WO2023070629A1

WO2023070629A1 - Method and apparatus for data transmission between devices

Info

Publication number: WO2023070629A1
Application number: PCT/CN2021/127777
Authority: WO
Inventors: 于强; 邓猛; 张超
Original assignee: 华为技术有限公司
Priority date: 2021-10-30
Filing date: 2021-10-30
Publication date: 2023-05-04
Also published as: CN117480858A

Abstract

The present application relates to the technical field of communications, and provides a method and apparatus for data transmission between devices, which method and apparatus are used for reducing power consumption during data transmission between devices, and preventing resource waste. The method is applied to a device-to-device (D2D) network, which comprises a plurality of devices, wherein the plurality of devices comprise a first device, a second device, and a third device. The method comprises: when a first device cannot directly communicate with a second device, the first device determining a third device according to a first device information set, wherein the first device information set is used for indicating at least one forwarding device among the plurality of devices, which forwarding device can forward data for the first device, and the at least one forwarding device comprises the third device; and the first device sending target data to the third device, such that the third device forwards the target data to the second device.

Description

A data transmission method and device between devices

technical field

The present application relates to the technical field of communications, and in particular to a data transmission method and device between devices.

Background technique

Device-to-device (D2D) communication allows user equipment to use traditional cellular resources to directly send and receive data between user equipment, so that data transmission between user equipment can be realized without a base station. In a D2D network, all user equipments have the same status, and each user equipment can communicate through three communication modes: unicast, broadcast and multicast. However, limited by signal power, channel conditions, and signal transmission timing, there may be scenarios where direct communication between different user equipments cannot be performed.

In the prior art, two data communication methods between devices are provided. The first method is realized by using the AD Hoc On-Demand Distance Vector (AODV) routing protocol based on the multi-hop wireless ad hoc network, that is, when the source device needs to communicate with the destination device, the source device and the destination device First establish a route from the source device to the destination device through the AODV routing protocol, and then transmit data through the route. The second method is realized by using the forwarding of the central device, that is, to establish a D2D network including the central device (for example, the central device is a router or a base station), and the central device can communicate with all user equipments, thereby passing the central device Realize data forwarding between different user devices.

In the above-mentioned first method, when the source device needs to communicate with multiple destination devices, multiple routes need to be established, so that a large amount of resources are occupied during the route establishment process, and there is a problem of high power consumption. In the above-mentioned second method, the central device needs to be responsible for data forwarding between all user devices, so the power consumption is very large.

Contents of the invention

Embodiments of the present application provide a data transmission method and device between devices, which are used to reduce power consumption during data transmission between devices and avoid waste of resources.

In order to achieve the above object, the embodiments of the present application adopt the following technical solutions:

In the first aspect, a data transmission method between devices is provided, which is applied in a device-to-device D2D network including a plurality of devices, and the plurality of devices include a first device, a second device, and a third device, and the method includes: when When the first device cannot directly communicate with the second device, the first device determines the third device according to the first device information set, and the first device information set is used to indicate at least one of the multiple devices that can forward data for the first device The at least one forwarding device includes a third device; the first device sends the target data to the third device, so that the third device forwards the target data to the second device.

In the above technical solution, when the first device cannot directly communicate with the second device, the first device may select a device from at least one forwarding device indicated by the first device information set and capable of forwarding data for the first device for data forwarding. Forwarding, that is, each device can forward data through the corresponding forwarding device, so that the power consumption is low. In addition, the data transmission method provided by the present application does not need to establish a route during data transmission, nor does it need routing or forwarding by a base station, so that compared with the prior art, it can greatly reduce power consumption and avoid waste of resources.

In a possible implementation manner of the first aspect, each forwarding device in the at least one forwarding device can directly communicate with the multiple devices. In the above possible implementation manner, the data transmission between the first device and the second device can be completed through one forwarding, thereby improving data transmission efficiency and reducing power consumption.

In a possible implementation manner of the first aspect, the method further includes: the first device receives at least one indication information, the at least one indication information is in one-to-one correspondence with the at least one forwarding device, and the indication information of one forwarding device is used for Indicating that the forwarding device can directly communicate with the multiple devices; the first device determines a first device information set according to the at least one indication information and the device information of the at least one forwarding device. In the foregoing possible implementation manner, the first device can determine the first device information set, and the at least one forwarding device indicated by the first device information set can directly communicate with the multiple devices, so that the first device passes at least one forwarding device When a forwarding device forwards data, it improves data transmission efficiency and reduces power consumption.

In a possible implementation manner of the first aspect, the method further includes: when the at least one forwarding device includes multiple forwarding devices, the first device selects a third device from the multiple forwarding devices according to preset parameter information , the preset parameter information includes at least one of the following: power, signal-to-noise ratio. In the above possible implementation, it can ensure that the first device selects a forwarding device with sufficient power or a good signal-to-noise ratio from multiple forwarding devices to forward data, thereby ensuring successful data forwarding and avoiding noise during data forwarding interference.

In a possible implementation manner of the first aspect, whether the first device can directly communicate with the second device is determined according to the second device information set, and the second device information set is used to indicate that among the multiple devices that can communicate with the second device A device communicates directly with at least one direct communication device. In the foregoing possible implementation manners, a simple and effective manner for determining whether the first device can directly communicate with the second device is provided.

In a possible implementation manner of the first aspect, the method further includes: the first device receives at least one piece of detection information, and the at least one piece of detection information corresponds to the at least one direct communication device; The detection information and the device information of the at least one direct communication device determine a second device information set. In the above possible implementation manner, the first device can determine the second device information set, and the direct communication devices indicated by the second device information set can directly communicate with the first device, so that the first device can The information set determines whether the first device is capable of direct communication with the second device.

In a possible implementation manner of the first aspect, the method further includes: the first device determines whether the first device can directly communicate with the plurality of devices according to the second device information set and the third device information set, and the third device The information set is used to indicate device information of the plurality of devices. In the foregoing possible implementation manner, the first device can determine whether it can directly communicate with the multiple devices, so as to perform data transmission according to the determined result or notify other devices of the determined result.

In a possible implementation manner of the first aspect, after determining whether the first device can directly communicate with the plurality of devices, the method further includes: the first device sends first broadcast information, and the first broadcast information includes at least one of the following: Item: detection information, indication information; wherein, the indication information in the first broadcast information is used to indicate whether the first device can directly communicate with the plurality of devices. In the above possible implementation, the first device can broadcast whether the first device can directly communicate with the multiple devices through the first broadcast information, so that the device that can receive the first broadcast information can know whether it can communicate with the first device communication, or whether the first device can directly communicate with the plurality of devices.

In a possible implementation manner of the first aspect, before the first device communicates with the second device, the method further includes: the first device receives second broadcast information, and the second broadcast information is used to indicate the third device information set . Wherein, the D2D network further includes: a fourth device as a management device, and the third device information set is sent by the fourth device through the second broadcast information. In the above possible implementation manner, the fourth device, as a management device, can send the third device information set to other devices in the D2D network, so that other devices can determine all devices in the D2D network according to the third device information.

In a possible implementation manner of the first aspect, the D2D network includes at least one communication group, and any communication group in the at least one communication group includes at least three devices in the plurality of devices. In the above possible implementation manner, when two devices in a communication group cannot communicate directly, data transmission can be realized through the forwarding device, and power consumption during data transmission can be reduced and resource waste can be avoided.

In a possible implementation manner of the first aspect, if the target data is unicast data, the first device sends the target data to the third device, so that the third device forwards the target data to the second device, including: The first device sends the target data to the third device in unicast mode, so that the third device forwards the target data to the second device in the unicast mode. In the foregoing possible implementation manners, during unicast communication, power consumption during data transmission can be reduced and waste of resources can be avoided.

In a possible implementation manner of the first aspect, if the target data is broadcast data, the first device sends the target data to the third device, so that the third device forwards the target data to the second device, including: the first A device sends the target data to the third device in unicast mode, so that the third device forwards the target data to the second device in broadcast mode. In the foregoing possible implementation manners, during broadcast communication, power consumption during data transmission can be reduced and waste of resources can be avoided.

In a possible implementation manner of the first aspect, if the target data is multicast data, the first device sends the target data to the third device, so that the third device forwards the target data to the second device, including: The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in a multicast manner. In the foregoing possible implementation manners, during multicast communication, power consumption during data transmission can be reduced and waste of resources can be avoided.

In a possible implementation manner of the first aspect, the method further includes: when the first device can directly communicate with the second device, the first device sends the target data to the second device. In the above possible implementation manners, when the first device can directly communicate with the second device, the first device does not need to establish a route, nor does it need routing or base station forwarding, thereby greatly reducing power consumption and avoiding waste of resources.

In the second aspect, there is provided a data transmission device, which is characterized in that it is applied in a device-to-device D2D network including a plurality of devices, and the multiple devices include a first device, a second device, and a third device, and the device serves as the first A device, including: a processing unit, configured to determine a third device according to a first device information set when the first device cannot directly communicate with the second device, and the first device information set is used to indicate that among the plurality of devices, the third device can be At least one forwarding device for forwarding data by a device, the at least one forwarding device includes a third device; a sending unit configured to send target data to the third device, so that the third device forwards the target data to the second device.

In a possible implementation manner of the second aspect, each forwarding device in at least one forwarding device can directly communicate with the multiple devices.

In a possible implementation manner of the second aspect, the apparatus further includes a receiving unit; the receiving unit is configured to receive at least one indication information, the at least one indication information is in one-to-one correspondence with the at least one forwarding device, and a forwarding device's The indication information is used to indicate that the forwarding device can directly communicate with the multiple devices; the processing unit is further configured to determine the first device information set according to the at least one indication information and the device information of the at least one forwarding device.

In a possible implementation manner of the second aspect, the processing unit is further configured to: when the at least one forwarding device includes multiple forwarding devices, select a third device from the multiple forwarding devices according to preset parameter information, the The preset parameter information includes at least one of the following: battery power and signal-to-noise ratio.

In a possible implementation manner of the second aspect, whether the first device can directly communicate with the second device is determined according to the second device information set, and the second device information set is used to indicate that among the multiple devices that can communicate with the second device A device communicates directly with at least one direct communication device.

In a possible implementation manner of the second aspect, the apparatus further includes a receiving unit; the receiving unit is further configured to receive at least one piece of detection information, where the at least one piece of detection information is in one-to-one correspondence with the at least one direct communication device; a processing unit is further configured to determine a second device information set according to the at least one detection information and the device information of the at least one direct communication device.

In a possible implementation manner of the second aspect, the processing unit is further configured to: determine whether the first device can directly communicate with the plurality of devices according to the second device information set and the third device information set, and the third device information set Device information indicating the plurality of devices.

In a possible implementation manner of the second aspect, the sending unit is further configured to: send first broadcast information, where the first broadcast information includes at least one of the following: detection information, indication information; wherein, the The indication information is used to indicate whether the first device can directly communicate with the multiple devices.

In a possible implementation manner of the second aspect, the apparatus further includes a receiving unit; the receiving unit is further configured to receive second broadcast information, where the second broadcast information is used to indicate the third device information set.

In a possible implementation manner of the second aspect, the D2D network further includes: a fourth device serving as a management device, and the third device information set is sent by the fourth device through the second broadcast information.

In a possible implementation manner of the second aspect, the D2D network includes at least one communication group, and any communication group in the at least one communication group includes at least three devices in the plurality of devices.

In a possible implementation of the second aspect, if the target data is unicast data, the sending unit is further configured to: send the target data to the third device in unicast mode, so that the third device uses the unicast The target data is forwarded to the second device in a manner.

In a possible implementation of the second aspect, if the target data is broadcast data, the sending unit is further configured to: the first device sends the target data to the third device in unicast mode, so that the third device broadcasts the target data The target data is forwarded to the second device in a manner.

In a possible implementation of the second aspect, if the target data is multicast data, the sending unit is further configured to: the first device sends the target data to the third device in unicast mode, so that the third device The target data is forwarded to the second device in a multicast manner.

In a possible implementation manner of the second aspect, the sending unit is further configured to: when the first device can directly communicate with the second device, send the target data to the second device.

In a third aspect, a data transmission device is provided, the device includes: a processor and a memory, and instructions are stored in the memory, and when the processor executes the instructions, the device executes any one of the first aspect or the first aspect A method provided by a possible implementation.

In another aspect of the present application, a D2D network is provided. The D2D network includes multiple devices, and the multiple devices include one or more of the second aspect, any possible implementation of the second aspect, or the third aspect. The data transmission device provided by the aspect.

In another aspect of the present application, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions are run on a device, the device is made to perform the first aspect or any of the first aspects. The method provided by one possible implementation.

In another aspect of the present application, a computer program product is provided. The computer program product includes: a computer program (also referred to as code, or instruction), which, when the computer program is executed, causes the computer to perform the above-mentioned first aspect. Or the method provided by any possible implementation of the first aspect.

It can be understood that any data transmission device, D2D network, computer-readable storage medium or computer program product provided above is used to implement the corresponding method provided above, therefore, the beneficial effects that it can achieve can refer to The beneficial effects of the corresponding method provided above will not be repeated here.

Description of drawings

FIG. 1 is a schematic diagram of using the AODV routing protocol to realize communication between devices;

FIG. 2 is a schematic diagram of implementing inter-device communication by using forwarding of a central device;

FIG. 3 is a schematic structural diagram of a D2D network provided by an embodiment of the present application;

FIG. 4 is a schematic flowchart of a data transmission method between devices provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart of another data transmission method between devices provided in the embodiment of the present application;

FIG. 6 is a schematic diagram of a data transmission method between devices under unicast provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another data transmission method between devices under unicast provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of a data transmission method between devices under broadcast provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another data transmission method between devices under broadcasting provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a data transmission method between devices under multicast provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of another data transmission method between devices under multicast provided by the embodiment of the present application;

FIG. 12 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.

Detailed ways

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple . In addition, the embodiments of the present application use words such as "first" and "second" to distinguish the same or similar items with basically the same function and effect. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and their sequence is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

It should be noted that, in this application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "for example" is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

The technical solutions provided by the embodiments of the present application may be applied to a device to device (device to device, D2D) network, and the D2D network may also be called a D2D communication system. The D2D network may be a network established based on technologies such as cellular communication, wireless fidelity (WiFi) communication, bluetooth communication, and zigbee communication. The following describes the D2D network.

The D2D network may include multiple user equipments (user equipment, UE), and D2D communication may be performed between the multiple user equipments. D2D communication allows user equipments to directly communicate with each other without being forwarded by an access network device. The foregoing user equipment may also be called terminal equipment or electronic equipment. Wherein, the user equipment includes but is not limited to: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device (such as smart watch, smart bracelet, pedometer, etc.) devices, etc.), vehicle-mounted equipment (such as automobiles, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, industrial control (industrial control), smart home devices (such as refrigerators, TVs, air conditioners, electric meters, etc.), intelligent robots, workshop equipment, wireless terminals in self-driving, remote medical surgery Wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, flight Devices (e.g., intelligent robots, hot air balloons, drones, airplanes), etc.

In the D2D network, the status of the multiple user equipments is equal, and each of the multiple user equipments can communicate through three communication modes: unicast, broadcast and multicast. The unicast may refer to a communication manner in which one user equipment sends information to another user equipment. Broadcasting may refer to a communication method in which a user equipment simultaneously sends information to all devices in the network. Multicast may refer to a communication method in which one user equipment simultaneously sends information to some user equipments in the network (the part of user equipments includes at least three user equipments). These three communication methods are widely used in D2D networks.

In practical applications, due to the influence of factors such as signal power, channel conditions, and signal transmission timing, there may be scenarios where direct communication between different user equipments cannot be performed. For example, the first user equipment can only communicate directly with the second user equipment located within a certain communication distance, but cannot directly communicate with the third user equipment beyond the communication distance. Communication between the first user equipment and the third user equipment is implemented. In this scenario, the above three communication methods all need to be assisted by other user equipment for forwarding.

FIG. 1 shows a schematic diagram of implementing communication between devices in a wireless ad hoc network by using the AODV routing protocol, and the wireless ad hoc network may be a D2D network. The principle of using the AODV routing protocol to realize inter-device communication includes: when the source node needs a route to the destination node, the source node broadcasts a route request message RREQ to find the route to the destination node; the destination node will use unicast Reply to the source node with a routing response message RREP; when the source node receives the routing response message RREP, a route between the source node and the destination node is established, and data communication is performed through the route.

Specifically, when the source node needs to communicate with the destination node, if the current routing table does not contain an effective route to the destination node, the source node broadcasts RREQ packets to all neighbors to start a route discovery process to find a route to the destination node. Available routes to the destination node. When a node receives a RREQ packet, it establishes or updates the route to the previous hop, and adds one to the hop count in the RREQ packet; then, the node searches for a reverse route to the source node, and the intermediate node The RREQ can be used to establish or update a route in the reverse direction to transmit subsequent RREP packets. If a node receives the RREQ packet and the node is the destination node, the destination node generates a RREP packet, and sends the RREP packet to the source node in unicast mode according to the route specified by the source node routing table. The next hop node of the route.

Exemplarily, in FIG. 1, multiple user equipments in the network include 8 user equipments, which can be referred to as 8 nodes and are sequentially denoted as A to H, node A, node B, node C, node D. Node E and node F are on one path, and node A, node G, and node H are on another path as an example for illustration.

As shown in (a) in Figure 1, assuming that the source node is node A, the process of node A establishing a route is: node A broadcasts RREQ packets to node B and node G; when node B and node G receive the RREQ packet When node H receives the RREQ packet, it establishes a route to the previous hop (destination node A, next hop node A), and sends a RREQ packet to the subsequent node; when node H receives the RREQ packet, it establishes a route to the previous hop (destination node A) node A, next hop node G). Similarly, on the path from node A to node F, the process of establishing a route from node C to node F is consistent with the process of establishing a route from node B above, and the route established by node C is (destination node A, next hop node B), the route established by node D is (destination node A, next hop node C), the route established by node E is (destination node A, next hop node D), and the route established by node F is (destination node A, next hop node E). In the above process of establishing a route, each node can also establish a route in the reverse direction of RREQ packet transmission for transmitting subsequent RREP packets.

As shown in (b) in Figure 1, assuming that the destination node is node F, the forward route established by node A is (destination node F, next-hop node B), and the forward route established by node B is (destination node F , next hop node C), the forward route established by node C is (destination node F, next hop node D), the forward route established by node D is (destination node F, next hop node E), node E The established forward route is (destination node F, next hop node F). Then node F returns the RREP packet to source node A according to the above route.

In the above-mentioned method for realizing inter-device communication using the AODV routing protocol, when the source device needs to communicate with multiple destination devices, multiple routes need to be established, so that a large amount of resources need to be occupied in the process of establishing the route, and there is a problem of high power consumption. The problem. In addition, when the communication method is broadcast, the number of broadcast messages is exponentially normal during the forwarding process of one or more nodes, and a large number will be repeated, resulting in increased network load and waste of network bandwidth.

Fig. 2 shows a schematic diagram of realizing communication between devices in a central ad hoc network by using forwarding of a central device. The network includes a central device (for example, the central device is a router or a base station) and multiple user equipments. In the network, the central device acts as a management device and can communicate with all user devices, and the data transmission between user devices is forwarded by the central device, that is, there is only communication between the user device and the central device in the network , there is no direct communication between user devices. In FIG. 2 , the plurality of user equipments includes five user equipments, which are represented as member equipment 1 , member equipment 2 , member equipment 3 , member equipment 4 and member equipment 5 . However, in the method of implementing inter-device communication through forwarding by the central device, the central device needs to be responsible for resource allocation of all user equipments and data forwarding between user equipments, so the power consumption is very large.

Based on this, an embodiment of the present application provides a data transmission method applied to devices in a D2D network. The method does not need to establish a route during D2D communication, and can reduce power consumption of user equipment used for data forwarding in the network. Wherein, the D2D network may only include multiple user equipments, one of the multiple user equipments may serve as a management device, and other user equipments may serve as member devices, and each member device can directly communicate with the management device. Part of the member devices can directly communicate with each other, and some member user devices cannot directly communicate with each other. Optionally, the D2D network may include one or more communication groups, each communication group may include at least three user equipments among the plurality of user equipments, and the at least three user equipments include a group management device and at least two group member devices.

Exemplarily, as shown in FIG. 3 , the D2D network includes 5 user equipments, and the 5 user equipments include a management device, a member device 1 , a member device 2 , a member device 3 and a member device 4 . Wherein, the management device can directly communicate with any member device among the member device 1 to the member device 4 . In addition, centering on the management device, member devices (for example, member device 1 and member device 2) within a certain communication distance (for example, within an area with a radius of R) can directly communicate with each other. Member devices outside the range (for example, member device 3 and member device 4) cannot directly communicate with each other, and member devices within the range can directly communicate with member devices outside the range (referred to as Direct communication between member device 1 and member device 2 and member device 3 is taken as an example for description). In the embodiment of this application, each member device does not need to pay attention to the size of the communication distance, and can determine whether it can directly communicate with the corresponding device by receiving the heartbeat message sent by other member devices. The heartbeat message can be periodic sex sent.

Based on the D2D network, the data transmission method between devices provided by the embodiment of the present application will be described in detail below.

4 is a schematic flowchart of a data transmission method between devices provided by an embodiment of the present application. The method is applied in a D2D network including multiple devices. The multiple devices may also be called multiple user equipments. The multiple devices The device includes a first device, a second device and a third device, and the method includes the following steps.

S201: When the first device cannot directly communicate with the second device, the first device determines a third device according to the first device information set, and the first device information set is used to indicate among the multiple devices that can forward data for the first device At least one forwarding device.

Wherein, the first device and the second device are two member devices in the D2D network. For example, as shown in FIG. 3 , the first device may be member device 3 , and the second device may be member device 4 . The third device may be a management device or a member device in the D2D network.

In addition, the first device information set may include device information of the at least one forwarding device, for example, the device information may include one or more of information such as a device identifier, a device port, and a device address. The at least one forwarding device may include one or more forwarding devices, and the third device may be any one of the one or more forwarding devices. Optionally, each forwarding device in the at least one forwarding device can directly communicate with the multiple devices, and the third device is a device in the at least one forwarding device, so that the third device can communicate with the first device and the second device respectively. The devices communicate directly.

Furthermore, the fact that the first device cannot directly communicate with the second device can be understood as: there is no transmission link with a hop count of 1 between the first device and the second device, or one of the first device and the second device cannot The detection information sent by another device is received (for example, the detection information is a heartbeat message). Correspondingly, the fact that the first device can directly communicate with the second device can be understood as: there is a transmission link with a hop count of 1 between the first device and the second device, or one of the first device and the second device can receive Detection information sent to another device (for example, the detection information is a heartbeat message). The foregoing multiple descriptions about two devices capable of direct communication may be replaced with each other, and multiple descriptions about two devices that cannot directly communicate with each other may also be replaced with each other.

In a possible embodiment, when the at least one forwarding device includes multiple forwarding devices, the first device may arbitrarily select a forwarding device from the multiple forwarding devices as the third device, or the first device Select a forwarding device from the multiple forwarding devices as the third device.

Optionally, when the at least one forwarding device includes multiple forwarding devices, the first device selects the third device from the multiple forwarding devices according to preset parameter information, where the preset parameter information may include battery power, signal-to-noise ratio, or One or more of parameters such as signal power. For example, the first device may select the device with the best preset parameter information from the multiple forwarding devices as the third device; or, the first device follows the order of the preset parameter information from high to low or from low to high Perform priority sorting on the plurality of forwarding devices, and select the device with the highest priority from the sorting as the third device.

Further, the preset parameter information may be sent by the multiple forwarding devices to the first device. In an example, each of the multiple forwarding devices may broadcast its own preset parameter information, so that the first device acquires the preset parameter information of the multiple forwarding devices. Wherein, each forwarding device may broadcast the preset parameter information through a heartbeat message, or broadcast the preset parameter information through other messages than the heartbeat message. Each forwarding device may broadcast the preset parameter information periodically, or broadcast the preset parameter information when the change of the preset parameter information exceeds the corresponding preset threshold, so that the first device obtains the latest preset parameter information. Parameter information.

S202a: The first device sends the target data to the third device. S202b: When the third device receives the target data, the third device forwards the target data to the second device.

Specifically, when the first device determines the third device, the first device may send target data to the third device, and the target device of the target data is the second device. The target data can be used to indicate that the second device is the target device. For example, the target address in the target data is the address of the second device. When the third device receives the target data, the third device can send the target device to the second device. Data, so that the second device receives the target data, that is, the data transmission between the first device and the second device is realized through forwarding by the third device.

In the first possible embodiment, if the target data is unicast data, the process of realizing the data transmission between the first device and the second device through forwarding by the third device includes: The target data is sent to the third device; when the third device receives the target data, the third device forwards the target data to the second device in a unicast manner, so that the second device receives the target data. Exemplarily, taking the D2D network shown in FIG. 3 as an example,

In the second possible embodiment, if the target data is broadcast data, the process of realizing the data transmission between the first device and the second device through forwarding by the third device includes: The third device sends the target data; when the third device receives the target data, the third device forwards the target data to the second device in a broadcast manner, so that the second device receives the target data. Wherein, when some of the devices receiving the broadcast data can directly communicate with the first device, and other devices cannot directly communicate with the first device, the third device sends the target data to all devices receiving the broadcast data by broadcasting .

In a third possible embodiment, if the target data is multicast data, the process of realizing the data transmission between the first device and the second device through forwarding by the third device includes: the first device transmits data in unicast mode The target data is sent to the third device; when the third device receives the target data, the third device forwards the target data to the second device in a multicast manner, so that the second device receives the target data. Wherein, when some of the devices receiving the multicast data can directly communicate with the first device, and other devices cannot directly communicate with the first device, the third device sends the multicast message to all devices receiving the broadcast data. target data.

Optionally, when the first device can directly communicate with the second device, the first device may directly send the target data to the second device. Specifically, if the target data is unicast data, the first device sends the target data to the second device in unicast mode; if the target data is broadcast data, the first device sends the target data to the second device in broadcast mode ; If the target data is multicast data, the first device sends the target data to the second device in a multicast manner.

Further, before S201, the first device may first determine the first device information set. Specifically, as shown in FIG. 5, before S201, the method further includes S203-S204.

S203: The first device receives at least one indication information, the at least one indication information corresponds to the at least one forwarding device one by one, and the indication information of one forwarding device is used to indicate that the forwarding device can directly communicate with the multiple devices.

Wherein, one indication information corresponds to one forwarding device may mean that the indication information is sent by the forwarding device, so that the at least one indication information corresponds to the at least one forwarding device one-to-one. It can be understood that each indication information in the at least one indication information The indication information is sent by a forwarding device in the at least one forwarding device.

Optionally, the indication information may be 1 bit (bit), and the 1 bit may be used to indicate whether the forwarding device sending the indication information can directly communicate with the multiple devices. For example, when the value of the 1 bit is 1, it can be used to indicate that the forwarding device sending the indication information can directly communicate with the multiple devices; when the value of the 1 bit is 0, it can be used to indicate that the forwarding device sending the indication information The forwarding device cannot communicate directly with the multiple devices.

Specifically, each of the multiple devices may broadcast indication information, the first device may monitor the indication information sent by the multiple devices, and when the first device monitors the indication information sent by the at least one forwarding device, the first The device may receive the at least one indication information. By parsing the at least one indication information, the first device determines that the at least one indication information is used to indicate that the corresponding forwarding device can directly communicate with the multiple devices.

S204: The first device determines a first device information set according to the at least one indication information and the device information of the at least one forwarding device.

Specifically, when the first device receives the at least one indication information, the first device may determine the at least one forwarding device according to the correspondence between the at least one indication information and the at least one forwarding device; the at least one indication information uses In order to indicate that the corresponding forwarding device can directly communicate with the multiple devices, so that the first device determines that the at least one forwarding device can directly communicate with the multiple devices; the first device; according to the device information of the at least one forwarding device, determine The first device information set, for example, the first device information set may include the device identifier of the at least one forwarding device.

Further, before S201, the first device may also determine whether the first device can directly communicate with the second device, wherein whether the first device can directly communicate with the second device may be determined according to the information set of the second device, and the second device may directly communicate with the second device. The device information set is used to indicate at least one direct communication device capable of direct communication with the first device among the plurality of devices. Specifically, as shown in FIG. 5, before S201, the method further includes S205-S206. Wherein, S205 and S203 may be in no particular order, and S206 and S204 may be in no particular order. In FIG. 5 , S205 and S203 are represented by a step S203+S205.

S205: The first device receives at least one piece of detection information, where the at least one piece of detection information is in one-to-one correspondence with the at least one direct communication device.

Where one piece of detection information corresponds to one forwarding device may mean that the detection information is sent by the forwarding device, so that the one-to-one correspondence between the at least one detection information and the at least one forwarding device can be understood as that each of the at least one detection information The pieces of detection information are sent by one forwarding device in the at least one forwarding device. Optionally, the detection information may be a heartbeat message.

Specifically, each of the multiple devices may broadcast a heartbeat message, and the first device may monitor the heartbeat message sent by the multiple devices, and if the first device can monitor the heartbeat message sent by the at least one direct communication device, it may also That is, the first device can receive the heartbeat message of the at least one direct communication device.

Optionally, each of the multiple devices may simultaneously send the indication information and the detection information through one signaling, so that the first device may simultaneously receive the indication information and the detection information in one signaling. For example, the detection information may be a heartbeat message, and the heartbeat message may include 1-bit indication information.

S206: The first device determines a second device information set according to the at least one detection information and the device information of the at least one direct communication device.

Specifically, when the first device receives the at least one detection information, the first device may determine the at least one direct communication device according to the correspondence between the at least one detection information and the at least one direct communication device; then, the first device According to the device information of the at least one direct communication device, a second device information set is determined, for example, the second device information set may include the device identifier of the at least one direct communication device.

Further, the first device may also determine whether the first device can directly communicate with the multiple devices according to the second device information set and the third device information set, where the third device information set is used to indicate device information of the multiple devices. For example, the second device information set is used to indicate the device identifier of the at least one direct communication device, and the third device information is used to indicate the device identifiers of the multiple devices, and the specific process includes: if the second device information set and the third device If the device identifiers indicated by the information all include device identifiers of all devices in the multiple devices except the first device, then the first device determines that the first device can directly communicate with the multiple devices.

After determining whether the first device can directly communicate with the multiple devices, the first device may also notify the multiple devices whether the first device can directly communicate with the multiple devices. Specifically, the first device sends first broadcast information, where the first broadcast information includes indication information, where the indication information is used to indicate whether the first device can directly communicate with the multiple devices, so as to notify the multiple devices through the indication information. Wherein, if it is determined that the first device can directly communicate with the multiple devices, the indication information in the first broadcast information is used to indicate that the first device can directly communicate with the multiple devices; if it is determined that the first device cannot directly communicate with the multiple devices If the devices communicate directly, the indication information in the first broadcast information is used to indicate that the first device cannot directly communicate with the multiple devices. Optionally, the first broadcast information may further include detection information, and the detection information may be a heartbeat message. That is, the first device may simultaneously send the detection information and the indication information through the first broadcast information.

Optionally, before determining whether the first device can directly communicate with the plurality of devices, the first device may first acquire the third device information set. Specifically, the D2D network also includes a fourth device as a management device, the fourth device can send the second broadcast information, and the second broadcast information is used to indicate the information set of the third device, so that when the first device receives the second broadcast information , the first device may determine the third device information set according to the fourth broadcast information.

In a possible embodiment, when a new member device joins in the D2D network, the fourth device may send the third device information set or the device information of the newly added member device to the member devices in the network by broadcasting. Or, when the devices in the D2D network change, for example, when a member device is offline or exits the network, the fourth device may send the third device information set or the device information of the changed device to the member devices through broadcast. Alternatively, the fourth device may periodically broadcast the third device information set to member devices in the network.

Wherein, the fourth device serves as a management device, and can acquire the device information of each of the multiple devices when the device joins the D2D network. For example, when any member device among the plurality of devices joins the D2D network, the member device may receive the synchronization signal sent by the management device, and perform synchronization discovery processing with the synchronization signal as the target, and after completing the discovery processing, Perform random access processing to join the D2D network, and the member device may send its own device information to the management device during the discovery processing or random access processing. It should be noted that, for specific descriptions about member devices joining the D2D network, reference may be made to descriptions in related technologies, which will not be elaborated in this embodiment of the present application.

Further, the D2D network may include at least one communication group, and any communication group in the at least one communication group may include at least three devices in the plurality of devices. The at least three devices include a group management device and at least two group member devices.

Wherein, the group management device in the communication group can determine the third group of device information set, the third group of device information set is used to indicate the device information of the at least three devices included in the communication group, and the group management device can also use multicast The method sends the group device information set to all group member devices. When a group member device in the communication group exits or a new group member device joins, etc., the group management device can update the group device information set. The specific update process is the same as the management device in the D2D network updating the third device information set. The process is similar, and will not be repeated in this embodiment of the present application. Optionally, the group management device may also send the group identifier of the communication group to all group member devices in a multicast manner.

In addition, each group member device in the communication group may send detection information through multicast, and listen to detection information sent by other group member devices, where the detection information may be a heartbeat message. When a group member device can receive detection information from another group member device, direct communication between the two group member devices can be performed. When a group member device cannot receive detection information from another group member device, the two group member devices cannot communicate directly. Each group member device may determine a second group device information set according to the received detection information, and the second group device information set is used to indicate that the group member device can directly communicate with devices in the communication group. Optionally, when the management device is not in a communication group, the second group of device information sets may further include device information of the management device.

In addition, each group member device in the communication group can also send indication information through multicast, and listen to the indication information sent by other group member devices. The indication information is used to indicate whether the group member device can communicate with the communication group. All devices communicate directly. Each group member device may determine a first group device information set according to the received indication information, where the first group device information set indicates that the group member device can directly communicate with devices in the communication group. Optionally, when the management device is not in the communication group, the first set of device information may also include the device information of the management device, that is, group member devices in the communication group may select the management device as the forwarding device. It should be noted that the relevant description of sending the indication information by the member devices in the communication group is similar to the description of the sending of the indication information by the first device in the D2D network. For details, refer to the relevant description above, and the embodiments of the present application will not repeat them here.

For ease of understanding, the specific processes of the data transmission method provided by the embodiment of the present application in the three communication modes of unicast, broadcast and multicast are illustrated below with reference to FIG. 3 . In the following example, the device information is the device identifier, the device identifier of the management device is ID0, and the device identifiers of member device 1 to member device 4 are ID1 to ID4 respectively.

The first, the communication method is unicast. Fig. 6 shows an example in which two member devices cannot directly communicate in unicast mode, and Fig. 7 shows an example in which two member devices can directly communicate in unicast mode. In FIG. 6 , assuming that member device 3 is the source device and member device 4 is the destination device, when member device 3 needs to send data to member device 4, member device 3 according to the obtained second device information set {ID0, ID1, ID2 } determine that direct communication with the member device 4 is not possible (that is, ID4 is not in the second device information set), the member device 3 selects the member device 2 identified by ID2 as the forwarding device according to the obtained first device information set {ID2, ID0, ID1}, And send the data to the member device 2 in a unicast manner, so that the member device 2 forwards the data to the member device 4 in a unicast manner. In FIG. 7 , assuming that member device 3 is the source device and member device 1 is the destination device, when member device 3 needs to send data to member device 1, member device 3 according to the obtained second device information set {ID0, ID1, ID2 } If it is determined that it can directly communicate with member device 1 (that is, ID1 is in the second device information set), then member device 3 sends data to member device 1 through unicast. The third device information set acquired by the member device 3 in FIG. 6 and FIG. 7 is {ID0, ID1, ID2, ID3, ID4}.

The second method of communication is broadcasting. Fig. 8 shows an example in which the source device cannot directly communicate with some devices in the broadcast mode, and Fig. 9 shows an example in which the source device can directly communicate with all devices in the network in the broadcast mode. In FIG. 8 , assuming that member device 3 is the source device, member device 3 determines the If it cannot directly communicate with the multiple devices, the member device 3 selects the member device 2 identified by ID2 as the forwarding device according to the first device information set {ID2, ID0, ID1} obtained by itself, and sends the data through unicast To the member device 2, so that the member device 2 sends the data to the management device, member device 1 and member device 4 by broadcasting. In FIG. 9 , assuming that member device 1 is the source device, member device 1 acquires the second device information set {ID0, ID2, ID3, ID4} and the third device information set {ID0, ID1, ID2, ID3, ID4. } If it is determined that it can directly communicate with the multiple devices, the member device 1 sends the data to the management device, and member devices 2 to 4 by broadcasting.

The third communication method is multicast. Assuming that a communication group includes member device 1, member device 3 and member device 4, Figure 10 shows an example where the source device cannot communicate directly with some devices in the communication group in multicast mode, and Figure 11 shows An example is shown in which the source device can directly communicate with all devices in the communication group in the multicast mode. In FIG. 10 , assuming that member device 3 is the source device, member device 3 determines that it cannot Direct communication with all devices in the communication group, member device 3 selects the management device identified by ID0 as the forwarding device according to the first group of device information {ID0, ID1} obtained by itself, and sends data to the management device through unicast device, so that the management device sends the data to member device 1 and member device 4 through multicast. In Figure 11, assuming that member device 1 is the source device, member device 1 determines the If it can directly communicate with all devices in the communication group, member device 1 sends the data to member device 3 and member device 4 through multicast.

In this embodiment of the application, for any communication mode among unicast, broadcast and multicast, when the first device and the second device can communicate directly, the first device can directly send the target data to the second device, when When the first device and the second device cannot communicate directly, the first device can select a device from at least one forwarding device capable of forwarding data for the first device to forward data, that is, each device can perform data forwarding through the corresponding forwarding device. Data forwarding, resulting in lower power consumption. In addition, the data transmission solution provided by the present application does not need to establish a route during data transmission, nor does it need routing or forwarding of a base station, so that compared with the prior art, power consumption can be greatly reduced.

The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between the first device, the second device and the third device. It can be understood that, in order to realize the above functions, the first device and the second device include execution The hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the first device into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above functional modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, FIG. 12 shows a possible structural diagram of the data transmission device involved in the above embodiment. The data transmission device can be used as the first device or built in the first device chip. The device includes: a processing unit 301 and a sending unit 302 . Wherein, the processing unit 301 is configured to support the device to execute S201 in the above method embodiment; the sending unit 302 is configured to support the device to execute S202a in the above method embodiment. Further, the processing unit 301 may also be configured to support the apparatus to execute one or more steps in S204 or S206 in the foregoing method embodiments. Optionally, the device may further include: a receiving unit 303, configured to support the device to execute S203 and/or S205 in the above method embodiments.

On the basis of hardware implementation, the processing unit 301 can be the processor of the data transmission device, the sending unit 302 can be the transmitter of the data transmission device, and the receiving unit 303 can be the receiver of the data transmission device, and the transmitter usually It can be integrated with the receiver as a transceiver, and the specific transceiver can also be called a communication interface or an interface circuit.

As shown in Figure 13, it is another possible structural diagram of the data transmission device involved in the above-mentioned embodiment provided by the embodiment of the present application. The device can be used as the first device or a built-in chip of the first device, and the device includes: The processor 311 may further include a memory 312 , a communication interface 313 and a bus 314 , and the processor 311 , the memory 312 and the communication interface 313 are connected through the bus 314 .

Wherein, the processor 311 is used for controlling and managing the actions of the device. In a possible embodiment, the processor 311 may be configured to support the device to execute one or more steps in S201, S204, or S206 in the foregoing method embodiments. The communication interface 313 is used to support the apparatus to communicate, for example, to support the apparatus to communicate with a third device or a fourth device.

In the embodiment of the present application, the processor 311 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or other random combination. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The bus 314 in FIG. 13 above may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in the above-mentioned FIG. 13 , but it does not mean that there is only one bus or one type of bus.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation or may be integrated into another device, or some features may be omitted, or not implemented.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be one physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places . Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

In yet another aspect of the present application, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions are run on a device, the device is made to perform the first device in the above-mentioned method embodiment. step.

In yet another aspect of the present application, a computer program product is provided. When the computer program product is run on a device, the device is made to execute the steps of the first device in the above method embodiments.

Finally, it should be noted that: the above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application shall be covered by this application. within the scope of the application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A data transmission method between devices, characterized in that it is applied to a device-to-device D2D network including a plurality of devices, the plurality of devices including a first device, a second device and a third device, the method comprising:

When the first device cannot directly communicate with the second device, the first device determines a third device according to a first device information set, and the first device information set is used to indicate that among the plurality of devices, the at least one forwarding device forwarding data for the first device, the at least one forwarding device including the third device;

The first device sends the target data to the third device, so that the third device forwards the target data to the second device.
The method of claim 1, wherein each forwarding device of the at least one forwarding device is capable of direct communication with the plurality of devices.
The method according to claim 1 or 2, characterized in that the method further comprises:

The first device receives at least one indication information, the at least one indication information corresponds to the at least one forwarding device one by one, and the indication information of one forwarding device is used to indicate that the forwarding device can directly communicate with the multiple devices ;

The first device determines the first device information set according to the at least one indication information and the device information of the at least one forwarding device.
The method according to any one of claims 1-3, wherein the method further comprises:

When the at least one forwarding device includes multiple forwarding devices, the first device selects the third device from the multiple forwarding devices according to preset parameter information, and the preset parameter information includes at least one of the following : power, signal-to-noise ratio.
The method according to any one of claims 1-4, wherein whether the first device can directly communicate with the second device is determined according to a second device information set, and the second device information set It is used to indicate at least one direct communication device capable of direct communication with the first device among the plurality of devices.
The method according to claim 5, wherein the method further comprises:

The first device receives at least one detection information, and the at least one detection information is in one-to-one correspondence with the at least one direct communication device;

The first device determines the second device information set according to the at least one detection information and the device information of the at least one direct communication device.
The method according to claim 5 or 6, wherein the method further comprises:

The first device determines whether the first device can directly communicate with the multiple devices according to the second device information set and a third device information set, and the third device information set is used to indicate the multiple Device information for the device.
The method according to claim 7, wherein after determining whether the first device can directly communicate with the plurality of devices, the method further comprises:

The first device sends first broadcast information, where the first broadcast information includes at least one of the following: detection information, indication information; wherein, the indication information in the first broadcast information is used to indicate that the first Whether the device is able to communicate directly with the plurality of devices.
The method according to claim 7 or 8, wherein before the first device communicates with the second device, the method further comprises:

The first device receives second broadcast information, where the second broadcast information is used to indicate the third device information set.
The method according to claim 9, wherein the D2D network further comprises: a fourth device as a management device, and the third device information set is sent by the fourth device through the second broadcast information .
The method according to any one of claims 1-10, wherein the D2D network includes at least one communication group, and any communication group in the at least one communication group includes at least three of the plurality of devices. devices.
The method according to any one of claims 1-11, wherein if the target data is unicast data, the first device sends the target data to the third device, so that the second The third device forwards the target data to the second device, including:

The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in the unicast manner.
The method according to any one of claims 1-11, wherein if the target data is broadcast data, the first device sends the target data to the third device, so that the third device The device forwarding the target data to the second device includes:

The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in a broadcast manner.
The method according to any one of claims 1-11, wherein if the target data is multicast data, the first device sends the target data to the third device, so that the second The third device forwards the target data to the second device, including:

The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in a multicast manner.
The method according to claim 1, further comprising:

When the first device is capable of direct communication with the second device, the first device sends the target data to the second device.
A data transmission device, characterized in that it is applied in a device-to-device D2D network including a plurality of devices, the plurality of devices include a first device, a second device and a third device, and the device acts as the first equipment, including:

a processing unit, configured to determine a third device according to a first device information set when the first device cannot directly communicate with the second device, and the first device information set is used to indicate that among the plurality of devices, the at least one forwarding device forwarding data for the first device, the at least one forwarding device including the third device;

A sending unit, configured to send target data to the third device, so that the third device forwards the target data to the second device.
The apparatus of claim 16, wherein each forwarding device of the at least one forwarding device is capable of direct communication with the plurality of devices.
The device according to claim 16 or 17, wherein the device further comprises a receiving unit;

The receiving unit is configured to receive at least one indication information, the at least one indication information corresponds to the at least one forwarding device one by one, and the indication information of one forwarding device is used to indicate that the forwarding device can communicate with the plurality of devices direct communication;

The processing unit is further configured to determine the first device information set according to the at least one indication information and the device information of the at least one forwarding device.
The device according to any one of claims 16-18, wherein the processing unit is further configured to:

When the at least one forwarding device includes multiple forwarding devices, select the third device from the multiple forwarding devices according to preset parameter information, where the preset parameter information includes at least one of the following: power, signal-to-noise Compare.
The apparatus according to any one of claims 16-19, wherein whether the first device can directly communicate with the second device is determined according to a second device information set, and the second device information set It is used to indicate at least one direct communication device capable of direct communication with the first device among the plurality of devices.
The device according to claim 20, further comprising a receiving unit;

The receiving unit is further configured to receive at least one detection information, and the at least one detection information is in one-to-one correspondence with the at least one direct communication device;

The processing unit is further configured to determine the second device information set according to the at least one detection information and the device information of the at least one direct communication device.
The device according to claim 20 or 21, wherein the processing unit is further used for:

Determine whether the first device can directly communicate with the multiple devices according to the second device information set and a third device information set, where the third device information set is used to indicate device information of the multiple devices.
The device according to claim 22, wherein the sending unit is also used for:

Sending first broadcast information, where the first broadcast information includes at least one of the following: detection information, indication information; wherein, the indication information in the first broadcast information is used to indicate whether the first device can communicate with the The multiple devices mentioned above can communicate directly.
The device according to claim 22 or 23, wherein the device further comprises a receiving unit;

The receiving unit is further configured to receive second broadcast information, where the second broadcast information is used to indicate the third device information set.
The device according to claim 24, wherein the D2D network further comprises: a fourth device as a management device, and the third device information set is sent by the fourth device through the second broadcast information .
The apparatus according to any one of claims 16-25, wherein the D2D network includes at least one communication group, and any communication group in the at least one communication group includes at least three of the plurality of devices. devices.
The device according to any one of claims 16-26, wherein if the target data is unicast data, the sending unit is further configured to:

sending the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in the unicast manner.
The device according to any one of claims 16-26, wherein if the target data is broadcast data, the sending unit is further configured to:

The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in a broadcast manner.
The device according to any one of claims 16-26, wherein if the target data is multicast data, the sending unit is further configured to:

The first device sends the target data to the third device in a unicast manner, so that the third device forwards the target data to the second device in a multicast manner.
The device according to claim 16, wherein the sending unit is also used for:

When the first device is capable of direct communication with the second device, sending the target data to the second device.
A data transmission device, characterized in that the device includes: a processor and a memory, and instructions are stored in the memory, and when the processor executes the instructions, the device implements claims 1-15 any one of the methods described.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are run on a device, the device is made to perform the operation described in any one of claims 1-15. Methods.