WO2020030172A1

WO2020030172A1 - D2d communication method, communication apparatus, and communication system

Info

Publication number: WO2020030172A1
Application number: PCT/CN2019/100171
Authority: WO
Inventors: 王亚飞; 马小骏; 张长; 张弛
Original assignee: 华为技术有限公司
Priority date: 2018-08-10
Filing date: 2019-08-12
Publication date: 2020-02-13
Also published as: CN110830965B; CN110830965A

Abstract

Embodiments of the present application provide a D2D communication method, a communication apparatus, and a communication system. In the D2D communication method, a terminal can receive time-domain resource configuration information, and the time-domain resource configuration information can indicate that symbols comprised in an SA target time-slot and a DATA target time-slot are an uplink symbol, a downlink symbol, and a flexible symbol; after the SA target time-slot and the DATA target time-slot are determined, the terminal can determine an available symbol of the SA target time-slot and an available symbol of the DATA target time-slot according to the time-domain resource configuration information; and then SA is sent on the available symbol of the SA target time-slot, and DATA is sent on the available symbol of the DATA target time-slot, thereby achieving D2D communication by using a time domain resource of NR.

Description

D2D communication method, communication device and communication system

This application claims the priority of a Chinese patent application filed on August 10, 2018 with the State Intellectual Property Office of China, application number 201810913356.2, and application name "A Method, Communication Device, and Communication System for D2D Communication". Incorporated by reference in this application.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a D2D communication method, a communication device, and a communication system.

Background technique

The introduction of vehicle to outside information exchange (V2X) in NR is a key technology for future intelligent transportation systems. V2X applications can include vehicles and vehicles (V2V), vehicles and roadside infrastructure (V2I), vehicles and pedestrians (V2P), and vehicles and application servers (vehicles totonetwork, V2N). The application of V2X can improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and on-board entertainment information. V2X technology can be understood as a type of device-to-device (D2D) technology.

In D2D applications, when the terminal communicates with the terminal, the sending terminal sends a scheduling instruction (SA) on the physical side link control channel (PSCCH) to the data transmission The time domain resource instructs the receiving terminal to obtain the transmitted DATA on the time domain resource indicated by the SA.

In the NR system, how to use time domain resources for D2D communication is an urgent problem.

Summary of the invention

The embodiments of the present application provide a D2D communication method, a communication device, and a communication system. In the NR system, D2D communication can be performed by using time domain resources.

In a first aspect, an embodiment of the present application provides a D2D communication method. The D2D communication method can be applied to a D2D terminal or a chip in a D2D terminal.

The method includes: receiving first time domain resource configuration information from an access network device, where the first time domain resource configuration information is used to indicate that a symbol included in the first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, and the first The time domain resource includes at least one flexible symbol. The first time domain resource includes a scheduling indication SA target slot. The second time domain resource configuration information is received from the access network device, and the second time domain resource configuration information is used to indicate The symbols included in the second time domain resource are an uplink symbol, a downlink symbol, or a flexible symbol. The second time domain resource includes at least one flexible symbol. The second time domain resource includes a data DATA target time slot. The SA target time slot and the DATA target time slot; determining available symbols of the SA target time slot; determining available symbols of the DATA target time slot; sending an SA to the second terminal on the available symbols of the SA target time slot, the SA carrying the DATA target time slot Indication information, the DATA target time slot indication information is used to indicate the DATA target time slot; and DATA is sent to the second terminal on the available symbol of the DATA target time slot.

This method determines the available symbols of the SA target time slot and the available symbols of the DATA target time slot, sends SA on the available symbols of the SA target time slot, and sends DATA on the available symbols of the DATA target time slot. The time domain resource performs D2D communication.

Optionally, in the method, the first time domain resource configuration information is first cell-level semi-static configuration information; the first cell-level semi-static configuration information is received through a system message.

Optionally, in the method, determining the available symbol of the SA target slot includes determining the available symbol of the SA target slot according to the first cell-level semi-static configuration information.

Optionally, the method further includes: receiving first user-level configuration information; the first cell-level semi-static configuration information is further used to indicate that at least one symbol of the SA target slot is a flexible symbol; the first user-level configuration information The at least one flexible symbol used to indicate the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, in the method, determining the available symbol of the SA target slot includes determining the available symbol of the SA target slot according to the first user-level configuration information.

Optionally, in the method, determining the available symbols of the SA target slot includes determining the available symbols of the SA target slot according to the first cell-level semi-static configuration information and the first user-level configuration information.

Optionally, in the method, the first user-level configuration information includes first user-level semi-static configuration information; the first user-level semi-static configuration information is used to indicate the first cell-level semi-static configuration information indicating the The at least one flexible symbol of the SA target slot is an uplink symbol or a downlink symbol; the first user-level semi-static configuration information is carried in an RRC message.

Optionally, in the method, the first user-level configuration information further includes first user-level dynamic configuration information; the first user-level semi-static configuration information is also used to indicate the information indicated by the first cell-level semi-static configuration information. At least one flexible symbol of the SA target slot is a flexible symbol; the first user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first user-level semi-static configuration information is an uplink symbol Or a downlink symbol; the first user-level dynamic configuration information is received on a group common physical downlink control channel GC PDCCH.

Optionally, in the method, the first user-level configuration information includes first user-level dynamic configuration information; the first user-level dynamic configuration information is used to indicate the SA target indicated by the first cell-level semi-static configuration information The at least one flexible symbol of the time slot is an uplink symbol or a downlink symbol; the first user-level dynamic configuration information is received on the GC PDCCH.

Optionally, in the method, the first time-domain resource configuration information is first user-level dynamic configuration information; the first user-level dynamic configuration information is received from the access network device on a GC PDCCH.

Optionally, in the method, determining the available symbol of the SA target slot includes determining the available symbol of the SA target slot according to the first user-level dynamic configuration information.

Optionally, in the method, the second time domain resource configuration information is second cell-level semi-static configuration information;

The second cell-level semi-static configuration information is received through a system message.

Optionally, in the method, the available symbols for determining the DATA target slot include:

The available symbols of the DATA target time slot are determined according to the second cell-level semi-static configuration information.

Optionally, the method further includes: receiving second user-level configuration information; the second cell-level semi-static configuration information is further used to indicate that at least one symbol of the DATA target slot is a flexible symbol; the second user-level configuration information The at least one flexible symbol used to indicate the DATA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, in the method, determining the available symbol of the DATA target slot includes determining the available symbol of the DATA target slot according to the second user-level configuration information.

Optionally, in the method, determining the available symbols of the DATA target slot includes determining the available symbols of the DATA target slot according to the second cell-level semi-static configuration information and the second user-level configuration information.

Optionally, in the method, the second user-level configuration information includes second user-level semi-static configuration information; the second user-level semi-static configuration information is used to indicate the second cell-level semi-static configuration information indicating the The at least one flexible symbol of the SA target slot is an uplink symbol or a downlink symbol; the second user-level semi-static configuration information is carried in an RRC message.

Optionally, in the method, the second user-level configuration information further includes second user-level dynamic configuration information; the second user-level semi-static configuration information is also used to indicate the information indicated by the second cell-level semi-static configuration information. At least one flexible symbol of the DATA target slot is a flexible symbol; the second user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the second user-level semi-static configuration information is an uplink symbol Or downlink symbols; the second user-level dynamic configuration information is received on the group common physical downlink control channel GC PDCCH.

Optionally, in the method, the second user-level configuration information includes second user-level dynamic configuration information; the second user-level dynamic configuration information is used to indicate the SA target indicated by the second cell-level semi-static configuration information The at least one flexible symbol of the time slot is an uplink symbol or a downlink symbol; the second user-level dynamic configuration information is received on the GC PDCCH.

Optionally, in the method, the second time-domain resource configuration information is second user-level dynamic configuration information; the second user-level dynamic configuration information is received from the access network device on the GC PDCCH.

Optionally, in the method, determining the available symbol of the DATA target time slot includes: determining the available symbol of the DATA target time slot according to the second user-level dynamic configuration information.

Optionally, the method further includes: receiving SA target slot indication information and the DATA target slot indication information from an access network device, the SA target slot indication information is used to indicate the SA target slot, and when the DATA target The slot indication information is used to indicate the DATA target time slot;

The determining the SA target time slot and the DATA target time slot includes: determining the SA target time slot according to the SA target time slot indication information; and determining the DATA target time slot according to the DATA target time slot indication information.

Optionally, the method further includes: receiving SA slot resource pool indication information and DATA slot resource pool indication information from the access network device, where the SA slot resource pool indication information is used to indicate when one or more SAs are reserved Slot, the one or more SA reserved time slots include the SA target time slot, the DATA time slot resource pool indication information is used to indicate one or more DATA reserved time slots, and the one or more DATA reserved time slots Including the DATA target slot;

Determining the SA target time slot and the DATA target time slot include: determining the SA target time slot according to the SA time slot resource pool instruction information; and determining the DATA target time slot according to the DATA time slot resource pool instruction information;

The method further includes: determining the DATA target slot indication information.

Optionally, in the method, the SA also carries available symbol indication information of the DATA target slot, and the available symbol indication information of the DATA target slot is used to indicate the available symbol of the DATA target slot.

In a second aspect, an embodiment of the present application provides a D2D communication method. The D2D communication method may be applied to a D2D terminal or a chip in a D2D terminal.

The method includes receiving third time domain resource configuration information from an access network device, where the third time domain resource configuration information is used to indicate that a symbol included in the third time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. The time domain resource includes at least one flexible symbol. The third time domain resource includes an SA target slot. The fourth time domain resource configuration information is received from the access network device, and the fourth time domain resource configuration information is used to indicate a fourth time. The symbols included in the domain resource are uplink symbols, downlink symbols, or flexible symbols. The fourth time domain resource includes at least one flexible symbol. The fourth time domain resource includes a DATA target slot. When receiving SA slot resource pool indication information, the SA The time slot resource pool indication information is used to indicate one or more SA reserved time slots, the one or more SA reserved time slots include the SA target time slot; determine the available symbols of the SA target time slot; Receive an SA from the first terminal on the available symbol of the time slot, the SA includes DATA target time slot indication information, and the DATA target time slot indication information is used to indicate the DATA target time slot; determining the DATA Available symbols for the target time slot; DATA is received from the first terminal on the available symbols for the DATA target time slot.

The method determines the available symbols of the SA target slot and the available symbols of the DATA target slot, receives SA on the available symbols of the SA target slot, and receives DATA on the available symbols of the DATA target slot. The time domain resource performs D2D communication.

Optionally, the third time domain resource configuration information may be third cell-level semi-static configuration information or third user-level dynamic configuration information. For how to determine the available symbols of the SA target slot, refer to the method of the first aspect, for example, The first in the method of the first aspect may be replaced with the third. The fourth time domain resource configuration information may be fourth cell-level semi-static configuration information or fourth user-level dynamic configuration information. For how to determine the available symbols of the SA target slot, refer to the method of the first aspect. For example, the first The second in the aspect method is replaced with the fourth.

In a third aspect, an embodiment of the present application provides a D2D communication method. The D2D communication method may be applied to a D2D terminal or a chip in a D2D terminal.

The method includes receiving third time domain resource configuration information from an access network device, where the third time domain resource configuration information is used to indicate that a symbol included in the third time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. The time domain resource includes at least one flexible symbol, and the third time domain resource includes an SA target slot. Receives SA slot resource pool indication information, which is used to indicate one or more SA reserved time slots. The one or more SA reserved time slots include an SA target time slot; determining available symbols in the SA target time slot; receiving an SA from the first terminal on the available symbols in the SA target time slot, the SA Including DATA target time slot indication information and DATA target time slot available symbol indication information, the DATA target time slot indication information is used to indicate the DATA target time slot, and the available symbol indication information of the DATA target time slot is used to indicate the DATA target time Available symbols in the slot; determining the available symbols of the DATA target slot according to the DATA target slot indication information and the DATA target slot available symbol indication information; in the DATA target slot DATA is received on this available symbol.

Optionally, the third time domain resource configuration information may be third cell-level semi-static configuration information or third user-level dynamic configuration information. For how to determine the available symbols of the SA target slot, refer to the method of the first aspect, for example, The first in the method of the first aspect may be replaced with the third.

In the method of the first aspect to the method of the third aspect of the embodiments of the present application, the available symbols of the SA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the SA target slot. .

In the method of the first aspect to the method of the third aspect of the embodiments of the present application, the available symbols of the DATA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the DATA target slot. .

In a fourth aspect, an embodiment of the present application provides a D2D time domain resource allocation method, which can be used for an access network device or a chip in an access network device.

The method includes: sending first time domain resource configuration information to a first terminal, where the first time domain resource configuration information is used to indicate that a symbol included in the first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. The domain resource includes at least one flexible symbol. The first time domain resource includes a scheduling indication SA target slot. The second time domain resource configuration information is sent to the first terminal. The second time domain resource configuration information is used to indicate the second time domain. The symbols included in the resource are uplink symbols, downlink symbols, or flexible symbols. The second time domain resource includes at least one flexible symbol. The second time domain resource includes a data DATA target time slot. The third time domain resource configuration is sent to the second terminal. Information, the third time domain resource configuration information is used to indicate that the symbols included in the third time domain resource are uplink symbols, downlink symbols, or flexible symbols, the third time domain resource includes at least one flexible symbol, and the third time domain resource includes Data DATA target time slot; sending fourth time domain resource configuration information to the second terminal, the fourth time domain resource configuration information is used to indicate the fourth time domain The symbols included in the resource are an uplink symbol, a downlink symbol, or a flexible symbol. The fourth time domain resource includes at least one flexible symbol. The fourth time domain resource includes a data DATA target slot. The broadcast SA slot resource pool indication information, the SA The time slot resource pool indication information indicates one or more SA reserved time slots, and the one or more SA reserved time slots include an SA target time slot.

Optionally, the first time domain resource indication information may be first cell-level semi-static configuration information, and the method further includes sending first user-level configuration information to the first terminal, where the first cell-level semi-static configuration information is further used for Indicates that at least one symbol of the SA target slot is a flexible symbol, and the first user-level configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or Downward symbol.

Optionally, the first user-level configuration information includes one or more of the first user-level semi-static configuration information and the first user-level dynamic configuration information. The first user-level semi-static configuration information is sent through an RRC message. The first user-level dynamic configuration information is sent on the GC PDCCH.

Optionally, the first time-domain resource indication information may be first user-level semi-static configuration information or first user-level dynamic configuration information. The first user-level semi-static configuration information is sent through an RRC message, and the first user-level dynamic information. The configuration information is sent on the GC PDCCH.

Optionally, the second time domain resource indication information may be second cell-level semi-static configuration information, and the method further includes sending second user-level configuration information to the first terminal, where the second cell-level semi-static configuration information is further used for Indicates that at least one symbol of the SA target slot is a flexible symbol, and the second user-level configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or Downward symbol.

Optionally, the second user-level configuration information includes one or more of the second user-level semi-static configuration information and the second user-level dynamic configuration information. The second user-level semi-static configuration information is sent through an RRC message. The second user-level dynamic configuration information is sent on the GC PDCCH.

Optionally, the second time domain resource indication information may be second user-level semi-static configuration information or second user-level dynamic configuration information. The second user-level semi-static configuration information is sent through an RRC message, and the second user-level dynamic information. The configuration information is sent on the GC PDCCH.

Optionally, the third time domain resource indication information may be third cell-level semi-static configuration information, and the method further includes sending third user-level configuration information to the first terminal, where the third cell-level semi-static configuration information is further used for Indicates that at least one symbol of the SA target slot is a flexible symbol, and the third user-level configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the third cell-level semi-static configuration information is an uplink symbol or Downward symbol.

Optionally, the third user-level configuration information includes one or more of the third user-level semi-static configuration information and the third user-level dynamic configuration information. The third user-level semi-static configuration information is sent through an RRC message. The third user-level dynamic configuration information is sent on the GC PDCCH.

Optionally, the third time domain resource indication information may be third user-level semi-static configuration information or third user-level dynamic configuration information. The third user-level semi-static configuration information is sent through an RRC message, and the third user-level dynamic information. The configuration information is sent on the GC PDCCH.

Optionally, the fourth time domain resource indication information may be fourth cell-level semi-static configuration information, and the method further includes sending fourth user-level configuration information to the first terminal, where the fourth cell-level semi-static configuration information is further used for Indicates that at least one symbol of the SA target slot is a flexible symbol, and the fourth user-level configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the fourth cell-level semi-static configuration information is an uplink symbol or Downward symbol.

Optionally, the fourth user-level configuration information includes one or more of the fourth user-level semi-static configuration information and the fourth user-level dynamic configuration information. The fourth user-level semi-static configuration information is sent through an RRC message. The fourth user-level dynamic configuration information is sent on the GC PDCCH.

Optionally, the fourth time domain resource indication information may be fourth user-level semi-static configuration information or fourth user-level dynamic configuration information. The fourth user-level semi-static configuration information is sent through an RRC message, and the fourth user-level dynamic information. The configuration information is sent on the GC PDCCH.

Optionally, the method further includes: broadcasting DATA time slot resource pool indication information, where the DATA time slot resource pool indication information may indicate one or more DATA reserved time slots, and the one or more DATA reserved time slots include DATA Target time slot.

Optionally, the method further includes: sending SA target slot indication information and DATA target slot indication information to the first terminal, the SA target slot indication information indicating the SA target slot, and the DATA target slot indication information indicating the DATA Target time slot.

The access network device indicates the SA target time slot or the DATA target time slot to the first terminal and the second terminal in units of time slots, which simplifies the process and can avoid the complexity of indicating to the first terminal and the second terminal in units of symbols. It is convenient for the first terminal and the second terminal to determine the available symbols of the SA target slot and the available symbols of the DATA target slot according to the received time domain resource configuration information, transmit the SA on the available symbols of the SA target slot, and transmit the SA target on the DATA target. DATA is transmitted on the available symbols of the time slot.

In a fifth aspect, an embodiment of the present application provides a communication device. The communication device may be a terminal or a chip in the terminal. The communication device includes a processor. The processor is coupled to a memory. The memory is used to store a computer program or Instructions, the processor is configured to execute a computer program or instructions in the memory, so that the communication device executes the method of the first aspect of the claim, and optionally, the communication device further includes the memory.

According to a sixth aspect, an embodiment of the present application provides a communication device. The communication device may be a terminal or a chip in the terminal. The communication device includes a processor. The processor is coupled to a memory. The memory is used to store a computer program or Instructions, the processor is configured to execute the computer program or instructions in the memory, so that the communication device executes the method of the second aspect or the third aspect of the claim, and optionally, the communication device further includes the memory.

According to a seventh aspect, an embodiment of the present application provides a communication device. The communication device may be an access network device or a chip in an access network device. The communication device includes a processor, the processor is coupled to a memory, and the memory The processor is configured to store a computer program or an instruction, and the processor is configured to execute the computer program or the instruction in the memory, so that the communication device executes the method of the fourth aspect of the claim, and the communication device further includes the memory.

In an eighth aspect, an embodiment of the present application provides a computer storage medium, where the storage medium is used to store a computer program or instructions, and when the program is run in a computer, the computer is caused to execute the first aspect, the second aspect, The third or fourth method.

In a ninth aspect, an embodiment of the present application provides a communication device, where the communication device includes one or more modules, and is configured to implement the method of the first aspect, the second aspect, the third aspect, or the fourth aspect, the one or Multiple modules may correspond to the steps of the method of the first aspect, the second aspect, the third aspect, or the fourth aspect described above.

According to a tenth aspect, an embodiment of the present application provides a computer program product. The program product includes a program, and when the program is executed, the method of the first aspect, the second aspect, the third aspect, or the fourth aspect is executed. .

According to an eleventh aspect, an embodiment of the present application provides a communication system. The communication system includes two or three of the communication device of the fifth aspect, the communication device of the sixth aspect, and the communication device of the seventh aspect. The communication system includes the communication device of the fifth aspect and the communication device of the sixth aspect, or the communication system includes the communication device of the fifth aspect and the communication device of the seventh aspect, or the communication system includes the communication device of the sixth aspect and The communication device of the seventh aspect, or the communication device includes the communication device of the fifth aspect, the communication device of the sixth aspect, and the communication device of the seventh aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the present application more clearly, the accompanying drawings used in the description of the embodiments are briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. In other words, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application; FIG.

2A is a schematic structural diagram of an access network device according to an embodiment of the present application;

2B is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a method for performing D2D communication using time domain resources in an NR system according to an embodiment of the present application; FIG.

FIG. 4A is a schematic diagram of a method for determining an available symbol of an SA target slot by the terminal 12 according to an embodiment of the present application; FIG.

4B is a schematic diagram of another method for determining an available symbol of an SA target slot by the terminal 12 according to an embodiment of the present application;

FIG. 4C is a schematic diagram of another method for the terminal 12 to determine the available symbols of the SA target time slot according to an embodiment of the present application; FIG.

4D is a schematic diagram of another method for determining an available symbol of an SA target slot by the terminal 12 according to an embodiment of the present application;

5A is a schematic diagram of a time domain resource indicated by cell-level semi-static configuration information according to an embodiment of the present application;

5B is a schematic diagram of a time domain resource indicated by first cell-level semi-static configuration information according to an embodiment of the present application;

5C is a schematic diagram of a time domain resource indicated by user-level semi-static configuration information according to an embodiment of the present application;

FIG. 5D is a schematic diagram of time domain resources indicated by the first user-level semi-static configuration information according to an embodiment of the present application.

FIG. 5E is a schematic diagram of a time domain resource indicated by the first user-level dynamic configuration information according to an embodiment of the present application; FIG.

FIG. 6 is a schematic diagram of another method for performing D2D communication by using time domain resources in an NR system according to an embodiment of the present application; FIG.

FIG. 7A is a schematic diagram of a method for determining an available symbol of an SA target slot according to an embodiment of the present application; FIG.

FIG. 7B is a schematic diagram of another method for determining an available symbol of an SA target slot according to an embodiment of the present application; FIG.

FIG. 7C is a schematic diagram of another method for determining an available symbol of an SA target slot according to an embodiment of the present application; FIG.

FIG. 7D is a schematic diagram of another method for determining an available symbol of an SA target slot according to an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of another method for D2D communication using time domain resources in an NR system provided by an embodiment of the present application; FIG.

FIG. 9 is a schematic diagram of another method for performing D2D communication by using time domain resources in an NR system according to an embodiment of the present application; FIG.

FIG. 10 is a schematic diagram of a communication device 1000 according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a communication device 1100 according to an embodiment of the present application.

detailed description

The technical solutions in the present application will be described below with reference to the drawings in the present application.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application. The communication system 10 includes an access network device 11, a terminal 12, and a terminal 13.

The terminal 12 and the terminal 13 can directly communicate, for example, the terminal 12 and the terminal 13 can perform device-to-device (D2D) communication.

D2D communication can be understood as direct communication between terminals, and direct communication between terminals does not need to pass through access network equipment. D2D can be called Proximity Service (ProSe), or Proximity-Based Service (ProSe). D2D also includes vehicle (V2X) information exchange with the outside world. In addition to the technology based on cellular communications, the D2D technology can also use technologies such as wireless (fidelity, WiFi) direct, FlashLinQ, bluetooth, and zigbee.

The link that the terminal 12 and the terminal 13 directly communicate with may be referred to as a D2D link, a sidelink, or other terms. When the terminal 12 and the terminal 13 perform D2D communication, the terminal 12 and the terminal 13 may be referred to as D2D terminals, where a terminal that sends data is referred to as a D2D sender and a terminal that receives data is referred to as a D2D receiver. For example, the terminal 12 sends a message to the terminal. 13 sends data, terminal 12 is a D2D sending end, terminal 13 is a D2D receiving end; or, terminal 13 sends data to terminal 12, terminal 13 is a D2D sending end, and terminal 12 is a D2D receiving end. In the embodiment of the present application, for convenience of description, the terminal 12 is a D2D sending end and the terminal 13 is a D2D receiving end as an example for description.

The terminal 12 or the terminal 13 may perform cellular communication with the access network device 11 or may not perform cellular communication with the access network device 11. When the terminal 12 (or the terminal 13) performs cellular communication with the access network device 11, the terminal 12 (or the terminal 13) can perform D2D communication with the terminal 13 (or the terminal 12), for example, through carrier aggregation (CA) ) Or dual connectivity (DC) and other technologies.

There can be multiple D2D communication modes. In different types of wireless communication access systems, the D2D communication mode can be called differently. In the embodiments of the present application, the D2D communication mode can include D2D communication in various wireless communication access systems. Mode, and D2D communication modes that may appear in the future, such as D2D communication modes that may appear in V2X. For example, D2D communication modes may include Mode 1, Mode 2, Mode 3, and Mode 4, where Mode 1 and Mode 2 may be communication modes in traditional D2D, and Mode 3 and Mode 4 may be in the field of (vehicle) to everything (V2X). Mode 3 is similar to Mode 1 and Mode 4 is similar to Mode 2. In Mode 1 and Mode 3, the access network device 11 can allocate D2D time-frequency resources to D2D terminals; in Mode 2 and Mode 4, D2D terminals can The D2D time-frequency resource is selected independently. Mode 2 and mode 4 may include an out-of-coverage (OOC) mode and an edge-of-coverage (EOC) mode.

When D2D terminals (such as terminal 12 and terminal 13) have D2D communication requirements, according to the D2D terminals (such as terminal 12 and terminal 13) located within the coverage area of the access network device 11, the access network device 11 covers the edge or the access network device Outside the coverage area of 11, the D2D terminal (such as terminal 12 and terminal 13) can use different D2D communication modes for D2D communication. The following uses terminal 12 as an example for illustration:

Example 1: The terminal 12 may be located in the coverage area of the access network device 11 or the edge of the coverage area of the access network device 11. The terminal 12 may be in an RRC connected state with the access network device 11 (RRC connected), and the access network device 11 may decide The terminal 12 adopts the mode 1 for D2D communication, or the access network device 11 can decide that the terminal 13 adopts the mode 2 for D2D communication. For example, the access network device 11 can decide that the terminal 13 adopts the EOC mode for D2D communication.

Example 2: The terminal 12 may be located within the coverage area of the access network device 11 or the edge of the coverage area of the access network device 11, the terminal 12 may be in an RRC IDLE state with the access network device 11, and the terminal 12 may be implemented in mode 2 For D2D communication, for example, the terminal 12 may adopt the EOC mode for D2D communication; or, the terminal 12 may enter the RRC connection state. For details, refer to the related content in Example 1.

Example 3: The terminal 12 can be located outside the coverage area of the access network device 11, for example, the terminal 12 moves from being located within the coverage area of the access network device 11 to the edge of the coverage of the access network device 11 or outside the coverage area of the access network device 11, the terminal 12 D2D communication may be performed in mode 2. For example, terminal 12 may perform D2D communication in OOC mode.

The access network device 11 in FIG. 1 may be an access network side device for supporting a terminal to access a communication system, for example, it may be a base transceiver station (BTS) in a 2G access technology communication system and Base station controller (BSC), Node B and radio network controller (RNC) in 3G access technology communication system, evolved base station in 4G access technology communication system ( evolved nodeB (eNB), next-generation base station (gNB), transmission and reception point (TRP), relay node (relay node), and access point (access point) in a 5G access technology communication system , AP) and so on.

The terminal 12 and the terminal 13 in FIG. 1 may be a device that provides voice or data connectivity to a user. For example, the terminal 12 and the terminal 13 may also be referred to as a user equipment (UE), a mobile station (mobile station), and a subscriber unit (subscriber unit). ), Station, terminal equipment (TE), etc. The terminal can be a cellular phone, a personal digital assistant (PDA), a wireless modem (modem), a handheld device (laptop computer), a cordless phone (cordless phone), wireless Local loop (wireless local loop (WLL) stations, pads, etc.). With the development of wireless communication technology, devices that can access the communication system, can communicate with the network side of the communication system, or communicate with other objects through the communication system can be terminals in the embodiments of this application, such as intelligent transportation Terminals and automobiles, household equipment in smart homes, power meter reading instruments in smart grids, voltage monitoring instruments, environmental monitoring instruments, video monitoring instruments in smart security networks, cash registers, and more. In the embodiment of the present application, the terminal may communicate with an access network device, for example, the access network device 11.

FIG. 2A is a schematic structural diagram of an access network device. For the structure of the access network device 11, reference may be made to the structure shown in FIG. 2A.

The access network device includes at least one processor 1111, at least one memory 1112, at least one transceiver 1113, at least one network interface 1114, and one or more antennas 1115. The processor 1111, the memory 1112, and the transceiver 1113 are connected to the network interface 1114, for example, through a bus. The antenna 1115 is connected to the transceiver 1113. The network interface 1114 is used to enable the access network device to connect with other communication devices through a communication link, for example, the access network device is connected to a core network element through an S1 interface. In the embodiment of the present application, the connection may include various interfaces, transmission lines, or buses, which is not limited in this embodiment.

The processor in the embodiment of the present application, such as the processor 1111, may include at least one of the following types: a general-purpose central processing unit (Central Processing Unit), a digital signal processor (Digital Signal Processor, DSP), a microprocessor, Application-Specific Integrated Circuit (ASIC), Microcontroller Unit (MCU), Field Programmable Gate Array (FPGA), or integrated circuit for implementing logic operations . For example, the processor 1111 may be a single-core processor or a multi-core processor. The at least one processor 1111 may be integrated in one chip or located on multiple different chips.

The memory in the embodiment of the present application, such as the memory 1112, may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, and random access memory (random access memory, RAM) or other types of dynamic storage devices that can store information and instructions, can also be electrically erasable programmable read-only memory (Electrically Programmabler-only memory, EEPROM). In some scenarios, the memory can also be a compact disc (read-only memory, CD-ROM) or other disc storage, disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.) , Magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.

The memory 1112 may exist independently and is connected to the processor 1111. Optionally, the memory 1112 may also be integrated with the processor 1111, for example, integrated into a chip. The memory 1112 can store program code that executes the technical solutions of the embodiments of the present application, and is controlled and executed by the processor 1111. The executed computer program codes can also be regarded as the driver of the processor 1111. For example, the processor 1111 is configured to execute computer program code stored in the memory 1112, so as to implement the technical solution in the embodiment of the present application.

The transceiver 1113 may be used to support reception or transmission of radio frequency signals between the access network device and the terminal, and the transceiver 1113 may be connected to the antenna 1115. The transceiver 1113 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1115 may receive a radio frequency signal, and a receiver Rx of the transceiver 1113 is configured to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and convert the digital The baseband signal or the digital intermediate frequency signal is provided to the processor 1111, so that the processor 1111 performs further processing on the digital baseband signal or the digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1113 is also used to receive the modulated digital baseband signal or digital intermediate frequency signal from the processor 1111, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass a Or multiple antennas 1115 send the radio frequency signal. Specifically, the receiver Rx may selectively perform one or more levels of downmix processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The sequence is adjustable. The transmitter Tx can selectively perform one or more levels of upmixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal. The upmixing processing and digital-to-analog conversion processing The sequence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

As shown in FIG. 2B, it is a schematic structural diagram of a terminal according to an embodiment of the present application. For the structure of the terminal 12 or the terminal 13, reference may be made to the structure shown in FIG. 2B.

The terminal includes at least one processor 1211, at least one transceiver 1212, and at least one memory 1213. The processor 1211, the memory 1213, and the transceiver 1212 are connected. Optionally, the terminal 121 may further include an output device 1214, an input device 1215, and one or more antennas 1216. The antenna 1216 is connected to the transceiver 1212, and the output device 1214 and the input device 1215 are connected to the processor 1211.

For the transceiver 1212, the memory 1213, and the antenna 1216, reference may be made to the related description in FIG. 2A to implement similar functions.

The processor 1211 may be a baseband processor or a CPU. The baseband processor and the CPU may be integrated or separated.

The processor 1211 may be used to implement various functions for the terminal, for example, to process a communication protocol and communication data, or to control the entire terminal device, execute a software program, and process data of the software program; or to assist completion Calculation processing tasks, such as graphics and image processing or audio processing; or the processor 1211 is used to implement one or more of the above functions

The output device 1214 communicates with the processor 1211 and can display information in a variety of ways. For example, the output device 1214 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait. The input device 1215 is in communication with the processor 1211 and can accept user input in a variety of ways. For example, the input device 1215 may be a mouse, a keyboard, a touch screen device, or a sensing device.

When the above-mentioned communication system adopts long term evolution (LTE) wireless access technology, D2D communication can be performed using cellular resources. The cellular resources can include TDD resources and / or FDD resources, which are allocated for D2D communication in units of subframes. Time domain resources, TDD and / or FDD uplink subframes can be used for D2D communication. Under TDD, in a radio frame of 10ms, TDD has 7 types of uplink and downlink subframes, and each type of uplink and downlink subframes has preset uplink subframes, downlink subframes, and special subframes. In other words, after the access network device 11 configures the uplink and downlink subframes for the terminal 12, the position of the uplink subframe is fixed, and the uplink subframe can be used for D2D communication. At this time, all symbols in the uplink subframe Both are used for D2D communication. Under FDD, uplink transmission and downlink transmission are distinguished by the frequency domain. One subframe can be used for both uplink transmission and downlink transmission. This subframe can be used for D2D communication. At this time, all symbols in the subframe are used for D2D communication.

In a new radio (NR) system, D2D communication may be performed using cellular resources. The cellular resources may include TDD resources and / or FDD resources. Time domain resources are allocated using time slots or symbols instead of subframes. According to different subcarrier intervals, 1ms can include different numbers of slots. For example, when the subcarrier interval is 15kHz, 1ms includes 1 slot, which occupies 1ms; when the subcarrier interval is 30kHz , 1ms includes 2 time slots, each time slot occupies 0.5ms. A time slot may include several symbols, for example, 12 or 14, and the several symbols may be all used for uplink transmission; or, the several symbols may be all used for downlink transmission; or some symbols are used for uplink transmission and part The symbol is used for downlink transmission; or, further, a part of the symbol is an unknown symbol. The unknown symbol may also be called a flexible symbol, and the access network device may indicate to the terminal the flexible symbol for upload transmission or downlink transmission.

In the NR system, under TDD, it is not limited to TDD. There are 7 types of uplink and downlink subframes. The system can determine the time slot for uplink transmission and the time slot for downlink transmission according to the scheduling situation. Further, it can be flexible based on the scheduling situation. The time slot is used for uplink transmission or downlink transmission; or, the flexible symbol can be used for uplink transmission or downlink transmission according to scheduling conditions.

The method for allocating D2D communication using time domain resources in LTE is no longer applicable to NR systems. Therefore, in the NR system, how to use time domain resources for D2D communication is an urgent problem to be solved.

An embodiment of the present application proposes a solution for performing D2D communication by using time domain resources in an NR system. In this solution, the access network device 11 instructs the time domain resources of the terminal 12 (or the terminal 13) for D2D communication in time slot units, and the terminal 12 (or the terminal 13) combines the time domain resources of the terminal 12 (or the terminal 13). The configuration information determines the symbols conforming to the D2D time domain resource type, and then transmits SA and DATA on the symbols conforming to the D2D time domain resource type.

Some terms that may appear in the embodiments of the present application are explained below.

The time domain resource may be a continuous or non-continuous time domain resource. The time domain resource may include one or more consecutive or non-consecutive symbols, and some or all of the one or more symbols may belong to 1 or more time slots.

The cell-level semi-static configuration information is used to indicate that the symbols included in a time domain resource are uplink symbols, downlink symbols, or flexible symbols. The cell level can be understood as the configuration information is valid for the terminals in the cell or the configuration information can be sent to the Terminal, semi-static can be understood as the configuration information can be issued through high-level signaling, this high-level signaling can be understood as radio resource control (radio resource control (RRC) layer signaling, for example, the high-level signaling can be a system message The access network device can broadcast a system message, and the system message can carry cell-level semi-static configuration information.

The user-level semi-static configuration information is used to indicate that the symbols included in a time domain resource are uplink symbols, downlink symbols, or flexible symbols. The user level can be understood as the configuration information is valid for a specific terminal or the configuration information can be sent to a specific terminal. Static can be understood as the configuration information can be delivered through high-level signaling. High-level signaling can be understood as radio resource control (RRC) layer signaling. For example, the high-level signaling can be an RRC message and access network equipment. An RRC message may be sent to the terminal, and the RRC message may include terminal-level semi-static configuration information.

User-level dynamic configuration information is used to indicate that the symbols included in a time-domain resource are uplink symbols, downlink symbols, or flexible symbols. User-level configuration information can be understood to be valid for specific terminals or the configuration information can be sent to specific terminals. It is understood that the configuration information can be delivered through physical layer information. For example, the physical layer signaling can be downlink control information (DCI), and the access network device can use the physical downlink control channel (PDCCH). Send the DCI. The DCI may include terminal-level dynamic configuration information. Here, the PDCCH may be a group common (GC) PDCCH.

The foregoing cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information may be collectively referred to as time domain resource configuration information.

For ease of description, in the embodiment of the present application, when a time slot is used for uplink transmission, the time slot may be referred to as an uplink time slot. At this time, all symbols in the time slot are uplink symbols. During downlink transmission, this time slot can be called a downlink time slot. At this time, all symbols in the time slot are downlink symbols. When a symbol is used for uplink transmission, the symbol can be called an uplink symbol. When a symbol is used During downlink transmission, this symbol can be called a downlink symbol.

FIG. 3 is a schematic diagram of a method for performing D2D communication using time domain resources in an NR system, as shown in FIG. 3.

S301: The access network device 11 sends the first time domain resource configuration information to the terminal 12.

For example, the processor 1111 of the access network device 11 may send the first time domain resource configuration information to the terminal 12 through the antenna 1115.

Accordingly, the terminal 12 receives the first time domain resource configuration information. For example, the processor 1211 of the terminal 12 may receive the first time domain resource configuration information from the access network device 11 by using the antenna 1216.

The first time domain resource configuration information is used to indicate that the symbols included in the first time domain resource are uplink symbols, downlink symbols, or flexible symbols.

As a first example, for each symbol in the first time domain resource, the first time domain resource configuration information may indicate that the symbol is an uplink symbol, a downlink symbol, or a flexible symbol.

As a second example, the terminal 12 and the access network device 11 may be negotiated. The first time domain resource configuration information may indicate two types of an uplink symbol, a downlink symbol, and a flexible symbol in the first time domain resource. The symbol not indicated by the domain resource configuration information is another symbol. For example, the terminal 12 and the access network device 11 may negotiate, and the first time domain resource configuration information may indicate an uplink symbol and a downlink symbol in the first time domain resource, and the first time domain resource configuration information is not indicated as an uplink symbol or a downlink The symbol is a flexible symbol.

In the above two examples, the first time domain resource configuration information may indicate, by indicating the position and number of uplink symbols, downlink symbols, or flexible symbols, to indicate whether the symbols included in the first time domain resource are uplink symbols, downlink symbols, or flexible. symbol.

The first time domain resource includes a scheduling instruction SA target time slot, and it can be understood that the first time domain resource includes symbols in the SA target time slot.

The first time domain resource configuration information may indicate that a symbol included in the SA target slot is an uplink symbol, a downlink symbol, or a flexible symbol.

Optionally, the first time domain resource includes at least one flexible symbol. Optionally, the SA target time slot may include at least one flexible symbol, or the first time domain resource other than the SA target time slot includes at least one flexible symbol. Optionally, the at least one flexible symbol may be used for transmitting data.

Optionally, the first time domain resource configuration information may be first cell-level semi-static configuration information, first user-level semi-static configuration information, or first user-level dynamic configuration information.

When the first time domain resource configuration information is the first cell-level semi-static configuration information, the access network device 11 may broadcast a system message, where the system message includes the first cell semi-static configuration information.

When the first time domain resource configuration information is the first user-level semi-static configuration information, the access network device 11 may send an RRC message to the terminal 12, and the RRC message includes the first user-level semi-static configuration information.

When the first time domain resource configuration information is first user-level dynamic configuration information, the access network device 11 may send DCI to the terminal 12 through the PDCCH, where the DCI includes the first user-level dynamic configuration information, and the PDCCH may be a GC PDCCH.

S302: The access network device 11 sends the second time domain resource configuration information to the terminal 12.

For example, the processor 1111 of the access network device 11 may send the second time domain resource configuration information to the terminal 12 through the antenna 1115.

Accordingly, the terminal 12 receives the second time domain resource configuration information. For example, the processor 1211 of the terminal 12 may receive the second time domain resource configuration information from the access network device 11 by using the antenna 1216.

The second time domain resource configuration information is used to indicate that a symbol included in the second time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. The embodiment of the present application does not limit the indication manner of the second time domain resource configuration information, and may Refer to the indication method of the first time domain resource configuration information in S301.

The second time domain resource includes a data DATA target time slot, and it can be understood that the second time domain resource includes symbols in the DATA target time slot.

Optionally, the second time domain resource includes at least one flexible symbol. Optionally, the DATA target time slot may include at least one flexible symbol, or the first time domain resource outside the DATA target time slot includes at least one flexible symbol. Optionally, the at least one flexible symbol may be used for transmitting data.

The second time domain resource configuration information may be second cell-level semi-static configuration information, second user-level semi-static configuration information, or second user-level dynamic configuration information. Reference may be made to related content of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information in S301, and details are not described herein again.

S302 is optional.

Optionally, the first time domain resource configuration information and the second time domain resource configuration information may be the same. At this time, S302 may not exist, and the access network device may only send the first time domain resource configuration information and the first time domain resource configuration. The first time domain resource indicated by the information includes an SA target slot and a DATA target slot. For example, the first time domain resource configuration information is first cell-level semi-static configuration information, the second time domain resource configuration information is second cell-level semi-static configuration information, the first cell-level semi-static configuration information, and the second cell-level semi-static configuration information. The static configuration information is the same, and the access network device 11 may broadcast a system message including the first cell-level semi-static configuration information. The first time-domain resource indicated by the first cell-level semi-static configuration information includes the SA target time slot and DATA. Target time slot. As another example, the first time domain resource configuration information is first user-level semi-static configuration information, the second time domain resource configuration information is second user-level semi-static configuration information, first user-level semi-static configuration information, and second user-level The semi-static configuration information is the same. The access network device 11 may send an RRC message to the terminal 12. The RRC message includes the first user-level semi-static configuration information. The first time-domain resource indicated by the first user-level semi-static configuration information includes the SA target. Time slot and DATA target time slot. As another example, the first time domain resource configuration information is first user-level dynamic configuration information, the second time domain resource configuration information is second user-level dynamic configuration information, first user-level dynamic configuration information, and second user-level dynamic configuration information. Similarly, the access network device 11 may send a DCI to the terminal 12 through a PDCCH channel. The DCI includes first user-level dynamic configuration information, and the first time domain resource indicated by the first user-level dynamic configuration information includes an SA target time slot and a DATA target. Time slot.

Optionally, the first time domain resource configuration information and the second time domain resource configuration information may be different. At this time, S302 may exist. The first time domain resource and the second time domain resource may be different time domain resources. The domain resources include SA target time slots, and the second time domain resources include DATA target time slots. For example, the first time domain resource configuration information is first cell-level semi-static configuration information, the second time domain resource configuration information is second cell-level semi-static configuration information, the first cell-level semi-static configuration information, and the second cell-level semi-static configuration information. The static configuration information is different. The access network device 11 broadcasts two system messages. The first system message includes the first cell-level semi-static configuration information, and the second system message includes the second cell-level semi-static configuration information. As another example, the first time domain resource configuration information is first user-level semi-static configuration information, the second time domain resource configuration information is second user-level semi-static configuration information, first user-level semi-static configuration information, and second user-level The semi-static configuration information is different. The access network device 11 sends two RRC messages to the terminal 12, one RRC message includes the first user-level semi-static configuration information, and the other RRC message includes the second user-level semi-static configuration information. As another example, the first time domain resource configuration information is first user-level dynamic configuration information, the second time domain resource configuration information is second user-level dynamic configuration information, first user-level dynamic configuration information, and second user-level dynamic configuration information. Differently, the access network device 11 sends two DCIs through the PDCCH. One DCI includes first user-level dynamic configuration information, and the other DCI includes second user-level dynamic configuration information. For another example, the first time domain resource configuration information is first cell-level semi-static configuration information, and the second time domain resource configuration information is second user-level semi-static configuration information or second user-level dynamic configuration information; or, the first time The domain resource configuration information is the first user-level semi-static configuration information, and the second time domain resource configuration information is the second cell-level semi-static configuration information or the second user-level dynamic configuration information; or, the first time-domain resource configuration information is the first A user-level dynamic configuration information, and the second time-domain resource configuration information is the second cell-level semi-static configuration information or the second user-level semi-static configuration information, where the access network device 11 delivers the first time-domain resource configuration information For the configuration information of the second time domain resource, refer to related content in S301 and S302, and details are not described herein again.

S303: The access network device 11 sends the third time domain resource configuration information to the terminal 13.

For example, the processor 1111 of the access network device 11 may send the third time domain resource configuration information to the terminal 13 through the antenna 1115.

Accordingly, the terminal 13 receives the third time domain resource configuration information. For example, the processor 1211 of the terminal 13 may receive the third time domain resource configuration information from the access network device 11 by using the antenna 1216.

The third time domain resource configuration information is used to indicate that the symbols included in the third time domain resource are uplink symbols, downlink symbols, or flexible symbols. The embodiment of the present application does not limit the indication manner of the third time domain resource configuration information, and may refer to the indication manner of the first time domain resource configuration information in S301.

The third time domain resource includes a scheduling instruction SA target time slot, and it can be understood that the third time domain resource includes symbols in the SA target time slot.

Optionally, the SA target time slot included in the third time domain resource may be the same as the SA target time slot included in the first time domain resource in S301.

Optionally, the third time domain resource includes at least one flexible symbol. Optionally, the SA target time slot may include at least one flexible symbol, or the third time domain resource other than the SA target time slot includes at least one flexible symbol. Optionally, the at least one flexible symbol may be used for transmitting data.

The third time domain resource configuration information may be third cell-level semi-static configuration information, third user-level semi-static configuration information, or third user-level dynamic configuration information. Reference may be made to related content of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information in S301, and details are not described herein again.

S304: The access network device 11 sends the fourth time domain resource configuration information to the terminal 13.

For example, the processor 1111 of the access network device 11 may send the fourth time domain resource configuration information to the terminal 13 through the antenna 1115.

Accordingly, the terminal 13 receives the fourth time domain resource configuration information. For example, the processor 1211 of the terminal 13 may receive the fourth time domain resource configuration information from the access network device 11 by using the antenna 1216.

The fourth time domain resource configuration information is used to indicate that the symbols included in the fourth time domain resource are uplink symbols, downlink symbols, or flexible symbols. The embodiment of the present application does not limit the indication manner of the fourth time domain resource configuration information, and may refer to the indication manner of the first time domain resource configuration information in S301.

The fourth time domain resource includes a data DATA target time slot, and it can be understood that the fourth time domain resource includes symbols in an SA target time slot.

Optionally, the DATA target time slot included in the fourth time domain resource may be the same as the DATA target time slot included in the second time domain resource in S302.

Optionally, the fourth time domain resource includes at least one flexible symbol. Optionally, the DATA target time slot may include at least one flexible symbol, or a fourth time domain resource other than the DATA target time slot includes at least one flexible symbol. Optionally, the at least one flexible symbol may be used for transmitting data.

The fourth time domain resource configuration information may be fourth cell-level semi-static configuration information, fourth user-level semi-static configuration information, or fourth user-level dynamic configuration information. Reference may be made to related content of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information in S301, and details are not described herein.

S304 is optional.

Optionally, the third time domain resource configuration information and the fourth time domain resource configuration information may be the same or different. For details, refer to related content in which the first time domain resource configuration information and the second time domain resource configuration information may be the same or different. I will not repeat them here.

Optionally, the first time domain resource configuration information and the third time domain resource configuration information may be the same. For example, the first time domain resource configuration information is the first cell-level semi-static configuration information, and the third time domain resource configuration information is the first Three cell-level semi-static configuration information, the first cell-level semi-static configuration information is the same as the third cell-level semi-static configuration information, S301 and S303 can be understood as a step, that is, the access network device 11 can broadcast a system message, and the system message Including the first cell-level semi-static configuration information, both the terminal 12 and the terminal 13 can receive the system message. For another example, the first time domain resource configuration information is first user-level semi-static configuration information, the third time domain resource configuration information is third user-level semi-static configuration information, first user-level semi-static configuration information, and third user-level The semi-static configuration information is the same. The RRC message that the access network device 11 can send to the terminal 12 includes the first user-level semi-static configuration information. The RRC message that the access network device 11 can send to the terminal 13 includes the third user-level semi-static configuration. information. For another example, the first time domain resource configuration information is first user level dynamic configuration information, the third time domain resource configuration information is third user level dynamic configuration information, first user level dynamic configuration information and third user level dynamic configuration information Similarly, the DCI that the access network device 11 can send to the terminal 12 through the PDCCH channel includes the first user-level dynamic configuration information, and the DCI that the access network device 11 can send to the terminal 13 through the PDCCH channel includes the third user-level dynamic configuration information.

Optionally, the first time domain resource configuration information and the third time domain resource configuration information may be different. For example, the first time domain resource configuration information is first cell-level semi-static configuration information, and the third time domain resource configuration information is first. Three cell-level semi-static configuration information. The first cell-level semi-static configuration information is different from the third cell-level semi-static configuration information. The access network device 11 broadcasts two system messages. The first system message includes the first cell-level semi-static configuration information. For the static configuration information, the terminal 12 receives the first system message, the second system message includes the third cell-level semi-static configuration information, and the terminal 13 receives the second system message. For another example, the first time domain resource configuration information is first user-level semi-static configuration information, the third time domain resource configuration information is third user-level semi-static configuration information, first user-level semi-static configuration information, and third user-level The semi-static configuration information is different. The RRC message sent by the access network device 11 to the terminal 12 includes the first user-level semi-static configuration information, and the RRC message sent by the access network device 11 to the terminal 13 includes the third user-level semi-static configuration information. For another example, the first time domain resource configuration information is first user level dynamic configuration information, the third time domain resource configuration information is third user level dynamic configuration information, first user level dynamic configuration information and third user level dynamic configuration information Differently, the DCI sent by the access network device 11 to the terminal 12 through the PDCCH includes the first user-level dynamic configuration information, and the DCI sent by the access network device 11 to the terminal 13 through the PDCCH includes the third user-level dynamic configuration information. For another example, the first time domain resource configuration information is first cell-level semi-static configuration information, and the third time domain resource configuration information is third user-level semi-static configuration information or third user-level dynamic configuration information; or, the first time The domain resource configuration information is the first user-level semi-static configuration information, and the third time domain resource configuration information is the third cell-level semi-static configuration information or the third user-level dynamic configuration information; or, the first time-domain resource configuration information is the first A user-level dynamic configuration information, and the third time-domain resource configuration information is the third cell-level semi-static configuration information or the third user-level semi-static configuration information, where the access network device 11 delivers the first time-domain resource configuration information For the configuration information of the third time domain resource, refer to related content in S301 and S303, and details are not described herein again.

Optionally, the second time domain resource configuration information and the fourth time domain resource configuration information may be the same or different, and reference may be made to related content in which the first time domain resource configuration information and the third time domain resource configuration information are the same or different.

Optionally, the first time domain resource configuration information, the second time domain resource configuration information, the third time domain resource configuration information, and the fourth time domain resource configuration information may be the same. For example, the first time domain resource configuration information is the first Cell-level semi-static configuration information, the second time-domain resource configuration information is the second cell-level semi-static configuration information, the third time-domain resource configuration information is the third cell-level semi-static configuration information, and the fourth time-domain resource configuration information is the first Four cell-level semi-static configuration information, the first cell-level semi-static configuration information, the second cell-level semi-static configuration information, and the third cell-level semi-static configuration information are the same as the fourth cell-level semi-static configuration information. The first time domain resource indicated by the static configuration information includes an SA target slot and a DATA target slot. S301, S302, S303, and S304 can be understood as a step, that is, the access network device 11 broadcasts a system message, the system message includes the first cell semi-static configuration information, and the first cell-level semi-static configuration information includes the SA target time slot and the DATA target Time slot.

Optionally, the first time domain resource configuration information, the second time domain resource configuration information, the third time domain resource configuration information, and the fourth time domain resource configuration information may be different. For example, the first time domain resource configuration information is the first User level dynamic configuration information, second time domain resource configuration information is second user level dynamic configuration information, third time domain resource configuration information is third user level dynamic configuration information, and fourth time domain resource configuration information is fourth user level. The dynamic configuration information, the first user-level dynamic configuration information, the second user-level dynamic configuration information, the third user-level dynamic configuration information, and the fourth user-level dynamic configuration information are all different.

S305: The access network device 11 broadcasts SA slot resource pool indication information.

For example, the processor 1111 of the access network device 11 may broadcast the SA slot resource pool indication information through the antenna 1115.

The SA slot resource pool indication information is used to indicate one or more SA reserved slots, and the one or more SA reserved slots include the SA target slot.

Accordingly, the terminal 12 and the terminal 13 may receive the SA slot resource pool indication information. For example, the processor 1211 of the terminal 12 and the processor 1211 of the terminal 13 may use the antenna 1216 to receive the SA slot resource pool indication information.

S306: The access network device 11 broadcasts DATA time slot resource pool indication information.

The DATA time slot resource pool indication information is used to indicate one or more DATA reserved time slots, where the one or more DATA reserved time slots include the DATA target time slot.

Accordingly, the terminal 12 and the terminal 13 may receive the DATA slot resource pool indication information. For example, the processor 1211 of the terminal 12 and the processor 1211 of the terminal 13 may use the antenna 1216 to receive the DATA time slot resource pool indication information.

S306 is optional.

S307: The access network device 11 sends the SA target slot indication information and the DATA target slot indication information to the terminal 12.

For example, the processor 1111 of the access network device 11 may send the SA target slot indication information and the DATA target slot indication information to the terminal 12 through the antenna 1115.

The SA target slot indication information is used to indicate the SA target slot, and the DATA target slot indication information is used to indicate the DATA target slot.

For example, the access network device 11 may send a DCI5 to the terminal 12, and the DCI5 includes the SA target slot indication information and the DATA target slot indication information.

S307 is optional, and may include the following situations, for example:

(1) S307 exists. When the terminal 12 and the terminal 13 adopt the mode 1 for D2D communication, the access network device 11 can determine the SA target time slot and the DATA target time slot, and then use the SA target time slot indication information and user information to indicate the SA target time slot. The terminal 12 is informed of the DATA target slot indication information indicating the DATA target slot.

(2) S307 does not exist. When the terminal 12 and the terminal 13 use the mode 2 for D2D communication, after the access network device 11 broadcasts the SA slot resource pool instruction information and the DATA slot resource pool instruction information in S305-S306, the terminal 12 can use the SA slot from The SA time slot resource pool indicated by the resource pool instruction information autonomously selects the SA target time slot, and the terminal 12 may autonomously select the DATA target time slot from the DATA time slot resource pool indicated by the DATA time slot resource pool indication information.

Accordingly, the terminal 12 may receive the SA target slot indication information and the DATA target slot indication information from the access network device 11. For example, the processor 1211 of the terminal 12 may use the antenna 1216 to receive the SA target slot indication information and the DATA target slot indication information from the access network device 11.

S308: The terminal 12 determines an SA target time slot and a DATA target time slot.

For example, the processor 1111 of the access network device 11 may determine an SA target time slot and a DATA target time slot.

The terminal 12 determines that the SA target time slot and the DATA target time slot can have the following two examples:

(1) S307 exists. When terminal 12 and terminal 13 use mode 1 for D2D communication, terminal 12 can determine the SA target time slot according to the SA target time slot indication information, and terminal 12 can determine the SA target time slot according to the DATA target time slot. The indication information determines the DATA target time slot.

(2) S307 does not exist. When terminal 12 and terminal 13 use mode 2 for D2D communication, terminal 12 can determine the SA target time slot based on the SA time slot resource pool information, and terminal 12 can determine the DATA target based on the DATA time slot resource pool information. Time slot. For example, the SA time slot resource pool instruction information indicates one or more SA reserved time slots. The terminal 12 may select an SA target time slot from one or more SA reserved time slots. The DATA time slot resource pool instruction information indicates With one or more DATA reserved time slots, the terminal 12 may select a DATA target time slot from one or more DATA reserved time slots.

S309: The terminal 12 determines available symbols of the SA target slot.

For example, the processor 1211 of the terminal 12 may determine the available symbols for the SA target slot.

The available symbols of the SA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the SA target slot. For example, the available symbols of the SA target slot may have the following situations:

(1) The available symbols of the SA target slot include an uplink symbol of the SA target slot.

Optionally, all the symbols of the SA target slot may be uplink symbols, and the available symbols of the SA target slot may include all the symbols of the SA target slot; or, some of the symbols of the SA target slot are uplink symbols The available symbols of the SA target slot may include a part of the symbol of the SA target slot, and the part of the symbol is an uplink symbol.

(2) The available symbols of the SA target time slot include flexible symbols of the SA target time slot.

Optionally, all the symbols of the SA target slot may be flexible symbols, and the available symbols of the SA target slot may include all the symbols of the SA target slot; or, some of the symbols of the SA target slot are flexible symbols The available symbols of the SA target time slot may include a part of the symbols of the SA target time slot, and the part of the symbols are flexible symbols.

(3) The available symbols of the SA target slot include an uplink symbol and a flexible symbol of the SA target slot.

Optionally, the SA target time slot does not include downlink symbols, and the available symbols of the SA target time slot may include all symbols of the SA target time slot; or the SA target time slot includes downlink symbols, and the SA target The available symbols of the time slot may include uplink symbols and flexible symbols of the SA target time slot.

(4) The available symbols of the SA target slot include a downlink symbol of the SA target slot.

Optionally, all the symbols of the SA target time slot may be downlink symbols, and the available symbols of the SA target time slot may include all the symbols of the SA target time slot; or, some of the symbols of the SA target time slot are downlink symbols The available symbols of the SA target slot may include a part of the symbols of the SA target slot, and the part of the symbols are downlink symbols.

(5) The available symbols of the SA target slot include a downlink symbol and a flexible symbol of the SA target slot.

Optionally, the SA target time slot does not include uplink symbols, and the available symbols of the SA target time slot may include all symbols of the SA target time slot; or the SA target time slot includes uplink symbols, and the SA target The available symbols of the time slot may include downlink symbols and flexible symbols of the SA target time slot.

(6) The available symbols of the SA target slot include an uplink symbol, a flexible symbol, and a downlink symbol of the SA target slot.

Optionally, the first time domain resource configuration information indicates that the symbols included in the SA target slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may determine the available symbols of the SA target slot according to the first time domain resource configuration information. Optionally, other configuration information may indicate that the symbols included in the SA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may also determine the available symbols of the SA target time slot according to the other configuration information. This is not described in this embodiment of the present application. limit.

S310: The terminal 12 determines available symbols of the DATA target slot.

The available symbols of the DATA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the DATA target slot.

Optionally, when step S307 does not exist, the method may further include: the terminal 12 determines indication information of available symbols of the DATA target slot, and the available symbol indication information of the DATA target slot is used to indicate the DATA The available symbols of the target time slot.

For example, the available symbols of the DATA target slot may have the following conditions:

(1) The available symbols of the DATA target slot include an uplink symbol of the DATA target slot.

Optionally, all the symbols of the DATA target time slot may be uplink symbols, and the available symbols of the DATA target time slot may include all the symbols of the DATA target time slot; or part of the symbols of the DATA target time slot are uplink symbols The available symbols of the DATA target time slot may include a partial symbol of the DATA target time slot, where the partial symbol is an uplink symbol.

(2) The available symbols of the DATA target slot include flexible symbols of the DATA target slot.

Optionally, all the symbols of the DATA target time slot may be flexible symbols, and the available symbols of the DATA target time slot may include all the symbols of the DATA target time slot; or part of the symbols of the DATA target time slot are flexible symbols The available symbols of the DATA target time slot may include a partial symbol of the DATA target time slot, and the partial symbol is a flexible symbol.

(3) The available symbols of the DATA target slot include an uplink symbol and a flexible symbol of the DATA target slot.

Optionally, the DATA target time slot does not include downlink symbols, and the available symbols of the DATA target time slot may include all symbols of the DATA target time slot; or the DATA target time slot includes downlink symbols, and the DATA target The available symbols of the time slot may include uplink symbols and flexible symbols of the DATA target time slot.

(4) The available symbols of the DATA target slot include a downlink symbol of the DATA target slot.

Optionally, all the symbols of the DATA target time slot may be downlink symbols, and the available symbols of the DATA target time slot may include all the symbols of the DATA target time slot; or some of the symbols of the DATA target time slot are downlink symbols The available symbols of the DATA target time slot may include a partial symbol of the DATA target time slot, where the partial symbol is a downlink symbol.

(5) The available symbols of the DATA target slot include a downlink symbol and a flexible symbol of the DATA target slot.

Optionally, the DATA target time slot does not include uplink symbols, and the available symbols of the DATA target time slot may include all symbols of the DATA target time slot; or the DATA target time slot includes uplink symbols, and the DATA target The available symbols of the time slot may include downlink symbols and flexible symbols of the DATA target time slot.

(6) The available symbols of the DATA target slot include an uplink symbol, a flexible symbol, and a downlink symbol of the DATA target slot.

Optionally, the second time domain resource configuration information indicates that the symbols included in the DATA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may determine the available symbols of the DATA target time slot according to the second time domain resource configuration information. Optionally, other configuration information may indicate that the symbols included in the DATA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may also determine the available symbols of the DATA target time slot according to the other configuration information. This is not described in this embodiment of the present application. limit.

S311: The terminal 13 determines an available symbol of the SA target slot.

For example, the processor 1211 of the terminal 13 may determine the available symbols of the SA target slot.

The available symbols of the SA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the SA target slot.

For the available symbols of the SA target time slot, refer to related content of the available symbols of the SA target time slot in S309.

Optionally, in S305, the terminal 12 may receive SA slot resource pool indication information, where the SA slot resource pool indication information may indicate one or more SA reserved time slots, and the one or more SA reserved The time slot includes the SA target time slot. The terminal 12 may not know which of the one or more SA reserved time slots are the SA target time slots. In S311, the terminal 13 may determine the one. Or available symbols for multiple SA reserved time slots.

Optionally, the third time domain resource configuration information indicates that the symbols included in the SA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may determine the available symbols of the SA target time slot according to the third time domain resource configuration information. Optionally, other configuration information may indicate that the symbols included in the SA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may also determine the available symbols of the SA target time slot according to the other configuration information. This is not described in this embodiment of the present application. limit.

S312: The terminal 12 sends an SA on the available symbols of the SA target slot.

For example, the processor 1211 of the terminal 12 may use the antenna 1216 to transmit the SA on the available symbols of the SA target slot.

Accordingly, the terminal 13 receives the SA on the available symbols of the SA target slot. For example, the processor 1211 of the terminal 13 may use the antenna 1216 to receive the SA on the available symbol of the SA target slot.

Optionally, in S311, the terminal 13 may determine the available symbols of the one or more SA reserved time slots, and then detect on the available symbols of the one or more SA reserved time slots, and detect the SA The available symbols of the time slot are the available symbols of the SA target time slot.

The SA carries the DATA target slot indication information, and the DATA target slot indication information is used to indicate the DATA target slot.

Optionally, the terminal 12 may generate the available symbol indication information of the DATA target slot, the SA may further carry the available symbol indication information of the DATA target slot, and the available symbol indication information of the DATA target slot The available symbols of the DATA target slot.

S313: The terminal 13 determines an available symbol of the DATA target slot.

For example, the processor 1211 of the terminal 13 may determine the available symbols of the DATA target slot.

The available symbols of the DATA target time slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the DATA target time slot, and may refer to the available symbols of the DATA target time slot in S310. Related content.

After receiving the SA in S312, the terminal 13 may obtain the DATA target time slot indication information carried by the SA, determine the DATA target time slot according to the DATA target time slot indication information, and then determine the available symbols of the DATA target time slot.

Optionally, the fourth time domain resource configuration information indicates that the symbols included in the DATA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 13 may determine the available symbols of the DATA target time slot according to the fourth time domain resource configuration information. Optionally, other configuration information may indicate that the symbols included in the DATA target time slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 13 may also determine the available symbols of the DATA target time slot according to the other configuration information. This is not described in this embodiment of the present application. limit.

Optionally, when the SA carries the available symbol indication information of the DATA target slot, the terminal 13 may determine the available symbols of the DATA target slot according to the available symbol indication information of the DATA target slot.

S314: The terminal 12 sends DATA on the available symbols of the DATA target slot.

For example, the processor 1211 of the terminal 12 may use the antenna 1216 to send DATA on the available symbols of the DATA target time slot.

Accordingly, the terminal 13 receives DATA on the available symbols of the DATA target slot. For example, the processor 1211 of the terminal 13 may use the antenna 1216 to receive DATA on the available symbols of the DATA target slot.

The terminal 12 and the terminal 13 determine the available symbols of the SA target time slot and the available symbols of the DATA target time slot, transmit SA on the available symbols of the SA target time slot, and transmit DATA on the available symbols of the DATA target time slot, thereby implementing the NR system. In time, D2D communication is performed using time domain resources.

The following further describes how the terminal 12 determines the available symbols of the SA target slot with reference to FIGS. 4A, 4B, and 4C. FIGS. 4A, 4B, and 4C can be understood as several examples of S301 and S309. The content can be related to The contents in Figure 3 are combined with each other.

FIG. 4A is a schematic diagram of a method for the terminal 12 to determine the available symbols of the SA target slot. As shown in Figure 4A:

S4A01: The access network device 11 sends the first cell-level semi-static configuration information to the terminal 12.

S4A01 is an example of S301, that is, the first time domain resource configuration information in S301 is the first cell-level semi-static configuration information. The first cell-level semi-static configuration information is received through a system message. For other information, refer to S301. Related content.

S4A02: The terminal 12 determines the available symbols of the SA target time slot according to the first cell-level semi-static configuration information.

S4A02 is an example of S309.

The first cell-level semi-static configuration information may indicate that the symbols included in the SA target slot are uplink symbols, downlink symbols, or flexible symbols. The terminal 12 may determine the available symbols of the SA target slot according to the first cell-level semi-static configuration information.

For example, the processor 1211 of the terminal 12 may determine the available symbols of the SA target time slot according to the first cell-level semi-static configuration information.

FIG. 4B is a schematic diagram of another method for the terminal 12 to determine the available symbols of the SA target slot. As shown in Figure 4B:

S4B01: The access network device 11 sends the first cell-level semi-static configuration information to the terminal 12.

S4B01 is an example of S301, that is, the first time domain resource configuration information in S301 is the first cell-level semi-static configuration information, and reference may be made to related content in S301.

S4B02: The access network device 11 sends the first user-level configuration information to the terminal 12.

For example, the processor 1111 of the access network device 11 may send the first user-level configuration information to the terminal 12 through the antenna 1115.

The first cell-level semi-static configuration information may also be used to indicate that at least one symbol of the SA target slot is a flexible symbol, and the first user-level configuration information is used to indicate the first cell-level semi-static configuration information. The at least one flexible symbol of the SA target slot is an uplink symbol or a downlink symbol. It can be understood that the first cell-level semi-static configuration information may indicate an uplink symbol, a downlink symbol, or a flexible symbol in the SA target slot, and it is flexible for at least one of the SA target slots configured by the first cell-level semi-static configuration information. Symbol, the first user-level configuration information may indicate that the at least one flexible symbol in the SA target slot is an uplink symbol or a downlink symbol. For the uplink symbol in the SA target slot configured by the first cell-level semi-static configuration information, Downlink symbol or flexible symbol, the first user-level configuration information is not changed, that is, the uplink symbol in the SA target slot configured by the first cell-level semi-static configuration information is still configured as the uplink symbol, and the first cell-level semi-static The downlink symbol in the SA target time slot configured by the configuration information is configured as a downlink symbol.

S4B03: The terminal 12 determines the available symbols of the SA target time slot according to the first user-level configuration information.

The first user-level configuration information further configures the SA target time slot based on the first cell-level semi-static configuration information. The terminal 12 may determine the available symbols of the SA target time slot according to the first user-level configuration information.

For example, the processor 1211 of the terminal 12 may determine the available symbols of the SA target time slot according to the first user-level configuration information.

FIG. 4C is a schematic diagram of another method for the terminal 12 to determine the available symbols of the SA target slot. FIG. 4C illustrates the available symbols for determining the SA target time slot according to the first cell-level semi-static configuration information and the first user-level configuration information, as shown in FIG. 4B:

S4C01: The access network device 11 sends the first cell-level semi-static configuration information to the terminal 12.

S4C01 is an example of S301, that is, the first time domain resource configuration information in S301 is the first cell-level semi-static configuration information, and reference may be made to related content in S301.

S4C02: The access network device 11 sends the first user-level configuration information to the terminal 12.

For related content of the first user-level configuration information, refer to related content in S4B02, and details are not described herein again.

S4C03: The terminal 12 determines available symbols of the SA target time slot according to the first cell-level semi-static configuration information and the first user-level configuration information.

For example, the processor 1211 of the terminal 12 may determine the available symbols of the SA target time slot according to the first cell-level semi-static configuration information and the first user-level configuration information.

The first cell-level semi-static configuration information and the first user-level configuration information both configure the SA target slot. The available symbols of the SA target slot can be determined based on the first cell-level semi-static configuration information and the first user-level configuration information. . For example, firstly, the uplink symbol and the downlink symbol of the SA target slot are determined according to the first cell-level semi-static configuration information, and the flexible symbol configured by the first cell-level semi-static configuration information is further determined as the uplink in combination with the first user-level configuration information. Symbol, downlink symbol, or flexible symbol, and then determine the available symbols for the SA target slot.

In the above FIG. 4B and FIG. 4C, the first user-level configuration information may have multiple situations. The following describes the multiple situations of the first user-level configuration information and the content in FIG. 4B and FIG.

(1) The first user-level configuration information includes first user-level semi-static configuration information.

The first user-level semi-static configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

The first user-level semi-static configuration information is carried in an RRC message.

S4B02 may be that the access network device 11 sends the first user-level semi-static configuration information to the terminal 12, for example, the access network device 11 sends the first user-level semi-static configuration information to the terminal 12 through an RRC message; S4B03 may be that the terminal 12 The available symbols of the SA target slot are determined according to the first user-level semi-static configuration information.

S4C02 may be: the access network device 11 sends the first user-level semi-static configuration information to the terminal 12, for example, the access network device 11 sends the first user-level semi-static configuration information to the terminal 12 through an RRC message; in S4C03, the terminal 12 The first cell-level semi-static configuration information and the first user-level semi-static configuration information determine available symbols of an SA target slot.

(2) The first user-level configuration information includes first user-level dynamic configuration information.

The first user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

The first user-level dynamic configuration information is received from the access network device 11 on the GC PDCCH.

S4B02 may be that the access network device 11 sends the first user-level dynamic configuration information to the terminal 12, for example, the access network device 11 sends the first user-level dynamic configuration information to the terminal 12 through the GC PDCCH; S4B03 may be that the terminal 12 The user-level dynamic configuration information determines the available symbols for the SA target slot.

S4C02 may be that the access network device 11 sends the first user-level dynamic configuration information to the terminal 12, for example, the access network device 11 sends the first user-level dynamic configuration information to the terminal 12 through the GC PDCCH; S4C03 may be that the terminal 12 The first cell-level semi-static configuration information and the first user-level dynamic configuration information determine the available symbols of the SA target time slot.

(3) The first user-level configuration information includes first user-level semi-static configuration information and first user-level dynamic configuration information.

The first user-level semi-static configuration information is further used to indicate that at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is a flexible symbol; the first user-level dynamic configuration information The at least one flexible symbol used to indicate the SA target time slot indicated by the first user-level semi-static configuration information is an uplink symbol or a downlink symbol.

S4B02 may be that the access network device 11 sends the first user-level semi-static configuration information and the first user-level dynamic configuration information to the terminal 12, for example, the access network device 11 sends the first user-level semi-static configuration to the terminal 12 through an RRC message. Information, the access network device 11 sends the first user-level dynamic configuration information to the terminal 12 through the GC PDCCH; S4B03 may be that the terminal 12 determines the SA target time slot according to the first user-level semi-static configuration information and the first user-level dynamic configuration information. Of available symbols.

S4C02 may be that the access network device 11 sends the first user-level semi-static configuration information and the first user-level dynamic configuration information to the terminal 12, for example, the access network device 11 sends the first user-level semi-static configuration to the terminal 12 through an RRC message. Information, the access network device 11 sends the first user-level dynamic configuration information to the terminal 12 through the GC PDCCH; S4C03 may be that the terminal 12 is based on the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first A user-level dynamic configuration information determines the available symbols for the SA target slot.

FIG. 4D is a schematic diagram of another method for the terminal 12 to determine the available symbols of the SA target slot. FIG. 4D illustrates the available symbols for determining the SA target time slot according to the first user-level dynamic configuration information, as shown in FIG. 4D:

S4D01: The access network device 11 sends the first user-level dynamic configuration information to the terminal 12.

S4C01 is an example of S301, that is, the first time domain resource configuration information in S301 is the first user-level dynamic configuration information, and reference may be made to related content in S301.

The first user-level dynamic configuration information indicates that the symbols included in the first time domain resource are uplink symbols, downlink symbols, or flexible symbols, and the first time domain resources include SA target time slots. That is, the first user-level dynamic configuration information indicates that the symbols included in the SA target slot are uplink symbols, downlink symbols, or flexible symbols.

The first user-level dynamic configuration information is sent by the access network device 11 to the terminal 12 on the GC PDCCH.

S4D02: The terminal 12 determines the available symbols of the SA target time slot according to the first user-level dynamic configuration information.

Since the first user-level dynamic configuration information indicates that the symbols included in the SA target slot are uplink symbols, downlink symbols, or flexible symbols, the terminal 12 may determine the available symbols of the SA target slot according to the first user-level dynamic configuration information.

For example, the processor 1211 of the terminal 12 may determine the available symbols of the SA target time slot according to the first user-level dynamic configuration information.

The above describes how the terminal 12 determines the available symbols of the SA target slot. The following describes how the terminal 12 determines the available symbols of the DATA target slot. The following can be understood as several examples of S302 and S310. The content can be compared with the figure. The contents of 3 are combined with each other.

The available symbols determined by the terminal 12 for the DATA target time slot are similar to the available symbols determined by the terminal 12 for the SA target time slot, except that determining the available symbols of the DATA target time slot combined with the time domain resource configuration information and determining the available SA target time slot The time domain resource configuration information of the symbol combination may be different, for example, the first time domain resource configuration information that determines the available symbol of the SA target slot and the second time domain resource configuration information that determines the available symbol of the DATA target slot may be different. For the terminal 12 to determine the available symbols of the DATA target time slot, reference may be made to the content of the available symbols of the terminal 12 determining the SA target time slot.

As a first embodiment:

In S302, the second time domain resource configuration information is second cell-level semi-static configuration information; the second cell-level semi-static configuration information is received through a system message, and reference may be made to related content in S302.

In S310, the determining the available symbols of the DATA target time slot includes: determining the available symbols of the DATA target time slot according to the second cell-level semi-static configuration information.

As a second embodiment:

The method shown in FIG. 3 further includes: receiving second user-level configuration information; the second cell-level semi-static configuration information is further used to indicate that at least one symbol of the DATA target slot is a flexible symbol; the second user The level configuration information is used to indicate that the at least one flexible symbol of the DATA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

In S310, the determining the available symbols of the DATA target time slot includes: determining the available symbols of the DATA target time slot according to the second user-level configuration information.

As a third embodiment:

In S310, the determining the available symbols of the DATA target slot includes: determining the available symbols of the SA target slot according to the second cell-level semi-static configuration information and the second user-level configuration information. .

In the second embodiment and the third embodiment described above, the second user-level configuration information may have multiple situations:

(1) The second user-level configuration information includes second user-level semi-static configuration information;

The second user-level semi-static configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol;

The second user-level semi-static configuration information is carried in an RRC message.

(2) The second user-level configuration information includes second user-level dynamic configuration information;

The second user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol; the second user-level Dynamic configuration information is received on the GC and PDCCH.

(3) The second user-level configuration information includes second user-level semi-static configuration information and second user-level dynamic configuration information;

The second user-level semi-static configuration information is further used to indicate that at least one flexible symbol of the SA target slot indicated by the second cell-level semi-static configuration information is a flexible symbol; the second user-level dynamic configuration information The at least one flexible symbol used to indicate the SA target slot indicated by the second user-level semi-static configuration information is an uplink symbol or a downlink symbol; the second user-level dynamic configuration information is in a group common physical downlink Received on the control channel GC PDCCH.

As a fourth implementation mode:

In S302, the second time-domain resource configuration information is second user-level dynamic configuration information; the second user-level dynamic configuration information is received from the access network device on a GC PDCCH.

In S310, the determining the available symbols of the DATA target slot includes: determining the available symbols of the SA target slot according to the second user-level dynamic configuration information.

The available symbols determined by the terminal 13 for the SA target slot are similar to the available symbols determined by the terminal 12 for the SA target slot, except that (1) after the terminal 13 receives the SA slot resource pool indication information, the SA slot resource The pool indication information may indicate one or more SA reserved time slots. The one or more SA reserved time slots may include an SA target time slot. The terminal 13 may not know which of the one or more SA reserved time slots. The time slot is an SA target time slot. The terminal 13 may determine that the one or more SA reserved time slots are SA target time slots and determine the available symbols of the SA target time slot. (2) The terminal 13 determines the available SA target time slots. The combination of time domain resource configuration information of the symbol and the available time domain resource configuration information of the terminal 12 determining the SA target time slot may be different. For example, the terminal 13 determines the third time domain resource configuration information of the available symbol of the SA target time slot and the terminal. 12 The first time domain resource configuration information for determining the available symbols of the SA target slot may be different. For the available symbols of the SA target slot determined by the terminal 13, reference may be made to the content of the available symbols of the SA target slot determined by the terminal 12. For example, the terminal 12 in FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D may be replaced with the terminal 13, Replace the first with the third.

The available symbols for the DATA target time slot determined by the terminal 13 are similar to the available symbols for the DATA target time slot determined by the terminal 12. The difference is that the time domain resource configuration information combined with the available symbols for the DATA target time slot determined by the terminal 13 is determined by the terminal 12 The time domain resource configuration information combined with the available symbols of the DATA target time slot may be different, for example, the fourth time domain resource configuration information of the terminal 13 determining the available symbols of the DATA target time slot and the terminal 12 determining the second available resource symbols of the DATA target time slot. The time domain resource configuration information can be different. For the available symbols of the DATA target slot determined by the terminal 13, reference may be made to the content of the available symbols of the DATA target slot determined by the terminal 12. For example, the second of the contents of the available symbols of the DATA target slot determined by the terminal 12 may be replaced by the fourth. For example, the processor 1211 of the terminal 13 may determine the available symbols of the DATA target slot.

Optionally, when the SA in S312 carries the available symbol indication information of the DATA target slot, the terminal 13 may determine the available symbols of the DATA target slot according to the available symbol indication information of the DATA target slot. For example, the processor 1211 of the terminal 13 may determine the available symbols of the DATA target time slot according to the available symbol indication information of the DATA target time slot.

The following describes the cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information that appear in the implementation of this application with examples.

Before the access network device 11 sends the cell-level semi-static configuration information, the user-level semi-static configuration information, or the user-level dynamic configuration information to the terminals 12 and 13, the terminal 12 and the terminal 13 may allocate multiple bandwidth parts (Bandwidth part, BWP), the BWPs of the terminal 12 and the terminal 13 may be the same or different, and each BWP has a subcarrier interval.

BWP is a continuous or discontinuous resource in the frequency domain. For example, BWP can be K (K is an integer greater than or equal to 1) subcarriers; or, BWP can be M (M is an integer greater than or equal to 1) continuous or non-contiguous Consecutive resource blocks (RBs); or, the BWP may be N (N is an integer greater than or equal to 1) consecutive or non-continuous resource block groups (RBGs), where one RBG may include multiple One RB may include multiple subcarriers. For example, one RBG may include two, four, eight, or sixteen RBs, and one RB includes twelve subcarriers. BWP can belong to paired spectrum (unpaired spectrum) or unpaired spectrum (unpaired spectrum). BWP can also be called subband, narrowband, bandwidth resource, frequency domain resource part, part of frequency domain resource, part of frequency resource, part of frequency resource. , Carrier BWP or other names, this application is not limited.

For example, the access network device 11 allocates two BWPs to the terminal 12, which are BWP1 and BWP2, respectively. The subcarrier interval of BWP1 is 30kHz, and the subcarrier interval of BWP2 is 60kHz. The access network device 11 can assign BWP1 to the terminal 13 and the subcarrier interval of BWP1 is 30 kHz. For the convenience of description, the access network device 11 assigns BWP1 to both the terminal 12 and the terminal 13 as an example. It should be noted that The BWP allocated by the access network device 11 to the terminal 12 and the terminal 13 may be the same or different, which is not limited in the embodiment of the present application.

After the access network device 11 allocates the BWP to the terminal 12, the access network device 11 may determine the cell-level semi-static configuration information, the user-level semi-static configuration information, or the user-level dynamic configuration information by referring to the time domain resources corresponding to the subcarrier interval. For example, the reference subcarrier interval may be less than or equal to the subcarrier intervals of all BWPs of the terminal 12. The reference subcarrier intervals of each other in the cell-level semi-static configuration information, the user-level semi-static configuration information, or the user-level dynamic configuration information may be the same or different.

I. Cell-level semi-static configuration information

The cell-level semi-static configuration information may indicate that a time domain resource period symbol is an uplink symbol, a downlink symbol, or a flexible symbol. For example, the time domain resource period may be 0.125 ms, 0.25 ms, 0.5 ms, 1 ms, 2 ms, 2.5 ms, and 5 ms. Or 10ms and so on.

The cell-level semi-static configuration information may include the reference subcarrier interval, the time domain resource period, and the time domain resource allocation information corresponding to the reference subcarrier interval. The time domain resource allocation information corresponding to the reference subcarrier interval includes the number of downlink time slots and downlink symbols. , The number of uplink slots, and the number of uplink symbols, for example, the number of downlink slots is m, the number of downlink symbols is x, the number of uplink slots is n, and the number of uplink symbols is y.

The time-domain resources indicated by the cell-level semi-static configuration information can be determined in the manner of downlink time-domain resources-flexible time-domain resources-uplink time-domain resources, as shown in FIG. 5A. In FIG. Domain resources, such as grid-shaped resources represent downlink time-domain resources, dots represent flexible time-domain resources, and diagonal lines represent uplink time-domain resources. For example, the downlink time domain resource includes m time slots and x symbols after m time slots. The uplink time domain resource may include n time slots and y symbols before n time slots. The flexible time domain resource may be downlink The continuous time domain resources among the time domain resources and the uplink time domain resources may include continuous flexible time slots and continuous flexible symbols before and after the flexible time slots.

After receiving the cell-level semi-static configuration information, the terminal may determine the time domain resource allocation corresponding to the sub-carrier interval of the BWP according to the cell-level semi-static configuration information and the relationship between the sub-carrier interval and the reference sub-carrier interval of the BWP.

The following uses the first cell-level semi-static configuration information as an example for description. The access network device 11 can broadcast the first cell-level semi-static configuration information.

For example, the first cell-level semi-static configuration information includes time domain resource allocation information corresponding to a reference subcarrier interval of 15 kHz, a time domain resource period of 5 ms, and a reference sub carrier interval, and the time domain resource allocation information corresponding to the reference sub carrier interval. For: the number of downlink slots is one, the number of downlink symbols is three, the number of uplink slots is one, and the number of uplink symbols is four.

FIG. 5B is a schematic diagram of time domain resources indicated by the first cell-level semi-static configuration information. An example is described in which a time slot includes 14 symbols. It should be noted that a time slot may include other numbers of symbols, such as 12, 6, or 7, which is not limited in the embodiment of the present application.

The first time domain resource is 5ms, with a total of 5 time slots, each time slot occupies 1ms, the first time slot (for the convenience of description, the nth time slot is hereinafter referred to as time slot n, n is greater than or equal to 1 (Integer) is a downlink slot; the first 3 symbols of slot 2 are downlink symbols, the last 11 symbols of slot 2 are flexible symbols; slot 3 is a flexible slot; the first 10 symbols of slot 4 are flexible symbols , The last 4 symbols are uplink symbols; time slot 5 is the uplink time slot.

After receiving the first cell-level semi-static configuration information, the terminal 12 may determine the allocation of time domain resources corresponding to the BWP1 subcarrier interval.

The reference subcarrier interval is 15kHz and the BWP1 subcarrier interval is 30kHz, then the 1 symbol corresponding to the reference subcarrier interval corresponds to the 2 symbols corresponding to the BWP1 subcarrier interval, and the 1 slot corresponding to the reference subcarrier interval corresponds to the BWP1 subcarrier. Carrier interval corresponds to 2 time slots.

As shown in Figure 5B, for BWP1, within a configuration period of 5ms, there are 10 time slots in total, each time slot occupies 0.5ms, of which time slot 1 and time slot 2 are downlink time slots; the first 6 of time slot 3 Symbols are downlink symbols, and the last 8 symbols of time slot 3 are flexible symbols; time slots 4, time slots 5, 6 and 7 are flexible time slots; the first 6 symbols of time slot 8 are flexible symbols, The last 8 symbols are uplink symbols; time slots 9 and 10 are uplink time slots.

User-level semi-static configuration information

The user-level semi-static configuration information may indicate that symbols included in a time domain resource are uplink symbols, downlink symbols, or flexible symbols. For example, the time domain resource may be one or more consecutive or discontinuous time slots.

The user-level semi-static configuration information can further configure the time slot configured by the cell-level semi-static configuration information. The cell-level semi-static configuration information can indicate that at least one symbol of the time slot is a flexible symbol. The user-level semi-static configuration information can be Configure at least one flexible symbol of the time slot configured by the cell-level semi-static configuration information. For example, the user-level semi-static configuration information may indicate that the at least one flexible symbol is an uplink symbol or a downlink symbol. The user-level semi-static configuration information may be The uplink symbol or downlink symbol of the time slot configured by the cell-level semi-static configuration information is still configured as an uplink symbol or a downlink symbol. Alternatively, the time slot configured by the user-level semi-static configuration information may not be configured by the cell-level semi-static configuration information.

The user-level semi-static configuration information may configure time domain resources at a reference sub-carrier interval, and the reference sub-carrier interval may be the same as the sub-carrier interval of the cell-level semi-static configuration information.

The user-level semi-static configuration information may include an index of at least one time slot and the number of downlink symbols and the number of uplink symbols in the at least one time slot. The index of the at least one time slot may be a cell-level semi-static configuration information configuration. The index of the time slot in the time domain resource or its position relative to the current time slot, such as the current time slot, the next time slot of the current time slot, or the second time slot after the current time slot, etc.

FIG. 5C is a schematic diagram of a time domain resource indicated by user-level semi-static configuration information, as shown in FIG. 5C. The user-level semi-static configuration information may indicate one or more time slots, and each time slot may be determined according to a downlink symbol-flexible symbol-uplink symbol. The flexible symbol is a symbol between a downlink symbol and an uplink symbol.

After receiving the user-level semi-static configuration information, the terminal may determine the time domain resource allocation corresponding to the sub-carrier interval of the BWP according to the user-level semi-static configuration information and the relationship between the sub-carrier interval and the reference sub-carrier interval of the BWP.

The following uses the first user-level semi-static configuration information as an example for description. The access network device 11 may send the first user-level semi-static configuration information to the terminal 12 and the terminal 13 through an RRC message, respectively.

For example, the first user-level semi-static configuration information includes: slot 3, the number of downlink symbols is two, and the number of uplink symbols is three.

FIG. 5D is a schematic diagram of time domain resources indicated by the first user-level semi-static configuration information.

The first two symbols of slot 3 corresponding to the reference subcarrier interval are downlink symbols, the third to eleventh symbols of slot 3 are flexible symbols, and the last three symbols are uplink symbols.

The terminal 12 or the terminal 13 may determine the time slot corresponding to the reference subcarrier interval 3 and the time slot corresponding to the BWP1 subcarrier interval according to the first cell-level semi-static configuration information and / or the relationship between the subcarrier interval of the BWP1 and the reference subcarrier interval. 5 and time slot 6, the terminal 12 knows that the first 4 symbols of time slot 5 are downlink symbols, the last 10 symbols of time slot 5 are flexible symbols, the first 8 symbols of time slot 6 are flexible symbols, The 6 symbols are ascending symbols.

User-level dynamic configuration information

The user-level dynamic configuration information may indicate that a symbol of a time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. For example, the time domain resource may be one or more continuous or discontinuous time slots.

The user-level dynamic configuration information can further configure the time domain resources configured by the cell-level semi-static configuration information. The cell-level semi-static configuration information can indicate that at least one symbol of a time slot is a flexible symbol. The user-level dynamic configuration information can At least one flexible symbol of the time slot configured by the cell-level semi-static configuration information is configured. For example, the user-level dynamic configuration information may indicate that the at least one flexible symbol is an uplink symbol or a downlink symbol. The user-level dynamic configuration information may change the cell-level The uplink symbol or downlink symbol of the time slot configured by the semi-static configuration information is still configured as an uplink symbol or a downlink symbol. For example, the time domain resources corresponding to the uplink BWP and downlink BWP of the unpaired spectrum can be configured through cell-level semi-static configuration information first, and then can be configured through user-level dynamic configuration information.

The user-level dynamic configuration information can further configure the time domain resources configured by the user-level semi-static configuration information. The user-level semi-static configuration information can indicate that at least one symbol of a time slot is a flexible symbol. The user-level dynamic configuration information can Configure at least one flexible symbol of the time slot configured by user-level semi-static configuration information. For example, user-level dynamic configuration information may indicate that the at least one flexible symbol is an uplink symbol or a downlink symbol. User-level dynamic configuration information may The uplink symbol or downlink symbol of the time slot configured by the semi-static configuration information is still configured as an uplink symbol or a downlink symbol. For example, the time domain resources corresponding to the uplink BWP and downlink BWP of the unpaired spectrum can be configured through user-level semi-static configuration information first, and then can be configured through user-level dynamic configuration information.

User-level dynamic configuration information can configure time domain resources that have not been configured with cell-level semi-static configuration information or user-level semi-static configuration information, that is, a time-domain resource that does not pass cell-level semi-static configuration information and user-level Semi-static configuration information is used for configuration, which is directly configured through user-level dynamic configuration information. For example, the time domain resources corresponding to the uplink BWP and downlink BWP of the paired spectrum can be passed without cell-level semi-static configuration information or user-level semi-static configuration Information configuration, directly configured through user-level dynamic configuration information.

The user-level dynamic configuration information may configure time domain resources at a reference subcarrier interval. The reference subcarrier interval may be the same as the reference subcarrier interval of the cell-level semi-static configuration information or the same as the reference subcarrier interval of the user-level semi-static configuration information. For example, the reference subcarrier interval here is 15kHz.

The access network device 11 sends user-level dynamic configuration information to the terminal 12 or the terminal 13 on the physical channel. For example, the access network device 11 may send downlink control information (DCI) on a physical downlink control channel (PDCCH). The PDCCH may be a group common (GC) PDCCH. The DCI The format can be 2. Optionally, before sending the DCI on the PDCCH, the access network device 11 may send the frequency domain resources, time domain resources, and descrambling sequences for detecting the DCI to the terminal 12. The terminal 12 receives the DCI using the descrambling sequence on the frequency domain resource and the time domain resource accordingly.

The user-level dynamic configuration information may include SF combination index information. The SF combination index information may indicate SF combinations. The SF combination may indicate 1, 2, or more SF indexes. The SF index may indicate SF. The SF may indicate one time. Each symbol in the slot is an uplink symbol, a downlink symbol, or a flexible symbol.

The following describes how the SF combination index information indicates the SF combination and how the SF combination indicates one, two, or more SF indexes.

The terminal and the access network device may configure a correspondence relationship between the SF combination index and the SF combination. For example, the access network device 11 may send the correspondence relationship between the SF combination index and the SF combination to the terminal 12 through RRC signaling. For example, the correspondence between the SF combination index and the SF combination can be shown in Table 1 below. It should be noted that Table 1 is only a manifestation of the correspondence relationship between the SF combination index and the SF combination. The correspondence between the SF combination index and the SF combination The relationship may be expressed in other forms such as a character string or a formula, which is not limited in the embodiment of the present application.

SF组合索引SF Combination Index	SF组合SF combination
00	00
11	24,4524,45
22	0,270,27
······	······

Table 1

As shown in Table 1, the SF combination index information may indicate SF combination information, the SF combination information may indicate 1, 2, or more SF indexes, and the 1, 2, or more SF indexes may indicate 1 respectively. SFs of 2 or more time slots, for example, the first SF index of the SF combination may indicate the SF of the first time slot corresponding to the reference subcarrier interval, and the second SF index indicates the corresponding SF of the reference subcarrier interval. SF in the second slot, and so on. Here, the current first time slot can be understood as the current time slot or the next time slot of the current time slot, and the second time slot can be understood as the time slot immediately after the first time slot. This application implements The example does not limit this. In the embodiment of the present application, the first time slot is used as an example for description.

The following uses the first user-level dynamic configuration information as an example for description. The access network device 11 may send the first user-level dynamic configuration information to the terminal 12 or the terminal 13.

For example, the first user-level dynamic configuration information may include SF combination index 1, which may indicate SF combination. The SF combination indicates two SF indexes, which are 24 and 45, and SF index 24 may indicate the reference subcarrier interval. The corresponding SF of the current time slot, and the SF index 45 may indicate the SF of the next time slot of the current time slot corresponding to the reference subcarrier interval. For example, terminal 12 receives user-level dynamic configuration information at time slot 2 corresponding to the reference subcarrier interval of 15 kHz (it can also be understood that terminal 12 receives user-level dynamic configuration at time slot 3 or time slot 4 corresponding to the BWP1 subcarrier interval. Information), then time slot 2 is the current time slot, time slot 3 is the next time slot of the current time slot, SF index 24 may indicate the SF of time slot 2 and SF index 45 may indicate the SF of time slot 3.

How the SF index indicates the SF and how the SF indicates that each symbol in a slot is an uplink symbol, a downlink symbol, or a flexible symbol will be further described below.

The access network device and terminal can be configured with the corresponding relationship between the SF index and the SF. For example, the access network device 11 and the terminal 12 can be configured with the corresponding relationship between the SF index and the SF. For example, the access network device 11 and the terminal can be statically written. 12. For example, the correspondence between SF index and SF can be shown in Table 2. It should be noted that Table 2 is only a manifestation of the correspondence between SF index and SF, and the correspondence between SF index and SF can be expressed as a string. Or in other forms such as formulas, this embodiment of the present application does not limit this.

As shown in Table 2, one SF index can indicate one SF, and one SF can indicate that the symbols included in a time slot are downlink symbols, flexible symbols, or uplink symbols. Among them, SF can be based on downlink number-flexible symbol-uplink. The way of symbols indicates the symbols included in the time slot.

For example, the SF index 24 can indicate that the first 3 symbols in a time slot are downlink symbols, the middle 9 symbols are flexible symbols, the last 2 symbols are uplink symbols, and the SF index 45 can indicate the first 6 symbols in a time slot. It is a downlink symbol, the middle 2 symbols are flexible symbols, and the last 6 symbols are uplink symbols. For example, FIG. 5E is a schematic diagram of the time domain resources indicated by the first user-level dynamic configuration information. As shown in FIG. 5E, the first 3 symbols of slot 2 corresponding to the reference subcarrier interval are downlink symbols and the middle 9 symbols It is a flexible symbol. The last two symbols are uplink symbols. The SF index 45 can indicate that the first six symbols in slot 3 corresponding to the reference subcarrier interval are downlink symbols, the middle two symbols are flexible symbols, and the last six symbols are uplink symbols. .

After receiving the user-level dynamic configuration information, the terminal 12 may determine the time domain resource allocation corresponding to the sub-carrier interval of BWP1 according to the user-level dynamic configuration information and the relationship between the sub-carrier interval and the reference sub-carrier interval of BWP1.

For example, the terminal 12 may determine the time slot 2 corresponding to the reference subcarrier interval and the time slot 3 and time corresponding to the BWP1 subcarrier interval according to the first user-level dynamic configuration information and / or the relationship between the subcarrier interval and the reference subcarrier interval of BWP1. Slot 4, slot 3 corresponding to the reference subcarrier interval corresponds to slot 5 and slot 6 corresponding to the BWP1 subcarrier interval, then as shown in FIG. 5E, the first 6 symbols of slot 3 are downlink symbols, and slot 3 The next 8 symbols are flexible symbols; the first 10 symbols of time slot 4 are flexible symbols; the last 4 symbols of time slot 4 are uplink symbols; the first 12 symbols of time slot 5 are downlink symbols; 2 symbols are flexible symbols; the first 2 symbols of slot 6 are flexible symbols, and the last 12 symbols are uplink symbols.

The solution of the embodiment of the present application will be described below with reference to a specific D2D communication mode, and its content may be combined with the content in FIG. 3, FIG. 4A to FIG. 4D above.

It should be noted that the embodiments of the present application can be applied to various modes of D2D communication, such as mode 1, mode 2, mode 3, and mode 4. For the convenience of description, the following uses mode 1 and mode 2 as examples to explain. The skilled person can understand that the following scheme is also applicable to other modes, such as mode 3 and mode 4. The following uses the terminal 12 as a D2D sending end and the terminal 13 as a D2D receiving end as an example for description.

FIG. 6 is a schematic diagram of another method for performing D2D communication using time domain resources in an NR system. FIG. 6 combines mode 1 with an example in which the terminal 12 is a D2D transmitting end and the terminal 13 is a D2D receiving end. When the terminal 12 is located in the coverage area of the access network device 11 and the terminal 12 and the access network device are in an RRC connection state, the access network device 11 may determine that the terminal 12 uses the mode 1 for D2D communication.

S601: The access network device 11 broadcasts the first cell-level semi-static configuration information.

S601 may be an example of S301-S304 in FIG. 3, and it may be understood that the first time domain resource configuration information, the second time domain resource configuration information, the third time domain resource configuration information, and the fourth time domain resource in FIG. 3 The configuration information is the same, and the first time domain resource configuration information is the first cell-level semi-static configuration information.

Based on FIG. 3, FIG. 6 may further include S602-S605. In combination with the content of FIGS. 3 to 4D, it can be understood as the first user-level semi-static information and the second user-level semi-static configuration in FIGS. 3 to 4D. Information, third user-level semi-static configuration information, and fourth user-level semi-static configuration information may be the same, first user-level dynamic information, second user-level dynamic configuration information, third user-level dynamic configuration information, and fourth user-level dynamic information. The configuration information can be the same.

For example, as shown in FIG. 5B, the first cell-level semi-static configuration information configures time slot 1, time slot 2, time slot 3, time slot 4, and time slot 5 corresponding to the reference subcarrier interval, that is, the BWP1 subcarrier interval corresponds to Time slot 1, time slot 2, time slot 3 ... and time slot 10.

S602: The access network device 11 sends the first user-level semi-static configuration information to the terminal 12.

For example, as shown in FIG. 5D, the first user-level semi-static configuration information configures time slot 3 corresponding to the reference subcarrier interval, that is, time slot 5 and time slot 6 corresponding to the BWP1 subcarrier interval.

S603: The access network device 11 sends the first user-level semi-static configuration information to the terminal 13.

S604: The access network device 11 sends the first user-level dynamic configuration information to the terminal 12.

For example, as shown in FIG. 5E, the first user-level dynamic configuration information configures timeslots 2 and 3 corresponding to the reference subcarrier interval, that is, timeslots 3, 4, 4, and 5 corresponding to the BWP1 subcarrier interval. Time slot 6.

S605: The access network device 11 sends the first user-level dynamic configuration information to the terminal 13.

For the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information in S601-S605, reference may be made to related content in FIGS. 3 to 5E, and details are not described herein again.

Optionally, S601-S605 illustrate the configuration of the access network device 11 through cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. Those skilled in the art can understand that The network access device 11 can be directly configured by user-level dynamic configuration information, or the access network device 11 can be configured only by cell-level semi-static configuration information and user-level semi-static configuration information, or the access network device 11 can be configured by only the user Level semi-static configuration information for configuration, etc., the principles and solutions of the embodiments of the present application are also applicable, and there is no limitation on this. For example, the time domain resources corresponding to the uplink BWP and downlink BWP of unpaired spectrum can be configured by using cell-level semi-static configuration information first, and then using one of user-level semi-static configuration information and user-level dynamic configuration information or Two types of configuration are performed; the time domain resources corresponding to the uplink BWP and downlink BWP of the paired spectrum can be directly configured through user-level dynamic configuration information.

S606: The access network device 11 broadcasts SA slot resource pool indication information.

Accordingly, the terminal 12 and the terminal 13 may receive SA slot resource pool indication information.

The SA slot resource pool indication information may indicate one or more SA reserved slots, and the one or more SA reserved slots include an SA target slot.

The reserved time slot of the SA can be understood as a time slot reserved for transmitting the SA. Here, the transmission can be understood as sending or receiving. For example, the terminal 12 is a D2D transmitting end. For the terminal 12, the reserved time slot of the SA can be understood as The time slot reserved for transmitting the SA; the terminal 13 is a D2D receiving end. For the terminal 13, the time slot reserved for the SA can be understood as a time slot reserved for receiving the SA. Optionally, when at least one symbol in a time slot is reserved for transmitting SA, it can be understood that the time slot is reserved for transmitting SA, and the time slot is reserved for SA.

The following describes how to determine the SA reserved time slot and how to determine the SA time slot resource pool instruction information of the access network device 11.

Optionally, before the access network device 11 determines a reserved time slot for transmitting the SA, the system 10 may configure a type of time domain resource for transmitting the SA. For example, the type of time domain resource for transmitting the SA may include the following: Several:

The first SA time domain resource type: uplink symbols can be used for SA communication. When all symbols in the time slot are uplink symbols, the time slot can be used for SA communication; or, if the time slots are not all uplink symbols, the uplink symbols in the time slot can be used for SA communication; or,

The second type of SA time domain resources: flexible symbols can be used for SA communication. When all symbols in the time slot are flexible symbols, the time slot can be used for SA communication; or, if the time slots are not all flexible symbols, the flexible symbols in the time slot can be used for SA communication; or,

The third type of SA time domain resources: uplink symbols and flexible symbols can be used for SA communication. When all symbols in the timeslot are uplink symbols or flexible symbols, the timeslot can be used for SA communication, or the timeslot includes uplink symbols and / or flexible symbols and downlink symbols, and the uplink symbols and / or in the timeslot Flexible symbols can be used for SA communication. Here the uplink symbol and / or flexible symbol can be understood to include the following three cases: (1) uplink symbol; (2) flexible symbol; (3) uplink symbol and flexible symbol.

For ease of explanation, the embodiments of the present application are described by using the three types of SA time domain resources. Those skilled in the art can understand that the type of SA time domain resources may be other types. For example, the type of SA time domain resources is uplink. Time slot, that is, only when all symbols in the time slot are uplink symbols, the time slot is used for SA communication; or, the type of the SA time domain resource is a flexible time slot, that is, only when all symbols in the time slot are When both are flexible symbols, this time slot is used for SA transmission. The content in the embodiments of the present application is also applicable to other types of time domain resources for transmitting SA, which is not limited.

(1) The access network device 11 determines the SA reserved time slot

For example, the processor 1111 of the access network device 11 may determine the SA reserved time slot.

Optionally, when determining the SA reserved time slot, the access network device 11 may determine the SA reserved time slot by using the information of the first cell-level semi-static configuration. After receiving the SA time slot resource pool information, the terminal may further The SA reserved time slot is determined according to the user-level semi-static configuration and / or user-level dynamic configuration information of the terminal 12 or the terminal 13.

Because the user-level semi-static configuration and dynamic configuration are for the terminal, and the cell-level semi-static configuration is for the cell, the user-level semi-static and dynamic configuration for different terminals may be different. The cell-level semi-static configuration of the terminals in a cell can be It is the same. By determining the SA reserved time slot by the access network device 11 based on the cell-level semi-static configuration information, the access network device 11 can be prevented from determining the SA based on the user-level semi-static configuration and user-level dynamic configuration of a certain terminal. The problem that the gap resource pool is not applicable to other terminals. Those skilled in the art can understand that the access network device 11 may determine the SA reserved time slot and broadcast the SA time slot resource pool information by combining user-level semi-static configuration and dynamic configuration, for example, combining the user-level semi-static configuration and dynamic of the sending end. The configuration determines the SA reserved time slot and broadcasts the SA time slot resource pool information, which is not limited in this embodiment of the present application.

Optionally, when determining the reserved time slot for the SA, the access network device 11 may use the time slot corresponding to the reference subcarrier interval as a unit, and the reference subcarrier interval may be the same as the cell-level semi-static configuration information and the user-level half The reference subcarrier interval of the static configuration information or the user-level dynamic configuration information is the same or different. The following example is used to determine that the reference subcarrier interval of the SA reserved slot is the same as the reference subcarrier interval of the cell-level semi-static configuration. . It should be noted that when determining the reserved time slot of the SA, the access network device 11 may use a time slot corresponding to a different reference subcarrier interval configured semi-statically or dynamically, for example, a subcarrier interval corresponding to 30 kHz. The time slot is not limited in this application. The access network device 11 may carry the reference subcarrier interval corresponding to the SA slot resource pool in a broadcast message; or send it to the terminal through other RRC signaling; or the access network device 11 may determine the SA reservation in advance with the terminal The reference subcarrier interval of the time slot is the same as the reference subcarrier interval of the cell-level semi-static configuration, or the access network device 11 may determine the reference subcarrier interval of the SA reserved time slot to a specific value by default configuration with the terminal, for example, 15 kHz Or in other ways, this embodiment of the present application does not limit this.

The access network device 11 determines the SA reserved time slot by using the time slot corresponding to the reference subcarrier interval, and then broadcasts the SA slot resource pool indication information. The received terminal can use the reference subcarrier interval and the BWP subcarrier interval of the terminal. The relationship between the BWP subcarrier interval and the SA reserved time slot is determined, thereby preventing the access network device from issuing the SA reserved time slot corresponding to each BWP subcarrier interval, saving air interface resources and reducing the access network. The burden of the equipment and the design complexity of the system 10.

With the first D2D time domain resource type, the uplink symbol can be used for D2D communication. After the uplink and downlink time domain resources are configured semi-statically at the cell level, the access network device 11 first determines which slot corresponds to the reference subcarrier interval, and at least one of the time slots satisfies the uplink symbol, and then determines whether the uplink symbol It is reserved for transmitting SA. When the uplink symbol is reserved for transmitting SA, the time slot to which the uplink symbol belongs is the reserved time slot of the SA. The scheduling situation here may include scheduling of time domain resources of the cellular service and D2D service or real-time load conditions. For example, when the demand of the cellular service is large or the real-time load is heavy, more time domain resources may be allocated to the cellular communication. For example, when there are many D2D-supporting terminals in the cell or the real-time load of D2D services is heavy, more time-domain resources can be allocated to D2D communication. According to the above-mentioned scheduling situation, the access network device 11 can determine the uplink symbol reservation. Whether it is cellular communication or SA transmission or data (DATA) transmission.

For example, referring to FIG. 5B, the access network device 11 determines that the reference subcarrier interval corresponds to the time slot 4 and the time slot 5 satisfy at least one symbol as an uplink symbol. The access network device 11 determines the uplink of the time slot 4 according to the scheduling situation. Symbols (that is, the last 4 symbols of time slot 4) are reserved for SA transmission, and uplink symbols of time slot 5 (that is, all symbols of time slot 5) are reserved for transmitting DATA, then time slot 4 is a reserved time slot for SA .

With the second SA time domain resource type, flexible transmission can be used for SA transmission. Similar to the first type of SA time domain resources above, the access network device 11 can determine which time slots in the time domain resources configured by the first cell-level semi-static configuration information correspond to the intervals of the reference subcarriers and that meet at least one symbol. It is a flexible symbol, and then decides whether the flexible symbol is reserved for transmitting SA according to the scheduling situation. When the flexible symbol is reserved for transmitting SA, the time slot to which the flexible symbol belongs is the reserved time slot of the SA.

For example, referring to FIG. 5B, the access network device 11 determines that the corresponding subcarrier interval corresponds to that at least one of timeslot 2, slot 3, and slot 4 is a flexible symbol. When the access network device 11 determines according to the scheduling situation, The flexible symbols of slot 2 (that is, the last 11 symbols of slot 2), the flexible symbols of slot 3 (that is, all symbols of slot 3), and the flexible symbols of slot 4 (that is, the first 11 symbols of slot 4) are reserved for For D2D communication, the flexible symbols of time slot 2 (that is, the last 11 symbols of time slot 2), the flexible symbols of time slot 3 (that is, all symbols of time slot 3) are reserved for transmitting DATA, and the flexible symbols of time slot 4 (immediate The first 11 symbols of slot 4) are reserved for transmission of SA, then time slot 4 is a reserved time slot for SA.

By adopting the third type of SA time domain resources, the flexible symbols and uplink symbols of the time slot can be used for SA transmission. Similar to the first SA time domain resource type and the second SA time domain resource type above, the access network device 11 can determine the interval corresponding to the reference subcarrier among the time domain resources configured by the first cell-level semi-static configuration information. , Which time slots satisfy at least one symbol as an uplink symbol or a flexible symbol, and then determine whether the uplink symbol or flexible symbol is reserved for transmitting SA according to the scheduling situation. When the uplink symbol or flexible symbol is reserved for transmitting SA, the The time slot to which the uplink symbol or flexible symbol belongs is a reserved time slot of the SA.

For example, referring to FIG. 5B, the access network is that the device 11 determines that the corresponding subcarrier interval corresponds to the reference subcarrier interval. Slot 2, Slot 3, Slot 4, and Slot 5 satisfy at least one symbol as an uplink symbol or a flexible symbol. The access network The device 11 determines that uplink symbols and / or flexible symbols (that is, all symbols of time slot 4) of time slot 4 are reserved for SA transmission according to the scheduling situation, and then time slot 4 is a reserved time slot of SA. Optionally, the access network device 11 determines the uplink symbol and / or flexible symbol of slot 2 (that is, the last 11 symbols of slot 2) and the uplink symbol and / or flexible symbol of slot 3 (that is, slot 3 according to the scheduling situation). All symbols) and uplink symbols and / or flexible symbols of slot 5 (ie all symbols of slot 5) are reserved for DATA transmission.

(2) Access network device 11 determines SA slot resource pool indication information

For example, the processor 1111 of the access network device 11 may determine the SA reserved slot pool indication information.

The following description uses a third type of SA time domain resource as an example. Those skilled in the art may know that when resources configured for SA communication are configured in the other manners described above, the following content is also applicable, and this embodiment of the present application does not limit this.

The indication information of the SA slot resource pool may indicate the SA reserved time slot. For example, the indication of the SA reserved time slot indicates the SA reserved time slot. For example, the indication information of the SA time slot resource pool may be a bitmap or a bit. Graph instructions.

As a first implementation manner, a bitmap may indicate whether a time slot corresponding to a reference subcarrier interval in a time domain resource configured by the first cell-level semi-static configuration information is a reserved time slot for the SA, for example, a bitmap in the bitmap. The bits indicate whether a time slot corresponding to the reference subcarrier interval is a reserved time slot of the SA.

For example, using the third D2D time domain resource type, in the time domain resource configured by the cell-level semi-static configuration information, the time slot corresponding to the reference subcarrier interval is time slot 1, time slot 2, time slot 3, time slot 4, and Time slot 5, this bitmap can be 00010. The bits of this bitmap indicate whether time slot 1, time slot 2, time slot 3, time slot 4 and time slot 5 are reserved time slots for SA, in which the fourth bit When it is 1, it indicates that time slot 4 is a reserved time slot for SA; when the first bit is 0, it indicates that time slot 1 is not a reserved time slot for SA; when the second bit is 0, it indicates that time slot 2 is not a reserved time slot for SA ; The third bit is 0, which indicates that time slot 3 is not a reserved time slot for the SA; the fifth bit is 0, which indicates that time slot 5 is not a reserved time slot for the SA.

As a second implementation manner, a bitmap may indicate whether a time slot corresponding to the SA time domain resource type corresponding to the reference subcarrier interval in the time domain resource configured by the cell-level semi-static configuration information is a reserved time slot for the SA. A bit in the figure indicates whether a time slot corresponding to the SA time domain resource type corresponding to the reference subcarrier interval is a reserved time slot of the SA.

For example, the third SA time domain resource type is adopted, and the time slots conforming to the SA time domain resource type are time slot 2, time slot 3, time slot 4, and time slot 5. The bitmap can be 0010. The bits of this bitmap indicate whether time slot 2, time slot 3, time slot 4, and time slot 5 are reserved time slots for SA. The third bit is 1, which indicates that time slot 4 is SA reserved time slot; the first bit is 0, indicating that time slot 2 is not a reserved time slot of the SA; the second bit is 0, indicating that time slot 3 is not a reserved time slot of the SA; the fourth bit is 0, indicating that Time slot 5 is not a reserved time slot for the SA.

S607: The terminal 12 and the terminal 13 establish synchronization.

S608: The terminal 12 sends a scheduling request (SR) to the access network device 11.

S609: The access network device 11 sends DCI 0 to the terminal 12.

The access network device 11 assigns authorization to the terminal 12 through DCI0.

S610: The terminal 12 sends a ProSe buffer status report (Buffer Status Report, BSR) to the access network device 11.

ProSe BSR can be used to indicate the group ID of the group to which the terminal 12 belongs, and the mapping relationship between the group ID and the group index.

S611: The access network device 11 sends DCI5 to the terminal 12. The DCI5 includes scheduling instruction (Scheduling Assignment, SA) target time slot indication information and data (DATA) target time slot indication information.

For example, the processor 1111 of the access network device 11 may send DCI5 to the terminal 12 through the antenna 1115, and the DCI5 includes SA target time slot indication information and DATA target time slot indication information.

Correspondingly, the terminal 12 receives the DCI 5 sent by the access network device 11 and includes SA target slot indication information and DATA target slot indication information. The terminal 12 may determine the SA target time slot according to the SA target time slot indication information, and the terminal 12 determines the DATA target time slot according to the DATA target time slot indication information.

The SA target time slot indication information indicates the target time slot of one or more SAs. Here, the target time slot of the SA can be understood as determining a time slot for transmitting an SA. Optionally, when at least one symbol in a time slot is determined to be used for SA transmission, the time slot is a target time slot.

The DATA target time slot indication information indicates one or more target time slots of DATA. Here, the target time slot of DATA can be understood as a time slot for transmitting DATA. Optionally, when at least one symbol in a time slot is determined to be used for DATA transmission, the time slot is a target time slot.

The following describes how the access network device 11 determines the SA target time slot, the DATA target time slot, the SA target time slot indication information, and the DATA target time slot indication information.

Optionally, when determining the SA target time slot and the DATA target time slot, the access network device 11 may determine the combination of the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information sent to the terminal 12. SA target time slot and DATA target time slot.

Optionally, when determining the SA target time slot and the DATA target time slot, the access network device 11 may use the time slot corresponding to the reference subcarrier interval as a unit. Here, the reference subcarrier interval may be the same as the cell-level semi-static configuration, The user-level semi-static or dynamically configured reference subcarrier intervals are the same or different. It is determined below that the reference subcarrier interval of the SA target time slot and the DATA target slot is the same as the reference subcarrier interval of the cell-level semi-static configuration. ,Be explained. It should be noted that, when determining the SA target time slot and the DATA target time slot, the access network device 11 may use time slots corresponding to other reference subcarrier intervals as a unit, for example, a time slot corresponding to a subcarrier interval of 30kHz. This application No restrictions. The access network device 11 may carry the reference subcarrier interval for determining the SA target time slot and the DATA target time slot in a broadcast message; or, send it to the terminal through other RRC signaling; or, the access network device 11 may communicate with the terminal in advance It is determined that the reference subcarrier interval of the SA target time slot and the DATA target time slot is the same as the reference subcarrier interval of the cell-level semi-static configuration, or the access network device 11 may determine the SA target time slot and the DATA target time slot by default configuration with the terminal. The reference subcarrier interval is a specific value, such as 15 kHz, or in other manners, which is not limited in the embodiment of the present application.

With this implementation manner, the access network device can be prevented from delivering the SA target time slot and the DATA target time slot corresponding to each BWP subcarrier interval, which saves air interface resources, and reduces the load on the access network device and the design of the system 10 is complicated degree.

Optionally, the terminal 12 may be configured with multiple BWPs, and the access network device 11 may use the BWP subcarrier interval as a unit to determine the SA target time slot and the DATA target time slot corresponding to each BWP subcarrier interval respectively, and then determine them separately. And sending SA target slot indication information and DATA target slot indication information corresponding to each BWP subcarrier interval.

With this implementation manner, different time domain resources can be configured for different BWPs according to scheduling conditions of different BWPs, and time domain resources can be more flexibly used.

(1) Access network device 11 determines the SA target time slot

For example, the processor 1111 of the access network device 11 may determine the SA target time slot.

The access network device 11 may select an SA target time slot from the reserved time slots of the SA. For the reserved time slots of the SA, reference may be made to related content of S606, and details are not described herein again.

Optionally, since the access network device 11 in S606 combines the cell-level semi-static configuration information to determine the reserved time slot of the SA, the SA reserved time slot is subsequently accessed through user-level semi-static configuration or through dynamic configuration. The network device 11 may select the SA target time slot in combination with user-level semi-static configuration or dynamic configuration information.

Optionally, the access network device 11 may select the SA target time slot according to the scheduling situation. Here, the scheduling situation may include a scheduling situation of a time domain resource of a cellular service and a D2D service, a real-time load situation, and the like.

For example, if a third type of SA time domain resource is used, reference may be made to FIG. 5B, and time slot 4 is a reserved time slot of the SA. Time slot 4 has not been configured by user-level semi-static configuration information or user-level dynamic configuration information. The access network device 11 can determine that time slot 4 is the target time slot of the SA according to the scheduling situation, assuming time slot 4 is semi-static by the user level. The configuration information or user-level dynamic configuration information has been configured. The access network device 11 may determine whether time slot 4 meets the third type of SA time domain resource, such as whether time slot 4 is in combination with user-level semi-static configuration information or user-level dynamic configuration information. There are uplink symbols or flexible symbols, or whether the uplink symbols or flexible symbols of slot 4 are determined for SA transmission according to the scheduling situation.

(2) The access network device 11 determines the SA target slot indication information

For example, the processor 1111 of the access network device 11 may determine the SA target slot indication information.

The SA target slot indication information may indicate the SA target slot, for example, the SA target slot is indicated by indicating an index of the SA target slot.

For example, the SA target slot indication information may be a bitmap or bitmap indication information, and the bitmap may indicate whether the reserved time slot of the SA corresponding to the reference subcarrier interval indicated by the SA slot resource pool indication information in S606 is SA. Target time slot, for example, a bit in the bitmap indicates whether an SA reserved time slot is an SA target time slot. For example, the third D2D time domain resource type is used, and the access network device 11 in S606 is used to determine the SA. The first embodiment or the second embodiment of the time slot resource pool indication information. The time slot 4 is a reserved time slot for the SA. The access network device 11 determines that the time slot 4 is used to transmit the SA. The bitmap may be 1. , The first bit is 1, which means that slot 4 is the SA target slot. It is assumed that the SA slot resource pool indication information indicates the reserved time slot of the SA corresponding to the reference subcarrier interval of 2 or more. Here, the bitmap of the SA target slot indication information may include 2 or more bits. , Respectively, indicate whether 2 or more SA reserved time slots are SA target time slots.

(3) The access network device 11 determines the DATA target time slot

For example, the processor 1111 of the access network device 11 may determine a DATA target time slot.

Optionally, in the DATA target time slot, the access network device 11 may combine the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information sent to the terminal 12. One or more to determine the DATA target slot.

Optionally, before the access network device 11 determines a reserved time slot for transmitting DATA, the system 10 may configure a type of time domain resource for transmitting DATA. For example, the type of time domain resource for transmitting DATA may include the following: Several:

The first DATA time domain resource type: uplink symbols can be used for DATA communication. When all symbols in the time slot are uplink symbols, the time slot can be used for DATA communication; or, if the time slot is not all uplink symbols, then the uplink symbols in the time slot can be used for DATA communication; or,

The second DATA time domain resource type: flexible symbols can be used for DATA communication. When all symbols of the time slot are flexible symbols, then the time slot can be used for DATA communication; or, if the time slot is not all flexible symbols, then the flexible symbols in the time slot can be used for DATA communication; or,

The third DATA time domain resource type: uplink symbols and flexible symbols can be used for DATA communication. When all symbols in the timeslot are uplink symbols or flexible symbols, the timeslot can be used for DATA communication, or the timeslot includes uplink symbols and / or flexible symbols and downlink symbols, and the uplink symbols and / or in the timeslot Flexible symbols can be used for DATA communication. Here the uplink symbol and / or flexible symbol can be understood to include the following three cases: (1) uplink symbol; (2) flexible symbol; (3) uplink symbol and flexible symbol.

For ease of explanation, the embodiments of the present application are described by using the three types of DATA time domain resources. Those skilled in the art can understand that the type of DATA time domain resources may be other types. For example, the type of DATA time domain resources is uplink. Time slot, that is, only when all symbols in the time slot are uplink symbols, the time slot is used for DATA communication; or, the type of DATA time domain resource is flexible time slot, that is, only when all symbols in the time slot are When both are flexible symbols, this time slot is used for DATA transmission. The content of the embodiments of the present application is also applicable to other types of time domain resources for transmitting DATA, which is not limited.

With the first DATA time domain resource type, uplink data can be used for DATA transmission. The access network device 11 may determine that one or more configurations of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information correspond to the reference sub-domains. Carrier interval, which time slots meet at least one symbol as an uplink symbol, and then determine whether the uplink symbol is determined to be used for transmitting SA according to the scheduling situation. When the uplink symbol is determined to be used for transmitting SA, the time slot to which the uplink symbol belongs is the DATA target. Time slot.

For example, referring to FIG. 5B to FIG. 5E, the access network device 11 determines that the reference subcarrier interval corresponds to that at least one symbol of time slot 4 and time slot 5 is an uplink symbol, and time slot 4 is an SA target time slot. The network device 11 may determine the uplink symbol of time slot 5 for transmission of DATA according to the scheduling situation, and then time slot 5 is the DATA target time slot.

With the second DATA time domain resource type, flexible symbols can be used for DATA transmission. The access network device 11 may determine that one or more configurations of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information correspond to the reference sub-domains. Carrier interval, which time slots meet at least one symbol are flexible symbols, and then determine whether the flexible symbol is determined to be used for transmitting SA according to the scheduling situation. When the flexible symbol is determined to be used for transmitting SA, the time slot to which the flexible symbol belongs is the DATA target. Time slot.

For example, referring to FIG. 5B to FIG. 5E, when the access network device 11 determines that the reference subcarrier interval corresponds, when timeslot 2, timeslot 3, and timeslot 4 satisfy at least one symbol as a flexible symbol, and timeslot 4 is an SA target Slot, the access network device 11 may determine the flexible symbol of time slot 2 and the flexible symbol of time slot 3 for transmission of DATA according to the scheduling situation, then time slot 2 and time slot 3 are DATA target time slots.

With the third DATA time domain resource type, flexible symbols and uplink symbols can be used for DATA transmission. The access network device 11 may determine that one or more configurations of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information correspond to the reference sub-domains. Carrier interval, which slots satisfy at least one symbol as a flexible symbol or an uplink symbol, and then determine whether the flexible symbol or uplink symbol is determined to be used for transmitting DATA according to the scheduling situation. When the flexible symbol or uplink symbol is determined to be used for transmitting DATA, the The time slot to which the flexible symbol or uplink symbol belongs is the DATA target time slot.

For example, referring to FIG. 5B to FIG. 5E, time slot 2, time slot 3, time slot 4, and time slot 5 satisfy at least one symbol as a flexible symbol or an uplink symbol, time slot 4 is an SA target time slot, and access network device 11 The flexible symbols or uplink symbols of timeslot 2, timeslot 3, and timeslot 5 can be determined according to the scheduling situation for transmission of DATA. Then timeslot 2, timeslot 3, and timeslot 5 are DATA target timeslots.

Optionally, before S611, the access network device 11 may first determine the DATA reserved time slot, and the access network device 11 may determine the DATA reserved time slot by referring to the relevant content of the access network device 11 determining the SA reserved time slot. The access network device 11 may then select a DATA target time slot from the DATA reserved time slots according to the scheduling situation.

For example, with the third DATA time domain resource type, the access network device 11 can determine time slot 2, time slot 3 and time slot 5 reserve time slots for DATA, and the access network device 11 can determine time slot 2 according to the scheduling situation. Time slot 3 and time slot 5 are DATA target time slots.

(4) The access network device 11 determines the DATA target time slot indication information

For example, the processor 1111 of the access network device 11 may determine DATA target slot indication information.

The DATA target slot indication information may indicate a DATA target slot, for example, the DATA target slot is indicated by indicating an index of the DATA target slot. For example, the DATA target slot indication information may be bitmap or bitmap indication information.

As a first implementation manner, the bitmap may indicate time domain resources of one or more configurations of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information. , Whether the time slot corresponding to the reference subcarrier interval is the target time slot of DATA, for example, a bit in the bitmap indicates whether the time slot corresponding to the DATA time domain resource type corresponding to the reference subcarrier interval is the target time slot of DATA For example, the third type of DATA time domain resource is used. Time slot 2, time slot 3, time slot 4, and time slot 5 are time slots that conform to the type of DATA time domain resource. The access network device 11 determines time slot 2 and time. Slot 3 and time slot 5 are the target time slots of DATA. The bitmap can be 1101. The first bit is 1 to represent time slot 2 as the DATA target time slot. The second bit is 1 to represent time slot 3 as the DATA target time slot. ; The third bit is 0, which indicates that slot 4 is not a DATA target slot; the fourth bit is 1, which indicates that slot 5 is a DATA target slot.

As a second implementation manner, optionally, before S409, the access network device 11 may broadcast the DATA time slot resource pool indication information, and the DATA time slot resource pool indication information indicates that the DATA reserved time slot can be accessed by referring to S401. The network device 11 broadcasts the related content of the SA slot resource pool indication information. The bitmap can indicate whether the DATA reserved time slot corresponding to the reference subcarrier interval is a DATA target time slot. For example, using a third DATA time domain resource type, the access network device 11 can broadcast time slots 2, time slots 3, and Time slot 5 is a reserved time slot for DATA. The bitmap can be 111, and the first bit is 1, which indicates that time slot 2 is the target time slot for DATA. The second bit is 1, which indicates that time slot 3 is the target time slot for DATA. ; The third bit is 1, which means that time slot 5 is the target time slot of DATA.

The above describes the determination of the SA target time slot, the DATA target time slot, the SA target time slot indication information, and the DATA target time slot indication information corresponding to the reference subcarrier interval, and the SA target time slot indication information and the DATA target time slot indication information are determined. Send to terminal 12. When the terminal 12 is configured with multiple BWPs, the SA target time slot indication information and DATA target time slot indication information of each BWP can be determined through the correspondence between each BWP subcarrier interval and the reference subcarrier interval. The network device 11 is configured in units of BWP, which can save system complexity and save wireless communication resources between the access network device 11 and the terminal 12.

S612: The terminal 12 determines available symbols of the SA target slot.

The terminal 12 may determine the available symbols of the SA target time slot according to one or more of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information. An embodiment is illustrated below.

First, the terminal 12 may obtain one or more SA target time slots corresponding to the BWP1 subcarrier interval according to the relationship between the received SA target slot indication information and the subcarrier interval of the BWP1 and the reference subcarrier interval.

For example, using a third type of SA time domain resource, the SA target slot indication information indicates that the SA target slot corresponding to the reference subcarrier interval is slot 4, the reference subcarrier interval is 15kHz, and the BWP1 subcarrier interval is 30kHz, then BWP1 The SA target time slots corresponding to the subcarrier interval are time slot 7 and time slot 8.

Secondly, for each SA target slot corresponding to the BWP1 subcarrier interval, the terminal 12 may combine one of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information, or A variety of available symbols that determine the SA target slot corresponding to the BWP1 subcarrier interval.

If the first SA time domain resource type is used, the available symbols of the SA target time slot include the uplink symbols in the SA target time slot.

If the second SA time domain resource type is used, the available symbols of the SA target time slot include flexible symbols in the SA target time slot.

If a third type of SA time domain resource is used, the available symbols of the SA target slot include the uplink symbol and the flexible symbol in the SA target slot.

The following uses an SA target time slot as an example to determine the available symbols of the SA target time slot.

As a first embodiment, FIG. 7A is a schematic diagram of a method for determining available symbols of an SA target time slot. As shown in FIG. 7A, the terminal 12 may first determine whether the SA target time slot is configured by the first user-level dynamic configuration information. However, if configured through the first user-level dynamic configuration information, the terminal 12 determines the available symbols of the SA target time slot in combination with the first user-level dynamic configuration information; if it has not been configured through the first user-level dynamic configuration information, the terminal 12 determines Whether the SA target time slot is configured through the first user-level semi-static configuration information. If the SA target time slot is configured through the first user-level semi-static configuration information, the terminal 12 determines the availability of the SA target time slot by combining the first user-level semi-static configuration information. Symbol; if it has not been configured through the first user-level semi-static configuration, the terminal 12 determines the available symbol of the SA target time slot by combining the information on the first cell-level semi-static configuration.

For example, using the third type of SA time domain resource, the SA target time slot corresponding to the reference subcarrier interval is time slot 4, and the SA target time slot corresponding to the BWP1 subcarrier interval is time slot 7 and time slot 8. Whether slot 7 is configured by using the first dynamic configuration information. Since slot 7 is not configured by using the first dynamic configuration information, terminal 12 determines whether slot 7 is configured by using the first user-level semi-static configuration information. It is configured through the first user-level semi-static configuration information, and the terminal 12 determines the available symbols of time slot 7 in combination with the first cell-level semi-static configuration information. Similarly, time slot 8 has not been configured by the first dynamic configuration information and has not been configured by the first user-level semi-static configuration information, then the terminal 12 determines the available symbols of time slot 8 in combination with the first cell-level semi-static configuration information. For example, according to the first cell-level semi-static configuration information, all symbols of slot 7 are flexible symbols, the first 6 symbols of slot 8 are flexible symbols, and the last 8 symbols of slot 8 are uplink symbols. If a third D2D time domain resource type is used, the available symbols of time slot 7 include all symbols of time slot 7 and the available symbols of time slot 8 include all symbols of time slot 8.

As a second embodiment, FIG. 7B is a schematic diagram of another method for determining available symbols of an SA target slot. As shown in FIG. 7B, the terminal 12 may determine the time domain resource configuration information of the latest SA target time slot configuration, and combine the latest time domain resource configuration information to determine the available symbols of the SA target time slot. For example, if the time domain resource configuration information of the last SA target slot configuration is the first cell-level semi-static configuration, the available symbols of the SA target slot are determined by combining the first cell-level semi-static configuration information; if the SA target is last configured The time domain resource configuration information of the time slot is the first user-level semi-static configuration, and the available symbols of the SA target time slot are determined in combination with the first user-level semi-static configuration information; if the time domain resource configuration information of the SA target time slot is last configured For the first user-level dynamic configuration information, the available symbols of the SA target time slot are determined in combination with the first user-level dynamic configuration information.

For example, using the third type of SA time domain resource, the SA target time slot corresponding to the reference subcarrier interval is time slot 4, and the SA target time slot corresponding to the BWP1 subcarrier interval is time slot 7 and time slot 8. The time domain resource configuration information of slots 7 and 8 is the first cell-level semi-static configuration information. The terminal 12 determines the available symbols of time slot 7 and the available symbols of time slot 8 in combination with the first cell-level semi-static configuration information. For example, according to the first cell-level semi-static configuration information, all symbols of slot 7 are flexible symbols, the first 6 symbols of slot 8 are flexible symbols, and the last 8 symbols of slot 8 are uplink symbols. If a third D2D time domain resource type is used, the available symbols of time slot 7 include all symbols of time slot 7 and the available symbols of time slot 8 include all symbols of time slot 8.

As a third embodiment, FIG. 7C is a schematic diagram of another method for determining available symbols of an SA target time slot. As shown in FIG. 7C, first, it is determined whether the SA target time slot configured by the first cell-level semi-static configuration information is Flexible symbols exist. If there is no flexible symbol, determine the uplink symbol and downlink symbol of the SA target slot according to the first cell-level semi-static configuration information. If there is a flexible symbol, for each flexible symbol, determine the first user-level semi-static configuration. Information or the first user-level dynamic configuration information whether the flexible symbol is configured. If the first user-level semi-static configuration information or the first user-level dynamic configuration information configures the flexible symbol, combined with the first user-level semi-static configuration The configuration information or the first user-level dynamic configuration information determines that the flexible symbol is an uplink symbol or a downlink symbol; if the first user-level semi-static configuration information or the first user-level dynamic configuration information does not configure the flexible symbol, the flexible symbol is determined. The symbol is a flexible symbol; eventually the terminal 12 determines the available symbols for the SA target slot.

For example, using a third type of SA time domain resource, the target SA slot corresponding to the reference subcarrier interval is slot 4, and the target SA slot corresponding to the BWP1 subcarrier interval is slot 7 and slot 8. For time slot 7, there are flexible symbols in time slot 7 configured by the first cell-level semi-static configuration information. For each flexible symbol in time slot 7, the first user-level semi-static configuration information or the first user-level dynamic configuration information are both The flexible symbol is not configured, so it is determined that the flexible symbol in slot 7 is a flexible symbol. In combination with the first cell-level semi-static configuration information, it is determined that there is no uplink symbol or downlink symbol in slot 7, so all the symbols in slot 7 are Flexible symbols; for slot 8, there are flexible symbols in slot 8 configured by the first cell-level semi-static configuration information, and for each flexible symbol in slot 8, the first user-level semi-static configuration information or the first user-level dynamic None of the configuration information configures this flexible symbol, so the flexible symbol in slot 8 is determined to be a flexible symbol, and the first 8 cell-level semi-static configuration information is used to determine that the last 8 symbols of slot 8 are uplink symbols, so slot 8 The first 6 symbols are flexible symbols, and the last 8 symbols are uplink symbols. If a third D2D time domain resource type is used, the available symbols of time slot 7 include all symbols of time slot 7 and the available symbols of time slot 8 include all symbols of time slot 8.

As a fourth embodiment, FIG. 7D is a schematic diagram of another method for determining available symbols of an SA target time slot. As shown in FIG. 7D, first, it is determined whether the SA target time slot configured by the first cell-level semi-static configuration information is Flexible time domain resources exist. If the first cell semi-static configuration is not configured with flexible time domain resources, the available symbols of the SA target time slot are determined in combination with the first cell semi-static configuration result; if the first cell-level semi-static configuration information is configured with flexibility Time domain resources, to determine at least one flexible symbol of the flexible time domain resource configured for the first cell-level semi-static configuration, whether the user-level semi-static configuration is a flexible symbol, and if not (indicating that the user-level semi-static configuration will be a cell-level semi-static configuration The resulting flexible time domain resource configuration is uplink time domain resources, or downlink time domain resources, or part of the uplink time domain resources, and part of the downlink time domain resources), combined with the first cell-level semi-static configuration information and the first user-level semi-static The static configuration information determines the available symbols of the SA target slot. If yes (indicating that the first user-level semi-static configuration will configure the first cell-level semi-static configuration The at least one flexible symbol of the flexible time domain resource is still configured as a flexible symbol), it is judged that for the at least one symbol of the spiritual time domain resource configured semi-statically at the first user level, the first dynamic configuration information is configured as an uplink symbol or a downlink symbol If not (explain that the flexible time domain resources configured by the first dynamic configuration information to the first user-level configuration information are still configured as flexible time domain resources), and if so (explain that the first dynamic configuration information configures the first user-level configuration information (At least one flexible symbol in the flexible time domain resource is configured as an uplink symbol or a downlink symbol), and when the SA target is determined by combining the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information Available symbols.

S613: The terminal 12 determines available symbols of the DATA target slot.

For example, the processor 1211 of the terminal 12 may determine the available symbols for the DATA target slot.

The terminal 12 may determine the available symbols of the DATA target time slot according to one or more of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information. An embodiment is illustrated below.

First, the terminal 12 acquires one or more DATA target time slots corresponding to the BWP subcarrier interval according to the relationship between the received DATA target slot indication information and the subcarrier interval and reference subcarrier interval of BWP1.

For example, using a third type of DATA time domain resource, the DATA target slot indication information indicates that the DATA target slots corresponding to the reference subcarrier interval are timeslot 2, slot 3, and slot 5, and the reference subcarrier interval is 15kHz. BWP1 The subcarrier interval is 30kHz, then the DATA target time slots corresponding to the BWP1 subcarrier interval are time slot 3, time slot 4, time slot 5, time slot 6, time slot 9, and time slot 10.

Secondly, for each DATA target slot corresponding to the BWP1 subcarrier interval, the terminal 12 may combine one of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information or A variety of available symbols that determine the DATA target slot corresponding to the BWP1 subcarrier interval.

If the first DATA time domain resource type is used, the available symbols of the DATA target time slot include the uplink symbol in each DATA target time slot.

If the second DATA time domain resource type is used, the available symbols of the DATA target time slot include flexible symbols in each DATA target time slot.

If the third DATA time domain resource type is used, the available symbols of the DATA target time slot include the uplink symbol and the flexible symbol in each DATA target time slot.

The following uses a DATA target time slot as an example to determine the available symbols of the DATA target time slot.

As a first implementation manner, it can be determined whether the DATA target timeslots are respectively configured with the first user-level dynamic configuration information. If configured with the first user-level dynamic configuration information, the terminal 12 determines the data combination with the first user-level dynamic configuration information. Available symbols for the DATA target time slot; if not configured with the first user-level dynamic configuration information, the terminal 12 determines whether the DATA target time slot is configured with the first user-level semi-static configuration information, and if it is configured with the first user-level semi-static configuration After the information is configured, the terminal 12 determines the available symbols of the DATA target time slot by combining the information of the first user-level semi-static configuration; if it has not passed the first user-level semi-static configuration, the terminal 12 combines the information of the first cell-level semi-static configuration For determining the available symbols of the DATA target time slot, refer to related content in FIG. 7A. The difference is that the available symbols of the DATA target time slot are determined here, and FIG. 7A determines the available symbols of the SA target time slot.

For example, using the third type of DATA time domain resource, the DATA target time slots corresponding to the BWP1 subcarrier interval are time slot 3, time slot 4, time slot 5, time slot 6, time slot 9, and time slot 10. Time slot 3, time slot 4, time slot 5 and time slot 6 are configured using the first user-level dynamic configuration information. The first 6 symbols of time slot 3 are downlink symbols, and the last 8 symbols of time slot 3 are flexible symbols. The first 10 symbols of time slot 4 are flexible symbols, the last 4 symbols of time slot 4 are uplink symbols, the first 12 symbols of time slot 5 are downlink symbols, and the last 2 symbols of time slot 5 are flexible symbols; time slots The first 2 symbols of 6 are flexible symbols, and the last 12 symbols are uplink symbols. Slots 9 and 10 have not been configured with the first user-level dynamic configuration information and the first user-level semi-static information. According to the first cell-level semi-static configuration information, all symbols of slot 9 are uplink symbols, and slot 10 All the symbols are ascending symbols. The third type of D2D time domain resource is used. The available symbols of slot 3 include the last 8 symbols of slot 3. The available symbols of slot 4 include all the symbols of slot 4. The available symbols of slot 5 include slot 5. The last 2 symbols, available symbols of time slot 6 include all symbols of time slot 6, available symbols of time slot 9 include all symbols of time slot 9 and available symbols of time slot 10 include all symbols of time slot 10.

As a second implementation manner, the time domain resource configuration information of the DATA target time slot can be determined most recently. The relevant content in FIG. 7B can be referred to, the difference is that the available symbols of the DATA target slot are determined here, and FIG. 7B is the available symbols of the SA target slot.

As a third implementation manner, it can be determined whether the first cell-level semi-static configuration information is configured with flexible time domain resources, and then combined with the first user-level semi-static configuration information or the first user-level dynamic configuration information to determine the flexible time domain resources. The symbol is an upward symbol, a flexible symbol, or a downward symbol. Reference may be made to related content in FIG. 7C, the difference being that here is the available symbol for determining the DATA target slot, and FIG. 7C is the available symbol for determining the SA target slot.

S614: The terminal 13 determines an available symbol of the SA target slot.

S614 can occur after S606, and the order of each step in S607-S613 is not limited. For example, S614 can precede S608.

The terminal 13 receives the SA slot resource pool indication information in S606. The SA slot resource pool indication information may indicate one or more SA reserved time slots. When the reserved time slots of the one or more SAs include the SA target, Gap.

Optionally, the terminal 13 does not know which time slots among the one or more SA reserved time slots are SA target time slots. The terminal 13 may confirm each SA reserved time slot as an SA target time slot, and separately determine available symbols of each SA target time slot.

The terminal 12 may determine the available symbols of the SA target time slot according to one or more of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information. For related content, refer to the available symbols that the terminal 12 determines for the SA target slot in S612.

S615: The terminal 12 sends an SA to the terminal 13 on the available symbols of the SA target slot.

For example, the processor 1211 of the terminal 12 may send the SA to the terminal 13 through the antenna 1216 on the available symbol of the SA target slot.

The SA includes indication information of a DATA target slot. The terminal 12 may encapsulate the indication information of the DATA target time slot received from the access network device 11 in S611 in the SA.

For example, if the third type of SA time domain resource is used, the SA target time slots corresponding to the BWP1 subcarrier interval are time slots 7 and 8. The available symbols of time slot 7 include all symbols of time slot 7. The available symbols include all symbols of time slot 8, and terminal 12 sends SA on all symbols of time slot 7 and all symbols of time slot 8.

Optionally, the SA may further include available symbol indication information of the DATA target slot, and the available symbol indication information of the DATA target slot may be used to indicate available symbols of the DATA target slot.

For example, the DATA target slot indication information indicates that the DATA target slots corresponding to the reference subcarrier interval are slot 2, slot 3, and slot 5. The available symbol indication information of the DATA target slot indicates that the available symbols of the DATA target slot corresponding to the reference subcarrier interval are the last 11 symbols of slot 2, the last 8 symbols of slot 3, and all symbols of slot 5.

Accordingly, the terminal 13 receives the SA from the terminal 12 on the available symbols of the SA target slot, and the terminal 13 can obtain the DATA target slot indication information in the SA.

Optionally, the terminal 13 may detect the SA on the available symbols of the SA target slot after synchronizing with the terminal 12 through S607.

Optionally, the terminal 13 may determine one or more reserved time slots indicated by the indication information of the SA time slot resource pool as the SA target time slot, determine the available symbols of the target time slot, and then place the available symbols on the SA target time slot. Detection of SA.

After the terminal 12 sends an SA on the available symbol of the SA target slot, the terminal 13 receives the SA correspondingly on the available symbol of the SA target slot, and the terminal 13 can obtain the indication information of the DATA target slot.

Optionally, when the SA also carries the available symbol indication information of the DATA target slot, the terminal 13 may also obtain the available symbol indication information of the DATA target slot.

As an alternative implementation of the terminal 13 side of S614-S615:

After the terminal 13 receives the SA slot resource pool instruction information through S606, the terminal 13 can obtain the SA reserved slot according to the slot resource pool instruction information, and detect the SA on all symbols of the SA reserved slot. For example, the terminal 13 may determine the SA reserved slot corresponding to the BWP subcarrier interval according to the relationship between the reference subcarrier interval and the BWP subcarrier interval, and the SA reserved slot corresponding to the BWP subcarrier interval may be one or more. , And then detect SA on all symbols of the SA reserved slot corresponding to the BWP subcarrier interval.

For example, the terminal 13 knows that the SA reserved time slot corresponding to the reference subcarrier interval is time slot 4, and can know that the SA reserved time slot corresponding to the BWP1 subcarrier interval is time slot 7 and At time slot 8, terminals 12 and 13 detect SA on all symbols of time slot 7 and all symbols of time slot 8.

With this first implementation manner, the terminal 13 can directly detect SA on all symbols of the SA reserved time slot, without the need to distinguish which symbols of the SA reserved time slot to detect the SA, reducing the design complexity of the terminal 13. And burden.

S616: The terminal 13 determines the available symbols of the DATA target slot.

After receiving the DATA target time slot indication information through S615, the terminal 13 can determine the DATA target time slot according to the DATA target time slot indication information.

The terminal 13 may determine the available symbols of the DATA target time slot according to one or more of the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information. For related content, reference may be made to related content in which the terminal 12 determines the available symbols of the DATA target slot.

Optionally, when the SA also carries the available symbol indication information of the DATA target time slot, the terminal 13 may also obtain the available symbol indication information of the DATA target time slot, and the terminal 13 may directly obtain Know the available symbols for the DATA target slot.

For example, the DATA target slot indication information indicates that the DATA target slots corresponding to the reference subcarrier interval are slot 2, slot 3, and slot 5. The available symbol indication information of the DATA target slot indicates that the available symbols of the DATA target slot corresponding to the reference subcarrier interval are the last 11 symbols of slot 2, the last 8 symbols of slot 3, and all symbols of slot 5. The terminal 13 can determine the last 8 symbols of time slot 3, all the symbols of time slot 4, the last 2 symbols of time slot 5, and the time slot according to the relationship between the reference subcarrier interval and the BWP subcarrier interval. All symbols of 6, all symbols of slot 9, and all symbols of slot 10,

This embodiment can prevent the terminal 13 from determining the available symbols of the DATA target time slot according to the time domain resource configuration information of the terminal 13, simplifying the operation of the terminal 13, and the terminal 12 can decide which ones according to its real-time uplink and downlink scheduling situation. The symbol is an available symbol of the DATA target slot, and directly indicates the terminal 13 to improve flexibility.

S617: The terminal 12 sends DATA to the terminal 13 on the available symbols of the DATA target slot.

For example, the processor 1211 of the terminal 12 may send DATA to the terminal 13 through the antenna 1216 on the available symbols of the DATA target time slot.

For example, if the third type of DATA time domain resource is used, the available symbols of the DATA target slot include the last 8 symbols of slot 3, all the symbols of slot 4, the last 2 symbols of slot 5, and the symbols of slot 6. All symbols, all symbols of time slot 9 and all symbols of time slot 10, terminal 12 in the last 8 symbols of time slot 3, all symbols of time slot 4, all 2 symbols of time slot 5, all of time slot 6 DATA is transmitted on all symbols, all symbols in slot 9 and all symbols in slot 10.

Accordingly, the terminal 13 receives DATA from the terminal 12 on the available symbols of the DATA target slot.

For example, terminal 13 in the BWP1 subcarrier interval corresponds to the last 8 symbols of slot 3, all symbols of slot 4, the last 2 symbols of slot 5, all symbols of slot 6, all symbols of slot 9, All symbols in slot 10 receive DATA.

As an alternative implementation of the 13 side of the S616-S617 terminal:

As a first implementation manner, the terminal 13 acquires the DATA target time slot according to the DATA target time slot indication information, and detects DATA on the DATA target time slot. For example, the terminal 13 determines the DATA target slot corresponding to the BWP subcarrier interval according to the relationship between the reference subcarrier interval and the BWP subcarrier interval. The DATA target slot corresponding to the BWP subcarrier interval may be one or more, and then DATA is detected on the DATA target slot corresponding to the BWP subcarrier interval.

For example, the DATA target timeslot indication information indicates that the DATA target timeslots corresponding to the reference subcarrier interval are timeslot 2, timeslot 3, and timeslot 5, the reference subcarrier interval is 15kHz, and the BWP1 subcarrier interval is 30kHz, then the BWP1 subcarrier The target data slot corresponding to the interval is slot 3, slot 4, slot 5, slot 6, slot 9, and slot 10. Terminal 13 is in slot 3, slot 4, slot 5, and slot 6. DATA is detected on time slots 9 and 10.

The following describes several implementation modes of Mode 2.

Mode 2 may specifically include an out-of-coverage (OOC) mode and an edge-of-coverage (EOC) mode. When the terminal 12 is located outside the coverage of the access network device 11, the terminal 12 can use the OOC mode for D2D communication. When the terminal 12 is located in the coverage area of the access network device 11 or at the edge of the coverage area of the access network device 11, the terminal 12 can use the EOC mode. For example, the terminal 12 and the access network device 11 are in an RRC idle state, and the terminal 12 can use The EOC mode is used for D2D communication; or, the terminal 12 and the access network device 11 are in an RRC connection state, and the access network device 11 may decide that the terminal 12 uses the EOC mode for D2D communication.

FIG. 8 is a schematic diagram of another method for performing D2D communication using time domain resources in an NR system, and an EOC mode of mode 2 may be adopted. As shown in Figure 8:

S801: The access network device 11 broadcasts the first cell-level semi-static configuration information.

S802: The access network device 11 sends the first user-level semi-static configuration information to the terminal 12.

S803: The access network device 11 sends the first user-level semi-static configuration information to the terminal 13.

S804: The access network device 11 sends the first user-level dynamic configuration information to the terminal 12.

S805: The access network device 11 sends the first user-level dynamic configuration information to the terminal 13.

The contents in S801-S805 can refer to the contents in S601-S605, and will not be repeated here.

S806: The access network device 11 broadcasts SA slot resource pool indication information.

At this time, the terminal 12 and the terminal 13 are located at the edge or within the coverage area of the access network device 11, and the terminal 12 and the terminal 13 can still receive the broadcast message.

Accordingly, the terminal 12 and the terminal 13 receive SA slot resource pool indication information.

S806 may refer to the content in S606, which is not repeated here.

S807: The access network device 11 broadcasts DATA time slot resource pool indication information.

For example, the processor 1111 of the access network device 11 may broadcast the DATA time slot resource pool indication information through the antenna 1115.

Accordingly, the terminal 12 and the terminal 13 may receive the DATA slot resource pool indication information.

The DATA time slot resource pool indication information indicates one or more DATA reserved time slots, and the one or more DATA reserved time slots may include a DATA target time slot.

The reserved time slot of DATA can be understood as a time slot reserved for transmitting DATA, and the transmission can be understood as sending or receiving. For example, terminal 12 is a D2D transmitting end. For terminal 12, the reserved time slot of DATA can be understood as The time slot reserved for transmitting the SA; the terminal 13 is a D2D receiving end. For the terminal 13, the time slot reserved for DATA can be understood as the time slot reserved for receiving DATA. Optionally, when at least one symbol in a time slot is reserved for transmitting DATA, it can be understood that the time slot is reserved for transmitting DATA, and the time slot is reserved for DATA.

The principle and method of how the access network device 11 determines the DATA reserved time slot and how to determine the DATA time slot resource pool instruction information are similar to how to determine the SA reserved time slot and how to determine the SA time slot resource pool instruction information. The difference lies in the former. Used to transmit DATA, the latter is used to transmit SA, you can refer to the relevant content in S606.

For example, if the third DATA time domain resource type is used, the access network is the device 11 to determine that it corresponds to the reference subcarrier interval, and time slot 2, time slot 3, time slot 4, and time slot 5 satisfy at least one symbol as an uplink symbol or Flexible symbols. The access network device 11 determines the uplink symbols and / or flexible symbols of slot 2 (that is, the last 11 symbols of slot 2) and the uplink symbols and / or flexible symbols of slot 3 (that is, all of slot 3 according to the scheduling situation). Symbols) and uplink symbols and / or flexible symbols (that is, all symbols of time slot 5) of time slot 5 are reserved for DATA transmission, then time slots 2, time slot 3, and time slot 5 are reserved for data transmission. Gap.

For example, the DATA time slot resource pool indication information may be a bitmap or a bitmap indication information. The bitmap may indicate whether the time slot corresponding to the DATA communication resource type corresponding to the reference subcarrier interval is a reserved time slot for DATA. For example, if The third type of D2D time domain resource is used. The time slots that conform to the D2D communication resource type are time slot 2, time slot 3, time slot 4, and time slot 5. The bitmap can be 1101, and the first bit is 1, which indicates the time. Slot 2 is a reserved time slot for DATA; the second bit is 1, which indicates that time slot 3 is a reserved time slot for DATA; the fourth bit is 1, which indicates that time slot 5 is a reserved time slot for DATA; the third bit is 0, indicating that time slot 4 is not a DATA reserved time slot.

S808: The terminal 12 and the terminal 13 establish synchronization.

S809: The terminal 12 selects an SA target slot from the SA slot resource pool.

For example, the processor 1211 of the terminal 12 may select an SA target time slot from the SA time slot resource pool.

In mode 1, the access network device 11 sends the SA target time slot and the DATA target time slot to the terminal 12 through DCI5. In EOC, the terminal 12 autonomously selects the SA target time slot from the SA time slot resource pool, and the terminal 12 autonomously Select the DATA target slot from the DATA slot resource pool.

Terminal 12 selects the SA target time slot from the SA time slot resource pool. For details, refer to the content of selecting the SA target time slot from the SA time slot resource pool by the access network device 11 in S611. The difference is that the former is selected by terminal 12 and the latter. Selection by access network device 11; the former can use the time slot corresponding to the BWP subcarrier interval as the unit when selecting the SA target slot, and the latter can use the reference subcarrier interval when selecting the SA target slot The time slot is a unit.

For example, using the third SA time domain resource type, the slot 4 corresponding to the reference subcarrier interval is a reserved time slot for the SA. According to the relationship between the reference subcarrier interval and the BWP subcarrier interval, we can know the time slot corresponding to the BWP subcarrier interval. Time slots 7 and 8 are reserved for SA. Terminal 12 can determine time slots 7 and 8 as the target time slots for SA based on the time domain resource configuration information of time slots 7 and 8 and the scheduling situation of terminal 12.

S810: The terminal 12 selects a DATA target slot from a DATA slot resource pool.

For example, the processor 1211 of the terminal 12 may select a DATA target slot from a DATA slot resource pool.

The terminal 12 selects the DATA target time slot from the DATA time slot resource pool, which is similar to the principle and method of selecting the SA target time slot from the SA time slot resource pool by the access network device 11 in S611. The difference is that the former is selected by the terminal 12 and the latter The former is selected by the access network device 11; the former selects the DATA target time slot and the latter selects the SA target time slot; when the former selects the SA target time slot, the time slot corresponding to the BWP subcarrier interval can be used as a unit When the latter selects the DATA target time slot, the time slot corresponding to the reference subcarrier interval can be used as a unit, and the relevant content in S406 can be referred to.

For example, using the third DATA time domain resource type, the time slots 2, 3, and 5 corresponding to the reference subcarrier interval are reserved for the DATA. The terminal 13 may refer to the reference subcarrier interval and the reference subcarrier interval according to the BWP. The time slot 3, time slot 4, time slot 5, time slot 6, time slot 9, and time slot 10 corresponding to the BWP subcarrier interval are determined as reserved time slots. The terminal 13 determines the time slot 3, the time slot 4, the time slot 4 according to the time domain resource configuration information of the time slot 3, the time slot 4, the time slot 5, the time slot 6, the time slot 9, and the time slot 10 and the scheduling situation of the terminal 12. Slot 5, slot 6, slot 9 and slot 10 are SA target slots.

S811: The terminal 12 determines available symbols of the SA target slot.

S812: The terminal 12 determines available symbols of the DATA target slot.

S813: The terminal 13 determines an available symbol of the SA target slot.

S814: The terminal 12 sends an SA on the available symbols of the SA target slot.

S815: The terminal 13 determines available symbols of the DATA target slot.

S816: The terminal 12 sends DATA on the available symbols of the DATA target slot.

Among them, S811-S816 can refer to the contents of S612-S617 in FIG. 6, which will not be repeated here. .

FIG. 9 is a schematic diagram of another method for performing D2D communication using time domain resources in an NR system, which can adopt an OOC mode of mode 2. When the terminal 12 and the terminal 13 are located outside the coverage of the access network device 11, the terminal 12 and the terminal 13 can use the OOC mode for D2D communication. As shown in Figure 9:

It should be noted that the terminal 12 and the terminal 13 may be located outside the coverage area of the access network device 11, for example, the terminal 12 and the terminal 13 may be moved from the coverage area of the access network device 11 to the coverage area of the access network device 11. 12 and terminal 13 may receive the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information, and then terminals 12 and 13 may receive the first cell-level semi-static configuration information. 1. The first user-level semi-static configuration information and the first user-level dynamic configuration information are stored. For details, reference may be made to the contents in S601-S605, and details are not described herein again. Alternatively, the terminal 12 and the terminal 13 may be located outside the coverage of the access network device 11 but may be located within the coverage of other access network devices. At this time, the terminal 12 and the terminal 13 may accept cell-level semi-static transmission from other access network devices. For configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, reference may be made to the content in the embodiments of the present application, and details are not described herein again.

S901: Terminal 12 and terminal 13 pre-configure SA slot resource pool indication information.

The terminal 12 and the terminal 13 are located outside the coverage of the access network device 11, and the terminal 12 and the terminal 13 cannot receive broadcast messages of the access network device 11.

Optionally, the terminal 12 and terminal 13 pre-configure the SA slot resource pool indication information, which may include the terminal 12 and the terminal 13 receiving the SA slot resources broadcast by the access network device 11 when they were in the coverage area of the access network device 11 recently. The pool instruction information, the terminal 12 and the terminal 13 save the SA slot resource pool instruction information. For example, the processor 1211 of the terminal 12 may receive the SA slot resource pool indication information from the access network device 11 through the antenna 1216, and the memory 1213 of the terminal 12 stores the SA slot resource pool indication information; the processor 1211 of the terminal 13 may The SA slot resource pool indication information is received from the access network device 11 through the antenna 1216, and the memory 1213 of the terminal 13 stores the SA slot resource pool indication information.

Optionally, the terminal 12 and terminal 13 pre-configured the SA slot resource pool indication information may include statically writing the SA slot resource pool indication information into the terminal 12 and the terminal 13 in advance, for example, statically writing the SA slot The resource pool instruction information is written into the processor 1211 or the memory 1213 of the terminal 12, and the SA slot resource pool instruction information is written into the processor 1211 or the memory 1213 of the terminal 13 in a static manner.

For the content of the SA slot resource pool indication, refer to the related content of S606, which is not repeated here.

S906: The terminal 12 and the terminal 13 pre-configure the DATA slot resource pool indication information.

Optionally, the terminal 12 and terminal 13 pre-configure the DATA time slot resource pool indication information, which may include the terminal 12 and the terminal 13 receiving the DATA time slot resources broadcast by the access network device 11 when they were in the coverage area of the access network device 11 recently. The pool instruction information is stored in the terminal 12 and the terminal 13 in the DATA slot resource pool. For example, the processor 1211 of the terminal 12 may receive the DATA time slot resource pool indication information from the access network device 11 through the antenna 1216, and the memory 1213 of the terminal 12 stores the DATA time slot resource pool indication information; the processor 1211 of the terminal 13 may The DATA time slot resource pool indication information is received from the access network device 11 through the antenna 1216, and the memory 1213 of the terminal 13 stores the DATA time slot resource pool indication information.

Optionally, the terminal 12 and terminal 13 pre-configure the DATA time slot resource pool indication information, which may include statically writing the DATA time slot resource pool indication information to the terminal 12 and the terminal 13 in advance, for example, statically writing the DATA time slot The resource pool instruction information is written into the processor 1211 or the memory 1213 of the terminal 12, and the DATA time slot resource pool instruction information is written into the processor 1211 or the memory 1213 of the terminal 13 in a static manner.

For the content of the DATA time slot resource pool indication, refer to the related content of S807, which is not repeated here.

S903: The terminal 12 and the terminal 13 establish synchronization.

S904: The terminal 12 selects an SA target slot from the SA slot resource pool.

S905: The terminal 12 selects a DATA target slot from a DATA slot resource pool.

S906: Determine the available symbols of the SA target slot.

S907: Determine the available symbols of the DATA target slot.

S908: The terminal 13 determines an available symbol of the SA target slot.

S909: The terminal 12 sends an SA on the available symbols of the SA target slot.

S910: The terminal 13 determines an available symbol of a DATA target slot.

S911: The terminal 12 sends DATA on the available symbols of the DATA target slot.

For S904-S911, reference may be made to the contents in S809-S816 in FIG. 8, and details are not described herein again.

The method in the embodiment of the present application has been described above with reference to FIG. 3 to FIG. 9. The following describes a communication device for performing the foregoing method provided in the embodiment of the present application. Those skilled in the art can understand that the methods and devices can be combined and referenced each other, and the devices provided in the embodiments of the present application can execute the above methods.

For example, in the method performed by the access network device 11 in the embodiment of the present application, the access network device 11 may be executed by the structure shown in FIG. 2A, and the actions sent or received by the access network device 11 may be performed by the access network device. The processor 1111 of 11 is completed by the antenna 1115, and the actions of determining or processing by the access network device 11 may be performed by the processor 1111 of the access network device 11. For example, the processor 1111 of the access network device 11 may send the time domain resource configuration information to the terminal 12 or the terminal 13 through the antenna 1115, such as the cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. One or more. For example, the processor 1111 of the access network device 11 may determine the SA slot resource pool instruction information and the DATA slot resource pool instruction information, and the processor 1111 of the access network device 11 may broadcast the SA slot resource pool instruction information through the antenna 1115. And DATA slot resource pool indication information. For example, the processor 1111 of the access network device 11 may determine the SA target slot indication information and the DATA target slot indication information, and the processor 1111 of the access network device 11 may send the SA target slot indication information to the terminal 12 through the antenna 1115. And DATA target slot indication information.

For example, in the embodiment of the present application, the method executed by the terminal 12 may be executed by the structure shown in FIG. 2B. The sending or receiving action of the terminal 12 may be performed by the processor 1211 of the terminal 12 through the antenna 1216. The terminal 12 Actions such as determination or processing may be performed by the processor 1211 of the terminal 12. For example, the processor 1211 of the terminal 12 may receive time domain resource configuration information from the access network device 11 through the antenna 1216, such as one of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, or Multiple. For example, the processor 1211 of the terminal 12 may receive SA slot resource pool indication information and DATA slot resource pool indication information from the access network device 11 through the antenna 1216. For example, the processor 1211 of the terminal 12 may receive the SA target slot indication information and the DATA target slot indication information from the access network device 11 through the antenna 1216. For example, the processor 1211 of the terminal 12 may determine the available symbols of the SA target slot, for example, the processor 1211 of the terminal 12 combines one of the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information, or Various available symbols for determining the SA target slot. For example, the processor 1211 of the terminal 12 may determine the available symbols of the DATA target slot, for example, the processor 1211 of the terminal 12 combines one of the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information, or Various symbols available to determine the DATA target slot. For example, the processor 1211 of the terminal 12 may send the SA to the terminal 13 through the available symbols of the antenna 1216 in the SA target time slot, and the processor 1211 of the terminal 12 may send the DATA to the terminal 13 through the available symbols of the antenna 1216 in the DATA target time slot.

For example, in the embodiment of the present application, the method executed by the terminal 13 may be executed by the structure shown in FIG. 2B. The sending or receiving action of the terminal 13 may be performed by the processor 1211 of the terminal 13 through the antenna 1216. The terminal 13 Actions such as determination or processing may be performed by the processor 1211 of the terminal 13. For example, the processor 1211 of the terminal 13 may receive time domain resource configuration information from the access network device 11 through the antenna 1216, such as one of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, or Multiple. For example, the processor 1211 of the terminal 13 may receive SA slot resource pool indication information and DATA slot resource pool indication information from the access network device 11 through the antenna 1216. For example, the processor 1211 of the terminal 13 may determine the available symbols of the SA target time slot. For example, the processor 1211 of the terminal 13 combines one of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, or Various available symbols for determining the SA target slot. For example, the processor 1211 of the terminal 13 may determine the available symbols of the DATA target time slot. For example, the processor 1211 of the terminal 13 combines one of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, or Various available symbols for determining the DATA target time slot, or the processor 1211 of the terminal 13 determines the available symbols of the DATA target time slot in combination with the available symbol indication information of the DATA target time slot carried in the SA. For example, the processor 1211 of the terminal 13 may receive the SA from the terminal 12 through the available symbols of the antenna 1216 in the SA target time slot, and the processor 1211 of the terminal 13 may receive the DATA from the terminal 12 through the available symbols of the antenna 1216 in the DATA target time slot.

In addition, in the embodiment of the present application, each step in the method performed by the access network device 11 includes a unit or module in the access network device 11 that performs each step in the method; each of the methods performed by the terminal 12 For each step, there is a unit or module in the terminal 12 that executes each step in the method; for each step in the method performed by the terminal 13, there is a unit or module in the terminal 13 that executes each step in the method.

The following describes a communication device 1000 provided by an embodiment of the present application. As shown in Figure 10:

The communication device 1000 includes a processing unit 1001 and a communication unit 1002. Optionally, the communication device 1000 further includes a storage unit 1002. The processing unit 1001, the communication unit 1002, and the storage unit 1002 are connected through a communication bus.

The communication unit 1002 may be a device with a transmitting and receiving function, and is configured to communicate with other network devices or a communication network.

The storage unit 1002 may include one or more memories, and the memory may be one or more devices or devices in a circuit for storing programs or data.

The storage unit 1002 may exist independently, and is connected to the processing unit 1001 through a communication bus. The storage unit may also be integrated with the processing unit 1001.

The communication device 1000 may be used in a communication device, a circuit, a hardware component, or a chip.

The communication device 1000 may be a terminal in the embodiment of the present application, such as the terminal 12 or the terminal 13. The schematic diagram of the terminal may be as shown in FIG. 2B. Optionally, the communication unit 1003 of the device 1000 may include an antenna and a transceiver of the terminal, such as the antenna 1216 and the transceiver 1212 in FIG. 2B. Optionally, the communication unit 1003 may further include an output device and an input device, such as the output device 1214 and the input device 1215 in FIG. 2B.

The communication device 1000 may be a chip in a terminal in the embodiments of the present application, such as a chip in the terminal 12 or a chip in the terminal 13. The communication unit 1003 may be an input or output interface, a pin, or a circuit. Optionally, the storage unit may store a computer-executable instruction of the method on the terminal side, so that the processing unit 1001 executes the method of the terminal 12 or the terminal 13 in the foregoing embodiment. The storage unit 1002 may be a register, a cache, or a RAM. The storage unit 1002 may be integrated with the processing unit 1001. The storage unit 1002 may be a ROM or other type of static storage device that can store static information and instructions. The storage unit 1002 may be connected with The processing units 1001 are independent. Optionally, with the development of wireless communication technology, the transceiver may be integrated on the communication device 1000, for example, the communication unit 1003 integrates the transceiver 1212.

When the communication device 1000 is a terminal or a chip in the terminal in the embodiment of the present application, the communication device 1000 may implement the method executed by the terminal 12 in the foregoing embodiment. For example, the communication unit 1003 may receive the time domain resource configuration information from the access network device 11, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. For details, refer to S301. -S302 related content. For example, the communication unit 1003 may receive the indication information of the SA slot resource pool and the indication of the DATA slot resource pool from the access network device 11, and may refer to the related content of S305-S306. For example, the communication unit 1003 may receive the SA target slot indication information and the DATA target slot indication information from the access network device 11, and may refer to the related content of S307. For example, the processing unit 1001 may determine the available symbols of the SA target time slot. For example, the processing unit 1001 may determine the SA target by combining one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. The available symbols of the time slot can refer to the related content of S309, S4A02, S4B03, S4C03 and S4D02. For example, the processing unit 1001 may determine the available symbols of the DATA target time slot. For example, the processing unit 1001 may determine one or more of the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information to determine the DATA target. The available symbols of the time slot can refer to the relevant content of S310. For example, the communication unit 1003 may send SA to the terminal 13 in the available symbols of the SA target slot, and may refer to the relevant content of S312, and the communication unit 1003 may send the DATA to the terminal 13 in the available symbols of the DATA target slot, and may refer to the relevant of S314. content. For other contents, please refer to the related contents in FIG. 3 to FIG. 9.

When the communication device 1000 is a terminal or a chip in the terminal in the embodiment of the present application, the communication device 1000 may implement the method performed by the terminal 13 in the foregoing embodiment. For example, the communication unit 1003 may receive time domain resource configuration information from the access network device 11, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. For details, refer to S303. -S304 related content. For example, the communication unit 1003 may receive the indication information of the SA slot resource pool and the indication of the DATA slot resource pool from the access network device 11, and may refer to the related content of S305-S306. For example, the processing unit 1001 may determine the available symbols of the SA target time slot. For example, the processing unit 1001 may determine the SA target by combining one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. The available symbols of the time slot can refer to the related content of S311. For example, the processing unit 1001 may determine the available symbols of the DATA target time slot. For example, the processing unit 1001 may determine one or more of the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information to determine the DATA target. The available symbols of the time slot can refer to the related content of S313. For example, the communication unit 1003 may receive SA from the terminal 12 at the available symbols of the SA target slot, and may refer to the relevant content of S312, and the communication unit 1003 may receive the DATA from the terminal 12 at the available symbols of the DATA target slot, and may refer to the relevant of S314. content. For other contents, please refer to the related contents in FIG. 3 to FIG. 9.

The communication device 1000 may be an access network device in the embodiment of the present application, such as the access network device 111 or the access network device 112. A schematic diagram of an access network device can be shown in FIG. 2A. Optionally, the communication unit 1003 of the apparatus 1000 may include an antenna and a transceiver of an access network device, such as the antenna 1115 and the transceiver 1113 in FIG. 2A. The communication unit 1003 may further include a network interface of an access network device, such as the network interface 1114 in FIG. 2A.

The communication device 1000 may be a chip in an access network device in the embodiments of the present application, such as a chip in the access network device 12 or the access network device 13. The communication unit 1003 may be an input or output interface, a pin, or a circuit. Optionally, the storage unit may store a computer execution instruction of the method on the access network device side, so that the processing unit 1001 executes the method on the access network device side in the foregoing embodiment. The storage unit 1002 may be a register, a cache, or a RAM. The storage unit 1002 may be integrated with the processing unit 1001. The storage unit 1002 may be a ROM or other type of static storage device that can store static information and instructions. The storage unit 1002 may be connected with The processing units 1001 are independent. Optionally, with the development of wireless communication technology, the transceiver may be integrated on the communication device 1000. For example, the communication unit 1003 integrates the transceiver 1113 and the network interface 1114.

When the communication device 1000 is an access network device or a chip in an access network device in the embodiment of the present application, the method performed by the access network device 11 in the foregoing embodiment may be implemented. The communication unit 1003 may send the time domain resource configuration information to the terminal 12 or the terminal 13, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. For details, refer to S301-S304. Related content in. For example, the processing unit 1001 may determine the SA slot resource pool indication information and the DATA slot resource pool indication information, and the communication unit 1003 may broadcast the SA slot resource pool indication information and the DATA slot resource pool indication information. For example, the processing unit 1001 may determine the SA target slot indication information and the DATA target slot indication information, and the communication unit 1003 may send the SA target slot indication information and the DATA target slot indication information to the terminal 12.

The following describes a communication device 1100 provided by an embodiment of the present application. As shown in Figure 11:

The communication device 1100 may include a communication unit 1101 and a determination unit 1102.

The communication device 1100 may be the terminal 12 in the embodiment of the present application. When the communication device 1100 is the terminal 12, the communication device 1100 may include the following functions:

The communication unit 1101 may receive time domain resource information from the access network device 11, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. You can refer to related content in S301-S302.

Optionally, the communication unit 1101 may receive SA slot resource pool indication information from the access network device 11. You can refer to related content in S305.

Optionally, the communication unit 1101 may receive the DATA slot resource pool indication information from the access network device 11. You can refer to related content in S306.

The determining unit 1102 may determine an SA target slot and a DATA target slot. You can refer to related content in S308.

The determination unit 1102 may also determine the available symbols of the SA target slot and the available symbols of the DATA target slot. You can refer to related content in S309.

Optionally, the determining unit 1102 may combine one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information to determine the available symbols of the SA target time slot and the availability of the DATA target time slot. symbol. You can refer to S4A02, S4B03, S4C03 and S4D02.

The communication unit 1101 may also send an SA to the terminal 13 on the available symbols of the SA target slot. You can refer to related content in S312.

The communication unit 1101 may also send DATA to the terminal 13 on the available symbols of the DATA target slot. You can refer to related content in S314.

When the communication device 1100 is the terminal 12, the communication device 1100 may also implement other functions implemented by the terminal 12, and reference may be made to the functions implemented by the terminal 12 in FIGS. 3 to 9.

The communication device 1100 may be the terminal 13 in the embodiment of the present application. When the communication device 1100 is the terminal 13, the communication device 1100 may include the following functions:

The communication unit 1101 may receive time domain resource information from the access network device 11, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. You can refer to the related content in S303-S304.

The determining unit 1102 may determine the available symbols of the SA target slot and the available symbols of the DATA target slot. You can refer to related content in S311 and S313.

Optionally, the determining unit 1102 may combine one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information to determine the available symbols of the SA target time slot and the availability of the DATA target time slot. symbol.

The communication unit 1101 may also receive SA from the terminal 12 on the available symbols of the SA target slot. You can refer to related content in S312.

The communication unit 1101 may also receive DATA from the terminal 12 on the available symbols of the DATA target slot. You can refer to related content in S314.

The communication device 1100 may also implement other functions implemented by the terminal 13, and reference may be made to the functions implemented by the terminal 13 in FIGS. 3 to 9.

The communication device 1100 may be the access network device 11 in the embodiment of the present application. When the communication device 1100 is the access network device 11, the communication device 1100 may include the following functions:

The communication unit 1101 may send time domain resource information to the terminal 12 or the terminal 13, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information. You can refer to the related content in S303-S304.

Optionally, the determining unit 1102 may be configured to determine SA reserved time slot and SA time slot resource pool indication information.

Optionally, the determining unit 1102 may be configured to determine DATA reserved time slots and DATA time slot resource pool indication information.

Optionally, the communication unit 1101 may broadcast SA slot resource pool indication information. You can refer to related content in S305.

Optionally, the communication unit 1101 may broadcast DATA time slot resource pool indication information. You can refer to related content in S306.

Optionally, the determining unit 1102 may be configured to determine an SA target time slot and a DATA target time slot, and the communication unit 1101 may further send the SA target time slot indication information or the DATA target time slot indication information to the terminal 12.

The communication device 1100 may also implement other functions implemented by the access network device 11, and reference may be made to the functions implemented by the access network device 11 in FIGS. 3 to 9.

It should be understood that the term “and / or” in this document is only an association relationship describing an associated object, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present invention The implementation process constitutes any limitation.

An embodiment of the present application further provides a computer-readable storage medium. The methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media can include computer storage media and communication media, and can also include any medium that can transfer computer programs from one place to another. A storage medium may be any target medium that can be accessed by a computer.

As an optional design, the computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium or instruction or data structure targeted for carrying The required program code is stored in a form and can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if you use coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared, radio, and microwave) to transfer software from a website, server, or other remote source, coaxial cable, fiber optic cable , Twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of the medium. Magnetic disks and optical discs as used herein include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), floppy discs and Blu-ray discs, where magnetic discs typically reproduce data magnetically, and optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

The embodiment of the present application also provides a computer program product. The methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the procedures or functions described in the foregoing method embodiments are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or another programmable device.

The specific embodiments described above further describe the objectives, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. The scope of protection, any modification, equivalent replacement, or improvement made on the basis of the technical solution of the present invention shall be included in the scope of protection of the present invention.

Claims

A D2D communication method, characterized in that the method includes:

Receiving first time domain resource configuration information from an access network device, where the first time domain resource configuration information is used to indicate that a symbol included in the first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, and the first time domain The resource includes at least one flexible symbol, and the first time domain resource includes a scheduling indication SA target slot;

Receiving second time domain resource configuration information from the access network device, where the second time domain resource configuration information is used to indicate that symbols included in the second time domain resource are uplink symbols, downlink symbols, or flexible symbols, and the second The time domain resource includes at least one flexible symbol, and the second time domain resource includes a data DATA target slot;

Determining the SA target slot and the DATA target slot;

Determining available symbols of the SA target slot;

Determining available symbols of the DATA target time slot;

Sending an SA to a second terminal on the available symbol of the SA target slot, where the SA carries DATA target slot indication information, and the DATA target slot indication information is used to indicate the DATA target slot;

Send DATA to a second terminal on the available symbols of the DATA target slot.
The method according to claim 1, further comprising:

Receiving SA target slot indication information and the DATA target slot indication information from an access network device, the SA target slot indication information is used to indicate the SA target slot, and the DATA target slot indication information is used to Indicating the DATA target time slot;

The determining the SA target time slot and the DATA target time slot includes:

Determining the SA target time slot according to the SA target time slot indication information;

Determining the DATA target time slot according to the DATA target time slot indication information.
The method according to claim 1 or 2, further comprising:

Receiving SA slot resource pool indication information and DATA slot resource pool indication information from an access network device, the SA slot resource pool indication information is used to indicate one or more SA reserved time slots, the one or more The SA reserved time slot includes the SA target time slot, the DATA time slot resource pool indication information is used to indicate one or more DATA reserved time slots, and the one or more DATA reserved time slots include the DATA Target time slot

Determine the SA target time slot and DATA target time slot, including:

Determining the SA target time slot according to the SA time slot resource pool indication information;

Determining the DATA target time slot according to the DATA time slot resource pool indication information;

The method further includes:

Determining the DATA target slot indication information.
The method according to any one of claims 1-3, wherein:

The SA also carries available symbol indication information of the DATA target slot, and the available symbol indication information of the DATA target slot is used to indicate the available symbol of the DATA target slot.
A D2D communication method, characterized in that the method includes:

Receiving first time domain resource configuration information from an access network device, where the first time domain resource configuration information is used to indicate that a symbol included in the first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, and the first time domain The resource includes at least one flexible symbol, and the first time domain resource includes an SA target time slot;

Receiving second time domain resource configuration information from the access network device, where the second time domain resource configuration information is used to indicate that symbols included in the second time domain resource are uplink symbols, downlink symbols, or flexible symbols, and the second The time domain resource includes at least one flexible symbol, and the second time domain resource includes a DATA target slot;

Receiving SA slot resource pool indication information, where the SA slot resource pool indication information is used to indicate one or more SA reserved time slots, and the one or more SA reserved time slots include the SA target time slot;

Determining available symbols of the SA target slot;

Receive an SA from the first terminal on the available symbol of the SA target slot, the SA includes DATA target slot indication information, and the DATA target slot indication information is used to indicate the DATA target slot ;

Determining available symbols of the DATA target time slot;

DATA is received from the first terminal on the available symbols of the DATA target slot.
The method according to any one of claims 1 to 5, wherein the first time domain resource configuration information is first cell-level semi-static configuration information;

The first cell-level semi-static configuration information is received through a system message.
The method according to claim 6, further comprising:

Receiving first user-level configuration information;

The first cell-level semi-static configuration information is further used to indicate that at least one symbol of the SA target slot is a flexible symbol;

The first user-level configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.
The method according to claim 7, wherein the determining the available symbols of the SA target time slot comprises:

Determining the available symbols of the SA target slot according to the first user-level configuration information.
The method according to claim 7, wherein the determining available symbols of the SA target time slot comprises:

Determining available symbols of the SA target time slot according to the first cell-level semi-static configuration information and the first user-level configuration information.
The method according to claim 8 or 9, wherein the first user-level configuration information includes first user-level dynamic configuration information;

The first user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol;

The first user-level dynamic configuration information is received on a group common physical downlink control channel GC PDCCH.
The method according to claims 1-5, characterized in that:

The first time domain resource configuration information is first user-level dynamic configuration information;

The first user-level dynamic configuration information is received from the access network device on a GC PDCCH.
The method according to claim 11, wherein the determining the available symbols of the SA target time slot comprises:

Determining the available symbols of the SA target slot according to the first user-level dynamic configuration information.
The method according to any one of claims 1-12, wherein the second time domain resource configuration information is second cell-level semi-static configuration information;

The second cell-level semi-static configuration information is received through a system message.
The method according to claim 13, further comprising:

Receiving second user-level configuration information;

The second cell-level semi-static configuration information is further used to indicate that at least one symbol of the DATA target slot is a flexible symbol;

The second user-level configuration information is used to indicate that the at least one flexible symbol of the DATA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.
The method according to claim 14, wherein the determining the available symbols of the DATA target time slot comprises:

Determining the available symbols of the DATA target slot according to the second user-level configuration information.
The method according to claim 14, wherein the determining available symbols of the DATA target time slot comprises:

Determining available symbols of the DATA target time slot according to the second cell-level semi-static configuration information and the second user-level configuration information.
The method according to any one of claims 14 to 16, wherein the second user-level configuration information includes second user-level dynamic configuration information;

The second user-level dynamic configuration information is used to indicate that the at least one flexible symbol of the SA target slot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol;

The second user-level dynamic configuration information is received on the GC PDCCH.
The method according to any one of claims 1-12, wherein:

The second time domain resource configuration information is second user-level dynamic configuration information;

The second user-level dynamic configuration information is received on the GC PDCCH from the access network device.
The method according to claim 18, wherein the determining the available symbols of the DATA target time slot comprises:

Determining the available symbols of the DATA target slot according to the second user-level dynamic configuration information.
A D2D communication method, characterized in that the method includes:

Receiving first time domain resource configuration information from an access network device, where the first time domain resource configuration information is used to indicate that a symbol included in the first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, and the first time domain The resource includes at least one flexible symbol, and the first time domain resource includes an SA target time slot;

Receiving SA slot resource pool indication information, where the SA slot resource pool indication information is used to indicate one or more SA reserved time slots, and the one or more SA reserved time slots include an SA target time slot;

Determining available symbols in the SA target slot;

Receiving an SA from the first terminal on the available symbols in the SA target slot, the SA includes DATA target slot indication information and available symbol indication information of the DATA target slot, and the DATA target slot The indication information is used to indicate a DATA target time slot, and the available symbol indication information of the DATA target time slot is used to indicate available symbols in the DATA target time slot;

Determining the available symbols of the DATA target slot according to the DATA target slot indication information and the available symbol indication information of the DATA target slot;

DATA is received on the available symbols of the DATA target slot.
The method according to any one of claims 1-20, wherein:

The available symbols of the SA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the SA slot.
The method according to any one of claims 1 to 21, wherein

The available symbols of the DATA target slot include one or more of an uplink symbol, a downlink symbol, and a flexible symbol of the DATA target slot.
A communication device includes a processor, the processor is coupled to a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction in the memory, so that the communication device executes a right A method according to any one of 1 to 22 is required.
A computer-readable storage medium is used to store a computer program or instruction, and when the computer program or instruction is executed, causes the computer to execute the method according to any one of claims 1 to 22.