WO2011020409A1 - Method and system for data transmission, donor evolved nodeb, ralay equipment and evolved packet core network node - Google Patents

Abstract

A method and system for data transmission, Donor evolved NodeB (DeNB), relay equipment and evolved packet core network node are disclosed by embodiments in the present invention. The data transmission method includes the steps of: receiving data transmitted to a DeNB via a bearer of a first equipment; mapping the data to a bearer of a second equipment according to a recorded mapping relationship between bearers of the first equipment and those of the second equipment, and transmitting the data via the bearer of the second equipment. When the first equipment is a relay equipment and the second equipment is a User Equipment (UE); or, the first equipment is a UE and the second equipment is a relay equipment, by using the embodiments in the present invention, the DeNB can transmit and receive data via bearers of the UE directly, and need not pass through the evolved packet core network node of the relay equipment, thereby under the Relay architecture, optimizing data transmission path of the UE, reducing router overhead and improving transmission efficiency.

Description

 Data transmission method, system, donor base station, relay device and evolved packet core network node. The application is filed on August 19, 2009, the Chinese Patent Office, the application number is 200910166281.7, and the invention name is "data transmission method, system, donor base station". Priority of Chinese Patent Application for "Relaying Device and Evolved Packet Core Network Node", the entire contents of which are incorporated herein by reference. The present invention relates to the field of communications technologies, and in particular, to a data transmission method, system, a donor base station, a relay device, and an evolved packet core network node. Background of the invention

User equipment (User Equipment; hereinafter referred to as UE) accesses wireless access in the Long Term Evolution (LTE)/System Architecture Evolution (hereinafter referred to as SAE) After the network, an end-to-end evolved packet system (Evolved Packet System; hereinafter referred to as EPS) bearer is established between the UE and the radio access network, and all data of the UE is transmitted to the external network through the EPS bearer. Moreover, once the data of the UE is mapped to an end-to-end EPS bearer, it can only be transmitted on the mapped end-to-end EPS bearer, and will not be exchanged to other one or more EPS 7 at any intermediate node. Loaded.

With the development of LTE, the LTE evolution technology LTE-A (Long Term Evolution-Advanced; hereinafter referred to as LTE-A) aims to provide a system with more powerful network performance than the LTE system. In order to further improve the wireless signal coverage quality of the system in the hotspot area of the cell based on the existing LTE system, improve the user throughput and improve the user experience, a new type of wireless relay technology is introduced. In the LTE-A technology, The corresponding relay device is a relay node (hereinafter referred to as: RN) or a relay station (relay station; the following cartridge is called: RS). After accessing the relay station, the conventional base station may be referred to as a donor base station (Door evolved NodeB; hereinafter referred to as DeNB), and the link between the UE and the relay station is called an access link, and the relay station and the donor base station The link between them is called a backhaul link. Of course, the UE can also directly communicate with the donor base station, and the link between the UE and the donor base station is called a direct link (Direct Link

 In the LTE-A system, the main purpose of introducing a relay station is to provide a backhaul link for the UE, that is, to assist the UE to access the network node DeNB. In the prior art, the UE and the UE accessing the DeNB must pass the complete end-to-end EPS bearer of the RN to reach the user mobility management entity and the data gateway of the UE. That is to say, the complete end-to-end EPS bearer of the RN, RN<--> DeNB<--> RN's Serving Gateway (hereinafter referred to as: all serve as the relay channel of the UE).

 When the bearer of the UE changes, for example, the UE adds a new bearer, or modifies the quality of service (Quality of Service; QoS) attribute of the original bearer, etc., which may result in the complete RN as a relay channel. The end-to-end EPS 7|load needs to be changed. For example, the RN needs to add a new bearer, or modify the QoS attributes of the EPS bearer of the original RN. The complete end-to-end 7-year change of the RN must be handled by the RN's Mobility Management Entity (hereinafter referred to as MME) and the RN's SGW/PGW.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: The complete end-to-end EPS bearer of the RN (SGW/PGW of RN<->DeNB<>RN) acts as a relay channel of the UE. The data transmission path of the UE is complicated, and the transmission delay is increased, and the transmission efficiency is reduced. When the change of the bearer of the UE causes the complete end-to-end bearer of the R as the relay channel to be changed, the DeNB cannot directly modify the bearer of the backhaul link interface (also referred to as the Un interface) according to the requirements of the UE, but must be Evolved Packet Core network (hereinafter referred to as EPC) node of the RN, for example: SGW/PGW and MME of the RN And, even if the DeNB can perceive the change information of the bearer of the UE, the DeNB must interact with the EPC node of the R, for example, the MME of the RN to perform the corresponding operation, which increases the signaling complexity and leads to additional Control delay. Summary of the invention

 Embodiments of the present invention provide a data transmission method, system, a donor base station, a relay device, and an evolved packet core network node, so as to optimize a data transmission path of a user equipment, reduce route overhead, and improve transmission efficiency.

 The embodiment of the invention provides a data transmission method, including:

 Receiving data transmitted by the bearer of the first device to the donor base station;

 And mapping the data to the bearer of the second device according to the recorded mapping relationship between the bearer of the first device and the bearer of the second device, and transmitting the data by using the bearer of the second device.

 The embodiment of the invention further provides a bearer modification method, including:

 And receiving, by the evolved packet core network node corresponding to the user equipment, a bearer modification instruction sent by the donor base station corresponding to the user equipment according to the recorded node mapping information of the user equipment and the node mapping information of the donor base station, where the bearer modification command carries the modified According to the bearer parameter of the user equipment, and the mapping relationship between the bearer of the user equipment and the bearer of the relay device, when the bearer parameter of the relay device is modified, according to The bearer parameter of the modified user equipment modifies the bearer parameters of the relay device.

 An embodiment of the present invention further provides a donor base station, including:

 a receiving module, configured to receive data sent by the bearer of the first device to the donor base station; and a recording module, configured to record a mapping relationship between the bearer of the first device and the bearer of the second device;

a transmission module, configured to perform, according to the recording, the first device, and the second device Mapping the bearer of the device, mapping the data received by the receiving module to the bearer of the second device, and transmitting the data by using the bearer of the second device.

 The embodiment of the invention further provides a relay device, including:

 a data receiving module, configured to receive uplink data sent by the user equipment by using a bearer of the user equipment;

 a relationship record module, configured to record a mapping relationship between the bearer of the user equipment and the bearer of the relay device;

 a data transmission module, configured to map uplink data received by the data receiving module to the relay device according to a mapping relationship between a bearer of the user equipment and a bearer of the relay device recorded by the relationship recording module And transmitting, by the bearer of the relay device, the uplink data to the donor base station.

 An embodiment of the present invention further provides an evolved packet core network node, including:

 An information recording module, configured to record node mapping information of the bearer of the user equipment and the donor base station;

 a sending module, configured to send downlink data or a bearer modification command to a donor base station corresponding to the user equipment according to the bearer mapping information of the bearer of the user equipment and the donor base station recorded by the information recording module, where the bearer modification command carries The bearer parameter of the modified user equipment; the uplink data receiving module is configured to receive uplink data sent by the donor base station corresponding to the user equipment by using the bearer of the user equipment.

 The embodiment of the present invention further provides a data transmission system, including: a user equipment, the foregoing donor base station, the foregoing relay device, and the evolved packet core network node.

After receiving the data sent by the bearer of the first device, the donor base station maps the data to the bearer of the second device, and transmits the data by using the bearer of the second device. When the first device is a relay device, and the second device is a user device, or the first device is a user device, and the second device is a relay device, the donor base station can directly send and receive through the bearer of the user equipment. Data, without having to go through the evolved packet core of the relay device The network node, in the Relay architecture, optimizes the data transmission path of the user equipment, reduces the routing overhead, and improves the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

 1 is a flow chart of an embodiment of a data transmission method according to the present invention;

 2 is a flow chart of another embodiment of a data transmission method according to the present invention;

 3 is a schematic diagram of an embodiment of an LTE-A network according to the present invention;

 4 is a flowchart of still another embodiment of a data transmission method according to the present invention;

 FIG. 5 is a flowchart of an embodiment of a bearer modification method according to the present invention; FIG.

 6 is a schematic structural diagram of an embodiment of a donor base station according to the present invention;

 7 is a schematic structural diagram of another embodiment of a donor base station according to the present invention;

 8 is a schematic structural diagram of an embodiment of a relay device according to the present invention;

 FIG. 9 is a schematic structural diagram of an embodiment of an evolved packet core network node according to the present invention; FIG. 10 is a schematic structural diagram of an embodiment of a data transmission system according to the present invention. The embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. An embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of an embodiment of a data transmission method according to the present invention, including: Step 101: The donor base station receives data sent by the bearer of the first device to the donor base station.

 Step 102: The donor base station maps the data to the bearer of the second device according to the mapping relationship between the bearer of the first device and the bearer of the second device, and transmits the data by using the bearer of the second device.

 In this embodiment, the donor base station records the mapping relationship between the bearer of the first device and the bearer of the second device. Specifically, the donor base station can record the mapping relationship between the bearer identifier of the bearer of the first device and the bearer identifier of the bearer of the second device. . After receiving the data sent by the bearer of the first device, the donor base station may map the data to the bearer of the second device according to the mapping relationship, and transmit the data by using the bearer of the second device.

 In the foregoing embodiment, after receiving the data sent by the bearer of the first device, the donor base station maps the data to the bearer of the second device, and transmits the data by using the bearer of the second device. When the first device is a relay device, and the second device is a user device, or the first device is a user device, and the second device is a relay device, the donor base station can directly send and receive through the bearer of the user equipment. Data, without having to transit through the evolved packet core network node corresponding to the relay device; even if the core network node corresponding to the relay device or the corresponding node function is integrated/implemented in the donor base station, the donor base station can directly pass through the user equipment The bearer transmits and receives data, and does not need to be transferred by the core network node corresponding to the relay device integrated in the donor base station or the module that implements the corresponding node function, thereby optimizing the data transmission path of the user equipment and reducing the routing under the Relay architecture. Overhead, improve transmission efficiency.

 FIG. 2 is a flowchart of another embodiment of a data transmission method according to the present invention. In this embodiment, the first device is a relay device, the second device is a user device, and the data is uplink data. As shown in FIG. 2, this embodiment includes:

 Step 201: The donor base station receives uplink data sent by the relay device to the donor base station by using the bearer of the relay device.

In this embodiment, at least the bearer of the user equipment and the relay device need to be recorded in the relay device. The mapping relationship between the bearer identifier of the bearer of the user equipment and the bearer identifier of the bearer of the relay device is received by the relay device. The uplink data sent by the user equipment through the bearer of the user equipment is received. Afterwards, the relay device may map the uplink data sent by the user equipment to the bearer of the relay device according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device, and the bearer of the relay device The uplink data is sent to the donor base station.

 Taking an LTE-A network as an example, FIG. 3 is a schematic diagram of an embodiment of an LTE-A network according to the present invention. In FIG. 3, a solid line (^~~^) indicates a path of the RN, that is, a data transmission path of the RN; The dotted line ( ) indicates the transmission path of the signaling of the RN; the dotted line ( ) indicates the path of the EPS bearer of the UE, that is, the transmission path of the data of the UE;

( ■ ■ ) indicates the transmission path of the signaling of the UE.

 In the LTE-A network shown in FIG. 3, the relay device RN needs to record at least the mapping relationship between the EPS bearer of the UE and the RN on the Un interface. Specifically, the RN can record the 7-bearing of the EPS 7 of the UE. The RN is configured to identify the 7-carrier mapping relationship between the RN and the RN on the Un interface. The Un interface is the radio interface between the RN and the donor base station DeNB. After receiving the uplink data sent by the UE through the Uu interface of the UE, the RN may According to the mapping relationship between the recorded EPS bearer of the UE and the bearer of the Un interface, the uplink data is mapped to the RN on the 7th interface of the Un interface, and the uplink data is sent to the DeNB through the RN on the 7th interface of the Un interface. The Uu interface is a radio interface between the UE and the R.

 Step 202: The donor base station maps the uplink data to the bearer of the user equipment according to the mapping relationship between the bearer of the relay device and the bearer of the user equipment, and groups the address of the core network node according to the evolved corresponding user equipment. The uplink data is transmitted to the evolved packet core network node corresponding to the user equipment by the bearer of the user equipment.

In this embodiment, the donor base station records the mapping relationship between the bearer of the relay device and the bearer of the user equipment, and the specific path of the bearer of the user equipment, that is, the user equipment passes through the relay device and the donor base station, and the evolution corresponding to the user equipment a path connecting the core network nodes; specifically, The donor base station may record the mapping relationship between the bearer identifier of the bearer of the user equipment and the bearer identifier of the bearer of the relay device, and the address of the evolved packet core network node corresponding to the user equipment, including the evolved packet core network node corresponding to the user equipment. Tunnel Endpoint Identifier (hereinafter referred to as TEID) and Internet Protocol (IP) address.

 After receiving the uplink data sent by the relay device, the donor base station maps the uplink data sent by the relay device to the bearer of the user equipment according to the recorded mapping relationship between the bearer of the relay device and the bearer of the user equipment, and according to the recorded The address of the evolved packet core network node corresponding to the user equipment, and the uplink data is transmitted to the evolved packet core network node corresponding to the user equipment by using the bearer of the user equipment. That is, the donor base station can directly send the uplink data from the user equipment sent by the relay device to the evolved packet core network node corresponding to the user equipment, and no longer transit through the evolved packet core network node corresponding to the relay device. Even if the core network node or the corresponding node function corresponding to the relay device is integrated/implemented in the donor base station, the donor base station can directly send and receive data through the bearer of the user equipment without having to be integrated by the relay device in the donor base station. The corresponding core network node or the module that implements the corresponding node function transits, thereby optimizing the data transmission path of the user equipment, reducing the routing overhead, and improving the transmission efficiency.

 For example, the LTE-A network shown in FIG. 3 is used as an example. In the LTE-A network, the evolved packet core network node in this embodiment may be an SGW/PGW. The DeNB needs to record the mapping relationship between the EPS bearer of the UE and the bearer of the Un interface, and the specific path of the EPS bearer of the UE. Specifically, the DeNB can record the bearer identifier of the EPS bearer of the UE and the bearer identifier of the bearer of the RN on the Un interface. The mapping relationship and the address of the SGW/PGW corresponding to the UE include the TEID and IP address of the SGW/PGW corresponding to the UE.

After receiving the uplink data from the UE sent by the RN, the DeNB directly maps the uplink data from the UE sent by the RN from the Un interface to the EPS of the UE according to the mapping relationship between the recorded EPS bearer of the UE and the bearer of the Un interface. Carrying, and transmitting the uplink data to the UE by using the EPS of the UE according to the address of the SGW/PGW corresponding to the recorded UE Corresponding SGW/PGW. That is, the DeNB can directly send the uplink data from the UE sent by the RN to the SGW/PGW corresponding to the UE, and no longer transit through the SGW/PGW of the R, thereby optimizing the data transmission path of the UE and reducing the route. Overhead, improve transmission efficiency.

 In the foregoing embodiment, the donor base station may send the uplink data from the user equipment sent by the relay device to the evolved packet core network node corresponding to the user equipment directly through the bearer of the user equipment, without having to go through the evolved packet corresponding to the relay device. The core network node transits; even if the core network node corresponding to the relay device or the corresponding node function is integrated/implemented in the donor base station, the donor base station can directly send and receive data through the bearer of the user equipment, without having to be in the donor base station The core network node corresponding to the integrated relay device or the module that implements the corresponding node function transits, thereby optimizing the data transmission path of the user equipment under the Relay architecture, reducing the routing overhead and improving the transmission efficiency.

 FIG. 4 is a flowchart of still another embodiment of a data transmission method according to the present invention. In this embodiment, the first device is a user equipment, the second device is a relay device, and the data is downlink data. As shown in FIG. 4, the embodiment includes:

 Step 401: The donor base station receives downlink data sent by the evolved packet core network node corresponding to the user equipment to the donor base station corresponding to the user equipment by using the bearer of the user equipment.

 In this embodiment, the evolved packet core network node corresponding to the user equipment records the bearer mapping information of the bearer of the user equipment and the donor base station. Specifically, the evolved packet core network node corresponding to the user equipment may record the bearer identifier of the bearer of the user equipment. The address of the donor base station corresponding to the user equipment, and the address of the donor base station corresponding to the user equipment includes the TEID and IP address of the donor base station.

 When the evolved packet core network node corresponding to the user equipment needs to send the downlink data to the user equipment, the evolved packet core network node corresponding to the user equipment passes the bearer mapping information of the bearer of the user equipment and the donor base station, and the bearer of the user equipment is used. The downlink data is sent to a donor base station corresponding to the user equipment.

Taking the LTE-A network shown in Figure 3 as an example, the above evolved packet core network node is SGW/PGW, the SGW/PGW corresponding to the UE records the node mapping information of the EPS bearer of the UE and the DeNB. Specifically, the SGW/PGW corresponding to the UE may record the address of the EPS carried by the UE and the address of the DeNB corresponding to the UE. Corresponding relationship, the address of the DeNB corresponding to the UE includes the TEID and IP address of the DeNB.

 When the SGW/PGW corresponding to the UE needs to send the downlink data to the UE, the SGW/PGW corresponding to the UE sends the downlink data to the EPS 7 of the UE according to the recorded EPS mapping of the UE and the node mapping information of the DeNB. The DeNB corresponding to the UE.

 Step 402: The donor base station maps the downlink data to the bearer of the relay device according to the recorded mapping relationship between the bearer of the user equipment and the bearer of the relay device, and transmits the downlink data to the relay by using the bearer of the relay device. device. The relay device that receives the downlink data sent by the donor base station maps the downlink data to the bearer of the user equipment according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device, and the bearer of the user equipment is The downlink data is sent to the user equipment.

 In this embodiment, the donor base station records the mapping relationship between the bearer of the relay device and the bearer of the user equipment. Specifically, the donor base station can record the mapping relationship between the bearer identifier of the bearer of the user equipment and the bearer identifier of the bearer of the relay device.

 After receiving the downlink data sent by the evolved packet core network node corresponding to the user equipment, the donor base station maps the downlink data to the bearer of the relay device according to the mapping relationship between the bearer of the relay device and the bearer of the user equipment. The bearer of the relay device transmits the downlink data to the relay device, and then the downlink device maps the downlink data to the bearer of the user equipment according to the mapping relationship between the bearer of the recorded relay device and the bearer of the user equipment. Sending the downlink data to the user equipment by using the bearer of the user equipment.

The LTE-A network shown in FIG. 3 is taken as an example. In the LTE-A network, the DeNB records the mapping relationship between the EPS bearer of the UE and the bearer of the RN on the Un interface. Specifically, the DeNB can record the EPS 7 of the UE. The mapping relationship between the 7i-loaded identifier and the RN's payload on the Un interface. After receiving the downlink data sent by the SGW/PGW corresponding to the UE, the DeNB according to the record The mapping between the EPS bearer of the UE and the bearer of the Un interface, mapping the downlink data to the bearer of the R interface on the Un interface, and transmitting the downlink data to the RN by using the R bearer on the Un interface. After receiving the downlink data, the RN maps the downlink data to the EPS bearer of the UE according to the mapping relationship between the bearer of the Un interface and the EPS bearer of the UE, and the downlink data is used by the EPS bearer of the UE. The Uu interface is sent to the UE. The Un interface is a radio interface between the RN and the DeNB, and the Uu interface is a radio interface between the UE and the RN.

 In the above embodiment, the donor base station may directly receive the downlink data sent by the evolved packet core network node corresponding to the user equipment, and then the donor base station may map the downlink data to the medium according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device. After being transmitted to the relay device, the relay device directly transmits the downlink data to the user equipment through the bearer of the user equipment, without having to transit through the evolved packet core network node corresponding to the relay device; The core network node or the corresponding node function corresponding to the device is integrated/implemented in the donor base station, and the donor base station can also directly send and receive data through the bearer of the user equipment, without the core corresponding to the relay device integrated in the donor base station. The network node or the module that implements the corresponding node function transits, thereby optimizing the data transmission path of the user equipment under the Relay architecture, reducing the routing overhead and improving the transmission efficiency.

 FIG. 5 is a flowchart of an embodiment of a bearer modification method according to the present invention. In this embodiment, the first device is a user equipment, and the second device is a relay device. As shown in FIG. 5, the embodiment includes: Step 501: The donor base station receives, according to the recorded node mapping information of the bearer of the user equipment and the donor base station, the evolved packet core network node corresponding to the user equipment, and the user equipment bears the bearer to the user equipment. A bearer modification command sent by the corresponding donor base station, where the bearer modification command carries the modified bearer parameter of the user equipment.

In this embodiment, the evolved packet core network node corresponding to the user equipment records the bearer mapping information of the bearer of the user equipment and the donor base station. Specifically, the evolved packet core network node corresponding to the user equipment may record the bearer identifier of the bearer of the user equipment. The donor base station corresponding to the user equipment Correspondence of the address, the address of the donor base station corresponding to the user equipment includes the donor base station

TEID and IP address, etc.

 When the bearer of the user equipment needs to be changed due to a change of the user equipment (for example, the addition or departure of the user equipment) or a change of the service of the user equipment (for example, the user equipment needs to be newly created, modified, or released), the user equipment corresponds to The evolved packet core network node may directly send a bearer modification command to the donor base station corresponding to the user equipment according to the recorded bearer mapping information of the user equipment and the node mapping information of the donor base station, where the bearer modification command carries the modified bearer parameter of the user equipment, The bearer parameters include the bearer identifier of the bearer of the user equipment and the QoS parameters of the bearer of the user equipment.

 For example, in the LTE-A network shown in FIG. 3, in the LTE-A network, the evolved packet core network node corresponding to the user equipment in this embodiment includes the MME corresponding to the UE, and the SGW/PGW corresponding to the UE. The MME corresponding to the UE records the node mapping information of the EPS bearer of the UE and the DeNB. Specifically, the MME corresponding to the UE may record the correspondence between the bearer identifier of the EPS 7 carried by the UE and the address of the DeNB corresponding to the UE, where the UE corresponds. The address of the DeNB includes the TEID and IP address of the DeNB, and the identifier (UE S 1 APID ) of the corresponding user equipment on the S 1 interface.

 The bearer of the UE needs to be changed (including the new bearer, the modified bearer, or the release bearer, etc.) due to the change of the UE (for example, the addition or departure of the UE) or the change of the service of the UE (for example, the UE needs to create, modify, or release the data bearer). In the operation, the MME corresponding to the UE may send a bearer modification command to the DeNB corresponding to the UE by using the bearer of the UE according to the recorded bearer mapping information of the UE and the node mapping information of the DeNB, where the bearer modification command carries the modified UE bearer parameter. The bearer parameter includes a bearer identifier of the bearer of the UE, a QoS parameter of the bearer of the UE, and the like.

Step 502: The donor base station determines, according to the modified bearer parameter of the user equipment, and the mapping relationship between the recorded bearer of the user equipment and the bearer of the relay device, according to the modified bearer parameter of the user equipment. The bearer parameters of the relay device are modified. In this embodiment, the donor base station records the mapping relationship between the bearer of the user equipment and the bearer of the relay device, and the bearer parameters of each bearer of the user equipment. After receiving the bearer modification command, the donor base station determines, according to the bearer parameter of the modified user equipment carried by the bearer modification command, and the mapping relationship between the recorded bearer of the user equipment and the bearer of the relay device, whether it is necessary to modify the relay device. The bearer parameter; specifically, if the bearer of the relay device on the Un interface cannot meet the bearer requirement of the user equipment, for example, the bearer of the original Un interface cannot meet the requirements of the user equipment for QoS and/or data rate, etc., the donor base station It is determined that the bearer of the relay device on the Un interface needs to be modified according to the bearer parameters of the user equipment.

 When it is determined that the bearer parameter of the relay device needs to be modified, the donor base station directly modifies the bearer parameter of the relay device according to the modified bearer parameter of the user equipment.

 The LTE-A network shown in FIG. 3 is taken as an example. In the LTE-A network, the DeNB records the mapping relationship between the EPS bearer of the UE and the bear of the R interface on the Un interface, and the bearer parameters of each bearer of the UE. The EPC node of the UE, for example, the bearer parameter of the modified UE carried by the DeNB according to the bearer modification command after receiving the bearer modification command, and the mapping relationship between the recorded EPS bearer of the UE and the bearer of the Un interface on the Un interface It is determined whether the bearer parameter of the bearer of the Un interface needs to be modified. When it is determined that the bearer parameter of the bearer of the Un interface is modified, the DeNB directly initiates a bearer management process of the Un interface on the Un interface, for example: Radio Resource Control (Radio Resource Control) Control; hereinafter referred to as: RRC) The connection reconfiguration process, which modifies the bearer parameters of the RN on the Un interface according to the modified bearer parameters of the UE. The Un interface is a radio interface between the RN and the DeNB.

In the foregoing embodiment, the donor base station may directly modify the user equipment carried according to the bearer modification command according to the bearer modification command sent by the evolved packet core network node corresponding to the user equipment, when determining that the bearer parameter of the relay device needs to be modified. Carrying parameters, modifying the bearer parameters of the relay device, and not processing the evolved packet core network node corresponding to the relay device; even if the core network node corresponding to the relay device or the corresponding node function is integrated/implemented in the In the donor base station, the donor base station may directly modify the bearer parameters of the relay device, and It is not necessary to process the core network node corresponding to the relay device integrated in the donor base station or the module that implements the corresponding node function, thereby simplifying the control of the signaling plane, and under the Relay architecture, the bearer of the user equipment is compressed. Management.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 FIG. 6 is a schematic structural diagram of an embodiment of a donor base station according to the present invention. The donor base station of this embodiment can implement the flow of the embodiment shown in FIG. 1 or FIG. 2 of the present invention. As shown in FIG. 6, the donor base station includes: a receiving module 61, a recording module 62, and a transmission module 63.

 The receiving module 61 can receive data sent by the bearer of the first device to the donor base station.

 The recording module 62 can record the mapping relationship between the bearer of the first device and the bearer of the second device. Specifically, the recording module 62 can record the mapping relationship between the bearer identifier of the bearer of the first device and the bearer identifier of the second device.

 The transmission module 63 may map the data received by the receiving module 61 to the bearer of the second device according to the mapping relationship between the bearer of the first device and the bearer of the second device recorded by the recording module 62, and transmit the data by using the bearer of the second device. .

 In an embodiment of the present invention, the receiving module 61 may receive uplink data sent by the relay device to the donor base station by using the bearer of the relay device;

 The recording module 62 is specifically configured to record a mapping relationship between the bearer of the relay device and the bearer of the user equipment, and is further configured to record an address of the evolved packet core network node corresponding to the user equipment;

The transmission module 63 may map the data received by the receiving module 61 to the bearer of the user equipment according to the mapping relationship between the bearer of the relay device recorded by the recording module 62 and the bearer of the user equipment, and corresponding to the user equipment recorded by the recording module 62. Evolving the address of the packet core network node, The bearer of the user equipment transmits the uplink data to an evolved packet core network node corresponding to the user equipment.

 In an embodiment of the present invention, the receiving module 61 may receive downlink data sent by the evolved packet core network node corresponding to the user equipment to the donor base station corresponding to the user equipment by using the bearer of the user equipment; The data received by the receiving module 61 is mapped to the bearer of the relay device according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device, and the downlink data is transmitted to the bearer of the relay device by using the bearer of the relay device. Relay device.

 In the above embodiment, after receiving the data transmitted by the bearer of the first device, the receiving module 61 maps the data to the bearer of the second device, and the transmitting module 63 transmits the data through the bearer of the second device. When the first device is a relay device, and the second device is a user device, or the first device is a user device, and the second device is a relay device, the donor base station can directly send and receive through the bearer of the user equipment. The data, without having to go through the evolved packet core network node of the relay device, optimizes the data transmission path of the user equipment under the Relay architecture, reduces the routing overhead, and improves the transmission efficiency.

 FIG. 7 is a schematic structural diagram of another embodiment of a donor base station according to the present invention. The donor base station in this embodiment can implement the process of the embodiment shown in FIG. 5 of the present invention. As shown in FIG. 7, the donor base station includes: a receiving module 71, a recording module 72, a transmission module 73, and a modification module 74.

 The receiving module 71 can receive data sent by the bearer of the first device to the donor base station.

 The recording module 72 can record the mapping relationship between the bearer of the first device and the bearer of the second device. Specifically, the recording module 72 can record the mapping relationship between the bearer identifier of the bearer of the first device and the bearer identifier of the second device.

The transmission module 73 may map the data received by the receiving module 71 to the bearer of the second device according to the mapping relationship between the bearer of the first device and the bearer of the second device recorded by the recording module 72, and transmit the data by using the bearer of the second device. . In this embodiment, the receiving module 71 may further receive, by the evolved packet core network node corresponding to the user equipment, a bearer modification instruction sent to the donor base station corresponding to the user equipment according to the recorded node mapping information of the user equipment and the donor base station. The bearer modification command carries the bearer parameters of the modified user equipment.

 At this time, the modification module 74 may determine, according to the modified bearer parameter of the user equipment received by the receiving module 71, and the mapping relationship between the bearer of the user equipment and the bearer of the relay device, when modifying the bearer parameter of the relay device, according to the modification. The bearer parameters of the subsequent user equipment modify the bearer parameters of the relay device.

 FIG. 8 is a schematic structural diagram of an embodiment of a relay device according to the present invention. As shown in FIG. 8, the relay device includes: a data receiving module 81, a relationship recording module 82, and a data transmission module 83.

 Specifically, the data receiving module 81 can receive the uplink data sent by the user equipment by using the bearer of the user equipment; the relationship record module 82 can record the mapping relationship between the bearer of the user equipment and the bearer of the relay device; the data transmission module 83 can record according to the relationship. The mapping between the bearer of the user equipment and the bearer of the relay device recorded by the module 82 is performed, and the uplink data received by the data receiving module 81 is mapped to the bearer of the relay device, and the uplink data is sent to the bearer of the relay device. Donor base station.

 The data receiving module 81 can also receive the downlink data sent by the donor base station by using the bearer of the relay device. In this case, the data transmission module 83 can also record the bearer of the user equipment and the bearer of the relay device according to the relationship record module 82. The mapping relationship is performed by mapping the downlink data received by the data receiving module 81 to the bearer of the user equipment, and transmitting the downlink data to the user equipment by using the bearer of the user equipment.

 In the above embodiment, the data transmission module 83 can directly transmit the uplink data from the user equipment to the donor base station through the bearer of the relay device, and send the downlink data to the user equipment by using the bearer of the user equipment, without having to go through the evolved group of the relay device. The core network node, thereby optimizing the data transmission path of the user equipment, improves data transmission efficiency.

FIG. 9 is a schematic structural diagram of an embodiment of an evolved packet core network node according to the present invention, as shown in FIG. As shown, the evolved packet core network node 9 includes: an information recording module 91, a transmitting module 92, and an uplink data receiving module 93.

 Specifically, the information recording module 91 may record the node mapping information of the bearer of the user equipment and the donor base station; the sending module 92 may correspond to the node mapping information of the user equipment recorded by the information recording module 91 and the node mapping information of the donor base station to the user equipment. The donor base station sends the downlink data or the bearer modification command, and the bearer modification command carries the modified bearer parameter of the user equipment. The uplink data receiving module 93 can receive the uplink data sent by the donor base station corresponding to the bearer of the user equipment.

 In the foregoing embodiment, the sending module 92 may directly send a bearer modification command to the donor base station corresponding to the user equipment, so that the donor base station may determine the need for the relay device according to the bearer modification command sent by the evolved packet core network node corresponding to the user equipment. When the bearer parameters are modified, the bearer parameters of the relay device are modified according to the bearer parameters of the modified user equipment carried by the bearer modification command, and the evolved packet core network node corresponding to the relay device is not required to be processed. The control of the signaling plane is simplified, and the management of the bearer of the user equipment is simplified under the Relay architecture.

 FIG. 10 is a schematic structural diagram of an embodiment of a data transmission system according to the present invention. As shown in FIG. 10, the data transmission system includes a user equipment 1001, a relay device 1002, a donor base station 1003, and a progress packet core network node 1004. The relay device 1002 can be implemented by the relay device of the embodiment shown in FIG. 8 of the present invention. The donor base station 1003 can be implemented by the donor base station of the embodiment shown in FIG. 6 or FIG. 7, and the evolved packet core network node 1004 can be implemented. It is implemented by the evolved packet core network node of the embodiment shown in FIG. 9 of the present invention.

Specifically, the relay device 1002 needs to record at least the mapping relationship between the bearer of the user equipment 1001 and the bearer of the relay device 1002; after receiving the uplink data sent by the user equipment 1001 through the bearer of the user equipment 1001, the relay device The mapping of the uplink data sent by the user equipment 1001 to the bearer of the relay device 1002 may be mapped to the bearer of the relay device 1002 according to the mapping relationship between the bearer of the user equipment 1001 and the bearer of the relay device 1002. The uplink data is transmitted to the donor base station 1003.

 The donor base station 1003 records the mapping relationship between the bearer of the relay device 1002 and the bearer of the user equipment 1001, and the specific path of the bearer of the user equipment 1001, that is, the user equipment 1001 passes through the relay device 1002 and the donor base station 1003, and the user equipment 1001 The path of the corresponding evolved packet core network node 1004 is connected; after receiving the uplink data sent by the relay device 1002, the donor base station 1003 sets the relay device according to the mapping relationship between the bearer of the recorded relay device 1002 and the bearer of the user equipment 1001. The uplink data sent by the user equipment 1001 is mapped to the bearer of the user equipment 1001, and the uplink data is transmitted to the user equipment 1001 through the bearer of the user equipment 1001 according to the address of the evolved packet core network node 1004 corresponding to the recorded user equipment 1001. The packet core network node 1004 is evolved. That is, the donor base station 1003 can directly send the uplink data from the user equipment 1001 sent by the relay device 1002 to the evolved packet core network node 1004 corresponding to the user equipment 1001, and no longer evolve through the relay device 1002. The packet core network node transits, thereby optimizing the data transmission path of the user equipment, reducing the routing overhead, and improving the transmission efficiency.

 The evolved packet core network node 1004 corresponding to the user equipment 1001 records the node mapping information of the bearer of the user equipment 1001 and the donor base station 1003. When the evolved packet core network node 1004 corresponding to the user equipment 1001 needs to send downlink data to the user equipment 1001, the user The evolved packet core network node 1004 corresponding to the device 1001 transmits the downlink data to the donor base station 1003 corresponding to the user equipment 1001 through the bearer of the user equipment 1001 according to the node mapping information of the user equipment 1001 and the donor base station 1003. .

The donor base station 1003 records the mapping relationship between the bearer of the relay device 1002 and the bearer of the user equipment 1001. After receiving the downlink data sent by the evolved packet core network node 1004 corresponding to the user equipment 1001, the donor base station 1003 according to the recorded relay device 1002. Carrying the mapping relationship with the bearer of the user equipment 1001, mapping the downlink data to the bearer of the relay device 1002, and transmitting the downlink data to the relay device 1002 through the bearer of the relay device 1002, and then by the relay device 1002 according to the bearer of the recorded relay device 1002 and the bearer of the user equipment 1001 Mapping the downlink data to the bearer of the user equipment 1001, through the user equipment

The bearer of 1001 transmits the above downlink data to the user equipment 1001.

 In this embodiment, the downlink data transmission does not need to be transited through the evolved packet core network node of the relay device 1002, so that the data transmission path of the user equipment 1001 is optimized under the relay architecture, the routing overhead is reduced, and the transmission efficiency is improved.

 In addition, when the user equipment 1001 changes (for example, the user equipment 1001 is added or removed) or the user equipment 1001 changes in the service (for example, the user equipment 1001 needs to create, modify, or release a data bearer), the bearer requirement of the user equipment 1001 is required. When the change is made, the evolved packet core network node 1004 corresponding to the user equipment 1001 can directly send a bearer modification command to the donor base station 1003 corresponding to the user equipment 1001 according to the recorded bearer mapping information of the user equipment 1001 and the donor base station 1003. The modification command carries the bearer parameter of the modified user equipment 1001, where the bearer parameter includes the bearer identifier of the bearer of the user equipment 1001 and the QoS parameter of the bearer of the user equipment 1001. The donor base station 1003 records the mapping relationship between the bearer of the user equipment 1001 and the bearer of the relay device 1002, and the bearer parameters of each bearer of the user equipment 1001. After receiving the bearer modification command, the donor base station 1003 determines, according to the bearer parameter of the modified user equipment 1001 carried by the bearer modification command, and the recorded mapping relationship between the bearer of the user equipment 1001 and the bearer of the relay device 1002, whether it needs to be modified. The bearer parameter of the relay device 1002; specifically, if the bearer of the relay device 1002 on the Un interface cannot meet the bearer requirement of the user equipment 1001, for example, the bearer of the original Un interface cannot satisfy the user equipment 1001 for QoS and/or data. For the requirement of the rate, etc., the donor base station 1003 determines that the bearer of the relay device 1002 on the Un interface needs to be modified according to the bearer parameters of the user equipment 1001.

When it is determined that the bearer parameter of the relay device 1002 needs to be modified, the donor base station 1003 directly modifies the bearer parameter of the relay device 1002 according to the modified bearer parameter of the user equipment 1001, and does not need the evolved packet corresponding to the relay device 1002. The processing of the core network node simplifies the control of the signaling plane. In the Relay architecture, the management of the bearer of the user equipment 1001 is simplified. The embodiment of the present invention provides a data transmission method, a system, a donor base station, a relay device, and an evolved packet core network node. In the description of the foregoing embodiment of the present invention, the LTE-A network is mainly taken as an example, but the present invention Embodiments are not limited to LTE-A networks. The data transmission method, system, donor base station, relay device, and evolved packet core network node provided by the embodiments of the present invention are also applicable to other networks, for example: Universal Mobile Telecommunications System (UMTS), global The mobile communication system and the Global System for Mobile Communications Enhanced Data Rate for GSM Evolution Radio Access Network (hereinafter referred to as GERAN) and other networks not listed.

 A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.

 Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

 It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the embodiments of the present invention. The technical solutions of the present invention may be modified or equivalently substituted, and the modified technical solutions may not deviate from the spirit and scope of the technical solutions of the present invention.

Claims

Rights request

 A data transmission method, comprising:

 Receiving data transmitted by the bearer of the first device to the donor base station;

 And mapping the data to the bearer of the second device according to the recorded mapping relationship between the bearer of the first device and the bearer of the second device, and transmitting the data by using the bearer of the second device.

 The method according to claim 1, wherein the first device is a relay device, the second device is a user equipment, and the data is uplink data.

 The receiving the data sent by the bearer of the first device to the donor base station includes: receiving, by the relay device, uplink data sent by the bearer of the relay device to the donor base station;

 The step of the relay device transmitting uplink data to the donor base station by using the bearer of the relay device includes:

 Receiving, by the relay device, uplink data sent by the user equipment by using the bearer of the user equipment;

 And the relay device maps the uplink data sent by the user equipment to the bearer of the relay device according to the recorded mapping relationship between the bearer of the user equipment and the bearer of the relay device, and passes the The bearer of the relay device transmits the uplink data to the donor base station.

 The method according to claim 2, wherein the transmitting, by the bearer of the second device, the data comprises:

 And transmitting, by the bearer of the user equipment, the uplink data to an evolved packet core network node corresponding to the user equipment, according to the recorded address of the evolved packet core network node corresponding to the user equipment.

 The method according to claim 1, wherein the first device is a user equipment, the second device is a relay device, and the data is downlink data.

The receiving, by the bearer of the first device, the data sent to the donor base station includes: receiving, by the user equipment, the evolved packet core network node, by using the bearer of the user equipment, setting, to the user The downlink data sent by the corresponding donor base station;

 The step of transmitting the downlink data to the donor base station corresponding to the user equipment by using the bearer of the user equipment by the evolved packet core network node corresponding to the user equipment includes:

 The evolved packet core network node corresponding to the user equipment sends the downlink data to the donor base station corresponding to the user equipment by using the bearer of the user equipment according to the recorded node mapping information of the user equipment and the donor base station. .

 The method according to claim 4, wherein the transmitting, by the bearer of the second device, the data comprises:

 Transmitting, by the bearer of the relay device, the downlink data to the relay device, so that the relay device according to the recorded mapping relationship between the bearer of the user equipment and the bearer of the relay device The downlink data is mapped to the bearer of the user equipment, and the downlink data is sent to the user equipment by using the bearer of the user equipment.

 6. A method for modifying a bearer, characterized in that it comprises:

 And receiving, by the evolved packet core network node corresponding to the user equipment, a bearer modification instruction sent by the donor base station corresponding to the user equipment according to the recorded node mapping information of the user equipment and the node mapping information of the donor base station, where the bearer modification command carries the modified According to the bearer parameter of the user equipment, and the mapping relationship between the bearer of the user equipment and the bearer of the relay device, when the bearer parameter of the relay device is modified, according to The bearer parameter of the modified user equipment modifies the bearer parameters of the relay device.

 7. A donor base station, comprising:

 a receiving module, configured to receive data sent by the bearer of the first device to the donor base station; and a recording module, configured to record a mapping relationship between the bearer of the first device and the bearer of the second device;

a transmission module, configured to map data received by the receiving module to the second device according to a mapping relationship between a bearer of the first device and a bearer of the second device recorded by the recording module On the bearer, the data is transmitted by the bearer of the second device.

 The donor base station according to claim 7, wherein the receiving module is specifically configured to receive uplink data sent by the relay device to the donor base station by using the bearer of the relay device.

 The donor base station according to claim 7, wherein the recording module is specifically configured to record a mapping relationship between a bearer of the relay device and a bearer of the user equipment, and further used to record the corresponding The address of the evolved packet core network node.

 The donor base station according to claim 8 or 9, wherein the transmission module is specifically configured to: according to the mapping relationship between the bearer of the relay device and the bearer of the user equipment recorded by the recording module, The data received by the receiving module is mapped to the bearer of the user equipment, and the uplink data is sent by the bearer of the user equipment according to the address of the evolved packet core network node corresponding to the user equipment recorded by the recording module. Transmitting to an evolved packet core network node corresponding to the user equipment.

 The donor base station according to claim 7, wherein the receiving module is configured to: receive, by the user equipment, an evolved packet core network node, by using a bearer of the user equipment, to a donor base station corresponding to the user equipment. The downlink data sent.

 The donor base station according to claim 9 or 11, wherein the transmission module is specifically configured to: according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device recorded by the recording module, The data received by the receiving module is mapped to the bearer of the relay device, and the downlink data is transmitted to the relay device by the bearer of the relay device.

 The donor base station according to claim 11, wherein the receiving module is further configured to receive, by the evolved packet core network node corresponding to the user equipment, a node mapping of the bearer of the user equipment and a donor base station according to the recorded And a bearer modification command sent by the donor base station corresponding to the user equipment, where the bearer modification command carries the modified bearer parameter of the user equipment.

The donor base station according to claim 13, further comprising: a modifying module, configured to: according to the modified bearer parameter of the user equipment received by the receiving module And determining, according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device, the modification of the bearer parameter of the relay device, according to the modified bearer parameter of the user equipment The bearer parameters are modified.

 15. A relay device, comprising:

 a data receiving module, configured to receive uplink data sent by a user equipment by using a bearer of the user equipment;

 a relationship record module, configured to record a mapping relationship between the bearer of the user equipment and the bearer of the relay device;

 a data transmission module, configured to map uplink data received by the data receiving module to the relay device according to a mapping relationship between a bearer of the user equipment and a bearer of the relay device recorded by the relationship recording module And transmitting, by the bearer of the relay device, the uplink data to the donor base station.

 The relay device according to claim 15, wherein the data receiving module is further configured to receive downlink data sent by a donor base station by using a bearer of the relay device;

 The data transmission module is further configured to map the downlink data received by the data receiving module to the user equipment according to the mapping relationship between the bearer of the user equipment and the bearer of the relay device recorded by the relationship recording module. And transmitting, by the bearer of the user equipment, the downlink data to the user equipment.

 17. An evolved packet core network node, comprising:

 An information recording module, configured to record node mapping information of the bearer of the user equipment and the donor base station;

a sending module, configured to send downlink data or a bearer modification command to a donor base station corresponding to the user equipment according to the bearer mapping information of the bearer of the user equipment and the donor base station recorded by the information recording module, where the bearer modification command carries The bearer parameter of the modified user equipment; the uplink data receiving module is configured to receive uplink data sent by the donor base station corresponding to the user equipment by using the bearer of the user equipment.

A data transmission system, comprising: a user equipment, a donor base station according to any one of claims 7-14, a relay device according to claim 15 or 16, and according to claim 17. The evolved packet core network node.