WO2015100557A1

WO2015100557A1 - Backhaul data transmission method, device and system

Info

Publication number: WO2015100557A1
Application number: PCT/CN2013/090958
Authority: WO
Inventors: 李明超; 熊新; 韩广林; 施艺
Original assignee: 华为技术有限公司
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2015-07-09
Also published as: CN105264963A; CN105264963B

Abstract

The present invention relates to the field of communications. Disclosed in an embodiment of the present invention are a backhaul data transmission method, device and system for improving backhaul capacity, thus improving system performance. The method of the present invention comprises: an intermediate node receives the backhaul data of a relay node transmitted by an evolved node B (eNB) in a first multimedia broadcast single frequency network (MBSFN) subframe, the position of the first MBSFN subframe being the same as the position of one or more downlink MBSFN subframes of the backhaul link of the relay node; receiving a first scheduling instruction message transmitted by the relay node, the first scheduling instruction message being used to indicate the uplink resource of the access link of the relay node used to transmit the backhaul data; and according to the first scheduling instruction message, transmitting the backhaul data to the relay node in the first subframe, the position of the first subframe being the same as the position of one or more uplink transmission subframes of the access link.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method, apparatus, and system for transmitting backhaul data. Background technique

In the LTE (Long Term Evolution) system, a wireless relay (relay) is introduced to expand the system capacity and expand the coverage of the network. After the introduction of the relay, the network architecture of the LTE system is as shown in FIG. 1 , including: an eNB (evolved Node B), a relay, and a UE (User Equipment), where the UE includes: UE (hereinafter referred to as "Macro-UE, macro UE"), UE under relay coverage (hereinafter referred to as "R-UE"); In this network architecture, the link can be divided according to different service objects It is: Direct link, access link and backhaul link. The carrier frequency used by the access link can be the same as the carrier frequency used by the backhaul link. The relay in the network is called an in-band relay, and the relay used in the network with the carrier frequency used by the access link and the carrier frequency used by the backhaul link is called an out-band relay. The relay is composed of a UE module and an eNB module. As shown in Figure 2. In the downlink direction, the UE module receives the downlink data sent by the eNB on the backhaul link, and then sends the downlink data to the R-UE on the access link through the eNB module. For the in-band relay, due to the backhaul chain The carrier frequency used by the road is the same as the carrier frequency used by the access link. Therefore, if the eNB module sends downlink data to the R-UE while the UE module receives the downlink data sent by the eNB, the eNB module transmitting the downlink data will cause interference to the UE module receiving the downlink data. Similarly, in the uplink direction, if While the eNB module receives the uplink data sent by the R-UE, the UE module sends the uplink data to the eNB, and then the UE module sends the uplink data to cause interference to the eNB module to receive the uplink data. Generally, the backhaul link may be used. The internal interference of the relay caused by receiving/transmitting data simultaneously with the access link is called self-interference. In order to avoid self-interference, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) determines the access link and backhaul link of the in-band relay using TDM (Test Data Management). In the downlink direction, the relay only receives the data sent by the eNB at the same time, or only sends data to the R-UE. In the uplink direction, the relay only receives the data sent by the R-UE at the same time, or only sends data to the eNB. Further, in order to solve the collision problem that the relay and the R-UE monitor the PDCCH time, the 3GPP decides to use the MB SFN (Multicast Broadcast Single Frequency Network) subframe for backhaul transmission. The in-band relay's access link and backhaul link use TDM, and the backhaul transmission is limited by using MB SFN subframes for backhaul transmission. For example: In the TDD (Time Division Duplexing) system, if the eNB only uses #4, #9 in one radio frame (including #0~#9, 10 subframes in total) as the downlink transmission of the backhaul link. The subframe is used to transmit downlink (backhaul) data on the backhaul link, so that when the traffic of the R-UE is large, the backhaul capacity is easily limited. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, apparatus, and system for transmitting backhaul data to improve backhaul capacity, thereby improving system performance. To achieve the above objective, the embodiment of the present invention uses the following technical solution: In a first aspect, a method for transmitting backhaul data is provided, including: sending, by an intermediate node, a base station in a first multimedia broadcast single frequency network MB SFN subframe receiving base station The backhaul data of the relay node, the location of the first MB SFN subframe is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node; receiving the first schedule sent by the relay node An indication message, where the first scheduling indication message is used to indicate an access link of the relay node used by the backhaul data Uplink resources;

And sending, by the first scheduling indication message, the backhaul data to the relay node in a first subframe, where a location of the first subframe is related to one or more uplink transmission subframes of the access link. The location is the same.

With reference to the first aspect, in a first possible implementation, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first MBSFN subframe, the method further includes: receiving, by the base station, An MBSFN subframe configuration message, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe; and configuring the first MBSFN subframe according to the MBSFN subframe configuration message. With reference to the first aspect, in a second possible implementation manner, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, the method further includes And receiving, by the first MBSFN subframe, a second scheduling indication message that is sent by the base station by using a physical downlink control channel PDCCH of the base station, where the second scheduling indication message is used to indicate that the intermediate node passes the The physical downlink shared channel PDSCH receives the backhaul data; the intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, and the method includes: the intermediate node according to the second scheduling indication The message, in the first multimedia broadcast single frequency network MBSFN subframe, receives the backhaul data of the relay node sent by the base station by using the PDSCH of the base station. With reference to the first aspect, in a third possible implementation, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, the method further includes : Receiving a secondary link setup message sent by the base station; the auxiliary link setup message is used to establish a first auxiliary link for information interaction between the intermediate node and the base station, and for the middle a second auxiliary link for performing information exchange between the node and the relay node; establishing the first auxiliary link and the second auxiliary link according to the auxiliary link setup message. With reference to the first aspect, the first possible implementation manner of the first aspect, and the third possible implementation manner, in a fourth possible implementation manner, the receiving, The message includes: receiving, by using a PDCCH of the relay node, a first scheduling indication message sent by the relay node. With reference to the first aspect, the first possible implementation manner of the first aspect, and the fourth possible implementation manner, in a fifth possible implementation manner, the first scheduling sent by the receiving relay node Before the message is indicated, the method further includes: sending a buffer report message to the relay node, where the buffer report message is used to enable the relay node to send the first scheduling indication message to the intermediate node. With reference to the first aspect, the first possible implementation manner of the first aspect, and the fifth possible implementation manner, in a sixth possible implementation manner, the access link and the backhaul link Working in TDM through time division multiplexing mode. With reference to the first aspect, the first possible implementation manner of the first aspect, and the sixth possible implementation manner, in a seventh possible implementation manner, the carrier frequency and the carrier used by the access link are The carrier frequency used by the backhaul link is the same. With reference to the first aspect, the first possible implementation manner of the first aspect, and the seventh possible implementation manner, in an eighth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. In a second aspect, a method for transmitting backhaul data is provided, including: determining, by a base station, first backhaul data of a relay node that is sent to an intermediate node; sending, in the first multimedia broadcast single frequency network MBSFN subframe, to the intermediate node The first backhaul data, where the location of the first MBSFN subframe is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node, so that the intermediate node according to the first scheduling indication Transmitting, by the first subframe, the first backhaul data to the relay node in a first subframe; the first scheduling indication message is sent by the relay node to the intermediate node, and is used to indicate that the first backhaul data is transmitted The uplink resource of the access link of the relay node used; the location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link.

With reference to the second aspect, in a first possible implementation manner, the method further includes: determining second backhaul data of the relay node that is sent to the relay node; or one of the backhaul links The plurality of downlink MBSFN subframes send the second backhaul data to the relay node.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation, the sending, by the first multimedia broadcast single frequency network MBSFN subframe, to the intermediate node Before the first backhaul data, the method further includes: sending an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe, and the MBSFN subframe configuration message is used by The intermediate node is configured to configure the first MBSFN subframe.

With the second possible implementation of the second aspect, in a third possible implementation, the sending, by the intermediate node, the MBSFN subframe configuration message includes: the load on the backhaul link is greater than or equal to In the case of a preset threshold, an MBSFN subframe configuration message is sent to the intermediate node. With reference to the second aspect, in a fourth possible implementation, the method further includes: sending, by the first MBSFN subframe, a second scheduling indication message to the intermediate node by using a physical downlink control channel PDCCH of the base station And the second scheduling indication message is used to indicate that the intermediate node receives the first backhaul data on a physical downlink shared channel PDSCH of the base station.

With reference to the second aspect, the first possible implementation manner of the second aspect, and the fourth possible implementation manner, in the fifth possible implementation manner, the first multimedia broadcast single frequency network MBSFN sub Before the frame sends the first backhaul data to the intermediate node, the method further includes: sending a secondary link setup message to the intermediate node; to enable the intermediate node to establish a message according to the auxiliary link setup message a first auxiliary link for performing information interaction between the intermediate node and the base station, and a second auxiliary link for performing information interaction between the intermediate node and the relay node.

With reference to the second aspect, the first possible implementation manner of the second aspect, and the fifth possible implementation manner, in the sixth possible implementation manner, the first multimedia broadcast single frequency network The sending, by the MBSFN subframe, the first backhaul data to the intermediate node, includes: transmitting, by the physical downlink shared channel PDSCH of the base station, the first downlink broadcast network MBSFN subframe to the intermediate node A return trip data.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner, the resource used by the base station to send the first backhaul data is sent by the base station to the user equipment served by the base station The resources used in the downlink data are the same, and the resources used by the base station to send the first backhaul data include: a PDSCH of the base station, and the first MBSFN subframe.

Combining the second aspect, the first possible implementation of the second aspect, and the seventh In an eighth implementation manner, in the eighth possible implementation, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

The third aspect provides a method for transmitting backhaul data, including: the relay node sends a first scheduling indication message to the intermediate node, where the first scheduling indication message is used to indicate that the first backhaul data of the relay node is used for transmission. An uplink resource of the access link of the relay node, and configured to enable the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe; The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link; the first backhaul data is sent by the base station to the MBSFN subframe of the first multimedia broadcast single frequency network. An intermediate node, where a location of the first MBSFN subframe is the same as a location of one or more downlink MBSFN subframes of a backhaul link of the relay node;

Receiving the first backhaul data sent by the intermediate node in the first subframe.

With reference to the third aspect, in a first possible implementation, the method further includes: receiving, in the one or more downlink MBSFN subframes of the backhaul link, the second of the relay node sent by the base station Return data.

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation, before the sending, by the relay node, the first scheduling indication message to the intermediate node, the method further includes:

Receiving a buffer report message sent by the intermediate node, where the buffer report message is used to enable the relay node to send the first scheduling indication message to the intermediate node.

With reference to the third aspect, the first possible implementation manner of the third aspect, and the second possible implementation manner, in a third possible implementation manner, the relay node sends the first scheduling to the intermediate node Instructions, including:

The relay node passes the physical downlink control channel PDCCH of the relay node Sending a first scheduling indication message to the intermediate node.

With reference to the third aspect, the first possible implementation manner of the third aspect, and the third possible implementation manner, in a fourth possible implementation, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. In a fourth aspect, an intermediate node is provided, including:

a first receiving unit, configured to receive backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, where the location of the first MBSFN subframe and the backhaul link of the relay node One or more downlink MBSFN subframes have the same location;

a second receiving unit, configured to receive a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate an uplink resource of the access link of the relay node used by the backhaul data a sending unit, configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, where the location of the first subframe is one or more of the access link The positions of the uplink transmission subframes are the same. With reference to the fourth aspect, in a first possible implementation, the first receiving unit is further configured to receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes the first MBSFN The intermediate node further includes: a configuration unit, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message. With reference to the fourth aspect, in a second possible implementation, the first receiving unit is further configured to: in the first MBSFN subframe, receive, by using, a PDCCH that is sent by the base station by using a physical downlink control channel of the base station And a second scheduling indication message, where the second scheduling indication message is used to indicate that the intermediate node receives the backhaul data by using a physical downlink shared channel (PDSCH) of the base station; The first receiving unit is configured to: receive, according to the second scheduling indication message, a backhaul data of the relay node sent by the base station by using a PDSCH of the base station in a MBSFN subframe of the first multimedia broadcast single frequency network . With reference to the fourth aspect, in a third possible implementation, the first receiving unit is further configured to receive a secondary link setup message sent by the base station, where the auxiliary link setup message is used to establish a a first auxiliary link for performing information interaction between the intermediate node and the base station, and a second auxiliary link for performing information exchange between the intermediate node and the relay node; the intermediate node further includes And an establishing unit, configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link setup message. With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the third possible implementation manner, in the fourth possible implementation manner, the second receiving unit is specifically used to pass The PDCCH of the relay node receives the first scheduling indication message sent by the relay node. With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the fourth possible implementation manner, in a fifth possible implementation manner, the sending unit is further configured to: The relay node sends a buffer report message, and the cache report message is used to enable the relay node to send the first scheduling indication message to the intermediate node. With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the fifth possible implementation manner, in a sixth possible implementation manner, the access link and the backhaul link Working in TDM through time division multiplexing mode. With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the sixth possible implementation manner, in a seventh possible implementation manner, the carrier frequency used by the access link is The carrier frequency used by the backhaul link is the same. Combining the fourth aspect, the first possible implementation manner of the fourth aspect, and the seventh In an eighth implementation manner, in the eighth possible implementation, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module. In a fifth aspect, an intermediate node is provided, including: a receiver, configured to receive, in a first multimedia broadcast single frequency network MBSFN subframe, backhaul data of a relay node sent by a base station, where the first MBSFN subframe is located And a location of one or more downlink MBSFN subframes of the backhaul link of the relay node; and receiving a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate that the backhaul is transmitted An uplink resource of the access link of the relay node used by the data; a transmitter, configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link. With reference to the fifth aspect, in a first possible implementation, the receiver is further configured to: receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes the first MBSFN subframe The intermediate node further includes: a processor, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message. With reference to the fifth aspect, in a second possible implementation, the receiver is further configured to: receive, in the first MBSFN subframe, a second scheduling that is sent by the base station by using a physical downlink control channel PDCCH of the base station An indication message, the second scheduling indication message is used to indicate that the intermediate node receives the backhaul data by using a physical downlink shared channel (PDSCH) of the base station; the receiver is specifically configured to: according to the second scheduling indication message, Receiving backhaul data of the relay node sent by the base station by using the PDSCH of the base station in the MBSFN subframe of the first multimedia broadcast single frequency network. With reference to the fifth aspect, in a third possible implementation, the receiver is further configured to receive a secondary link setup message sent by the base station, where the auxiliary link setup message is used to establish a first auxiliary link for performing information exchange between the node and the base station, and a second auxiliary link for performing information exchange between the intermediate node and the relay node; the intermediate node further includes: And configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link setup message. With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, and the third possible implementation manner, in a fourth possible implementation, the receiver is specifically used to pass the relay node. The PDCCH receives the first scheduling indication message sent by the relay node. In combination with the fifth aspect, the first possible implementation manner of the fifth aspect, and the fourth possible implementation manner, in a fifth possible implementation manner, the transmitter is further used to The relay node sends a buffer report message, and the cache report message is used to enable the relay node to send the first scheduling indication message to the intermediate node. With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, and the fifth possible implementation manner, in a sixth possible implementation manner, the access link and the backhaul link Working in TDM through time division multiplexing mode. With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, and the sixth possible implementation manner, in a seventh possible implementation manner, the carrier frequency used by the access link is The carrier frequency used by the backhaul link is the same. With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, and the seventh possible implementation manner, in the eighth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. In a sixth aspect, a base station is provided, including: a determining unit, configured to determine first backhaul data of the relay node sent to the intermediate node;

a sending unit, configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, where a location of the first MBSFN subframe and a backhaul link of the relay node The location of the one or more downlink MBSFN subframes is the same; the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; Sending, by the relay node, the message to the intermediate node, and indicating an uplink resource of an access link of the relay node used by the first backhaul data; a location of the first subframe The locations of one or more uplink transmission subframes of the access link are the same. With reference to the sixth aspect, in a first possible implementation, the determining unit is further configured to: determine second backhaul data of the relay node that is sent to the relay node; Transmitting the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link. With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation, the sending unit is further configured to: send an MBSFN subframe configuration message to the intermediate node, where the MBSFN The subframe configuration message includes a location of the first MBSFN subframe, and the MBSFN subframe configuration message is used to configure the intermediate node to configure the first MBSFN subframe.

With the second possible implementation of the sixth aspect, in a third possible implementation, the sending unit is specifically configured to: when the load of the backhaul link is greater than or equal to a preset threshold, The intermediate node sends an MBSFN subframe configuration message.

With reference to the sixth aspect, in a fourth possible implementation, the sending unit is further configured to: pass the physical downlink control channel of the base station in the first MBSFN subframe The PDCCH sends a second scheduling indication message to the intermediate node, where the second scheduling indication message is used to indicate that the intermediate node receives the first backhaul data on a physical downlink shared channel PDSCH of the base station. With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, and the fourth possible implementation manner, in a fifth possible implementation manner, the sending unit is further configured to: Sending, by the node, a secondary link setup message, to enable the intermediate node to establish a first auxiliary link for information interaction between the intermediate node and the base station according to the auxiliary link setup message, and for the a second auxiliary link for information interaction between the intermediate node and the relay node. With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, and the fifth possible implementation manner, in the sixth possible implementation manner, the sending unit is specifically configured to be used in the first multiple The media broadcast single frequency network MBSFN subframe transmits the first backhaul data to the intermediate node by using a physical downlink shared channel PDSCH of the base station. With reference to the sixth possible implementation manner of the sixth aspect, in a seventh possible implementation, the sending unit sends the resource used by the first backhaul data and the user equipment that the base station serves the base station The resources used for transmitting the downlink data are the same, and the resources used by the sending unit to send the first backhaul data include: a PDSCH of the base station, and the first MBSFN subframe. With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, and the seventh possible implementation manner, in the eighth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. In a seventh aspect, a base station is provided, including:

a processor, configured to determine first backhaul data of the relay node sent to the intermediate node, and a transmitter, configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe The location of the first MBSFN subframe and the location The location of one or more downlink MBSFN subframes of the backhaul link of the relay node is the same; the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message according to the first scheduling indication message. The first scheduling indication message is sent by the relay node to the intermediate node, and is used to indicate an uplink resource of an access link of the relay node used by the first backhaul data; The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link. With reference to the seventh aspect, in a first possible implementation, the processor is further configured to: determine second backhaul data of the relay node that is sent to the relay node; Transmitting the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link. With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation, the transmitter is further configured to: send an MBSFN subframe configuration message to the intermediate node, where the MBSFN The subframe configuration message includes a location of the first MBSFN subframe, and the MBSFN subframe configuration message is used to configure the intermediate node to configure the first MBSFN subframe. With the second possible implementation of the seventh aspect, in a third possible implementation, the transmitter is specifically configured to: when the load of the backhaul link is greater than or equal to a preset threshold, The intermediate node sends an MBSFN subframe configuration message. With reference to the seventh aspect, in a fourth possible implementation, the transmitter is further configured to: send a second scheduling to the intermediate node by using a physical downlink control channel PDCCH of the base station in the first MBSFN subframe And the second scheduling indication message is used to indicate that the intermediate node receives the first backhaul data on a physical downlink shared channel PDSCH of the base station. With reference to the seventh aspect, the first possible implementation manner of the seventh aspect, and the fourth possible implementation manner, in the fifth possible implementation manner, the transmitter further And sending, to the intermediate node, a secondary link setup message, to enable the intermediate node to establish a first auxiliary chain for information interaction between the intermediate node and the base station according to the auxiliary link setup message. And a second auxiliary link for information exchange between the intermediate node and the relay node. With reference to the seventh aspect, the first possible implementation manner of the seventh aspect, and the fifth possible implementation manner, in the sixth possible implementation manner, the transmitter is specifically used in the first multiple The media broadcast single frequency network MBSFN subframe transmits the first backhaul data to the intermediate node by using a physical downlink shared channel PDSCH of the base station. With reference to the sixth possible implementation manner of the seventh aspect, in a seventh possible implementation, the resource used by the transmitter to send the first backhaul data and the user equipment that the base station serves the base station The resources used for transmitting the downlink data are the same, and the resources used by the transmitter to send the first backhaul data include: a PDSCH of the base station, and the first MBSFN subframe. With reference to the seventh aspect, the first possible implementation manner of the seventh aspect, and the seventh possible implementation manner, in the eighth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. The eighth aspect provides a relay node, including: a sending unit, configured to send a first scheduling indication message to the intermediate node, where the first scheduling indication message is used to indicate when the first backhaul data of the relay node is transmitted An uplink resource of the access link of the relay node, and configured to enable the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe; The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link; the first backhaul data is sent by the base station to the MBSFN subframe of the first multimedia broadcast single frequency network. An intermediate node, where a location of the first MBSFN subframe is the same as a location of one or more downlink MBSFN subframes of a backhaul link of the relay node; And a receiving unit, configured to receive the first backhaul data that is sent by the intermediate node in the first subframe.

With reference to the eighth aspect, in a first possible implementation, the receiving unit is further configured to receive, by the base station, the relay node that is sent by the base station in one or more downlink MBSFN subframes of the backhaul link Second return data. With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in a second possible implementation, the receiving unit is further configured to: receive a cache report message sent by the intermediate node, where the cache report is The message is configured to enable the relay node to send the first scheduling indication message to the intermediate node. With reference to the eighth aspect, the first possible implementation manner of the eighth aspect, and the second possible implementation manner, in a third possible implementation manner, the sending unit is specifically used to The physical downlink control channel PDCCH of the node sends a first scheduling indication message to the intermediate node.

With reference to the eighth aspect, the first possible implementation manner of the eighth aspect, and the third possible implementation manner, in the fourth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. According to a ninth aspect, a relay node is provided, including: a transmitter, configured to send a first scheduling indication message to an intermediate node, where the first scheduling indication message is used to indicate when the first backhaul data of the relay node is transmitted An uplink resource of the access link of the relay node, and configured to enable the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe; The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link; the first backhaul data is sent by the base station to the MBSFN subframe of the first multimedia broadcast single frequency network. An intermediate node, where the location of the first MBSFN subframe is related to one or more downlink MBSFN subframes of the backhaul link of the relay node The same location;

And a receiver, configured to receive the first backhaul data sent by the intermediate node in the first subframe. With reference to the ninth aspect, in a first possible implementation, the receiver is further configured to receive, by the base station, the relay node that is sent by the base station in one or more downlink MBSFN subframes of the backhaul link Second return data. With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a second possible implementation, the receiver is further configured to receive a buffer report message sent by the intermediate node, where the cache report is The message is configured to enable the relay node to send the first scheduling indication message to the intermediate node. With reference to the ninth aspect, the first possible implementation manner of the ninth aspect, and the second possible implementation manner, in a third possible implementation, the transmitter is specifically used to pass the medium The physical downlink control channel PDCCH of the node sends a first scheduling indication message to the intermediate node. With reference to the ninth aspect, the first possible implementation manner of the ninth aspect, and the third possible implementation manner, in the fourth possible implementation manner, the intermediate node includes: a user with a relay function Device UE, or a relay with a UE module. A tenth aspect, a system for transmitting backhaul data, comprising: any one of the intermediate nodes provided in the foregoing fourth and fifth aspects, and/or any one of the foregoing six or seven aspects, and/or Any of the relay nodes provided in the eighth and ninth aspects above. The method, device, and system for transmitting backhaul data provided by the embodiment of the present invention, where the intermediate node is in the first MBSFN subframe receiving base station that is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node Following the backhaul data of the node, and according to the first scheduling indication message sent by the relay node, the backhaul data is sent to the relay node in the first subframe with the same location of the uplink transmission subframe of the access link. This program By adding an intermediate node in the system, the uplink transmission sub-frame transmission (downlink) backhaul data on the access link is realized, that is, the backhaul chain at the relay node can be implemented by using the scheme on the basis of the prior art. The downlink MBSFN subframe of the path and the uplink transmission subframe of the access link transmit (downstream) backhaul data, thereby improving the backhaul capacity and improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a schematic diagram of a system architecture in the prior art;

2 is a schematic structural diagram of a wireless relay relay in the prior art; FIG. 3 is a schematic diagram of a system architecture according to an embodiment of the present invention; FIG. 4 is a schematic diagram of transmitting backhaul data according to Embodiment 1 of the present invention; Schematic diagram of the process;

5 is a schematic flowchart of a method for transmitting backhaul data according to Embodiment 2 of the present invention;

6 is a schematic flowchart of a method for transmitting backhaul data according to Embodiment 3 of the present invention;

FIG. 7 is a schematic flowchart of a method for transmitting backhaul data according to Embodiment 4 of the present invention; FIG.

FIG. 8 is a schematic diagram of a scenario in which a base station uses each channel according to Embodiment 4 of the present invention; FIG. 9 is a schematic structural diagram of an intermediate node according to Embodiment 5 of the present invention; FIG. 10 is a schematic structural diagram of another intermediate node according to Embodiment 5 of the present invention; FIG. 12 is a schematic structural diagram of a base station according to Embodiment 7 of the present invention; FIG. 13 is a schematic structural diagram of a base station according to Embodiment 8 of the present invention; A schematic diagram of a structure of a relay node; FIG. 15 is a schematic structural diagram of a relay node according to Embodiment 10 of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying 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 the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention. The system architecture of the technology provided by the embodiment of the present invention, as shown in FIG. 3, includes: a base station, a relay node, an intermediate node, and UEs (macro UE and R-UE). The link between the intermediate node and the base station is referred to as a first auxiliary link, and the link between the intermediate node and the relay node is referred to as a second auxiliary link. The "relay node" may be the above-mentioned wireless relay relay, generally an in-band relay. The "intermediate node" is a technology provided by the present invention. In order to improve the backhaul capacity, an intermediate device added in the backhaul link is used for the backhaul data sent by the base station for the relay node in the designated downlink MBSFN subframe buffer of the backhaul link. And transmitting the backhaul data to the relay node in an uplink transmission subframe of the access link. Optionally, the "intermediate node" may be a UE with a relay function, or may be a relay with a UE module; it supports dual connectivity, that is, can be connected to two different network nodes at the same time. It should be noted that, in the technical solution provided herein, since the MBSFN subframe is used for backhaul transmission, the "downlink transmission subframe of the backhaul link" may be referred to as "downlink MBSFN subframe of the backhaul link". The terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist separately. B these three situations. In addition, the character "/" in this article means that the contextual object is an "or" relationship.

Embodiment 1 This embodiment describes a method for transmitting backhaul data provided by an embodiment of the present invention from the perspective of an intermediate node side. As shown in FIG. 4, the method includes:

401: The intermediate node receives the backhaul data of the relay node sent by the base station in the MBSFN subframe of the first multimedia broadcast single frequency network, where the location of the first MBSFN subframe is one of the backhaul link of the relay node or The locations of multiple downlink MBSFN subframes are the same. Illustratively, the "backhaul data of the relay node" in the embodiment of the present invention may be part of the backhaul data sent by the base station for the relay node, and may specifically be a part of the base station that is sent by the relay node and has a low requirement for delay. Return data.

The "position of the MBSFN subframe" refers to the position of the MBSFN subframe in the radio frame. "The location of the first MBSFN subframe is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node", for example, in a TDD system, the base station uses #4 and #9 in one radio frame as The downlink MBSFN subframe of the backhaul link of the relay node, therefore, the first MBSFN subframe may be #4 and/or #9 in one radio frame. For example, in the FDD (Frequency Division Duplexing) system, on the downlink, the base station uses #2, #3, and #6 in a certain radio frame as a backhaul of the relay node. The downlink MBSFN subframe of the link, therefore, the first MBSFN subframe may be #2 and/or #3 and/or #6 in one radio frame. In an embodiment of the present invention, before the step 401, the method may further include: a process in which the base station configures the first MBSFN subframe for the intermediate node, where the method may be implemented by: receiving the MBSFN subframe configuration message sent by the base station And the MBSFN subframe configuration message includes a location of the first MBSFN subframe; and configuring the first MBSFN subframe according to the MBSFN subframe configuration message. Optionally, before the step 401, the method may further include: receiving, in the first MBSFN subframe, a second scheduling indication message that is sent by the base station by using a physical downlink control channel PDCCH of the base station, where the second scheduling The indication message is used to indicate that the intermediate node receives the backhaul data through the physical downlink shared channel (PDSCH) of the base station. In this case, the step 401 may specifically include: the intermediate node is in the first multiple according to the second scheduling indication message. The media broadcast single frequency network MBSFN subframe receives the backhaul data sent by the base station through the PDSCH of the base station.

402: Receive a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate an uplink resource of an access link of the relay node used by the backhaul data. Exemplarily, the step 402 is specifically implemented as: receiving, by using a PDCCH of the relay node, a first scheduling indication message sent by the relay node. In an embodiment of the present invention, before step 402, the method may further include: sending a buffer report message to the relay node, where the cache report message is used to send the relay node to the intermediate node The first scheduling indication message. For example, the step may be specifically implemented as: sending, by using the uplink transmission subframe of the access link, the cache report message to the base station.

403: Send, according to the first scheduling indication message, to the relay node in a first subframe. Sending the backhaul data, the location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link. Exemplarily, "the location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link." For example, in a TDD system, a relay node will be in a certain radio frame. #2, #7, #8 are uplink transmission subframes of the access link of the relay node, and are used for transmitting uplink (access) data of the access link of the relay node; correspondingly, the first subframe It can be #2 and / or #7 and / or #8 in a radio frame. For example, in the FDD (Frequency Division Duplexing) system, the base station uses #0, #1, #3, #4, and #5 in a certain radio frame as the access link of the relay node. Uplink transmission subframes; accordingly, the first subframe may be #0 and/or #1 and/or #3 and/or #4 and/or #5 in one radio frame. Optionally, the access link and the backhaul link work in a time division multiplexing mode TDM. Optionally, the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link.

In an embodiment of the present invention, before the step 401, the method may further include: a process of establishing a secondary link, where the method may be implemented by: receiving a secondary link setup message sent by the base station; Establishing a message for establishing a first auxiliary link for information interaction between the intermediate node and the base station, and a second auxiliary chain for information interaction between the intermediate node and the relay node And establishing, for the first auxiliary link and the second auxiliary link, according to the auxiliary link setup message. Exemplarily, the auxiliary link setup message may include Radio Resource Control Protocol (RRC) configuration information and the like. In this case, the step 401 specifically includes: the intermediate node receiving the relay sent by the base station in the first multimedia broadcast single frequency network MB SFN subframe based on the first auxiliary link. The backhaul data of the node. Step 402 specifically includes: receiving, according to the second auxiliary link, a first scheduling indication message sent by the relay node. Step 403 specifically includes: transmitting, according to the first secondary link, the backhaul data to the relay node in a first subframe according to the first scheduling indication message.

The MBSFN subframe configuration message and the secondary link setup message may be different messages or may be combined into the same message. It should be noted that, in a specific implementation, the method for transmitting backhaul data provided by the embodiment of the present invention is generally used together with the method for transmitting (downlink) backhaul data in the prior art, thereby improving the downlink backhaul capacity. In the method for transmitting backhaul data provided by the embodiment of the present invention, the intermediate node receives the backhaul of the relay node sent by the base station in the first MBSFN subframe that is the same as the position of one or more downlink MBSFN subframes of the backhaul link of the relay node. Data, and according to the first scheduling indication message sent by the relay node, the backhaul data is sent to the relay node in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme implements uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the relay node based on the prior art. The downlink MBSFN subframe of the backhaul link and the uplink transmission subframe of the access link transmit (downstream) backhaul data, thereby improving the backhaul capacity and improving system performance.

Embodiment 2 This embodiment describes a method for transmitting backhaul data provided by an embodiment of the present invention from the perspective of a base station side. As shown in FIG. 5, the method includes:

501: The base station determines the first backhaul data of the relay node sent to the intermediate node. Exemplarily, the "first backhaul data" described in this embodiment may be the "backhaul data" described in steps 101-103 in the first embodiment. Related content in this embodiment The explanations and examples can be referred to the embodiments - as well as the specific embodiments described below. In a specific implementation, before the step 501, the method may further include: performing, by the base station, delay analysis on the backhaul data of the relay node that is sent to the relay node, and determining data that does not require high delay, and setting the delay requirements The non-high data is the first backhaul data of the relay node forwarded through the intermediate node, and the first backhaul data is sent to the intermediate node. The specific analysis method of the embodiment of the present invention and the specific determination condition of “the requirement for the delay is not high” are not limited. Certainly, the first backhaul data of the relay node sent to the intermediate node may be determined by other standards, which is not limited by the embodiment of the present invention.

502: Send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, where a location of the first MBSFN subframe is one of a backhaul link of the relay node or The location of the multiple downlink MBSFN subframes is the same; the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; The relay node sends the intermediate node to the intermediate node, and is used to indicate an uplink resource of the access link of the relay node used by the first backhaul data; the location of the first subframe and the connection The location of one or more uplink transmission subframes of the ingress link is the same. Exemplarily, the step 502 is specifically implemented as: transmitting, by the physical downlink shared channel PDSCH of the base station, the first backhaul data to the intermediate node in the MBSFN subframe of the first multimedia broadcast single frequency network. In an embodiment of the present invention, before the step 502, the method may further include: sending an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe, The MBSFN subframe configuration message is used to enable the intermediate node to configure the first MBSFN subframe. Exemplarily, the base station may send an MBSFN subframe configuration message to the intermediate node if the load of the backhaul link of the relay node is greater than or equal to a preset threshold. Of course, the MBSFN subframe configuration message may also be sent to the intermediate node under other trigger conditions.

Optionally, the resource used by the base station to send the first backhaul data is the same as the resource used when the base station sends the downlink data to the user equipment served by the base station, where the base station sends the first The resources used in the backhaul data include the PDSCH of the base station and the first MBSFN subframe. Exemplarily, the user equipment served by the base station refers to the user equipment covered by the base station, that is, the macro UE described above. In addition, the "resources" here generally refer to time-frequency resources. Optionally, the method may further include: sending, by using the physical downlink control channel PDCCH of the base station, a second scheduling indication message to the intermediate node in the first MBSFN subframe; the second scheduling indication message is used to indicate The intermediate node receives the first backhaul data on a physical downlink shared channel PDSCH of the base station. In an embodiment of the present invention, before the step 501, the method may further include the process of establishing a secondary link, which may be implemented by: sending a secondary link setup message to the intermediate node; And the node establishes, according to the auxiliary link setup message, a first auxiliary link for performing information interaction between the intermediate node and the base station, and performs information interaction between the intermediate node and the relay node. The second auxiliary link. The auxiliary link setup message may include wireless resource control protocol RRC configuration information and the like. Exemplarily, in this case, the step 502 specifically includes: sending, according to the second auxiliary link, the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe.

It should be noted that, in a specific implementation, the method for transmitting backhaul data provided by the embodiment of the present invention is generally used together with a method for directly transmitting (downlink) backhaul data by a base station to a relay node in the prior art, thereby improving downlink backhaul capacity. In this case, the method may further include: the base station determining the second of the relay node sent to the relay node Backhaul data; transmitting the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

Optionally, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

Optionally, the access link and the backhaul link work in a time division multiplexing mode TDM.

Optionally, the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link. In the method for transmitting backhaul data provided by the embodiment of the present invention, the base station sends the first relay node to the intermediate node in the first MBSFN subframe that is the same as the position of one or more downlink MBSFN subframes of the backhaul link of the relay node. The backhaul data is sent to the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the backhaul link by using the scheme on the basis of the prior art. The downlink MBSFN subframe and the uplink transmission subframe of the access link transmit (downlink) backhaul data, thereby improving the backhaul capacity, thereby improving system performance.

Embodiment 3

The method for transmitting backhaul data provided by the embodiment of the present invention is described in the embodiment from the perspective of the relay node side. As shown in FIG. 6, the method includes:

601: The relay node sends a first scheduling indication message to the intermediate node, where the first scheduling indication message is used to indicate an uplink resource of the access link of the relay node used when transmitting the first backhaul data of the relay node. And configured to enable the intermediate node to send the first backhaul to the relay node according to the first scheduling indication message in the first subframe. The location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link; the first backhaul data is used by the base station in the first multimedia broadcast single frequency network MBSFN The frame is sent to the intermediate node, and the location of the first MBSFN subframe is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node.

Exemplarily, the "first backhaul data" described in the embodiment may be "backhaul data" described in steps 101 - 103 in the first embodiment; "first backhaul data" described in the second embodiment. For the interpretation and examples of the related content in this embodiment, reference may be made to the first embodiment and the following specific embodiments.

Optionally, the step 601 may include: the relay node sends a first scheduling indication message to the intermediate node by using a physical downlink control channel PDCCH of the relay node. In an embodiment of the present invention, before the step 601, the method may further include: receiving a cache report message sent by the intermediate node, where the cache report message is used to send the relay node to the intermediate node The first scheduling indication message.

602: Receive the first backhaul data sent by the intermediate node in the first subframe. Optionally, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module. Optionally, the access link and the backhaul link work in a time division multiplexing mode TDM.

Optionally, the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link.

It should be noted that, in a specific implementation, the method for transmitting backhaul data provided by the embodiment of the present invention is generally used together with a method for directly transmitting (downlink) backhaul data by a base station to a relay node in the prior art, thereby improving downlink backhaul capacity. In this case, the method The method may further include: receiving, in one or more downlink MBSFN subframes of the backhaul link, second backhaul data of the relay node sent by the base station. The method for transmitting backhaul data provided by the embodiment of the present invention, the relay node sends a first scheduling indication message to the intermediate node, so that the intermediate node has the same first position of one or more uplink transmission subframes of the access link. The frame sends the first backhaul data of the relay node to the relay node according to the first scheduling indication message; wherein the first backhaul data is the same as the location of the one or more downlink MBSFN subframes of the backhaul link of the relay node by the base station The first MBSFN subframe is sent to the intermediate node. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the backhaul link by using the scheme on the basis of the prior art. The downlink MBSFN subframe and the uplink transmission subframe of the access link transmit (downlink) backhaul data, thereby improving the backhaul capacity, thereby improving system performance.

Embodiment 4 "U-PDCCH" and "R-PDCCH" in this embodiment are both PDCCHs of a base station, where "U-PDCCH" represents a PDCCH used by a base station to schedule a macro UE, and "R-PDCCH" represents a base station scheduling. The PDCCH used in the relay node; "U-PDSCH" and "R-PDSCH" both indicate the PDSCH of the base station, where "U-PDSCH" represents the PDSCH used by the base station to schedule the macro UE, and "R-PDSCH" represents the base station scheduling. The PDSCH used when relaying a node.

In addition, the "first backhaul data" described in this embodiment represents the backhaul data that the base station forwards to the relay node through the intermediate node, and may specifically be the "backhaul data" described in steps 101-103 in the first embodiment, and the second embodiment. And the "first backhaul data" described in the third embodiment; the "second backhaul data" described in this embodiment represents the backhaul data that the base station sends directly to the relay node, which may be specifically described in the second embodiment and the third embodiment. "Second Return Data". As shown in FIG. 7, the method for transmitting backhaul data provided by this embodiment includes:

701: The base station determines whether the load of the backhaul link of the relay node is greater than or equal to a preset threshold. If yes, go to step 702; if no, go to step 712. Exemplarily, the technical indicators used in the “base station determining whether the load of the backhaul link of the relay node is greater than or equal to the preset threshold”, the manner of obtaining the technical indicator, and the value of the preset threshold are not performed in this embodiment. The definition can be implemented using methods and experience in the prior art. If the determination result in step 701 is "Yes", it means: the load of the backhaul link of the relay node is too large, and the base station is the (downstream) backhaul data transmitted by the relay node (may include the first backhaul data and the second backhaul data) ) is too big. This situation is likely to cause a problem that the backhaul capacity is limited. Therefore, in order to reduce or avoid the probability that the backhaul capacity is limited, the method (steps 702-710) and the prior art (steps 71 1-7) provided by the embodiments of the present invention may be combined. 12) The method (downstream) transmits the backhaul data. If the result of the determination in the step 701 is "NO", it means that the relay node has less load on the backhaul link. Generally, in this case, the (downstream) backhaul data transmitted by the base station for the relay node is within the range of the backhaul capacity, and does not cause a problem that the backhaul capacity is limited. Therefore, the prior art can be used (steps 71 1 - 712 ) The method of transmitting backhaul data is to transmit (downstream) backhaul data.

702: The base station sends a secondary link setup message to the intermediate node. Exemplarily, the auxiliary link setup message includes RRC configuration information required to establish the first secondary link and the second secondary link in step 703.

703: The intermediate node establishes, according to the auxiliary link setup message, a first auxiliary link for performing information interaction between the intermediate node and the base station, and a second auxiliary link for performing information interaction between the intermediate node and the relay node. It should be noted that, in order to clearly and succinctly describe the present embodiment, the "first auxiliary link" and the "second auxiliary link" are not mentioned in the following steps, but in the following steps, the intermediate node and The information exchange process of the base station is based on the first auxiliary link, and the information interaction process between the intermediate node and the relay node is based on the second auxiliary link.

704: The base station sends an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe, and a location of the first MBSFN subframe and one or more downlink MBSFNs of the backhaul link of the relay node. The positions of the frames are the same. Exemplarily, the MBSFN subframe configuration message may further include RRC configuration information required for the intermediate node to communicate with the base station, the intermediate node, and the relay node.

705: The intermediate node configures the first MBSFN subframe according to the subframe configuration message. Specifically, the intermediate node uses the location of the MBSFN subframe in the MBSFN subframe configuration message as the location of receiving the first backhaul data, and listens to the U-PDCCH of the base station at the corresponding moment. Optionally, the "auxiliary link setup message" in step 702 and the "MBSFN subframe configuration message" in step 704 can be combined into one message transmission. In this case, step 702 and step 704 can be performed simultaneously, step 703 and The execution sequence of the step 705 may be: executing at the same time, or performing step 703 and then performing step 705, or performing step 705 and then performing step 703.

706: The base station sends a second scheduling indication message to the intermediate node by using the U-PDCCH in the first MBSFN subframe, where the second scheduling indication message is used to indicate that the intermediate node receives the first backhaul data on the U-PDSCH. Exemplarily, the second scheduling indication message includes information about the location of the resource block used by the base station for receiving the backhaul data on the U-PDSCH and the modulation and coding scheme used.

707: The base station sends the first MBSFN subframe to the intermediate node through the U-PDSCH. First return data. Correspondingly, the intermediate node receives the first backhaul data through the U-PDSCH according to the second scheduling message.

708: The intermediate node stores the first backhaul data.

709: The intermediate node sends a buffer report message to the relay node, and the cache report message is used for requesting resources used when scheduling the backhaul data.

Illustratively, the "cache report message" may contain the size of the buffer space occupied by the backhaul data (i.e., the first backhaul data) to be scheduled, the number of channels (groups) used, and the like. The "cache report message" can be a newly defined message; in the LTE system, the "cache report message" can also be a BSR (Buffer Status Report) message in the prior art.

710: The relay node sends a first scheduling indication message to the intermediate node by using a PDCCH of the relay node according to the buffer report message, where the first scheduling indication message includes a resource used for scheduling the backhaul data. Exemplarily, the "first scheduling indication message" may be a newly defined message; in the LTE system, when the "cache report message" in step 709 is a BSR message, the "first scheduling indication message" in the step 710 "Specifically a UL grant (Uplink grant) message. It should be noted that when the "first scheduling indication message" is a UL grant, the subframe in which the relay node sends the UL grant to the intermediate node is the same as the subframe in which the relay node sends the UL grant to the R-UE under its coverage. Optionally, steps 709-710 may be replaced by the following steps: The relay node directly sends a first scheduling indication message to the intermediate node. In this case, the intermediate node may listen to the PDCCH of the relay node in any subframe to obtain a first scheduling indication message.

71: The intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message, where the location of the first subframe is the same as the location of the uplink transmission subframe of the access node of the relay node. Exemplarily, when the "first scheduling indication message" in step 710 is a UL grant, the "first subframe" in the step 71 1 is specifically: the fourth subframe after the intermediate node receives the UL grant. When the "first scheduling indication message" in step 710 is a newly defined message, the "first subframe" in the step 71 1 is specifically: one or more capable of satisfying the access link with the relay node The subframes in which the uplink transmission subframes are located at the same position.

712: The base station sends a third scheduling indication message to the relay node by using the R-PDCCH in the downlink MBSFN subframe of the backhaul link of the relay node, where the third scheduling indication message includes indicating that the relay node sends the base station to send on the R-PDSCH. Information about the second backhaul data.

713: The base station sends the second backhaul data to the relay node by using the R-PDSCH in the downlink MBSFN subframe of the backhaul link of the relay node. After step 713 is performed, it ends. As shown in FIG. 8, a schematic diagram of a scenario in which each channel is used by a base station in the method, wherein the horizontal axis represents time and the vertical axis represents frequency. The method for transmitting backhaul data provided by the embodiment of the present invention, when the load of the backhaul link of the relay node is less than a preset threshold, the downlink MBSFN subframe of the backhaul link of the relay node is directly transmitted to the relay node through the R-PDSCH. Transmitting the second backhaul data; when the load of the backhaul link of the relay node is greater than or equal to the preset threshold, the base station is in the same first MBSFN subframe to the intermediate node as the downlink MBSFN subframe of the backhaul link of the relay node Sending the first backhaul data, so that the intermediate node sends the first backhaul data to the relay node in the first subframe with the same position of the uplink transmission subframe of the access link; and is in the downlink of the backhaul link of the relay node The MBSFN subframe directly transmits the second backhaul data to the relay node through the R-PDSCH. In the case that the load of the backhaul link of the relay node is greater than or equal to the preset threshold, the uplink transmission subframe on the access link and the backhaul chain in the relay node are implemented by adding the intermediate node in the system. Down the road MBSFN sub-frame transmission (downstream) backhaul data, which improves backhaul capacity and improves system performance.

Embodiment 5

As shown in FIG. 9, an intermediate node 9 is provided for performing the method for transmitting backhaul data shown in FIG. 4, where the intermediate node 9 includes:

The first receiving unit 91 is configured to receive backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, where the location of the first MBSFN subframe and the backhaul chain of the relay node One or more downstream MBSFN subframes have the same location;

The second receiving unit 92 is configured to receive a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate an uplink of the access link of the relay node used by the backhaul data. Resource

The sending unit 93 is configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, where the location of the first subframe is one or more of the access link The positions of the uplink transmission subframes are the same.

Optionally, the first receiving unit 91 is further configured to: receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe;

As shown in FIG. 10, the intermediate node 9 further includes: a configuration unit 94, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message.

Optionally, the first receiving unit 91 is further configured to: receive, in the first MBSFN subframe, a second scheduling indication message that is sent by the base station by using a physical downlink control channel PDCCH of the base station, where the second scheduling The indication message is used to indicate that the intermediate node 9 receives the backhaul data through the physical downlink shared channel PDSCH of the base station; the first receiving unit 91 is specifically configured to: according to the second scheduling indication message, be the first The media broadcast single frequency network MBSFN subframe passes through the PDSCH connection of the base station Receiving backhaul data of the relay node sent by the base station.

Optionally, the first receiving unit 91 is further configured to receive a secondary link setup message sent by the base station, where the auxiliary link setup message is used to establish an intermediate link between the intermediate node 9 and the base station. a first auxiliary link for performing information interaction, and a second auxiliary link for performing information interaction between the intermediate node 9 and the relay node;

As shown in FIG. 10, the intermediate node 9 further includes: an establishing unit 95, configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link setup message.

Optionally, the second receiving unit 92 is specifically configured to receive, by using a PDCCH of the relay node, a first scheduling indication message sent by the relay node.

Optionally, the sending unit 93 is further configured to: send a buffer report message to the relay node, where the cache report message is used to enable the relay node to send the first scheduling indication to the intermediate node Message.

Optionally, the intermediate node 9 includes: a user equipment UE with a relay function, or a relay with a UE module. The intermediate node provided by the embodiment of the present invention receives the backhaul data of the relay node sent by the base station in the first MBSFN subframe that is the same as the location of the one or more downlink MBSFN subframes of the backhaul link of the relay node, and according to the middle Following the first scheduling indication message sent by the node, the backhaul data is sent to the relay node in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme implements uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the relay node based on the prior art. The downlink MBSFN subframe of the backhaul link and the uplink transmission subframe transmission (downlink) backhaul data of the access link, This improves backhaul capacity and improves system performance. Embodiment 6

As shown in FIG. 11, an intermediate node 9 is provided for performing the method for transmitting backhaul data shown in FIG. 4, where the intermediate node 9 includes:

The receiver 11A is configured to receive backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, where the location of the first MBSFN subframe and the backhaul link of the relay node One or more downlink MBSFN subframes are in the same location; and receiving a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate that the relay node used to transmit the backhaul data is connected Uplink resources into the link;

The transmitter 11B is configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, where the location of the first subframe is one or more of the access link The positions of the uplink transmission subframes are the same.

Optionally, the receiver 11A is further configured to receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe;

The intermediate node further includes: a processor 11C, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message.

Optionally, the receiver 11A is further configured to: receive, in the first MBSFN subframe, a second scheduling indication message that is sent by the base station by using a physical downlink control channel PDCCH of the base station, where the second scheduling indication message is Instructing the intermediate node to receive the backhaul data by using a physical downlink shared channel (PDSCH) of the base station;

The receiver 11A is specifically configured to: according to the second scheduling indication message, receive backhaul data of the relay node sent by the base station by using a PDSCH of the base station in a MBSFN subframe of the first multimedia broadcast single frequency network.

Optionally, the receiver 11A is further configured to receive an auxiliary chain sent by the base station. a route establishment message; the auxiliary link setup message is used to establish a first auxiliary link for information interaction between the intermediate node and the base station, and for the intermediate node and the relay node a second auxiliary link for information interaction;

The intermediate node further includes: a processor 1 1 C, configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link establishment message.

Optionally, the receiver 1 1A is specifically configured to receive, by using a PDCCH of the relay node, a first scheduling indication message sent by the relay node.

Optionally, the transmitter 1 1 B is further configured to: send a buffer report message to the relay node, where the cache report message is used to enable the relay node to send the first schedule to the intermediate node. Indicate the message.

Optionally, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module. The intermediate node provided by the embodiment of the present invention receives the backhaul data of the relay node sent by the base station in the first MBSFN subframe that is the same as the location of the one or more downlink MBSFN subframes of the backhaul link of the relay node, and according to the middle Following the first scheduling indication message sent by the node, the backhaul data is sent to the relay node in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme implements uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the relay node based on the prior art. The downlink MBSFN subframe of the backhaul link and the uplink transmission subframe of the access link transmit (downstream) backhaul data, thereby improving the backhaul capacity and improving system performance. Example 7 As shown in FIG. 12, a base station 12 is provided for performing the method for transmitting backhaul data shown in FIG. 5, where the base station 12 includes:

a determining unit 12A, configured to determine first backhaul data of the relay node sent to the intermediate node;

The sending unit 12B is configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, where the location of the first MBSFN subframe and the backhaul chain of the relay node The location of the one or more downlink MBSFN subframes of the path is the same; the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; The indication message is sent by the relay node to the intermediate node, and is used to indicate an uplink resource of an access link of the relay node used by the first backhaul data; a location of the first subframe The same location as one or more uplink transmission subframes of the access link.

Optionally, the determining unit 12A is further configured to: determine second backhaul data of the relay node that is sent to the relay node;

The sending unit 12B is further configured to send the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

Optionally, the sending unit 12B is further configured to: send an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe, and the MBSFN subframe configuration message And configured to enable the intermediate node to configure the first MBSFN subframe.

Optionally, the sending unit 12B is specifically configured to: when the load of the backhaul link is greater than or equal to a preset threshold, send an MBSFN subframe configuration message to the intermediate node.

Optionally, the sending unit 12B is further configured to: send, by using the physical downlink control channel PDCCH of the base station 12, a second scheduling indication message to the intermediate node in the first MBSFN subframe; The message is used to indicate that the intermediate node receives the first backhaul on the physical downlink shared channel PDSCH of the base station 12 According to.

Optionally, the sending unit 12B is further configured to: send a secondary link setup message to the intermediate node, to enable the intermediate node to establish, according to the secondary link setup message, the intermediate node and the base station. A first auxiliary link for information interaction between 12, and a second auxiliary link for information exchange between the intermediate node and the relay node.

Optionally, the sending unit 12B is specifically configured to send the first backhaul data to the intermediate node by using a physical downlink shared channel PDSCH of the base station 12 in a MBSFN subframe of the first multimedia broadcast single frequency network.

Optionally, the resource used by the sending unit 12B to send the first backhaul data is the same as the resource used by the base station 12 to send downlink data to the user equipment served by the base station 12, where the sending unit 12B The resource used when transmitting the first backhaul data includes: a PDSCH of the base station 12 and the first MBSFN subframe. Optionally, the intermediate node comprises: a user equipment UE with a relay function, or a relay with a UE module. The base station provided by the embodiment of the present invention sends the first backhaul data of the relay node to the intermediate node in the first MBSFN subframe that is the same as the position of the one or more downlink MBSFN subframes of the backhaul link of the relay node, so that the base station The intermediate node sends the first backhaul data to the relay node according to the first scheduling indication message in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the backhaul link by using the scheme on the basis of the prior art. Uplink MBSFN subframes and uplink transmission subframes of the access link transmit (downstream) backhaul data, thereby improving backhaul capacity and improving system performance. Example eight

As shown in FIG. 13, a base station 12 is provided for performing according to an embodiment of the present invention. The method for transmitting backhaul data shown in FIG. 5, the base station 12 includes:

The processor 13A is configured to determine a first backhaul data of the relay node sent to the intermediate node;

The transmitter 13B is configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, where the location of the first MBSFN subframe and the backhaul chain of the relay node The location of the one or more downlink MBSFN subframes of the path is the same; the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; The indication message is sent by the relay node to the intermediate node, and is used to indicate an uplink resource of an access link of the relay node used by the first backhaul data; a location of the first subframe The same location as one or more uplink transmission subframes of the access link.

Optionally, the processor 13A is further configured to: determine second backhaul data of the relay node that is sent to the relay node;

The transmitter 13B is further configured to send the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

Optionally, the transmitter 13B is further configured to: send an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes a location of the first MBSFN subframe, and the MBSFN subframe configuration message And configured to enable the intermediate node to configure the first MBSFN subframe.

Optionally, the transmitter 13B is specifically configured to: when the load of the backhaul link is greater than or equal to a preset threshold, send an MBSFN subframe configuration message to the intermediate node.

Optionally, the transmitter 13B is further configured to: send, by using the physical downlink control channel PDCCH of the base station, a second scheduling indication message to the intermediate node in the first MBSFN subframe; the second scheduling indication message. And configured to instruct the intermediate node to receive the first backhaul data on a physical downlink shared channel PDSCH of the base station.

Optionally, the transmitter 13B is further configured to send an auxiliary chain to the intermediate node. Establishing a message to enable the intermediate node to establish a first auxiliary link for information interaction between the intermediate node and the base station according to the auxiliary link setup message, and for the intermediate node and the A second auxiliary link that performs information interaction between the relay nodes.

Optionally, the transmitter 13B is specifically configured to send the first backhaul data to the intermediate node by using a physical downlink shared channel PDSCH of the base station in a first multimedia broadcast single frequency network MBSFN subframe.

Optionally, the resource used by the transmitter 13B to send the first backhaul data is the same as the resource used when the base station sends the downlink data to the user equipment served by the base station, where the sender 13B sends the The resources used in the first backhaul data include: a PDSCH of the base station, and the first MBSFN subframe. Optionally, the intermediate node comprises: a user equipment UE with a relay function, or a relay with a UE module. The base station provided by the embodiment of the present invention sends the first backhaul data of the relay node to the intermediate node in the first MBSFN subframe that is the same as the position of the one or more downlink MBSFN subframes of the backhaul link of the relay node, so that the base station The intermediate node sends the first backhaul data to the relay node according to the first scheduling indication message in the first subframe with the same location of the uplink transmission subframe of the access link. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the backhaul link by using the scheme on the basis of the prior art. Uplink MBSFN subframes and uplink transmission subframes of the access link transmit (downstream) backhaul data, thereby improving backhaul capacity and improving system performance. Example nine

As shown in FIG. 14, a relay node 14 is provided for performing the method for transmitting backhaul data shown in FIG. 6 according to an embodiment of the present invention. The relay node 14 includes:

The sending unit 14A is configured to send a first scheduling indication message to the intermediate node, where The first scheduling indication message is used to indicate an uplink resource of the access link of the relay node 14 used when transmitting the first backhaul data of the relay node 14, and is used to cause the intermediate node to be in the first subframe according to the Transmitting, by the first scheduling indication message, the first backhaul data to the relay node 14; the location of the first subframe is the same as the location of one or more uplink transmission subframes of the access link; The first backhaul data is sent by the base station to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, and the location of the first MBSFN subframe and one of the backhaul links of the relay node 14 The positions of multiple downlink MBSFN subframes are the same;

The receiving unit 14B is configured to receive the first backhaul data that is sent by the intermediate node in the first subframe.

Optionally, the receiving unit 14B is further configured to receive the second backhaul data of the relay node 14 sent by the base station in one or more downlink MBSFN subframes of the backhaul link.

Optionally, the receiving unit 14B is further configured to: receive a buffer report message sent by the intermediate node, where the cache report message is used to enable the relay node 14 to send the first scheduling indication to the intermediate node. Message.

Optionally, the sending unit 14A is specifically configured to send, by using the physical downlink control channel PDCCH of the relay node 14, a first scheduling indication message to the intermediate node.

Optionally, the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module. The relay node provided by the embodiment of the present invention sends a first scheduling indication message to the intermediate node, so that the first subframe in which the intermediate node has the same position of one or more uplink transmission subframes of the access link according to the first scheduling The indication message sends the first backhaul data of the relay node to the relay node; wherein the first backhaul data is the first MBSFN of the same location of the one or more downlink MBSFN subframes of the backhaul link of the relay node by the base station The frame is sent to the intermediate node. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, By using the scheme on the basis of the prior art, the downlink MBSFN subframe on the backhaul link and the uplink transmission subframe transmission (downlink) backhaul data of the access link are implemented, thereby improving the backhaul capacity and improving the system performance. Implementation ten

As shown in FIG. 15, a relay node 14 is provided for performing the method for transmitting backhaul data shown in FIG. 6 according to an embodiment of the present invention. The relay node 14 includes:

The transmitter 15A is configured to send, to the intermediate node, a first scheduling indication message, where the first scheduling indication message is used to indicate an uplink of the access link of the relay node used when transmitting the first backhaul data of the relay node. a resource, and configured to enable the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in a first subframe; a location of the first subframe and the access chain One or more uplink transmission subframes of the path are in the same location; the first backhaul data is sent by the base station to the intermediate node in the MBSFN subframe of the first multimedia broadcast single frequency network, where the first MBSFN subframe The location is the same as the location of one or more downlink MBSFN subframes of the backhaul link of the relay node;

The receiver 15B is configured to receive the first backhaul data sent by the intermediate node in the first subframe.

Optionally, the receiver 15B is further configured to receive, according to one or more downlink MBSFN subframes of the backhaul link, second backhaul data of the relay node sent by the base station.

Optionally, the receiver 15B is further configured to: receive a buffer report message sent by the intermediate node, where the cache report message is used to enable the relay node to send the first scheduling indication message to the intermediate node. .

Optionally, the transmitter 15A is specifically configured to send, by using a physical downlink control channel PDCCH of the relay node, a first scheduling indication message to the intermediate node.

Optionally, the intermediate node includes: a user equipment UE with a relay function, or There is a relay of the UE module. The relay node provided by the embodiment of the present invention sends a first scheduling indication message to the intermediate node, so that the first subframe in which the intermediate node has the same position of one or more uplink transmission subframes of the access link according to the first scheduling The indication message sends the first backhaul data of the relay node to the relay node; wherein the first backhaul data is the first MBSFN of the same location of the one or more downlink MBSFN subframes of the backhaul link of the relay node by the base station The frame is sent to the intermediate node. The scheme realizes uplink transmission subframe transmission (downlink) backhaul data on the access link by adding an intermediate node in the system, that is, the scheme can be implemented on the backhaul link by using the scheme on the basis of the prior art. Uplink MBSFN subframes and uplink transmission subframes of the access link transmit (downstream) backhaul data, thereby improving backhaul capacity and improving system performance.

In addition, the embodiment of the present invention further provides a system for transmitting backhaul data, including: any one of the intermediate nodes 9 provided in the foregoing fifth and sixth embodiments, and/or any one of the base stations 12 provided in the seventh and eighth embodiments, and / or any of the relay nodes 14 provided in Embodiments IX and X.

A person skilled in the art can clearly understand that the specific working process of the system, the device and the unit described above can be referred to the corresponding process in the foregoing method embodiments for the convenience and brevity of the description, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a hardware plus software functional unit.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional units are stored in a storage medium and include a number of steps for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods of the various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), a disk or an optical disk, and the like, which can store program codes. .

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

claims

1. A method for transmitting backhaul data, characterized by including:

The intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, and the position of the first MBSFN subframe is consistent with one or more of the backhaul links of the relay node. The positions of downlink MBSFN subframes are the same;

Receive a first scheduling indication message sent by the relay node, the first scheduling indication message being used to indicate the uplink resources of the access link of the relay node used to transmit the backhaul data;

The backhaul data is sent to the relay node in a first subframe according to the first scheduling indication message, and the position of the first subframe is consistent with the position of one or more uplink transmission subframes of the access link. Same location.

2. The method according to claim 1, characterized in that, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first MBSFN subframe, the method further includes:

Receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes the position of the first MBSFN subframe;

The first MBSFN subframe is configured according to the MBSFN subframe configuration message.

3. The method according to claim 1, characterized in that, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network M B S F N subframe, the method further includes: :

The second scheduling indication message sent by the base station through the physical downlink control channel PDCCH of the base station is received in the first MBSFN subframe, and the second scheduling indication message is used to instruct the intermediate node to pass the physical downlink control channel of the base station. The downlink shared channel PDSCH receives the backhaul data;

The intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MB SF N subframe, including:

The intermediate node, according to the second scheduling indication message, performs the first multimedia broadcast single frequency network The network receives the backhaul data of the relay node sent by the base station through the PDSCH of the base station in the MBSFN subframe.

4. The method according to claim 1, characterized in that, before the intermediate node receives the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network M B S F N subframe, the method further includes :

Receive an auxiliary link establishment message sent by the base station; the auxiliary link establishment message is used to establish a first auxiliary link for information exchange between the intermediate node and the base station, and for the intermediate node A second auxiliary link for information exchange between the node and the relay node;

The first auxiliary link and the second auxiliary link are established according to the auxiliary link establishment message.

5. The method according to any one of claims 1 to 4, characterized in that the receiving the first scheduling indication message sent by the relay node includes:

The first scheduling indication message sent by the relay node is received through the PDCCH of the relay node.

6. The method according to any one of claims 1 to 5, characterized in that, before receiving the first scheduling indication message sent by the relay node, the method further includes: sending a cache to the relay node report message, the cache report message is used to cause the relay node to send the first scheduling indication message to the intermediate node.

7. The method according to any one of claims 1 to 6, characterized in that the access link and the backhaul link operate through time division multiplexing mode TDM.

8. The method according to any one of claims 1 to 7, characterized in that the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link.

9. The method according to any one of claims 1 to 8, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

10. A method for transmitting backhaul data, characterized in that it includes: the base station determines the first backhaul data of the relay node to be sent to the intermediate node;

The first backhaul data is sent to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, and the position of the first MBSFN subframe is consistent with one or more backhaul links of the relay node. The positions of the downlink MBSFN subframes are the same; so that the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; the first scheduling indication message is sent by the intermediate node The relay node sends to the intermediate node to indicate the uplink resource of the access link of the relay node used to transmit the first backhaul data; the position of the first subframe and the access link The position of one or more uplink transmission subframes of the path is the same.

11. The method according to claim 10, characterized in that the method further includes:

Determine the second backhaul data of the relay node to be sent to the relay node; send the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

12. The method according to claim 10 or 11, characterized in that, before the first multimedia broadcast single frequency network MBSFN subframe sends the first backhaul data to the intermediate node, the method further include:

Send an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes the location of the first MBSFN subframe, and the MBSFN subframe configuration message is used to enable the intermediate node to configure the first MBSFN subframe.

13. The method according to claim 12, wherein the sending an MBSFN subframe configuration message to the intermediate node includes:

When the load of the backhaul link is greater than or equal to the preset threshold, an MBSFN subframe configuration message is sent to the intermediate node.

14. The method according to claim 10, characterized in that, the method further includes: In the first MBSFN subframe, a second scheduling indication message is sent to the intermediate node through the physical downlink control channel PDCCH of the base station; the second scheduling indication message is used to indicate to the intermediate node the physical The first backhaul data is received on the downlink shared channel PDSCH.

15. The method according to any one of claims 10 to 14, characterized in that, before the first multimedia broadcast single frequency network MBSFN subframe sends the first backhaul data to the intermediate node, the method Also includes:

sending an auxiliary link establishment message to the intermediate node; so that the intermediate node establishes a first auxiliary link for information exchange between the intermediate node and the base station according to the auxiliary link establishment message, and A second auxiliary link used for information exchange between the intermediate node and the relay node.

16. The method according to any one of claims 10 to 15, characterized in that: sending the first backhaul data to the intermediate node in the first multimedia broadcast single frequency network MB SF N subframe includes:

The first backhaul data is sent to the intermediate node through the physical downlink shared channel PDSCH of the base station in the first multimedia broadcast single frequency network MBSFN subframe.

17. The method according to claim 16, wherein the resources used by the base station to send the first backhaul data are the same as the resources used by the base station to send downlink data to the user equipment served by the base station, Wherein, the resources used by the base station when sending the first backhaul data include: the PDSCH of the base station and the first MBSFN subframe. -

18. The method according to any one of claims 10 to 17, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

19. A method for transmitting backhaul data, characterized by including:

The relay node sends a first scheduling indication message to the intermediate node, where the first scheduling indication The message is used to indicate the uplink resources of the access link of the relay node to be used when transmitting the first backhaul data of the relay node, and is used to cause the intermediate node to perform the operation according to the first scheduling indication message in the first subframe. Send the first backhaul data to the relay node; The position of the -th subframe is the same as the position of one or more uplink transmission subframes of the access link; The first backhaul data is sent by the base station The first multimedia broadcast single frequency network MBSFN subframe is sent to the intermediate node, and the position of the first MBSFN subframe is consistent with the position of one or more downlink MBSFN subframes of the backhaul link of the relay node. same;

The first backhaul data sent by the intermediate node in the first subframe is received.

20. The method according to claim 19, characterized in that the method further includes:

The second backhaul data of the relay node sent by the base station is received in one or more downlink MBSFN subframes of the backhaul link.

21. The method according to claim 19 or 20, characterized in that, before the relay node sends the first scheduling indication message to the intermediate node, the method further includes: receiving a cache report message sent by the intermediate node , the cache report message is used to cause the relay node to send the first scheduling indication message to the intermediate node.

22. The method according to any one of claims 19 to 21, characterized in that the relay node sends a first scheduling indication message to the intermediate node, including:

The relay node sends a first scheduling indication message to the intermediate node through the physical downlink control channel PDCCH of the relay node.

23. The method according to any one of claims 19 to 22, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

24. An intermediate node, characterized by: including:

The first receiving unit is configured to receive the backhaul data of the relay node sent by the base station in the first multimedia broadcast single frequency network MBSFN subframe, where the position of the first MBSFN subframe is the same as The position of one or more downlink MBSFN subframes of the backhaul link of the relay node is the same;

The second receiving unit is configured to receive a first scheduling indication message sent by the relay node, where the first scheduling indication message is used to indicate the uplink resources of the access link of the relay node used to transmit the backhaul data. ;

A sending unit configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, where the position of the first subframe is consistent with one or more of the access links. The positions of the uplink transmission subframes are the same.

25. The intermediate node according to claim 24, characterized in that,

The first receiving unit is also configured to receive an MBSFN subframe configuration message sent by the base station, where the MBSFN subframe configuration message includes the position of the first MBSFN subframe;

The intermediate node further includes: a configuration unit, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message.

26. The intermediate node according to claim 24, characterized in that,

The first receiving unit is further configured to receive, in the first MBSFN subframe, a second scheduling indication message sent by the base station through the physical downlink control channel PDCCH of the base station, where the second scheduling indication message is used to indicate The intermediate node receives the backhaul data through the physical downlink shared channel PDSCH of the base station;

The first receiving unit is specifically configured to, according to the second scheduling instruction message, receive the backhaul data of the relay node sent by the base station through the PDSCH of the base station in the first multimedia broadcast single frequency network MBSFN subframe. .

27. The intermediate node according to claim 24, characterized in that,

The first receiving unit is further configured to receive an auxiliary link establishment message sent by the base station; the auxiliary link establishment message is used to establish a first link for information exchange between the intermediate node and the base station. An auxiliary link, and a second auxiliary link used for information exchange between the intermediate node and the relay node; The intermediate node further includes: an establishment unit, configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link establishment message.

28. The intermediate node according to any one of claims 24 to 27, characterized in that the second receiving unit is specifically configured to receive the first scheduling indication message sent by the relay node through the PDCCH of the relay node. .

29. The intermediate node according to any one of claims 24 to 28, characterized in that the sending unit is further configured to send a cache report message to the relay node, and the cache report message is used to cause the The relay node sends the first scheduling indication message to the intermediate node.

30. The intermediate node according to any one of claims 24 to 29, characterized in that the access link and the backhaul link operate through time division multiplexing mode TDM.

3 1. The intermediate node according to any one of claims 24 to 30, characterized in that the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link.

32. The intermediate node according to any one of claims 24 to 31, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

33. An intermediate node, characterized by: including:

A receiver configured to receive backhaul data of the relay node sent by the base station in a first multimedia broadcast single frequency network MBSFN subframe, where the position of the first MBSFN subframe is consistent with one of the backhaul links of the relay node. Or the locations of multiple downlink MBSFN subframes are the same; and receiving a first scheduling indication message sent by a relay node, where the first scheduling indication message is used to indicate the access of the relay node used to transmit the backhaul data. Uplink resources of the link;

A transmitter configured to send the backhaul data to the relay node in a first subframe according to the first scheduling indication message, where the position of the first subframe is consistent with one or more of the access links. The positions of the uplink transmission subframes are the same.

34. The intermediate node according to claim 33, wherein the receiver is further configured to receive an MBSFN subframe configuration message sent by the base station, and the MBSFN subframe configuration message includes the first MBSFN subframe configuration message. frame position;

The intermediate node further includes: a processor, configured to configure the first MBSFN subframe according to the MBSFN subframe configuration message.

35. The intermediate node according to claim 33, characterized in that,

The receiver is further configured to receive, in the first MBSFN subframe, a second scheduling indication message sent by the base station through a physical downlink control channel PDCCH of the base station, where the second scheduling indication message is used to indicate the The intermediate node receives the backhaul data through the physical downlink shared channel PDSCH of the base station;

The receiver is specifically configured to, according to the second scheduling indication message, receive the backhaul data of the relay node sent by the base station through the PDSCH of the base station in the first multimedia broadcast single frequency network MBSFN subframe.

36. The intermediate node according to claim 33, characterized in that,

The receiver is further configured to receive an auxiliary link establishment message sent by the base station; the auxiliary link establishment message is used to establish a first auxiliary link for information exchange between the intermediate node and the base station. path, and a second auxiliary link used for information exchange between the intermediate node and the relay node;

The intermediate node further includes: a processor, configured to establish the first auxiliary link and the second auxiliary link according to the auxiliary link establishment message.

37. The intermediate node according to any one of claims 33 to 36, characterized in that the receiver is specifically configured to receive the first scheduling indication message sent by the relay node through the PDCCH of the relay node.

38. The intermediate node according to any one of claims 33 to 37, characterized in that the transmitter is further configured to send a cache report message to the relay node, and the cache report message is used to cause the The relay node sends the first scheduling indication message to the intermediate node.

39. The intermediate node according to any one of claims 33 to 38, characterized in that the access link and the backhaul link operate through time division multiplexing mode TDM.

40. The intermediate node according to any one of claims 33 to 39, characterized in that the carrier frequency used by the access link is the same as the carrier frequency used by the backhaul link.

41. The intermediate node according to any one of claims 33 to 40, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

42. A base station, characterized by including:

Determining unit, used to determine the first backhaul data of the relay node sent to the intermediate node;

A sending unit, configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe, where the position of the first MBSFN subframe is related to the backhaul link of the relay node The positions of one or more downlink MBSFN subframes are the same; so that the intermediate node sends the first backhaul data to the relay node in the first subframe according to the first scheduling indication message; the first scheduling indication The message is sent by the relay node to the intermediate node and is used to indicate the uplink resource of the access link of the relay node used to transmit the first backhaul data; the position of the first subframe and The position of one or more uplink transmission subframes of the access link is the same.

43. The base station according to claim 42, characterized in that,

The determining unit is also configured to determine the second backhaul data of the relay node sent to the relay node;

The sending unit is also configured to send the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

44. The base station according to claim 42 or 43, characterized in that,

The sending unit is further configured to send an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes the position of the first MBSFN subframe, The MBSFN subframe configuration message is used to enable the intermediate node to configure the first MBSFN subframe.

45. The base station according to claim 44, characterized in that,

The sending unit is specifically configured to send an MBSFN subframe configuration message to the intermediate node when the load of the backhaul link is greater than or equal to a preset threshold.

46. The base station according to claim 42, characterized in that,

The sending unit is also configured to send a second scheduling indication message to the intermediate node through the physical downlink control channel PDCCH of the base station in the first MBSFN subframe; the second scheduling indication message is used to indicate the The intermediate node receives the first backhaul data on the physical downlink shared channel PDSCH of the base station.

47. The base station according to any one of claims 42 to 46, characterized in that the sending unit is further configured to send an auxiliary link establishment message to the intermediate node; so that the intermediate node The link establishment message establishes a first auxiliary link for information exchange between the intermediate node and the base station, and a second auxiliary link for information exchange between the intermediate node and the relay node. road.

48. The base station according to any one of claims 42 to 47, characterized in that the sending unit is specifically configured to pass the physical downlink shared channel of the base station in the first multimedia broadcast single frequency network MBSFN subframe. PDSCH sends the first backhaul data to the intermediate node.

49. The base station according to claim 48, wherein the resources used by the sending unit when sending the first backhaul data are the same as the resources used by the base station when sending downlink data to the user equipment served by the base station. , wherein the resources used by the sending unit when sending the first backhaul data include: the PDSCH of the base station and the first MBSFN subframe. -

50. The base station according to any one of claims 42 to 49, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

51. A base station, characterized by including:

a processor, configured to determine the first backhaul data of the relay node to be sent to the intermediate node; a transmitter, configured to send the first backhaul data to the intermediate node in a first multimedia broadcast single frequency network MBSFN subframe , the position of the first MBSFN subframe is the same as the position of one or more downlink MBSFN subframes of the backhaul link of the relay node; so that the intermediate node schedules the first subframe in the first subframe according to the first scheduling indication message. Send the first backhaul data to the relay node; the first scheduling indication message is sent by the relay node to the intermediate node, used to indicate the medium used to transmit the first backhaul data. Uplink resources of the access link of the relay node; The position of the first subframe is the same as the position of one or more uplink transmission subframes of the access link.

52. The base station according to claim 51, characterized in that,

The processor is also configured to determine the second backhaul data of the relay node sent to the relay node;

The transmitter is further configured to send the second backhaul data to the relay node in one or more downlink MBSFN subframes of the backhaul link.

53. The base station according to claim 51 or 52, characterized in that,

The transmitter is further configured to send an MBSFN subframe configuration message to the intermediate node, where the MBSFN subframe configuration message includes the position of the first MBSFN subframe, and the MBSFN subframe configuration message is used to enable the The intermediate node configures the first MBSFN subframe.

54. The base station according to claim 53, characterized in that,

The transmitter is specifically configured to send an MBSFN subframe configuration message to the intermediate node when the load of the backhaul link is greater than or equal to a preset threshold.

55. The base station according to claim 51, characterized in that,

The transmitter is further configured to send a second scheduling indication message to the intermediate node through the physical downlink control channel PDCCH of the base station in the first MBSFN subframe; the second scheduling indication message is used to indicate the Intermediate nodes in the physical downlink of the base station The first backhaul data is received on the shared channel PDSCH.

56. The base station according to any one of claims 51 to 55, characterized in that the transmitter is further configured to send an auxiliary link establishment message to the intermediate node; so that the intermediate node The link establishment message establishes a first auxiliary link for information exchange between the intermediate node and the base station, and a second auxiliary link for information exchange between the intermediate node and the relay node. road.

57. The base station according to any one of claims 51 to 56, characterized in that the transmitter is specifically configured to pass the physical downlink shared channel of the base station in the first multimedia broadcast single frequency network MBSFN subframe. PDSCH sends the first backhaul data to the intermediate node.

58. The base station according to claim 57, wherein the resources used by the transmitter when sending the first backhaul data are the same as the resources used by the base station when sending downlink data to the user equipment served by the base station. , wherein the resources used by the transmitter when sending the first backhaul data include: the PDSCH of the base station and the first MBSFN subframe. -

59. The base station according to any one of claims 51 to 58, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

60. A relay node, characterized by: including:

A sending unit, configured to send a first scheduling indication message to the intermediate node, where the first scheduling indication message is used to indicate the uplink resources of the access link of the relay node used when transmitting the first backhaul data of the relay node. , and used to cause the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe; the position of the first subframe and the access link The position of one or more uplink transmission subframes of and The position of one or more downlink MBSFN subframes of the backhaul link of the relay node is the same;

A receiving unit configured to receive the first backhaul data sent by the intermediate node in the first subframe.

61. The relay node according to claim 60, characterized in that,

The receiving unit is further configured to receive the second backhaul data of the relay node sent by the base station in one or more downlink MB SF N subframes of the backhaul link.

62. The relay node according to claim 60 or 61, characterized in that the receiving unit is further configured to receive a cache report message sent by the intermediate node, and the cache report message is used to cause the relay to The node sends the first scheduling indication message to the intermediate node.

63. The relay node according to any one of claims 60 to 62, characterized in that the sending unit is specifically configured to pass the physical downlink control channel of the relay node.

The PDCCH sends the first scheduling indication message to the intermediate node.

64. The relay node according to any one of claims 60 to 63, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

65. A relay node, characterized by: including:

A transmitter configured to send a first scheduling indication message to the intermediate node, where the first scheduling indication message is used to indicate the uplink resources of the access link of the relay node used when transmitting the first backhaul data of the relay node. , and used to cause the intermediate node to send the first backhaul data to the relay node according to the first scheduling indication message in the first subframe; the position of the first subframe and the access link The position of one or more uplink transmission subframes of Corresponding to the position of one or more downlink MBSFN subframes of the backhaul link of the relay node same;

A receiver configured to receive the first backhaul data sent by the intermediate node in the first subframe.

66. The relay node according to claim 65, characterized in that,

The receiver is further configured to receive the second backhaul data of the relay node sent by the base station in one or more downlink MBSFN subframes of the backhaul link.

67. The relay node according to claim 65 or 66, characterized in that the receiver is further configured to receive a cache report message sent by the intermediate node, and the cache report message is used to cause the relay to The node sends the first scheduling indication message to the intermediate node.

68. The relay node according to any one of claims 65 to 67, characterized in that the transmitter is specifically used to pass the physical downlink control channel of the relay node

69. The relay node according to any one of claims 65 to 68, characterized in that the intermediate node includes: a user equipment UE with a relay function, or a relay with a UE module.

70. A system for transmitting backhaul data, characterized by comprising: an intermediate node as described in any one of claims 24-41, and/or a base station as described in any one of claims 42-59, and/or Or the relay node according to any one of claims 60-69.