WO2023124731A1

WO2023124731A1 - Resource allocation method and apparatus for d2d communication, medium, and program product

Info

Publication number: WO2023124731A1
Application number: PCT/CN2022/135612
Authority: WO
Inventors: 田雷
Original assignee: 华为技术有限公司
Priority date: 2021-12-31
Filing date: 2022-11-30
Publication date: 2023-07-06
Also published as: CN116437480A

Abstract

The present application discloses a resource allocation method and apparatus for D2D communication, a medium, and a program product. The method comprises: when first user equipment accesses second user equipment, the second user equipment receives a link establishment request message from the first user equipment, the link establishment request message comprising a first channel listening result of the first user equipment; the second user equipment sends a link establishment response to the first user equipment, the link establishment response comprising first service resource information, which is determined according to the first channel listening result and a second channel listening result of the second user equipment; and the second user equipment performs service data transmission to the first user equipment at a service resource location that is indicated by the first service resource information. By using the solution of the present application, a service resource can be accurately determined, service data transmission can be reliably achieved, and service resource conflict during simultaneous access by a plurality of user equipment can be avoided.

Description

D2D communication resource allocation method and device, medium, and program product

This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on December 31, 2021, the application number is 202111669745.3, and the invention title is "Resource allocation method and device, medium, and program product for D2D communication", all of which The contents are incorporated by reference in this application.

technical field

The present application relates to the field of communication technologies, and in particular to a resource allocation method, device, medium, and program product for device-to-device (device-to-device, D2D) communication.

Background technique

A central network includes a management device and several member devices. As shown in Figure 1, the flow diagram of member devices accessing a central network, when a member device needs to join a central network, it needs to first search for a management device and send a message 1 (message1, MSG1). After receiving the MSG1, the management device will send a message 2 (message2, MSG2) to the member devices, and allocate access resource candidate lists to the member devices. The member device sends a message 3 (message3, MSG3) after receiving the MSG2 sent by the management device. After receiving the MSG3 of the member device, the management device will authenticate the member device, and send the authentication result to the member device through message 4 (message4, MSG4). If the authentication is passed, service resources are allocated to the member equipment, and service data can only be sent when the member equipment has service resources.

The cellular network allocates service resources to the user equipment by indicating the service resources in downlink control information (DCI), and the user equipment can send data only after receiving the DCI from the access network device. Every time the user equipment sends data, the access network device needs to issue DCI to allocate service resources. When this mechanism is used in a central network, it will increase the power consumption of the user equipment and the consumption of air interface resources.

Long term evolution (long term evolution, LTE) vehicle wireless communication technology (vehicle to X, V2X) interception and resource reservation is an autonomous resource allocation scheme for user equipment based on a decentralized network. Before each user equipment needs to send service data, it first listens for a period of time, and excludes the resources already used by other user equipment according to the intercepted sidelink control information (SCI) and signal energy, and then Randomly select from the remaining resource sets to obtain the service resources of the user equipment. As shown in Figure 2, the schematic diagram of LTE V2X interception and resource reservation, in the resource interception window, before user equipment 2 sends service data, the resources already used by user equipment 1 are excluded, and random selection is performed in the remaining resource set to obtain The service resources of the user equipment; similarly, before the user equipment 3 sends the service data, the resources already used by the user equipment 1 and the user equipment 2 are excluded, and the service resources of the user equipment are obtained by randomly selecting from the remaining resource set. However, since the user equipment first excludes the resources already occupied by other user equipments when performing resource selection, and then randomly selects the remaining idle resources, when multiple user equipments perform resource selection at the same time, there will be a certain probability that the same resources will be selected. business resources.

In particular, as shown in FIG. 3 , which is a schematic diagram of a hidden user equipment, there is a problem of a hidden user equipment when the user equipment performs autonomous resource selection. User equipment 2 and user equipment 3 need to send data at the same time. Due to the long distance between user equipment 2 and user equipment 3, user equipment 2 and user equipment 3 cannot detect each other. The service selected by user equipment 2 and user equipment 3 The resource may be the same resource, so the user equipment 1 located between the user equipment 2 and the user equipment 3 cannot receive the data of the user equipment 2 and the user equipment 3 normally.

In addition, the D2D non-network coverage resource selection defined by the ^3rd generation partnership project (3GPP) is based on random resource selection, and the user equipment randomly selects transmission resources for transmission when it needs to transmit data. However, when multiple user equipments transmit data at the same time, transmission resource conflicts may occur, and the reliability of resource allocation cannot be guaranteed.

In view of this, for a centralized network, how to reliably allocate resources for D2D communication and avoid service resource conflicts when multiple user equipments access at the same time is a problem to be solved in this application.

Contents of the invention

The present application provides a D2D communication resource allocation method, device, medium, and program product, so as to realize reliable D2D communication resource allocation and avoid service resource conflicts when multiple user equipments access at the same time.

In a first aspect, a resource allocation method for D2D communication is provided, the method includes: when a first user equipment accesses a second user equipment, the second user equipment receives a link establishment link from the first user equipment request message, the link establishment request message includes the first channel monitoring result of the first user equipment; the second user equipment sends a link establishment response to the first user equipment, and the link establishment response includes the first Service resource information, the first service resource information is determined according to the first channel detection result and the second channel detection result of the second user equipment itself; and the second user equipment in the first The service resource location indicated by the service resource information and the first user equipment perform service data transmission. In this aspect, the second user equipment determines the first service resource information according to the first channel sensing result and the second channel sensing result of the second user equipment itself by receiving the first channel sensing result of the first user equipment, The first user equipment transmits service data according to the first service resource information, so that service resources can be accurately determined, so that the first user equipment can reliably transmit service data, and avoid service failures when multiple user equipments access at the same time. Resource conflict.

In a possible implementation, the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource cycle, the number of service resources allocated in each cycle, and the number of service resources allocated in each cycle. The transmission interval between business resources and the number of reservations of business resources. In this implementation, the service resource information reserved by the second user equipment for the first user equipment is accurately described, so that the first user equipment can accurately transmit service data according to the first service resource information.

In another possible implementation, the first channel interception result is that the first user equipment intercepts a channel between at least one third user equipment within the communication range of the first user equipment result; and the second channel listening result is a result of the second user equipment listening to a channel between at least one fourth user equipment within communication range with the second user equipment. In this implementation, the communication range of the first user equipment may be the same as or different from the communication range of the second user equipment, so as to avoid the situation that the channel between the hidden user equipment and the hidden user equipment cannot be detected, resulting in a conflict of allocated service resources.

In yet another possible implementation, the method further includes: the second user equipment receiving a third channel sensing result from at least one fifth user equipment, the third channel sensing result being the at least one A result of the fifth user equipment intercepting a channel with at least one sixth user equipment within the communication range of the at least one fifth user equipment; wherein, the first service resource information is based on the second channel determined by the listening result, the first channel listening result, and the third channel listening result. In this implementation, the first service resource information may be further determined according to the channel sensing result of the second user equipment and the channel sensing result of at least one fifth user equipment. The at least one fifth user equipment belongs to other user equipments except the first user equipment in the network managed by the second user equipment. At least one fifth user equipment can perform channel monitoring within its communication range, and the communication range of at least one fifth user equipment can be the same as or different from that of the first user equipment and the second user equipment, so that interception can be avoided The channel condition between the invisible user equipment and the hidden user equipment leads to the conflict of allocated access resources.

In yet another possible implementation, the method further includes: the second user equipment detects the channel strength of any subband of the data channel on at least one time domain resource position, and obtains the second channel sensed Listen to the result; the second user equipment detects that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and updates the any time domain resource position as the channel is busy; and The second user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to a second threshold value for a set number of times, and updates the any time domain resource position as the channel idle, wherein the second threshold is smaller than the first threshold. In this implementation, the second user equipment can update the second channel sensing result in real time according to the current channel sensing result, so as to accurately allocate service resources.

In yet another possible implementation, the second user equipment senses that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold, and updates the any time domain resource The position is that the channel is busy, including: the second user equipment senses that the signal strength of any subband of the data channel on any time domain resource position r is greater than or equal to the first threshold value, and sets the second resource bitmap The i-th bit in is set to the first value, where i=r%q, wherein the second resource bitmap includes q bits, and % represents a remainder operation.

In yet another possible implementation, the second user equipment detects continuously that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold for a set number of times, and updates Said any time-domain resource position is a channel idle, including: said second user equipment continuously senses any subband of the data channel on the s time-domain resource positions corresponding to the i-th bit for the set number of times The signal strength of is less than or equal to the second threshold value, and the ith bit in the second resource bitmap is set to a second value.

In yet another possible implementation, the first channel sensing result includes the first resource bitmap or first idle time domain resource information; the second channel sensing result includes the second resource bitmap or the first 2. Free time domain resource information.

In yet another possible implementation, the method further includes: when the second user equipment detects that the number of service data transmissions performed by the first user equipment using service resources reaches the reserved number of service resources, the The second user equipment sends second service resource information. In this implementation, the second user equipment initially reserves service resources for a certain number of times for the first user equipment. The user equipment allocates service resources to the first user equipment again, and the second service resource information may be completely the same, or partly the same, or completely different from the first service resource information.

In a second aspect, a resource allocation method for D2D communication is provided, the method comprising: when a first user equipment accesses a second user equipment, the first user equipment sends a link establishment request to the second user equipment message, the link establishment request message includes the first channel monitoring result of the first user equipment; the first user equipment receives a link establishment response from the second user equipment, and the link establishment response includes the first Service resource information, the first service resource information is determined according to the first channel detection result and the second channel detection result of the second user equipment itself; and the first user equipment in the first A service resource location indicated by the service resource information transmits service data. In this aspect, the first user equipment receives the first service resource information sent by the second user equipment, and the first service resource information is the first channel detection result of the second user equipment and the second channel of the second user equipment itself. If the interception result is determined, the first user equipment transmits service data according to the first service resource information, so that the first user equipment can reliably transmit service data and avoid service resource conflicts when multiple user equipments access at the same time .

In a possible implementation, the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource cycle, the number of service resources allocated in each cycle, and the number of service resources allocated in each cycle. The transmission interval between business resources and the number of reservations of business resources.

In another possible implementation, the first channel interception result is that the first user equipment intercepts a channel between at least one third user equipment within the communication range of the first user equipment Result; the second channel listening result is a result of the second user equipment listening to a channel between at least one fourth user equipment within the communication range of the second user equipment.

In another possible implementation, the method further includes: the first user equipment detects the channel strength of any subband of the data channel on at least one time domain resource position, and obtains the first channel sensed Listen to the result; the first user equipment detects that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and updates the any time domain resource position as the channel is busy; and The first user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and updates the any time domain resource position as the channel idle, wherein the second threshold is smaller than the first threshold.

In yet another possible implementation, the first user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to the first threshold, and updates the any time domain resource The position is that the channel is busy, including: the first user equipment senses that the signal strength of any subband of the data channel on any time domain resource position n is greater than or equal to the first threshold value, and sets the first resource bitmap The jth bit in is set to the first value, where j=n%p, wherein the resource bitmap includes p bits, and % represents a remainder operation.

In yet another possible implementation, the first user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold for a set number of times, and updates Said any time-domain resource position is a channel idle, including: said first user equipment continuously detects any sub-band of a data channel on m time-domain resource positions corresponding to said j-th bit for said set number of times The signal strength of is less than or equal to a second threshold value, and the jth bit in the second resource bitmap is set to a second value.

In yet another possible implementation, the first channel sensing result includes the first resource bitmap or the first idle time domain resource information; the second channel sensing result includes the second resource bitmap or the first 2. Free time domain resource information.

In yet another possible implementation, the method further includes: when the number of service data transmissions performed by the first user equipment using service resources reaches the reserved number of service resources, receiving a message from the second user equipment Second business resource information.

In a third aspect, a resource allocation device for D2D communication is provided. The resource allocation device for D2D communication may implement the method in the first aspect above. For example, the resource allocation device for D2D communication may be a chip or a terminal. The above method can be realized by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the apparatus includes: a transceiver unit; wherein: the transceiver unit is configured to receive a link establishment request from the first user equipment when the first user equipment accesses the apparatus message, the link establishment request message includes the first channel monitoring result of the first user equipment; the transceiver unit is further configured to send a link establishment response to the first user equipment, and the link establishment response includes the first Service resource information, the first service resource information is determined according to the first channel detection result and the second channel detection result of the device itself; and the transceiver unit is further configured to The service resource location indicated by the service resource information and the first user equipment perform service data transmission.

Optionally, the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource period, the number of service resources allocated in each period, and the number of service resources allocated in each period. The interval between transmissions and the number of reservations of business resources.

Optionally, the first channel listening result is a result of the first user equipment listening to a channel between at least one third user equipment within a communication range with the first user equipment; the first The second channel listening result is a result of the apparatus listening to a channel with at least one fourth user equipment within a communication range of the apparatus.

Optionally, the transceiving unit is further configured to receive a third channel listening result from at least one fifth user equipment, where the third channel listening result is a pair of the at least one fifth user equipment and the at least one An interception result of a channel between at least one sixth user equipment within the communication range of a fifth user equipment; wherein, the first service resource information is based on the second channel interception result, the first channel determined by the listening result and the third channel listening result.

Optionally, the device further includes: a processing unit; wherein: the processing unit is configured to detect the channel strength of any subband of the data channel on at least one time domain resource position, and obtain the second channel Listening result: the processing unit is also configured to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel busy; and the processing unit is also configured to continuously detect that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and update the any time domain The domain resource location is an idle channel, wherein the second threshold is smaller than the first threshold.

Optionally, the processing unit is further configured to detect that the signal strength of any subband of the data channel on any time-domain resource position r is greater than or equal to the first threshold value, and put the second resource bitmap The i-th bit is set as the first value, where i=r%q, wherein the second resource bitmap includes q bits, and % represents a remainder operation.

Optionally, the processing unit is further configured to continuously detect that the signal strength of any subband of the data channel at the s time-domain resource positions corresponding to the i-th bit for the set number of times is less than or equal to the set the second threshold value, and set the ith bit in the second resource bitmap to a second value.

Optionally, the first channel sensing result includes first resource bitmap or first idle time domain resource information; the second channel sensing result includes the second resource bitmap or second idle time domain resource information information.

Optionally, the transceiving unit is further configured to send second service resource information when detecting that the number of service data transmissions performed by the device using service resources reaches the number of service resource reservations.

In another possible implementation manner, the device for allocating resources for D2D communication is used to execute the method in the above first aspect and various possible implementations thereof.

In a fourth aspect, a resource allocation device for D2D communication is provided. The resource allocation device for D2D communication may implement the method in the second aspect above. For example, the resource allocation device for D2D communication may be a chip or a terminal. The above method can be realized by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the apparatus includes: a transceiver unit; wherein: the transceiver unit is configured to send a link establishment request message to the second user equipment when the apparatus accesses the second user equipment, The link establishment request message includes the first channel monitoring result of the device; the transceiver unit is further configured to receive a link establishment response from the second user equipment, the link establishment response including first service resource information , the first service resource information is determined according to the first channel sensing result and the second channel sensing result of the second user equipment itself; and the transceiving unit is further configured to, in the first The service resource location indicated by the service resource information transmits service data.

Optionally, the first channel listening result is a result of the device listening to a channel with at least one third user equipment within the communication range of the device; the second channel listening result is An interception result of the channel between the second user equipment and at least one fourth user equipment within the communication range of the second user equipment.

Optionally, the device further includes: a processing unit; wherein: the processing unit is configured to detect the channel strength of any subband of the data channel on at least one time domain resource position, and obtain the first channel Listening result: the processing unit is also configured to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel busy; and the processing unit is also configured to continuously detect that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and update the any time domain The domain resource location is an idle channel, wherein the second threshold is smaller than the first threshold.

Optionally, the processing unit is further configured to detect that the signal strength of any subband of the data channel at any time-domain resource position n is greater than or equal to the first threshold value, and put the first resource bitmap The jth bit is set as the first value, where j=n%p, wherein the resource bitmap includes p bits, and % represents a remainder operation.

Optionally, the processing unit is further configured to continuously detect that the signal strength of any subband of the data channel at the m time-domain resource positions corresponding to the j-th bit for the set number of times is less than or equal to the first Two threshold values, setting the jth bit in the second resource bitmap as a second value.

Optionally, the first channel sensing result includes the first resource bitmap or first idle time domain resource information; the second channel sensing result includes a second resource bitmap or second idle time domain resource information information.

Optionally, the transceiving unit is further configured to receive second service resource information from the second user equipment when the number of service data transmissions using service resources reaches the number of service resource reservations.

In another possible implementation manner, the device for allocating resources for D2D communication is used to execute the method in the above second aspect and various possible implementations thereof.

In yet another possible implementation manner, the resource allocation device for D2D communication in the above third aspect or the fourth aspect includes a processor coupled to a memory; the processor is configured to support the device to perform the above D2D communication The corresponding function in the resource allocation method. The memory is used to couple with the processor, which holds the necessary computer programs (or computer-executable instructions) and/or data of the device. Optionally, the resource allocation device for D2D communication may further include a communication interface for supporting communication between the device and other network elements, such as sending or receiving data and/or signals. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module or other types of communication interfaces. Optionally, the memory may be located inside the resource allocation device for D2D communication and integrated with the processor; it may also be located outside the resource allocation device for D2D communication.

In yet another possible implementation manner, the resource allocation device for D2D communication in the third aspect or the fourth aspect includes a processor and a transceiver device, the processor is coupled to the transceiver device, and the processor is configured to execute A computer program or instruction to control the transceiver device to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or executing code instructions. Wherein, the transceiver device may be a transceiver, a transceiver circuit or an input-output interface, which is used to receive signals from resource allocation devices for D2D communication other than the resource allocation device for D2D communication and transmit them to the processor or Sending the signal from the processor to another resource allocation device for D2D communication other than the resource allocation device for D2D communication. When the resource allocation device for D2D communication is a chip, the transceiver device is a transceiver circuit or an input/output interface.

When the resource allocation device for D2D communication in the above third or fourth aspect is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the resource allocation device for D2D communication is a terminal, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

In the fifth aspect, a communication system is provided, the communication system includes a resource allocation device for implementing the D2D communication according to any one of the third aspect or the third aspect, and at least one resource allocation device according to the fourth aspect or the fourth aspect Any resource allocation device for implementing the D2D communication.

A sixth aspect provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the program or instruction is executed by a processor, the method described in the first aspect or any one of the first aspect is implemented be executed, or to implement the method described in the second aspect or any one of the implementations of the second aspect is executed.

In a seventh aspect, there is provided a computer program product, which, when executed on a computing device, causes the method described in any one of the first aspect or the first aspect to be executed, or the method described in the second aspect or the second The method described in any implementation of the aspect is performed.

Description of drawings

FIG. 1 is a schematic diagram of the flow of member devices accessing a centralized network;

Figure 2 is a schematic diagram of LTE V2X interception and resource reservation;

FIG. 3 is a schematic diagram of a hidden user equipment;

FIG. 4 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a resource allocation method for D2D communication provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of another D2D communication resource allocation method provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of at least one first idle time domain resource indicated by the first idle time domain resource information in the example of the present application;

FIG. 8 is a schematic structural diagram of a resource allocation device for D2D communication provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another D2D communication resource allocation device provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

This application proposes a centralized communication system architecture without cellular network coverage. As shown in FIG. 4 , which is a schematic structural diagram of a communication system provided by the present application, the communication system 4000 is located in a first network, and the communication system 4000/first network includes a second user equipment (user equipment, UE) 401 and The first user equipment 402 . The communication system 4000 may further include at least one fifth user equipment 403 (three fifth user equipments and the connections between the three fifth user equipments and the first user equipment and the second user equipment are illustrated by dotted lines in the figure, this The application does not limit the number of the fifth user equipment, which may be a non-negative integer). Wherein, the second user equipment 401 is the center of the first network and is responsible for establishing and managing the network, so it can also be called a management equipment. Each central network has only one management device, but the management device can be changed. After the first user device 402 and at least one fifth user device 403 are synchronized to the second user device 401, they become member devices of the management device. The first user equipment 402 needs to be synchronized with the second user equipment 401 and access the network before it can communicate with other member equipment. A central network can have multiple member devices.

Among them, the second user equipment 401: is responsible for sending synchronous information in the first network, member device access management and device identification allocation, member list maintenance, communication resource allocation and recycling in the first network, message transfer in the first network, inter-network Identity conflict detection and update etc.

The first user equipment 402: synchronizes with the management equipment, and after accessing the first network created by the management equipment, periodically sends its own status through heartbeat messages. The first user equipment 402 may communicate with any member equipment in the first network, and may also select some member equipment to form a multicast group for communication.

The second user equipment 401, the first user equipment 402, and at least one fifth user equipment 403 may be D2D devices. Exemplarily, a D2D device may refer to a terminal in D2D communication. The terminal is a node with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water, such as on ships, etc.; it can also be deployed in the air, such as aircraft, wireless Man-machines, balloons and satellites, etc. D2D devices can be mobile phone, tablet computer (pad), computer with wireless transceiver function, terminal in vehicle to everything (V2X), virtual reality (virtual reality, VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, smart grid Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc. The embodiments of the present application do not limit the application scenarios. A terminal may sometimes also be referred to as user equipment (user equipment, UE), access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, wireless communication equipment, UE proxy or UE device, etc.

In view of the background art, when allocating service resources to multiple user equipments, there may be a resource conflict problem. This application provides a resource allocation scheme for D2D communication. The second user equipment obtains the first channel detection result of the first user equipment, and according to the first channel detection result and the second channel of the second user equipment itself The interception result determines the service resource information, and the first user equipment transmits the service data according to the service resource location indicated by the service resource information. In this way, service resources can be accurately determined, service data can be transmitted reliably, and service resource conflicts can be avoided when multiple user equipments access at the same time.

This solution can also be further applied to the cellular network. For the scenario where multiple user equipments access the base station at the same time in the cellular network, the solution of this application can be used to solve the problem of service resource conflict among multiple user equipments.

Based on the architecture of the communication system shown in FIG. 4, the resource allocation scheme for D2D communication provided by the embodiment of the present application is described in detail below:

As shown in FIG. 5, it is a schematic flowchart of a resource allocation method for D2D communication provided by the embodiment of the present application, and the method may include the following steps:

S501. When the first user equipment accesses the second user equipment, the first user equipment sends a link establishment request message to the second user equipment. The link establishment request message includes the first channel monitoring result of the first user equipment.

Correspondingly, the second user equipment receives the link establishment request message.

For a network with a center, first select a user equipment as the management device, for example, select the second user equipment as the management device in this embodiment. The management device provides the synchronization source. The other user equipments perform synchronous discovery with the synchronization signal of the second user equipment as the target, and perform random access processing after the synchronous discovery is completed, forming a centered network. This embodiment is described by taking the first user equipment randomly accessing the centered network as an example.

When the first user equipment needs to join the centered network, it needs to first search for the synchronization signal broadcast by the second user equipment. After searching for the synchronization signal, the first user equipment sends an access request to the second user equipment. The access request is used to request access to the network. The access request may be called a random access request, a random access preamble, a preamble, message 1, and so on. The second user equipment receives the access request.

Exemplarily, multiple first user equipments may access the network at the same time. The second user equipment receives the access requests of the multiple first user equipments.

After receiving the access request sent by the first user equipment, the second user equipment sends an access response to the first user equipment. The access response is a response to the above access request. The access response may be called a random access response (random access response, RAR), message 2, and so on. The first user equipment receives the access response.

After receiving the foregoing access response, the first user equipment sends a link establishment request message to the second user equipment. The link establishment request message is used to request establishment of a link with the network or the second user equipment. The link establishment request message may also be referred to as message 3 .

In this embodiment, when the first user equipment searches for the synchronization signal broadcast by the second user equipment, it performs channel detection to obtain the first channel detection result. Exemplarily, the first user equipment monitors a channel between at least one third user equipment within its communication range. The first channel interception result is an interception result of the channel between the first user equipment and at least one third user equipment within the communication range of the first user equipment. The link establishment request message includes the first channel monitoring result of the first user equipment.

S502. The second user equipment sends a link establishment response to the first user equipment.

Correspondingly, the first user equipment receives the link establishment response.

After the centered network is established, the second user equipment can perform channel monitoring. Exemplarily, the second user equipment intercepts a channel between at least one fourth user equipment within a communication range with the second user equipment. That is, the second channel interception result is an interception result of the second user equipment on a channel between at least one fourth user equipment within the communication range of the second user equipment. Exemplarily, the communication range of the second user equipment may be the same as or different from that of the first user equipment.

After receiving the link establishment request from the first user equipment, the second user equipment authenticates the first user equipment, and sends a link establishment response to the first user equipment. If the authentication passes, service resources are allocated to the first user equipment. Service data transmission can only be performed when the first user equipment has service resources.

The second user equipment determines the first service resource information according to the received first channel detection result and the second channel detection result of the second user equipment itself. The first service resource information is used to indicate the location of the service resource where the first user equipment performs service data transmission.

After determining the first service resource information, the second user equipment sends a link establishment response to the first user equipment. The link establishment response includes the above-mentioned first service resource information.

S503. The first user equipment transmits service data at the service resource location indicated by the first service resource information.

Correspondingly, the second user equipment performs service data transmission with the first user equipment at the service resource location indicated by the first service resource information.

After receiving the first service resource information, the first user equipment may transmit service data with the second user equipment or other user equipment at the service resource location indicated by the first service resource information. Since the first service resource information is determined by the second user equipment according to the first channel detection result and the second channel detection result of the second user equipment itself, service resource conflicts when multiple user equipments access at the same time can be avoided , therefore, the first user equipment can reliably transmit service data.

According to a resource allocation method for D2D communication provided by an embodiment of the present application, the second user equipment receives the first channel detection result of the first user equipment, and according to the first channel detection result and the second user equipment's own second As a result of channel monitoring, the first service resource information is determined, and the first user equipment transmits service data according to the first service resource information, so that the service resource can be accurately determined, so that the first user equipment can reliably realize the transmission of service data, Avoid service resource conflicts when multiple user equipments access at the same time.

As shown in FIG. 6, it is a schematic flowchart of another D2D communication resource allocation method provided by the embodiment of the present application. The method may include the following steps:

S601. The first user equipment detects the channel strength of any subband of the data channel on at least one time-domain resource position, and obtains a first channel detection result.

When the first user equipment needs to join the centered network, it needs to first search for the synchronization signal broadcast by the second user equipment. After the first user equipment searches for the synchronization signal, it becomes a member equipment of the network.

When the first user equipment searches for the synchronization signal broadcast by the second user equipment, it performs channel detection to obtain a first channel detection result. Exemplarily, the first user equipment monitors a channel between at least one third user equipment within its communication range. The first channel interception result is an interception result of the channel between the first user equipment and at least one third user equipment within the communication range of the first user equipment.

Exemplarily, when the first user equipment searches for the synchronization signal broadcast by the second user equipment, it performs channel sensing on at least one time domain resource. The unit of the time-domain resource may be a subframe, a time slot, a mini-slot, and the like. In this embodiment, a unit of time-domain resources is a subframe as an example for description. The first user equipment may perform channel sensing in 0-10239 subframes. The channel sensing result can be represented by a first resource bitmap. For example, the first resource bitmap may include 160 bits. The first resource bitmap is initially all 0, indicating that all subframes are idle.

S602. The first user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to a first threshold, and updates any time domain resource position as channel busy.

The first user equipment maintains the first resource bitmap in real time. When the first user equipment is listening, if it finds a received signal strength indication ( If the received signal strength indication (RSSI) is greater than or equal to the first threshold value, it is considered that the subframe r has been occupied, so the jth bit on the first resource bitmap is set as the first value. where j=n%160. % represents the remainder.

S603. The first user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and updates any time domain resource position as the channel is idle, wherein, The second threshold is smaller than the first threshold.

Further, the first user equipment may also record the time when the jth bit is set to the first value. The first user equipment continues to perform channel sensing, and if the RSSI of all subbands on the subframe corresponding to the jth bit is less than or equal to the second threshold value for p consecutive times, set the jth bit to the second value .

Wherein, the second threshold value is smaller than the first threshold value. The initial values of the first threshold and the second threshold may be pre-configured by the second user equipment and notified to each member equipment. The first threshold value and the second threshold value may also be factory-set.

The above-mentioned first value may be "1", which is used to indicate that the channel on the time domain resource is busy, and the corresponding second value may be "0", which is used to indicate that the channel on the time domain resource is idle. Alternatively, the above-mentioned first value may be "0", which is used to indicate that the channel on the time domain resource is busy, and the corresponding second value may be "1", which is used to indicate that the channel on the time domain resource is idle.

For example, the initial value of the first resource bitmap (in hexadecimal notation): 0x0000000000000000000000000000000000000000.

Assuming that it is detected that the RSSI of the PSSCH channel is greater than or equal to the first threshold value in the 20th subframe, the first resource bitmap is updated to: 0x0000800000000000000000000000000000000000 (that is, the 20th bit is "1").

Assuming that the RSSI of the PSSCH channel is detected to be greater than or equal to the first threshold on the 210# subframe, the first resource bitmap is updated to: 0x0000800000004000000000000000000000000000 (that is, 210%160=50 bits take "1").

Assuming that the RSSIs of the PSSCH channel detected on the 180#, 340#, 500#, 660#, ... 1620# subframes are all less than or equal to the second threshold value, the first resource bitmap is updated to: 0x000000000000400000000000000000000000000 (that is, the 20th Bit takes "0").

S604. The second user equipment detects the channel strength of any subband of the data channel on at least one time-domain resource position, and obtains a second channel detection result.

S605. The second user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to a third threshold, and updates any time domain resource position as channel busy.

S606. The second user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the fourth threshold value for a set number of times, and updates any time domain resource position as the channel is idle, wherein, The fourth threshold is smaller than the third threshold.

The second user equipment may also maintain the second resource bitmap of the second user equipment by referring to the manner in which the first user equipment maintains the first resource bitmap in steps S601-S603 above, to obtain the second channel listening result.

Exemplarily, the second channel sensing result may be the entire second resource bitmap, or may be a bitmap bit value in the second resource bitmap whose value is the second value (that is, the channel is idle).

S607. When the first user equipment accesses the second user equipment, the first user equipment sends a link establishment request message to the second user equipment. The link establishment request message includes the first channel monitoring result of the first user equipment.

For the specific implementation of this step, reference may be made to step S501 in the foregoing embodiment.

Exemplarily. The first channel monitoring result is carried in a media access control-control element (media access control-control element, MAC-CE) of the link establishment request message.

The first channel sensing result can be the entire first resource bitmap; it can also be the first idle time-domain resource information, for example, the bitmap bit value whose value is the second value (that is, the channel is idle) in the first resource bitmap ; It may also be a bitmap bit value whose value is the first value (that is, the channel is busy) in the first resource bitmap.

For example, the first resource bitmap is 0xFFFFFFFFFFFFFFFFFFFF01000800000000000000, that is, the channels on the subframes corresponding to bits 0 to 79, 87 and 100 are busy, and the subframes corresponding to the remaining bits (bits 80 to 86, 88 to 99, and 101 to 159) The channel on is idle. The first user equipment may report either 80-86, 88-99, 101-159, or 0-79 and 87, 100 of the first resource bitmap to the second user equipment.

S608. At least one fifth user equipment sends a third channel sensing result to the second user equipment.

Correspondingly, the second user equipment receives the third channel monitoring result.

The third channel interception result is an interception result of the channel between the at least one fifth user equipment and at least one sixth user equipment within the communication range of the at least one fifth user equipment.

In this embodiment, the second user equipment may also receive a third channel monitoring result of at least one fifth user equipment. The at least one fifth user equipment may be a member equipment that has been connected to the network. Each fifth user equipment may monitor a channel between at least one sixth user equipment within its communication range, and obtain respective channel monitoring results. The at least one fifth user equipment may respectively send the third channel monitoring results to the second user equipment.

Each fifth user equipment may also maintain its own third resource bitmap. The third channel sensing result can be the entire third resource bitmap; it can also be the third idle time-domain resource information, for example, the bitmap bit value whose value is the second value (that is, the channel is idle) in the third resource bitmap ; It may also be a bitmap bit value whose value is the first value (that is, the channel is busy) in the third resource bitmap.

The communication range of each fifth user equipment may be the same or different. The communication ranges of the at least one fifth user equipment and the first user equipment and the second user equipment may also be the same or different.

Assuming that the user equipment 3 and the user equipment 4 have connected to the user equipment 2, the distance between the user equipment 3 and the user equipment 4 is relatively long, and the user equipment 3 and the user equipment 4 cannot detect each other. Both the user equipment 3 and the user equipment 4 send their respective channel detection results to the user equipment 2 . Then the user equipment 2 can obtain the channel detection results of the user equipment 3 and the user equipment 4, which expands the range of channel detection.

S609. The second user equipment sends a link establishment response to the first user equipment.

The link establishment response includes first service resource information.

For the specific implementation of this step, reference may be made to step S502 in the foregoing embodiment. The difference is that the first service resource information is determined according to the first channel sensing result, the second channel sensing result and the third channel sensing result of the second user equipment itself.

Exemplarily, the communication ranges of the first user equipment, the second user equipment and at least one fifth user equipment may be the same or different. Assuming that user equipment 1 and user equipment 3 request access to user equipment 2 at the same time, user equipment 1 and user equipment 3 are far apart, and user equipment 1 and user equipment 3 cannot detect each other. User equipment 2 needs to allocate service resources to user equipment 1 and user equipment 3 . In this embodiment, when user equipment 2 allocates service resources to user equipment 1, it receives the first channel detection result from the first user equipment and the third channel detection result from at least one fifth user equipment, according to the first The first service resource information is determined by the first channel sensing result, the second channel sensing result of the second user equipment itself, and the third channel sensing result, which expands the range of channel sensing. Therefore, the problem of service resource conflict caused by hidden user equipments is solved, resource allocation for D2D communication can be reliably realized, and service resource conflicts when multiple user equipments access at the same time are avoided.

Exemplarily, the second user equipment carries the first service resource information in the MAC CE of the link establishment response. The first service resource information includes at least one of the following information: service resource identifier (RES_IDX), service resource location (RES), service resource period (PERIOD, p), service resource quantity allocated in each period (RES_CNT), The transmission interval (TIME_GAP) between the allocated service resources in each period, and the reserved times of service resources (RESV_CNT). The format of the MAC CE is shown in Table 1 below:

Table 1 Format of MAC CE

信元cell	长度(字节)length (bytes)
RES_IDX RES_IDX	11
RES RES	11
PERIOD PERIOD	11
RES_CNT RES_CNT	11
TIME_GAP TIME_GAP	11
RESV_CNT RESV_CNT	11

Wherein, RES_IDX is an identifier of a service resource, for example, it may be an index of a service resource. When the first user equipment receives the link establishment response, it stores the index. When receiving the second service resource information later, it needs to compare the RES_IDX in the second service resource information with the one stored before. If the service resource of the first user equipment is different, it needs to be ignored.

RES is the business resource location. Exemplarily, RES is the allocated initial service resource location.

PERIOD is the period of business resources. Exemplarily, the service resources allocated by the second user equipment to the first user equipment may be periodic.

RES_CNT is the number of service resources allocated in each cycle (including for initial transmission and retransmission).

TIME_GAP is the transmission interval between allocated service resources in each period.

RESV_CNT is the number of reservations of business resources. According to the needs of the service data transmission of the first user equipment, the second user equipment may reserve service resources for the first user equipment in one or more periods. Each cycle corresponds to a reservation of business resources.

As shown in FIG. 7 , which is a schematic diagram of at least one first idle time domain resource indicated by the first idle time domain resource information in the example of the present application, the second user equipment sends a link establishment response in subframe m. The link establishment response includes first service resource information. The first service resource information is used to indicate at least one available/idle service resource location. Wherein, the second user equipment reserves RESV_CNT secondary service resources for the first user equipment. In the first cycle, the location of the service resource includes: the initial service resource location b+RES, and the subsequent RES_CNT service resource locations in this cycle are: b+RES+TIME_GAP, ... b+RES+TIME_GAP*RES_CNT, The interval between each service resource location is TIME_GAP; in the first RESV_CNT cycle, the location of the service resource includes: the initial service resource location b+RES+p*RESV_CNT, and the subsequent RES_CNT service resource locations in this cycle are: b +RES+TIME_GAP+p*RESV_CNT, ... b+RES+TIME_GAP*RES_CNT+p*RESV_CNT, the interval between each service resource location is TIME_GAP.

The first service resource information is described below through two examples:

In an example, assume that the resource bitmap of the current interception result of the second user equipment is: 0xFFFFFFFFFFFFFFFFFFFF00000000000000000000, and assume that the first channel interception result and the third channel interception result are the same as the resource bitmap, that is, the same as the second user equipment The current channel listening results for no conflicts. According to the resource bitmap, it can be known that the channels on the time domain resources corresponding to bits 0 to 79 are occupied. The cycle of service resources allocated by the second user equipment to the first user equipment is 160ms, and the second user equipment randomly selects a resource within the range of 80-159, assuming that it is 83.

Assuming that the current subframe is 200, the second user equipment sends a link establishment response at 200#, and the TIME_GAP of the allocated service resource is 0, RES_CNT is 1, and RESV_CNT is 5, then the service resource position can be obtained as: 243=200/160* 160+83, 403, 563, 723, 883.

In another example, assume that the current interception result resource bitmap of the second user equipment is: 0xE0000100000000000000000001000000000000000, and assume that the first channel interception result and the third channel interception result are the same as the resource bitmap, that is, the same as the second user equipment The device's current channel listening results are not conflicting. Assuming that the service data transmission of the first user equipment is frequent, the service resource cycle allocated by the second user equipment to the first user equipment is 20 ms, and the above resource bitmap is equally divided into 160/20=8 parts, and the OR operation is performed to obtain Resource bitmap of size 20: 0xF0000. Randomly select a resource within the range of 4 to 19, assuming it is 5.

Assuming that the current subframe is 300, the second user equipment sends a link establishment response at 300#, and the TIME_GAP of the allocated service resource is 2, RES_CNT is 3, and RESV_CNT is 4, then the location of the service resource can be obtained as:

When RESV_CNT=1, that is, in the first cycle, the service resource position is: 305=300/20*20+5, 307=305+2, 309=307+2;

When RESV_CNT=2, that is, in the second period, the service resource locations are: 325,327,329;

When RESV_CNT=3, that is, in the third cycle, the service resource locations are: 345,347,349;

When RESV_CNT=4, that is, in the fourth period, the service resource locations are: 365,367,369.

S610. The first user equipment transmits service data at the service resource location indicated by the first service resource information.

For the specific implementation of this step, reference may be made to step S503 in the foregoing embodiment.

After receiving the first service resource information, the first user equipment parses the available service resource locations according to the above description. When t%PERIOD==RES+i*TIME_GAP and t<m/PERIOD*PERIOD+PERIOD*RESV_CNT+TIME_GAP*RES_CNT, service data can be sent at the current location. Among them, t is the current frame number*10+subframe number, i is any value from 0 to RES_CNT, and m is the frame number*10+subframe number when MSG4 is received.

S611. The second user equipment sends second service resource information when detecting that the number of service data transmissions performed by the first user equipment using the service resources reaches the number of service resource reservations.

Correspondingly, the first user equipment receives the second service resource information.

In the above service resource allocation process, in order to improve the utilization rate of service resources, the second user equipment reserves service resources for a certain number of times (specifically indicated by RESV_CNT). The second user equipment monitors the number of times the first user equipment uses service resources to transmit service data, or the first user equipment reports the number of times it uses service resources to transmit service data, and the second user equipment detects that the first user equipment When the number of business data transmissions using business resources reaches the reserved number of business resources, the business resources are allocated again. Exemplarily, the second user equipment may determine the second service resource information according to the updated first channel sensing result, the updated second channel sensing result and the updated third channel sensing result of the second user equipment itself, specifically For the determination process, reference may be made to the above description. Then, the second user equipment sends the second service resource information to the first user equipment.

The second service resource information includes at least one of the following information: service resource identification, service resource location, service resource cycle, number of service resources allocated in each cycle, transmission interval between service resources allocated in each cycle, The number of reservations for business resources.

The second service resource information may be completely the same, or partly the same, or completely different from the above-mentioned first service resource information.

According to a resource allocation method for D2D communication provided by an embodiment of the present application, the second user equipment receives the first channel detection result of the first user equipment and the third channel detection result of at least one fifth user equipment, according to the first A channel detection result, the second channel detection result of the second user equipment itself, and the third channel detection result determine the first service resource information, and the first user equipment transmits service data according to the first service resource information, thereby Service resources can be accurately determined, so that the first user equipment can reliably transmit service data, and avoid service resource conflicts when multiple user equipments access at the same time;

The communication ranges of the first user equipment, the second user equipment, and the at least one fifth user equipment are the same or different, so that the situation of not being able to detect the channel with the hidden user equipment can be avoided, resulting in a conflict of allocated service resources;

The second user equipment can update the second channel sensing result in real time according to the current channel sensing result, so as to accurately allocate service resources;

When it is detected that the number of service data transmissions performed by the first user equipment using service resources reaches the reserved number of service resources, the second user equipment allocates service resources to the first user equipment again, and the second service resource information may be related to the first service resource The information is the same or different.

Exemplarily, in the embodiment of the present application, the first user equipment or the second user equipment includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide the method according to the embodiment of the present application. For example, the execution body of the method provided by the embodiment of the present application may be a terminal, or a functional module in the first user equipment or the second user equipment that can call a program and execute the program.

In other words, the relevant functions of the first user equipment or the second user equipment in the embodiments of the present application may be realized by one device, or jointly realized by multiple devices, or may be realized by one or more functional modules in one device , which is not specifically limited in this embodiment of the present application. It can be understood that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) virtualization capabilities.

It can be understood that, in order to implement the functions in the foregoing embodiments, the first user equipment or the second user equipment includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.

FIG. 8 and FIG. 9 are schematic structural diagrams of a possible resource allocation device for D2D communication provided by an embodiment of the present application. The resource allocation device for D2D communication may also be a communication device. These resource allocation devices for D2D communication can be used to realize the functions of the first user equipment or the second user equipment in the above method embodiments, and thus can also realize the beneficial effects of the above method embodiments. In the embodiment of the present application, the resource allocation device for D2D communication may be the first user equipment or the second user equipment, or may be a module (such as a chip) applied to the first user equipment or the second user equipment.

As shown in FIG. 8 , a resource allocation device 800 for D2D communication includes a processing unit 810 and a transceiver unit 820 . The resource allocation apparatus 800 for D2D communication is configured to realize the functions of the first user equipment or the second user equipment in the method embodiments shown in FIG. 5 and FIG. 6 above.

When the resource allocation apparatus 800 for D2D communication is used to realize the function of the first user equipment in the method embodiment shown in FIG. 5 or FIG. 6: the transceiving unit 820 is used to access the apparatus when the first user equipment , receiving a link establishment request message from the first user equipment, the link establishment request message including the first channel monitoring result of the first user equipment; the transceiver unit 820 is further configured to send the first The user equipment sends a link establishment response, where the link establishment response includes first service resource information, and the first service resource information is determined according to the first channel detection result and the second channel detection result of the device itself and the transceiving unit 820 is further configured to transmit service data with the first user equipment at the service resource location indicated by the first service resource information.

Optionally, the transceiving unit 820 is further configured to receive a third channel sensing result from at least one fifth user equipment, where the third channel sensing result is a pair between the at least one fifth user equipment and the An interception result of a channel between at least one sixth user equipment within the communication range of at least one fifth user equipment; wherein, the first service resource information is based on the second channel interception result, the first determined by the channel sensing result and the third channel sensing result.

Optionally, the processing unit 810 is configured to detect the channel strength of any subband of the data channel on at least one time-domain resource position, and obtain the second channel detection result; the processing unit 810, It is also used to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel is busy; and the processing unit 810, It is also used to continuously detect that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and update the any time domain resource position as the channel is idle, wherein , the second threshold is smaller than the first threshold.

Optionally, the processing unit 810 is further configured to detect that the signal strength of any subband of the data channel at any time domain resource position n is greater than or equal to the first threshold value, and set the first resource bitmap The jth bit in is set to the first value, where j=n%p, wherein the resource bitmap includes p bits, and % represents a remainder operation.

Optionally, the processing unit 810 is further configured to continuously detect that the signal strength of any subband of the data channel at the m time-domain resource positions corresponding to the j-th bit for the set number of times is less than or equal to The second threshold value is to set the jth bit in the second resource bitmap as a second value.

Optionally, the transceiving unit 820 is further configured to send second service resource information when detecting that the number of service data transmissions performed by the device using service resources reaches the number of service resource reservations.

When the resource allocation apparatus 800 for D2D communication is used to realize the function of the second user equipment in the method embodiment shown in FIG. 5 or FIG. 6: the transceiving unit 820 is used to access the second user equipment when the apparatus , sending a link establishment request message to the second user equipment, where the link establishment request message includes the first channel monitoring result of the apparatus; the transceiver unit 820 is further configured to receive a link establishment request message from the second user equipment A link establishment response, the link establishment response including first service resource information, the first service resource information is determined according to the first channel detection result and the second channel detection result of the second user equipment itself and the transceiving unit 820 is further configured to transmit service data at the service resource location indicated by the first service resource information.

Optionally, the processing unit 810 is configured to detect the channel strength of any subband of the data channel on at least one time-domain resource position, and obtain the first channel detection result; the processing unit 810, It is also used to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel is busy; and the processing unit 810, It is also used to continuously detect that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and update the any time domain resource position as the channel is idle, wherein , the second threshold is smaller than the first threshold.

Optionally, the processing unit 810 is further configured to detect that the signal strength of any subband of the data channel on any time-domain resource position r is greater than or equal to the first threshold value, and set the second resource bitmap The i-th bit in is set to the first value, where i=r%q, wherein the second resource bitmap includes q bits, and % represents a remainder operation.

Optionally, the processing unit 810 is further configured to continuously detect that the signal strength of any subband of the data channel at the s time-domain resource positions corresponding to the i-th bit for the set number of times is less than or equal to The second threshold value is to set the ith bit in the second resource bitmap as a second value.

Optionally, the transceiving unit 820 is further configured to receive second service resource information from the second user equipment when the number of service data transmissions using service resources reaches the number of service resource reservations.

More detailed descriptions about the processing unit 810 and the transceiver unit 820 can be directly obtained by referring to the relevant descriptions in the method embodiments shown in FIG. 5 and FIG. 6 , and will not be repeated here.

As shown in FIG. 9 , a resource allocation device 900 for D2D communication includes a processor 910 and an interface circuit 920 . The processor 910 and the interface circuit 920 are coupled to each other. It can be understood that the interface circuit 920 may be a transceiver or an input-output interface. Exemplarily, the resource allocation apparatus 900 for D2D communication may further include a memory 930 for storing instructions executed by the processor 910 or storing input data required by the processor 910 to execute the instructions or storing data generated after the processor 910 executes the instructions.

When the resource allocation device 900 for D2D communication is used to implement the methods shown in FIG. 5 and FIG. 6 , the processor 910 is used to implement the functions of the processing unit 810 , and the interface circuit 920 is used to implement the functions of the transceiver unit 820 .

When the resource allocation device for D2D communication is a chip applied to the first user equipment/second user equipment, the chip implements the functions of the first user equipment/second user equipment in the above method embodiments. The chip receives information from other modules (such as radio frequency modules or antennas) in the first user equipment/second user equipment, and the information is sent to the first user equipment/second user equipment by other user equipment; or, the chip Sending information to other modules (such as radio frequency modules or antennas) in the first user equipment/second user equipment, the information is sent by the first user equipment/second user equipment to other user equipment.

It can be understood that the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor can be a microprocessor, or any conventional processor.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, compact disc read-only memory (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be a component of the processor. The processor and storage medium can be located in the ASIC. In addition, the ASIC can be located in the base station or the terminal. Certainly, the processor and the storage medium may also exist in the base station or the terminal as discrete components.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a base station, user equipment or other programmable devices. The computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; or it may be a semiconductor medium, such as a solid state disk.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the contextual objects are an "or" relationship.

It can be understood that the various numbers involved in the embodiments of the present application are only for convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic. It should also be understood that the ordinal numerals such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance etc.

Claims

A resource allocation method for D2D communication, characterized in that the method includes:

When the first user equipment accesses the second user equipment, the second user equipment receives a link establishment request message from the first user equipment, and the link establishment request message includes the first channel of the first user equipment listening results;

The second user equipment sends a link establishment response to the first user equipment, where the link establishment response includes first service resource information, and the first service resource information is based on the first channel listening result and the determined by the second channel sensing result of the second user equipment itself;

The second user equipment performs service data transmission with the first user equipment at the service resource location indicated by the first service resource information.
The method according to claim 1, wherein the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource cycle, service resource quantity allocated in each cycle, The transmission interval between business resources allocated in each cycle, and the number of reservations of business resources.
The method according to claim 1 or 2, wherein the first channel sensing result is a communication between the first user equipment and at least one third user equipment within the communication range with the first user equipment. Interception results of the channel between;

The second channel interception result is an interception result of the second user equipment on a channel between at least one fourth user equipment within a communication range of the second user equipment.
The method according to any one of claims 1-3, further comprising:

The second user equipment receives a third channel sensing result from at least one fifth user equipment, where the third channel sensing result is a pair of the at least one fifth user equipment and the at least one fifth user equipment Interception results of channels between at least one sixth user equipment within the communication range;

Wherein, the first service resource information is determined according to the second channel detection result, the first channel detection result and the third channel detection result.
The method according to any one of claims 1-4, wherein the method further comprises:

The second user equipment detects the channel strength of any subband of the data channel on at least one time domain resource position, and obtains the second channel detection result;

The second user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to the first threshold value, and updates the any time domain resource position as the channel is busy;

The second user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to a second threshold value for a set number of times, and updates the any time domain resource position as the channel idle, wherein the second threshold is smaller than the first threshold.
The method according to claim 5, wherein the second user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to the first threshold value, and updates the The channel being busy at any time domain resource position includes: the second user equipment detects that the signal strength of any subband of the data channel at any time domain resource position r is greater than or equal to the first threshold value, and sets the second The i-th bit in the two resource bitmaps is set as the first value, where i=r%q, wherein the second resource bitmap includes q bits, and % represents a remainder operation.
The method according to any one of claims 2-6, wherein the method further comprises:

The second user equipment sends second service resource information when detecting that the number of service data transmissions performed by the first user equipment using service resources reaches the number of service resource reservations.
A resource allocation method for D2D communication, characterized in that the method includes:

When the first user equipment accesses the second user equipment, the first user equipment sends a link establishment request message to the second user equipment, and the link establishment request message includes the first channel detection of the first user equipment Listen to the result;

The first user equipment receives a link establishment response from the second user equipment, where the link establishment response includes first service resource information, and the first service resource information is based on the first channel listening result and the determined by the second channel sensing result of the second user equipment itself;

The first user equipment transmits service data at the service resource location indicated by the first service resource information.
The method according to claim 8, wherein the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource period, service resource quantity allocated in each period, The transmission interval between business resources allocated in each cycle, and the number of reservations of business resources.
The method according to claim 8 or 9, wherein the first channel sensing result is a communication between the first user equipment and at least one third user equipment within the communication range with the first user equipment. Interception results of the channel between;

The second channel interception result is an interception result of the second user equipment on a channel between at least one fourth user equipment within a communication range of the second user equipment.
The method according to any one of claims 8-10, further comprising:

The first user equipment detects the channel strength of any subband of the data channel on at least one time domain resource position, and obtains the first channel detection result;

The first user equipment detects that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to a first threshold value, and updates the any time domain resource position as channel busy;

The first user equipment continuously detects that the signal strength of any subband of the data channel at any time domain resource position is less than or equal to the second threshold value for a set number of times, and updates the any time domain resource position as the channel idle, wherein the second threshold is smaller than the first threshold.
The method according to claim 11, wherein the first user equipment senses that the signal strength of any subband of the data channel at any time domain resource position is greater than or equal to a first threshold value, and updates the The channel being busy at any time domain resource position includes: the first user equipment detects that the signal strength of any subband of the data channel at any time domain resource position n is greater than or equal to the first threshold value, and the second The jth bit in a resource bitmap is set as the first value, where j=n%p, wherein the resource bitmap includes p bits, and % represents a remainder operation.
The method according to any one of claims 9-12, wherein the method further comprises:

The first user equipment receives second service resource information from the second user equipment when the number of service data transmissions using service resources reaches the number of service resource reservations.
A resource allocation device for D2D communication, characterized in that the device includes: a transceiver unit; wherein:

The transceiver unit is configured to receive a link establishment request message from the first user equipment when the first user equipment accesses the apparatus, the link establishment request message including the first channel of the first user equipment listening results;

The transceiver unit is further configured to send a link establishment response to the first user equipment, where the link establishment response includes first service resource information, and the first service resource information is based on the first channel sensing result and Determined by the second channel monitoring result of the device itself;

The transceiving unit is further configured to perform service data transmission with the first user equipment at the service resource location indicated by the first service resource information.
The device according to claim 14, wherein the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource period, service resource quantity allocated in each period, The transmission interval between business resources allocated in each cycle, and the number of reservations of business resources.
The apparatus according to claim 14 or 15, wherein the first channel sensing result is a relationship between the first user equipment and at least one third user equipment within the communication range with the first user equipment. Interception results of the channel between;

The second channel listening result is a result of the apparatus listening to a channel with at least one fourth user equipment within a communication range of the apparatus.
The apparatus according to any one of claims 14-16, wherein the transceiver unit is further configured to receive a third channel monitoring result from at least one fifth user equipment, the third channel monitoring The result is an intercept result of the channel between the at least one fifth user equipment and at least one sixth user equipment within the communication range of the at least one fifth user equipment;

Wherein, the first service resource information is determined according to the second channel detection result, the first channel detection result and the third channel detection result.
The device according to any one of claims 14-17, wherein the device further comprises: a processing unit; wherein:

The processing unit is configured to detect the channel strength of any subband of the data channel on at least one time domain resource position, and obtain the second channel detection result;

The processing unit is further configured to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel is busy;

The processing unit is further configured to continuously detect that the signal strength of any subband of the data channel at any time-domain resource position is less than or equal to a second threshold value for a set number of times, and update the any time-domain resource position The channel is idle, wherein the second threshold is smaller than the first threshold.
The device according to claim 18, wherein the processing unit is further configured to detect that the signal strength of any subband of the data channel at any time domain resource position r is greater than or equal to the first threshold value, setting the i-th bit in the second resource bitmap as the first value, where i=r%q, wherein the second resource bitmap includes q bits, and % represents a remainder operation.
The device according to any one of claims 15-19, wherein the transceiver unit is further configured to monitor that the number of times the device uses service resources for service data transmission reaches the reserved number of service resources , send the second service resource information.
A resource allocation device for D2D communication, characterized in that the device includes: a transceiver unit; wherein:

The transceiver unit is configured to send a link establishment request message to the second user equipment when the apparatus accesses the second user equipment, the link establishment request message including the first channel monitoring result of the apparatus;

The transceiver unit is further configured to receive a link establishment response from the second user equipment, where the link establishment response includes first service resource information, and the first service resource information is based on the first channel listening result determined from the second channel sensing result of the second user equipment itself;

The transceiving unit is further configured to transmit service data at the service resource location indicated by the first service resource information.
The device according to claim 21, wherein the first service resource information includes at least one of the following information: service resource identification, service resource location, service resource period, service resource quantity allocated in each period, The transmission interval between business resources allocated in each cycle, and the number of reservations of business resources.
The apparatus according to claim 21 or 22, wherein the first channel interception result is an interception by the apparatus of a channel between at least one third user equipment within the communication range of the apparatus result;

The second channel interception result is an interception result of the second user equipment on a channel between at least one fourth user equipment within a communication range of the second user equipment.
The device according to any one of claims 21-23, wherein the device further comprises: a processing unit; wherein:

The processing unit is configured to detect the channel strength of any subband of the data channel on at least one time-domain resource position, and obtain the first channel detection result;

The processing unit is further configured to detect that the signal strength of any subband of the data channel on any time domain resource position is greater than or equal to the first threshold value, and update the any time domain resource position as the channel is busy;

The processing unit is further configured to continuously detect that the signal strength of any subband of the data channel at any time-domain resource position is less than or equal to a second threshold value for a set number of times, and update the any time-domain resource position The channel is idle, wherein the second threshold is smaller than the first threshold.
The device according to claim 24, wherein the processing unit is further configured to detect that the signal strength of any subband of the data channel at any time domain resource position n is greater than or equal to the first threshold value, setting the jth bit in the first resource bitmap as the first value, where j=n%p, wherein the resource bitmap includes p bits, and % represents a remainder operation.
The device according to any one of claims 22-25, wherein the transceiver unit is further configured to receive a message from the The second service resource information of the second user equipment is described.
A resource allocation system for D2D communication, characterized by comprising the device according to any one of claims 14-20 and the device according to any one of claims 21-26.
A resource allocation device for D2D communication, characterized in that it includes a processor, the processor is coupled to a memory, and the processor is used to read instructions in the memory, so as to implement any one of claims 1-7. The method described in the item, or, realize the method as described in any one in the claim 8-13.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the method according to any one of claims 1-7 is realized, or, the method according to claim 8- The method described in any one of 13.
A computer program product for, when executed on a computing device, performing the method of any one of claims 1-7, or performing the method of any one of claims 8-13.
A chip, characterized in that the chip is used to execute the method according to any one of claims 1-7, or used to execute the method according to any one of claims 8-13.
A chip module, characterized in that it includes a transceiver component and a chip, the chip is used to perform the method according to any one of claims 1-7, or to perform any method according to any one of claims 8-13 one of the methods described.