CN107005887A - Collaboration communication method and device - Google Patents

Abstract

Embodiments of the present invention provide a cooperative communication method and device. The cooperative communication method of the present invention includes: the target node receives the first message sent by the cooperative node, requests the cooperative node to send data according to the first message, and receives the data sent by the cooperative node , so that when the target node fails to receive the data sent by the source node, the data is received through the cooperating node without the assistance of the relay node to forward the data. Therefore, the solution is simple to implement and the cost is low.

Description

Cooperative communication method and device technical field

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

Background technique

At present, the user's demand for the service rate and service types of data services is increasing continuously. The emergence of wireless communication technologies such as third-generation mobile communication technology and Long Term Evolution (LTE for short) has increased the uplink and downlink rate of data services. However, , sending and receiving data services need to be implemented within the wireless coverage area, therefore, it is necessary to improve the wireless coverage area and improve the wireless transmission efficiency.

Taking LTE as an example, in LTE protocol version 10, in order to expand the base station coverage or increase the coverage of hotspots under the base station, a relay system is introduced. The relay system includes two nodes, a base station and a relay node. The base station is connected to the relay node through the wireless interface Un, and the relay node is connected to the user equipment (User Equipment, UE for short) through the wireless interface Uu. In the downlink direction, the base station first sends the 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 it to the base station.

However, since the relay node is functionally equivalent to a base station, the UE needs to reside in the cell under the relay node first, establish a connection with the relay node, and then obtain the base station to provide services for the UE. Complicated and expensive. Moreover, whenever the UE changes the relay node or the UE leaves the relay node to enter the coverage of the base station, the base station needs to be notified through the handover process. Therefore, the scheme of assisting forwarding of uplink and downlink data services through the relay node is more complicated.

Contents of the invention

Embodiments of the present invention provide a cooperative communication method and device to solve the problem that in the prior art, whenever the UE changes the relay node or the UE leaves the relay node to enter the coverage of the base station, the base station needs to be notified through the handover process, resulting in the relay node pairing The scheme of assisted forwarding for uplink and downlink data services is a complicated issue.

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

The target node receives the first message sent by the coordination node, and the first message indicates that the coordination node The point receives the data sent by the source node to the target node;

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

The target node receives the data sent by the coordination 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 coordination node, it further includes:

The target node receives a second message sent by the management node, the second message is used to notify the target node that the data is received from the source node through the coordinating node, and the second message includes the coordinating node. Identification information of the node.

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

The target node obtains the identification information of the coordination node;

The target node determines whether the measurement quantity of the measurement signal sent by the coordination node is greater than a threshold value according to the identification information of the coordination node;

The target node receiving the second message sent by the management node includes:

When the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value, the target node receives the second message sent by the management node.

According to the first aspect, in a third possible implementation manner, it also includes:

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

The target node receives the cooperation response sent by the coordination node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the target node.

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

If the coordinating node receives the data sent by the source node to the target node, the coordinating node sends a first message to the target node, and the first message indicates that the coordinating node has received the data sent by the source node to the target node said data;

receiving, by the coordinating node, a request sent by the target node according to the first message, where the request is used to request the coordinating node to send the data to the target node;

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

In the first possible implementation manner of the second aspect, the coordinating node receives the source node Before the data sent to the target node, also include:

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

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

The coordination node sends a measurement signal, and the measurement signal is used for the target node to receive the second message sent by the management node when the measurement amount of the measurement signal is greater than a threshold value.

According to the second aspect, in a third possible implementation manner, it also includes:

The coordinating node receives a cooperation request sent by the target node, the coordinating request is used to request the coordinating node to receive the data sent by the source node to the target node, and the coordinating request includes The identification information of the target node and the configuration information of the target node;

The coordination node sends a cooperation response to the target node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the target node.

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

A receiving module, configured to receive a first message sent by the coordinating node, the first message indicating that the coordinating node has received the data sent by the source node to the coordinating communication device;

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

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

In a first possible implementation manner of the third aspect, the receiving module is further configured to receive a second message sent by the management node before receiving the first message sent by the coordination node, and the second message is used for Notifying the coordinated communication device that the data is received from the source node through the coordinated node, and the second message includes identification information of the coordinated node.

According to the first possible implementation manner of the third aspect, in the second possible implementation manner, the processing module is further configured to obtain the cooperation information before the receiving module receives the second message sent by the management node Identification information of the node; according to the identification information of the coordination node, determine whether the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value;

The receiving module is specifically configured to receive the second message sent by the management node when the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value.

According to the third aspect, in a third possible implementation manner, it also includes:

a sending module, configured to send a cooperation request to the coordination node, where the cooperation request is used to request the coordination node to receive the data sent from the source node to the coordination communication device, the cooperation request including the cooperation Identification information of the communication device and configuration information of the cooperative communication device;

The receiving module is further configured to receive a cooperation response sent by the coordination node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the coordination communication device.

In a fourth aspect, an embodiment of the present invention provides a cooperative communication device, 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, the first message instructing the coordinating node to receive the data sent by the source node 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 receive a second message sent by the management node before receiving the data sent by the source node to the target node, and the second message uses In order to notify the coordinated communication device to receive the data from the source node, the second message includes identification information of the coordinated communication device.

According to the first possible implementation 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 used for the target node to receive the second message sent by the management node when the measurement amount of the measurement signal is greater than a threshold value.

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

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

The cooperative communication method and device in the embodiment of the present invention, after receiving the first message sent by the cooperative node, the target node requests the cooperative node to send the received message from the source node according to the first message. Send the data to the target node and receive the data sent by the coordinating node, so that if the target node fails to receive the data sent by the source node, the target node can request the coordinating node to send the source node received by the coordinating node according to the first message The node sends data to the target node without the assistance of the relay node to forward the data. Therefore, the implementation of the scheme is simple and the cost is low.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

FIG. 2A is a system architecture diagram of a cooperative communication method provided by an embodiment of the present invention;

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

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

FIG. 4 is a signaling flowchart of another cooperative communication method provided by an embodiment of the present invention;

FIG. 5 is a signaling flowchart of another cooperative communication method provided by an embodiment of the present invention;

FIG. 6 is a signaling flowchart of another cooperative communication method provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a cooperative communication device provided by an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of another cooperative communication device provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In order to introduce the embodiment of the present invention more conveniently, here we first focus on the existing technology through the relay system The system expands the coverage of the base station or increases the coverage of hotspots under the base station. Figure 1 is a system architecture diagram of extending base station coverage or increasing hotspot coverage under a base station through a relay system in the prior art. A relay system is formed, and the relay system includes two nodes, a base station 101 and a relay node 102 . A base station 101 is connected to a relay node 102 through a wireless interface Un, and the relay node 102 is connected to a user equipment (User Equipment, UE for short) 103 through a wireless interface Uu. In the downlink direction, the base station 101 first sends the data to the relay node 102, and then the relay node 102 forwards the data to the user equipment 103, and 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.

However, since the relay node is functionally equivalent to a base station, the UE needs to reside in the cell under the relay node first, establish a connection with the relay node, and then obtain the base station to provide services for the UE. Complicated and expensive. Moreover, whenever the UE changes the relay node or the UE leaves the relay node to enter the coverage of the base station, the base station needs to be notified through the handover process. Therefore, the scheme of assisting forwarding of uplink and downlink data services through the relay node is more complicated.

FIG. 2A is a system architecture diagram of a cooperative communication method provided by an embodiment of the present invention, and FIG. 2B is a flowchart of a cooperative communication method based on FIG. 2A provided by an embodiment of the present invention. In FIG. 2A , when the source node 203 sends data to the target node 202 , the target node fails to receive the data and the coordinating node 201 successfully receives the data as an example for introduction. The method of this embodiment is applicable to the case where a source node sends data to a target node in a wireless communication system, and if the target node fails to receive the data, the data can be sent to the target node through a coordinating node. The method of the present embodiment comprises the steps:

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

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

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

The source node sends data to a target node. If the target node fails to receive the data, and the coordinating node used to cooperate with the target node to receive the data receives the data, the coordinating node will send the first message to the source node. If the target node After receiving the first message, the target node may request the coordinating node to send the 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 coordinating node in response to the request.

It should be noted that the source node, the target node and the coordination node may be user equipment, micro station, Wireless communication equipment such as a base station or a wireless fidelity (WiFi) access node. When the source node, the target node and the coordination node are all user equipments, for example, it can be used in a D2D (device to device) communication system, and the three can be controlled by at least one management node (for example, a base station, a micro station or a Wi-Fi access point) for service. When the source node, target node, and cooperative node are all base stations, micro-stations, or Wi-Fi access points, access between base stations, between base stations and micro-stations, between micro-stations and micro-stations, and between base stations and Wi-Fi access points Between the points, between the micro station and the Wi-Fi access point or Wi-Fi can transmit various information according to the transmission method stipulated in the 3rd Generation Partnership Project (3GPP) agreement.

In the cooperative communication method provided in this embodiment, the target node receives the first message sent by the coordinating node and then requests the coordinating node to send the data received by the coordinating node from the source node to the target node according to the first message and receives the data sent by the coordinating node Data, so that when the target node fails to receive the data sent by the source node, the target node can request the coordinating node to send the data received by the coordinating node to the target node according to the first message, without the assistance of the relay node for forwarding data, therefore, the scheme is simple to implement and the cost is low.

Fig. 3 is a flowchart of another cooperative communication method provided by an embodiment of the present invention. The method of this embodiment is applicable to the case where a source node sends data to a target node in a wireless communication system, and if the target node fails to receive the data, the data can be sent to the target node through a coordinating node. The scheme provided in this embodiment is used in conjunction with the embodiment shown in Figure 2B, and the method in this embodiment includes the following steps:

S310. If the coordinating node successfully receives the data sent by the source node to the target node, the coordinating node sends a first message to the target node, the first message instructing the coordinating node to receive the data sent by the source node to the target node The data.

The source node sends data to a certain target node. If the target node fails to receive the data but the coordinating node of the target node successfully receives the data, the coordinating node will send a first message to the source node.

S320. The coordinating node receives the 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 coordinating node to send the data received by the coordinating node from the source node to the target node.

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

The coordinating node sends data to the target node in response to the target node's request.

In the cooperative communication method provided in this embodiment, if the cooperative node successfully receives the data to the target node, the coordinating node sends the first message to the source node, and the coordinating node receives the request sent by the target node according to the first message and responds to the request to send data to the target node, so that the target node fails to receive the source node In the case of sending data, the coordinating 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, without the assistance of the relay node to forward the data. Therefore, the implementation of the solution is simple and the cost is low.

In order to introduce the method embodiments shown in FIG. 2B and FIG. 3 in detail, an overall flow of the cooperative communication method is introduced here in conjunction with FIG. 4 . Fig. 4 is a signaling flowchart of another cooperative communication method provided by an embodiment of the present invention. In this embodiment, the source node and the management node are taken as the base station as an example. If the user equipment 2 is used as the target node, the user equipment 1 may have multiple cooperative nodes, and the user equipment 2 may have multiple cooperative nodes. In this implementation, only the user equipment 1 is used as the user The coordinating node of device 2 makes an exemplary introduction. Referring to Fig. 4, the method of the present embodiment may include the following steps:

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

The user equipment 2 performs a collaborative node search process. For example, the user equipment 2 can obtain the identification information of the user equipment 1 in various ways. The identification information of the user equipment 1 or the identification information of the user equipment 1 is obtained through the discovery function.

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

It should be noted that the number of user equipment 1 can be one or more. For example, if user equipment 2 respectively obtains the identification information of two user equipment 1 through the neighbor cell discovery function, user equipment 2 can receive any one of them. For the measurement signal sent by user equipment 1, user equipment 2 may judge whether user equipment 2 receives the second message sent by the base station according to whether the measured values of the two received measurement signals sent by user equipment 1 are greater than a threshold. Wherein, the measurement quantity of the measurement signal may be, for example, the measurement signal strength, the signal-to-noise ratio of the measurement signal, and the Channel Quality Indication (CQI) of the measurement signal. If it is determined that the measurement quantity of the measurement signal sent by the received user equipment 1 is greater than threshold value, the user equipment 2 can receive the second message sent by the base station. The threshold value is determined according to the required signal quality between two user equipments.

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

The second message is used to notify user equipment 2 to receive data from the base station through user equipment 1, and the second The message contains identification information of the user equipment 1 . The identification information of the user equipment 1 is, for example, the cell radio network temporary identifier (Cell Radio Network Temporary Identifier, referred to as C-RNTI) of the user equipment in LTE, and if it is a Wi-Fi system, it is the media access control (Media Access Control) of the user equipment , referred to as MAC) address.

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

The base station determines whether to notify user equipment 2 to receive data from the base station through user equipment 1 according to an internal algorithm. For example, the base station configures a node with better channel measurement with user equipment 2 as a cooperative node. The nodes close to the device 2 are configured as coordinating nodes, and the base station may also limit the number of coordinating nodes to reduce the receiving load of the coordinating nodes.

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

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

Through S401-S404, the configuration process of the cooperating node is completed. It should be noted that the coordinating node configuration scheme in S401-S404 is centralized. After that, if the base station sends data to user equipment 2, but user equipment 2 fails to receive However, user equipment 1 has received the data, then user equipment 2 can request user equipment 1 to send to itself the data sent by the base station to user equipment 2, so that user equipment 1 can send the data to user equipment 2. For details, please refer to Refer to S405-S408.

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

If the user equipment 2 has not received the data sent by the base station, but the user equipment 1 has received the data sent by the base station to the user equipment 2, perform S406.

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

When any node successfully receives the data, it judges that the target node is itself according to the identification information of the target node contained in the data, and can send a first message to the base station on the feedback channel. The first message can be an indication of successful reception, such as confirmation ( Acknowledgment, referred to as ACK) message, this process ends. If it is judged that the target node is not itself according to the identification information of the target node contained in the data, Then the received data can be sent to the target node in the subsequent process.

It should be noted that when multiple user equipments or multiple receiving nodes successfully receive the same indication of successful reception, the first messages will be superimposed on each other. Forming interference, the base station may receive the first message and consider that the data transmission is successful. For example, if the base station receives the first message sent by user equipment 1, the base station believes that user equipment 1 has received the data sent by the base station to 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 the data, but according to the addressing information of the data sent in S406, the target node is itself, then the user equipment 2 monitors the indication channel (such as the ACK feedback channel in LTE), if the first message, it indicates that at least one node has 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 monitoring the indication channel, and the indication information is used to indicate that at least one coordination node has successfully received the data sent by the base station to the equipment 2 . In this embodiment, if user equipment 2 listens to the first message sent by user equipment 1, then user equipment 2 determines that user equipment 1 has successfully received the data sent by the base station to user equipment 2, and user equipment 2 may request user equipment 1 to send the data to to user device 2.

Specifically, when user equipment 2 requests user equipment 1, it will configure the time-frequency resources, channels, and modulation and coding methods required for user equipment 1 to send data to user equipment 2. Data is sent to the user equipment 2 in a modulation and coding manner.

Since the coordinating 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, specifically through data addressing information, data receiving time, or hybrid automatic repeat The transmission request (Hybrid Automatic Repeat reQuest, referred to as HARQ) process number, etc. to determine the specific data, wherein, the time of data reception can be, for example, the system frame number (System Frame Number, referred to as SFN), the transmission time interval (Transmission Time Interval, referred to as TTI).

It should be noted that, in order to avoid caching too much data, if the target node does not request data transmission within the set time, the corresponding cached data can 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 above S401-S404 show a process of configuring a cooperative node. In the embodiment of the present invention, the configuration of the cooperative node can also be implemented in other ways, and the cooperative node can be configured in a distributed manner. Specifically, it can be implemented in the following manner:

User equipment 2 sends a cooperation request to user equipment 1. The cooperation request is used to request user equipment 1 to receive data sent by the base station to user equipment 2. The cooperation request includes at least identification information of user equipment 2 and configuration information of user equipment 2; user equipment 2 The cooperation response message sent by the user equipment 1 is received, the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the request of the target node. Among them, the configuration information of the user equipment 2 includes information such as wireless technology, wireless resources, and modulation and coding methods for inter-device 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 communicating between nodes through wifi or bluetooth technology, the base station does not need to manage it.

Among them, the cooperation request can also carry the information of the base station to which the user equipment 2 belongs, such as the common channel information of the base station, the time division duplexing (Time Division Duplexing, TDD for short) configuration of the base station, and the discontinuous reception (Discontinuous Reception, short for TDD) configuration of the user equipment 2. DRX) configuration, control channel information, data channel information, feedback channel information, etc., may also instruct user equipment 1 to obtain the base station information of user equipment 2 from the base station to which user equipment 2 belongs, so that user equipment 1 receives the base station sent to user equipment 2. data.

After user equipment 1 receives the cooperation request, it 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, it can participate in cooperation, if user equipment 1 is performing large data volume During communication, the cooperation can be refused) to determine whether to cooperate with the user equipment 2 to receive data. These judgments can be made according to the strategy of the user equipment 1 or the strategy of the base station, which is an implementation issue and will not be described in detail here. After user equipment 1 decides to cooperate with user equipment 2, it sends a cooperation response to user equipment 2. The user equipment 2 may send cooperation requests to multiple user equipments at the same time to request cooperation, but the number should not be too large, otherwise it will cause too much overhead for participating cooperation nodes.

The configuration information of the user equipment is used to configure information such as wireless technology, wireless resources, and modulation and coding methods for transmission between user equipments. For example, when D2D transmission is used, resource (or resource pool) information or D2D identification information during D2D transmission can be configured. If wifi or bluetooth technology communicates between nodes, the configuration information of the corresponding wireless technology is transmitted for subsequent data transmission between nodes.

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

In the cooperative communication method provided in this embodiment, the target node fails to receive the When the data is sent by the source node, the cooperative node that successfully receives the data sent by the source node sends the data to the target node without the assistance of the relay node to forward the data. Therefore, the implementation of the scheme is simple and the cost is low. Moreover, on the basis of successfully receiving data by the coordinating node, data is transmitted through the coordinating node, which avoids transmission between the source node and the target node, saves air interface resources, and improves resource utilization efficiency.

This embodiment takes the LTE system as an example, and introduces S405-S408 in the embodiment shown in FIG. 4 in detail.

In S405: the data sent by the base station to the user equipment 2 includes control information and service data, the control information is transmitted through the Physical Downlink Control Channel (PDCCH for short), and the service data is transmitted through the Physical Downlink Shared Channel (Physical Downlink Shared Channel, short for short) PDSCH) transmission, the control information indicates the time-frequency information of the data, transmission mode information, modulation and coding information, etc. The user equipment 2 uses its corresponding C-RNTI to blindly detect the control information sent to it by the base station in the search space corresponding to the PDCCH. The user equipment 1 judges whether to buffer the data sent by the base station to the user equipment 2 by blindly detecting the control information sent by the base station to the user equipment 2 . Blind detection of control information may bring the overhead of computing resources. User equipment 1 can blindly detect the control information sent to itself by the base station and blindly detect the control information of user equipment 2 at the same time, so that user equipment 1 will not Interrupts its own transmission. It can be understood that user equipment 1 may blindly detect the control information sent to itself by the base station first, and if the blind detection is successful, it will no longer blindly detect the control information sent by the base station to other nodes (such as user equipment 2). Or when the user equipment 1 determines that it has no business, or when the discontinuous reception is turned off (DRX off) state, 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 only uses the idle computing resources of the user equipment 1 .

In this embodiment, for example, the base station sends control information to the user equipment 2 through the PDCCH in subframe n. User equipment 1 and user equipment 2 simultaneously monitor and blindly detect the control information sent by the base station through the PDCCH in this subframe. It is assumed that user equipment 1 and user equipment 2 are capable of monitoring the control information sent by the base station to all nodes at the same time, that is, in this example Both user equipment 1 and user equipment 2 will blindly detect the C-RNTI at the same time. In subframe n, user equipment 1 and user equipment 2 succeed in blind detection of control 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 sent by the base station through the PDSCH is for user equipment 2 . User equipment 1 and user equipment 2 receive and decode corresponding data according to the time-frequency information, transmission mode information, and modulation and coding information indicated in the control information. Wherein user equipment 1 successfully receives and correctly decodes the data, but user equipment 2 fails to receive, and user equipment Backup 1 caches the data, and also saves 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, and the user equipment 1 can also cache the control information corresponding to the data, or the HARQ process number information , which is used to determine which service data the subsequent user equipment 2 instructs to retransmit. In order to ensure that the buffer is not occupied too much, a timer can be set. When the timer expires, the buffer resource is cleared or the HARQ resource is reset, and only when the buffer resource is idle, the node participates in the above buffer process.

In another method, the number of C-RNTI blind detections can be reduced. The configuration node can uniformly assign a Group-Radio Network Temporary Identifier (G-RNTI) to a group of cooperative nodes, and the sending addressing information can be G-RNTI plus a target node identifier included in the control information. The management node may configure the G-RNTI to each node during the above-mentioned centralized configuration of the coordination nodes. Each node decodes the control information by blindly detecting the same G-RNTI. After successful decoding, it reads the node identifier in the content to confirm the specific target node.

In S406: User equipment 1 sends the first message to the base station as an ACK message, and user equipment 1 can feed back the ACK message through PUCCH. PUCCH has a mapping relationship with the resource index where PDCCH is located, that is, the corresponding PDCCH can be obtained through the downlink authorized PDCCH. The location of the PUCCH resource is such that the PUCCH and the PDCCH are separated by 4 subframes, so the subframe n+4 will correspond to the PDCCH/PDSCH of n.

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

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

If both user equipment 1 and user equipment 2 fail to receive successfully, then in subframe n+4 subframe, none of the nodes will feed back an ACK message, and the base station does not receive the ACK message, then it can be known that the service data has not been sent successfully. The base station will retransmit in subsequent subframes.

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

After the user equipment 2 monitors the ACK message, it sends the request message. In S308: the user equipment 2 may send the request message through the point-to-point transmission technology. The request message may contain the identification information of the user equipment 2, so that the receiver knows that the requester is the user equipment 2. The request may also carry indication information to instruct retransmission of the service data sent by the base station in S306, and may also indicate retransmission of service data at a certain moment by carrying the process number in the service data sent in subframe n, such as indication information TTI offset=8, if user equipment 2 sends a request message in the n+8th subframe, it wishes to retransmit the data in the nth subframe, and the indication message can be displayed and carried in the request message. Furthermore, the request message may also carry time-frequency information, transmission mode information, modulation and coding information, etc., which are used to instruct user equipment 1 to send service data to user equipment 2 when, in which wireless resource, with what transmission format and modulation and coding information .

In S408: user equipment 1 determines the service data to be transmitted in response to the request of user equipment 2, and after obtaining the service data from the cache, if time-frequency information, transmission mode information, and modulation and coding information are configured in the request of user equipment 2, then The transmission is performed according to the time-frequency information, transmission mode information, and modulation and coding information configured in the request message. If multiple coordinating nodes receive it, they will send the same message in the same format on the same resource in time without interfering with each other.

If the corresponding time-frequency information, transmission mode information, and modulation and coding information are not configured, the user equipment 1 configures resources for transmission according to the distributed resource scheduling method of the transmission technology. Obtained by preemption in the pool. If multiple coordinating nodes (user equipment) have received the request, then user equipment 2 may receive multiple retransmissions. After user equipment 2 successfully receives the request, the upper layer protocol can perform duplicate packet detection and discard duplicate packets. If the number of nodes is as small as only two nodes, it will not cause too many duplicate packets and avoid waste of resources.

The functional principles and technical effects of the cooperative communication method provided in this embodiment are similar to those of the embodiment shown in FIG. 4 , and will not be repeated here.

This embodiment takes a WiFi system as an example. The difference between this embodiment and the foregoing embodiment based on the LTE system is that the source node in this embodiment is a WiFi access point. Referring to FIG. 5 , FIG. 5 is a signaling flowchart of another cooperative communication method provided by 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 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, but 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 coordinating node successfully receives the data, it can send a first message, such as an ACK message, to the WiFi access point after the data is sent. If multiple cooperating nodes receive successfully, they will send ACK messages together at the same time. Since the sent ACK messages are the same, reception by the WiFi access point will not be affected. For example, in this embodiment, 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 can be filled with the MAC address of user equipment 2, or the MAC address of user equipment 1 .

If the user equipment 2 does not successfully receive the data sent by the WiFi access point to the user equipment 2, then monitor the ACK message, for example, if the cyclic redundancy check (Cyclical Redundancy Check, CRC) error after receiving the data, then monitor the ACK message. If the ACK message is detected, in this embodiment, the user equipment 2 has detected the ACK message sent by the user equipment 1, and the user equipment 2 may know that at least one node has successfully received the data that should be sent to it. Or the user equipment 2 may know that at least one node has successfully received the data that should be sent to it by monitoring the indication information. For example, if the indication information carries an identifier, it indicates that other nodes have successfully received the data sent by the WiFi access point to the user equipment 2 . The indication information may indicate which node successfully receives.

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 cached data. The request may explicitly or implicitly indicate which data packet is to be retransmitted, and which data packet may be requested to be retransmitted through the sending time of the data packet or the sequence number of the data packet. If the sending node address in the ACK message in S502 is filled with the MAC address of the user equipment 2, the user equipment 2 may send the request in a broadcast manner to all coordinating nodes. User equipment 2 should indicate in the message who is requesting retransmission, for example, carrying the MAC address of user equipment 2 as the sending address in the message. If the ACK message in S502 carries the MAC address of user equipment 1, user equipment 2 may send a request to user equipment 1 to request user equipment 1 to retransmit the cached data. The request may also carry characteristic information of the cached data requested to be retransmitted, such as the serial number of the data, or the ID number of the corresponding data, etc., to specify which cached data to retransmit. Or the request information implicitly requests the cooperating node information to retransmit the last or only cached data.

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

The functional principles and technical effects of the cooperative communication method provided in this embodiment are similar to those of the embodiment shown in FIG. 4 , and will not be repeated here.

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

The coordination node configuration process in this embodiment can refer to the centralized and distributed configuration process in the embodiment shown in Figure 4, but the difference from the centralized and distributed configuration process in the embodiment shown in Figure 4 is that this embodiment In is the source node (user equipment) to search for cooperative nodes, for example, the process of centralized configuration of cooperative nodes is as follows:

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

In this embodiment, the user equipment not only searches the micro-station 2, but also searches the micro-station 1 near 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 an air interface; the management node can also be a server, the server is connected to any base station through a cable, and the user equipment is sent to the connected base station wirelessly, and then forwarded by the base station to server. Wherein, the information of the micro-station 1 and the micro-station 2 is, for example, frequency point, bandwidth, uplink and downlink subframe configuration, physical cell identifier, cell identifier and other information.

After receiving the information of the micro-station 1 and the micro-station 2, the management node judges whether to configure cooperative nodes and which nodes to configure as cooperative nodes.

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

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

In this embodiment, when the user equipment sends data to the micro-station 2, the micro-station 1 can serve as a coordination 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 to act as a coordination node and to receive the data sent from 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 sends the second message to the micro-station 2 respectively, the second message is used to notify the micro-station 2 to receive data from the user equipment through the micro-station 1, and the second message includes the identification information of the micro-station 1.

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

Through S601-S603, the coordinating node configuration process is completed. It should be noted that the coordinating node configuration scheme in S601-S603 is centralized. data, but the micro-station 1 has received the data, then the micro-station 2 can send a request message to the micro-station 1, so that the micro-station 1 sends the data to the micro-station 2, please refer to S604-S607 for the detailed process.

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

If the micro-station 2 has not received the data sent by the user equipment, but the micro-station 1 has received the data sent by the user equipment to the micro-station 2, execute S604.

The micro station 2 schedules the user equipment to send data to the micro station 2. In the LTE standard, the scheduler, that is, the micro station 2, sends a received data packet authorization information (uplink authorization information) on the control channel (PDCCH), which includes the physical layer time-frequency information, transmission Mode information, modulation and coding information, etc., are used to instruct the user equipment how to send data (PUSCH). The user equipment sends data to the micro station 2 according to the uplink authorization information.

Since the scheduler 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 the data through blind detection, but directly receives the data according to the scheduling signaling. In the LTE FDD system, the PDCCH signaling for sending uplink grant information and its corresponding data part PUSCH are separated by 4 subframes. There are four methods for the coordinating 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 sends the uplink authorization information, like the user equipment, the micro station 1 monitors the uplink authorization information sent by the micro station 2 . This method is suitable for the micro-station 1 to be in the receiving state at this time, and if the micro-station 1 also has data or signaling to be sent at the corresponding time, the cooperation cannot be performed. Second, after the micro station 2 sends the uplink authorization information to the user equipment, and before the user equipment sends data, when the micro station 1 is in the receiving state, the micro station 2 sends the uplink authorization information to the micro station 1. The limitation of this method is that sending The timing of the uplink grant information cannot be later than the data sent by 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 cable, or various point-to-point transmission techniques. Another way is to send the uplink authorization information to all coordinating nodes before the micro station 2 sends the uplink authorization information to the user equipment. In this embodiment, the uplink authorization information is sent to the micro station 1. The information is sent to the micro-station 1 and the micro-station 2, and the uplink authorization information can be 0, which is used to instruct the micro-station 2 to schedule the information of the user equipment, which can carry the information The information displays or implicitly indicates that the micro-station 2 sends the scheduling information to the user equipment, and then the micro-station 1 prepares to receive the data sent by the user equipment to the micro-station 2 according to the instruction of the information 0. Among them, the general scheduling node can be connected to each cooperative node by wire, or it can be a large coverage base station connected to each cooperative node by wireless, or it can be a functional module, which can reside in any node and only needs to send information 0 to other nodes. Collaboration nodes are fine.

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

The user equipment sends data to the micro station 2 in n+4 subframes according to the uplink authorization information. Both Microstation 1 and Microstation 2 receive data. After micro-station 1 and micro-station 2 receive the data according to the uplink authorization information, they check the CRC to judge whether the data is received correctly. If it is correct, they need to feed back the first message on the corresponding feedback channel at the corresponding time n+8 subframes. The first message in the embodiment is an ACK message. If the micro station 2 receives it successfully, it will end after feeding back the ACK message according to the normal process. If micro station 2 fails to receive, then micro station 2 needs to know whether other nodes have successfully received (in this implementation, micro station 2 needs to know whether micro station 1 has successfully received). If micro-station 1 receives successfully, then micro-station 1 is feeding back ACK message, and micro-station 2 can obtain this information by monitoring the ACK message; since micro-station 2 may receive information of multiple nodes at the same time, it needs to feed back ACK information of other nodes at this moment , then micro-station 2 can no longer perform ACK monitoring at this moment, and micro-station 1 can access the technology through wired or multiple point-to-point transmission technologies. Without affecting other ACK transmissions of micro-station 2, micro-station 1 will successfully receive user The information indication of the device data is sent to the micro station 2.

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

The micro station 2 requests the micro station 1 to send the data sent by the user equipment to the micro station 2 to the micro station 2 .

S607. The micro-station 1 sends data to the micro-station 2 in response to the request of the micro-station 2.

The functional principles and technical effects of the cooperative communication method provided in this embodiment are similar to those of the embodiment shown in FIG. 4 , and will not be repeated here.

FIG. 7 is a schematic structural diagram of a cooperative communication device provided by an embodiment of the present invention. Cooperative communication device of this embodiment The method of this embodiment is applicable to the case where a source node sends data to a target node in a wireless communication system, and if the target node fails to receive the data, the data can be sent to the target node through the coordinating node. The cooperative communication device is usually implemented in hardware and/or software. The cooperative communication device includes the following modules: a receiving module 710 and a processing module 720 .

Wherein, the receiving module 710 is used to receive the first message sent by the coordinating node, and the first message indicates that the coordinating node has received the data sent by the source node to the coordinating communication device; the processing module 720 is used to The first message requests the coordinating node to send data; the receiving module 710 is also configured to receive the data sent by the coordinating node in response to the request.

The cooperative communication device provided in this embodiment requests the cooperative node to send the data received by the cooperative node from the source node to the cooperative communication device according to the first message after receiving the first message sent by the cooperative node, and receives the data sent by the cooperative node , so that when the target node fails to receive the data sent by the source node, the target node can request the coordinating node to send the data received by the coordinating node to the target node according to the first message, without the assistance of the relay node to forward the data , so the scheme is simple to implement and low in cost.

On the basis of the above-mentioned embodiment shown in FIG. 7 , further, the receiving module 710 is further configured to receive a second message sent by the management node before receiving the first message sent by the coordination node, and the second message is used to send a message to the cooperative communication The device notifies that data is received from the source node through the coordinating node, and the second message includes identification information of the coordinating node.

Further, the processing module 720 is also configured to obtain the identification information of the coordination node before the receiving module receives the second message sent by the management node; and determine whether the measurement amount of the measurement signal sent by the coordination node is greater than the threshold according to the identification information of the coordination node value;

Further, the receiving module 710 is specifically configured to receive the second message sent by the management node when the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value.

Further, it also includes:

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

The receiving module 710 is also configured to receive a cooperation response sent by the coordination node, the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the target node.

It should be noted that the receiving module 710 in the embodiment of the present invention may correspond to a receiver of the user equipment, and may also correspond to a transceiver of the user equipment. The sending module may correspond to the transmitter of the user equipment, and may also correspond to the transceiver of the user equipment. The processing module 720 may correspond to the processor of the user equipment, where the processor may be a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or complete the implementation of the embodiment of the present invention one or more integrated circuits. The user equipment may also include a memory, the memory is used to store instruction codes, and the processor calls the instruction codes in the memory to control the implementation of the present invention. The receiving module 710 and the sending module in the example perform the above operations.

Fig. 8 is a schematic structural diagram of another cooperative communication device provided by an embodiment of the present invention. The cooperative communication device of this embodiment is applicable to the case where a source node sends data to a target node in a wireless communication system, and if the target node fails to receive the data, the data can be sent to the target node through the cooperative node. The cooperative communication device is usually implemented in hardware and/or software. The cooperative communication device includes the following modules: a sending module 810 and a receiving module 820 .

Among them, the sending module 810 is used to send the first message to the target node if the data sent by the source node to the target node is received; the receiving module 820 is used to receive the request sent by the target node according to the first message; the sending module 810 is also used to Send data to the target node in response to the request.

In the cooperative communication device provided by 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, receives the request sent by the target node according to the first message, and responds to the request. Request to send data to the target node, so that when the target node fails to 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 responds to the request to send the data to the target node without relay Nodes assist in forwarding data, so the solution is simple to implement and low in cost.

Further, the receiving module 820 is also configured to receive the second message sent by the management node before receiving the data sent by the source node to the target node, the second message is used to notify the cooperative communication device to receive data from the source node, and the second message includes Identification information of the collaborating node.

Further, the sending module 810 is also configured to send a measurement signal before the receiving module receives the second message sent by the management node, and the measurement signal is used for the target node to receive the second message sent by the management node when the measurement amount of the measurement signal is greater than a threshold value. information.

Further, the receiving module 820 is also used to receive the cooperation request sent by the target node, the cooperation request is used to request the cooperative communication device to receive the data sent by the source node to the target node, and the cooperation request includes the identification information of the target node and the configuration information of the target node;

The sending module 820 is further configured to send a cooperation response to the target node, where the cooperation response includes indication information, and the indication information is used to instruct the cooperation node to accept the cooperation 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, or may correspond to the transceiver of the user equipment. The receiving module 820 may correspond to a receiver of the user equipment, and may also correspond to a transceiver of the user equipment. The user equipment may also include a memory, the memory is used to store instruction codes, and the processor invokes the instruction codes in the memory to control the The sending module 810 and the receiving module 820 in the above-mentioned operations.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (16)

A collaborative communication method, characterized in that it includes: The target node receives a first message sent by the coordinating node, where the first message indicates that the coordinating node has received the data sent by the source node to the target node; The target node requests the coordinating node to send the data according to the first message; The target node receives the data sent by the coordination node in response to the request. The method according to claim 1, wherein before the target node receives the first message sent by the coordination node, further comprising: The target node receives a second message sent by the management node, the second message is used to notify the target node that the data is received from the source node through the coordinating node, and the second message includes the coordinating node. 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: The target node obtains the identification information of the coordination node; The target node determines whether the measurement quantity of the measurement signal sent by the coordination node is greater than a threshold value according to the identification information of the coordination node; The target node receiving the second message sent by the management node includes: When the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value, the target node receives the second message sent by the management node. The method according to claim 1, further comprising: The target node sends a cooperation request to the coordination node, the cooperation request is used to request the coordination node to receive the data sent by the source node to the target node, and the cooperation request includes the data of the target node Identification information and configuration information of the target node; The target node receives the cooperation response sent by the coordination node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the request of the target node. A collaborative communication method, characterized in that it includes: If the coordinating node receives the data sent by the source node to the target node, the coordinating node sends a first message to the target node, and the first message indicates that the coordinating node receives the data sent by the source node to the target node. said data of the node; The coordinating node receives the request sent by the target node according to the first message, and the request The request is used to request the coordinating node to send the data to the target node; The coordinating node sends the data to the target node in response to the request. The method according to claim 5, wherein, before the coordinating node receives the data sent from the source node to the target node, further comprising: The coordinating node receives a second message sent by the management node, the second message is used to notify the coordinating node to receive the data from the source node, and the second message includes identification information of the coordinating node. The method according to claim 6, further comprising: before the coordination node receives the second message sent by the management node: The coordination node sends a measurement signal, and the measurement signal is used for the target node to receive the second message sent by the management node when the measurement amount of the measurement signal is greater than a threshold value. The method according to claim 5, further comprising: The coordinating node receives a cooperation request sent by the target node, the coordinating request is used to request the coordinating node to receive the data sent by the source node to the target node, and the coordinating request includes The identification information of the target node and the configuration information of the target node; The coordination node sends a cooperation response to the target node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the target node. A cooperative communication device, characterized in that it includes: A receiving module, configured to receive a first message sent by a coordinating node, where the first message indicates that the cooperating node has received the data sent by the source node to the coordinating communication device; a processing module, configured to request the coordinating node to send the data according to the first message; The receiving module is further configured to receive the data sent by the coordination node in response to the request. The device according to claim 9, wherein the receiving module is further configured to receive a second message sent by the management node before receiving the first message sent by the coordination node, and the second message is used to send The target node notifies that the data is received from the source node through the coordinating node, and the second message includes identification information of the coordinating node. The device according to claim 10, wherein the processing module is further configured to acquire the identification information of the coordination node before the receiving module receives the second message sent by the management node; according to the coordination node identification information, determine whether the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value; The receiving module is specifically configured to receive the second message sent by the management node when the measurement amount of the measurement signal sent by the coordination node is greater than a threshold value. The device according to claim 9, further comprising: A sending module, configured to send a cooperation request to the coordination node, the cooperation request is used to request the coordination node to receive the data sent from the source node to the target node, and the cooperation request includes the target node The identification information of the target node and the configuration information of the target node; The receiving module is further configured to receive a cooperation response sent by the coordination node, where the cooperation response includes indication information, and the indication information is used to instruct the coordination node to accept the cooperation request of the target node. A cooperative communication device, characterized in that it includes: 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, and the first message indicates that the coordinated communication device has received the data sent by the source node to the target said 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 coordinating 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 device according to claim 13, wherein the receiving module is further configured to receive a second message sent by the management node before receiving the data sent by the source node to the target node, and the second message is used for Notifying the coordinated communication device to receive the data from the source node, the second message including identification information of the coordinated communication device. The device according to claim 14, wherein the sending module is further configured to send a measurement signal before the receiving module receives the second message sent by the management node, and the measurement signal is used in the measurement The target node receives the second message sent by the management node when the measurement amount of the signal is greater than a threshold value. The device according to claim 13, wherein the receiving module is further configured to receive a cooperation request sent by the target node, and the cooperation request is used to request the cooperative communication device to receive the cooperation request sent by the source node to The data of the target node, the cooperation request includes identification information of the target node and configuration information of the target node; The sending module is further configured to send a cooperation response to the target node, where the cooperation response includes indication information, and the indication information is used to instruct the cooperative communication device to accept the cooperation request of the target node.