WO2017054126A1

WO2017054126A1 - Method and device for cooperative communications

Info

Publication number: WO2017054126A1
Application number: PCT/CN2015/091052
Authority: WO
Inventors: 曾清海
Original assignee: 华为技术有限公司
Priority date: 2015-09-29
Filing date: 2015-09-29
Publication date: 2017-04-06
Also published as: CN107005887A

Abstract

The embodiments of the present invention provide a method and a device for cooperative communications. The method for cooperative communications of the present invention comprises: a target node receiving a first message sent from a cooperative node, requesting, according to the first message, the cooperative node to send data and receiving data sent by the cooperative node. Accordingly, in the case where the target node does not successfully receive data sent by a source node, data is received by means of the cooperative node without the assistance of a relay node to forward data. Therefore, the solution is simple to implement and low in cost.

Description

Cooperative communication method and device

Technical field

The communication technology of the embodiment of the present invention relates to a cooperative communication method and apparatus.

Background technique

At present, the demand for data services and service types of data services is increasing. The emergence of third-generation mobile communication technologies and Long Term Evolution (LTE) technologies has increased the uplink and downlink rates of data services. The sending and receiving data services need to be implemented within the wireless coverage. Therefore, it is necessary to improve the wireless coverage and improve the wireless transmission efficiency.

Taking LTE as an example, in the LTE protocol version 10, in order to extend base station coverage or increase hotspot coverage under the base station, a relay system is introduced, and the relay system includes two nodes, a base station and a relay node. The base station connects to the relay node through the wireless interface Un, and the relay node connects the user equipment (User Equipment, UE for short) through the wireless interface Uu. In the downlink direction, the base station first sends data to the relay node, and then the relay node forwards the data to the UE. In the uplink direction, the relay node receives the data sent by the UE and forwards the data to the base station.

However, since the relay node is functionally equivalent to one base station, the UE needs to first camp on the cell under the relay node, establish a connection with the relay node, and then obtain the base station to provide services for the UE. Therefore, the function of the relay node is implemented. Complex and costly. Moreover, each time the UE replaces the relay node or the UE leaves the relay node to enter the base station coverage, the base station needs to be notified through the handover process. Therefore, the scheme for assisting forwarding of the uplink and downlink data services by the relay node is complicated.

Summary of the invention

An embodiment of the present invention provides a cooperative communication method and apparatus, to solve the problem in the prior art that whenever a UE replaces a relay node or a UE leaves a relay node to enter a base station coverage, the base station needs to be notified through a handover process, thereby causing a pair of relay nodes. The uplink and downlink data services are more complicated in the scheme of assisting forwarding.

In a first aspect, an embodiment of the present invention provides a cooperative communication method, including:

The target node receives a first message sent by the cooperation node, where the first message indicates the collaboration section Point receiving data sent by the source node to the target node;

The target node requests the cooperative node to send the data according to the first message;

The target node receives the data sent by the collaboration node in response to the request.

In a first possible implementation manner of the first aspect, before the target node receives the first message sent by the collaboration node, the method further includes:

Receiving, by the target node, a second message sent by the management node, the second message is used to notify the target node that the data is received by the collaboration node from the source node, and the second message includes the collaboration The identification information of the node.

According to a first possible implementation manner of the first aspect, in a second possible implementation, before the target node receives the second message sent by the management node, the method further includes:

Obtaining, by the target node, identifier information of the collaboration node;

Determining, by the target node, whether the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold according to the identifier information of the coordinated node;

Receiving, by the target node, the second message sent by the management node, including:

And when the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold, the target node receives the second message sent by the management node.

According to the first aspect, in a third possible implementation manner, the method further includes:

Sending, by the target node, a cooperation request to the cooperation node, where the cooperation request is used to request the cooperation node to receive the data sent by the source node to the target node, where the cooperation request includes the target node Identification information and configuration information of the target node;

And the target node receives the collaboration response sent by the collaboration node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts the collaboration request of the target node.

In a second aspect, an embodiment of the present invention provides a cooperative communication method, including:

If the cooperation node receives the data sent by the source node to the target node, the cooperation node sends a first message to the target node, where the first message indicates that the collaboration node receives the source node and sends the signal to the target node. The data;

The cooperative node receives a request sent by the target node according to the first message, and the request is used to request the cooperative node to send the data to the target node;

The collaboration node sends the data to the target node in response to the request.

In a first possible implementation manner of the second aspect, the source node is received at the collaboration node Before sending the data to the target node, it also includes:

The collaboration node receives a second message sent by the management node, the second message is used to notify the cooperation node to receive the data from the source node, and the second message includes identifier information of the collaboration node.

According to the first possible implementation manner of the second aspect, in a second possible implementation, before the receiving, by the collaboration node, the second message sent by the management node, the method further includes:

The cooperative node sends a measurement signal, where the measurement signal is used by the target node to receive the second message sent by the management node when the measured quantity of the measurement signal is greater than a threshold.

According to the second aspect, in a third possible implementation manner, the method further includes:

The collaboration node receives a collaboration request sent by the target node, where the collaboration request is used to request the collaboration node to receive the data sent by the source node to the target node, where the collaboration request includes the target node Identification information and configuration information of the target node;

The collaboration node sends a collaboration response to the target node, the collaboration response including indication information, the indication information being used to instruct the collaboration node to accept a collaboration request of the target node.

In a third aspect, an embodiment of the present invention provides a cooperative communication apparatus, including:

a receiving module, configured to receive a first message sent by the collaboration node, where the first message indicates that the cooperation node receives data sent by the source node to the cooperative communication device;

a processing module, configured to request the collaboration node to send the data according to the first message;

The receiving module is further configured to receive the data that is sent by the collaboration node in response to the request.

In a first possible implementation manner of the third aspect, the receiving module is further configured to: before receiving the first message sent by the collaboration node, receive a second message sent by the management node, where the second message is used by Notifying the collaborative communication device that the data is received from the source node by the cooperating node, the second message containing identification information of the cooperating node.

According to a first possible implementation manner of the third aspect, in a second possible implementation, the processing module is further configured to acquire the collaboration before the receiving module receives the second message sent by the management node. Determining, by the identifier information of the node, determining, according to the identifier information of the collaboration node, whether the measurement quantity of the measurement signal sent by the collaboration node is greater than a threshold value;

The receiving module is configured to: when the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold, receive the second message sent by the management node.

According to the third aspect, in a third possible implementation manner, the method further includes:

a sending module, configured to send a collaboration request to the collaboration node, where the collaboration request is used to request the collaboration node to receive the data sent by the source node to the collaborative communication device, where the collaboration request includes the collaboration Identification information of the communication device and configuration information of the cooperative communication device;

The receiving module is further configured to receive a collaboration response sent by the collaboration node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts a collaboration request of the cooperative communication device.

In a fourth aspect, an embodiment of the present invention provides a cooperative communication apparatus, including:

a sending module, configured to send a first message to the target node if the data sent by the source node to the target node is received, where the first message indicates that the cooperation node receives the source node and sends the data to the target node The data;

a receiving module, configured to receive a request sent by the target node according to the first message, where the request is used to request the cooperative communication device to send the data to the target node;

The sending module is further configured to send the data to the target node in response to the request.

In a first possible implementation manner of the fourth aspect, the receiving module is further configured to: before receiving data sent by the source node to the target node, receive a second message sent by the management node, where the second message is used by The communication device is notified to receive the data from the source node, and the second message includes identification information of the cooperative communication device.

According to a first possible implementation manner of the fourth aspect, in a second possible implementation, the sending module is further configured to send a measurement signal before the receiving module receives the second message sent by the management node, The measurement signal is configured to receive, by the target node, the second message sent by the management node when a measured quantity of the measurement signal is greater than a threshold.

According to a second aspect, in a third possible implementation, the receiving module is further configured to receive a collaboration request sent by the target node, where the collaboration request is used to request the cooperative communication device to receive the source node Sending the data to the target node, the collaboration request includes identification information of the target node and configuration information of the target node;

The sending module is further configured to send a collaboration response to the target node, where the collaboration response includes indication information, where the indication information is used to instruct the cooperative communication device to accept a collaboration request of the target node.

The cooperative communication method and device according to the embodiment of the present invention, after receiving the first message sent by the cooperation node, the target node requests the cooperation node to send the source node sent by the cooperation node according to the first message. Giving data of the target node and receiving the data sent by the cooperation node, so that if the target node does not successfully receive the data sent by the source node, the target node may request the cooperation node to send the source received by the cooperation node according to the first message. The node sends the data to the target node without the need for the relay node to assist in forwarding the data. Therefore, the solution is simple to implement and low in cost.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a system architecture diagram of extending base station coverage or increasing hotspot coverage under a base station by using a relay system in the prior art;

2A is a system architecture diagram of a cooperative communication method according to an embodiment of the present invention;

2B is a flowchart of a cooperative communication method based on FIG. 2A according to an embodiment of the present invention;

FIG. 3 is a flowchart of another cooperative communication method according to an embodiment of the present invention;

FIG. 4 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention;

FIG. 5 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention;

FIG. 6 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a cooperative communication apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another cooperative communication apparatus according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to introduce the embodiment of the present invention more conveniently, firstly, the relay system is used in the prior art. The extension of the base station coverage or the increase of the hotspot coverage under the base station is described. 1 is a system architecture diagram of extending coverage of a base station by a relay system or increasing hotspot coverage under a base station in the prior art. As shown in FIG. 1 , in the LTE protocol version 10, in order to extend base station coverage or increase hotspot coverage under a base station, A relay system includes two nodes, a base station 101 and a relay node 102. The base station 101 is connected to the relay node 102 via the radio interface Un, and the relay node 102 is connected to the user equipment (User Equipment, UE for short) 103 via the radio interface Uu. In the downlink direction, the base station 101 first transmits data to the relay node 102, and then the relay node 102 forwards the data to the user equipment 103. In the uplink direction, the relay node 102 receives the data sent by the user equipment 103 and forwards the data. To the base station.

2A is a system architecture diagram of a cooperative communication method according to an embodiment of the present invention, and FIG. 2B is a flowchart of a cooperative communication method based on FIG. 2A according to an embodiment of the present invention. When the source node 203 sends data to the target node 202 in FIG. 2A, the target node does not successfully receive the data, and the cooperative node 201 successfully receives the data as an example for introduction. The method of this embodiment is applicable to a case where a source node sends data to a target node in a wireless communication system, and if the target node does not successfully receive the data, the coordinated node can transmit the data to the target node. The method of this embodiment includes the following steps:

S210. The target node receives the first message sent by the cooperation node, where the first message indicates that the cooperation node receives the data sent by the source node to the target node.

S220. The target node requests the cooperation node to send data according to the first message.

S230. The target node receives data sent by the cooperation node in response to the request.

The source node sends data to a target node. If the target node does not successfully receive the data, and the cooperative node for receiving the data by the cooperation target node receives the data, the cooperation node sends the first message to the source node, if the target node Upon receiving the first message, the target node may request the cooperation node to send data sent by the source node to the target node according to the first message, and the target node receives the data sent by the cooperation node in response to the request.

It should be noted that the source node, the target node, and the collaboration node may be user equipment, a micro station, A wireless communication device such as a base station or a wireless fidelity (WiFi) access node. When the source node, the target node, and the collaboration node are user equipments, for example, in a D2D (device to device) communication system, the three can be at least one management node (for example, a base station, a micro station, or a Wi-Fi access point). Conduct the service. When the source node, the target node, and the cooperative node are base stations, micro stations, or Wi-Fi access points, between base stations, between base stations and micro stations, between micro stations and micro stations, base stations and Wi-Fi access Between the points, the Wi-Fi between the microstation and the Wi-Fi access point or Wi-Fi can deliver various information in accordance with the transmission methods specified in the Third Generation Partnership Project (3GPP) protocol.

The cooperative communication method provided by the embodiment, after receiving the first message sent by the cooperation node, the target node requests the cooperation node to send the data sent by the source node to the target node according to the first message, and receives the data sent by the cooperation node. Data, so that in the case that the target node does not successfully receive the data sent by the source node, the target node may request the cooperation node to send the data sent by the source node to the target node according to the first message, without the relay node assisting forwarding. Data, therefore, the solution is simple to implement and low in cost.

FIG. 3 is a flowchart of another cooperative communication method according to an embodiment of the present invention. The method of this embodiment is applicable to a situation in which a source node sends data to a target node in a wireless communication system. If the target node does not successfully receive the data, the coordinated node may send the data to the target node. The solution provided in this embodiment is used in combination with the embodiment shown in FIG. 2B. The method in this embodiment includes the following steps:

S310. If the collaboration node successfully receives the data sent by the source node to the target node, the collaboration node sends a first message to the target node, where the first message indicates that the collaboration node receives the source node and sends the data to the target node. The data.

The source node sends data to a target node. If the target node does not successfully receive the data, and the partner node of the target node successfully receives the data, the collaboration node sends the first message to the source node.

S320. The collaboration node receives a request sent by the target node according to the first message.

If the target node receives the first message, the target node may request the cooperation node to send data sent by the source node to the target node received by the cooperation node.

S330. The collaboration node sends a data to the target node in response to the request.

The collaboration node sends data to the target node in response to the request of the target node.

The cooperative communication method provided in this embodiment is provided by the source node if the cooperation node successfully receives the transmission Giving the data of the target node, the cooperation node sends a first message to the source node, and the cooperation node receives the request sent by the receiving target node according to the first message and sends data to the target node in response to the request, so that the source node is not successfully received at the target node. In the case of the transmitted data, the cooperation node receives the request sent by the target node according to the first message and sends the data to the target node in response to the request, and does not need the relay node to assist in forwarding the data. Therefore, the solution is simple to implement and low in cost.

To describe the method embodiment shown in FIG. 2B and FIG. 3 in detail, the overall flow of the cooperative communication method is introduced in conjunction with FIG. 4. FIG. 4 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention. In this embodiment, the source node and the management node are used as the base station. If the user equipment 2 is the target node, the user equipment 1 is the collaboration node, and the user equipment 2 has multiple cooperation nodes, the user equipment 1 is only used as the user. A collaborative node of device 2 is exemplified. Referring to FIG. 4, the method of this embodiment may include the following steps:

S401. The user equipment 2 acquires identification information of the user equipment 1.

The user equipment 2 can perform the collaborative node search process. For example, the user equipment 2 can obtain the identification information of the user equipment 1 in various manners. For example, the user equipment 1 periodically broadcasts the information identified by the user, and the user equipment 2 can receive the user equipment 1 The identification information of the user equipment 1 is obtained by the identification function.

S402. The user equipment 2 determines, according to the identifier information of the user equipment 1, whether the measured quantity of the measurement signal sent by the user equipment 1 is greater than a threshold. If it is determined that the measured amount of the measurement signal transmitted by the received user equipment 1 is greater than the threshold value, then S403 is performed.

It should be noted that the number of the user equipments 1 may be one or more. For example, if the user equipment 2 obtains the identification information of the two user equipments 1 through the neighboring area discovery function, the user equipment 2 may receive any one of them. The user equipment 2 can determine whether the user equipment 2 receives the second message sent by the base station according to whether the measured quantity of the measurement signal sent by the two user equipments 1 received by the user equipment 1 is greater than the threshold value. The measurement quantity of the measurement signal may be, for example, a measurement signal strength, a signal to noise ratio of the measurement signal, and a channel quality indication (CQI) of the measurement signal. If it is determined that the measured quantity of the measurement signal sent by the user equipment 1 is greater than The threshold value, the user equipment 2 can receive the second message sent by the base station. This threshold is determined based on the signal quality required between the two user equipments.

S403. The user equipment 2 receives the second message sent by the base station.

The second message is used to notify the user equipment 2 that the data is received from the base station by the user equipment 1, and the second The message contains the identification information of the user equipment 1. The identification information of the user equipment 1 is, for example, the Cell Radio Network Temporary Identifier (C-RNTI) of the user equipment in LTE, and the media access control of the user equipment if it is a Wi-Fi system. , referred to as MAC) address.

It should be noted that, in S402 to S403, if the user equipment 2 determines that the measured quantity of the measurement signal sent by the user equipment 1 is greater than the threshold, the user equipment 2 may report the measurement quantity of the measurement signal sent by the user equipment 1 to the base station. It is determined by the base station whether to notify the user equipment 2 to receive data from the base station through the user equipment 1, and the second message contains the identification information of the user equipment 1.

The base station determines, according to an internal algorithm, whether to notify the user equipment 2 to receive data from the base station through the user equipment 1, for example, the base station configures a node with a better channel measurement between the user equipment 2 as a cooperative node, and the base station is also likely to be a distance user. The nodes that are close to the device 2 are configured as cooperative nodes, and the base station can also limit the number of cooperative nodes to reduce the burden of receiving the cooperative nodes.

S404. The user equipment 1 receives the second message sent by the base station.

The user equipment 1 receives the second message sent by the base station, and the second message is used by the base station to notify the user equipment 1 as a cooperative node and receives data sent by the base station to the user equipment 2 from the base station, and the second message includes the identification information of the user equipment 1. The identification information of the user equipment 1 is, for example, the C-RNTI of the user equipment in LTE, and the MAC address of the user equipment if it is a Wifi system.

Through S401-S404, the configuration process of the cooperative node is completed. It should be noted that the cooperative node configuration scheme in S401-S404 is centralized. Thereafter, if the base station sends data to the user equipment 2, the user equipment 2 does not successfully receive the data. Data, but the user equipment 1 receives the data, the user equipment 2 can request the user equipment 1 to send the data sent by the base station to the user equipment 2 to the user equipment 1 to send the data to the user equipment 2, the detailed process Refer to S405-S408.

S405. The base station sends data to the user equipment 2.

If the user equipment 2 does not receive the data sent by the base station, and the user equipment 1 receives the data sent by the base station to the user equipment 2, then S406 is performed.

S406. The user equipment 1 sends a first message to the base station.

After any node successfully receives data successfully, it is determined that the target node is itself according to the identification information of the target node included in the data, and the first message may be sent to the base station on the feedback channel, and the first message may be an indication of successful reception, such as confirmation ( Acknowledgement (abbreviated as ACK) message, the process ends. If the target node is not itself based on the identification information of the target node included in the data, The received data can be sent to the target node in a subsequent process.

It should be noted that when multiple user equipments or multiple receiving nodes receive success, the same receiving success indication is sent together, and the first messages are superimposed on each other. Since the data is exactly the same, they are not mutually The base station can receive the first message and consider that the data is sent successfully. For example, if the base station receives the first message sent by the user equipment 1, the base station considers that the user equipment 1 receives the data sent by the base station to the user equipment 2.

S407. The user equipment 2 requests the user equipment 1 to send data according to the first message.

If the user equipment 2 does not successfully receive data, but according to the addressing information of the data sent by S406, the target node is itself, the user equipment 2 listens on the indication channel (such as ACK feedback channel in LTE), if the first is monitored The message indicates that at least one node successfully received the data sent by the base station to the user equipment 2. Alternatively, the user equipment 2 may also monitor the indication information by using the monitoring indication channel, and the indication information is used to indicate that the at least one cooperative node successfully receives the data sent by the base station to the device 2. In this embodiment, if the user equipment 2 listens to the first message sent by the user equipment 1, the user equipment 2 determines that the user equipment 1 successfully receives the data sent by the base station to the user equipment 2, and the user equipment 2 may request the user equipment 1 to send the data. Give user device 2.

Specifically, when the user equipment 2 requests the user equipment 1, the time-frequency resource, the channel, and the modulation and coding mode required for the user equipment 1 to send data to the user equipment 2 are configured, and the user equipment 1 performs the specified time-frequency resources and channels according to the specified time. The modulation and coding method transmits data to the user equipment 2.

Since the cooperation node may cache multiple data packets at the same time, the request message may implicitly or explicitly indicate that the user equipment 1 sends the data sent by the base station in S306, which may be through the addressing information of the data, the time of data reception, or the hybrid automatic weight. The process number of the Hybrid Automatic Repeat ReQuest (HARQ) process determines the specific data, and the time of the data reception may be, for example, a system frame number (SFN) and a transmission time interval (Transmission Time Interval). TTI).

It should be noted that, in order to avoid buffering too much data, if the target node does not request to transmit data within the set time, the corresponding cached data may be cleared.

S408. The user equipment 1 sends data to the user equipment 2 in response to the request of the user equipment 2.

The foregoing S401-S404 shows a cooperative node configuration process, and the embodiment of the present invention can also implement the cooperative node configuration in other manners, and configure the collaboration node in a distributed manner, which can be implemented as follows:

The user equipment 2 sends a cooperation request to the user equipment 1 for requesting the user equipment 1 to receive data sent by the base station to the user equipment 2, where the cooperation request includes at least the identification information of the user equipment 2 and the configuration information of the user equipment 2; Receiving a collaboration response message sent by the user equipment 1, the cooperation response includes indication information indicating that the cooperation node accepts the request of the target node. The configuration information of the user equipment 2 includes information such as a radio technology, a radio resource, and a modulation and coding scheme transmitted between the devices. For example, when a device-to-device (D2D) transmission is used, the base station can configure the D2D transmission. Resource (or resource pool) information or D2D identification information to the user equipment. If the node communication is not controlled by the base station, such as inter-node communication via wifi or Bluetooth technology, the base station does not need to be managed.

The cooperation request may also carry the base station information to which the user equipment 2 belongs, such as the common channel information of the base station, the Time Division Duplexing (TDD) configuration of the base station, and the discontinuous reception of the user equipment 2 (Discontinuous Reception, referred to as The DRX) configuration, the control channel information, the data channel information, the feedback channel information, and the like may also indicate that the user equipment 1 obtains the base station information of the user equipment 2 from the base station to which the user equipment 2 belongs, so that the user equipment 1 receives the base station and sends the information to the user equipment 2. data.

After receiving the cooperation request, the user equipment 1 can participate in cooperation according to its own configuration, capabilities (such as battery capacity, receiver capability) and current transmission status (if user equipment 1 is currently idle, if user equipment 1 is performing large data volume) When communicating, the cooperation can be rejected. It is judged whether or not the user equipment 2 is required to perform data reception. These judgments may be determined according to the policy of the user equipment 1 or the policy of the base station, which is an implementation problem and will not be described in detail herein. After the user equipment 1 decides to cooperate with the user equipment 2, it sends a cooperation response to the user equipment 2. The user equipment 2 can simultaneously send a collaboration request to multiple user equipments to request cooperation, but the number is not too much, otherwise the overhead of participating cooperative nodes is too large.

The configuration information of the user equipment is used to configure information such as radio technology, radio resources, and modulation and coding modes transmitted between user equipments. For example, when D2D transmission is used, resource (or resource pool) information or D2D identification information during D2D transmission may be configured. If wifi or Bluetooth technology performs inter-node communication, the configuration information corresponding to the wireless technology is transmitted for use in subsequent data transmission between nodes.

The identification information of the user equipment is, for example, addressing information of the user equipment (the LTE system may be a C-RNTI or the WIFI system is a MAC address).

The cooperative communication method provided by this embodiment is sent by the source node not successfully receiving the source node. The data is transmitted to the target node by the cooperative node that successfully receives the data sent by the source node, and the relay node is not required to assist in forwarding the data. Therefore, the solution is simple to implement and low in cost. Moreover, on the basis that the cooperative node successfully receives the data, the data is transmitted through the cooperative node, thereby avoiding the transmission between the source node and the target node, saving the air interface resource and improving the resource utilization efficiency.

This embodiment uses the LTE system as an example to describe S405-S408 in the embodiment shown in FIG. 4 in detail.

In S405, the base station sends data to the user equipment 2, including control information and service data. The control information is transmitted through a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short), and the service data is transmitted through a physical downlink shared channel (Physical Downlink Shared Channel, short for short). PDSCH) transmission, control information indicates time-frequency information, transmission mode information, modulation and coding information, etc. of the data. The user equipment 2 uses the control information sent to it by its corresponding C-RNTI blind detection base station on the search space corresponding to the PDCCH. The user equipment 1 determines whether the data transmitted by the base station to the user equipment 2 is to be cached by the control information sent by the base station 2 to the user equipment 2 by the blind detection base station. The blind detection control information may bring the overhead of computing resources. The user equipment 1 can blindly check the control information sent by the base station to itself and blindly check the control information of the user equipment 2, so that the user equipment 1 does not simultaneously perform the cooperative transmission phase. Interrupt its own transmission. It can be understood that the user equipment 1 can preferentially blindly detect the control information sent by the base station to itself. If the blind detection succeeds, the control information sent by the base station to other nodes (for example, the user equipment 2) is not blindly detected. Or, in the DRX off state when the user equipment 1 determines that there is no service, the control information sent by the base station to the user equipment 2 is blindly detected to assist the user equipment 2, so that the user equipment 1 may not be brought The extra overhead is only the utilization of the idle computing resources of user equipment 1.

In this embodiment, for example, the base station sends control information to the user equipment 2 through the PDCCH in the subframe n. The user equipment 1 and the user equipment 2 simultaneously monitor and blindly check the control information sent by the base station through the PDCCH in the subframe, and assume that the user equipment 1 and the user equipment 2 have the capability to simultaneously monitor the control information sent by the base station to all nodes, that is, in this example. Both user equipment 1 and user equipment 2 blindly check the C-RNTI. In subframe n, user equipment 1 and user equipment 2 successfully control the information with the C-RNTI of user equipment 2. Then both user equipment 1 and user equipment 2 know that in subframe n, the data transmitted by the base station through the PDSCH is for the user equipment 2. The user equipment 1 and the user equipment 2 receive and decode the corresponding data according to the time-frequency information, the transmission mode information, and the modulation and coding information indicated in the control information. The user equipment 1 successfully receives and correctly decodes the data, and the user equipment 2 fails to receive, and the user sets The device 1 caches the data, and also stores the identification information of the user equipment 2 corresponding to the data, which is used to indicate that the data belongs to the user equipment 2. The user equipment 1 may also cache the control information corresponding to the data, or the HARQ process number information. It is used to determine which service data the subsequent user equipment 2 indicates to retransmit. In order to ensure that the buffer usage is not excessive, a timer can be set. When the timer expires, the buffer resource is cleared or the HARQ resource is reset, and only the free buffer resource is used, the node participates in the cache process.

In another method, the number of blind detections of the C-RNTI can be reduced, and the configuration node can uniformly allocate a group of Radio Network Temporary Identifiers (G-RNTIs) to a group of coordinated nodes, and the sending addressing information can be G-RNTI plus a target node identifier contained in the control information. The management node may configure the G-RNTI to each node when the cooperative node is configured in a centralized manner as described above. Each node decodes the control information by blindly checking the same G-RNTI. After the decoding is successful, the node identifier in the content is read to confirm the specific target node.

In S406, the user equipment 1 sends the first message to the base station as an ACK message, and the user equipment 1 can feed back the ACK message through the PUCCH, and the PUCCH is mapped to the resource index where the PDCCH is located, that is, the PDCCH of the downlink grant can obtain the corresponding PDCCH. The location of the PUCCH resource is located, and the PUCCH and the PDCCH are separated by 4 subframes, so the subframe n+4 will correspond to the PDCCH/PDSCH of n.

The user equipment 1 has successfully received the service data sent to the user equipment 2, so when the subframe n+4, the user equipment 1 sends an ACK message on the corresponding PUCCH channel to notify the base station that the data packet has been successfully received. . At the same time, the user equipment 2 does not successfully receive the service data because it only receives the control information. Therefore, the user equipment 2 listens to the ACK message corresponding to the PUCCH channel in the subframe n+4. When the user equipment 2 listens to the ACK message, the user equipment 2 can know that at least one of the nodes has successfully received the service data that should be sent to it.

It should be noted that, if other user equipments are also successfully received, according to the above rules, the user equipment 1 and other user equipments simultaneously send ACK messages in the PUCCH channel of the subframe n+4 subframe. Since the data is the same, they do not interfere with each other after stacking, so this process will not be affected.

If both user equipment 1 and user equipment 2 are not successfully received, no subframe will be fed back to the ACK message when the subframe is n+4 subframes. If the base station does not receive the ACK message, it is known that the service data is not successfully transmitted. Subsequent subframes will be retransmitted by the base station.

If the user equipment 2 receives success, the user equipment 2 feeds back an ACK message to the base station in subframe n+4.

After the user equipment 2 listens to the ACK message, it sends a request message. In S308: User Equipment 2 may send a request message through a peer-to-peer transmission technique. The request message may include the identification information of the user equipment 2 to let the receiver know that the requester is the user equipment 2. The request may further carry the indication information to indicate that the service data sent by the base station in the S306 is retransmitted, and the service data in the service data is sent by carrying the subframe n to indicate that the service data at a certain moment is retransmitted, for example, the indication information. For TTI offset=8, if the user equipment 2 sends a request message in the n+8th subframe, it is desirable to retransmit the data of the nth subframe, and the indication message may be displayed to be carried in the request message. Further, the request message may further carry time-frequency information, transmission mode information, modulation and coding information, etc., for indicating when the user equipment 1 transmits the service data to the user equipment 2 with which transmission format and modulation and coding information. .

In S408, the user equipment 1 determines the service data to be transmitted in response to the request of the user equipment 2, and after obtaining the service data from the cache, if the time-frequency information, the transmission mode information, and the modulation and coding information are configured in the request of the user equipment 2, The transmission is performed according to the time-frequency information, the transmission mode information, and the modulation and coding information configured in the request message. If multiple cooperative nodes receive it, the same message will be sent in the same format on the same resource in time, and will not interfere with each other.

If the corresponding time-frequency information, the transmission mode information, and the modulation and coding information are not configured, the user equipment 1 allocates resources according to the distributed resource scheduling manner of the transmission technology, for example, the distributed resources in the D2D are through a common resource. The pool is seized. If multiple cooperative nodes (user equipments) receive the request, the user equipment 2 may receive multiple retransmissions. After the user equipment 2 successfully collects, the upper layer protocol may perform repeated packet detection, and discard duplicate packets if cooperation If the number of nodes is as small as two nodes, it will not cause too many duplicate packets and avoid waste of resources.

The function and technical effects of the cooperative communication method provided by this embodiment are similar to those of the embodiment shown in FIG. 4, and details are not described herein again.

In this embodiment, the WiFi system is taken as an example. The difference between this embodiment and the foregoing LTE system-based embodiment is that the source node in this embodiment is a WiFi access point. Referring to FIG. 5, FIG. 5 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention.

S501. The WiFi access point sends data to the user equipment 2.

The data sent by the access point to the user equipment 2 includes the identification information of the target node, that is, includes The identification information of the user equipment 2, in this embodiment, the user equipment 1 successfully receives the data, and the user equipment 2 fails to receive the data.

S502. The user equipment 1 sends an ACK message to the WiFi access point.

After any of the cooperative nodes successfully receives the data successfully, the first message, such as an ACK message, may be sent to the WiFi access point after the data is sent. If multiple cooperative nodes receive success, the ACK message will be sent together at the same time. Since the sent ACK message is the same, it will not affect the WiFi access point reception. For example, in this embodiment, the user equipment 1 successfully receives the data and feeds back an ACK message to the WiFi access point. The sending node address in the ACK message may be filled in as the MAC address of the user equipment 2, or the MAC address of the user equipment 1 is filled in. .

If the user equipment 2 does not successfully receive the data sent by the WiFi access point to the user equipment 2, the ACK message is monitored, for example, a Cyclical Redundancy Check (CRC) error is received after the data is received, and the ACK message is monitored. If the ACK message is received, in this embodiment, the user equipment 2 listens to the ACK message sent by the user equipment 1, and the user equipment 2 can know that at least one node has successfully received the data that should be sent to it. Alternatively, the user equipment 2 can monitor the indication information, and the indication information can be used to know that at least one node has successfully received the data that should be sent to it. If the indication information carries the identifier, the other node successfully receives the data sent by the WiFi access point to the user equipment 2. The indication information can indicate which node was successfully received.

S503. The user equipment 2 requests the user equipment 1 to send data according to the ACK message.

After the user equipment 2 completes the channel occupation, the user equipment 2 may request the user equipment 1 to transmit the buffered data. The request may display or implicitly indicate which data packet is retransmitted, and may request retransmission of the data packet by the time of the data packet transmission or the serial number of the data packet. If the sending node address in the ACK message in S502 is filled in as the MAC address of the user equipment 2, the user equipment 2 may send a request by broadcast to all the cooperative nodes. The user equipment 2 should indicate in the message who is requesting retransmission, such as carrying the MAC address of the user equipment 2 as the transmission address in the message. If the ACK message in S502 carries the MAC address of the user equipment 1, the user equipment 2 may send a request to the user equipment 1 to request the user equipment 1 to retransmit the buffered data. The request may also carry the feature information requesting retransmission of the cached data, such as the serial number of the data, or the information such as the ID number of the corresponding data, for explicitly identifying which cached data to retransmit. Or the request information implicitly requests the cooperative node information to retransmit the previous or unique cached data.

S504. The user equipment 1 sends data to the user equipment 2 in response to the request of the user equipment 2.

FIG. 6 is a signaling flowchart of still another cooperative communication method according to an embodiment of the present invention. The difference between the embodiment and the embodiment shown in FIG. 4 is that the source node in the embodiment is a user equipment, the target node is a micro-station 2, and the micro-station 1 is a cooperative node, wherein there may be multiple cooperative nodes, where only Take the micro station 1 as an example. Referring to FIG. 6, the method of this embodiment may include the following steps:

The cooperative node configuration process in this embodiment may refer to the centralized and distributed configuration process in the embodiment shown in FIG. 4, but the centralized and distributed configuration process in the embodiment shown in FIG. 4 is different from the present embodiment. In the middle, the source node (user equipment) performs collaborative node search. For example, the process of centrally configuring the collaboration node is as follows:

S601. The user equipment sends information of the micro station 1 and the micro station 2 to the management node.

In this embodiment, the user equipment not only searches for the micro-station 2, but also searches for the micro-station 1 in the vicinity of the micro-station 2, and the user equipment reports the information of the micro-station 1 and the micro-station 2 to the management node. The management node can be a large coverage base station, and the user equipment is connected to the management node through the air interface; the management node can also be a server, and the server connects to any base station by wire, and the user equipment is wirelessly sent to the connected base station, and then the base station forwards to the base station. server. The information of the micro station 1 and the micro station 2 is, for example, information such as a frequency point, a bandwidth, an uplink and downlink subframe configuration, a physical cell identifier, and a cell identifier.

After receiving the information of the micro station 1 and the micro station 2, the management node determines whether the cooperation node is configured and which nodes are configured as the cooperation node.

S602. The management node sends a second message to the micro station 2.

S603. The management node sends a second message to the micro station 1.

In the embodiment, when the user equipment sends data to the micro station 2, the micro station 1 can serve as a cooperation node.

When the management node sends the second message to the micro station 1, the second message is used to notify the micro station 1 as the cooperation node and receives the data sent by the user equipment to the micro station 2 from the base station user equipment, and the second message includes the identification information of the micro station 1. . When the management node separately sends the second message to the micro-station 2, the second message is used to notify the micro-station 2 that the data is received from the user equipment through the micro-station 1, and the second message contains the identification information of the micro-station 1.

The configuration information of the target node may be a frequency point, a bandwidth, an uplink and downlink subframe configuration, and a physical cell identifier. Information such as the cell identifier and the identity of the base station.

Through S601-S603, the collaborative node configuration process is completed. It should be noted that the cooperative node configuration scheme in S601-S603 is centralized. Thereafter, if the user equipment sends data to the micro station 2, the micro station 2 does not successfully receive the data. Data, but the microstation 1 receives the data, the microstation 2 can send a request message to the microstation 1 to cause the microstation 1 to transmit the data to the microstation 2. For details, refer to S604-S607.

S604. The user equipment sends data to the micro station 2.

If the microstation 2 does not receive the data transmitted by the user equipment, and the micro station 1 receives the data transmitted by the user equipment to the micro station 2, then S604 is performed.

The microstation 2 schedules the user equipment to transmit data to the microstation 2. In the LTE standard, a dispatcher, that is, a microstation 2, transmits a received packet grant information (uplink grant information) on a control channel (PDCCH), which includes physical layer time-frequency information and transmission used by a packet that the scheduler wants to receive. Mode information, modulation and coding information, etc., are used to indicate how the user equipment transmits data (PUSCH). The user equipment sends data to the microstation 2 according to the uplink grant information.

Since the dispatcher is also the receiver, the difference from the embodiment shown in FIG. 3 is that when the user equipment sends data, the receiving node (micro station) does not need to obtain data through blind detection, but can directly receive data according to the scheduling signaling. The PDCCH signaling for transmitting the uplink grant information in the LTE FDD system is separated from its corresponding data portion PUSCH by 4 subframes. There are four methods for the cooperation node (micro station 1) to obtain the uplink authorization information sent by the micro station 2 to the user equipment;

First, when the micro-station 2 transmits the uplink grant information, like the user equipment, the micro-station 1 listens to the uplink grant information sent by the micro-station 2. This method is suitable for the microstation 1 to be in the receiving state at this time, and if there is data or signaling to be transmitted at the time corresponding to the microstation 1, the cooperation cannot be performed. Second, after the micro-station 2 sends the uplink grant information to the user equipment, and before the user equipment sends the data, when the micro-station 1 receives the status, the micro-station 2 sends the uplink grant information to the micro-station 1, the limitation of the method is that The timing of the uplink authorization information cannot be sent later than the user equipment. The third is that the micro-station 2 and the micro-station 1 transmit the uplink authorization information sent to the user equipment through other communication methods, such as wired or multiple point-to-point transmission technologies. Another method is to send the uplink authorization information to all the cooperative nodes before the micro-station 2 sends the uplink authorization information to the user equipment. In this embodiment, the micro-station 1 is sent to the micro-station 1, for example, a total scheduling node first grants an uplink authorization. The information is sent to the micro station 1 and the micro station 2, and the uplink authorization information may be 0, which is used to instruct the micro station 2 to schedule information of the user equipment, where the information may be carried. The information display or implicit indication is sent by the micro-station 2 to the user equipment, and then the micro-station 1 is ready to receive the data transmitted by the user equipment to the micro-station 2 as indicated by the information 0. The total scheduling node may be a wired connection to each collaboration node, or a large coverage base station may be connected to each collaboration node by wireless, or may be a functional module, and may reside on any node, and only need to send information 0 to other nodes. The collaboration node is fine.

S605. The micro station 1 sends a first message to the user equipment.

The user equipment transmits data to the micro station 2 in n+4 subframes according to the uplink grant information. Both the microstation 1 and the microstation 2 receive data. After receiving the data according to the uplink grant information, the micro station 1 and the micro station 2 check the CRC to determine whether the data is received correctly. If it is correct, it needs to feed the first message at the corresponding time n+8 subframes, and the corresponding feedback channel. The first message in the embodiment is an ACK message. If the microstation 2 successfully receives, the ACK message is returned according to the normal procedure and ends. If the microstation 2 does not receive successfully, the microstation 2 needs to know whether other nodes have successfully received (in this embodiment, the microstation 2 needs to know whether the microstation 1 successfully receives). If the microstation 1 receives the ACK message successfully, the micro station 1 can feed back the ACK message, and the micro station 2 can obtain the information by listening to the ACK message. Since the micro station 2 may receive multiple node information at the same time, it is also necessary to feed back other node ACK information at this moment. , the micro station 2 can no longer perform ACK monitoring at this moment, and the micro station 1 can access the technology through wired or multiple point-to-point transmission technologies, and the micro station 1 will successfully receive the user without affecting the current other ACK transmission of the micro station 2. The information indication of the device data is sent to the microstation 2.

S606. The micro station 2 requests the micro station 1 to send data according to the first message.

The microstation 2 requests the microstation 1 to transmit data transmitted by the user equipment to the microstation 2 to the microstation 2.

S607. The microstation 1 transmits data to the microstation 2 in response to the request of the microstation 2.

FIG. 7 is a schematic structural diagram of a cooperative communication apparatus according to an embodiment of the present invention. The cooperative communication device of the present embodiment is applicable to a method in which a source node transmits data to a target node in a wireless communication system, and if the target node does not successfully receive the data, the coordinated node can transmit the data to the target node. The collaborative communication device is typically implemented in hardware and/or software. The cooperative communication device includes the following modules: a receiving module 710 and a processing module 720.

The receiving module 710 is configured to receive a first message sent by the collaboration node, where the first message indicates that the cooperation node receives data sent by the source node to the cooperative communication device, and the processing module 720 is configured to: The first message requests the cooperation node to send data; the receiving module 710 is further configured to receive data sent by the cooperation node in response to the request.

The cooperative communication device provided by the embodiment, after receiving the first message sent by the cooperation node, requests the cooperation node to send data sent by the source node to the cooperative communication device according to the first message according to the first message, and receives the data sent by the cooperation node. In order to achieve that the target node does not successfully receive the data sent by the source node, the target node may request the cooperation node to send the data sent by the source node to the target node according to the first message, without the relay node assisting in forwarding the data. Therefore, the solution is simple to implement and low in cost.

On the basis of the foregoing embodiment shown in FIG. 7, the receiving module 710 is further configured to: before receiving the first message sent by the cooperative node, receive a second message sent by the management node, where the second message is used for cooperative communication. The device notification receives data from the source node through the cooperation node, and the second message contains identification information of the cooperation node.

Further, the processing module 720 is further configured to: before the receiving module receives the second message sent by the management node, acquire the identifier information of the collaboration node; and determine, according to the identifier information of the collaboration node, whether the measurement quantity of the measurement signal sent by the collaboration node is greater than a threshold. value;

Further, the receiving module 710 is specifically configured to: when the measured quantity of the measurement signal sent by the cooperative node is greater than a threshold, receive the second message sent by the management node.

Further, it also includes:

a sending module, configured to send a collaboration request to the cooperation node, where the cooperation request is used to request the cooperation node to receive data sent by the source node to the cooperative communication device, where the cooperation request includes the identification information of the cooperative communication device and the configuration information of the cooperative communication device;

The receiving module 710 is further configured to receive a collaboration response sent by the collaboration node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts the collaboration request of the target node.

It should be noted that the receiving module 710 in the embodiment of the present invention may correspond to the receiver of the user equipment, and may also correspond to the transceiver of the user equipment. The sending module may correspond to a transmitter of the user equipment, or may correspond to a transceiver of the user equipment. The processing module 720 may correspond to a processor of the user equipment, where the processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or implement an embodiment of the present invention. One or more integrated circuits. The user equipment may further comprise a memory for storing the instruction code, the processor invoking the instruction code of the memory, controlling the implementation of the invention The receiving module 710 and the transmitting module in the example perform the above operations.

FIG. 8 is a schematic structural diagram of another cooperative communication apparatus according to an embodiment of the present invention. The cooperative communication device of this embodiment is suitable for use in a wireless communication system in which a source node transmits data to a target node, and if the target node does not successfully receive the data, the coordinated node may transmit the data to the target node. The collaborative communication device is typically implemented in hardware and/or software. The cooperative communication device includes the following modules: a transmitting module 810 and a receiving module 820.

The sending module 810 is configured to: if the data sent by the source node to the target node is received, send the first message to the target node; the receiving module 820 is configured to receive the request sent by the target node according to the first message; the sending module 810 is further configured to: Send data to the target node in response to the request.

The cooperative communication device provided in this embodiment, if the data sent by the source node to the target node is successfully received, the cooperative communication device sends the first message to the source node, and receives the request sent by the receiving target node according to the first message and responds to the request. Requesting to send data to the target node, in a case that the target node does not successfully receive the data sent by the source node, the cooperative communication device receives the request sent by the target node according to the first message and sends the data to the target node in response to the request, without relaying Nodes assist in forwarding data, so the solution is simple to implement and less expensive.

Further, the receiving module 820 is further configured to: before receiving the data sent by the source node to the target node, receive a second message sent by the management node, where the second message is used to notify the cooperative communication device to receive data from the source node, where the second message includes Identification information of the collaboration node.

Further, the sending module 810 is further configured to: before the receiving module receives the second message sent by the management node, send a measurement signal, where the measurement signal is used by the target node to receive the second sent by the management node when the measured quantity of the measurement signal is greater than a threshold Message.

Further, the receiving module 820 is further configured to receive a collaboration request sent by the target node, where the cooperation request is used to request the cooperative communication device to receive data sent by the source node to the target node, where the cooperation request includes the identifier information of the target node and configuration information of the target node;

The sending module 820 is further configured to send a collaboration response to the target node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts the collaboration request of the target node.

It should be noted that the sending module 810 in the embodiment of the present invention may correspond to the transmitter of the user equipment, and may also correspond to the transceiver of the user equipment. The receiving module 820 may correspond to a receiver of the user equipment, or may correspond to a transceiver of the user equipment. The user equipment may further include a memory for storing the instruction code, the processor calling the instruction code of the memory, and controlling the embodiment of the present invention The transmitting module 810 and the receiving module 820 perform the above operations.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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 may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A cooperative communication method, comprising:

Receiving, by the target node, a first message sent by the cooperation node, where the first message indicates that the cooperation node receives data sent by the source node to the target node;

The target node requests the cooperative node to send the data according to the first message;

The target node receives the data sent by the collaboration node in response to the request.
The method according to claim 1, wherein before the target node receives the first message sent by the cooperation node, the method further includes:

Receiving, by the target node, a second message sent by the management node, the second message is used to notify the target node that the data is received by the collaboration node from the source node, and the second message includes the collaboration The identification information of the node.
The method according to claim 2, further comprising: before the target node receives the second message sent by the management node, further comprising:

Obtaining, by the target node, identifier information of the collaboration node;

Determining, by the target node, whether the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold according to the identifier information of the coordinated node;

Receiving, by the target node, the second message sent by the management node, including:

And when the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold, the target node receives the second message sent by the management node.
The method of claim 1 further comprising:

Sending, by the target node, a cooperation request to the cooperation node, where the cooperation request is used to request the cooperation node to receive the data sent by the source node to the target node, where the cooperation request includes the target node Identification information and configuration information of the target node;

And the target node receives the collaboration response sent by the collaboration node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts the request of the target node.
A cooperative communication method, comprising:

If the cooperation node receives the data sent by the source node to the target node, the cooperation node sends a first message to the target node, where the first message indicates that the cooperation node receives the source node and sends the data to the target node. The data of the node;

Receiving, by the cooperation node, the request sent by the target node according to the first message, the request Requesting to request the cooperative node to send the data to the target node;

The collaboration node sends the data to the target node in response to the request.
The method according to claim 5, wherein before the cooperation node receives the data sent by the source node to the target node, the method further includes:

The collaboration node receives a second message sent by the management node, the second message is used to notify the cooperation node to receive the data from the source node, and the second message includes identifier information of the collaboration node.
The method according to claim 6, wherein before the cooperation node receives the second message sent by the management node, the method further includes:

The cooperative node sends a measurement signal, where the measurement signal is used by the target node to receive the second message sent by the management node when the measured quantity of the measurement signal is greater than a threshold.
The method of claim 5, further comprising:

The collaboration node receives a collaboration request sent by the target node, where the collaboration request is used to request the collaboration node to receive the data sent by the source node to the target node, where the collaboration request includes the target node Identification information and configuration information of the target node;

The collaboration node sends a collaboration response to the target node, the collaboration response including indication information, the indication information being used to indicate that the collaboration node accepts the collaboration request of the target node.
A cooperative communication device, comprising:

a receiving module, configured to receive a first message sent by the collaboration node, where the first message indicates that the cooperation node receives data sent by the source node to the cooperative communication device;

a processing module, configured to request the collaboration node to send the data according to the first message;

The receiving module is further configured to receive the data that is sent by the collaboration node in response to the request.
The apparatus according to claim 9, wherein the receiving module is further configured to: before receiving the first message sent by the cooperative node, receive a second message sent by the management node, where the second message is used to The target node notifies receipt of the data from the source node by the collaboration node, and the second message includes identification information of the collaboration node.
The device according to claim 10, wherein the processing module is further configured to: before the receiving module receives the second message sent by the management node, acquire identifier information of the collaboration node; according to the collaboration node Identification information, determining whether a measurement quantity of the measurement signal sent by the cooperation node is greater than a threshold value;

The receiving module is configured to: when the measured quantity of the measurement signal sent by the coordinated node is greater than a threshold, receive the second message sent by the management node.
The device according to claim 9, further comprising:

a sending module, configured to send a collaboration request to the collaboration node, where the collaboration request is used to request the collaboration node to receive the data sent by the source node to the target node, where the collaboration request includes the target node Identification information and configuration information of the target node;

The receiving module is further configured to receive a collaboration response sent by the collaboration node, where the collaboration response includes indication information, where the indication information is used to indicate that the collaboration node accepts a collaboration request of the target node.
A cooperative communication device, comprising:

a sending module, configured to send a first message to the source node if the data sent by the source node to the target node is received, where the first message indicates that the collaborative communication device receives the source node and sends the data to the target The data of the node;

a receiving module, configured to receive a request sent by the target node according to the first message, where the request is used to request the cooperative node to send the data to the target node;

The sending module is further configured to send the data to the target node in response to the request.
The apparatus according to claim 13, wherein the receiving module is further configured to: before receiving data sent by the source node to the target node, receive a second message sent by the management node, where the second message is used Notifying the collaborative communication device to receive the data from the source node, the second message including identification information of the cooperative communication device.
The device according to claim 14, wherein the sending module is further configured to: before the receiving module receives the second message sent by the management node, send a measurement signal, where the measurement signal is used in the measurement When the measured quantity of the signal is greater than the threshold, the target node receives the second message sent by the management node.
The device according to claim 13, wherein the receiving module is further configured to receive a collaboration request sent by the target node, where the cooperation request is used to request the cooperative communication device to receive the source node to send to The data of the target node, the collaboration request includes identifier information of the target node and configuration information of the target node;

The sending module is further configured to send a collaboration response to the target node, where the collaboration response includes indication information, where the indication information is used to instruct the cooperative communication device to accept a collaboration request of the target node.