that PDCP entities generate was distributed according to the PDCP PDU RLC PDU generated using PDCP entities Sequence number can reduce the redundancy in data transmission procedure, improve data transmission efficiency.

Description of the drawings

Fig. 1 is the wireless communication system architecture figure of data transmission method provided by the embodiments of the present application application；

Fig. 2 is the transmission process schematic diagram of data sending terminal and data receiver transmission data in wireless communication system；

Fig. 3 is a kind of flow diagram of data transmission method provided by the embodiments of the present application；

Fig. 4 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram one；

Fig. 5 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram two；

Fig. 6 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram three；

Fig. 7 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram four；

Fig. 8 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram five；

Fig. 9 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram six；

Figure 10 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram seven；

Figure 11 is that the PDCP provided by the embodiments of the present application comprising sequence number controls PDU data packet form schematic diagram eight；

Figure 12 is the RLC PDU data packets form schematic diagram one provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 13 is the RLC PDU data packets form schematic diagram two provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 14 is the RLC PDU data packets form schematic diagram three provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 15 is the RLC PDU data packets form schematic diagram four provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 16 is the RLC PDU data packets form schematic diagram five provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 17 is another flow diagram of data transmission method provided by the embodiments of the present application；

Figure 18 is another flow diagram of data transmission method provided by the embodiments of the present application；

Figure 19 is the schematic diagram that PDCP entities provided by the embodiments of the present application send PDCP PDU by dual link；

Figure 20 is the RLC PDU data packets form schematic diagram six provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 21 is the RLC PDU data packets form schematic diagram seven provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 22 is the RLC PDU data packets form schematic diagram eight provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 23 is the RLC PDU data packets form schematic diagram nine provided by the embodiments of the present application not comprising RLC sequence numbers；

Figure 24 is the PDCP data PDU data packet form schematic diagrams provided by the embodiments of the present application not comprising PDCP sequence numbers One；

Figure 25 is the PDCP data PDU data packet form schematic diagrams provided by the embodiments of the present application not comprising PDCP sequence numbers Two；

Figure 26 is that the PDCP provided by the embodiments of the present application not comprising sequence number controls PDU data packet form schematic diagram one；

Figure 27 is that the PDCP provided by the embodiments of the present application not comprising sequence number controls PDU data packet form schematic diagram two；

Figure 28 is the RLC PDU data packets form schematic diagram one provided by the embodiments of the present application comprising PDCP sequence numbers；

Figure 29 is the RLC PDU data packets form schematic diagram two provided by the embodiments of the present application comprising PDCP sequence numbers；

Figure 30 is a kind of structural schematic diagram of data transmitting equipment provided by the embodiments of the present application；

Figure 31 is the structural schematic diagram of another data transmitting equipment provided by the embodiments of the present application；

Figure 32 is a kind of structural schematic diagram of data receiver provided by the embodiments of the present application；

Figure 33 is the structural schematic diagram of another data receiver provided by the embodiments of the present application.

Specific implementation mode

Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.

Data transmission method provided by the embodiments of the present application can be applied to the data transmission of wireless communication system, wherein number According to receiving terminal and data sending terminal by wireless access network (Radio Access Network, RAN) and core net into line number According to interaction.Such as shown in Fig. 1, data interaction is carried out between terminals in wireless communication systems and the network equipment, terminal is by eating dishes without rice or wine It is linked into RAN, and the network equipment is connected to via core net, wherein the network between terminal and RAN can be described as wireless network, Network between RAN and the network equipment can be described as cable network.TCP connection is established between the network equipment and terminal and carries out data Transmission.

It is understood that wireless communication system, is a kind of network providing wireless communication function.Wireless communication system can To use the different communication technologys, such as CDMA (code division multiple access, CDMA), broadband code Divide multiple access (wideband code division multiple access, WCDMA), time division multiple acess (time division Multiple access, TDMA), it is frequency division multiple access (frequency division multiple access, FDMA), orthogonal Frequency division multiple access (orthogonal frequency-division multiple access, OFDMA), single-carrier frequency division multiple access (single Carrier FDMA, SC-FDMA), Carrier Sense Multiple Access/conflict avoidance (Carrier Sense Multiple Access with Collision Avoidance).According to factors such as the capacity of heterogeneous networks, rate, time delays Network can be divided into 2G (English：Generation) network, 3G network, 4G networks or future evolution network, such as 5G networks. Typical 2G networks include global system for mobile communications (global system for mobile communications/ General packet radio service, GSM) network or General Packet Radio Service (general packet Radio service, GPRS) network, typical 3G network includes Universal Mobile Communication System (universal mobile Telecommunications system, UMTS) network, typical 4G networks include long term evolution (long term Evolution, LTE) network.Wherein, UMTS network is referred to as universal land radio access web (universal sometimes Terrestrial radio access network, UTRAN), LTE network be referred to as sometimes Evolved Universal Terrestrial without Line access (evolved universal terrestrial radio access network, E-UTRAN).According to resource The difference of the method for salary distribution can be divided into cellular communications networks and Wireless LAN (wireless local area Networks, WLAN), wherein cellular communications networks are that scheduling is leading, and WLAN is that competition is leading.2G, 3G and 4G net above-mentioned Network is cellular communications networks.Those skilled in the art are, it should be understood that technical side provided in an embodiment of the present invention with the development of technology Case can be applied equally to other cordless communication networks, such as 4.5G 5G networks or other non-cellular communication networks.

It is understood that the network equipment involved in Fig. 1, can be referred to as wireless access network (Radio Access Network, RAN) equipment is a kind of equipment that terminal is linked into wireless network, including but not limited to：Evolved node B (evolved Node B, eNB), radio network controller (Radio Network Controller, RNC), node B (Node B, NB), base station controller (Base Station Controller, BSC), base transceiver station (Base Transceiver Station, BTS), Home eNodeB (for example, Home evolved NodeB or Home Node B, HNB), Base Band Unit (BaseBand Unit, BBU), Wireless Fidelity (Wireless Fidelity, WIFI) access point (Access Point, AP), Transfer point (transmission and receiver point, TRP transmission point, TP) etc..In Fig. 1 The terminal being related to is a kind of equipment providing a user voice and/or data connectivity, may include it is various have wireless communication The handheld device of function, mobile unit, wearable device, computing device are connected to other processing of radio modem and set Standby and various forms of user equipmenies (User Equipment, UE), mobile station (Mobile station, MS), terminal is set Standby (Terminal Equipment), transfer point (transmission and receiver point, TRP or Transmission point, TP) etc..

Fig. 2 show data sending terminal and the transmission process of data receiver transmission data in wireless communication system and illustrates Figure.When data sending terminal is to data receiver transmission data in wireless communication system, data are gone out by the application layer of data sending terminal Hair, after the PDCP layers of data sending terminal, rlc layer, MAC layer and PHY layer, via the PHY of transmission link to data receiver Layer finally reaches the application layer of data receiver via the MAC layer of data receiver, rlc layer and PDCP layer.Wireless communication system In system transmission process from data receiver to data sending terminal transmission data, with data sending terminal to data receiver transmission data Transmission process on the contrary, details are not described herein.

Wherein it is possible to understand be in Fig. 2 PDCP layer or more be application layer be only to be schematically illustrated, do not regard it as It limits, such as PDCP layers or more can also be wireless heterogeneous networks (Radio Resource Control, RRC) signaling.

Each layer protocol is executed by the entity of respective layer in data transmission procedure, in order to make it easy to understand, real below the application It applies in example and the entity for executing rlc layer agreement is known as RLC entities, RLC entities belong to rlc layer, corresponding with rlc layer.Execute PDCP The entity of layer protocol is known as PDCP entities, and PDCP entities belong to PDCP layers, corresponding with PDCP layers.It is description in the embodiment of the present application It is convenient, during carrying out data transmission between each protocol entity unit, the association between two protocol entity units may be omitted The processing procedure description of layer is discussed, such as：Data are carried out between the RLC entities of data sending terminal and the RLC entities of data receiver When transmission, the processing procedure description of the MAC/PHY layers of data receiver and data sending terminal is omitted.

Fig. 3 show a kind of data transmission method flow chart provided by the embodiments of the present application, as shown in fig.3, including：

S101：The PDCP entities of data sending terminal send PDCP PDU to the RLC entities of data sending terminal.

Wherein, the PDCP PDU include PDCP data PDU and PDCP control PDU.

S102：The RLC entities of data sending terminal receive the PDCP PDU that the PDCP entities of data sending terminal are sent, and foundation The PDCP PDU generate corresponding RLC PDU.

Wherein, the sequence number that PDCP PDU and RLC PDU include is distributed by PDCP entities, and data receiver can be used should Sequence number carries out duplicate packages detection or data packet sequencing.

S103：The RLC entities of data sending terminal send RLC PDU to the RLC entities of data receiver.

S104：The RLC entities of data receiver receive the RLC PDU that the RLC entities of data sending terminal are sent, and use sequence Row number carries out duplicate packages detection or data packet sequencing.

S105：The RLC entities of data receiver send RLC Service Data Units to the PDCP entities of data receiver (Service Data Units, SDU).

In the embodiment of the present application, the sequence number that PDCP PDU and RLC PDU include is distributed by PDCP entities, in other words, PDCP PDU and RLC PDU use PDCP sequence numbers, wherein RLC PDU can be understood as using the situation of PDCP sequence numbers RLC PDU do not include the situation of RLC sequence numbers.

For convenience of description, the sequence number distributed by PDCP entities is known as PDCP sequence numbers below, will be distributed by RLC entities Sequence number be known as RLC sequence numbers.

Wherein, when PDCP PDU and RLC PDU use PDCP sequence numbers, PDCP data PDU includes the distribution of PDCP entities PDCP sequence numbers, PDCP, which controls PDU, to include PDCP sequence numbers, can not also include PDCP sequence numbers.For PDCP data The case where PDU and PDCP controls PDU includes PDCP sequence numbers, if RLC PDU are complete RLC PDU, in the RLC PDU Not comprising PDCP sequence numbers.If it includes PDCP sequence numbers that RLC PDU, which are in segmentation RLC PDU, RLC PDU,.For PDCP numbers Include the case where sequence number SN, PDCP control PDU does not include sequence number SN, institute corresponding for the PDCP data PDU according to PDU RLC PDU are stated, if the RLC PDU are complete RLC PDU, sequence number SN are not included in the RLC PDU, if the RLC PDU is segmentation RLC PDU, then includes sequence number SN in the RLC PDU；The RLC corresponding for PDCP controls PDU PDU does not include sequence number SN.

The embodiment of the present application, PDCP data PDU and PDCP controls PDU include PDCP sequence numbers, PDCP data PDU Data packet format can be used at present existing PDCP PDU datas packet format, details are not described herein, below to PDCP control PDU It is illustrated with the format of RLC PDU.

PDCP, which controls PDU, can use data packet format shown in Fig. 4, and in Fig. 4, it includes sequence number SN that PDCP, which controls PDU,. It is PDCP data PDU or PDCP control that wherein the domain data/control (Data/Control, D/C), which is used to indicate the PDCP PDU, PDU indicates that the PDCP PDU are that PDCP controls PDU herein.The domain PDU types (PDU Type) is used to indicate PDCP controls PDU's The data of type, the corresponding domains Data of different PDU types are different.Reserved bit position (R) indicates that the bit is vacant Bit is reserved for future use.SN is sequence number.Data is data.Here, to PDU Type, reserved bit position, SN, Data Length, and the sequence etc. of same area is not all not construed as limiting, only a kind of illustrative explanation in Fig. 4.

Specifically, it can be Header compression (Robust Header Compression, ROHC) feedback that PDCP, which controls PDU, Data packet PDCP controls PDU, can also be state report PDCP controls PDU.Wherein, when the length of PDCP sequence numbers is respectively When 7bits, 12bits, 15bits, 18bits, the ROHC feedback data packets PDCP controls PDU for including PDCP sequence numbers may Data packet format as shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8.In Fig. 5 to Fig. 8, ROHC feedback packet feed back for ROHC Information.Wherein, when the length of SN is respectively 12bits, when 15bits, 18bits, its is possible by state report PDCP controls PDU Data packet format is as shown in Fig. 9, Figure 10 and Figure 11, in Fig. 9 to Figure 11, the sequence number (First of first lost data packets Missing SN, FMS) sequence number of sequence number minimum, bitmap in the data packet currently lost of designation date receiving terminal (Bitmap) it indicates since next sequence number of FMS, which data packet is properly received, which data packet is not successfully received.

It is understood that the length in domain (field) and not in data packet format involved in all embodiments of the application Sequence of the same area in data packet format is all not construed as limiting.In addition, in data packet format involved in all embodiments of the application It is overseas except what is provided in the application, it is also possible to comprising the domain for other functions, to be not limited thereto.

In the case where PDCP data PDU and PDCP controls PDU includes PDCP sequence numbers, RLC PDU are possible Structure is as follows：

If the RLC entities of data sending terminal need not be segmented RLC SDU, RLC PDU are complete RLC PDU, then The complete RLC PDU do not include PDCP sequence numbers, as shown in figure 12.Figure 12 is complete RLC PDU provided by the embodiments of the present application A kind of form schematic diagram.In Figure 12, it is RLC numbers that the domain data/control (Data/Control, D/C), which is used to indicate the RLC PDU, PDU is controlled according to PDU or RLC.The domain segment identification (Segmentation Flag, SF) be used to indicate include in RLC PDU be The PDCP PDU that complete PDCP PDU are still segmented, if including complete PDCP PDU, the RLC PDU are referred to as complete Otherwise RLC PDU are referred to as segmented RLC PDU, such as SF=0 herein, expression is not segmented PDCP PDU, are complete RLC PDU.Poll bit (Polling bit, P), is used to indicate whether to need opposite end condition report feedback.Reserved bit position (R), refers to Show that the bit is vacant bit.The domain data field length (Length, L) is used to indicate the length of data field (Data).In addition, The domains L are optional.The domain data (Data) is a part of RLC SDU or RLC SDU.The RLC entities of data sending terminal are using figure Data packet format shown in 12 sends complete RLC PDU, and the RLC entities of data receiver receive the RLC realities of data sending terminal The complete RLC PDU that body is sent parse SF=0, then the RLC entities of data receiver read the PDCP data PDU and described The PDCP sequence numbers for including in PDCP controls PDU, and use the PDCP data PDU read and PDCP controls PDU In include PDCP sequence numbers, carry out duplicate packages detection or data packet sequencing or feedback.

PDCP data PDU and PDCP controls PDU includes PDCP sequence numbers, if the RLC entities of data sending terminal need RLC SDU are segmented, which is segmentation RLC PDU, then segmentation RLC PDU include PDCP sequence numbers, and are wrapped Fragment Offset (segment offset, SO) is included, SO is used to indicate segmentation RLC PDU datas part first character section not The position of data portion in RLC SDU before segmentation, as shown in figure 13.Figure 13 is segmentation RLC provided by the embodiments of the present application A kind of form schematic diagram of PDU, the length of SN and the length of SO are not construed as limiting, and the domains L are optional, and each domain can have different suitable Sequence.In Figure 13, D/C, P, L and R etc. are identical as Figure 12, and details are not described herein.In Figure 13, SF values are 1, are used to indicate RLC PDU is segmentation RLC PDU.Last segment identification (last segment flag, LSF), is used to indicate in segmentation RLC PDU Data portion the last byte whether be data in RLC PDU before unsegmented the last byte.The value of SN is The value of the PDCP sequence numbers of PDCP entities distribution, SO are segmentation RLC PDU datas part first character section before unsegmented RLC PDU in data portion position.The RLC entities of data sending terminal send segmentation using data packet format shown in Figure 13 The RLC entities of RLC PDU, data receiver receive the segmentation RLC PDU that the RLC entities of data sending terminal are sent, and parse SF =1, then the RLC entities of data receiver read the PDCP sequence numbers that segmentation RLC PDU include, and to including identical PDCP sequences The segmentation RLC PDU of row number are recombinated, and to generate complete PDCP PDU, and are used and are wrapped in the segmentation RLC PDU read The PDCP sequence numbers contained carry out duplicate packages detection or data packet sequencing or feedback.

Include PDCP sequence numbers for PDCP data PDU, PDCP controls the situation that PDU does not include PDCP sequence numbers, PDCP Data PDU and PDCP control PDU can continue to use corresponding packet structure in the prior art.The packet structure of RLC PDU It is as follows：

If the RLC PDU that the RLC entities of data sending terminal generate are corresponding with the PDCP data PDU, and are complete RLC PDU does not include PDCP sequence numbers then in the RLC PDU.If the RLC PDU that the RLC entities of data sending terminal generate with it is described PDCP data PDU is corresponded to, and is segmentation RLC PDU, then includes PDCP sequence numbers in the RLC PDU.The RLC of data sending terminal If the RLC PDU that entity generates are corresponding with PDCP control PDU, sequence number SN is not included since PDCP controls PDU, then the RLC PDU does not include sequence number SN.As it can be seen that for the corresponding RLC of PDCP data PDU corresponding complete RLC PDU and PDCP controls PDU PDU, they all do not include sequence number SN, but unlike, the RLC entities of receiving terminal are corresponding complete in parsing PDCP data PDU When whole RLC PDU, need to read the PDCP sequence numbers for including in PDCP data PDU, and it is corresponding in parsing PDCP controls PDU When RLC PDU, the PDCP sequence numbers of PDCP controls PDU need not be read, because PDCP controls PDU does not include PDCP sequence numbers. So, it is that PDCP data PDU is corresponding or PDCP that the RLC entities of transmitting terminal, which need to mark above two RLC PDU, It is corresponding to control PDU.On the other hand, PDCP controls PDU when being segmented, it is only necessary to include the domains SO, need not include SN, because PDCP controls PDU does not include SN, RLC entities can not reuse the SN of PDCP controls PDU, and therefore, it is necessary to transmitting terminals It is that PDCP data PDU is corresponding or PDCP controls PDU is corresponding that RLC entity indicias, which go out above-mentioned RLC PDU,.Therefore the application is real If it includes that sequence number SN, the PDCP control PDU do not include sequence number SN, the RLC to apply the PDCP data PDU in example It may include that it is the bit that PDCP controls PDU or PDCP data PDU to be used to indicate the corresponding PDCP PDU of RLC PDU in PDU Position is determining that PDCP PDU are PDCP data so that the RLC entities of data receiver determine the need for parsing PDCP sequence numbers In the case of PDU, the PDCP sequence numbers that PDCP data PDU includes are read in parsing, are determining that PDCP PDU are that PDCP controls PDU In the case of, read PDCP sequence numbers without parsing.

In the embodiment of the present application, including be used to indicate the corresponding PDCP PDU of RLC PDU be PDCP control PDU or The data packet format of the RLC PDU of the bit of PDCP data PDU can use in the structural schematic diagram shown in Figure 12 or Figure 13 One reserved bit position is the ratio that PDCP controls PDU or PDCP data PDU as the corresponding PDCP PDU of RLC PDU are used to indicate Special position, such as select second reserved bit position as being used to indicate RLC in Figure 14, in the structural schematic diagram shown in Figure 12 The corresponding PDCP PDU of PDU are the bits of PDCP control PDU or PDCP data PDU.In Figure 14, it is used to indicate RLC PDU couple The PDCP PDU answered are that the bit of PDCP control PDU or PDCP data PDU indicates that PD/C can use a bit table for PD/C To show, it is PDCP control PDU or PDCP data PDU that different values, which is used to indicate the corresponding PDCP PDU of RLC PDU, such as PD/C=0 can indicate that the corresponding PDCP PDU of RLC PDU are PDCP data PDU, PD/C=1 and can indicate that RLC PDU are corresponded to PDCP PDU be PDCP control PDU.Wherein, it is corresponding complete to can be used for PDCP data PDU for data packet format shown in Figure 14 The corresponding complete RLC PDU of RLC PDU and PDCP controls PDU, only the value in the domains PD/C is different.For PDU pairs of PDCP data The segmentation RLC PDU answered are as shown in figure 15, as shown in figure 16 for the corresponding segmentation RLC PDU of PDCP controls PDU.

In a kind of possible embodiment, the PDCP entities of data sending terminal can be to data sending terminal in the embodiment of the present application RLC entities send that be used to indicate PDCP PDU be the instruction information that PDCP controls PDU or PDCP data PDU so that data are sent out The RLC entities of sending end can the accurate identification RLC PDU PDCP PDU that include be PDCP control PDU or PDCP data PDU, tool Body realizes that process is seen shown in Figure 17.S201, S203, S204, S205 and S206 in data transmission method shown in Figure 17, with S101, S102, S103, S104 and S105 difference in Fig. 3 is identical, and details are not described herein, the difference is that：

S202：The PDCP entities of data sending terminal send the first instruction information, data hair to the RLC entities of data sending terminal The RLC entities of sending end receive the first instruction information that the PDCP entities of the data sending terminal are sent, the first instruction information It is that PDCP controls PDU or PDCP data PDU to be used to indicate the PDCP PDU.

S207：The RLC entities of data receiver send the first instruction information to the PDCP entities of data receiver, and described the It is that PDCP controls PDU or PDCP data PDU that one instruction information, which is used to indicate the PDCP PDU,.

In alternatively possible embodiment, the PDCP entities of data sending terminal can also be to the RLC entities of data sending terminal The associated PDCP sequence numbers of the PDCP PDU are sent, so that the RLC entities of data sending terminal can accurately determine segmentation RLC The value for the PDCP sequence numbers for including in PDU is implemented on the basis of the method that specific implementation process can be shown in Fig. 3, can also schemed Implement on the basis of method shown in 17.It is said for being implemented on the basis of the method shown in Figure 17 in the embodiment of the present application It is bright, refering to fig. 1 shown in 8.S301, S303, S304, S305, S306, S307 and S308 in data transmission method shown in Figure 18, Identical as S201, S202, S203, S204, S205, S206 and S207 difference in Fig. 2, details are not described herein, and difference exists In：

S302：The PDCP entities of data sending terminal can send the PDCP PDU associations to the RLC entities of data sending terminal PDCP sequence numbers, the RLC entities of data sending terminal receive the PDCP PDU that the PDCP entities of data sending terminal are sent and close The PDCP sequence numbers of connection.

S309：The RLC entities of data receiver send the PDCP PDU to the PDCP entities of the data receiver and close The PDCP sequence numbers of connection.

Wherein, S309 is optional step, if for example, PDCP PDU include sequence number, PDCP entities can be directly read The sequence number of PDCP PDU is sent without RLC entities to PDCP entities.

The RLC PDU formats of the above-mentioned offer of the embodiment of the present application are applicable to the situation of single-link, that is, are suitable for data and send out The PDCP entities of one logic channel of sending end send the PDCP PDU generated to a RLC entity.For the situation of dual link, I.e. the PDCP entities of a logic channel of data sending terminal send the PDCP PDU generated to two RLC entities, for description side Just two RLC entities are referred to as the first RLC entities and the 2nd RLC entities.Figure 19 show PDCP entities and passes through dual link Sending the schematic diagram of PDCP PDU, wherein there are five PDCP PDU for a PDCP entity of data sending terminal by both links, It is sent respectively to the first RLC entities and the 2nd RLC entities of data sending terminal, wherein PDCP PDU1, PDCP PDU 3, PDCP PDU 4 is sent to the first RLC entities of data receiver, PDCP PDU2, PDCP by the first RLC entities of data sending terminal PDU 5 is sent to the 2nd RLC entities of data receiver by the 2nd RLC entities of data sending terminal.Under AM patterns, data receiver The first RLC entities and the 2nd RLC entities at end need the case where receiving RLC PDU to respective chain road to feed back, if but First RLC entities of data sending terminal and the 2nd RLC entities do not give RLC PDU assigned sequences number, the sequence which includes Row number is PDCP sequence numbers, the then RLC that the first RLC entities of data receiver and the 2nd RLC entities can be made to be respectively received The sequence number of PDU is discontinuous, such as the first RLC entities of data receiver are received sequentially PDCP PDU1, PDCP PDU 3, do not receive PDCP PDU2, the first RLC entities needs of data receiver can be fed back, however PDCP PDU2 be by What the 2nd RLC entities of data receiver received, such situation, the first RLC entities of data receiver really need not be into Row feedback.

The embodiment of the present application is in the case of avoiding dual link, and the RLC entities of data receiver need not fed back In the case of fed back, in a kind of possible embodiment, can be arranged in RLC PDU and be used to indicate whether there is interval (GAP) instruction information, wherein there are GAP to characterize the PDCP that the first RLC entities and the 2nd RLC entities receive PDU is discrete, characterizes the PDCP PDU that the first RLC entities and the 2nd RLC entities receive there is no GAP and is Continuously.

Wherein, indicate whether GAP instruction information can by RLC PDU data packet formats be arranged bit come It realizes, such as one bit of setting is referred to as the instruction information for indicating whether GAP by the different values of the bit Show and whether there is GAP.For example, setting G bits, if G=0, it indicates that GAP is not present, if G=1, it indicates that there are GAP.If The instruction information instruction also includes GAP values there are GAP, then the RLC PDU, and the GAP values are used to indicate same RLC entities GAP numerical value between the two adjacent PDCP PDU received.If GAP bits, nothing is not present in the instruction information instruction It is 0 or 1 that GAP values or setting GAP values, which need to be arranged,.

If the PDCP entities of data sending terminal continuously transmit PDCP PDU to the RLC entities of data sending terminal, and data are sent out For the RLC entities of sending end without being segmented to the RLC PDU of generation, RLC PDU are complete RLC PDU, the data packet of RLC PDU Form schematic diagram can be as shown in figure 20.In Figure 20, SF=0 indicates that RLC PDU are complete RLC PDU, and G=0 indicates that data are sent The PDCP PDU that the RLC entities at end receive are continuous.

If the PDCP entities of data sending terminal continuously transmit PDCP PDU to the RLC entities of data sending terminal, and data are sent out The RLC entities needs of sending end are segmented the RLC PDU of generation, and RLC PDU are the data packet for being segmented RLC PDU, RLC PDU Form schematic diagram can be as shown in figure 21.In Figure 21, SF=1 indicates that RLC PDU are segmentation RLC PDU, and G=0 indicates that data are sent The PDCP PDU that the RLC entities at end receive are continuous.

If the PDCP entities of data sending terminal discontinuously send PDCP PDU to the RLC entities of data sending terminal, and data For the RLC entities of transmitting terminal without being segmented to the RLC PDU of generation, RLC PDU are complete RLC PDU, the data of RLC PDU Packet form schematic diagram can be as shown in figure 22.In Figure 22, SF=0 indicates that RLC PDU are complete RLC PDU, and G=1 indicates data hair The PDCP PDU that the RLC entities of sending end receive are discrete, and there are GAP.In Figure 22, since there are GAP ratios for G=1 instructions Special position, then the RLC PDU also include GAP values, are indicated with Gap in Figure 22.Wherein, the value of Gap is what RLC entities received GAP numerical value between two adjacent PDCP PDU, for example, the first RLC entities of data sending terminal receive data hair in Figure 19 After the PDCP PDU1 that the PDCP entities of sending end are sent, and PDCP PDU3 are received, at this point, Figure 22 can be used in the first RLC entities Shown in RLC PDU data packet format analysis processing PDCP PDU3, G=1 indicates that the Gap values are used to indicate the first RLC there are Gap values Entity receives the PDCP PDU numbers not received between PDCP PDU3 and PDCP PDU1, such as PDCP PDU3 and PDCP The PDCP PDU numbers not received between PDU1 are 1, then Gap values are 1.In this way, the first RLC entities of data sending terminal are adopted The data packet format shown in Figure 22, after sending RLC PDU3 to the first RLC entities of data receiver, the of data receiver One RLC entities just can determine that between PDCP PDU3 and PDCP PDU1 there are one when receiving PDCP PDU3 not by data The PDCP PDU that first RLC entities of transmitting terminal are sent, and then can be not necessarily to be fed back.

If the PDCP entities of data sending terminal discontinuously send PDCP PDU to the RLC entities of data sending terminal, and data The RLC entities needs of transmitting terminal are segmented the RLC PDU of generation, and RLC PDU are the data for being segmented RLC PDU, RLC PDU Packet form schematic diagram can be as shown in figure 23.In Figure 23, SF=1 indicates that RLC PDU are segmentation RLC PDU, and G=1 indicates data hair The PDCP PDU that the RLC entities of sending end receive are discrete, there are GAP and include the Gap bits for characterizing GAP values.

The embodiment of the present application is in the case of avoiding dual link, and the RLC entities of data receiver need not fed back In the case of fed back, in alternatively possible embodiment, can also be not provided with indicating whether GAP's in RLC PDU It indicates information, but GAP values is set directly in RLC PDU, the GAP values are used to indicate two that the RLC entities receive GAP numerical value between a adjacent PDCP PDU, GAP is determined whether there is by GAP values, is not present if GAP numerical value is 0 GAP, there are GAP if GAP numerical value is non-zero, and the size of existing GAP is the GAP values.

It may also comprise and be used to indicate in data packet format comprising GAP values or GAP instruction information in the embodiment of the present application PDCP PDU are the bits of PDCP control PDU or PDCP data PDU, and concrete structure can be in the structure shown in Figure 20 to Figure 23 It selects a reserved bit position as the bit that PDCP PDU are PDCP control PDU or PDCP data PDU is used to indicate, is arranged It is used to indicate the process that PDCP PDU are the bits of PDCP control PDU or PDCP data PDU, is seen shown in Figure 14 to Figure 16 The embodiment of PD/C bits is set, and details are not described herein.

PDCP sequence numbers are not included below for PDCP PDU, RLC PDU include that the situation of PDCP sequence numbers illustrates.

Wherein, PDCP PDU do not include PDCP sequence numbers, and when RLC PDU include PDCP sequence numbers, PDCP entities are PDCP Data PDU distributes PDCP sequence numbers, and not controlling PDU for PDCP distributes PDCP sequence numbers, and PDCP data PDU and PDCP control PDU PDCP sequence numbers are not included, the corresponding PDCP sequence numbers of PDCP data PDU are indicated to RLC entities by PDCP entities, in this way, right Include PDCP sequence numbers in the corresponding RLC PDU of the PDCP data PDU；RLC PDU corresponding for PDCP controls PDU Not comprising PDCP sequence numbers, the data packet head expense of PDCP PDU can be reduced in this way.

Wherein, PDCP PDU do not include PDCP sequence numbers, and when RLC PDU include PDCP sequence numbers, PDCP entities are PDCP Data PDU and PDCP control PDU distributes PDCP sequence numbers, but PDCP data PDU and PDCP control PDU does not include PDCP sequences Row number, PDCP entities indicate the corresponding PDCP sequence numbers of PDCP data PDU and the corresponding PDCP sequence numbers of PDCP controls PDU RLC entities are given, in this way, including PDCP sequence numbers for the corresponding RLC PDU of the PDCP data PDU；The PDCP is controlled The corresponding RLC PDU of PDU processed also include PDCP sequence numbers.

In the embodiment of the present application, PDCP PDU include PDCP data PDU and PDCP control PDU, and PDCP data PDU can be used In the data of encapsulation user plane, the data of encapsulation signaling plane are can be used for.For convenience of description, it will be used to encapsulate user face data PDCP data PDU be known as user plane PDCP data PDU, the PDCP data PDU for encapsulating signaling face data is known as signaling Face PDCP data PDU.

The user plane that the PDCP entities of data sending terminal are sent to the RLC entities of data sending terminal in the embodiment of the present application PDCP data PDU and/or signaling plane PDCP data PDU does not include PDCP sequence numbers, does not include the signaling plane of PDCP sequence numbers The data packet format of PDCP data PDU is as shown in figure 24, and signaling plane PDCP data PDU shown in Figure 24 includes only data field (Data) and for integrity protection message authentication code (Message Authentication Code for Integrity, MAC-I).The data packet format of user plane PDCP data PDU not comprising PDCP sequence numbers is as shown in figure 25, shown in Figure 25 User plane PDCP data PDU includes only data field (Data).

The PDCP data that the PDCP entities of data sending terminal are sent to the RLC entities of data sending terminal in the embodiment of the present application PDU does not include PDCP sequence numbers, therefore the PDCP entities of data sending terminal can send the PDCP to the RLC entities of data sending terminal The associated PDCP sequence numbers of data PDU, the RLC entities of data sending terminal receive the described of the PDCP entities transmission of data sending terminal The associated PDCP sequence numbers of PDCP data PDU.The RLC entities that the RLC entities of data receiver receive data sending terminal are sent RLC PDU after parsing obtain the associated PDCP sequence numbers of PDCP data PDU, and to the PDCP of data receiver realities Body sends the associated PDCP sequence numbers of PDCP data PDU, so as to subsequent data reception end RLC entities using the association PDCP sequence numbers carry out duplicate packages detection or data packet sequencing, realize process refering to fig. 1 shown in 8.

In the embodiment of the present application, PDCP controls PDU can be ROHC feedback data packets PDCP control PDU, can also be envelope The PDCP for filling state report controls PDU.Wherein, the data packet format of ROHC feedback data packets PDCP controls PDU is as shown in figure 26, In Figure 26, the PDCP controls PDU of ROHC feedback data packets includes only ROHC feedback informations, PDU types and M reservation bit position (R), M is more than or equal to 0.The data packet format of the PDCP controls PDU of state report is as shown in figure 27, Tu27Zhong, state report It includes PDU types, first SN and N bit diagram for losing PDCP data PDU that PDCP, which controls PDU only, and N is more than or equal to 0.

In the embodiment of the present application, the PDCP entities of data sending terminal can send first to the RLC entities of data sending terminal and refer to Show information, the RLC entities of data sending terminal receive the first instruction information that the PDCP entities of the data sending terminal are sent, described It is that PDCP controls PDU or PDCP data PDU that first instruction information, which is used to indicate the PDCP PDU, and the RLC of data receiver is real Body receive data sending terminal RLC entities send RLC PDU after parsing obtain the first instruction information, data receiver RLC entities send the first instruction information to the PDCP entities of data receiver, and the first instruction information is used to indicate described PDCP PDU are that PDCP controls PDU or PDCP data PDU, and the RLC entities of data sending terminal include use in the RLC PDU of generation In indicating that the PDCP PDU are the bit that PDCP controls PDU or PDCP data PDU, without in PDCP data PDU and PDCP, which is controlled, is arranged D/C instructions field in PDU, the PDCP entities of data receiver just can determine that PDCP PDU are PDCP controls PDU or PDCP data PDU, specific implementation process are seen shown in Figure 17.

Include to be used to indicate the PDCP PDU to control PDU or PDCP data PDU for PDCP in the embodiment of the present application Bit, and include that the data packet format of the RLC PDU of RLC sequence numbers can be as shown in Figure 28 or 29, wherein Figure 28 is single The data packet format schematic diagram for the RLC PDU that RLC entities generate under links, wherein D/C, which is used to indicate the RLC PDU, is RLC data PDU or RLC control PDU, and SF=0 indicates that the RLC PDU are complete PDU, and G=0 indicates what RLC entities received PDCP PDU are continuous, GAP are not present, it is that PDCP controls PDU or PDCP data that PD/C, which is used to indicate the PDCP PDU, PDU, R are reserved bit position, and SN is PDCP sequence numbers.Figure 29 is the data for the RLC PDU that RLC entities generate under dual link situation Packet form schematic diagram, wherein Figure 29 and Figure 28 the difference is that, G=1 indicates that the PDCP PDU that RLC entities receive are non- Continuously, there are GAP, and include GAP values.

RLC PDU involved in the embodiment of the present application include that current RLC can be used in the data packet format of PDCP sequence numbers The data packet format of PDU or using with above-described embodiment be related to include PDCP sequence numbers RLC PDU data packet lattice The similar format of formula, therefore for the data packet format of RLC PDU, details are not described herein.

The transmission method of redundancy in reduction data transmission procedure provided by the present application, data receiver and data hair During sending end carries out data transmission, the RLC for PDCP PDU and RLC the entity foundation PDCP PDU generations that PDCP entities generate The sequence number that PDU is distributed using PDCP entities improves data transmission efficiency to reduce the redundancy in data transmission procedure.

The above-mentioned angle mainly interacted from data receiver and data sending terminal to scheme provided in an embodiment of the present invention into Introduction is gone.It is understood that data receiver and data sending terminal are in order to realize above-mentioned function, it is each it comprises executing The corresponding hardware configuration of function and/or software module.In conjunction with disclosed in this invention embodiment describe each exemplary unit And algorithm steps, the embodiment of the present invention can be realized with the combining form of hardware or hardware and computer software.Some function It executes in a manner of hardware or computer software driving hardware actually, depend on the specific application of technical solution and designs about Beam condition.Those skilled in the art can realize described function to each specific application using different methods, But this realization is it is not considered that exceed the range of the technical solution of the embodiment of the present invention.

The embodiment of the present invention can carry out functional unit according to above method example to data receiver and data sending terminal Division two or more functions can also be integrated for example, can correspond to each function divides each functional unit In a processing unit.The form that hardware had both may be used in above-mentioned integrated unit is realized, software function list can also be used The form of member is realized.It should be noted that being schematical, only a kind of logic to the division of unit in the embodiment of the present invention Function divides, formula that in actual implementation, there may be another division manner.

Using integrated unit, Figure 30 shows that a kind of structure of possible data transmitting equipment 100 is shown It is intended to.Data transmitting equipment 100 may include receiving unit 101, processing unit 102 and transmission unit 103, wherein receiving unit 101, the PDCP protocol Data Units that the Packet Data Convergence Protocol PDCP entities for receiving the data transmitting equipment are sent PDU.Processing unit 102, the PDCP PDU for being received according to the receiving unit 101 generate corresponding RLC PDU.Hair Unit 103 is sent, for sending the RLC PDU that the processing unit 102 generates to the RLC entities of data receiver.Wherein, institute It includes PDCP data PDU and PDCP control PDU to state PDCP PDU.The PDCP data PDU and PDCP controls PDU Sequence number SN does not include sequence number SN, if the RLC if the RLC PDU are complete RLC PDU in the RLC PDU PDU is segmentation RLC PDU, then includes sequence number SN in the RLC PDU.Alternatively, the PDCP data PDU includes sequence number SN, the PDCP control PDU and do not include sequence number SN, the corresponding RLC PDU of the PDCP data PDU, if the RLC PDU is complete RLC PDU, then does not include sequence number SN in the RLC PDU, if the RLC PDU are segmentation RLC PDU, Include sequence number SN in the RLC PDU；The PDCP controls the corresponding RLC PDU of PDU and does not include sequence number SN.Or It is corresponding described that person, the PDCP data PDU and PDCP controls PDU do not include sequence number SN, the PDCP data PDU RLC PDU include sequence number SN；The PDCP controls the corresponding RLC PDU of PDU and does not include sequence number SN.

In a kind of possible embodiment, if the PDCP data PDU include sequence number SN, the PDCP control PDU not Including the sequence number SN or PDCP data PDU and PDCP controls PDU does not include sequence number SN, the then RLC Include to be used to indicate the bit that the PDCP PDU are PDCP control PDU or PDCP data PDU in PDU.

In alternatively possible embodiment, the RLC entities include the first RLC entities and the 2nd RLC entities, first RLC entities and the 2nd RLC entities belong to identical or different data transmitting equipment.If the PDCP entities of data transmitting equipment PDCP PDU are sent to the first RLC entities and the 2nd RLC entities, then the RLC PDU also include instruction information, institute It is the bit for being used to indicate whether to exist interval GAP to state instruction information.Wherein, there are GAP characterize the first RLC entities and The PDCP PDU that the 2nd RLC entities receive are discrete, and there is no GAP to characterize the first RLC entities and described The PDCP PDU that 2nd RLC entities receive are continuous.If there are GAP bits, the RLC for the instruction information instruction PDU also includes GAP values, and the GAP values are used to indicate the GAP between two that same RLC entities receive adjacent PDCP PDU Numerical value.

In another possible embodiment, the RLC PDU also include interval GAP values, and the GAP values are used to indicate institute State the GAP numerical value between two that RLC entities receive adjacent PDCP PDU.

In another possible embodiment, the receiving unit 101 is additionally operable to：The PDCP for receiving data sending terminal is real After the PDCP PDU that body is sent, the associated SN of PDCP PDU that the PDCP entities of the data sending terminal are sent are received.

In another possible embodiment, the receiving unit 101 is additionally operable to：In the processing unit 102 according to institute Before stating the corresponding RLC PDU of PDCP PDU datas generation, the first finger that the PDCP entities of the data sending terminal are sent is received Show information, it is the instruction letter that PDCP controls PDU or PDCP data PDU that the first instruction information, which is used to indicate the PDCP PDU, Breath.

When being realized using example, in hardware, in the embodiment of the present invention, receiving unit 101 can be communication interface, receiver, Transmission circuit etc., processing unit 102 can be processor or controller.Transmission unit 103 can be communication interface, transmitter, Transmission circuit etc., wherein communication interface is to be referred to as, and may include one or more interfaces.

When the receiving unit 101 is receiver, processing unit 102 is processor, when transmission unit 103 is transmitter, Data transmitting equipment 100 involved by the embodiment of the present application can be data transmitting equipment shown in Figure 31.Wherein, described Figure 31 Shown in data transmitting equipment can be the network equipment.

Figure 31 show the schematic diagram of data transmitting equipment 1000 provided by the embodiments of the present application.The data transmitting equipment 1000 can be used for executing the execution method of the RLC entities of the data sending terminal involved in Fig. 3, Figure 17 or Figure 18.Such as Figure 31 institutes Show, the data transmitting equipment 1000 includes：Including processor 1001, memory 1002, receiver 1003 and transmitter 1004, Wherein, can be connected by bus system between processor 1001, memory 1002, receiver 1003 and transmitter 1004.Institute State memory 1002 for store include program, instruction or code.The processor 1001, for executing the memory 1002 In program, generate PDCP PDU and the RLC PDU with the data format involved in the above embodiment, and control and receive device 1003 and progress PDCP PDU and the RLC PDU's of transmitter 1004 sends and receivees, and implements data in the above embodiment Each step and function that the RLC entities of transmitting terminal are implemented, details are not described herein again.

The specific implementation mode of above-mentioned processor 1001, receiver 1003 and transmitter 1004 can accordingly refer to above-mentioned figure Illustrating in the receiving unit 101 in 30 embodiments, processing unit 102 and transmission unit 103, it is no longer superfluous here It states.

Based on design identical with above method embodiment, the embodiment of the present application also provides a kind of data receivers.

Using integrated unit, Figure 32 shows a kind of structure of possible data transmitting/receiving device 200 Schematic diagram.Data receiver 200 may include receiving unit 201 and processing unit 202. wherein, receiving unit 201, for connecing Receive the rlc protocol data cell PDU that the wireless spread-spectrum technology RLC entities of data transmitting equipment are sent.Processing unit 202, is used for Duplicate packages detection or data packet sequencing are carried out using the sequence number SN that the receiving unit 201 receives.

Wherein, the RLC PDU are the RLC entities of the data transmitting equipment according to the data transmitting equipment The PDCP PDU that Packet Data Convergence Protocol PDCP entities are sent correspond to generation, and the PDCP PDU include PDCP data PDU PDU is controlled with PDCP；The PDCP data PDU and PDCP controls PDU Whole RLC PDU, then the RLC entities of the data receiver using the PDCP data PDU and the PDCP control PDU in wrap The sequence number SN contained carries out duplicate packages detection or data packet sequencing, if the RLC PDU are segmentation RLC PDU, the data The RLC entities of receiving device carry out duplicate packages detection or data packet sequencing using the sequence number SN for including in the RLC PDU；Or Person, the PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include sequence number SN, if the RLC PDU couple The PDCP data PDU is answered, and the RLC PDU are complete RLC PDU, then the RLC entities of the data receiver use The sequence number SN for including in the PDCP data PDU carries out duplicate packages detection or data packet sequencing, if the RLC PDU correspond to institute PDCP data PDU are stated, and the RLC PDU are segmentation RLC PDU, then described in the RLC entity uses of the data receiver The sequence number SN for including in RLC PDU carries out duplicate packages detection or data packet sequencing；Alternatively, the PDCP data PDU and described PDCP controls PDU and does not include sequence number SN, if the RLC PDU correspond to the PDCP data PDU and include sequence number SN, The RLC entities of the data receiver carry out duplicate packages detection or data using the sequence number SN for including in the RLC PDU Packet sequencing.

In a kind of possible embodiment, the data receiver further includes transmission unit 203；The transmission unit After 203, the RLC PDU that the RLC entities for receiving data transmitting equipment in the receiving unit 201 are sent, if described PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include the sequence number SN or PDCP data PDU and institute It states PDCP controls PDU and does not include sequence number SN, then send the first instruction information to the PDCP entities of data receiver, it is described It is that PDCP controls PDU or PDCP data PDU that first instruction information, which is used to indicate the PDCP PDU,.

In a kind of possible embodiment, the data receiver further includes transmission unit 203；The transmission unit After 203, the RLC PDU that the RLC entities for receiving data transmitting equipment in the receiving unit 201 are sent, if described PDCP data PDU and PDCP controls PDU corresponds to the PDCP data PDU not comprising sequence number SN, the RLC PDU, Then the RLC entities of the data receiver send PDU pairs of the PDCP data to the PDCP entities of the data receiver The sequence number SN answered.

When being realized using example, in hardware, in the embodiment of the present invention, receiving unit 201 can be communication interface, receiver, Transmission circuit etc., processing unit 202 can be processor or controller.Transmission unit 203 can be communication interface, transmitter, Transmission circuit etc., wherein communication interface is to be referred to as, and may include one or more interfaces.

When the receiving unit 201 is receiver, processing unit 202 is processor, when transmission unit 203 is transmitter, Data receiver 200 involved by the embodiment of the present application can be data receiver shown in Figure 31.Wherein, described Figure 31 Shown in data receiver can be the network equipment.

Figure 33 show the schematic diagram of data receiver 2000 provided by the embodiments of the present application.The data receiver 2000 can be used for executing the execution method of the RLC entities of the data receiver involved in Fig. 3, Figure 17 or Figure 18.Such as Figure 31 institutes Show, the data receiver 2000 includes：Including processor 2001, memory 2002, receiver 2003 and transmitter 2004, Wherein, can be connected by bus system between processor 2001, memory 2002, receiver 2003 and transmitter 2004.Institute State memory 2002 for store include program, instruction or code.The processor 2001, for executing the memory 2002 In program, generate PDCP PDU and the RLC PDU with the data format involved in the above embodiment, and control and receive device 2003 and progress PDCP PDU and the RLC PDU's of transmitter 2004 sends and receivees, and implements data in the above embodiment Each step and function that the RLC entities of receiving terminal are implemented, details are not described herein again.

The specific implementation mode of above-mentioned processor 2001, receiver 2003 and transmitter 2004 can accordingly refer to above-mentioned figure Illustrating in the receiving unit 201 in 32 embodiments, processing unit 202 and transmission unit 203, it is no longer superfluous here It states.

It is understood that the embodiment of the present application illustrate only data transmitting equipment and the simplification of data receiver is set Meter.In practical applications, data transmitting equipment and data receiver are not limited to above structure, can divide in practical applications Not Bao Han any number of receiver, transmitter, processor and memory etc., and all ends that the embodiment of the present application may be implemented End is all within the protection domain of the embodiment of the present application.

It will be further understood that the present embodiments relate to data transmitting equipment and data receiver, can use In realizing the RLC entities of the RLC entities and data receiver of data sending terminal in above method embodiment of the embodiment of the present invention Corresponding function, thus it is not local in detail enough for description of the embodiment of the present invention, see the description of related method embodiment, this hair Details are not described herein for bright embodiment.

It will be further understood that the processor being related in the embodiment of the present application can be central processing unit (Central Processing Unit, referred to as " CPU "), can also be other general processors, digital signal processor (DSP), application-specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) or other programmable logic device, discrete gate Or transistor logic, discrete hardware components etc..General processor can be that microprocessor or the processor can also It is any conventional processor etc..

Memory may include read-only memory and random access memory, and provide instruction and data to processor.It deposits The a part of of reservoir can also include nonvolatile RAM.For example, memory can be with storage device type Information.

Bus system can also include power bus, controlling bus and status signal bus in addition in addition to including data/address bus Deng.But for the sake of clear explanation, various buses are all designated as bus system in figure.

During realization, each step involved in above method embodiment can pass through the integrated of the hardware in processor The instruction of logic circuit or software form is completed.The step of message processing method in conjunction with disclosed in the embodiment of the present application, can be with Be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software Module can be located at random access memory, flash memory, read-only memory, programmable read only memory or electrically erasable programmable storage In the storage medium of this fields such as device, register maturation.The storage medium is located in memory, and processor is read in memory Information completes the step of above method embodiment is related in conjunction with its hardware.To avoid repeating, it is not detailed herein.

The embodiment of the present application provides a kind of communication system, the communication system include the above-mentioned data transmitting equipment being related to and Data receiver.

The application puies forward embodiment and has supplied a kind of computer readable storage medium or computer program product, based on storing Calculation machine program, the computer program are used to execute the method in the arbitrarily possible design of first aspect and first aspect.

It should be understood by those skilled in the art that, the embodiment of the present application can be provided as method, system or computer program production Product.Therefore, in terms of the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and hardware Embodiment form.Moreover, it wherein includes computer available programs generation that the embodiment of the present application, which can be used in one or more, The meter implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code The form of calculation machine program product.

The embodiment of the present application is with reference to the method, equipment (system) and computer program product according to the embodiment of the present application Flowchart and/or the block diagram describe.It should be understood that can be realized by computer program instructions in flowchart and/or the block diagram The combination of flow and/or box in each flow and/or block and flowchart and/or the block diagram.These calculating can be provided Processing of the machine program instruction to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices Device is to generate a machine so that the instruction executed by computer or the processor of other programmable data processing devices generates For realizing the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes Device.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Obviously, those skilled in the art can carry out the embodiment of the present application various modification and variations without departing from this Shen Spirit and scope please.In this way, if these modifications and variations of the embodiment of the present application belong to the application claim and its wait Within the scope of technology, then the application is also intended to include these modifications and variations.

Claims

1. a kind of data transmission method, which is characterized in that including：

The wireless spread-spectrum technology RLC entities of data sending terminal receive the Packet Data Convergence Protocol PDCP entities hair of data sending terminal The PDCP protocol Data Unit PDU sent, and generate corresponding RLC PDU according to the PDCP PDU；

The RLC entities of data sending terminal send the RLC PDU to the RLC entities of data receiver；

Wherein, the PDCP PDU include PDCP data PDU and PDCP control PDU；

The PDCP data PDU and PDCP controls PDU includes sequence number SN, if the RLC PDU are complete RLC PDU does not include sequence number SN then in the RLC PDU, if the RLC PDU are in segmentation RLC PDU, the RLC PDU Including sequence number SN；

Alternatively,

The PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include sequence number SN, the PDCP data PDU The corresponding RLC PDU do not include sequence number SN if the RLC PDU are complete RLC PDU in the RLCPDU, if The RLC PDU are segmentation RLC PDU, then include sequence number SN in the RLC PDU；The PDCP controls the corresponding institutes of PDU It states RLC PDU and does not include sequence number SN；

Alternatively,

The PDCP data PDU and PDCP controls PDU does not include sequence number SN, the corresponding institute of the PDCP data PDU It includes sequence number SN to state RLC PDU；The PDCP controls the corresponding RLC PDU of PDU and does not include sequence number SN.

2. the method as described in claim 1, which is characterized in that if the PDCP data PDU includes sequence number SN, the PDCP It controls PDU and does not include the sequence number SN or PDCP data PDU and PDCP controls PDU not comprising sequence number SN, then

Include to be used to indicate the bit that the PDCP PDU are PDCP control PDU or PDCP data PDU in the RLC PDU.

3. method as claimed in claim 1 or 2, which is characterized in that the RLC entities include the first RLC entities and the 2nd RLC Entity, the first RLC entities and the 2nd RLC entities belong to identical or different data sending terminal；

If the PDCP entities of data sending terminal send PDCPPDU to the first RLC entities and the 2nd RLC entities, Then the RLC PDU also include instruction information, and the instruction information is the bit for being used to indicate whether to exist interval GAP；

Wherein, there are GAP, to characterize the PDCP PDU that the first RLC entities and the 2nd RLC entities receive be discontinuous , it characterizes the PDCP PDU that the first RLC entities and the 2nd RLC entities receive there is no GAP and is continuous；

If the instruction information instruction also includes GAP values there are GAP bits, the RLC PDU, the GAP values are for referring to Show the GAP numerical value between two that same RLC entities receive adjacent PDCP PDU.

4. method as claimed in claim 1 or 2, which is characterized in that the RLC PDU also include interval GAP values, the GAP Value is used to indicate the GAP numerical value between two that the RLC entities receive adjacent PDCP PDU.

5. such as Claims 1-4 any one of them method, which is characterized in that the RLC entities of the data sending terminal receive number After the PDCP PDU sent according to the PDCP entities of transmitting terminal, the method further includes：

The RLC entities of the data sending terminal receive the PDCP PDU associations that the PDCP entities of the data sending terminal are sent SN.

6. method as claimed in claim 2, which is characterized in that the RLC entities of the data sending terminal are according to the PDCPPDU Before data generate corresponding RLC PDU, the method further includes：

The RLC entities of the data sending terminal receive the first instruction information that the PDCP entities of the data sending terminal are sent, institute It is the instruction information that PDCP controls PDU or PDCP data PDU to state the first instruction information and be used to indicate the PDCP PDU.

7. a kind of data transmission method, which is characterized in that including：

The wireless spread-spectrum technology RLC entities of data receiver receive the rlc protocol data sheet that the RLC entities of data sending terminal are sent First PDU；

The RLC entities of the data receiver carry out duplicate packages detection or data packet sequencing using sequence number SN；

Wherein, the RLC PDU are grouped data of the RLC entities of the data sending terminal according to the data sending terminal The PDCP PDU that convergence protocol PDCP entities are sent correspond to generation, and the PDCP PDU include PDCP data PDU and PDCP control PDU processed；

The PDCP data PDU and PDCP controls PDU includes that sequence number SN, the RLC PDU are complete RLC PDU, Then the RLC entities of the data receiver use the sequence number SN for including in the PDCP data PDU and PDCP controls PDU Duplicate packages detection or data packet sequencing are carried out, if the RLC PDU are segmentation RLC PDU, the RLC of the data receiver is real Body carries out duplicate packages detection or data packet sequencing using the sequence number SN for including in the RLC PDU；

Alternatively,

The PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include sequence number SN, if the RLC PDU couple The PDCP data PDU is answered, and the RLC PDU are complete RLC PDU, then the RLC entities of the data receiver use institute It states the sequence number SN for including in PDCP data PDU and carries out duplicate packages detection or data packet sequencing, if described in RLC PDU correspondences PDCP data PDU, and the RLC PDU are segmentation RLC PDU, then the RLC entities of the data receiver use the RLC The sequence number SN for including in PDU carries out duplicate packages detection or data packet sequencing；

Alternatively,

The PDCP data PDU and PDCP controls PDU does not include sequence number SN, if described in RLC PDU correspondences PDCP data PDU and include sequence number SN, then the RLC entities of the data receiver use the sequence for including in the RLCPDU Number SN carries out duplicate packages detection or data packet sequencing.

8. the method for claim 7, which is characterized in that the RLC entities of the data receiver receive data sending terminal RLC entities send RLC PDU after, the method further includes：

If the PDCP data PDU includes sequence number SN, the PDCP control, PDU does not include the sequence number SN or PDCP Data PDU and PDCP controls PDU does not include sequence number SN, then the RLC entities of the data receiver are to data receiver The PDCP entities at end send the first instruction information, and the first instruction information is used to indicate the PDCP PDU and is controlled for PDCP PDU or PDCP data PDU.

9. method as claimed in claim 7 or 8, which is characterized in that the RLC entities of the data receiver receive data and send After the RLC PDU that the RLC entities at end are sent, the method further includes：

If the PDCP data PDU and PDCP controls PDU does not include sequence number SN, described in the RLC PDU are corresponded to PDCP data PDU, then the RLC entities of the data receiver send the PDCP numbers to the PDCP entities of the data receiver According to the corresponding sequence number SN of PDU.

10. a kind of data transmitting equipment, which is characterized in that including：

Receiving unit, the PDCP agreements that the Packet Data Convergence Protocol PDCP entities for receiving the data transmitting equipment are sent Data cell PDU；

Processing unit, the PDCP PDU for being received according to the receiving unit generate corresponding RLC PDU；

Transmission unit, for sending the RLC PDU that the processing unit generates to the RLC entities of data receiver；

Wherein, the PDCP PDU include PDCP data PDU and PDCP control PDU；

Alternatively,

11. data transmitting equipment as claimed in claim 10, which is characterized in that if the PDCP data PDU includes sequence number SN, the PDCP control PDU do not include the sequence number SN or PDCP data PDU and PDCP controls PDU and do not include Sequence number SN, then

12. the data transmitting equipment as described in claim 10 or 11, which is characterized in that the RLC entities include the first RLC real Body and the 2nd RLC entities, the first RLC entities and the 2nd RLC entities belong to identical or different data transmitting equipment；

If the PDCP entities of data transmitting equipment send PDCP to the first RLC entities and the 2nd RLC entities PDU, then the RLC PDU also include instruction information, and the instruction information is the bit for being used to indicate whether to exist interval GAP Position；

13. the data transmitting equipment as described in claim 10 or 11, which is characterized in that the RLC PDU also include interval GAP Value, the GAP values are used to indicate the GAP numerical value between two that the RLC entities receive adjacent PDCP PDU.

14. such as claim 10 to 13 any one of them data transmitting equipment, which is characterized in that the receiving unit is also used In：

After the PDCP PDU of PDCP entities transmission for receiving data sending terminal, the PDCP entities hair of the data sending terminal is received The associated SN of PDCP PDU sent.

15. data transmitting equipment as claimed in claim 11, which is characterized in that the receiving unit is additionally operable to：

Before the processing unit generates corresponding RLC PDU according to the PDCP PDU datas, receives the data and send The first instruction information that the PDCP entities at end are sent, the first instruction information are used to indicate the PDCP PDU and are controlled for PDCP The instruction information of PDU or PDCP data PDU.

16. a kind of data receiver, which is characterized in that including：

Receiving unit, the rlc protocol data cell that the wireless spread-spectrum technology RLC entities for receiving data transmitting equipment are sent PDU；

Processing unit, the sequence number SN for being received using the receiving unit carry out duplicate packages detection or data packet sequencing；

Wherein, the RLC PDU are grouping of the RLC entities of the data transmitting equipment according to the data transmitting equipment The PDCP PDU that data convergence protocol PDCP entities are sent, which are corresponded to, to be generated, the PDCP PDU include PDCP data PDU and PDCP controls PDU；

The PDCP data PDU and PDCP controls PDU includes that sequence number SN, the RLC PDU are complete RLC PDU, Then the RLC entities of the data receiver use the sequence number for including in the PDCP data PDU and PDCP controls PDU SN carries out duplicate packages detection or data packet sequencing, if the RLC PDU are segmentation RLCPDU, the data receiver RLC entities carry out duplicate packages detection or data packet sequencing using the sequence number SN for including in the RLC PDU；

Alternatively,

The PDCP data PDU includes that sequence number SN, the PDCP control PDU do not include sequence number SN, if the RLC PDU couple The PDCP data PDU is answered, and the RLC PDU are complete RLC PDU, then the RLC entities of the data receiver use The sequence number SN for including in the PDCP data PDU carries out duplicate packages detection or data packet sequencing, if the RLC PDU correspond to institute PDCP data PDU are stated, and the RLC PDU are segmentation RLC PDU, then described in the RLC entity uses of the data receiver The sequence number SN for including in RLC PDU carries out duplicate packages detection or data packet sequencing；

Alternatively,

The PDCP data PDU and PDCP controls PDU does not include sequence number SN, if described in RLC PDU correspondences PDCP data PDU and include sequence number SN, then the RLC entities of the data receiver use the sequence for including in the RLCPDU Row number SN carries out duplicate packages detection or data packet sequencing.

17. data receiver as claimed in claim 16, which is characterized in that the data receiver further includes sending list Member；

The transmission unit, for the receiving unit receive data transmitting equipment RLC entities send RLC PDU it Afterwards, if the PDCP data PDU includes sequence number SN, the PDCP control, PDU does not include sequence number SN or the PDCP numbers Do not include sequence number SN according to PDU and PDCP controls PDU, then sends the first instruction to the PDCP entities of data receiver Information, it is that PDCP controls PDU or PDCP data PDU that the first instruction information, which is used to indicate the PDCP PDU,.

18. the data receiver as described in claim 16 or 17, which is characterized in that the data receiver further includes hair Send unit；

The transmission unit, for the receiving unit receive data transmitting equipment RLC entities send RLC PDU it Afterwards, if the PDCP data PDU and PDCP controls PDU corresponds to the PDCP not comprising sequence number SN, the RLC PDU Data PDU, then the RLC entities of the data receiver send the PDCP numbers to the PDCP entities of the data receiver According to the corresponding sequence number SN of PDU.