WO2017005174A1 - D2d resource allocation method and base station - Google Patents

Abstract

Provided in the present invention are a D2D resource allocation method and base station. The method comprises: receiving, by a base station, position information and D2D resource allocation information of D2D terminals sent by neighboring base stations of the base station; and allocating, by the base station, D2D resources for D2D terminals within a coverage of the base station according to the position information and the D2D resource allocation information of the D2D terminals sent by the neighboring base stations and position information and D2D resource allocation information of the D2D terminals within the coverage of the base station. The base station of the present invention can allocate D2D resources more reasonably, reduce possibility of resource collision of allocated D2D resources and reduce switching among D2D resources, thereby achieving reasonable and highly efficient D2D resource allocation.

Description

D2D resource allocation method and base station

The present application claims priority to Chinese Patent Application No. 201510391242.2, entitled "D2D Resource Allocation Method and Base Station", filed on July 6, 2015, the entire contents of which is incorporated herein by reference. in.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a device to device (D2D, also translated into D2D terminal through) resource allocation method and a base station.

Background technique

In the traditional cellular communication technology, services such as voice and data of two D2D terminals are exchanged through a base station (Evolved Node B, eNode B) and a core network. In order to improve the transmission efficiency between D2D terminals, a technology for direct communication between D2D terminals, that is, D2D technology, has been proposed. When the distance between the D2D terminals is very close, the D2D communication mode can be used to implement the interaction. At this time, the D2D terminals do not need to perform the interaction of voice and data through the base station.

The D2D communication in which the cellular network participates refers to the D2D communication controlled by the cellular network in the frequency band authorized by the cellular network. For example, in the Long Term Evolution (LTE) network, the D2D communication refers to the long-term evolution (Long). In the Term Evolution, LTE) licensed band, D2D communication controlled by the LTE network. Compared with the traditional D2D communication, the D2D communication of the cellular network has higher security and better quality of service (QoS) guarantee; on the other hand, the control of D2D communication by the LTE network can also be overcome. Some problems with traditional D2D communication, such as uncontrollable interference.

The D2D communication is introduced into the cellular network, and the D2D communication will share the time-frequency resources with the cellular communication, and the cellular network needs to allocate the appropriate D2D resources for the D2D communication according to the usage of the cellular resources. At present, when a base station in a cellular network allocates D2D resources to a D2D terminal participating in D2D communication, first selects an idle time-frequency resource. When there is no idle time-frequency resource, for a used time-frequency resource, a three-hop distance is selected. The time-frequency resources are multiplexed.

For a D2D terminal with a fast moving speed and a large moving range, for example, an in-vehicle D2D terminal, when the base station allocates D2D resources to the D2D terminal participating in the D2D communication by the above method, it is likely that the time-frequency resource allocated by the D2D terminal is transmitted. conflict. For example, as shown in FIG. 1 , it is a schematic diagram of a time-frequency resource conflict according to an embodiment of the present invention. In FIG. 1, the distance between the base station A and the base station B is greater than the three-hop distance. The base station A has an in-vehicle D2D terminal in the coverage area: the in-vehicle D2D terminal A, and the in-vehicle D2D terminal in the coverage area of the base station B: the in-vehicle D2D terminal B. The time-frequency resource allocated by the base station A for the in-vehicle D2D terminal A in the coverage area is the same as the time-frequency resource allocated by the base station B for the in-vehicle D2D terminal B in the coverage area thereof, and the in-vehicle D2D terminal B resides under the base station B, and the vehicle The D2D terminal A moves to the coverage area of the base station B, and when the in-vehicle D2D terminal A moves into the coverage area of the base station B, the vehicle A resource collision occurs between the D2D terminal A and the in-vehicle D2D terminal B, causing the two in-vehicle D2D terminals to interfere with each other.

At present, there is no clear solution to how to properly allocate D2D resources for D2D communication in which cellular networks participate to reduce the probability of resource collisions in D2D resources.

Summary of the invention

The embodiment of the invention provides a D2D resource allocation method and a base station, which are used to reduce the probability of resource collision of D2D resources.

An embodiment of the present invention provides a D2D resource allocation method, including:

Receiving, by the base station, location information of the D2D terminal sent by the neighboring base station of the base station, and D2D resource allocation information of the D2D terminal;

The base station is, according to the location information of the D2D terminal sent by the neighboring base station, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal, The D2D terminal in the coverage area allocates D2D resources.

Preferably, the method further includes:

The base station sends the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal to the neighboring base station of the base station.

Preferably, the base station sends the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal to the neighboring base station of the base station, including:

When determining, by the base station, that the D2D terminal in the coverage area of the base station meets one of the following conditions, the base station sends location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation of the D2D terminal to the neighboring base station. information:

The moving distance of the D2D terminal exceeds a threshold;

The D2D resource allocation information used by the D2D terminal changes;

The D2D terminal leaves the coverage area of the base station;

The D2D terminal enters a coverage area of the base station.

Preferably, the base station uses the location information of the D2D terminal in the coverage area of the base station and the neighboring base station coverage area boundary of the base station is smaller than the minimum spatial reusable distance of the D2D resource, and the D2D resource allocation information of the D2D terminal. Send to the neighbor base station.

Preferably, after the base station allocates D2D resources to the D2D terminal in the coverage area of the base station, the base station further includes:

The base station receives the D2D link collision feedback information sent by the D2D terminal, and the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision;

The base station re-allocates D2D resources for the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information.

Preferably, after receiving the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, the base station further includes:

Determining, by the base station, the D2D resource used by the D2D terminal in the coverage area of the base station, and the location sent by the neighboring base station, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station. When the D2D resource used by the D2D terminal corresponding to the information and the resource allocation information collides with the resource, the D2D terminal corresponding to the location information and the resource allocation information sent by the neighboring base station in the coverage of the base station collides with the resource. The D2D terminal reassigns D2D resources.

Preferably, the base station receives location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station.

Preferably, the location information of the D2D terminal includes one or any combination of the following parameters:

Longitude and latitude information of the D2D terminal;

The moving speed of the D2D terminal;

The movement acceleration of the D2D terminal;

The moving direction of the D2D terminal;

The elevation of the D2D terminal;

The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters:

D2D resources used by D2D terminals;

The allocation period of the D2D resources used by the D2D terminal.

Preferably, the D2D terminal is an in-vehicle D2D terminal.

An embodiment of the present invention provides a base station, including:

a first transceiver unit, configured to receive location information of a device to a device D2D terminal sent by a neighboring base station of the base station, and D2D resource allocation information of the D2D terminal;

The D2D resource allocation unit is configured to: according to the location information of the D2D terminal sent by the neighboring base station, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. The D2D terminal in the coverage area of the base station allocates D2D resources.

Preferably, the first transceiver unit is further configured to:

And transmitting, to the neighboring base station of the base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal.

Preferably, the first transceiver unit is specifically configured to:

When it is determined that the D2D terminal in the coverage area of the base station meets one of the following conditions, the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal are sent to the neighboring base station:

The moving distance of the D2D terminal exceeds a threshold;

The D2D resource allocation information used by the D2D terminal changes;

The D2D terminal leaves the coverage area of the base station;

The D2D terminal enters a coverage area of the base station.

Preferably, the first transceiver unit is specifically configured to:

Transmitting, to the neighboring base station, location information of a D2D terminal that is smaller than a minimum spatial reusable distance of a D2D resource in a coverage area of the base station from a neighboring base station coverage area of the base station, and D2D resource allocation information of the D2D terminal .

Preferably, the second transceiver unit is further configured to:

Receiving the D2D link collision feedback information sent by the D2D terminal, where the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision;

The D2D resource allocation unit is specifically configured to:

And allocating D2D resources to the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information.

Preferably, the D2D resource allocation unit is further configured to:

Determining, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, the D2D resource used by the D2D terminal in the coverage area of the base station, and the location information and resources sent by the neighboring base station When a resource collision occurs in the D2D resource used by the D2D terminal corresponding to the allocation information, the D2D terminal that has a resource collision with the D2D terminal corresponding to the location information and the resource allocation information transmitted by the neighboring base station in the coverage of the base station is re-established. Assign D2D resources.

Preferably, the base station receives location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station.

Preferably, the location information of the D2D terminal includes one or any combination of the following parameters:

Longitude and latitude information of the D2D terminal;

The moving speed of the D2D terminal;

The movement acceleration of the D2D terminal;

The moving direction of the D2D terminal;

The elevation of the D2D terminal;

The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters:

D2D resources used by D2D terminals;

The allocation period of the D2D resources used by the D2D terminal.

Preferably, the D2D terminal is an in-vehicle D2D terminal.

An embodiment of the present invention provides another base station, including: a processor, a memory, and a transceiver;

The transceiver is configured to receive location information of a device to a device D2D terminal sent by a neighboring base station of the base station, and D2D resource allocation information of the D2D terminal;

The processor is configured to read a program in the memory, and perform the following processes: performing location information of a D2D terminal, D2D resource allocation information of a D2D terminal, and D2D in a coverage area of the base station according to the neighboring base station The location information of the terminal and the D2D resource allocation information of the D2D terminal allocate D2D resources to the D2D terminal in the coverage area of the base station.

According to the method and the base station provided by the embodiment of the present invention, after receiving the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, the base station allocates D2D resources for the D2D terminal in the coverage area of the base station. The base station can perform D2D resource allocation according to the location information of the D2D terminal, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. The D2D resources are allocated more reasonably, the probability of resource collision of the allocated D2D resources is reduced, and the switching of the D2D resources is reduced, so that the D2D resource allocation is completed reasonably and efficiently.

DRAWINGS

1 is a schematic diagram of a time-frequency resource conflict in the prior art;

2 is a schematic diagram of a D2D communication architecture involved in a cellular network according to an embodiment of the present invention;

FIG. 3 is a flowchart of a D2D resource allocation method according to an embodiment of the present invention;

4 is a schematic diagram of a first D2D resource information area according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a second D2D resource information area according to an embodiment of the present invention;

FIG. 6 is a structural diagram of a base station according to an embodiment of the present invention;

FIG. 7 is a structural diagram of another base station according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the embodiment of the present invention, the base station centrally manages the D2D resources of the D2D terminals in the coverage area, and the base stations can access the D2D resources used by the D2D terminals in the coverage areas of the respective base stations through the X2 interface, and the base station can obtain a larger range. The D2D resource allocation information enables better allocation of D2D resources.

It should be noted that the D2D terminal in the embodiment of the present invention refers to a device capable of supporting cellular network communication and D2D communication, and may be an in-vehicle D2D terminal having the above functions, a mobile phone, or the like.

FIG. 2 is a schematic diagram of a D2D communication architecture involved in a cellular network according to an embodiment of the present invention. Figure 2 includes two types of links:

- Device to Network (D2N) link: a link that communicates between a D2D terminal and a base station of a cellular network;

- D2D link: A link that directly communicates between a D2D terminal and a D2D terminal.

Wherein, the D2N link is a conventional wireless communication link in a cellular network, and the D2D terminal is first established with the cellular network. After this link, the cellular network can allocate D2D resources to the D2D terminal through the D2N link.

In the prior art, when a base station schedules D2D resources, control signaling of the D2D resources is transmitted by the cellular network. The D2D resource used by the D2D terminal in the D2D communication does not have a matching relationship with the cellular network, and its coverage and characteristics are also different. If the base station can only obtain the D2D resource allocation information used by the D2D terminal in its coverage area, the base station The probability that the D2D resource allocated by the D2D terminal in the coverage area collides with the D2D resource used by the D2D terminal of the other base station coverage area increases.

For example, in conjunction with FIG. 1, the D2D resource allocated by the base station A to the D2D terminal A in its coverage area is the same as the D2D resource allocated by the base station B to the D2D terminal B in its coverage area, and the D2D terminal B resides in the coverage of the base station B. When the edge location in the area moves and the D2D terminal A moves into the neighboring cell of the coverage area of the base station B, the D2D communication between the D2D terminal A and the D2D terminal B interferes with each other.

In order to solve the above problem, in the embodiment of the present invention, the base station can avoid the above situation according to the D2D resource allocated by the D2D terminal in the coverage area according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station. occur.

The details are described below by way of specific embodiments.

As shown in FIG. 3, a flowchart of a D2D resource allocation method according to an embodiment of the present invention includes:

Step 301: The base station receives location information of the D2D terminal sent by the neighboring base station of the base station, and D2D resource allocation information of the D2D terminal.

In step 301, in order to reduce signaling overhead, the base station may receive location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station.

The X2 interface is a logical interface between two base stations and is an open interface that supports direct transmission of data and signaling between two base stations. The base stations are connected to each other through an X2 interface to form a mesh network.

Step 302: The base station is configured according to the location information of the D2D terminal, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. The D2D terminal in the coverage area of the base station allocates D2D resources.

Preferably, the location information of the D2D terminal interacting between the base stations may include one or any combination of the following parameters:

Longitude and latitude information of the D2D terminal;

The moving speed of the D2D terminal;

The movement acceleration of the D2D terminal;

The moving direction of the D2D terminal;

The elevation of the D2D terminal.

Preferably, the D2D resource allocation information of the D2D terminal interacting between the base stations may include one or any combination of the following parameters:

D2D resources used by D2D terminals;

The allocation period of the D2D resources used by the D2D terminal.

It should be noted that the information exchanged between the base stations includes the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, and the identifier of the D2D terminal corresponding to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal.

Similarly, the base station may also send location information of the D2D terminal and D2D resource allocation information of the D2D terminal in the coverage area of the base station to the neighboring base station of the base station.

In the above solution, when there are a large number of D2D terminals included in the coverage area of the base station, the amount of data transmitted between the base stations through the X2 interface is very large, which may cause congestion of the links between the base stations. In order to reduce the amount of data transmitted between the base stations, a policy of updating the D2D terminal information may be adopted. When the base station determines that the D2D terminal in the coverage area of the base station meets one of the following conditions, the base station sends the base station to the neighboring base station. Location information of the D2D terminal in the coverage area and D2D resource allocation information of the D2D terminal:

Condition 1. The moving distance of the D2D terminal exceeds the threshold;

Preferably, for the D2D terminal whose moving distance exceeds the threshold, the location information may be sent without transmitting the D2D resource allocation information, and the transmitted location information may include the following parameters: latitude and longitude information of the D2D terminal, moving speed of the D2D terminal, and D2D terminal One or more of moving acceleration, moving direction of the D2D terminal, and elevation of the D2D terminal.

Condition 2: D2D resource allocation information used by the D2D terminal changes;

Preferably, the terminal that changes the D2D resource allocation information may only transmit the D2D resource allocation information without transmitting the location information, and the D2D resource allocation information that is sent may include only the D2D resource used by the D2D terminal.

Condition 3: The coverage area of the D2D terminal leaving the base station;

Preferably, for the D2D terminal leaving the coverage area of the base station, the location information and the D2D resource allocation information may not be transmitted, but only the identifier of the D2D terminal may be sent out.

Condition 4: The D2D terminal enters the coverage area of the base station;

Preferably, the location information and the D2D resource allocation information may be transmitted for the D2D terminal entering the coverage area of the base station. The location information of the transmitted D2D terminal includes the following parameters: one or more of latitude and longitude information of the D2D terminal, a moving speed of the D2D terminal, a moving acceleration of the D2D terminal, a moving direction of the D2D terminal, and an elevation of the D2D terminal; The D2D resource allocation information of the transmitted D2D terminal may include one or more of the following parameters: a D2D resource used by the D2D terminal, and an allocation period of the D2D resource used by the D2D terminal.

In the above solution, when the D2D terminal moves faster, the D2D terminal density is lower; when the D2D terminal moves at a lower speed, the D2D terminal density is high. Therefore, the following situation does not occur: a large number of D2D terminals move quickly, and need to update the location information, and both need to switch time-frequency resources.

There may be only one cell or multiple cells in a coverage area of a base station. In order to ensure coverage The vehicle terminal of the domain allocates time-frequency resources reasonably, and the base station needs to obtain D2D resource information of the D2D terminal within a certain range outside the coverage area, and information such as location information of the D2D terminal, and this area is referred to as a “D2D resource information area”. Through the X2 interface, the base station exchanges information about the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal and the vehicle to the outside (Vehicle to X, V2X) communication.

For example, the D2D terminal is an in-vehicle D2D terminal, and the base station needs to obtain D2D resource information used by the in-vehicle D2D terminal in the D2D resource information area, and information such as location information and heading information of the in-vehicle D2D terminal.

V2X is the key technology for future intelligent transportation systems. It enables communication between the in-vehicle D2D terminal and the in-vehicle D2D terminal, the in-vehicle D2D terminal and the base station, and the base station and the base station. Thereby obtaining a series of traffic information such as real-time road conditions, road information, pedestrian information, etc., thereby improving driving safety, reducing congestion, improving traffic efficiency, and providing in-vehicle entertainment information.

Preferably, for a base station, the D2D resource information area of the base station refers to all areas outside the coverage area of the base station and the distance from the coverage area boundary of the base station is less than the minimum spatial reusable distance of the D2D resource. Certainly, the D2D resource information area of the base station may further include an area outside the coverage area of the base station, and a distance from a coverage area boundary of the base station is greater than a minimum spatial reusable distance of the D2D resource.

For example, as shown in FIG. 4, a schematic diagram of a first type of D2D resource information area provided by an embodiment of the present invention. In FIG. 4, only one cell is included in the coverage area of each base station in the cellular network, and the diameter of each cell is the minimum spatial reusable distance of the D2D resource. In FIG. 4, the coverage area of the intermediate base station has a total of six adjacent cells, and the six adjacent cells constitute a D2D resource information area of the base station.

For example, as shown in FIG. 5, a schematic diagram of a second D2D resource information area provided by an embodiment of the present invention is shown. In FIG. 5, the coverage area of each base station in the cellular network includes 7 cells, and the diameter of each cell is the minimum spatial reusable distance of the D2D resource. In FIG. 5, the coverage area of the intermediate base station has 12 adjacent cells, and the 12 adjacent cells constitute a D2D resource information area of the base station.

Referring to the technology of MS-Aloha (Mobile Slotted Aloha), the D2D terminal can multiplex D2D resources outside the three-hop distance, so the distance from the boundary of the D2D resource information area that is farthest from the boundary of the coverage area of the base station and the boundary of the coverage area of the base station is The size is at least equal to the three-hop distance outside the coverage area of the base station, or even further. Therefore, the distance between the D2D terminal that is the farthest from the base station and the distance from the D2D terminal that is farthest from the base station to the base station in the D2D terminal corresponding to the D2D terminal transmitted by the neighboring base station of the base station and the D2D resource allocation information of the D2D terminal received by the base station At least the minimum spatial reusable distance of the D2D resource. Optionally, in the embodiment of the present invention, the minimum spatial reusable distance of the D2D resource is a three-hop distance.

In general, a cell in a cellular network has a diameter approximately equal to the minimum spatial reusable distance of the D2D resource. If there is only one cell in the coverage area of a base station, the base station only needs to obtain the location information of the D2D terminal in the coverage area of the neighboring base station of the base station and the D2D resource allocation information of the D2D terminal; if there are multiple cells in the coverage area of one base station, the base station only The D2D terminal in the cell adjacent to the base station in the coverage area of the neighboring base station of the base station needs to be acquired. Location information, D2D resource allocation information of the D2D terminal.

If the diameter of one cell in the cellular network is much larger than the minimum spatial reusable distance of the D2D resource, only the location information of the D2D terminal within the spatial reusable distance of the D2D resource and the D2D resource allocation information of the D2D terminal may be exchanged. If the diameter of one cell in the cellular network is much smaller than the minimum spatial reusable distance of the D2D resource, at least the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal in the minimum spatial reusable distance of the D2D resource are acquired. The amount of information and complexity of interaction between base stations will increase significantly.

The base station does not send the location information of all the D2D terminals in the coverage area and the D2D resource allocation information of the D2D terminal to the neighboring base station of the base station. Preferably, the base station associates the coverage area of the base station with the base station. The location information of the D2D terminal whose distance of the base station coverage area boundary is smaller than the minimum spatial reusable distance of the D2D resource, and the D2D resource allocation information of the D2D terminal are sent to the neighboring base station.

As mentioned above, the spatial reusable distance of the D2D resource is generally the three-hop distance of the D2D terminal transmission capability.

After receiving the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, the base station can learn the D2D resource used by the D2D terminal in the cell around the coverage area of the base station, so the base station can also be based on the neighboring node. Determining, by the base station, the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, determining whether the D2D resource used by the D2D terminal in the coverage area of the base station corresponds to the location information and resource allocation information sent by the neighboring base station The D2D resource used by the D2D terminal collides with the resource, and if so, the D2D terminal re-allocates the D2D terminal that has a resource collision with the D2D terminal corresponding to the location information and the resource allocation information sent by the neighboring base station in the coverage of the base station. .

For example, the base station determines, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, that the D2D terminal has just entered the coverage area of the neighboring base station, and the D2D resource and the base station coverage area used by the D2D terminal. The D2D resources used by one D2D terminal are the same. In this case, the base station determines that the D2D resource used by the D2D terminal in the coverage area of the base station will collide with the resource. Therefore, the base station re-allocates the D2D resource for the D2D terminal that has the resource collision.

In the foregoing solution, the base station determines the allocated D2D resources that may collide by analyzing the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, and actively allocates the D2D resources to the D2D terminal, thereby achieving reasonable and high efficiency. The D2D resource is allocated for the D2D terminal.

The base station receives the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, and also needs to obtain the location information of the D2D terminal in the coverage area and the D2D resource allocation information of the D2D terminal, and the like. Thereby, it is possible to determine the state of the D2D terminal in the neighboring base station within its coverage area and outside its coverage area.

After the base station allocates D2D resources to the D2D terminals in its coverage area, it can determine which D2D terminals are allocated which D2D resources. However, the location of the D2D terminal is not fixed and changes at any time. The D2D terminal allocated with the D2D resource may leave the coverage area of the base station, or some D2D resources are allocated. The D2D terminal moves from the coverage area of other base stations to the coverage area of the base station. Therefore, the D2D resources used by the D2D terminals in the coverage area of the base station are not all allocated by the base station, so that the base station can determine the allocated D2D resources when the D2D resources are allocated to other D2D terminals, and the D2D terminals in the coverage area of the base station. The D2D resource allocation information used by it is sent to the base station corresponding to the cell in which it is located through the D2N link.

For a D2D terminal with a large mobile range, such as an in-vehicle D2D terminal, the in-vehicle D2D terminal may pass through a coverage area of a plurality of base stations during the mobile process, so it is necessary to consider the case where the D2D terminal switches the D2D link resource during the mobile process. The following describes the switching conditions of different D2D link resources:

In the first case, the D2D terminal moves between the cells in the coverage area of the base station, and when the D2N link resource is triggered, the D2D link resource does not need to be switched. For example, when the D2D terminal is an in-vehicle D2D terminal, when the in-vehicle D2D terminal is handed over in the base station, the base station has obtained complete information of the in-vehicle D2D terminal, and thus no additional processing is required.

In the second case, the D2D terminal moves between the coverage areas of the base station. At this time, the D2D terminal performs handover through the D2N link, and the D2D terminal continues to use the original D2D resource after moving to the coverage area of the target base station. In order to avoid information inconsistency, the D2D resource allocation information used by the D2D terminal should be included in the user context of the D2N link handover, thus ensuring that the D2D link resources of the D2D terminal are converted to be controlled by the target base station.

For example, the D2D terminal is an in-vehicle D2D terminal, and the in-vehicle D2D terminal moves from a coverage area of another base station to a coverage area of the base station. At this time, the D2D resource used by the in-vehicle D2D terminal does not change, but the in-vehicle D2D terminal needs to be The used D2D resource allocation information is sent to the base station.

The D2D terminal in the base station cover area can transmit the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal to the base station through the D2N link. For example, the D2D terminal in the base station cover area may send the location information of the D2D terminal, the D2D resource allocation information of the D2D terminal to the base station every fixed period, or the location information of the D2D terminal in the base station cover area in the D2D terminal, When the D2D resource allocation information of the D2D terminal changes, the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal are transmitted to the base station.

For example, the D2D terminal only has a location change in the coverage area of the base station. At this time, the location information of the D2D terminal sent by the D2D terminal to the base station may include only the latitude and longitude information of the D2D terminal.

For example, the D2D resource in the coverage area of the base station is changed by the D2D terminal. In this case, the D2D resource allocation information of the D2D terminal sent by the D2D terminal to the base station may include only the D2D resource used by the D2D terminal.

In step 302, after determining the allocated D2D resources, the base station may allocate D2D resources to the D2D terminals in the coverage area of the base station.

When the base station allocates D2D resources to the D2D terminal, the base station first selects an idle D2D resource. When there is no idle D2D resource, the D2D resource outside the minimum space reusable distance of the D2D resource is selected for multiplexing.

For example, when there is no idle D2D resource, the base station selects the D2D terminal transmission capability beyond the three-hop distance. D2D resources are multiplexed.

Optionally, the base station may adopt different D2D resource allocation policies according to the location of the D2D terminal from the base station. When the D2D resource is allocated to the D2D terminal located in the central area of the coverage area of the base station, the base station may not need to consider the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, but only in the edge area of the coverage area of the base station. When the D2D terminal allocates the D2D resource, the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal transmitted by the neighboring base station of the base station are considered.

At the same time, when receiving the D2D resources allocated by the base station, the D2D terminal should also detect the status of the D2D link. When a resource collision is detected, the D2D link collision feedback information should be reported to the base station through the D2N link. Specifically, the base station receives the D2D link collision feedback information sent by the D2D terminal, where the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision; the base station according to the D2D The link collision feedback information re-allocates the D2D resource for the D2D terminal that sends the D2D link collision feedback information.

In order to prevent the D2D terminal from occupying the D2D resource, the base station may also allocate the D2D resource to the D2D terminal, and may also indicate the allocation period of the D2D resource using the D2D resource, and the D2D terminal releases the D2D resource allocated by the base station when the D2D resource allocation period arrives. .

The entire flow of the above method will be described below by way of specific embodiments.

Embodiment 1

Referring to FIG. 4 and FIG. 4, only one cell is included in the coverage area of each base station in the cellular network, and the diameter of each cell is the minimum spatial reusable distance of the D2D resource. The base station corresponding to the cell in the middle of FIG. 4 receives the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal transmitted by the base station corresponding to the neighboring cell in the coverage area, where the D2D terminal is the in-vehicle D2D terminal.

As shown in FIG. 4, the D2D resource information area of the intermediate base station is composed of six cells adjacent to the base station.

In FIG. 4, the base station acquires the location information of the in-vehicle D2D terminal in the coverage area of the base station and the D2D resource allocation information of the in-vehicle D2D terminal through the D2N link, and the base station acquires the in-vehicle D2D terminal in each cell in the D2D resource allocation information area through the X2 interface. Location information, D2D resource allocation information of the vehicle D2D terminal. The base station may select an appropriate D2D resource when the D2D resource is allocated to the in-vehicle D2D terminal in the coverage area according to the acquired location information of the in-vehicle D2D terminal and the D2D resource allocation information of the in-vehicle D2D terminal, and avoid the in-vehicle D2D terminal in the D2D resource information area. The D2D resources used are the same.

The base station may also analyze, according to the acquired location information of the in-vehicle D2D terminal and the D2D resource allocation information of the in-vehicle D2D terminal, whether the allocated time-frequency resource may have a resource collision, and if the in-vehicle D2D terminal in the coverage area of the base station is determined, resources may occur. Collision, actively reassign D2D resources to it.

The base station may determine the allocated D2D resources according to the acquired location information of the in-vehicle D2D terminal and the D2D resource allocation information of the in-vehicle D2D terminal, thereby determining an unallocated, idle D2D resource. When the base station allocates D2D resources to the in-vehicle D2D terminals in its coverage area, the base station first selects idle D2D resources. When there is no free D2D When resources are used, D2D resources outside the three-hop distance are used for multiplexing.

Embodiment 2

Referring to FIG. 5 and FIG. 5, the coverage area of each base station in the cellular network includes 7 cells, and the diameter of each cell is the minimum spatial reusable distance of the D2D resource. The base station base station is responsible for managing and allocating D2D resources of the D2D terminal within its coverage area, where the D2D terminal is an in-vehicle D2D terminal.

As shown in FIG. 5, the D2D resource information area of the intermediate base station is composed of 12 cells adjacent to the boundary of the coverage area of the base station.

In FIG. 5, the base station acquires the location information of the D2D terminal of the in-vehicle D2D terminal and the D2D resource allocation information of the D2D terminal in the coverage area of the base station through the D2N link, and the base station acquires the in-vehicle in each cell in the D2D resource allocation information area through the X2 interface. Location information of the D2D terminal of the D2D terminal and D2D resource allocation information of the D2D terminal.

In order to save overhead, the base station determines that the in-vehicle D2D terminal in the coverage area of the base station meets one of the following conditions, and sends the location information of the in-vehicle D2D terminal and the D2D resource of the in-vehicle D2D terminal to the neighboring base station of the base station through the X2 interface. Assign information:

Condition 1. The moving distance of the vehicle D2D terminal exceeds the threshold;

For the D2D terminal whose moving distance exceeds the threshold, it is possible to transmit only the location information without transmitting the D2D resource allocation information of the in-vehicle D2D terminal. The transmitted location information of the in-vehicle D2D terminal includes one or more of the following parameters: latitude and longitude information of the in-vehicle D2D terminal; moving speed of the in-vehicle D2D terminal; moving acceleration of the in-vehicle D2D terminal; moving direction of the in-vehicle D2D terminal; and vehicle D2D The elevation of the terminal.

Condition 2: D2D resource allocation information used by the vehicle D2D terminal changes;

The terminal that changes the D2D resource allocation information may send only the D2D resource allocation information without transmitting the location information of the in-vehicle D2D terminal, and the transmitted D2D resource allocation information may include only the D2D resource used by the in-vehicle D2D terminal.

Condition 3: The coverage area of the vehicle D2D terminal leaving the base station;

For the D2D terminal leaving the coverage area of the base station, it is not necessary to transmit the location information and the D2D resource allocation information, but only the identifier of the in-vehicle D2D terminal is sent out.

Condition 4: The in-vehicle D2D terminal enters a coverage area of the base station;

For the D2D terminal entering the coverage area of the base station, location information and D2D resource allocation information may be transmitted. The location information of the transmitted vehicle D2D terminal includes one or more of the following parameters: latitude and longitude information of the vehicle D2D terminal; moving speed of the vehicle D2D terminal; moving acceleration of the vehicle D2D terminal; moving direction of the vehicle D2D terminal; The elevation of the onboard D2D terminal; the transmitted D2D resource allocation information of the in-vehicle D2D terminal may include one or more of the following parameters: a D2D resource used by the in-vehicle D2D terminal; and a distribution period of the D2D resource used by the in-vehicle D2D terminal.

For the foregoing method flow, the embodiment of the present invention further provides a base station, and the specific content of the base station may be implemented by referring to the foregoing method, and details are not described herein again.

As shown in FIG. 6, a base station provided by an embodiment of the present invention includes:

The first transceiver unit 601 is configured to receive location information of the device to the device D2D terminal sent by the neighboring base station of the base station, and D2D resource allocation information of the D2D terminal;

The D2D resource allocation unit 602 is configured to: according to the location information of the D2D terminal sent by the neighboring base station, the D2D resource allocation information of the D2D terminal, and the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. Allocating D2D resources to D2D terminals in the coverage area of the base station.

Preferably, the first transceiver unit 601 is further configured to:

And transmitting, to the neighboring base station of the base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal.

Preferably, the first transceiver unit 601 is specifically configured to:

Determining, when the D2D terminal in the coverage area of the base station meets one of the following conditions, transmitting, to the neighboring base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal:

The moving distance of the D2D terminal exceeds a threshold;

The D2D resource allocation information used by the D2D terminal changes;

The D2D terminal leaves the coverage area of the base station;

The D2D terminal enters a coverage area of the base station.

Preferably, the first transceiver unit 601 is specifically configured to:

Transmitting, to the neighboring base station, location information of a D2D terminal that is smaller than a minimum spatial reusable distance of a D2D resource in a coverage area of the base station from a neighboring base station coverage area of the base station, and D2D resource allocation information of the D2D terminal .

Preferably, the second transceiver unit 603 is further configured to:

Receiving the D2D link collision feedback information sent by the D2D terminal, where the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision;

The D2D resource allocation unit 602 is specifically configured to:

And allocating D2D resources to the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information.

Preferably, the D2D resource allocation unit 602 is further configured to:

Determining, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, the D2D resource used by the D2D terminal in the coverage area of the base station and the location information and resource allocation sent by the neighboring base station The D2D resource used by the D2D terminal corresponding to the information collides with the resource, and if so, the D2D terminal corresponding to the location information and the resource allocation information sent by the neighboring base station in the coverage of the base station is generated. The source collision D2D terminal reassigns the D2D resources.

Preferably, the base station receives location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station.

Preferably, the location information of the D2D terminal includes one or any combination of the following parameters:

Longitude and latitude information of the D2D terminal;

The moving speed of the D2D terminal;

The movement acceleration of the D2D terminal;

The moving direction of the D2D terminal;

The elevation of the D2D terminal;

The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters:

D2D resources used by D2D terminals;

The allocation period of the D2D resources used by the D2D terminal.

Preferably, the D2D terminal is an in-vehicle D2D terminal.

As shown in Figure 7, another base station provided by the embodiment of the present invention includes: a processor 701, a memory 702, and a transceiver 703;

The transceiver 703 is configured to receive location information of a device to a device D2D terminal sent by a neighboring base station of the base station, and D2D resource allocation information of the D2D terminal;

The processor 701 is configured to read a program in the memory 702, and perform the following processes: performing location information of a D2D terminal, D2D resource allocation information of a D2D terminal, and coverage of the base station according to the neighboring base station. The location information of the D2D terminal in the area and the D2D resource allocation information of the D2D terminal allocate D2D resources to the D2D terminal in the coverage area of the base station.

Preferably, the transceiver 703 is specifically configured to:

And transmitting, to the neighboring base station of the base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal.

Preferably, the transceiver 703 is specifically configured to:

Determining, when the D2D terminal in the coverage area of the base station meets one of the following conditions, transmitting, to the neighboring base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal:

The moving distance of the D2D terminal exceeds a threshold;

The D2D resource allocation information used by the D2D terminal changes;

The D2D terminal leaves the coverage area of the base station;

The D2D terminal enters a coverage area of the base station.

Preferably, the transceiver 703 is specifically configured to:

And the distance between the coverage area of the base station and the neighboring base station coverage area of the base station is smaller than the D2D resource. The location information of the D2D terminal of the minimum spatial reusable distance and the D2D resource allocation information of the D2D terminal are transmitted to the neighboring base station.

Preferably, the transceiver 703 is specifically configured to:

Receiving the D2D link collision feedback information sent by the D2D terminal, where the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision;

The processor 701 is specifically configured to:

And allocating D2D resources to the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information.

Preferably, the processor 701 is further configured to:

Determining, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, the D2D resource used by the D2D terminal in the coverage area of the base station and the location information and resource allocation sent by the neighboring base station The D2D resource used by the D2D terminal corresponding to the information collides with the resource, and if so, the D2D terminal that collides with the D2D terminal corresponding to the location information and the resource allocation information sent by the neighboring base station in the coverage of the base station Reassign D2D resources.

Preferably, the base station receives location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station.

Preferably, the location information of the D2D terminal includes one or any combination of the following parameters:

Longitude and latitude information of the D2D terminal;

The moving speed of the D2D terminal;

The movement acceleration of the D2D terminal;

The moving direction of the D2D terminal;

The elevation of the D2D terminal;

The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters:

D2D resources used by D2D terminals;

The allocation period of the D2D resources used by the D2D terminal.

Preferably, the D2D terminal is an in-vehicle D2D terminal.

In FIG. 7, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 701 and various circuits of memory represented by memory 702. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 703 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 can store data used by the processor 701 in performing operations.

In summary, according to the method and the base station provided by the embodiment of the present invention, after receiving the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, the base station is a D2D terminal in the coverage area of the base station. Assign D2D resources. The D2D resource allocation is performed by the base station according to the location information of the D2D terminal, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. Therefore, the base station can allocate D2D resources more reasonably, reduce the probability of resource collision of the allocated D2D resources, reduce the switching of the D2D resources, and complete the D2D resource allocation reasonably and efficiently.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the present invention.

The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (18)

A device-to-device D2D resource allocation method, the method comprising: Receiving, by the base station, location information of the D2D terminal sent by the neighboring base station of the base station, and D2D resource allocation information of the D2D terminal; The base station is configured according to the location information of the D2D terminal, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal according to the neighboring base station. The D2D terminal in the coverage area of the base station allocates D2D resources. The method of claim 1 further comprising: The base station sends the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal to the neighboring base station of the base station. The method according to claim 2, wherein the base station sends the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal to the neighboring base station of the base station, including: When determining, by the base station, that the D2D terminal in the coverage area of the base station meets one of the following conditions, the base station sends location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation of the D2D terminal to the neighboring base station. information: The moving distance of the D2D terminal exceeds a threshold; The D2D resource allocation information used by the D2D terminal changes; The D2D terminal leaves the coverage area of the base station; The D2D terminal enters a coverage area of the base station. The method according to claim 2, wherein the base station sets the distance between the coverage area of the base station and the neighboring base station coverage area of the base station to be less than the minimum spatial reusable distance of the D2D resource. The location information and the D2D resource allocation information of the D2D terminal are transmitted to the neighboring base station. The method according to claim 1, wherein after the base station allocates D2D resources to the D2D terminal in the coverage area of the base station, the method further includes: The base station receives the D2D link collision feedback information sent by the D2D terminal, and the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision; The base station re-allocates D2D resources for the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information. The method according to claim 1, wherein the base station, after receiving the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal sent by the neighboring base station of the base station, further includes: Determining, by the base station, the D2D resource used by the D2D terminal in the coverage area of the base station, and transmitting the D2D resource used by the D2D terminal in the coverage area of the base station, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal. When the D2D resource used by the D2D terminal corresponding to the location information and the resource allocation information collides with the resource, the resource collision occurs in the D2D terminal corresponding to the location information and the resource allocation information sent by the neighboring base station in the coverage of the base station. The D2D terminal reassigns D2D resources. The method according to claim 1, wherein the base station receives location information and D2D resource allocation information of the D2D terminal sent by the neighboring base station by using an X2 interface with the neighboring base station. The method according to any one of claims 1 to 7, wherein the location information of the D2D terminal comprises one or any combination of the following parameters: Longitude and latitude information of the D2D terminal; The moving speed of the D2D terminal; The movement acceleration of the D2D terminal; The moving direction of the D2D terminal; The elevation of the D2D terminal; The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters: D2D resources used by D2D terminals; The allocation period of the D2D resources used by the D2D terminal. The method according to any one of claims 1 to 7, wherein the D2D terminal is an in-vehicle D2D terminal. A base station, comprising: a first transceiver unit, configured to receive location information of a device to a device D2D terminal sent by a neighboring base station of the base station, and D2D resource allocation information of the D2D terminal; The D2D resource allocation unit is configured to: according to the location information of the D2D terminal sent by the neighboring base station, the D2D resource allocation information of the D2D terminal, the location information of the D2D terminal in the coverage area of the base station, and the D2D resource allocation information of the D2D terminal. The D2D terminal in the coverage area of the base station allocates D2D resources. The base station according to claim 10, wherein the first transceiver unit is further configured to: And transmitting, to the neighboring base station of the base station, location information of the D2D terminal in the coverage area of the base station, and D2D resource allocation information of the D2D terminal. The base station according to claim 11, wherein the first transceiver unit is specifically configured to: When it is determined that the D2D terminal in the coverage area of the base station meets one of the following conditions, the location information of the D2D terminal in the coverage area of the base station and the D2D resource allocation information of the D2D terminal are sent to the neighboring base station: The moving distance of the D2D terminal exceeds a threshold; The D2D resource allocation information used by the D2D terminal changes; The D2D terminal leaves the coverage area of the base station; The D2D terminal enters a coverage area of the base station. The base station according to claim 11, wherein the first transceiver unit is specifically configured to: Transmitting, to the neighboring base station, location information of a D2D terminal that is smaller than a minimum spatial reusable distance of a D2D resource in a coverage area of the base station from a neighboring base station coverage area of the base station, and D2D resource allocation information of the D2D terminal . The base station according to claim 10, further comprising a second transceiver unit; The second transceiver unit is configured to: Receiving the D2D link collision feedback information sent by the D2D terminal, where the D2D link collision feedback information is sent to the base station after the D2D terminal detects that the D2D link has a resource collision; The D2D resource allocation unit is specifically configured to: And allocating D2D resources to the D2D terminal that sends the D2D link collision feedback information according to the D2D link collision feedback information. The base station according to claim 10, wherein the D2D resource allocation unit is further configured to: Determining, according to the location information of the D2D terminal and the D2D resource allocation information of the D2D terminal, the D2D resource used by the D2D terminal in the coverage area of the base station, and the location information and resources sent by the neighboring base station When a resource collision occurs in the D2D resource used by the D2D terminal corresponding to the allocation information, the D2D terminal that has a resource collision with the D2D terminal corresponding to the location information and the resource allocation information transmitted by the neighboring base station in the coverage of the base station is re-established. Assign D2D resources. The base station according to claim 10, wherein the base station receives location information and D2D resource allocation information of the D2D terminal transmitted by the neighboring base station by using an X2 interface with the neighboring base station. The base station according to any one of claims 10 to 16, wherein the location information of the D2D terminal comprises one or any combination of the following parameters: Longitude and latitude information of the D2D terminal; The moving speed of the D2D terminal; The movement acceleration of the D2D terminal; The moving direction of the D2D terminal; The elevation of the D2D terminal; The D2D resource allocation information of the D2D terminal includes one or any combination of the following parameters: D2D resources used by D2D terminals; The allocation period of the D2D resources used by the D2D terminal. The base station according to any one of claims 10 to 16, wherein the D2D terminal is an in-vehicle D2D terminal.

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