CN105611483A - D2D communication method and D2D communication device - Google Patents

Abstract

The present invention relates to the field of communication technology, discloses a D2D communication method and equipment, and solves the problem that D2D equipment cannot perform effective D2D communication in a high-speed mobile scene. The method is as follows: firstly, the first terminal receives the D2D discovery signal broadcast by the second terminal capable of providing D2D data, and the D2D discovery signal carries the mobility status information of the second terminal; then the first terminal receives the D2D discovery signal broadcast by the second terminal After receiving the signal, it matches its own mobile state information with the mobile state information of the second terminal to obtain a matching result; finally, when the first terminal determines that the matching result meets the preset matching conditions, it establishes a D2D connection with the second terminal. In this way, It can ensure the establishment of effective D2D connection of the terminal, and can ensure the stability of D2D communication for a long time, while avoiding invalid repeated connections, reducing resource waste, further saving network overhead, and improving system performance.

Description

A method and device for D2D communication

technical field

The present invention relates to the field of communication technology, in particular to a method and device for D2D communication.

Background technique

Device-to-Device (D2D) communication is a new type of technology that allows terminals to communicate directly through multiplexing cell resources under the control of the system. It can increase the spectral efficiency of the cellular communication system. Reducing the transmit power of the terminal solves the problem of lack of spectrum resources in the wireless communication system to a certain extent. D2D direct communication is the hotspot of 3GPP standardization recently, and it is also a potential technology of 5G in the future. Current D2D standardization mainly focuses on device discovery with network coverage and point-to-multipoint direct communication in public safety applications without network coverage. Public safety refers to earthquakes or emergencies where the cellular network does not work properly, allowing off-net communication between terminals.

In the current D2D device discovery mechanism, the source terminal that wants to provide D2D services broadcasts a device discovery signal on the resources allocated by the network side. The discovery signal may carry relevant information about D2D services. When the surrounding receiving terminals receive the discovery signal, if they If you are interested in this D2D service, go to the corresponding resource to receive the relevant data information of the D2D service. The corresponding resource may be a public resource allocated in advance by the network side, or a special resource temporarily allocated by the network side for this communication. .

In the existing device discovery mechanism, any receiving terminal that receives a discovery signal strength higher than a certain threshold can be considered to be able to perform D2D communication with the source terminal. However, this discovery mechanism is only suitable for quasi-static application scenarios such as stationary or walking. When the relative speed between terminals is high, such as high-speed rail and expressway, only relying on signal strength information may find other terminals that are not suitable for direct communication. Terminals, such as two terminals traveling in opposite directions, even if they help them establish a D2D communication connection, they will be disconnected soon due to the distance, which will bring unnecessary resource allocation and other overhead to the network and affect the efficiency and quality of D2D discovery .

Contents of the invention

The purpose of the present invention is to provide a method and device for D2D communication, so as to solve the problem in the prior art that D2D devices cannot successfully establish an effective D2D connection in a high-speed mobile scene.

The purpose of the present invention is achieved through the following technical solutions:

A method for D2D communication, comprising:

The first terminal receives a D2D discovery signal broadcast by a second terminal capable of providing D2D data, where the D2D discovery signal carries movement state information of the second terminal;

After receiving the D2D discovery signal broadcast by the second terminal, the first terminal matches its own mobility state information with the mobility state information of the second terminal to obtain a matching result;

When determining that the matching result satisfies a preset matching condition, the first terminal establishes a D2D connection with the second terminal.

In this way, the network side helps the terminal to perform D2D communication according to information such as the terminal’s moving speed and moving direction, so that the terminal can efficiently perform direct communication between devices, enjoy high-speed data services, and ensure the stability of D2D communication for a long time. At the same time, the possibility of connecting with a terminal that is not suitable for D2D communication is greatly reduced, invalid repeated connections are avoided, and resource waste is reduced.

Optionally, after the first terminal receives the D2D discovery signal broadcast by the second terminal, before matching its own mobility state information with the mobility state information of the second terminal, the method further includes:

Whether the first terminal can perform D2D communication is judged according to the current operating state of the first terminal, wherein after it is confirmed that the first terminal is capable of D2D communication, it is determined that a subsequent matching operation can be performed.

In this way, the stability and efficiency of the D2D communication can be further ensured.

Optionally, after receiving the D2D discovery signal broadcast by the second terminal, the first terminal matches its own mobility state information with the mobility state information of the second terminal to obtain a matching result, including:

The first terminal determines its own moving direction and moving speed based on its own moving state information, and determines the moving direction and moving speed of the second terminal based on the moving state information of the second terminal;

The first terminal matches its own moving state information with the second terminal's moving state information, and determines that its own moving direction is consistent with the second terminal's moving direction, and the difference between its own moving speed and the second terminal's moving speed is equal to When the set threshold is exceeded, it is determined that the matching result satisfies the preset matching condition;

or,

The first terminal determines its own moving direction based on its own moving state information, and determines the moving direction of the second terminal based on the moving state information of the second terminal;

The first terminal matches its own moving state information with the second terminal's moving state information, and determines that its own moving direction is consistent with the moving direction of the second terminal, and that the signal strength of the D2D discovery signal reaches When the corresponding threshold is met, it is determined that the matching result satisfies the preset matching condition.

Optionally, the first terminal determines that its own moving direction is consistent with the second terminal's moving direction, including:

When the first terminal determines that its own moving direction is exactly the same as that of the second terminal, it determines that the two directions are consistent; or,

The first terminal determines that there is an included angle between the moving direction of itself and the moving direction of the second terminal and the included angle is not greater than a set threshold, and determines that the two directions are consistent.

Optionally, after determining that the matching result satisfies a preset matching condition, the first terminal establishes a D2D connection with the second terminal, including:

When the first terminal determines that the matching result satisfies the preset matching condition, it sends a resource request for D2D communication with the second terminal to the network side, the resource request carries status information of the first terminal, and the first terminal is on the network side. Establishing a D2D connection with the second terminal on resources allocated to the first terminal according to the state information reported by the first terminal;

or,

When the first terminal determines that the matching result satisfies the preset matching condition, it sends a request for D2D communication to the second terminal. After confirming the reported state information, establish a D2D connection with the second terminal on the resources allocated by the network side for the second terminal;

or,

When the first terminal determines that the matching result satisfies the preset matching condition, it establishes a D2D connection with the second terminal on the resources previously allocated by the network side for D2D communication.

In this way, terminals capable of D2D communication can choose one connection mode from the above-mentioned D2D communication connection modes to perform D2D communication without being limited to a fixed communication connection mode, thereby further improving the connection success rate of D2D communication between terminals.

A terminal for D2D communication, including:

A first communication unit, configured to receive a D2D discovery signal broadcast by another terminal capable of providing D2D data, where the D2D discovery signal carries mobility status information of the other terminal;

a matching unit, configured to match its own mobility state information with the mobility state information of another terminal after receiving the D2D discovery signal broadcast by the other terminal, to obtain a matching result;

The second communication unit is configured to establish a D2D connection with another terminal when the matching unit determines that the matching result meets a preset matching condition.

In this way, the network side helps the terminal to perform D2D communication according to information such as the terminal’s moving speed and moving direction, so that the terminal can efficiently perform direct communication between devices, enjoy high-speed data services, and ensure the stability of D2D communication for a long time. At the same time, the possibility of connecting with a terminal that is not suitable for D2D communication is greatly reduced, invalid repeated connections are avoided, and resource waste is reduced.

Optionally, the terminal also includes:

The judging unit is configured to, after the first communication unit receives the D2D discovery signal broadcast by the other terminal, before the matching unit matches its own mobility status information with the mobility status information of the other terminal, according to The current operating state of the terminal determines whether the terminal can perform D2D communication, wherein after it is confirmed that the terminal is capable of D2D communication, it is determined that the subsequent matching operation can be performed.

In this way, the stability and efficiency of the D2D communication can be further ensured.

Optionally, after receiving the D2D discovery signal broadcast by the other terminal, match the mobile state information of the terminal with the mobile state information of the other terminal, and when the matching result is obtained, the matching unit is used for:

determining the moving direction and moving speed of the terminal based on the moving state information of the terminal, and determining the moving direction and moving speed of the other terminal based on the moving state information of the other terminal;

Matching the moving state information of the terminal with the moving state information of another terminal, determining that the moving direction of the terminal is consistent with the moving direction of the other terminal, and the moving speed of the terminal is the same as the moving speed of the other terminal When the difference does not exceed the set threshold, it is determined that the matching result meets the preset matching condition;

or,

determining the moving direction of the terminal based on the moving state information of the terminal, and determining the moving direction of the other terminal based on the moving state information of the other terminal;

Matching the moving state information of the terminal with the moving state information of another terminal, determining that the moving direction of the terminal is consistent with the moving direction of the other terminal, and that the signal strength of the D2D discovery signal is uniform within a set time period. When the corresponding threshold is reached, it is determined that the matching result satisfies the preset matching condition.

Optionally, when it is determined that the moving direction of the terminal is consistent with the moving direction of another terminal, the matching unit is configured to:

When determining that the moving direction of the terminal is exactly the same as that of another terminal, determining that the two directions are consistent; or,

It is determined that there is an included angle between the moving direction of the terminal and the moving direction of another terminal and the included angle is not greater than a set threshold, and it is determined that the directions of the two are consistent.

Optionally, after the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit establishes a D2D connection with another terminal in the following manner:

When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit sends a resource request for D2D communication with another terminal to the network side, and the resource request carries state information of the terminal The second communication unit establishes a D2D connection with another terminal on the resource allocated to the terminal according to the state information reported by the terminal on the network side;

or,

When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit sends a request for D2D communication to another terminal, the request carries state information of the terminal, and the second After the other terminal confirms according to the state information reported by the terminal, the communication unit establishes a D2D connection with the other terminal on the resource allocated for the other terminal on the network side;

or,

When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit establishes a D2D connection with another terminal on a resource pre-allocated on the network side for D2D communication.

In this way, terminals capable of D2D communication can choose one connection mode from the above-mentioned D2D communication connection modes to perform D2D communication without being limited to a fixed communication connection mode, thereby further improving the connection success rate of D2D communication between terminals.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a flowchart of a method for D2D communication in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a terminal device for D2D communication in an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to enable the terminal to effectively establish a D2D connection in a high-speed mobile scenario, in the embodiment of the present invention, the network side helps the terminal to perform D2D communication according to the moving direction and moving speed of the terminal, so that the terminal can efficiently perform direct communication between devices, Enjoy high-speed data services and greatly save network overhead. This solution is especially suitable for high-speed moving scenarios such as high-speed rail and expressways.

The solution of the present invention will be described in detail below through specific examples. Of course, the present invention is not limited to the following examples.

Referring to Figure 1, in the embodiment of the present invention, the specific flow of the D2D communication method is as follows:

Step 101: the first terminal receives a D2D discovery signal broadcast by a second terminal capable of providing D2D data, and the D2D discovery signal carries movement status information of the second terminal.

For example, assuming that the second terminal capable of providing D2D data is called UE2, when initiating a game battle service request, if UE2 moves faster, such as reaching 100km/h or more, then it can try to use the D2D communication method first. Specifically, During the device discovery process, UE2 broadcasts a D2D discovery signal on the resources allocated for D2D communication in advance on the network side. The D2D discovery signal carries UE2’s mobile status information, that is, at least sends its own moving direction and moving speed to each device with D2D services. Capable receiving terminals are assumed to be UE1, UE3, and UE5.

Specifically, the moving speed sent by UE2 may be in a numerical range, such as 100-105 km/h, or the moving speed sent by UE2 may also be a specific numerical value, such as 102 km/h.

For determining the moving direction of the UE2, it may be determined by means of Global Positioning System (Global Positioning System, GPS) information, or a positioning mechanism on the network side.

Step 102: After receiving the D2D discovery signal broadcast by the second terminal, the first terminal matches its own mobility status information with the mobility status information of the second terminal to obtain a matching result.

In order to enhance the security of the D2D discovery process, when matching the first terminal according to the D2D discovery signal broadcast by the second terminal, it is also possible to confirm the D2D communication of the first terminal receiving the D2D discovery signal. Specifically, in this The following processing procedures may also be included in the embodiment:

After the first terminal receives the D2D discovery signal broadcast by the second terminal, before matching its own mobility status information with the mobility status information of the second terminal, it needs to determine whether the first terminal can perform D2D according to the current operating status of the first terminal. Communication is judged, wherein after confirming that the first terminal is capable of D2D communication, it is determined that the subsequent matching operation can be performed, that is, matching judgment is performed between the own moving state information and the moving state information of the second terminal.

For example, UE1, UE3, UE4, and UE5 are UE1, UE3, UE4, and UE5 that are capable of D2D services around UE2. After UE1, UE3, UE4, and UE5 receive the D2D discovery signal from UE2, UE1, UE3, UE4, and UE5 will operate according to their own Status, to determine whether D2D communication is possible, that is, to judge whether the current operating capability of the terminal supports D2D communication according to its own operating status. . Assuming that the power of UE1 is less than five minutes, it refuses to perform D2D communication, then subsequent matching judgment will not be performed, assuming that UE3 and UE1 are located in different compartments of a high-speed train, and the CPU usage of UE3 is only 8%, then Agree to establish D2D communication with UE1, at this time, UE3 will make a matching judgment on its own mobility state information and UE2's mobility state information.

Specifically, when performing step 102, the following operations may be performed but not limited to:

The first operation is: the first terminal determines its own moving direction and moving speed based on its own moving state information, and determines the moving direction and moving speed of the second terminal based on the moving state information of the second terminal; Match the moving state information of the second terminal with the moving state information of the second terminal, determine that the moving direction of the self is consistent with the moving direction of the second terminal, and the difference between the moving speed of the self and the moving speed of the second terminal does not exceed the set threshold , to determine that the matching result satisfies the preset matching condition;

In this case, the moving directions of the first terminal and the second terminal are the same, and the moving speeds of the first terminal and the second terminal are similar. At this time, the first terminal and the second terminal can maintain an effective D2D Within the communication range, therefore, it is determined that the matching condition is met.

On the other hand, there are the following two situations where the first terminal determines that its own moving direction is consistent with the moving direction of the second terminal:

The first situation is: when the first terminal determines that its own moving direction is exactly the same as that of the second terminal, it determines that the two directions are consistent;

The second situation is: the first terminal determines that there is an angle between the moving direction of itself and the moving direction of the second terminal and the angle is not greater than a set threshold (for example, 10 degrees), and determines that the two directions are consistent. , the threshold is set to ensure that the angle between the moving directions will not cause the distance between the two terminals to gradually diverge after a certain period of time, and exceed the service range of the D2D communication.

In subsequent embodiments, mentioning that the moving directions between two terminals are consistent includes the above two situations, which will not be described again.

For example: assume that UE1 and UE3 are UE1 and UE3 capable of D2D services around UE2. After receiving the D2D discovery signal from UE2, UE1 and UE3 check their respective moving direction, moving speed, and monitor the attenuation of the received D2D discovery signal. It is found that the moving direction of UE1 is exactly the same as that of UE2 and the moving speed of UE1 is V1=105km/h, while the moving speed of UE2 is V2=102km/h, and the speed difference between the two is smaller than the set V0( Assuming V0=5km/h), it can be considered that UE1 can perform D2D communication with UE2; it is found that there is an angle A between the moving direction of UE3 and the moving direction of UE2, and the angle A is 7 degrees, which is smaller than the preset threshold (such as A0=10 degrees), and UE3's moving speed V1=103km/h, while UE2's moving speed V2=102km/h, the speed difference between the two is less than the set V0 (assuming V0=5km/h) , it can be considered that UE3 can perform D2D communication with UE2.

The second operation is: the first terminal determines its own moving direction based on its own moving state information, and determines the moving direction of the second terminal based on its own moving state information; the first terminal compares its own moving state information with the second terminal's moving direction. Match the mobile state information of the two terminals, determine that the moving direction of itself is consistent with the moving direction of the second terminal, and when the signal strength of the received D2D discovery signal reaches the corresponding threshold within the set duration, determine that the matching result satisfies the preset matching criteria.

In this case, when the moving directions of the first terminal and the second terminal are the same, and the signal strength of the D2D discovery signal of the second terminal received by the first terminal reaches the corresponding threshold within the set duration, at this time, the first terminal The terminal and the second terminal can remain within the effective D2D communication range within a certain period of time, therefore, it is determined that the matching condition is met.

For example: Assuming that UE4 and UE5 are UE4 and UE5 capable of D2D services around UE2, after UE4 and UE5 receive the D2D discovery signal from UE2, they check their respective moving direction, moving speed, and monitor the attenuation of the received D2D discovery signal , it is found that the moving direction of UE4 is exactly the same as that of UE2, and the signal strength of UE2's D2D discovery signal received by UE4 reaches the corresponding threshold within the set time period (assumed to be 5 minutes) (for example, the signal strength reaches - 85dBm), it can be considered that UE4 can perform D2D communication with UE2; at the same time, it is found that there is an angle B between the moving direction of UE5 and the moving direction of UE2, and the angle B is 5 degrees, which is smaller than the set threshold (such as A0=10 degrees) , and the signal strength of the D2D discovery signal of UE2 received by UE5 reaches the corresponding threshold (for example, the signal strength reaches -85dBm) within the set time period (assumed to be 5 minutes), then it can be considered that UE5 can perform D2D communication with UE2 .

Another example: assume that UE6, a terminal with D2D service capability located around UE2, checks its own moving direction, moving speed, and monitors the attenuation of the received D2D discovery signal after receiving the D2D discovery signal of UE2. Assume that the moving direction of UE6 is Inconsistent with the moving direction of UE2, regardless of whether the moving speed of UE5 and the received signal strength of the D2D discovery signal of UE2 meet the preset conditions, it is considered that UE5 cannot perform D2D communication with UE2.

Step 103: the first terminal establishes a D2D connection with the second terminal when determining that the matching result satisfies a preset matching condition.

Specifically, after the first terminal determines that the matching result obtained through step 102 satisfies the preset matching condition, when establishing a D2D connection with the second terminal, the following methods may be adopted but not limited to:

The first method is: when the first terminal determines that the matching result satisfies the preset matching condition, it sends a resource request for D2D communication with the second terminal to the network side, and the resource request carries the state information of the first terminal, and the first terminal After the network side allocates resources for direct D2D communication with the second terminal to the first terminal according to the status information reported by the first terminal, establish a D2D connection with the second terminal on the resources allocated by the network side to the first terminal and the second terminal .

For example: UE1 is a terminal that meets the conditions for D2D communication with UE2. UE1 requests resources for D2D direct communication with UE2 from the network side. The resource request carries various status information of UE1. Optionally, UE1's Mobile status information (including moving direction and moving speed), location information, etc.; the network side allocates resources for D2D communication to UE1 and UE2, and then UE1 and UE2 perform direct data communication on the allocated resources.

The second method is: when the first terminal determines that the matching result meets the preset matching conditions, it sends a request for D2D communication to the second terminal, and the request carries the state information of the first terminal, and the first terminal sends the request to the second terminal according to the After confirming the status information reported by the first terminal, a D2D connection is established with the second terminal on the resources allocated for the second terminal by the network side.

For example: UE1 is a terminal that meets the conditions for D2D communication with UE2. UE1 feeds back various state information of itself to UE2; UE2 confirms according to the various state information of UE1 fed back by UE1. D2D communication is performed on the allocated resources, and when UE2 initiates a D2D service request, the network side allocates resources for D2D communication to UE2.

The third manner is: when the first terminal determines that the matching result satisfies a preset matching condition, the first terminal establishes a D2D connection with the second terminal on resources previously allocated for D2D communication on the network side.

For example: UE1 is a terminal that meets the conditions for D2D communication with UE2, and UE1 performs D2D communication with UE2 on the resource used for D2D communication that was broadcast by the network side in the system message before.

Based on the above technical solution, as shown in FIG. 2, an embodiment of the present invention also provides a D2D communication terminal, including a first communication unit 20, a matching unit 21, a second communication unit 22, and a judging unit 23, wherein:

The first communication unit 20 is configured to receive a D2D discovery signal broadcast by another terminal capable of providing D2D data, where the D2D discovery signal carries mobility status information of the other terminal;

The matching unit 21 is configured to, after receiving the D2D discovery signal broadcast by the other terminal, match its own mobility state information with the mobility state information of another terminal to obtain a matching result;

The second communication unit 22 is configured to establish a D2D connection with another terminal when the matching unit determines that the matching result satisfies a preset matching condition.

In this way, the network side helps the terminal to perform D2D communication according to information such as the terminal’s moving speed and moving direction, so that the terminal can efficiently perform direct communication between devices, enjoy high-speed data services, and ensure the stability of D2D communication for a long time. At the same time, the possibility of connecting with a terminal that is not suitable for D2D communication is greatly reduced, invalid repeated connections are avoided, and resource waste is reduced.

Optionally, the terminal also includes:

The judging unit 23 is configured to, after the first communication unit 20 receives the D2D discovery signal broadcast by the other terminal, before the matching unit 21 matches its own mobility status information with the mobility status information of the other terminal, according to The current operating state of the terminal determines whether the terminal can perform D2D communication, wherein after it is confirmed that the terminal is capable of D2D communication, it is determined that the subsequent matching operation can be performed.

Optionally, after receiving the D2D discovery signal broadcast by the other terminal, the mobile state information of the terminal is matched with the mobile state information of the other terminal, and when the matching result is obtained, the matching unit 21 is used for:

determining the moving direction and moving speed of the terminal based on the moving state information of the terminal, and determining the moving direction and moving speed of the other terminal based on the moving state information of the other terminal;

Match the moving state information of the terminal with the moving state information of another terminal, determine that the moving direction of the terminal is consistent with the moving direction of the other terminal, and the difference between the moving speed of the terminal and the moving speed of the other terminal is equal to When the set threshold is exceeded, it is determined that the matching result satisfies the preset matching condition;

or,

determining the moving direction of the terminal based on the moving state information of the terminal, and determining the moving direction of the other terminal based on the moving state information of the other terminal;

Match the mobile state information of the terminal with the mobile state information of another terminal, determine that the moving direction of the terminal is consistent with the moving direction of the other terminal, and that the signal strength of the D2D discovery signal reaches the corresponding threshold within the set time period. Within a limited time, it is determined that the matching result satisfies the preset matching condition.

Optionally, when it is determined that the moving direction of the terminal is consistent with the moving direction of another terminal, the matching unit 21 is configured to:

When it is determined that the moving direction of the terminal is exactly the same as the moving direction of another terminal, it is determined that the two directions are consistent; or,

It is determined that there is an included angle between the moving direction of the terminal and the moving direction of the other terminal and the included angle is not greater than a set threshold, and it is determined that the directions of the two are consistent.

Optionally, after the matching unit 21 determines that the matching result meets a preset matching condition, the second communication unit 22 establishes a D2D connection with another terminal in the following manner:

The first way is: when the matching unit 21 determines that the matching result satisfies the preset matching condition, the second communication unit 22 sends a resource request for D2D communication with another terminal to the network side, and the resource request carries the terminal's state information, the second communication unit 22 establishes a D2D connection with another terminal on the resources allocated to the terminal by the network side according to the state information reported by the terminal;

The second method is: when the matching unit 21 determines that the matching result satisfies the preset matching condition, the second communication unit 22 sends a request for D2D communication to another terminal, and the request carries the status information of the terminal. The second communication unit 22 establishes a D2D connection with the other terminal on the resource allocated for the other terminal on the network side after the other terminal confirms according to the state information reported by the terminal;

The third manner is: when the matching unit 21 determines that the matching result satisfies a preset matching condition, the second communication unit 22 establishes a D2D connection with another terminal on a resource previously allocated for D2D communication on the network side.

In this way, terminals capable of D2D communication can choose one connection mode from the above-mentioned D2D communication connection modes to perform D2D communication without being limited to a fixed communication connection mode, thereby further improving the connection success rate of D2D communication between terminals.

To sum up, in the embodiment of the present invention, the first terminal receives the D2D discovery signal broadcast by the second terminal capable of providing D2D data, and the D2D discovery signal carries the mobility status information of the second terminal; then the first terminal receives the second terminal After the D2D discovery signal broadcast by the second terminal, it matches its own mobile state information with the mobile state information of the second terminal to obtain a matching result; finally, when the first terminal determines that the matching result meets the preset matching condition, it matches the second terminal Establishing a D2D connection, using this D2D discovery mechanism to help the terminal to perform D2D communication, can ensure that the terminal can effectively establish a D2D connection, and can ensure the stability of the D2D communication for a long time, while greatly reducing the possibility of connecting with a terminal that is not suitable for D2D communication It avoids invalid repeated connections, reduces waste of resources, and further saves network overhead, thereby improving system performance.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A method for D2D communication, comprising: The first terminal receives a D2D discovery signal broadcast by a second terminal capable of providing D2D data, where the D2D discovery signal carries movement state information of the second terminal; After receiving the D2D discovery signal broadcast by the second terminal, the first terminal matches its own mobility state information with the mobility state information of the second terminal to obtain a matching result; When determining that the matching result satisfies a preset matching condition, the first terminal establishes a D2D connection with the second terminal. 2. The method according to claim 1, wherein after the first terminal receives the D2D discovery signal broadcast by the second terminal, before matching its own mobility status information with the mobility status information of the second terminal, Further includes: Whether the first terminal can perform D2D communication is judged according to the current operating state of the first terminal, wherein after it is confirmed that the first terminal is capable of D2D communication, it is determined that a subsequent matching operation can be performed. 3. The method according to claim 1, wherein after receiving the D2D discovery signal broadcast by the second terminal, the first terminal matches its own mobility status information with the mobility status information of the second terminal to obtain Matching results, including: The first terminal determines its own moving direction and moving speed based on its own moving state information, and determines the moving direction and moving speed of the second terminal based on the moving state information of the second terminal; The first terminal matches its own moving state information with the second terminal's moving state information, and determines that its own moving direction is consistent with the second terminal's moving direction, and the difference between its own moving speed and the second terminal's moving speed is equal to When the set threshold is exceeded, it is determined that the matching result satisfies the preset matching condition; or, The first terminal determines its own moving direction based on its own moving state information, and determines the moving direction of the second terminal based on the moving state information of the second terminal; The first terminal matches its own moving state information with the second terminal's moving state information, and determines that its own moving direction is consistent with the moving direction of the second terminal, and that the signal strength of the D2D discovery signal reaches When the corresponding threshold is met, it is determined that the matching result satisfies the preset matching condition. 4. The method according to claim 3, wherein the first terminal determines that its own moving direction is consistent with the second terminal's moving direction, comprising: When the first terminal determines that its own moving direction is exactly the same as that of the second terminal, it determines that the two directions are consistent; or, The first terminal determines that there is an included angle between the moving direction of itself and the moving direction of the second terminal and the included angle is not greater than a set threshold, and determines that the two directions are consistent. 5. The method according to claim 1 or 3, wherein the first terminal establishes a D2D connection with the second terminal after determining that the matching result satisfies a preset matching condition, comprising: When the first terminal determines that the matching result satisfies the preset matching condition, it sends a resource request for D2D communication with the second terminal to the network side, the resource request carries status information of the first terminal, and the first terminal is on the network side. Establishing a D2D connection with the second terminal on resources allocated to the first terminal according to the status information reported by the first terminal; or, When the first terminal determines that the matching result satisfies the preset matching condition, it sends a request for D2D communication to the second terminal. After confirming the reported state information, establish a D2D connection with the second terminal on the resources allocated by the network side for the second terminal; or, When the first terminal determines that the matching result satisfies the preset matching condition, it establishes a D2D connection with the second terminal on the resources previously allocated by the network side for D2D communication. 6. A terminal for D2D communication, comprising: A first communication unit, configured to receive a D2D discovery signal broadcast by another terminal capable of providing D2D data, where the D2D discovery signal carries mobility status information of the other terminal; a matching unit, configured to match its own mobility state information with the mobility state information of another terminal after receiving the D2D discovery signal broadcast by the other terminal, to obtain a matching result; The second communication unit is configured to establish a D2D connection with another terminal when the matching unit determines that the matching result meets a preset matching condition. 7. The terminal according to claim 6, further comprising: The judging unit is configured to, after the first communication unit receives the D2D discovery signal broadcast by the other terminal, before the matching unit matches its own mobility status information with the mobility status information of the other terminal, according to The current operating state of the terminal determines whether the terminal can perform D2D communication, wherein after it is confirmed that the terminal is capable of D2D communication, it is determined that the subsequent matching operation can be performed. 8. The terminal according to claim 6, wherein after receiving the D2D discovery signal broadcast by the other terminal, the mobile state information of the terminal is matched with the mobile state information of the other terminal to obtain a matching As a result, the matching unit is used to: determining the moving direction and moving speed of the terminal based on the moving state information of the terminal, and determining the moving direction and moving speed of the other terminal based on the moving state information of the other terminal; Matching the moving state information of the terminal with the moving state information of another terminal, determining that the moving direction of the terminal is consistent with the moving direction of the other terminal, and the moving speed of the terminal is the same as the moving speed of the other terminal When the difference does not exceed the set threshold, it is determined that the matching result meets the preset matching condition; or, determining the moving direction of the terminal based on the moving state information of the terminal, and determining the moving direction of the other terminal based on the moving state information of the other terminal; Matching the moving state information of the terminal with the moving state information of another terminal, determining that the moving direction of the terminal is consistent with the moving direction of the other terminal, and that the signal strength of the D2D discovery signal is uniform within a set time period. When the corresponding threshold is reached, it is determined that the matching result satisfies the preset matching condition. 9. The terminal according to claim 8, wherein when it is determined that the moving direction of the terminal is consistent with the moving direction of another terminal, the matching unit is configured to: When determining that the moving direction of the terminal is exactly the same as that of another terminal, determining that the two directions are consistent; or, It is determined that there is an included angle between the moving direction of the terminal and the moving direction of another terminal and the included angle is not greater than a set threshold, and it is determined that the directions of the two are consistent. 10. The terminal according to claim 6 or 8, wherein after the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit establishes a D2D connection with another terminal in the following manner : When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit sends a resource request for D2D communication with another terminal to the network side, and the resource request carries state information of the terminal The second communication unit establishes a D2D connection with another terminal on the resource allocated to the terminal according to the state information reported by the terminal on the network side; or, When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit sends a request for D2D communication to another terminal, the request carries state information of the terminal, and the second After the other terminal confirms according to the state information reported by the terminal, the communication unit establishes a D2D connection with the other terminal on the resource allocated for the other terminal on the network side; or, When the matching unit determines that the matching result satisfies a preset matching condition, the second communication unit establishes a D2D connection with another terminal on a resource pre-allocated on the network side for D2D communication.