CN107113595A - A kind of data transmission method, radio reception device and communication system - Google Patents

Abstract

The embodiment of the present invention provides a kind of data transmission method, radio reception device and communication system, wherein, the radio reception device is used to user equipment wirelessly is accessed into cable network, the radio reception device includes Transmit-Receive Unit and processing unit, the processing unit is used to encapsulate a first interface packet, the net load of the first interface packet includes N number of first payload data bag, N is the integer more than or equal to one, and the head of the first interface packet at least includes being used to indicate the information of the quantity of the first payload data bag；The Transmit-Receive Unit is used to send the first interface packet to another radio reception device by the interface between another radio reception device.Utilize the data transmission method, radio reception device and communication system of offer, it is possible to achieve multiple payload data bags are transmitted in an interface data bag, so as to improve efficiency of transmission.

Description

A kind of data transmission method, radio reception device and communication system Technical field

The present invention relates to fields of communication technology, more particularly to a kind of data transmission method, radio reception device and communication system.

Background technique

Doubly-linked connection technology is to be currently discussed a kind of more technology, which may be implemented the separation of user face and control plane in architecture design, can promote user's throughput performance by polymerizeing the radio resource of different base station in user face.

In doubly-linked connection technology, the efficiency of transmission between current different base station is lower, and how to improve the efficiency of transmission between different base station is current urgent problem to be solved.

Summary of the invention

The embodiment of the present invention provides a kind of data transmission method, radio reception device and system, to improve the efficiency of transmission between different radio access device.

First aspect, the embodiment of the present invention provides a kind of radio reception device, radio reception device is for wirelessly accessing cable network for user equipment, the radio reception device includes Transmit-Receive Unit and processing unit, the processing unit is for encapsulating a first interface data packet, the net load of the first interface data packet includes N number of first payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information for being used to indicate the quantity of the first payload data packet；The Transmit-Receive Unit is used to send the first interface data packet to another radio reception device by the interface between another radio reception device.

Pass through the information of the quantity in interface data packet including payload data packet, in the situation consistent in length for the payload data packet that can be carried in interface data packet, more than one payload data packet is transmitted between another radio reception device, to improve efficiency of transmission.

With reference to first aspect, in the first possible implementation of the first aspect, the head of the first interface data packet can also include each at least N-1 the first payload data packets being used to indicate in N number of The information of length.

By further comprise in interface data packet at least N-1 that is used to indicate in N number of the first payload data packets the length of each information, it can not consider each payload data packet length whether under unanimous circumstances, it realizes and transmits more than one payload data packet between another radio reception device, to improve efficiency of transmission.

With reference to first aspect or the first possible implementation of first aspect, in the second possible implementation of the first aspect, the information for being used to indicate the quantity of the first payload data packet is a domain, is filled with the total quantity N of the first payload data packet；Alternatively,

The information for being used to indicate the quantity of the first payload data packet is N number of domain, and for each domain representation there are a corresponding first payload data packet, different domains corresponds to the first different payload data packets.

With reference to first aspect or the first or second of possible implementation of first aspect, in a third possible implementation of the first aspect, the information for being used to indicate the length of each of at least N-1 in N number of the first payload data packets is N-1 domain, the length of the corresponding first payload data packet of each domain representation one, different domains corresponds to the first different payload data packets, or

The information for being used to indicate the length of each of at least N-1 in N number of the first payload data packets is N number of domain, and the length of the corresponding first payload data packet of each domain representation one, different domains corresponds to the first different payload data packets.

With reference to first aspect or first aspect the first, second or the third possible implementation, in a fourth possible implementation of the first aspect, the first payload data packet includes the information for being sent to user equipment, alternatively, including from the received information of user equipment.

With reference to first aspect or the possible implementation of any one in first to fourth kind of first aspect, in the fifth possible implementation of the first aspect, the Transmit-Receive Unit is also used to a second interface data packet by the interface between another radio reception device from another radio reception device, the net load of the second interface data packet includes S the second payload data packets, S is the integer more than or equal to one, and the head of the second interface data packet includes at least the information for being used to indicate the quantity of the second payload data packet；

The information that processing unit is also used to be used to indicate the quantity of the second payload data packet entrained by the second interface data packet header parses the second interface data packet, obtains S the second payload datas Packet.

The 5th kind of possible implementation with reference to first aspect, in the sixth possible implementation of the first aspect, the head of the second interface data packet further includes the information of the length of each of at least S-1 the second payload data packets being used to indicate in S, the information that the processing unit is also used to be used to indicate the information and the length of each of at least S-1 the second payload data packets being used to indicate in S of the quantity of the second payload data packet entrained by the second interface data packet header parses the second interface data packet, obtain S the second payload data packets.

With reference to first aspect or the possible implementation of any one in the first to six kind of first aspect, in a seventh possible implementation of the first aspect, the base station is the base station in cellular communications networks, alternatively, the access point in Wireless LAN (WLAN).

Second aspect, the embodiment of the present invention provides a kind of communication system, and including the first radio reception device and the second radio reception device being connected by interface, first radio reception device and the second radio reception device are all used to that user equipment wirelessly to be accessed cable network, wherein

First radio reception device, for sending an interface data packet to the second radio reception device by the interface, the net load of the interface data packet includes N number of payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information for being used to indicate the quantity of the payload data packet；With

Second radio reception device, for being parsed according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header to the interface data packet, obtaining N number of payload data packet by the interface interface data packet.

In conjunction with second aspect, in the first possible implementation of the second aspect, the head of the interface data packet further includes the information of the length of each of at least N-1 payload data packet being used to indicate in N number of, and the information that the second radio reception device can be also used for the length of each of the information according to the quantity for being used to indicate the payload data packet and at least N-1 payload data packet being used to indicate in N number of parses the interface data packet.

In conjunction with the possible implementation of the first of second aspect or second aspect, in a second possible implementation of the second aspect, which is a domain, is filled with the total quantity N of the payload data packet；Alternatively,

The information for being used to indicate the quantity of the payload data packet is N number of domain, and there are a corresponding payload data packet, different domains to correspond to different payload data packets for each domain representation.

In conjunction with the first or second of possible implementation of second aspect or second aspect, in the third possible implementation of the second aspect, the information for being used to indicate the length of each of at least N-1 payload data packet in N number of is N-1 domain, the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets, or

The information for being used to indicate the length of each of at least N-1 payload data packet in N number of is N number of domain, and the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets.

In conjunction with any one possible implementation in the first to three kind of second aspect or second aspect, in the fourth possible implementation of the second aspect, first radio reception device is the source base station in handoff scenario, which is the target BS in handoff scenario；Alternatively,

First radio reception device and the second radio reception device are the radio reception device in dual link scene.

In conjunction with any one possible implementation in first to fourth of second aspect or second aspect kind, in a fifth possible implementation of the second aspect, first radio reception device and the second radio reception device are the base station in cellular communications networks, or, first radio reception device is the base station in cellular communications networks, second radio reception device is the access point in WLAN, or, first radio reception device is the access point in WLAN, which is the base station in cellular communications networks.

The third aspect, the embodiment of the present invention provide a kind of method of data transmission, comprising:

An interface data packet of second radio reception device by the interface between the second radio reception device from first radio reception device, the net load of the interface data packet includes N number of payload data packet, N is the integer more than or equal to one, and the head of the interface data packet includes at least the information for being used to indicate the quantity of the payload data packet；

Second radio reception device parses the interface data packet according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header, obtains N number of payload data packet.

In conjunction with the third aspect, in the first possible implementation of the third aspect, the interface data packet Head further includes the information of the length of each of at least N-1 payload data packet being used to indicate in N number of, and the information that the second radio reception device can be also used for the length of each of the information according to the quantity for being used to indicate the payload data packet and at least N-1 payload data packet being used to indicate in N number of parses the interface data packet.

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the second possible implementation of the third aspect, which is a domain, is filled with the total quantity N of the payload data packet；Alternatively,

The information for being used to indicate the quantity of the payload data packet is N number of domain, and there are a corresponding payload data packet, different domains to correspond to different payload data packets for each domain representation.

In conjunction with the first or second of possible implementation of the third aspect or the third aspect, in the third possible implementation of the third aspect, the information for being used to indicate the length of each of at least N-1 payload data packet in N number of is N-1 domain, the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets, or

The information for being used to indicate the length of each of at least N-1 payload data packet in N number of is N number of domain, and the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets.

In conjunction with the third aspect or the third aspect first into the third any one possible implementation, in the fourth possible implementation of the third aspect, first radio reception device is the source base station in handoff scenario, which is the target BS in handoff scenario；Alternatively,

First radio reception device and the second radio reception device are the radio reception device in dual link scene.

In conjunction with any one possible implementation in first to fourth kind of the third aspect or the third aspect, in the 5th kind of possible implementation of the third aspect, first radio reception device and the second radio reception device are the base station in cellular communications networks, or, first radio reception device is the base station in cellular communications networks, second radio reception device is the access point in WLAN, or, first radio reception device is the access point in WLAN, which is the base station in cellular communications networks.

Fourth aspect, the embodiment of the present invention also provide a kind of X2 interface user plane protocol frame format, including PDU Type and X2-U sequence number further include the information for being used to indicate the quantity of data packet included by net load, wherein the quantity of data packet included by the net load is N.Data packet included by net load can be PDU, or SDU

Wherein, X2 interface is the interface in cellular communications networks between two base stations.It is logic interfacing, can be wireline interface, or wireless interface.

The X2 interface user plane protocol frame format both can be used for the transmission of downlink data, can be used for the transmission of upstream data.When including PDU in the frame format, it is applied to dual link scene, including when SDU, is applied to handoff scenario.

It further include the information of the length of each of at least N-1 data packet being used to indicate in N number of in the first possible implementation of the fourth aspect in conjunction with fourth aspect.

In conjunction with the possible implementation of the first of fourth aspect or fourth aspect, in the second possible implementation of the fourth aspect, the information for being used to indicate the quantity of data packet included by net load is a domain, is filled with the total quantity N of the data packet；Alternatively,

The information for being used to indicate the quantity of data packet included by net load is N number of domain, and there are a corresponding data packet, different domains to correspond to different data packets for each domain representation.

In conjunction with the first or second of possible implementation of fourth aspect or fourth aspect, in the third possible implementation of the fourth aspect, the information of the length of each of at least N-1 data packet being used to indicate in N number of is N-1 domain, the length of each one corresponding data packet of domain representation, different domains corresponds to different data packets, or

The information of the length of each of at least N-1 data packet being used to indicate in N number of is N number of domain, and the length of each one corresponding data packet of domain representation, different domains corresponds to different data packets.

5th aspect, the embodiment of the present invention also provide a kind of Xw interface user plane protocol frame format, the information of the quantity including being used to indicate data packet included by net load, wherein the quantity of data packet included by the net load is N, can be PDU.Wherein, Xw interface is the logic interfacing between the access point in the base station and wlan network in cellular communications networks, can be wireline interface, or wireless interface.

It further include the information of the length of each of at least N-1 data packet being used to indicate in N number of in the first possible implementation of the 5th aspect in conjunction with the 5th aspect.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in second of possible implementation of the 5th aspect, the information for being used to indicate the quantity of data packet included by net load is a domain, is filled with the total quantity N of the data packet；Alternatively,

The information for being used to indicate the quantity of data packet included by net load is N number of domain, and there are a corresponding data packet, different domains to correspond to different data packets for each domain representation.

In conjunction with the first or second of possible implementation of the 5th aspect or the 5th aspect, in the third possible implementation of the 5th aspect, the information of the length of each of at least N-1 data packet being used to indicate in N number of is N-1 domain, the length of each one corresponding data packet of domain representation, different domains corresponds to different data packets, or

The information of the length of each of at least N-1 data packet being used to indicate in N number of is N number of domain, and the length of each one corresponding data packet of domain representation, different domains corresponds to different data packets.

Data transmission method, radio reception device and communication system provided in an embodiment of the present invention, and frame format, by carrying information relevant with payload data packet entrained in interface data packet in interface data packet, so that by the way that more than one payload data packet can be transmitted in an interface data packet, to improve efficiency of transmission.

In order to make it easy to understand, illustratively giving for reference with the explanation of part concept related to the present invention.It is as follows:

Third generation partner program (English: 3^rdGeneration partnership project, abbreviation 3GPP) it is the project for being dedicated to developing cordless communication network.In general, the relevant mechanism of 3GPP is known as 3GPP mechanism.

Cordless communication network is a kind of network of offer wireless communication function.Cordless communication network can use the different communication technologys, such as CDMA (English: code division multiple access, abbreviation CDMA), wideband code division multiple access (wideband code division multiple access, abbreviation WCDMA), time division multiple acess (English: time division multiple access, referred to as: TDMA), frequency division multiple access (English: frequency division multiple access, abbreviation FDMA), orthogonal frequency division multiple access (English: orthogonal frequency-divisi On multiple access, referred to as: OFDMA), single-carrier frequency division multiple access (English: single Carrier FDMA, referred to as: SC-FDMA), Carrier Sense Multiple Access/conflict keeps away Exempt from (English: Carrier Sense Multiple Access with Collision Avoidance).Network can be divided into 2G (English: generation) network, 3G network or 4G network according to factors such as the capacity of heterogeneous networks, rate, time delays.Typical 2G network includes global system for mobile communications (English: global system for mobile communications/general packet radio service, referred to as: GSM) network or General Packet Radio Service (English: general packet radio service, referred to as: GPRS) network, typical 3G network includes Universal Mobile Communication System (English: universal mobile telecommunications system, referred to as: UMTS) network, typical 4G network includes long term evolution (English: long term e Volution, referred to as: LTE) network.Wherein, UMTS network is referred to as universal land radio access web (English: universal terrestrial radio access network sometimes, referred to as: UTRAN), LTE network is referred to as Evolved UTRAN (English: evolved universal terrestrial radio access network, abbreviation: E-UTRAN) sometimes.According to the difference of resource distribution mode, cellular communications networks and Wireless LAN (English: wireless local area networks, abbreviation: WLAN) can be divided into, wherein cellular communications networks are leading for scheduling, and WLAN is to compete to dominate.2G, 3G and 4G network above-mentioned, is cellular communications networks.Those skilled in the art are, it should be understood that technical solution provided in an embodiment of the present invention can be applied equally to other cordless communication networks, such as 4.5G 5G network or other non-cellular communication networks with the development of technology.For sake of simplicity, cordless communication network is referred to as network sometimes by the embodiment of the present invention.

Cellular communications networks are one kind of cordless communication network, use cellular radio networking mode, are connected between terminal device and the network equipment by radio channel, and then realize that user can aprowl be in communication with each other.Its mobility for being mainly characterized by terminal, and have the function of handover and across local network automatic roaming.

User equipment (English: user equipment, referred to as: UE) and it is a kind of terminal device, it can be mobile terminal equipment, be also possible to immovable terminal device.The equipment is mainly used for receiving or sending business datum.User equipment can be distributed in network, and user equipment has different titles in different networks, such as: terminal, mobile station, subscriber unit, platform, cellular phone, personal digital assistant, radio modem, wireless telecom equipment, handheld device, laptop computer, wireless phone, wireless local loop platform etc..The user equipment can be communicated through wireless access network (radio access network, referred to as: RAN) (the access part of cordless communication network) with one or more core nets, such as be handed over wireless access network Change voice and/or data.

Base station (English: base station, referred to as: BS) equipment, alternatively referred to as base station, it is a kind of wireless access network that is deployed in provide the device of wireless communication function.Such as the equipment that base station functions are provided in 2G network includes base radio transceiver station (English: base transceiver station, referred to as: BTS) and base station controller is (English: base station controller, referred to as: BSC), the equipment that base station functions are provided in 3G network includes node B (English abbreviation: NodeB) and radio network controller (English: radio network controller, referred to as: RNC), the equipment that base station functions are provided in 4G network includes the node B (English: evolved NodeB of evolution, referred to as: eNB), in a wlan, the equipment for providing base station functions is access point (English: Acc Ess Point, referred to as: AP).

Dual link (English: dual connectivity, referred to as: DC), refer to a RRC (English: radio resource control, Chinese: wireless heterogeneous networks) UE of connected state obtains the operation of radio resource from least two different network nodes, and there are non-ideal time delays for the connection between the two network nodes.

Master base station (English: master BS, referred to as: MBS), refer under dual link scene, be connected with mobile management net element, is responsible for the base station of the mobile management of UE.It is deployed in master base station under dual link scene with the control plane of UE communication, the shunting and convergence of the business datum in user face are also realized in master base station.In the lte networks, master base station is main eNB (English: master eNB, abbreviation MeNB).

From base station (English: secondary BS, abbreviation: SBS), refers under dual link scene, in addition to MBS, the BS of additional radio resource is provided for UE.In the lte networks, it is from eNB (English: secondary eNB, abbreviation SeNB) from base station, is AP from base station in a wlan.

Mobile management net element (English: mobile management network element, referred to as: MMNE) it is a kind of device for being deployed in core net and being used to carry out UE mobile management.Such as in 2G or 3G network, mobile management net element includes Serving GPRS Support Node (English: serving GPRS support node, referred to as: SGSN), in 4G network, mobile management net element includes mobile management entity (English: mobility management entity, abbreviation: MME).

X2 interface, is the interface between two base stations in cellular communications networks defined in current 3GPP agreement, and transport protocol defers to GPRS Tunnel Protocol user plane protocol.

GPRS Tunnel Protocol user face (English: GPRS tunneling protocol-user plane, referred to as: It GTP-U), is a comparatively fairly simple IP-based tunnel protocol, it allows to pass through multiple tunnel communications between receiving-transmitting sides.

X2 interface user face (English: X2-User plane, referred to as: X2-U), user plane information between base station is used for transmission in X2 interface, and the agreement mainly used is GTP-U agreement.

X2 interface application protocol (English: X2 Application protocol, referred to as: X2-AP), it is the agreement used when the transmission of X2 interface control plane message.

Network protocol (English: Internet Protocol, referred to as: IP), it is to be connected with each other the agreement for being communicated and being designed for computer network.In the internet, it is to make to connect all computer networks on the net to realize the set of rule being in communication with each other, it is specified that it is the rule that should be abided by that computer carries out communication on the internet.

Packet Data Convergence Protocol (English: packet data convergence protocol, referred to as: PDCP) layer, belong to the second layer of Radio interface protocols stack, wireless resource management (RRC) message in processing control plane and Internet Protocol (IP) packet on user face.On user face, after the PDCP layers of IP data packet received from upper layer, head compression and encryption is carried out to IP data packet, are then submitted to rlc layer；PDCP layers also provide the function of sequentially submitting and repeat monitoring to upper layer.In control plane, PDCP layers provide Signaling Transport service for upper layer RRC, and realize encryption and the consistency protection of RRC signaling, and in the reversed upper decryption and consistency check for realizing RRC signaling.

Wireless spread-spectrum technology (English: radio link control, referred to as: RLC) layer, it is located at PDCP layers between MAC layer, provides segmentation and retransmission service for user face and control face data.

Service data unit (English: service data unit, abbreviation: SDU), also known as Service Data Unit, are that the information unit come from upper-layer protocol is transmitted to lower layer protocol.This layer of service data unit SDU and upper one layer of protocol Data Unit (English: protocol data unit, abbreviation: PDU) are one-to-one.The data not processed into each layer are known as service data unit (SDU), and the data that specific format is formed after this layer processing are referred to as protocol Data Unit (PDU).Meanwhile the PDU of this layer of formation is next layer of SDU.

Wireless LAN (English: Wireless Local Area Networks, referred to as: WLAN), refer to that the local area network using radio wave as data transport media, transmitting range generally only have tens meters.

Access point (English: Access Point, referred to as: AP), connect wireless network, the equipment that cable network can also be connected.It can be as intermediate point, so that wired equipment with wireless networking interconnects, transmission data.

Evolved packet system (English: Evolved Packet System, referred to as: EPS) carry, one data flow of unique identification, this data flow is in UE and PDN Gateway (English: Public-Data-Network GateWay, service quality (English: Quality of Service, abbreviation: QoS) having the same between referred to as: P-GW).

Gateway (English: Serving Gateway, referred to as: S-GW), it is the important gateway in EPS core net, it is responsible for the routing and forwarding of user data package, while is also responsible for exchanging for user face data of UE when moving between the network node such as eNodeB of 3GPP technology or between LTE network and the network of other 3GPP technologies.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the description of the embodiments or prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without any creative labor, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of 4G LTE network framework schematic diagram provided in an embodiment of the present invention；

Fig. 2 is a kind of schematic diagram of X2 interface user face protocol stack provided in an embodiment of the present invention；

Fig. 3 is the schematic diagram of dual link scene provided in an embodiment of the present invention；

Fig. 4 is the scheme schematic diagram provided in an embodiment of the present invention that shunting is realized at PDCP layers；

Fig. 5 is the operation chart that MeNB provided in an embodiment of the present invention forwards PDCP PDU to SeNB；

Fig. 6 is the schematic diagram of the X2 interface user plane protocol frame format of down user data provided in an embodiment of the present invention；

Fig. 7 is the schematic diagram of PDCP layers of dual link uplink scene provided in an embodiment of the present invention convergence；

Fig. 8 is the schematic diagram shunted in cellular communications networks provided in an embodiment of the present invention and WLAN DC scene at PDCP layers；

Fig. 9 is the block diagram of data transmission method provided in an embodiment of the present invention；

Figure 10 is the block diagram of radio reception device provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained under that premise of not paying creative labor, shall fall within the protection scope of the present invention.

The network architecture and business scenario of description of the embodiment of the present invention are the technical solutions in order to more clearly illustrate the embodiment of the present invention, the restriction for technical solution provided in an embodiment of the present invention is not constituted, known to those of ordinary skill in the art, with the differentiation of the network architecture and the appearance of new business scene, technical solution provided in an embodiment of the present invention is equally applicable for similar technical problem.

It is illustrated by taking the scene of 4G network in cordless communication network as an example below.

Fig. 1 show a kind of 4G LTE network framework, from the figure, it can be seen that there are X2 interface between eNB.X2 interface is supported to carry out Signalling exchange between two eNB, while supporting to send PDU to corresponding tunnel end node.X2 interface agreement framework is formed by two layers: wireless network layer and transport network layer.Wireless network layer and transport network layer separate, and wireless network layer defines the related regulation to interoperate between eNB, is made of wireless network layer control plane and user face.Transport network layer then provides transmission service for the data of the signaling of control plane and user face.X2 interface agreement includes two parts: wireless signaling protocol (X2-AP agreement) and user plane protocol (GTP-U agreement).X2 interface user face protocol stack is as shown in Figure 2, including GTP-U, UDP (Chinese: User Datagram Protocol, English: User Datagram Protocol), IPv6and/or IPv4 (sixth version Internet Protocol and/or fourth edition Internet Protocol), data link layer (date link layer) and physical layer (physical layer).Transport network layer is based on GTP-U agreement by X2 interface and carries out IP-based data stream transmitting.

Doubly-linked connection technology allows a UE to obtain radio resource from least two network nodes simultaneously, wherein radio resource is used for transmission services data between UE and network node.By taking LTE network as an example, as shown in figure 3, being connected by X2 interface therebetween, UE can there are master base station MeNB and from base station SeNB in network To obtain radio resource from MeNB and SeNB simultaneously, radio resource only can also be obtained from MeNB.In UE while under the scene that MeNB and SeNB obtain radio resource, EPS carries 2 from upper layer network element in figure, such as S-GW, it is dealt into after MeNB, MeNB is shunted, data some or all of in EPS carrying 2 are forwarded a packet into SeNB, UE are forwarded by SeNB, the remaining data packet of EPS carrying 2 is still sent to UE by MeNB；UE receives the partial data packet of the partial data packet of the EPS carrying 2 of MeNB transmission and the EPS carrying 2 of SeNB forwarding simultaneously.EPS carrying 1 is sent to UE by MeNB then without shunting.

The application of doubly-linked connection technology can effectively improve the handling capacity of UE and the capacity of system.

In the embodiment of the present invention one, by taking the downlink transfer in doubly-linked connection technology as an example.In specific implementation, scheme as shown in Figure 4, PDCP layer of the program by triage operator in MeNB are realized: user data reaches the PDCP layer of MeNB from upper layer network element, and the PDCP layer of MeNB is packaged data, forms PDCP PDU；MeNB is distributed PDCP PDU according at least one of conditions such as network load, the link circuit condition of MeNB and SeNB, is sent to the corresponding rlc layer of MeNB itself PDCP and SeNB respectively.If scheme shown in Fig. 4 is based on LTE network, Xn interface is X2 interface, i.e. at least one PDCP PDU is sent to SeNB by X2 interface by MeNB simultaneously.In all embodiments of the invention, the data packet transmitted on X2 interface is known as X2-U packet, and since its transport protocol defers to GTP-U agreement, alternatively referred to as GTP-U packet.GTP-U packet may include GTP-U Header (head), GTP-U Extension Header (extended head) and net load (payload).GTP-U Header format be it is fixed, the type of GTP-U Extension Header and GTP-U Extension Header is usually indicated whether in its last byte.X2-U packet may include head and net load.

A kind of operation of MeNB to SeNB forwarding PDCP PDU is defined in 3GPP TS 36.425.As shown in figure 5, MeNB single sends at least one PDCP PDU to SeNB, and at least one described PDCP PDU is packaged into X2-U packet using GTP-U agreement, while an X2-U sequence number is distributed for the X2-U packet and is identified.DL USER DATA (down user data) is the X2-U packet in Fig. 5, is a kind of X2 interface user plane protocol frame format defined for MeNB in dual link to SeNB converting downlink PDCP PDU.Fig. 6 is to transmit the frame format particular content that downlink PDCP PDU is defined in X2 interface, it is known as DL USER DATA (PDU Type 0) Format (down user data (PDU type 0) format) in a standard, is referred to as the X2 interface user plane protocol frame of down user data in all embodiments of the invention Format.The frame format includes PDU Type (type), spare (reserved bit) and X2-U Sequence Number (sequence number).Wherein, when PDU Type (=0) (type) indicates that PDU Type value is 0000, the X2-U Packet type is down user data (DL USER DATA), X2-U sequence number is the number of the correspondence X2-U packet of MeNB distribution, spare is reserved bit, 0 can be all written as by transmitting terminal, receiving end can not parse.Spare extension in Fig. 6 is extension reserved bit, is the last 0-4 byte on head, for meeting the restriction in 36.425 agreement of TS to the length of X2-U packet header, i.e., the length of X2-U packet header for 4 bytes integral multiple.

After the head that MeNB determines X2-U packet, at least one the PDCP PDU forwarded will be needed to be encapsulated in X2-U packet as the net load of X2-U packet.After SeNB receives the down user data (i.e. the X2-U packet), PDCP PDU can be parsed according to PDU the type field, and be transmitted to UE.The case where existing frame format design can only support MeNB to transmit only one PDCP PDU to SeNB by an X2-U packet, even if carrying more than one PDCP PDU in an X2-U packet, recipient SeNB also can not correctly parse it, lower so as to cause efficiency of transmission between MeNB and SeNB.The embodiment of the invention provides a kind of methods, being modified in the method by the X2 interface user plane protocol frame format to down user data makes it include field (also referred to as domain) relevant with one or more than one PDCP PDU is transmitted, make not only carry more than one PDCP PDU between MeNB and SeNB in an X2-U packet, recipient can also be made to carry out the parsing of X2-U packet according to this definition, to correctly parse the more than one PDCP PDU carried in X2-U packet.

Optionally, the mode modified to the X2 interface user plane protocol frame format of down user data can be any one in following three kinds:

The first of the mode of modification:

All PDCP PDU sizes (also referred to as length) that setting MeNB is forwarded to SeNB are all identical, it then can be only on the head of X2-U packet, newly-increased domain come indicate the PDCP PDU in net load number, specifically, it can use spare, also can use part undefined in current frame format.It is exemplary, modification to be carried out to down user data X2 interface user plane protocol frame format defined in 36.425 agreement of TS as shown in table 1, include: to increase a PDCP PDU quantity instructions field Number of PDCP PDU in X2-U packet header, how many PDCP PDU in net load be used to refer to.In this example, quantity instructions field For X2-U Sequence Number followed by a byte, it is to be understood that be not limited to this.

The modified down user data X2 interface user plane protocol frame format of table 1

For example, if MeNB has the PDCP PDU of 3 1000 bytes to need to be transmitted to SeNB, MeNB group wrap when, forwarding PDCP PDU number 3 is written in PDCP PDU quantity instructions field, such as by 3 in the form of a binary number 00000011 write-in PDCP PDU quantity instructions field, the net load size of composed X2-U packet is 3000 bytes.

It is 3 that SeNB, which is received and parsed PDCP PDU number from the head of X2-U packet after X2-U packet, then reads the net load of X2-U packet, splits to it, parses 3 sizes as the PDCP PDU of 1000 bytes.

It is to be understood that

1) PDCP PDU quantity instructions field can be in head any position.

2) PDCP PDU quantity instructions field is not limited to indicate in the form of binary number in above example, it can also indicate in other ways, a byte being also not necessarily limited in above example, it can be other modes, such as 2 bytes (Byte), or 10 bits (Bit), meet head in a manner of zero padding with byte-aligned.For example, can also be indicated with position, for example, if there is a PDCP PDU, then when quantity instructions field value is 10000000,2 PDCP PDU, when 11000000,10 PDCP PDU of value, value is 11,111,111 11000000.

Which increases PDCP PDU quantity instructions field Number of PDCP PDU on the basis of the frame format of 36.425 protocol definition of TS.The number of PDCP PDU in the net load of X2-U packet can be effectively identified by this way, to indicate that SeNB effectively parses X2-U packet and obtains the PDCP PDU of the sizes such as each.

Second of the mode of modification:

Which is the improvement in above-mentioned first way, whether the PDCP PDU size that can not consider that MeNB is forwarded to SeNB using which is consistent, can both apply and forward in MeNB to SeNB PDCP PDU scene of the same size, the scene that the PDCP PDU forwarded to SeNB in MeNB can also be applied not of uniform size.

Specifically, increasing a PDCP PDU quantity instructions field Number of PDCP PDU on the head of X2-U packet, how many PDCP PDU in the net load of the packet be used to refer to.Further, increase PDCP PDU Length Indication domain LI (English: length indicator) on the head of X2-U packet, it is used to indicate the length of PDCP PDU, the number of PDCP PDU Length Indication domain LI is variable, PDCP PDU number can be equal to, it can also be one fewer than PDCP PDU number.From saving for expense angle, the latter is more preferable.In the present embodiment, selection does not indicate the length of the last one PDCP PDU to be specifically described, and PDCP PDU Length Indication domain LI is expansion at this time, i.e., as only one PDCP PDU of net load, LI is not present.Exemplary, as shown in table 2 below, Number of PDCP PDU is PDCP PDU quantity instructions field, accounts for 1 byte, and in this example, the quantity of PDCP PDU is K+1, LI₁The length for indicating first PDCP PDU accounts for 2 bytes, LI₂The length for indicating second PDCP PDU accounts for 2 bytes, and so on, LI_kThe length for indicating k-th PDCP PDU, accounts for 2 bytes.Since under this mode, PDCP PDU quantity instructions field is certainly existed, hereon referred to as fixed part.PDCP PDU Length Indication domain is that there may be may be not present, hereon referred to as expansion.

2 down user data X2 interface user plane protocol frame format of table

By taking MeNB forwards a PDCP PDU to SeNB by X2 interface as an example, the down user data X2 interface user plane protocol frame format is as shown in table 3 below, Number of PDCP PDU value is 00000001, and expansion is not present at this time, and the net load of X2-U packet is a PDCP PDU.

Frame format when 3 net load of table is a PDCP PDU

Again by taking MeNB forwards two PDCP PDU to SeNB by X2 interface as an example, the down user data X2 interface user plane protocol frame format is as shown in table 4 below.Number of PDCP PDU value is 00000010, indicates that the net load of X2-U packet is two PDCP PDU, there is expansion, the LI of expansion at this time₁Indicate the length of first PDCP PDU in net load.SeNB can be according to LI after receiving the X2-U packet₁First PDCP PDU is parsed, remaining net load is then second PDCP PDU.

Frame format when 4 net load of table is two PDCP PDU

It is to be understood that

1) LI length is not restricted to 16 in this example, and length shared by PDCP PDU quantity instructions field is also not limited to 8 in this example.Guarantee that header byte is aligned in a manner of zero padding.

2) PDCP PDU quantity instructions field can be in head any position.

3) PDCP PDU quantity instructions field is not limited to indicate in the form of binary number in this example, or other modes.For example, can also be indicated with position, for example, then quantity instructions field value is 10000000 if there is a PDCP PDU, when two PDCP PDU, value 11000000, when ten PDCP PDU, value is 11,111,111 11000000.

Which increases fixed PDCP PDU quantity instructions field Number of PDCP PDU on the basis of the format that TS 36.425 is defined, and dynamic increases Length Indication domain LI.The composition of PDCP PDU in the net load of X2-U packet can be effectively indicated by this way, to indicate that SeNB effectively parses X2-U packet and obtains each PDCP PDU.

The mode of modification the third:

Increase by a Bits Expanding position E on the head of X2-U packet, for indicating whether the quantity of PDCP PDU is one, if one, then the head of the packet does not include for indicate how transmitting the expansion of more than one PDCP PDU.Since extension bits E is certainly existed in the modification mode, hereon referred to as fixed part.Specifically, as an example, as shown in table 5 below, the value of E is 0, indicate that expansion is not present, i.e. net load is a PDCP PDU；The value of E is 1, indicates that there are expansions, i.e. net load is more than one PDCP PDU.It is understood that the value of E is not limited to 0 or 1, as long as the meaning represented by it can be distinguished.

The value of E and corresponding description in 5 fixed part of table

Value	Description
		0	There is no expansions, i.e. net load is a PDCP PDU
1	There are expansions, i.e. net load is multiple PDCP PDU

For indicate how the expansion for transmitting more than one PDCP PDU may include the E of PDCP PDU Length Indication domain LI (English: length indicator) and expansion.Wherein, PDCP PDU Length Indication domain LI can be similar with the definition mode in PDCP PDU Length Indication domain in the second way of modification, first PDCP PDU Length Indication domain LI is used to indicate the length of first PDCP PDU included by net load, second PDCP PDU Length Indication domain LI is used to indicate the length of second PDCP PDU included by net load, and so on.In specific implementation, the number of PDCP PDU Length Indication domain LI is variable, can be equal to PDCP PDU number, can also be one fewer than PDCP PDU number.From saving for expense angle, the latter is more preferable.In the present embodiment, selection does not indicate the length of the last one PDCP PDU to be specifically described, PDCP PDU Length Indication domain LI is expansion at this time, i.e. as only one PDCP PDU of net load, there is no LI expansions, moreover, the number of the E of the PDCP PDU Length Indication domain LI and expansion of expansion is identical when net load has more than one PDCP PDU.E is used to indicate whether there is also next E thereafter, i.e., whether there is also next PDCP PDU.In order to parse receiving end more easily to X2-U packet, E and LI can occur in pairs, i.e., and first LI in group E and LI indicates the length of first PDCP PDU, E indicates whether that there is also second PDCP PDU, when there is also second PDCP PDU for the E instruction in first group of E and LI, then first group of E and LI is also followed by second group of E and LI, LI in second group of E and LI indicates the length of second PDCP PDU, E indicates whether there is also third PDCP PDU, and so on.Specifically, the value of the E of expansion and corresponding description can be as shown in table 6 below.The value of E is 0, and expression does not follow thereafter next group of LI and E；The value of E is 1, and expression is still followed by thereafter next group of LI and E.Optionally, in another embodiment, the last one E can also be substituted with another PDCP PDU instructions field, as PDCP PDU terminates instructions field.

The value of E and corresponding description in 6 expansion of table

Value	Description
		0	Thereafter without E and LI
1	Thereafter still there are E and LI

Exemplary, when MeNB forwards a PDCP PDU to SeNB by X2 interface, the down user data X2 interface user plane protocol frame format is as shown in table 7 below.The E value of fixed part is 0, and expansion is not present, and the net load of X2-U packet is a PDCP PDU.

Frame format when 7 net load of table is a PDCP PDU

When MeNB forwards two PDCP PDU to SeNB by X2 interface, the down user data X2 interface user plane protocol frame format is as shown in table 8 below.The E value of fixed part is 1, indicates that, there are expansion, the net load of X2-U packet is multiple PDCP PDU.First E value of expansion is 0, indicate which is followed by LI behind there is no E and LI；The LI1 of expansion indicates first PDCP PDU length in net load.SeNB can parse first PDCP PDU after receiving the X2-U packet according to LI1, and remaining net load is then second PDCP PDU.

Since LI accounts for 11 in the present embodiment, and frame format is all that can pass through zero padding with byte-aligned Mode achieve the purpose that byte-aligned, for example, can be in LI₁The alignment of zero padding below, i.e. Padding in table 8.

Frame format when 8 net load of table is two PDCP PDU

When MeNB forwards three PDCP PDU to SeNB by X2 interface, the down user data X2 interface user plane protocol frame format is as shown in table 9.The E value of fixed part is 1, indicates that, there are expansion, the net load of X2-U packet is multiple PDCP PDU.First E value of expansion be 1, indicate which is followed by LI behind there are E and LI；The LI1 of expansion indicates first PDCP PDU length in net load.Second E value of expansion is 0, indicate which is followed by LI behind there is no E and LI；The LI2 of expansion indicates second PDCP PDU length in net load.SeNB can successfully parse first and second PDCP PDU after receiving the X2-U packet according to the instruction of LI1 and LI2, and remaining net load is then third PDCP PDU.

Frame format when 9 net load of table is three PDCP PDU

Since LI accounts for 11 in the present embodiment, and frame format is all with byte-aligned, so when the PDCP PDU passed is even number, the E and LI of expansion are odd number, it is preferably neat with spot patch after last group of E and LI, to meet frame with the rule of byte-aligned.When the PDCP PDU passed is odd number, the E and LI of expansion are even number, and every two groups of E and LI just account for 3 bytes, byte-aligned may be implemented, and carry out polishing without zero filling.The frame format of specific odd number group E and LI can be such as the following table 10 Shown, the frame format of even number set E and LI can be as shown in table 11 below.

10 down user data X2 interface user plane protocol frame format (odd number LI) of table

11 down user data X2 interface user plane protocol frame format (even number LI) of table

The above are the numbers of PDCP PDU Length Indication domain LI to be equal to the case where PDCP PDU number subtracts 1, i.e., does not indicate the length of the last one PDCP PDU.When the number of PDCP PDU Length Indication domain LI is equal to PDCP PDU number, indicate the length of the last one PDCP PDU, PDCP PDU Length Indication domain LI is also fixed part at this time, i.e. as only one PDCP PDU of net load, fixed part exists simultaneously E and LI, when net load has more than one PDCP PDU, the number of the E of the PDCP PDU Length Indication domain LI and expansion of expansion is still identical.The information of a PDCP PDU in each group of E and LI instruction net load.

Specifically, the number of PDCP PDU Length Indication domain LI is equal to the case where PDCP PDU number subtracts 1 Under, when MeNB group X2-U packet, can complete following steps accordingly: 1) E (0 or 1) of fixed part is written in the PDCP PDU number forwarded as needed；2) the PDCP PDU number and length forwarded as needed, which determines how, writes expansion (E and LI).

After SeNB receives X2-U packet: 1) reading the E of fixed part to determine whether there is expansion；2) expansion if it exists, then parse all PDCP PDU according to each E and LI of expansion.

It is understood that

1) LI length is not limited to 11, can specify the length of LI according to actual needs, and specific frame format is similar with above example, and the mode that zero filling can also be used carries out polishing, to realize byte-aligned.

2) position of E+LI combination is not limited to this exemplary description, for example, being also possible to before X2-U Sequence Number.

3) each group of E and LI can be E before LI, be also possible to E after LI.

This modification mode increases fixed extension flag position E on the basis of the X2 interface user plane protocol frame format that TS 36.425 is defined, and increases expansion in head dynamic.The composition of PDCP PDU in the net load of X2-U packet can be effectively identified by this modification mode, to indicate that SeNB effectively parses X2-U packet and obtains each PDCP PDU.

Any modification mode is both for downlink data transmission described in above embodiments.It further include the transmission of upstream data in dual link scene.The embodiment of the present invention two, for the transmission of the upstream data in dual link scene.UE obtains radio resource from MeNB and SeNB simultaneously, and data distribution to MeNB and SeNB are uploaded simultaneously.As shown in fig. 7, one or more than one RLC SDU is carried by X2-U packet and is transmitted to MeNB in X2-U packet net load after the data that SeNB reports UE resolve to RLC SDU, RLC SDU, that is, PDCP PDU at this time.The data that MeNB forwards the UE data reported and SeNB at PDCP layers converge, and are ranked up, and sequentially report upper layer network element after the completion.It is understood that also can be applied to the modification of the frame format for transmitting uplink data above in relation to any modification mode of downlink data transmission description.It is that field relevant with this scene of transmitting uplink data can be defined in frame format with the difference in above embodiments.For example, existing PDU Type has been defined two values, one is the DL USER DATA for downlink data transmission being previously noted, and another kind is STATUS REPORT, to distinguish application scenarios, can define a kind of new PDU Type:UL USER DATA, It is corresponding with transmitting uplink data.

It can be understood that, in the dual link scene that above embodiments one and embodiment two describe, MeNB and SeNB defer to LTE protocol, cellular communications networks are belonged to, and any one modification mode described in above embodiments can also be applied to defer to the communication between the radio reception device of different agreement.The embodiment of the present invention three, by taking the radio reception device under LTE and WLAN realizes the scene of dual link as an example, as shown in figure 8, the radio reception device in cellular communications networks is eNB, the radio reception device in WLAN is AP.It is similar with the scheme of embodiment two with above embodiments one for the shunting and the convergence of the PDCP layer for uplink of the PDCP layer of downlink transfer.Difference is, the not instead of X2 interface of the interface between eNB and AP, Xw interface.The logic interfacing that Xw interface defines between eNB and AP can be wireline interface, or wireless interface.In AP the receiving end of Xw interface by after one or more than one PDCP PDU entrained in received Xw-U packet parses, as a whole by each PDCP PDU, be handed down to UE after carrying out the existing flow processing of AP.After UE is received, after handling according to existing process the data received, each PDCP PDU is obtained, the part PDCP PDU then received with UE from eNB is converged, and the application layer of the UE is uploaded to after sequence.Any one definition mode mentioned in definition and above-described embodiment due to the frame format for Xw interface is identical, and details are not described herein.

In handoff scenario, can also there be the case where data packet transmission is carried out by X2 interface between two base stations, for example, the PDCP SDU not yet sent can be forwarded to target eNB by X2 interface using GTP-U agreement by source eNB, complete to send by target eNB.Existing realization is to forward only one PDCP SDU from source eNB to target eNB every time, leads to inefficiency.In order to realize that source eNB forwards more than one PDCP SDU to target eNB, it is also applicable that any one and data packet described in above-described embodiment transmit the relevant mode modified to frame format.The embodiment of the present invention four is described so that source eNB in handoff scenario sends data packet to target eNB as an example.The embodiment of the present invention can continue to use the technical solution of above embodiments one, two, three, source eNB sends the X2-U packet for carrying one or more than one PDCP SDU packet using modified frame format to target eNB, and modified frame format can indicate that target eNB carries out parsing to X2-U packet according to frame format to obtain each PDCP SDU packet carried in X2-U packet.It is that field relevant with this application scenarios is switched can be defined in frame format with the difference in above embodiments.For example, defining PDU Type relevant with this application scenarios is switched is 3 for difference application scenarios, it can filling out the PDU Type in frame format is 3, tool Body surface, which shows, to use binary zero 011, and other modes also can be used.

Specifically, one or more than one PDCP SDU to be forwarded is packaged into an X2-U packet by source eNB, and any one according to the above modification mode fills in corresponding X2 interface user plane protocol frame format in handoff procedure.After target eNB receives X2-U packet, the corresponding field in X2 interface user plane protocol frame is parsed, parsing X2-U packet obtains each PDCP SDU.

It using this programme, after target eNB receives the X2-U packet for carrying multiple PDCP SDU packets of source eNB transmission, can successfully parse, improve efficiency of transmission.

In summary embodiment, the embodiment of the present invention five give a kind of data transmission method, radio reception device and communication system.In the embodiment of the present invention, radio reception device refers to the equipment that user equipment is wirelessly connected into cable network (such as core net) by realization in cordless communication network.Sender is referred to as the first radio reception device, and recipient is referred to as the second radio reception device.It is understood that the first radio reception device can be, but not limited to as MeNB, SeNB, AP or source eNB, the second radio reception device be can be, but not limited to as SeNB, MeNB, AP or target eNB.The data packet transmitted is referred to as protocol data packet or interface data packet, can be, but not limited to GTP-U packet or X2-U packet, data packet entrained by the data packet net load is referred to as payload data packet, can be, but not limited to PDCP PDU, PDCP SDU or RLC SDU.First radio reception device, the second radio reception device, protocol data packet and payload data packet be specifically what can the scene according to applied by this method, radio reception device and communication system and determine.Furthermore, the embodiment of the present invention is not limited to LTE communication system, apply also for other communication systems, such as UMTS, it can also be applied to the case where other dual links shunt, such as in rlc layer, MAC layer or IP layers are shunted, accordingly, the data packet forwarded is RLC PDU, MAC PDU or IP data packet, related agreement is also not necessarily limited to GTP-U agreement, it for example can be IP tunneling protocol, control and provisioning of wireless access points (English: Control and Provisioning of Wireless Access Points, referred to as CAPWAP agreement) or 802.3 agreements etc., interface involved in receiving-transmitting sides is also not necessarily limited to X2 or Xw interface.

Illustratively, Fig. 9 shows a kind of flow diagram of data transmission method.Data transmission method shown in Fig. 9 uses any one in the above modified frame format, and existing primary convective journey is illustrated.It is as shown in Figure 9:

S101, the first radio reception device send an interface data packet to the second radio reception device by the interface between the second radio reception device, the net load of the interface data packet includes N number of payload data packet, N is the integer more than or equal to one, and the head of the interface data packet includes at least the information (may be simply referred to as quantity information) for being used to indicate the quantity of the payload data packet.

S102, the second radio reception device pass through interface data packet described in the interface between the first radio reception device, the interface data packet is parsed according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header, obtains each payload data packet.

Further, the head of interface data packet further includes the information (may be simply referred to as length information) of the length of each payload data packet at least N-1 payload data packet being used to indicate in N number of.In step 102, the second radio reception device can also be parsed the interface data packet according to quantity information and length information.

It can be understood that, it, can be only by indicating that the information of the quantity of payload data packet obtains each payload data packet to achieve the purpose that the second radio reception device successfully parses interface data packet in interface data packet under size (alternatively referred to as length) unanimous circumstances of each payload data packet.

Optionally, the information for being used to indicate the quantity of the payload data packet can be the actual quantity of payload data packet, such as subtract 1 (N-1) using the actual quantity N or actual quantity of m bit (m is the integer more than or equal to 1) one domain representation payload data packet of composition, it may be information corresponding with the actual quantity of payload data packet, t bit composition is such as utilized for indicating the domain of 1 payload data packet, shares the N number of payload data packet of N number of domain representation or with N-1 payload data packet of N-1 domain representation.It can also achieve the purpose that the quantity for indicating the payload data packet using other modes, for example actual quantity in a domain representation part payload data packet and multiple domains respectively indicate the mode that each payload data packet in the payload data packet of part combines, and can not limit herein.

Optionally, the information (may be simply referred to as length information) of the length of each payload data packet at least N-1 payload data packet being used to indicate in N number of may include the information of the length of 1 payload data packet of at least N-1 instruction, and the information of 1 payload data packet of each instruction can be the physical length of 1 payload data packet or the one-to-one information of physical length with 1 payload data packet.When for the latter, the second radio reception device can basis and the corresponding information of physical length and its corresponding relationship between physical length parsed.Wherein, indicate that the information of the length of 1 payload data packet can use n bit (n is the integer more than or equal to 1) one domain representation of composition, the physical length of N-1 payload data packet of N-1 domain representation is utilized altogether, in this way, remaining part is n-th payload data packet in net load, alternatively, utilizing the physical length of the N number of payload data packet of N number of domain representation altogether.The information for being used to indicate the length of 1 payload data packet can be arranged by the transmission sequence of payload data packet in net load.

When aforementioned quantity information, which is used, forms domain (alternatively referred to as field) expression using m bit (m is integer more than or equal to 1), the quantity information can be placed in frame format before mentioned length information, so that the second radio reception device first receives quantity information, length information is then received.When aforementioned quantity information forms the domain for being used for indicating 1 payload data packet using t bit, share the N number of payload data packet of N number of domain representation or with N-1 payload data packet of N-1 domain representation come when indicating, in frame format, the information for indicating the length of the payload data packet can be followed by after indicating the domain of 1 payload data packet, make the domain for indicating 1 payload data packet and indicates that the information of the length of the payload data packet occurs in groups, further, can occur according to the transmission sequence of payload data packet in net load, to facilitate the second radio reception device according to the parsing of quantity information and length information progress interface data packet.

Specifically, quantity information can be the PDCP PDU quantity instructions field Number of PDCP PDU in previous embodiment, or the extension bits E of fixed part, the extension bits E of fixed part and the extension bits E of expansion.Length information can be the PDCP PDU Length Indication domain LI in previous embodiment.The quantity information specifically position in frame and value, can also be with reference to the description in previous embodiment, and details are not described herein.

Optionally, first radio reception device can be MeNB, second radio reception device can be SeNB, interface data packet can be X2-U packet, payload data packet can be PDCP PDU, or, first radio reception device can be SeNB, second radio reception device can be MeNB, interface data packet can be X2-U packet, payload data packet can be RLC SDU (namely PDCP PDU), or, first radio reception device can be eNB, second radio reception device can be AP, since the interface between eNB and AP is Xw interface, the interface data packet transmitted by the interface is properly termed as Xw-U (Xw user face) packet, payload data packet can be PDCP PDU, or, first radio reception device It can be source eNB, the second radio reception device can be target eNB, and interface data packet can be X2-U packet, and payload data packet can be PDCP SDU, can also have other scenes, it will not be described here.

The data transmission method provided through the embodiment of the present invention can make the first radio reception device and second Multiple payload data packets are transmitted between radio reception device in an interface data packet, improve efficiency of transmission.

In order to realize data transmission method provided in an embodiment of the present invention, it needs to modify to existing first radio reception device and the second radio reception device, the first radio reception device is set to carry out filling in and encapsulating for interface data packet according to any one aforementioned modified frame format, it is set to carry one or more payload data packets and indicate information accordingly, second radio reception device can be parsed according to the interface data packet that the instruction information butt joint in corresponding frame format is received, and obtain corresponding each payload data packet.It is understood that both can be used as the first radio reception device (sender) as radio reception device entity, the second radio reception device (recipient) can also be used as.Therefore, the same radio reception device physically, may include encapsulation and parse two-part modification.

The method provided according to embodiments of the present invention, as shown in Figure 10, the radio reception device provided in the embodiment of the present invention may include Transmit-Receive Unit 1001 and processing unit 1002.Wherein, processing unit 1002 is for encapsulating a first interface data packet, the net load of the first interface data packet includes N number of first payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information (may be simply referred to as the first quantity information) for being used to indicate the quantity of the first payload data packet；Transmit-Receive Unit 1001 is used to send the first interface data packet to another radio reception device.Further, the head of first interface data packet can also include the information (may be simply referred to as the first length information) of each of at least N-1 the first payload data packets being used to indicate in N number of length of first payload data packet.

Transmit-Receive Unit 1001 can be also used for receiving a second interface data packet from another radio reception device, the net load of the second interface data packet includes S the second payload data packets, S is the integer more than or equal to one, and the head of the second interface data packet includes at least the information (may be simply referred to as the second quantity information) for being used to indicate the quantity of the second payload data packet；Processing unit 1002 can be also used for parsing the second interface data packet according to the information for the quantity for being used to indicate the second payload data packet entrained by the second interface data packet header, obtain each second payload data packet.Further, the head of second interface data packet can also include the information (may be simply referred to as the second length information) of each of at least S-1 the second payload data packets being used to indicate in S length of the second payload data packet.Processing unit 1002 can be also used for parsing the second interface data packet according to the second quantity information entrained by the second interface data packet header and the second length information, obtain each second payload data packet.

As a kind of implementation, the function of Transmit-Receive Unit 1001 be can be considered through transmission circuit or the realization of the special chip of transmitting-receiving.Processing unit 1002 by dedicated processes chip, processing circuit, processor or general-purpose chip it is contemplated that realized.

As another implementation, it may be considered that realize radio reception device provided in an embodiment of the present invention using the mode of general purpose computer.It will realize that the program code of 1002 function of Transmit-Receive Unit 1001 and processing unit stores in memory, processor realizes the function of Transmit-Receive Unit 1001 and processing unit 1002 by the code in execution memory.

Concept relevant to technical solution provided in an embodiment of the present invention involved in radio reception device shown in Figure 10 is explained and is described in detail referring to the description as described in these contents in preceding method or other embodiments, is not repeated herein.

Radio reception device provided in an embodiment of the present invention may be implemented to transmit multiple payload data packets in an interface data packet between another radio reception device, to improve efficiency of transmission.

The method provided according to embodiments of the present invention, the embodiment of the present invention also provide a kind of communication system comprising the first radio reception device and the second radio reception device above-mentioned.

Wherein, first radio reception device is used to send an interface data packet to the second radio reception device, the net load of the interface data packet includes N number of payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information (may be simply referred to as quantity information) for being used to indicate the quantity of the payload data packet；

Second radio reception device parses the interface data packet according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header, obtains each payload data packet for receiving the interface data packet.

Further, the head of interface data packet further includes the information (may be simply referred to as length information) of the length of each payload data packet at least N-1 payload data packet being used to indicate in N number of.Second radio reception device can be also used for parsing the interface data packet according to quantity information and length information.

Communication system provided in an embodiment of the present invention may be implemented to transmit multiple payload data packets between two radio reception devices in an interface data packet, to improve efficiency of transmission.

It is understood that the number occurred in embodiment is repaired such as embodiment one, two, three, four or five Change mode one, two or three, merely to description is convenient, does not represent the superiority and inferiority between scheme.

Skilled artisans appreciate that, any technical method (technology techniques) can be used to indicate in information and signal, such as: data (data), it instructs (instructions), it orders (command), information (information), signal (signal), bit (bit), symbol (symbol) and chip (chip) can pass through voltage, electric current, electromagnetic wave, magnetic field or magnetic grain (magnetic particles), or light field or light bead (optical particles), or above any combination indicates.

Art technology it is any it will also be appreciated that the various illustrative components, blocks (illustrative logical block) listed of the embodiment of the present invention and step (step) can by electronic hardware, computer software, or both combination realized.Such function is that the design requirement for depending on specific application and whole system is realized by hardware or software.Those skilled in the art can be used various methods and realize the function, but this realization is understood not to the range beyond protection of the embodiment of the present invention for every kind of specific application.

Various illustrative logical blocks described in the embodiment of the present invention, unit and circuit can pass through general processor, digital signal processor, specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components or above-mentioned any combination of design carry out implementation or operation described function.General processor can be microprocessor, and optionally, which may be any traditional processor, controller, microcontroller or state machine.Processor can also be realized by the combination of computing device, such as digital signal processor and microprocessor, multi-microprocessor, and one or more microprocessors combine a digital signal processor core or any other like configuration to realize.

The step of method described in the embodiment of the present invention or algorithm, can be directly embedded into the combination of hardware, the software unit that processor executes or the two.Software unit can store in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this field in other any form of storaging mediums.Illustratively, storaging medium can be connect with processor, so that processor can read information from storaging medium, and can be to storaging medium stored and written information.Optionally, storaging medium can also be integrated into the processor.Processor and storaging medium can be set in ASIC, and ASIC can be set in base station.Optionally, processor and storaging medium can also be set It is placed in the different components in base station.

In one or more exemplary designs, above-mentioned function described in the embodiment of the present invention can be realized in hardware, software, firmware or any combination of this three.If realized in software, these functions can store on the medium with computer-readable, or be transferred on a computer readable medium in the form of one or more instructions or code forms.Computer readable medium includes computer storaging medium and convenient for so that computer program is allowed to be transferred to from a place telecommunication media in other places.Storaging medium can be any general or special computer can be with the useable medium of access.Such as, such computer readable media can include but is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage devices or it is other it is any can be used for carry store with instruct or data structure and it is other can be by general or special computer or the medium of general or special processor reading form program code.Furthermore, any connection can be properly termed computer readable medium, for example, if software is to pass through a coaxial cable, optical fiber computer, twisted pair, Digital Subscriber Line (DSL) or be also included in the defined computer readable medium with wireless way for transmitting such as example infrared, wireless and microwaves from a web-site, server or other remote resources.The disk (disk) and disk (disc) includes compress disk, radium-shine disk, CD, DVD, floppy disk and Blu-ray Disc, and disk is usually with magnetic replicate data, and disk usually carries out optically replicated data with laser.Combinations of the above also may be embodied in computer readable medium.

The foregoing description of description of the invention can make art technology is any to can use or realize the contents of the present invention, any modification based on disclosure is all considered as this field it will be apparent that basic principle described in the invention can be applied in other deformations without departing from inventive nature and range of the invention.Therefore, content disclosed in this invention is not limited solely to described embodiment and design, can be extended to and principle of the present invention and the consistent maximum magnitude of disclosed new feature.

Claims (20)

1. A kind of radio reception device, which is characterized in that for the radio reception device for user equipment wirelessly to be accessed cable network, which includes Transmit-Receive Unit (1001) and processing unit (1002),

   The processing unit is for encapsulating a first interface data packet, the net load of the first interface data packet includes N number of first payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information for being used to indicate the quantity of the first payload data packet；

   The Transmit-Receive Unit is used to send the first interface data packet to another radio reception device by the interface between another radio reception device.
2. Radio reception device according to claim 1, which is characterized in that the head of the first interface data packet can also include the information of the length of each of at least N-1 the first payload data packets being used to indicate in N number of.
3. Radio reception device according to claim 1 or 2, which is characterized in that the information of the quantity for being used to indicate the first payload data packet is a domain, is filled with the total quantity N of the first payload data packet；Alternatively,

   The information for being used to indicate the quantity of the first payload data packet is N number of domain, and for each domain representation there are a corresponding first payload data packet, different domains corresponds to the first different payload data packets.
4. Radio reception device described in any one of -3 according to claim 1, it is characterized in that, the information of the length of each of at least N-1 being used to indicate in N number of the first payload data packets is N-1 domain, the length of the corresponding first payload data packet of each domain representation one, different domains corresponds to the first different payload data packets, or

   The information of the length of each of at least N-1 being used to indicate in N number of the first payload data packets is N number of domain, and the length of the corresponding first payload data packet of each domain representation one, different domains corresponds to the first different payload data packets.
5. Radio reception device described in any one of -4 according to claim 1, which is characterized in that the first payload data packet includes the information for being sent to user equipment, alternatively, including from the received information of user equipment.
6. Radio reception device described in any one of -5 according to claim 1, it is characterized in that, the Transmit-Receive Unit is also used to a second interface data packet by the interface between another radio reception device from another radio reception device, the net load of the second interface data packet includes S the second payload data packets, S is the integer more than or equal to one, and the head of the second interface data packet includes at least the information for being used to indicate the quantity of the second payload data packet；

   Processing unit is also used to parse the second interface data packet according to the information for the quantity for being used to indicate the second payload data packet entrained by the second interface data packet header, obtains S the second payload data packets.
7. Radio reception device according to claim 6, it is characterized in that, the head of the second interface data packet further includes the information of the length of each of at least S-1 the second payload data packets being used to indicate in S, the processing unit is also used to parse the second interface data packet according to the information of the information and the length of each of at least S-1 the second payload data packets being used to indicate in S of the quantity for being used to indicate the second payload data packet entrained by the second interface data packet header, obtains S the second payload data packets.
8. Radio reception device according to any one of claims 1-7, which is characterized in that the base station is the base station in cellular communications networks, alternatively, the access point in Wireless LAN (WLAN).
9. A kind of communication system, it is characterised in that it includes the first radio reception device and the second radio reception device that are connected by interface, first radio reception device and the second radio reception device are all used to that user equipment wirelessly to be accessed cable network, wherein

   First radio reception device, for sending an interface data packet to the second radio reception device by the interface, the net load of the interface data packet includes N number of payload data packet, N is the integer more than or equal to one, and the head of the first interface data packet includes at least the information for being used to indicate the quantity of the payload data packet；With

   Second radio reception device, for passing through interface data packet described in the interface, the interface data packet is parsed according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header, obtains N number of payload data packet.
10. Communication system according to claim 9, which is characterized in that the head of the interface data packet It further include the information of the length of each of at least N-1 payload data packet being used to indicate in N number of, the information that the second radio reception device can be also used for the length of each of the information according to the quantity for being used to indicate the payload data packet and at least N-1 payload data packet being used to indicate in N number of parses the interface data packet.
11. Communication system according to claim 9 or 10, which is characterized in that the information of the quantity for being used to indicate the payload data packet is a domain, is filled with the total quantity N of the payload data packet；Alternatively,

    The information for being used to indicate the quantity of the payload data packet is N number of domain, and there are a corresponding payload data packet, different domains to correspond to different payload data packets for each domain representation.
12. The communication system according to any one of claim 9-11, it is characterized in that, the information of the length of each of at least N-1 payload data packet being used to indicate in N number of is N-1 domain, the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets, or

    The information of the length of each of at least N-1 payload data packet being used to indicate in N number of is N number of domain, and the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets.
13. The communication system according to any one of claim 9-12, which is characterized in that first radio reception device is the source base station in handoff scenario, and second radio reception device is the target BS in handoff scenario；Alternatively,

    First radio reception device and the second radio reception device are the radio reception device in dual link scene.
14. The communication system according to any one of claim 9-13, it is characterized in that, first radio reception device and the second radio reception device are the base station in cellular communications networks, or, first radio reception device is the base station in cellular communications networks, and second radio reception device is the access point in WLAN, or, first radio reception device is the access point in WLAN, and second radio reception device is the base station in cellular communications networks.
15. A kind of method of data transmission characterized by comprising

    Second radio reception device comes from first nothing by the interface between the second radio reception device One interface data packet of line access device, the net load of the interface data packet include N number of payload data packet, and N is the integer more than or equal to one, and the head of the interface data packet includes at least the information for being used to indicate the quantity of the payload data packet；

    Second radio reception device parses the interface data packet according to the information for the quantity for being used to indicate the payload data packet entrained by the interface data packet header, obtains N number of payload data packet.
16. According to the method for claim 15, it is characterized in that, the head of the interface data packet further includes the information of the length of each of at least N-1 payload data packet being used to indicate in N number of, and the information that the second radio reception device can be also used for the length of each of the information according to the quantity for being used to indicate the payload data packet and at least N-1 payload data packet being used to indicate in N number of parses the interface data packet.
17. Method according to claim 15 or 16, which is characterized in that the information of the quantity for being used to indicate the payload data packet is a domain, is filled with the total quantity N of the payload data packet；Alternatively,

    The information for being used to indicate the quantity of the payload data packet is N number of domain, and there are a corresponding payload data packet, different domains to correspond to different payload data packets for each domain representation.
18. Method described in any one of 5-17 according to claim 1, it is characterized in that, the information of the length of each of at least N-1 payload data packet being used to indicate in N number of is N-1 domain, the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets, or

    The information of the length of each of at least N-1 payload data packet being used to indicate in N number of is N number of domain, and the length of the corresponding payload data packet of each domain representation one, different domains corresponds to different payload data packets.
19. Method described in any one of 5-18 according to claim 1, which is characterized in that first radio reception device is the source base station in handoff scenario, and second radio reception device is the target BS in handoff scenario；Alternatively,

    First radio reception device and the second radio reception device are the radio reception device in dual link scene.
20. Method described in any one of 5-19 according to claim 1, which is characterized in that first radio reception device and the second radio reception device are the base station in cellular communications networks, alternatively, described first Radio reception device is the base station in cellular communications networks, and second radio reception device is the access point in WLAN, alternatively, first radio reception device is the access point in WLAN, second radio reception device is the base station in cellular communications networks.