CN110830965B

CN110830965B - D2D communication method, communication device and communication system

Info

Publication number: CN110830965B
Application number: CN201810913356.2A
Authority: CN
Inventors: 王亚飞; 马小骏; 张长; 张弛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2021-08-31
Anticipated expiration: 2038-08-10
Also published as: WO2020030172A1; CN110830965A

Abstract

In the D2D communication method, a terminal may receive time domain resource configuration information, where the time domain resource configuration information may indicate that symbols included in an SA target slot and a DATA target slot are an uplink symbol, a downlink symbol, and a flexible symbol, and after determining the SA target slot and the DATA target slot, the terminal may determine an available symbol of the SA target slot and an available symbol of the DATA target slot according to the time domain resource configuration information, then send an SA on the available symbol of the SA target slot, and send a DATA on the available symbol of the DATA target slot, thereby implementing D2D communication using the time domain resource of NR.

Description

D2D communication method, communication device and communication system

Technical Field

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

Background

Introduction of vehicle to outside information exchange (V2X) in NR is a key technology of future intelligent transportation systems. Applications of V2X may include vehicle to vehicle (V2V), vehicle to roadside infrastructure (V2I), vehicle to pedestrian (V2P), and vehicle to application server (V2N). The application of the V2X can improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency, vehicle-mounted entertainment information and the like. The V2X technology may be understood as one of device to device (D2D) technologies.

In the application of D2D, when a terminal communicates with another terminal, a transmitting terminal sends a Scheduling Assignment (SA) on a Physical Sidelink Control Channel (PSCCH) to indicate a time domain resource for DATA transmission, and a receiving terminal acquires DATA for transmission on the time domain resource indicated by the SA.

In the NR system, how to utilize the time domain resource for D2D communication is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method, a communication device and a communication system for D2D communication, which can utilize time domain resources to perform D2D communication in an NR system.

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

The method comprises the following steps: receiving first time domain resource configuration information from access network equipment, wherein the first time domain resource configuration information is used for indicating that symbols included in first time domain resources are uplink symbols, downlink symbols or flexible symbols, the first time domain resources include at least one flexible symbol, and the first time domain resources include scheduling indication (SA) target time slots; 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 a symbol included in a second time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the second time domain resource includes at least one flexible symbol, and the second time domain resource includes a DATA target timeslot; determining the SA target time slot and the DATA target time slot; determining available symbols of the SA target time slot; determining available symbols for the DATA target slot; sending an SA to a second terminal on the available symbol of the SA target slot, the SA carrying DATA target slot indication information, the DATA target slot indication information being used to indicate the DATA target slot; and transmitting DATA to the second terminal on the available symbol of the DATA target slot.

The method transmits SA on the available symbol of the SA target time slot and DATA on the available symbol of the DATA target time slot by determining the available symbol of the SA target time slot and the available symbol of the SA target time slot, thereby realizing D2D communication by using time domain resources in an NR system.

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 via a system message.

Optionally, in the method, the determining the available symbols of the SA target slot includes: and determining the available symbols of the SA target time 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 for indicating that at least one symbol of the SA target timeslot 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 timeslot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

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

Optionally, in the method, the determining available symbols of the SA target slot includes: and 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.

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 that the at least one flexible symbol of the SA target timeslot 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.

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 further used for indicating that at least one flexible symbol of the SA target timeslot indicated by the first cell-level semi-static configuration information 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 timeslot 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 that the at least one flexible symbol of the SA target timeslot 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 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, the determining the available symbols of the SA target slot includes: and determining the available symbols of the SA target time 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 via a system message.

Optionally, in the method, the determining the available symbols of the DATA target slot includes:

determining the available symbols for the DATA target slot based on 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 is used to indicate that the at least one flexible symbol of the DATA target timeslot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, in the method, the determining the available symbols of the DATA target slot includes: determining the available symbol for the DATA target slot based on the second user-level configuration information.

Optionally, in the method, the determining available symbols of the DATA target slot includes: determining available symbols for the DATA target slot based on 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 that the at least one flexible symbol of the SA target timeslot 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.

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 further used for indicating that at least one flexible symbol of the DATA target timeslot indicated by the second cell-level semi-static configuration information 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 timeslot 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 received on a 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 that the at least one flexible symbol of the SA target timeslot 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 a 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 a GC PDCCH.

Optionally, in the method, the determining the available symbols of the DATA target slot includes: determining the available symbols for the DATA target slot based on the second user-level dynamic configuration information.

Optionally, the method further includes: receiving SA target time slot indication information and the DATA target time slot indication information from an access network device, wherein the SA target time slot indication information is used for indicating the SA target time slot, and the DATA target time slot indication information is used for indicating the DATA target time slot;

the determining the SA target slot and the DATA target 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, from an access network device, SA slot resource pool indication information indicating one or more SA reservation slots including the SA target slot and DATA slot resource pool indication information indicating one or more DATA reservation slots including the DATA target slot;

determining the SA target slot and the DATA target slot, comprising: 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 comprises the following steps: the DATA target slot indication information is determined.

Optionally, in the method, the SA further carries available symbol indication information of the DATA target slot, where 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, the embodiment of the present application provides a D2D communication method, and the D2D communication method may be applied to a chip in a D2D terminal or a D2D terminal.

The method comprises the following steps: receiving third time domain resource configuration information from the access network device, where the third time domain resource configuration information is used to indicate that a symbol included in a third time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the third time domain resource includes at least one flexible symbol, and the third time domain resource includes an SA target slot; receiving fourth time domain resource configuration information from the access network device, where the fourth time domain resource configuration information is used to indicate that a symbol included in a fourth time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the fourth time domain resource includes at least one flexible symbol, and the fourth time domain resource includes a DATA target timeslot; receiving SA time slot resource pool indication information, wherein the SA time slot resource pool indication information is used for indicating one or more SA reserved time slots, and the one or more SA reserved time slots comprise the SA target time slot; determining available symbols of the SA target time slot; receiving an SA from the first terminal on the available symbol of the SA target slot, the SA including DATA target slot indication information indicating the DATA target slot; determining available symbols for the DATA target slot; receiving DATA from the first terminal on the available symbol of the DATA target slot.

The method receives SA on the available symbol of the SA target time slot and DATA on the available symbol of the DATA target time slot by determining the available symbol of the SA target time slot and the available symbol of the SA target time slot, thereby realizing D2D communication by using time domain resources in an NR system.

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

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

The method comprises the following steps: receiving third time domain resource configuration information from the access network device, where the third time domain resource configuration information is used to indicate that a symbol included in a third time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the third time domain resource includes at least one flexible symbol, and the third time domain resource includes an SA target slot; receiving SA time slot resource pool indication information, wherein the SA time slot resource pool indication information is used for indicating one or more SA reserved time slots, and the one or more SA reserved time slots comprise an SA target time slot; determining available symbols in the SA target time slot; receiving an SA from the first terminal on the available symbol in the SA target slot, the SA including DATA target slot indication information for indicating a DATA target slot and available symbol indication information for a DATA target slot for indicating an available symbol in the DATA target slot; determining the available symbol of the DATA target time slot according to the DATA target time slot indication information and the available symbol indication information of the DATA target time slot; DATA is received on the available symbol of the DATA target slot.

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

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

In the methods of the first to third aspects of embodiments of the present application, the available symbols of the DATA target slot include one or more of uplink symbols, downlink symbols, and flexible symbols of the DATA target slot.

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

The method comprises the following steps: sending first time domain resource configuration information to a first terminal, wherein the first time domain resource configuration information is used for indicating that a symbol included in a first time domain resource is an uplink symbol, a downlink symbol or a flexible symbol, the first time domain resource includes at least one flexible symbol, and the first time domain resource includes a scheduling indication (SA) target time slot; sending second time domain resource configuration information to the first terminal, wherein the second time domain resource configuration information is used for indicating that a symbol included in a second time domain resource is an uplink symbol, a downlink symbol or a flexible symbol, the second time domain resource includes at least one flexible symbol, and the second time domain resource includes a DATA DATA target time slot; sending third time domain resource configuration information to a second terminal, wherein the third time domain resource configuration information is used for indicating that a symbol included in a third time domain resource is an uplink symbol, a downlink symbol or a flexible symbol, the third time domain resource includes at least one flexible symbol, and the third time domain resource includes a DATA DATA target time slot; sending fourth time domain resource configuration information to the second terminal, wherein the fourth time domain resource configuration information is used for indicating that symbols included in fourth time domain resources are uplink symbols, downlink symbols or flexible symbols, the fourth time domain resources include at least one flexible symbol, and the fourth time domain resources include DATA DATA target time slots; broadcasting SA-slot resource pool indication information indicating one or more SA reservation slots including an SA target 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 to indicate that at least one symbol of the SA target timeslot 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 timeslot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, the first user-level configuration information includes one or more of first user-level semi-static configuration information and first user-level dynamic configuration information, where the first user-level semi-static configuration information is sent through an RRC message, and the first user-level dynamic configuration information is sent on a 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, where the first user-level semi-static configuration information is sent through an RRC message, and the first user-level dynamic configuration information is sent on a 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 to indicate that at least one symbol of the SA target timeslot 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 timeslot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, the second user-level configuration information includes one or more of second user-level semi-static configuration information and second user-level dynamic configuration information, where the second user-level semi-static configuration information is sent through an RRC message, and the second user-level dynamic configuration information is sent on a 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, where the second user-level semi-static configuration information is sent through an RRC message, and the second user-level dynamic configuration information is sent on a 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 to indicate that at least one symbol of the SA target timeslot 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 timeslot indicated by the third cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

Optionally, the third user-level configuration information includes one or more of third user-level semi-static configuration information and third user-level dynamic configuration information, where the third user-level semi-static configuration information is sent through an RRC message, and the third user-level dynamic configuration information is sent on a 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, where the third user-level semi-static configuration information is sent through an RRC message, and the third user-level dynamic configuration information is sent on a 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 to indicate that at least one symbol of the SA target timeslot 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 timeslot indicated by the fourth cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

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

Optionally, the method further includes: broadcasting DATA slot resource pool indication information, which may indicate one or more DATA reservation slots, including a DATA target slot.

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

The access network equipment indicates the SA target time slot or the DATA target time slot to the first terminal and the second terminal by taking the time slot as a unit, simplifies the process, can avoid the complexity of indicating the SA target time slot or the DATA target time slot to the first terminal and the second terminal by taking a symbol as a unit, is convenient for the first terminal and the second terminal to determine the available symbol of the SA target time slot and the available symbol of the DATA target time slot according to the received time domain resource configuration information, transmits the SA on the available symbol of the SA target time slot and transmits the DATA on the available symbol of the DATA target time slot.

In a fifth aspect, the present embodiments provide a communication device, which may be a terminal or a chip in a terminal, the communication device including a processor coupled with a memory, the memory being configured to store a computer program or instructions, and the processor being configured to execute the computer program or instructions in the memory, so that the communication device performs the method of the first aspect, and optionally, the communication device further includes the memory.

In a sixth aspect, the present application provides a communication apparatus, which may be a terminal or a chip in a terminal, and includes a processor coupled with a memory, the memory being configured to store a computer program or instructions, and the processor being configured to execute the computer program or instructions in the memory, so that the communication apparatus performs the method of the second aspect or the third aspect, and optionally, the communication apparatus further includes the memory.

In a seventh aspect, the present application provides a communication apparatus, which may be an access network device or a chip in an access network device, and includes a processor coupled with a memory, where the memory is configured to store a computer program or instructions, and the processor is configured to execute the computer program or instructions in the memory, so that the communication apparatus performs the method of the fourth aspect, and the communication apparatus further includes the memory.

In an eighth aspect, embodiments of the present application provide a computer storage medium for storing a computer program or instructions, which when run in a computer, causes the computer to perform the method of the first, second, third or fourth aspect.

In a ninth aspect, an embodiment of the present application provides a communication apparatus, which includes one or more modules, configured to implement the method of the first aspect, the second aspect, the third aspect, or the fourth aspect, where the one or more modules may correspond to the steps of the method of the first aspect, the second aspect, the third aspect, or the fourth aspect.

In a tenth aspect, an embodiment of the present application provides a computer program product, which includes a program that, when executed, causes the method of the first, second, third or fourth aspect to be performed.

In an eleventh aspect, the present embodiment provides a communication system, which includes two or three of the communication apparatus of the above fifth aspect, the communication apparatus of the above sixth aspect and the communication apparatus of the above seventh aspect, for example, the communication system includes the communication apparatus of the fifth aspect and the communication apparatus of the sixth aspect, or the communication system includes the communication apparatus of the fifth aspect and the communication apparatus of the seventh aspect, or the communication system includes the communication apparatus of the sixth aspect and the communication apparatus of the seventh aspect, or the communication apparatus includes the communication apparatus of the fifth aspect, the communication apparatus of the sixth aspect and the communication apparatus of the seventh aspect.

Drawings

In order to illustrate the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from these drawings by a person skilled in the art without inventive exercise.

Fig. 1 is a schematic diagram of a communication system provided in 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;

fig. 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 D2D communication using time domain resources in an NR system according to an embodiment of the present application;

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

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

fig. 4C is a schematic diagram of another method for determining available symbols of an SA target timeslot by the terminal 12 according to the embodiment of the present application;

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

fig. 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;

fig. 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 disclosure;

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

fig. 7A is a schematic diagram of a method for determining available symbols of an SA target timeslot according to an embodiment of the present application;

fig. 7B is a schematic diagram of another method for determining available symbols of an SA target timeslot according to an embodiment of the present application;

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

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

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

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

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 apparatus 1100 according to an embodiment of the present application.

Detailed Description

The technical solution 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. In communication system 10, access network equipment 11, terminal 12 and terminal 13 are included.

The terminal 12 and the terminal 13 may communicate directly, for example, the terminal 12 and the terminal 13 may communicate device to device (D2D).

D2D communication is to be understood as meaning that communication between terminals can take place directly, without the direct communication between the terminals having to go through the access network equipment. D2D may be referred to as Proximity Service (ProSe) or Proximity-Based Service (ProSe). D2D also includes vehicle to outside information exchange (V2X). The D2D technology may use wireless fidelity (WiFi) direct, FlashLinQ, bluetooth (bluetooth), zigbee (zigbee) and other technologies in addition to cellular communication based technologies.

The link over which terminal 12 and terminal 13 communicate directly may be referred to as a D2D link, a sidelink (sidelink), or other terminology. When the terminal 12 and the terminal 13 perform D2D communication, the terminal 12 and the terminal 13 may be referred to as a D2D terminal, where the terminal transmitting data is referred to as a D2D sender, and the terminal receiving data is referred to as a D2D receiver, for example, the terminal 12 transmits data to the terminal 13, the terminal 12 is a D2D sender, and the terminal 13 is a D2D receiver; alternatively, the terminal 13 transmits data to the terminal 12, where the terminal 13 is a D2D transmitter and the terminal 12 is a D2D receiver. In the embodiment of the present application, for convenience of description, the terminal 12 is taken as a D2D sending end, and the terminal 13 is taken as a D2D receiving end.

Terminal 12 or terminal 13 may or may not be in cellular communication with access network device 11. While the terminal 12 (or the terminal 13) performs cellular communication with the access network device 11, the terminal 12 (or the terminal 13) may perform D2D communication with the terminal 13 (or the terminal 12), for example, by Carrier Aggregation (CA) or Dual Connectivity (DC) technologies.

The D2D communication mode may be various, and in different types of wireless communication access systems, the D2D communication mode may be called differently, and the D2D communication mode in the embodiment of the present application may include D2D communication modes in various wireless communication access systems, and D2D communication modes that may occur in the future, for example, D2D communication modes that may occur in V2X. For example, the 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 legacy D2D, mode 3 and mode 4 may be communication modes in the (vehicle to evolution, V2X) domain, mode 3 is similar to mode 1, mode 4 is similar to mode 2, and in mode 1 and mode 3, the access network device 11 may allocate D2D time-frequency resources to the D2D terminal; in the mode 2 and the mode 4, the D2D terminal may autonomously select the D2D time-frequency resource, and the mode 2 and the mode 4 may include an out of coverage (OOC) mode and an edge of coverage (EOC) mode.

When D2D terminals (e.g. terminal 12 and terminal 13) have a D2D communication requirement, according to D2D, that the terminals (e.g. terminal 12 and terminal 13) are located in the coverage of the access network device 11, at the edge of the coverage of the access network device 11, or outside the coverage of the access network device 11, the D2D terminals (e.g. terminal 12 and terminal 13) may use different D2D communication modes to perform D2D communication, and the following description takes the terminal 12 as an example:

example one: terminal 12 may be located within the coverage of access network device 11 or at the edge of the coverage of access network device 11, terminal 12 may be in an RRC CONNECTED state (RRC CONNECTED) with access network device 11, access network device 11 may decide that terminal 12 uses mode 1 for D2D communication, or access network device 11 may decide that terminal 13 uses mode 2 for D2D communication, for example, access network device 11 may decide that terminal 13 uses EOC mode for D2D communication.

Example two: terminal 12 may be located within the coverage of access network device 11 or at the edge of the coverage of access network device 11, terminal 12 may be in an RRC IDLE state (RRC IDLE) with access network device 11, terminal 12 may use mode 2 for D2D communication, for example, terminal 12 may use EOC mode for D2D communication; alternatively, the terminal 12 may enter the RRC connected state, and refer to the relevant contents of example one.

Example three: terminal 12 may be located outside the coverage of access network device 11, e.g., terminal 12 moves from being located within the coverage of access network device 11 to the edge of coverage of access network device 11 or outside the coverage of access network device 11, terminal 12 may employ mode 2 for D2D communication, e.g., terminal 12 may employ OOC mode for D2D communication.

The access network device 11 in fig. 1 may be a device for supporting a terminal to access a communication system at an access network side, and may be, for example, a Base Transceiver Station (BTS) and a Base Station Controller (BSC) in a 2G access technology communication system, a node b (node b) and a Radio Network Controller (RNC) in a 3G access technology communication system, an evolved node b (eNB) in a 4G access technology communication system, a next generation base station (next generation node b, gNB) in a 5G access technology communication system, a Transmission Reception Point (TRP), a relay node (relay node), an access point (access point, AP), and the like.

Terminals 12 and 13 in fig. 1 may be devices that provide voice or data connectivity to a user, and may also be referred to as User Equipment (UE), mobile station (mobile station), subscriber unit (subscriber unit), station (station), Terminal Equipment (TE), and so on. The terminal may be a cellular phone (cellular phone), a Personal Digital Assistant (PDA), a wireless modem (modem), a handheld device (hand-held), a laptop computer (laptop computer), a cordless phone (cordless phone), a Wireless Local Loop (WLL) station, a tablet (pad), or the like. With the development of wireless communication technology, all devices that can access a communication system, can communicate with a network side of the communication system, or communicate with other objects through the communication system may be terminals in the embodiments of the present application, such as terminals and automobiles in intelligent transportation, home devices in smart homes, power meter reading instruments in smart grid, voltage monitoring instruments, environment monitoring instruments, video monitoring instruments in smart security networks, cash registers, and so on. 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. The structure of the access network device 11 may refer to the structure shown in fig. 2A.

The access network equipment 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, memory 1112, transceiver 1113, and network interface 1114 are connected, such as by 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 to other communication devices via a communication link, for example, the access network device connects to a core network element via the S1 interface. In the embodiment of the present application, the connection may include various interfaces, transmission lines, buses, and the like, which is not limited in this embodiment.

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

The memory in the embodiments of the present application, for example, the memory 1112, may include at least one of the following types: read-only memory (ROM) or other types of static memory devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic memory devices that may store information and instructions, and Electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory may also be, but is not limited to, a compact disk-read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, 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 that can be accessed by a computer.

The memory 1112 may be separate and coupled to the processor 1111. Alternatively, the memory 1112 may be integrated with the processor 1111, for example, within a chip. The memory 1112 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 1111 controls the execution of the program codes, and various executed computer program codes can also be regarded as drivers of the processor 1111. For example, the processor 1111 is configured to execute the computer program code stored in the memory 1112, thereby implementing the technical solution in the embodiment of the present application.

The transceiver 1113 may be configured to support reception or transmission of radio frequency signals between the access network devices and the terminals, and the transceiver 1113 may be coupled to the antenna 1115. The transceiver 1113 includes a transmitter Tx and a receiver Rx. Specifically, the one or more antennas 1115 may receive rf signals, and the receiver Rx of the transceiver 1113 is configured to receive the rf signals from the antennas, convert the rf signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 1111, so that the processor 1111 may further process the digital baseband signals or digital intermediate frequency signals, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 1113 is also configured to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 1111, convert the modulated digital baseband signal or the digital intermediate frequency signal into a radio frequency signal, and transmit the radio frequency signal through the one or more antennas 1115. Specifically, the receiver Rx may selectively perform one or more stages of down-mixing and analog-to-digital conversion processes on the rf signal to obtain a digital baseband signal or a digital intermediate frequency signal, wherein the order of the down-mixing and analog-to-digital conversion processes is adjustable. The transmitter Tx may selectively perform one or more stages of up-mixing and digital-to-analog conversion processes on the modulated digital baseband signal or the modulated digital intermediate frequency signal to obtain the rf signal, where the order of the up-mixing and the digital-to-analog conversion processes is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as a digital signal.

Fig. 2B is a schematic structural diagram of a terminal according to an embodiment of the present application. The structure of the terminal 12 or the terminal 13 may refer 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 coupled. Optionally, terminal 121 may also include an output device 1214, an input device 1215, and one or more antennas 1216. An antenna 1216 is coupled to the transceiver 1212, and an output device 1214 and an input device 1215 are coupled to the processor 1211.

The transceiver 1212, memory 1213, and antenna 1216 may perform similar functions as described with respect to fig. 2A.

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

The processor 1211 may be used to implement various functions for the terminal, such as processing a communication protocol and communication data, or controlling the entire terminal device, executing a software program, processing data of the software program; or to assist in completing computational processing tasks, such as processing of graphical images or audio, etc.; or processor 1211 may be used to perform one or more of the functions described above

The output device 1214 is in communication with the processor 1211 and may 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, a projector (projector), or the like. The input device 1215 is in communication with the processor 1211 and may accept user input in a variety of ways. For example, the input device 1215 can be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

When the communication system adopts a Long Term Evolution (LTE) radio access technology, the D2D communication may be performed by using cellular resources, where the cellular resources may include TDD resources and/or FDD resources, time domain resources for D2D communication may be allocated in units of subframes, and uplink subframes of TDD and/or FDD may be used for D2D communication. In TDD, in a wireless frame of 10ms, there are 7 uplink and downlink subframe allocations for TDD, and each uplink and downlink subframe allocation has a preset uplink subframe, a preset downlink subframe, and a preset special subframe. That is to say, after configuring the uplink and downlink subframe allocation for the terminal 12, the access network device 11 may use the uplink subframe to perform D2D communication, where all symbols in the uplink subframe are used for D2D communication. In FDD, uplink transmission and downlink transmission are distinguished by frequency domain, one subframe may be used for uplink transmission and downlink transmission at the same time, and D2D communication may be performed by using the subframe, where all symbols in the subframe are used for D2D communication.

In a New Radio (NR) system, D2D communication may be performed using cellular resources, which may include TDD resources and/or FDD resources, and time domain resources may be allocated in units of time slots or symbols instead of subframes. Different numbers of slots (slots) may be included in 1ms according to different subcarrier intervals, for example, when the subcarrier interval is 15kHz, 1ms includes 1 slot, and the slot occupies 1 ms; when the subcarrier spacing is 30kHz, 1ms includes 2 slots, each of which occupies 0.5 ms. One slot may include several symbols, for example, 12 or 14, which may all be used for uplink transmission; or, the several symbols may all be used for downlink transmission; or, a part of symbols are used for uplink transmission, and a part of symbols are used for downlink transmission; or, further, a part of the symbols are unknown (unknown) symbols, the unknown symbols may also be called flexible symbols, and the access network device may indicate the flexible symbols to the terminal for uplink transmission or downlink transmission.

In the NR system, TDD is not limited to TDD 7 uplink and downlink subframe allocations, and the system may determine a time slot for uplink transmission and a time slot for downlink transmission according to a scheduling condition; further, whether the flexible time slot is used for uplink transmission or downlink transmission can be determined according to the scheduling condition; alternatively, whether the flexible symbols are used for uplink transmission or downlink transmission may be decided according to the scheduling situation.

The method for D2D communication allocation using time domain resources in LTE is no longer applicable to NR systems, and therefore how to perform D2D communication using time domain resources in NR systems is a problem to be solved.

The embodiment of the application provides a scheme for performing D2D communication by using time domain resources in an NR system. In this scheme, the access network device 11 indicates the time domain resource used by the terminal 12 (or the terminal 13) for D2D communication in units of time slots, the terminal 12 (or the terminal 13) determines a symbol conforming to the D2D time domain resource type in combination with the terminal 12 (or the terminal 13) time domain resource configuration information, and then transmits the SA and the DATA on the symbol conforming to the D2D time domain resource type.

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

The time domain resource may be a resource on a continuous or discontinuous time domain, the time domain resource may include 1 or more symbols which are continuous or discontinuous, and a part of or all of the 1 or more symbols may belong to 1 or more slots.

The cell-level semi-static configuration information is used to indicate that a symbol included in a time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the cell level may be understood that the configuration information is valid for a terminal in a cell or the configuration information may be sent to a terminal of the cell, the semi-static state may be understood that the configuration information may be issued through a high-level signaling, and the high-level signaling may be understood as a signaling of a Radio Resource Control (RRC) layer, for example, the high-level signaling may be a system message, and the access network device may broadcast the system message, where the system message may carry the cell-level semi-static configuration information.

The user-level semi-static configuration information is used to indicate that a symbol included in a time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the user level may understand that the configuration information is valid for a specific terminal or the configuration information may be sent to the specific terminal, the semi-static state may understand that the configuration information may be issued through a higher layer signaling, and the higher layer signaling may understand signaling of a Radio Resource Control (RRC) layer, for example, the higher layer signaling may be an RRC message, and the access network device may send the RRC message to the terminal, where the RRC message may include the terminal-level semi-static configuration information.

The user-level dynamic configuration information is used to indicate that a symbol included in one time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, where the user level may understand that the configuration information is valid for a specific terminal or that the configuration information may be sent to the specific terminal, and the dynamic state may understand that the configuration information may be issued through physical layer information, for example, a physical layer signaling may be Downlink Control Information (DCI), an access network device may send the DCI through a Physical Downlink Control Channel (PDCCH), and the DCI may include terminal-level dynamic configuration information, where the PDCCH may be a Group Common (GC) PDCCH.

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

For convenience of description, in this embodiment of the present application, when a timeslot is used for uplink transmission, the timeslot may be referred to as an uplink timeslot, and all symbols in the timeslot are uplink symbols; when a timeslot is used for downlink transmission, the timeslot may be referred to as a downlink timeslot, and all symbols in the timeslot are downlink symbols at this time; when one symbol is used for uplink transmission, the symbol may be referred to as an uplink symbol; when one symbol is used for downlink transmission, the symbol may be referred to as a downlink symbol.

Fig. 3 is a schematic diagram of a method for 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, processor 1111 of access network device 11 may transmit the first time domain resource configuration information to terminal 12 through antenna 1115.

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

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.

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 negotiate, and the first time domain resource configuration information may indicate two of an uplink symbol, a downlink symbol, and a flexible symbol in the first time domain resource, where a symbol that is not indicated by the first time 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 a symbol that is not indicated as the uplink symbol or the downlink symbol in the first time domain resource configuration information is a flexible symbol.

In the two examples, the first time domain resource configuration information may indicate that the symbols included in the first time domain resource are uplink symbols, downlink symbols, or flexible symbols by indicating positions and numbers of the uplink symbols, the downlink symbols, or the flexible symbols.

The first time domain resource includes a scheduling indication SA target slot, which may be understood as a symbol in the SA target 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 slot may include at least one flexible symbol, or the first time domain resource other than the SA target 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 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, where 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 a 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, processor 1111 of access network device 11 may transmit the second time domain resource configuration information to terminal 12 through antenna 1115.

Accordingly, the terminal 12 receives the second time domain resource configuration information. For example, processor 1211 of terminal 12 may receive the second time domain resource configuration information from access network equipment 11 using 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, and the indication manner of the second time domain resource configuration information is not limited in this embodiment, and reference may be made to the indication manner of the first time domain resource configuration information in S301.

The second time domain resource comprises a DATA target slot, which may be understood as a symbol in the DATA target slot.

Optionally, the second time domain resource includes at least one flexible symbol. Alternatively, the DATA target slot may include at least one flexible symbol, or the first time domain resource other than the DATA target 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 the 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, which is 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, the access network device may only send the first time domain resource configuration information, and the first time domain resource indicated by the first time domain resource configuration information includes an SA target time slot and a DATA target time 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 is the same as the second cell-level semi-static configuration information, the access network device 11 may broadcast a system message, the system message includes the first cell-level semi-static configuration information, and the first time domain resource indicated by the first cell-level semi-static configuration information includes an SA target timeslot and a DATA target timeslot. For 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, the first user-level semi-static configuration information is the same as the second user-level semi-static configuration information, the access network device 11 may send an RRC message to the terminal 12, where the RRC message includes the first user-level semi-static configuration information, and the first time domain resource indicated by the first user-level semi-static configuration information includes an SA target timeslot and a DATA target timeslot. For 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, the first user-level dynamic configuration information is the same as the second user-level dynamic configuration information, the access network device 11 may send DCI to the terminal 12 through the PDCCH channel, where the DCI includes the 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 slot and a DATA target 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 first time domain resource includes an SA target timeslot, and the second time domain resource includes a DATA target timeslot. 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 is different from the second cell-level semi-static configuration information, the access network device 11 broadcasts two times of system messages, the first time of system messages includes the first cell-level semi-static configuration information, and the second time of system messages includes the second cell-level semi-static configuration information. For 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, the first user-level semi-static configuration information is different from the second user-level semi-static configuration information, 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. For 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, the first user-level dynamic configuration information is different from the second user-level dynamic configuration information, and the access network device 11 sends two DCIs through the PDCCH, where one DCI includes the first user-level dynamic configuration information and the other DCI includes the 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 domain resource configuration information is first user-level semi-static configuration information, and the second time domain resource configuration information is second cell-level semi-static configuration information or second user-level dynamic configuration information; or, the first time domain resource configuration information is first user-level dynamic configuration information, and the second time domain resource configuration information is second cell-level semi-static configuration information or second user-level semi-static configuration information, where how the access network device 11 issues the first time domain resource configuration information and the second time domain resource configuration information may refer to the relevant contents in S301 and S302, which is not described herein again.

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

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

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

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 indicating manner of the third time domain resource allocation information is not limited in the embodiment of the present application, and reference may be made to the indicating manner of the first time domain resource allocation information in S301.

The third time domain resource includes a scheduling indication SA target slot, which may be understood as a symbol in the SA target slot.

Optionally, the SA target timeslot included in the third time domain resource may be the same as the SA target timeslot 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 slot may include at least one flexible symbol, or a third time domain resource other than the SA target 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 the 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, which is not described herein again.

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

For example, processor 1111 of access network device 11 may send the fourth time domain resource configuration information to terminal 13 through 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 using the antenna 1216.

The fourth time domain resource configuration information is used to indicate that a symbol included in the fourth time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol. In the embodiment of the present application, the indication manner of the fourth time domain resource allocation information is not limited, and reference may be made to the indication manner of the first time domain resource allocation information in S301.

The fourth time domain resource includes a DATA destination slot, which may be understood as a symbol in an SA destination slot.

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

Optionally, the fourth time domain resource includes at least one flexible symbol. Alternatively, the DATA target slot may include at least one flexible symbol, or a fourth time domain resource outside the DATA target slot may include 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 the 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, which is not described herein again.

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, and specifically, the first time domain resource configuration information and the second time domain resource configuration information may be the same or different related contents, which is not described herein again.

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 first cell-level semi-static configuration information, the third time domain resource configuration information is third cell-level semi-static configuration information, the first cell-level semi-static configuration information and the third cell-level semi-static configuration information are the same, and S301 and S303 may be understood as a step, that is, the access network device 11 may broadcast a system message, where the system message includes the first cell-level semi-static configuration information, and both the terminal 12 and the terminal 13 may 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, the first user-level semi-static configuration information is the same as the third user-level semi-static configuration information, the RRC message that the access network device 11 may send to the terminal 12 includes the first user-level semi-static configuration information, and the RRC message that the access network device 11 may 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, the first user-level dynamic configuration information is the same as the third user-level dynamic configuration information, DCI that the access network device 11 may send to the terminal 12 through the PDCCH channel includes the first user-level dynamic configuration information, and DCI that the access network device 11 may 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, the third time domain resource configuration information is third cell-level semi-static configuration information, the first cell-level semi-static configuration information and the third cell-level semi-static configuration information are different, the access network device 11 broadcasts the system message twice, the first time system message includes the first cell-level semi-static configuration information, the terminal 12 receives the first time system message, the second time system message includes the third cell-level semi-static configuration information, and the terminal 13 receives the second time 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, the first user-level semi-static configuration information is different from the third user-level semi-static configuration information, 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, the first user-level dynamic configuration information is different from the third user-level dynamic configuration information, DCI sent by the access network device 11 to the terminal 12 through the PDCCH includes the first user-level dynamic configuration information, and 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 domain resource configuration information is first user-level semi-static configuration information, and the third time domain resource configuration information is third cell-level semi-static configuration information or third user-level dynamic configuration information; or, the first time domain resource configuration information is first user-level dynamic configuration information, and the third time domain resource configuration information is third cell-level semi-static configuration information or third user-level semi-static configuration information, where how the access network device 11 issues the first time domain resource configuration information and the third time domain resource configuration information may refer to relevant contents in S301 and S303, which is 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 the same or different related content of the first time domain resource configuration information and the third time domain resource configuration information may be referred to.

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 first cell-level semi-static configuration information, the second time domain resource configuration information is second cell-level semi-static configuration information, the third time domain resource configuration information is third cell-level semi-static configuration information, the fourth time domain resource configuration information is fourth cell-level semi-static configuration information, the first cell-level semi-static configuration information, the second cell-level semi-static configuration information, the third cell-level semi-static configuration information, and the fourth cell-level semi-static configuration information are the same, and the first time domain resource indicated by the first cell-level semi-static configuration information includes an SA target time slot and a DATA target time slot. S301, S302, S303 and S304 may be understood as a step in which the access network device 11 broadcasts a system message, the system message including first cell semi-static configuration information, the first cell semi-static configuration information including an SA target slot and a DATA target 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 first user-level dynamic configuration information, the second time domain resource configuration information is second user-level dynamic configuration information, the third time domain resource configuration information is third user-level dynamic configuration information, the fourth time domain resource configuration information is fourth user-level dynamic configuration information, and 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 different.

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

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

The SA slot resource pool indication information is used to indicate one or more SA reservation slots, the one or more SA reservation slots including 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 receive the SA slot resource pool indication information using the antenna 1216.

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

The DATA slot resource pool indication information is for indicating one or more DATA reservation slots, the one or more DATA reservation slots including the DATA target slot.

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

S306 is optional.

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

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

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

(1) there is S307. When the terminal 12 and the terminal 13 perform D2D communication in mode 1, the SA target slot and the DATA target slot may be determined by the access network device 11, and then the SA target slot indication information indicating the SA target slot and the DATA target slot indication information indicating the DATA target slot may be notified to the terminal 12.

(2) S307 is absent. When the terminal 12 and the terminal 13 perform D2D communication in mode 2, after the access network device 11 broadcasts the SA slot resource pool indication information and the DATA slot resource pool indication information in S305-S306, the SA target slot may be autonomously selected by the terminal 12 from the SA slot resource pool indicated by the SA slot resource pool indication information, and the DATA target slot may be autonomously selected by the terminal 12 from the DATA slot resource pool indicated by the DATA slot resource pool indication information.

Accordingly, the terminal 12 can 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 receive the SA target slot indication information and the DATA target slot indication information from the access network apparatus 11 using the antenna 1216.

S308: the terminal 12 determines the SA target slot and the DATA target slot.

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

The terminal 12 determines that the SA target slot and the DATA target slot may have two examples as follows:

(1) there is S307, when the terminal 12 and the terminal 13 perform D2D communication in the mode 1, the terminal 12 may determine the SA target time slot according to the SA target time slot indication information, and the terminal 12 may determine the DATA target time slot according to the DATA target time slot indication information.

(2) Without S307, when the terminal 12 and the terminal 13 perform D2D communication using mode 2, the terminal 12 may determine the SA target slot according to the SA slot resource pool information, and the terminal 12 may determine the DATA target slot according to the DATA slot resource pool information. For example, the SA slot resource pool indication information indicates one or more SA reservation slots, the terminal 12 may select a SA target slot from 1 or more SA reservation slots, the DATA slot resource pool indication information indicates one or more DATA reservation slots, and the terminal 12 may select a DATA target slot from 1 or more DATA reservation slots.

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

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

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

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

Optionally, all symbols of the SA target slot may be uplink symbols, and the available symbols of the SA target slot may include all symbols of the SA target slot; or, the partial symbols of the SA target slot are uplink symbols, and the available symbols of the SA target slot may include the partial symbols of the SA target slot, which are uplink symbols.

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

Optionally, all symbols of the SA target slot may be flexible symbols, and the available symbols of the SA target slot may include all symbols of the SA target slot; or, the partial symbols of the SA target slot are flexible symbols, and the available symbols of the SA target slot may include partial symbols of the SA target slot, which are flexible symbols.

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

Optionally, the SA target timeslot does not include a downlink symbol, and the available symbols of the SA target timeslot may include all symbols of the SA target timeslot; or, the SA target slot includes a downlink symbol, and the available symbols of the SA target slot may include an uplink symbol and a flexible symbol of the SA target slot.

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

Optionally, all symbols of the SA target slot may be downlink symbols, and the available symbols of the SA target slot may include all symbols of the SA target slot; or, the partial symbols of the SA target slot are downlink symbols, and the available symbols of the SA target slot may include partial symbols of the SA target slot, which are downlink symbols.

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

Optionally, the SA target timeslot does not include an uplink symbol, and the available symbols of the SA target timeslot may include all symbols of the SA target timeslot; or, the SA target slot includes an uplink symbol, and the available symbols of the SA target slot may include a downlink symbol and a flexible symbol of the SA target slot.

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

Optionally, the first time domain resource configuration information indicates that a symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may determine an available symbol of the SA target timeslot according to the first time domain resource configuration information. Optionally, other configuration information may indicate that a symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may also determine an available symbol of the SA target timeslot according to the other configuration information, which is not limited in this embodiment of the present application.

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

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

Optionally, when step S307 does not exist, the method may further include determining, by the terminal 12, indication information of available symbols of a DATA target slot, where the indication information of available symbols of the DATA target slot is used for indicating the available symbols of the DATA target slot.

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

(1) said available symbols of said DATA target slot include upstream symbols of said DATA target slot.

Optionally, all symbols of the DATA target slot may be uplink symbols, and the available symbols of the DATA target slot may include all symbols of the DATA target slot; alternatively, the part of the symbols of the DATA target slot are uplink symbols, and said available symbols of said DATA target slot may comprise part of the symbols of the DATA target slot, which are uplink symbols.

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

Optionally, all symbols of the DATA target slot may be flexible symbols, and said available symbols of said DATA target slot may include all symbols of the DATA target slot; alternatively, the partial symbols of the DATA target slot are flexible symbols, and said available symbols of said DATA target slot may comprise partial symbols of the DATA target slot, which are flexible symbols.

(3) The available symbols of the DATA target slot include upstream symbols and flexible symbols of the DATA target slot.

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

(4) Said available symbols of said DATA target slot include downlink symbols of said DATA target slot.

Optionally, all symbols of the DATA target slot may be downlink symbols, and the available symbols of the DATA target slot may include all symbols of the DATA target slot; alternatively, the part of symbols of the DATA target slot is downlink symbols, and said available symbols of said DATA target slot may comprise part of symbols of the DATA target slot, which are downlink symbols.

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

Optionally, the DATA target time slot does not include an uplink symbol, and the available symbols of the DATA target time slot may include all symbols of the DATA target time slot; alternatively, the DATA target slot includes an uplink symbol, and the available symbols of the DATA target slot may include a downlink symbol and a flexible symbol of the DATA target slot.

(6) The available symbols of the DATA target slot include upstream symbols, flexible symbols, and downstream symbols of the DATA target slot.

Optionally, the second time domain resource configuration information indicates that the symbol included in the DATA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may determine an available symbol of the DATA target timeslot according to the second time domain resource configuration information. Optionally, other configuration information may indicate that a symbol included in the DATA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may also determine an available symbol of the DATA target timeslot according to the other configuration information, which is not limited in this embodiment of the present application.

S311: the terminal 13 determines available symbols of the SA target slot.

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

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

Here, the available symbols of the SA target slot may refer to the relevant contents of the available symbols of the SA target slot in S309.

Alternatively, in S305, the terminal 12 may receive SA slot resource pool indication information, which may indicate one or more SA reservation slots including the SA target slot, the terminal 12 may not know which slots of the one or more SA reservation slots are the SA target slot, and in S311, the terminal 13 may determine available symbols of the one or more SA reservation slots.

Optionally, the third time domain resource configuration information indicates that the symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may determine the available symbol of the SA target timeslot according to the third time domain resource configuration information. Optionally, other configuration information may indicate that a symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may also determine an available symbol of the SA target timeslot according to the other configuration information, which is not limited in this embodiment of the present application.

S312: the terminal 12 transmits the SA on the available symbols of the SA target slot.

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

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

Optionally, in S311, the terminal 13 may determine available symbols of the one or more SA reservation slots, and then detect on the available symbols of the one or more SA reservation slots, where the available symbols of the slot where the SA is detected are available symbols of an SA target slot.

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

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

S313: the terminal 13 determines the available symbols of the DATA target slot.

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

The available symbols of the DATA target slot include one or more of uplink symbols, downlink symbols, and flexible symbols of the DATA target slot, and reference may be made to the relevant contents of the available symbols of the DATA target slot in S310.

The terminal 13 may obtain DATA target timeslot indication information carried by the SA after receiving the SA in S312, determine the DATA target timeslot according to the DATA target timeslot indication information, and then determine an available symbol of the DATA target timeslot.

Optionally, the fourth time domain resource configuration information indicates that the symbol included in the DATA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 13 may determine an available symbol of the DATA target timeslot according to the fourth time domain resource configuration information. Optionally, other configuration information may indicate that a symbol included in the DATA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 13 may also determine an available symbol of the DATA target timeslot according to the other configuration information, which is not limited in this embodiment of the present application.

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

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

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

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

D2D communication using time domain resources in NR systems is achieved by terminals 12 and 13 determining available symbols for SA target slots and DATA target slots, transmitting SAs on available symbols for SA target slots and DATA on available symbols for DATA target slots.

In the following, how the terminal 12 determines the available symbols of the SA target timeslot is further described with reference to fig. 4A, fig. 4B and fig. 4C, which can be understood as several examples of S301 and S309 in fig. 4A, fig. 4B and fig. 4C, and the contents thereof can be combined with those in fig. 3.

Fig. 4A is a diagram illustrating a method for the terminal 12 to determine available symbols for the SA target slot. As shown in fig. 4A:

S4A 01: 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, in S301, the first time domain resource configuration information is first cell-level semi-static configuration information, which is received through a system message, and others may refer to relevant content in S301.

S4A 02: the terminal 12 determines the available symbols of the SA target 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 a symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, and the terminal 12 may determine an available symbol of the SA target timeslot according to the first cell-level semi-static configuration information.

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

Fig. 4B is a diagram illustrating another method for the terminal 12 to determine the available symbols for the SA target slot. As shown in fig. 4B:

S4B 01: 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 the relevant content in S301.

S4B 02: the access network device 11 sends the first user-level configuration information to the terminal 12.

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

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

S4B 03: the terminal 12 determines the available symbols of the SA target slot according to the first user-level configuration information.

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

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

Fig. 4C is a diagram illustrating another method for the terminal 12 to determine the available symbols for the SA target slot. Fig. 4C illustrates determining available symbols for an SA target slot based on the first cell-level semi-static configuration information and the first user-level configuration information, as shown in fig. 4B:

S4C 01: 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 the relevant content in S301.

S4C 02: the access network device 11 sends the first user-level configuration information to the terminal 12.

The relevant content of the first user-level configuration information may refer to the relevant content in S4B02, and will not be described herein.

S4C 03: the terminal 12 determines available symbols of the SA target 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 available symbols of the SA target 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 timeslot, and an available symbol of the SA target timeslot may be determined according to the first cell-level semi-static configuration information and the first user-level configuration information. For example, first, an uplink symbol and a downlink symbol of the SA target slot are determined according to the first cell-level semi-static configuration information, and for a flexible symbol configured by the first cell-level semi-static configuration information, the flexible symbol is further determined as the uplink symbol, the downlink symbol or the flexible symbol by combining with the first user-level configuration information, and then an available symbol of the SA target slot is determined.

In fig. 4B and 4C above, the first user-level configuration information may have a plurality of cases, and the following is further described with reference to the plurality of cases of the first user-level configuration information and the contents of fig. 4B and 4C.

(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 timeslot 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 access network device 11 sends the first user-level semi-static configuration information to terminal 12, for example, access network device 11 sends the first user-level semi-static configuration information to terminal 12 through an RRC message; S4B03 may be that the terminal 12 determines the available symbols of the SA target time slot based on the first user-level semi-static configuration information.

S4C02 may be that access network device 11 sends the first user-level semi-static configuration information to terminal 12, for example, access network device 11 sends the first user-level semi-static configuration information to terminal 12 through an RRC message; in S4C03, the terminal 12 determines an available symbol of the SA target timeslot according to the first cell-level semi-static configuration information and the first user-level semi-static configuration information.

(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 timeslot 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 determines the available symbols of the SA target slot according to the first user-level dynamic configuration information.

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 determines available symbols of the SA target timeslot according to the first cell-level semi-static configuration information and the first user-level dynamic configuration information.

(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 for indicating that at least one flexible symbol of the SA target timeslot indicated by the first cell-level semi-static configuration information 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 timeslot indicated by the first user-level semi-static configuration information is an uplink symbol or a downlink symbol.

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

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

Fig. 4D is a diagram illustrating another method for the terminal 12 to determine the available symbols for the SA target slot. Fig. 4D illustrates the determination of available symbols for SA target slots based on the first user-level dynamic configuration information, as shown in fig. 4D:

S4D 01: 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 the relevant content in S301.

The first user-level dynamic configuration information indicates 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 resource includes an SA target timeslot. 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 on the GC PDCCH by the access network device 11 to the terminal 12.

S4D 02: the terminal 12 determines the available symbols of the SA target timeslot according to the first user-level dynamic configuration information.

Since the first user-level dynamic configuration information indicates that the symbol included in the SA target timeslot is an uplink symbol, a downlink symbol, or a flexible symbol, the terminal 12 may determine an available symbol of the SA target timeslot according to the first user-level dynamic configuration information.

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

The above description is made on how the terminal 12 determines the available symbols of the SA target slot, and the following description is made on how the terminal 12 determines the available symbols of the DATA target slot, and the following can be understood as several examples of S302 and S310, the contents of which can be combined with those of fig. 3.

The available symbols for the terminal 12 to determine the DATA target slot are similar to the available symbols for the terminal 12 to determine the SA target slot, except that the time domain resource configuration information for the available symbol combination for the DATA target slot may be different from the time domain resource configuration information for the available symbol combination for the SA target slot, e.g., the first time domain resource configuration information for the available symbol for the SA target slot and the second time domain resource configuration information for the available symbol for the DATA target slot may be different. The determination of the available symbols for the DATA target slot by the terminal 12 may refer to the determination of the available symbols for the SA target slot by the terminal 12 as described above.

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 the related content in S302 may be referred to.

In S310, said determining said available symbols for said DATA target slot comprises: determining the available symbols of the DATA target time slot based on the second cell-level semi-static configuration information.

As a second embodiment:

The method shown in fig. 3 further comprises: 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 timeslot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

In S310, said determining said available symbols for said DATA target slot comprises: determining the available symbols for the DATA target time slot based on the second user-level configuration information.

As a third embodiment:

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

In the second and third embodiments described above, the second user-level configuration information may have a plurality of cases:

(1) the second user-level configuration information comprises 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 timeslot 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 comprises 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 timeslot 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 a GC PDCCH.

(3) The second user-level configuration information comprises 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 for indicating that at least one flexible symbol of the SA target timeslot indicated by the second cell-level semi-static configuration information 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 timeslot 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 received on a group common physical downlink control channel GC PDCCH.

As a fourth embodiment:

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, said determining said available symbols for said DATA target slot comprises: and determining available symbols of the SA target time slot according to the second user-level dynamic configuration information.

The difference between the determination of the available symbols of the SA target timeslot by the terminal 13 and the determination of the available symbols of the SA target timeslot by the terminal 12 is that (1) after the terminal 13 receives the SA timeslot resource pool indication information, the SA timeslot resource pool indication information may indicate one or more SA reserved timeslots, where the one or more SA reserved timeslots may include the SA target timeslot, and the terminal 13 may not know which timeslots of the one or more SA reserved timeslots are SA target timeslots, and the terminal 13 may determine that the one or more SA reserved timeslots are all SA target timeslots, and determine the available symbols of the SA target timeslots; (2) the time domain resource configuration information of the available symbol combination of the SA target slot determined by the terminal 13 and the time domain resource configuration information of the available symbol combination of the SA target slot determined by the terminal 12 may be different, for example, the third time domain resource configuration information of the available symbol of the SA target slot determined by the terminal 13 and the first time domain resource configuration information of the available symbol of the SA target slot determined by the terminal 12 may be different. The terminal 13 determines the available symbol of the SA target slot, which may refer to the content of the available symbol of the SA target slot determined by the terminal 12, for example, the terminal 12 in fig. 4A, 4B, 4C and 4D may be replaced by the terminal 13, and the first is replaced by the third.

The determination of the available symbols of the DATA target slot by the terminal 13 is similar to the determination of the available symbols of the DATA target slot by the terminal 12, as described above, except that the time domain resource configuration information of the available symbol combination of the DATA target slot determined by the terminal 13 and the time domain resource configuration information of the available symbol combination of the DATA target slot determined by the terminal 12 may be different, for example, the fourth time domain resource configuration information of the available symbol of the DATA target slot determined by the terminal 13 and the second time domain resource configuration information of the available symbol of the DATA target slot determined by the terminal 12 may be different. The determination of the available symbols of the DATA target slot by the terminal 13 may refer to the determination of the content of the available symbols of the DATA target slot by the terminal 12 as described above, for example, the second of the contents of the available symbols of the DATA target slot determined by the terminal 12 may be replaced with the fourth. For example, the processor 1211 of the terminal 13 may determine available symbols for the DATA target slot.

Alternatively, when the SA in S312 carries the available symbol indication information of the DATA target slot, the terminal 13 may determine the available symbol 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 available symbols of the DATA target slot according to the available symbol indication information of the DATA target slot.

The cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information that are present in the implementation of the present application are described below with reference to examples.

The access network device 11 may allocate a plurality of Bandwidth parts (BWPs) to the terminal 12 and the terminal 13 before transmitting the cell-level semi-static configuration information, the user-level semi-static configuration information or the user-level dynamic configuration information to the terminal 12 and the terminal 13, and the BWPs of the terminal 12 and the terminal 13 may be the same or different, each BWP having a subcarrier spacing.

BWP is a continuous or discontinuous resource in the frequency domain, for example, BWP may be K (K is an integer greater than or equal to 1) subcarriers; alternatively, BWP may be M (M is an integer equal to or greater than 1) consecutive or non-consecutive Resource Blocks (RBs); alternatively, BWP may be N (N is an integer equal to or greater than 1) contiguous or non-contiguous Resource Block Groups (RBGs), where one RBG may include a plurality of RBs, and one RB may include a plurality of subcarriers, for example, one RBG may include 2, 4, 8, or 16 RBs, and one RB includes 12 subcarriers. The BWP may belong to a paired spectrum (paired spectrum) or an unpaired spectrum (unpaired spectrum), and may also be referred to as a subband, a narrowband, a bandwidth resource, a frequency resource portion, a partial frequency resource, a carrier BWP, or other names, which is not limited in this application.

For example, the access network device 11 allocates 2 BWPs to the terminal 12, which are BWP1 and BWP2, respectively, where the subcarrier spacing of BWP1 is 30kHz and the subcarrier spacing of BWP2 is 60 kHz. The access network device 11 may allocate BWP1 to the terminal 13, where the subcarrier interval of the BWP1 is 30kHz, and for convenience of description, the access network device 11 will be described as an example that allocates BWP1 to both the terminal 12 and the terminal 13, it should be noted that the BWPs allocated to the terminal 12 and the terminal 13 by the access network device 11 may be the same or different, and the embodiments of the present application are not limited thereto.

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

One, cell level semi-static configuration information

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

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

The time domain resource indicated by the cell-level semi-static configuration information may be determined according to a downlink time domain resource-flexible time domain resource-uplink time domain resource manner, as shown in fig. 5A, different time domain resources are distinguished by different shadows, for example, a grid shape represents the downlink time domain resource, a dot shape represents the flexible time domain resource, and an oblique line shape represents the uplink time domain resource. For example, the downlink time domain resource includes m time slots and x symbols after the m time slots, the uplink time domain resource may include n time slots and y symbols before the n time slots, and the flexible time domain resource may be a continuous time domain resource between the downlink time domain resource and the uplink time domain resource, and may include a continuous flexible time slot and a flexible symbol that is continuous before and after the flexible time slot.

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

Taking the first cell-level semi-static configuration information as an example, the access network device 11 may broadcast the first cell-level semi-static configuration information.

For example, the first cell-level semi-static configuration information includes: the reference subcarrier interval is 15kHz, the time domain resource period is 5ms, and the time domain resource allocation information corresponding to the reference subcarrier interval is: the number of downlink time slots is 1, the number of downlink symbols is 3, the number of uplink time slots is 1, and the number of uplink symbols is 4.

Fig. 5B is a diagram illustrating a time domain resource indicated by the first cell-level semi-static configuration information. The example is described in which one slot includes 14 symbols, it should be noted that one slot may include other numbers of symbols, for example, 12, 6, or 7, which is not limited in this embodiment of the present application.

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

Terminal 12, upon receiving the first cell-level semi-static configuration information, may determine an allocation of time domain resources corresponding to BWP1 subcarrier spacing.

The reference subcarrier spacing is 15kHz and the BWP1 subcarrier spacing is 30kHz, then 1 symbol for the reference subcarrier spacing corresponds to 2 symbols for the BWP1 subcarrier spacing and 1 slot for the reference subcarrier spacing corresponds to 2 slots for the BWP1 subcarrier spacing.

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

Second, user-level semi-static configuration information

The user-level semi-static configuration information may indicate that a symbol included in one time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, for example, the time domain resource may be 1 or more continuous or discontinuous time slots.

The user-level semi-static configuration information may further configure a timeslot configured by the cell-level semi-static configuration information, where the cell-level semi-static configuration information may indicate that at least one symbol of the timeslot is a flexible symbol, and the user-level semi-static configuration information may configure at least one flexible symbol of the timeslot 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, and the user-level semi-static configuration information may still configure the uplink symbol or the downlink symbol of the timeslot configured by the cell-level semi-static configuration information as an uplink symbol or a downlink symbol. Alternatively, the user-level semi-static configuration information configured time slots may not have been configured via the cell-level semi-static configuration information.

The user-level semi-static configuration information may configure the time domain resources at a reference subcarrier spacing, which may be the same as the subcarrier spacing of the cell-level semi-static configuration information.

The user-level semi-static configuration information may include an index (index) of at least one slot, and the number of downlink symbols and the number of uplink symbols in the at least one slot, where the index of the at least one slot may be an index of a slot in a time domain resource configured by the cell-level semi-static configuration information or a position relative to a current slot, for example, the current slot, a slot next to the current slot or a 2 nd slot after the current slot, and so on.

Fig. 5C is a schematic diagram of time domain resources indicated by the 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 in a downlink symbol-flexible symbol-uplink symbol manner. The flexible symbols are symbols between downlink symbols and uplink symbols.

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

The first user-level semi-static configuration information is taken as an example for explanation. Access network device 11 may send the first user-level semi-static configuration information to terminal 12 and terminal 13, respectively, via an RRC message.

For example, the first user-level semi-static configuration information includes: and in the time slot 3, the number of downlink symbols is 2, and the number of uplink symbols is 3.

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

The first 2 symbols of the time slot 3 corresponding to the reference subcarrier interval are downlink symbols, the 3 rd to 11 th symbols of the time slot 3 are flexible symbols, and the last 3 symbols are uplink symbols.

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

Second, user-level dynamic configuration information

The user-level dynamic configuration information may indicate that a symbol of one time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, for example, the time domain resource may be 1 or more continuous or discontinuous time slots.

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

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

The user-level dynamic configuration information may configure a time domain resource that is not configured by the cell-level semi-static configuration information or the user-level semi-static configuration information, that is, a time domain resource is not configured by the cell-level semi-static configuration information and the user-level semi-static configuration information, and is configured directly by the user-level dynamic configuration information, for example, for a time domain resource corresponding to an uplink BWP and a downlink BWP of a paired spectrum, it may be configured directly by the user-level dynamic configuration information without being configured by the cell-level semi-static configuration information or the user-level semi-static configuration information.

The user-level dynamic configuration information may configure the time domain resources at a reference subcarrier spacing that may be the same as the reference subcarrier spacing for the cell-level semi-static configuration information or the same as the reference subcarrier spacing for the user-level semi-static configuration information, e.g., where the reference subcarrier spacing is 15 kHz.

The access network device 11 sends the user-level dynamic configuration information to the terminal 12 or the terminal 13 on a physical channel. For example, the access network apparatus 11 may transmit Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH), which may be a Group Common (GC) PDCCH, and the DCI format may be 2. Optionally, before sending the DCI on the PDCCH, the access network device 11 may send, to the terminal 12, a frequency domain resource, a time domain resource, and a descrambling sequence for detecting the DCI. The terminal 12 receives the DCI with the descrambling sequence on the frequency domain resources and the time domain resources accordingly.

The user-level dynamic configuration information may include SF combination index information, where the SF combination index information may indicate an SF combination, where the SF combination may indicate 1, 2, or more SF indexes, where the SF index may indicate an SF, and where each symbol in a slot may be an uplink symbol, a downlink symbol, or a flexible symbol.

How the SF combination index information indicates the SF combination, and how the SF combination indicates 1, 2 or more SF indexes will be described below.

The terminal and the access network device may configure a corresponding relationship between the SF combination index and the SF combination, for example, the access network device 11 may send the corresponding 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 may be shown in table 1 below, it should be noted that table 1 is only one expression of the correspondence between the SF combination index and the SF combination, and the correspondence between the SF combination index and the SF combination may be expressed in other forms such as a character string or a formula, which is not limited in this embodiment of the present application.

SF composite index	SF combination
		0	0
1	24,45
		2	0,27
···	···

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, the 1, 2 or more SF indexes may respectively indicate SFs of 1, 2 or more slots, for example, a first SF index of an SF combination may indicate an SF of a first slot corresponding to a reference subcarrier interval, a second SF index indicates an SF of a second slot corresponding to the reference subcarrier interval, and so on. The current first time slot may be understood as the current time slot, or may be understood as a time slot next to the current time slot, and the second time slot may be understood as a time slot immediately after the first time slot.

Taking the first user-level dynamic configuration information as an example, 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 a SF combination index of 1, the SF combination index of 1 may indicate a SF combination, the SF combination indicates two SF indexes, 24 and 45 respectively, the SF index of 24 may indicate the SF of the current time slot corresponding to the reference subcarrier spacing, and the SF index of 45 may indicate the SF of the next time slot of the current time slot corresponding to the reference subcarrier spacing. For example, terminal 12 receives user-level dynamic configuration information at time slot 2 corresponding to the reference subcarrier spacing of 15kHz (it may also be understood that terminal 12 receives user-level dynamic configuration information at time slot 3 or time slot 4 corresponding to the BWP1 subcarrier spacing), then time slot 2 is the current time slot and 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 is further described below.

The access network device and the terminal may configure a corresponding relationship between the SF index and the SF, for example, the access network device 11 and the terminal 12 may configure a corresponding relationship between the SF index and the SF, and for example, may write the SF index and the SF into the access network device 11 and the terminal 12 in a static manner. For example, the correspondence between the SF index and the SF may be as shown in table 2, it should be noted that table 2 is only one expression form of the correspondence between the SF index and the SF, and the correspondence between the SF index and the SF may be expressed in other forms such as a character string or a formula, which is not limited in this embodiment of the present application.

As shown in table 2, 1 SF index may indicate 1 SF, and 1 SF may indicate that a symbol included in 1 slot is a downlink symbol, a flexible symbol, or an uplink symbol, where an SF may indicate a symbol included in a slot in a downlink number-flexible symbol-uplink symbol manner.

For example, the SF index 24 may indicate that the first 3 symbols in 1 slot are downlink symbols, the middle 9 symbols are flexible symbols, and the last 2 symbols are uplink symbols, and the SF index 45 may indicate that the first 6 symbols in 1 slot are downlink symbols, 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 resource indicated by the first user-level dynamic configuration information, as shown in fig. 5E, the first 3 symbols of the slot 2 corresponding to the reference subcarrier interval are downlink symbols, the middle 9 symbols are flexible symbols, the last 2 symbols are uplink symbols, the SF index 45 may indicate that the first 6 symbols of the slot 3 corresponding to the reference subcarrier interval are downlink symbols, the middle 2 symbols are flexible symbols, and the last 6 symbols are uplink symbols.

After the terminal 12 receives the user-level dynamic configuration information, it may determine the time domain resource allocation corresponding to the subcarrier spacing of BWP1 according to the user-level dynamic configuration information and the relationship between the subcarrier spacing of BWP1 and the reference subcarrier spacing.

For example, the terminal 12 may determine, according to the first user-level dynamic configuration information and/or the relationship between the subcarrier spacing of BWP1 and the reference subcarrier spacing, that slot 2 corresponding to the reference subcarrier spacing corresponds to slot 3 and slot 4 of BWP1 subcarrier spacing, and slot 3 corresponding to the reference subcarrier spacing corresponds to slot 5 and slot 6 of BWP1 subcarrier spacing, then as shown in fig. 5E, the first 6 symbols of slot 3 are downlink symbols, and the last 8 symbols of slot 3 are flexible symbols; the first 10 symbols of the time slot 4 are flexible symbols, and the last 4 symbols of the time slot 4 are uplink symbols; the first 12 symbols of the time slot 5 are downlink symbols, and the last 2 symbols of the time slot 5 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 is described below with reference to the specific communication mode of D2D, and the contents thereof can be combined with those in fig. 3 and fig. 4 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 convenience of description, the following description is given by taking mode 1 and mode 2 as an example, and those skilled in the art will understand that the following scheme is also applicable to other modes, such as mode 3 and mode 4. In the following, the terminal 12 is taken as the D2D sender, and the terminal 13 is taken as the D2D receiver.

Fig. 6 is a schematic diagram of another method for D2D communication using time domain resources in an NR system. Fig. 4 is introduced with reference to mode 1, in which the terminal 12 is a D2D sender, and the terminal 13 is a D2D receiver. When terminal 12 is located within the coverage area of access network device 11 and terminal 12 is in an RRC connected state with the access network device, access network device 11 may decide that terminal 12 uses 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 to S304 in fig. 3, and it is understood that in fig. 3, 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 are all the same, and the first time domain resource configuration information is first cell-level semi-static configuration information.

On the basis of fig. 3, fig. 6 may further include S602-S605, and in conjunction with the contents of fig. 3 to 4D, it is understood that the first user-level semi-static information, the second user-level semi-static configuration information, the third user-level semi-static configuration information, and the fourth user-level semi-static configuration information in fig. 3 to 4D may be the same, and the first user-level dynamic information, the second user-level dynamic configuration information, the third user-level dynamic configuration information, and the fourth user-level dynamic configuration information may be the same.

For example, as shown in fig. 5B, the first cell-level semi-static configuration information configures timeslot 1, timeslot 2, timeslot 3, timeslot 4, and timeslot 5 corresponding to the reference subcarrier spacing, i.e., timeslot 1, timeslot 2, timeslot 3, and timeslot 10 corresponding to the BWP1 subcarrier spacing.

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 spacing, i.e., time slot 5 and time slot 6 corresponding to the BWP1 subcarrier spacing.

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 time slot 2 and time slot 3 corresponding to the reference subcarrier spacing, i.e., time slot 3, time slot 4, time slot 5 and time slot 6 corresponding to the BWP1 subcarrier spacing.

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

In S601-S605, the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information may refer to the related contents in fig. 3 to fig. 5E, which are not described herein again.

Optionally, S601-S605 illustrate a situation that the access network device 11 performs configuration through the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information, and those skilled in the art can understand that the access network device 11 may perform configuration directly through the user-level dynamic configuration information, or the access network device 11 may perform configuration only through the cell-level semi-static configuration information and the user-level semi-static configuration information, or the access network device 11 may perform configuration only through the user-level semi-static configuration information, and the like. For example, for time domain resources corresponding to an uplink BWP and a downlink BWP of an unpaired spectrum, the time domain resources may be configured first through cell-level semi-static configuration information, and then configured through one or both of user-level semi-static configuration information and user-level dynamic configuration information; for the time domain resources corresponding to the uplink BWP and the downlink BWP of the paired spectrum, the configuration may be directly performed through the user-level dynamic configuration information.

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

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

Wherein the SA slot resource pool indication information may indicate one or more SA reservation slots including the SA target slot.

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

The following describes how the access network device 11 determines the SA reservation slots and how to determine the SA slot resource pool indication information, respectively.

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

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

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

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

For convenience of illustration, the embodiments of the present application are described in the above three types of SA time domain resources, and it can be understood by those skilled in the art that the type of the SA time domain resources may be other types, for example, the type of the SA time domain resources is an uplink timeslot, that is, the timeslot is used for SA communication only when all symbols in the timeslot are uplink symbols; alternatively, the type of SA time domain resource is a flexible slot, that is, a slot is used for SA transmission only if all symbols in the slot are flexible symbols. The content of the embodiment of the present application is also applicable to other types of time domain resources for transmitting SAs, and is not limited thereto.

(1) Access network device 11 determines SA reserved time slot

For example, processor 1111 of access network device 11 may determine the SA reservation slots.

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

Because the user-level semi-static configuration and the dynamic configuration are for the terminal, the cell-level semi-static configuration is for the cell, the user-level semi-static configuration and the dynamic configuration of different terminals may be different, and the cell-level semi-static configuration of the terminal in one cell may be the same, and the SA reserved time slot is determined by the access network device 11 according to the cell-level semi-static configuration information, the problem that the access network device 11 determines that the SA time slot resource pool is not applicable to other terminals according to the user-level semi-static configuration and the user-level dynamic configuration of a certain terminal can be avoided. As will be understood by those skilled in the art, the access network device 11 may determine the SA reservation time slot and broadcast SA time slot resource pool information in combination with the user-level semi-static configuration and the dynamic configuration, for example, determine the SA reservation time slot and broadcast SA time slot resource pool information in combination with the user-level semi-static configuration and the dynamic configuration of the transmitting end, which is not limited in the embodiment of the present application.

Optionally, when determining the SA reservation time slot, the access network device 11 may use a time slot corresponding to a reference subcarrier interval as a unit, where the reference subcarrier interval may be the same as or different from a reference subcarrier interval of the above cell-level semi-static configuration information, the user-level semi-static configuration information, or the user-level dynamic configuration information, and the following description will take an example that the reference subcarrier interval for determining the SA reservation time slot is the same as the reference subcarrier interval of the above cell-level semi-static configuration. It should be noted that, when determining the SA reservation time slot, the access network device 11 may use a time slot corresponding to a different reference subcarrier interval configured semi-statically or dynamically, for example, the subcarrier interval is a time slot corresponding to 30kHz, which 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 the broadcast message; or, sending the information to the terminal through other RRC signaling; alternatively, the access network device 11 may determine that the reference subcarrier interval of the SA reservation time slot predetermined by the terminal is the same as the reference subcarrier interval of the cell-level semi-static configuration, or the access network device 11 may determine that the reference subcarrier interval of the SA reservation time slot is a specific value, for example, 15kHz, or in another manner according to a default configuration of the terminal, which is not limited in this embodiment of the present application.

The SA reserved time slot is determined by the access network device 11 according to the time slot corresponding to the reference subcarrier interval, and then the SA slot resource pool indication information is broadcast, so that the received terminal can determine the SA reserved time slot corresponding to the BWP subcarrier interval according to the relationship between the reference subcarrier interval and the BWP subcarrier interval of the terminal, thereby avoiding the access network device issuing the SA reserved time slot corresponding to each BWP subcarrier interval, saving air interface resources, and reducing the burden of the access network device and the design complexity of the system 10.

The uplink symbol may be utilized for D2D communications using a first type of D2D time domain resource. After configuring uplink and downlink time domain resources at a cell level in a semi-static manner, the access network device 11 first determines a corresponding reference subcarrier interval, which time slots satisfy that at least one symbol is an uplink symbol, and then determines whether the uplink symbol is reserved for transmitting SA according to a scheduling condition, and when the uplink symbol is reserved for transmitting SA, the time slot to which the uplink symbol belongs is the reserved time slot of SA. Here, the scheduling case may include a scheduling case or a real-time load case of time domain resources of cellular traffic and D2D traffic, for example, when the demand of cellular traffic is large or the real-time load is heavy, more time domain resources may be allocated to cellular communication, for example, when the terminals supporting D2D in a cell are large or the real-time load of D2D traffic is heavy, more time domain resources may be allocated to D2D communication, and the access network device 11 may decide whether the uplink symbol is reserved for cellular communication or SA transmission or DATA (DATA) transmission according to the above scheduling case.

For example, referring to fig. 5B, the access network device 11 determines that corresponding to the reference subcarrier spacing, at least one symbol of the time slot 4 and the time slot 5 is an uplink symbol, the access network device 11 determines that the uplink symbol of the time slot 4 (i.e., the last 4 symbols of the time slot 4) is reserved for SA transmission according to the scheduling condition, the uplink symbol of the time slot 5 (i.e., all symbols of the time slot 5) is reserved for DATA transmission, and then the time slot 4 is a reserved time slot of the SA.

With the second SA time domain resource type, the SA transmission may be performed using flexible symbols. Similar to the above first SA time domain resource type, the access network device 11 may determine which time slots satisfy at least one symbol as a flexible symbol in the time domain resources configured by the first cell-level semi-static configuration information, corresponding to the interval of the reference subcarrier, and then determine whether the flexible symbol is reserved for transmitting the SA according to the scheduling condition, where when the flexible symbol is reserved for transmitting the 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 corresponding to the reference subcarrier spacing, slot 2, slot 3, and slot 4 satisfy that at least one symbol is a flexible symbol, the access network device 11 determines, according to the scheduling condition, that the flexible symbols of slot 2 (i.e., the last 11 symbols of slot 2), slot 3 (i.e., all symbols of slot 3), and slot 4 (i.e., the first 11 symbols of slot 4) are reserved for D2D communication, the flexible symbols of slot 2 (i.e., the last 11 symbols of slot 2), slot 3 (i.e., all symbols of slot 3) are reserved for transmitting DATA, the flexible symbols of slot 4 (i.e., the first 11 symbols of slot 4) are reserved for transmitting SA, and then slot 4 is a reserved slot of SA.

And adopting a third SA time domain resource type, and carrying out SA transmission by using the flexible symbol and the uplink symbol of the time slot. Similar to the above first SA time domain resource type and the second SA time domain resource type, the access network device 11 may determine which time slots satisfy that at least one symbol is an uplink symbol or a flexible symbol in the time domain resources configured by the first cell-level semi-static configuration information, corresponding to the interval of the reference subcarrier, and then determine whether the uplink symbol or the flexible symbol is reserved for transmitting the SA according to the scheduling condition, where when the uplink symbol or the flexible symbol is reserved for transmitting the SA, the time slot to which the uplink symbol or the flexible symbol belongs is the reserved time slot of the SA.

For example, referring to fig. 5B, if the access network is that the device 11 determines that the reference subcarrier spacing corresponds to, at least one symbol of the time slot 2, the time slot 3, the time slot 4, and the time slot 5 is an uplink symbol or a flexible symbol, and the access network device 11 determines that the uplink symbol and/or the flexible symbol of the time slot 4 (i.e., all symbols of the time slot 4) are reserved for SA transmission according to the scheduling condition, then the time slot 4 is a reserved time slot of the SA. Optionally, the access network device 11 determines that the uplink symbols and/or flexible symbols of slot 2 (i.e. the last 11 symbols of slot 2) and the uplink symbols and/or flexible symbols of slot 3 (i.e. all symbols of slot 3) and the uplink symbols and/or flexible symbols of slot 5 (i.e. all symbols of slot 5) are reserved for DATA transmission according to the scheduling condition.

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

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

The following description will take the third SA time domain resource type as an example, and those skilled in the art can also know that the following contents are also applicable when configuring resources for SA communication in the above other manners, which is not limited in the embodiments of the present application.

The SA slot resource pool indication information may indicate the SA reservation slot, e.g., by indicating an index of the SA reservation slot, e.g., the SA slot resource pool indication information may be a bitmap (bitmap) or bitmap indication information.

As a first implementation manner, the bitmap may indicate whether, in the time domain resources configured by the first cell-level semi-static configuration information, a time slot corresponding to the reference subcarrier spacing is a reserved time slot of the SA, for example, one bit in the bitmap indicates whether one time slot corresponding to the reference subcarrier spacing is a reserved time slot of the SA.

For example, in the time domain resource configured by the cell-level semi-static configuration information, with the third D2D time domain resource type, the time slots corresponding to the reference subcarrier intervals are time slot 1, time slot 2, time slot 3, time slot 4, and time slot 5, the bitmap may be 00010, bits of the bitmap respectively indicate whether time slot 1, time slot 2, time slot 3, time slot 4, and time slot 5 are reserved time slots of SA, where the 4 th bit is 1, which indicates that time slot 4 is a reserved time slot of SA; bit 1 is 0, which indicates that slot 1 is not a reserved slot of the SA; bit 2 is 0, indicating that slot 2 is not a reserved slot of the SA; bit 3 is 0, indicating that slot 3 is not a reserved slot for the SA; bit 5 is 0 indicating that slot 5 is not a reserved slot for the SA.

As a second implementation manner, a bitmap may indicate whether, in time domain resources configured by cell-level semi-static configuration information, a timeslot conforming to an SA time domain resource type corresponding to a reference subcarrier interval is a reserved timeslot of an SA, where one bit in the bitmap indicates whether one timeslot conforming to the SA time domain resource type corresponding to the reference subcarrier interval is a reserved timeslot of an SA, respectively.

For example, with the third SA time domain resource type, the timeslots conforming to the SA time domain resource type are timeslot 2, timeslot 3, timeslot 4, and timeslot 5. The bitmap may be 0010, bits of the bitmap respectively indicate whether a time slot 2, a time slot 3, a time slot 4, and a time slot 5 are reserved time slots of SA, where a 3 rd bit is 1, which indicates that the time slot 4 is a reserved time slot of SA; bit 1 is 0, indicating that slot 2 is not a reserved slot of the SA; bit 2 is 0, indicating that slot 3 is not a reserved slot for SA; bit 4 is 0 indicating that slot 5 is not a reserved 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 apparatus 11 transmits DCI0 to the terminal 12.

Access network device 11 assigns authorization to terminal 12 via DCI 0.

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

The ProSe BSR may be configured to indicate a group ID of a group (group) in which the terminal 12 is located, and a mapping relationship between the group ID and the group index.

S611: the access network apparatus 11 transmits DCI5 to the terminal 12, the DCI5 including Scheduling Assignment (SA) target slot indication information and DATA (DATA) target slot indication information.

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

Accordingly, the terminal 12 receives the DCI5 transmitted by the access network device 11, including the SA target slot indication information and the DATA target slot indication information. The terminal 12 may determine the SA target slot according to the SA target slot indication information, and the terminal 12 may determine the DATA target slot according to the DATA target slot indication information.

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

The DATA target slot indication information indicates one or more target slots of DATA, where a target slot of DATA may be understood as determining a slot for transmitting DATA. Optionally, when at least one symbol in a slot is determined for DATA transmission, the slot is the target slot.

The following is a description of how the access network device 11 determines the SA target slot, the DATA target slot, the SA target slot indication information, and the DATA target slot indication information.

Alternatively, when determining the SA target timeslot and the DATA target timeslot, the access network device 11 may determine the SA target timeslot and the DATA target timeslot by combining 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.

Optionally, when determining the SA target timeslot and the DATA target timeslot, the access network device 11 may use a timeslot corresponding to a reference subcarrier interval as a unit, where the reference subcarrier interval may be the same as or different from the reference subcarrier interval of the above cell-level semi-static configuration, the user-level semi-static configuration, or the dynamic configuration, and the following description will take an example that the reference subcarrier interval for determining the SA target timeslot and the DATA target timeslot is the same as the reference subcarrier interval of the above cell-level semi-static configuration. It should be noted that, when determining the SA target timeslot and the DATA target timeslot, the access network device 11 may use a timeslot corresponding to another reference subcarrier interval as a unit, for example, the subcarrier interval is a timeslot corresponding to 30kHz, which is not limited in this application. The access network device 11 may carry the reference subcarrier intervals that determine the SA target time slot and the DATA target time slot in the broadcast message; or, sending the information to the terminal through other RRC signaling; alternatively, the access network device 11 may determine that the reference subcarrier spacing of the SA target timeslot and the DATA target timeslot is the same as the reference subcarrier spacing of the cell-level semi-static configuration in advance, or the access network device 11 may determine that the reference subcarrier spacing of the SA target timeslot and the DATA target timeslot is a specific value, for example, 15kHz, or in another manner, which is not limited in this embodiment of the present application.

By the embodiment, the access network device can be prevented from issuing the SA target timeslot and the DATA target timeslot corresponding to each BWP subcarrier interval, air interface resources are saved, and the burden of the access network device and the design complexity of the system 10 are reduced.

Alternatively, the terminal 12 may configure multiple BWPs, and the access network device 11 may determine the SA target slot and the DATA target slot corresponding to each BWP subcarrier interval respectively in units of the subcarrier interval of the BWP, and then determine and transmit the SA target slot indication information and the DATA target slot indication information corresponding to each BWP subcarrier interval respectively.

By the embodiment, different time domain resources can be configured for different BWPs according to the scheduling conditions of the different BWPs, and the time domain resources can be more flexibly utilized.

(1) Access network equipment 11 determines SA target time slot

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

The access network device 11 may select an SA target slot in the reserved slots of the SAs, and reference may be made to the relevant contents of S606 for the reserved slots of the SAs, which will not be described herein again.

Optionally, since the access network device 11 determines the reserved time slot of the SA in S606 according to the information of the cell-level semi-static configuration, and the SA reserved time slot is later configured through the user-level semi-static configuration or through the dynamic configuration, here, the access network device 11 may select the SA target time slot according to the information of the user-level semi-static configuration or the dynamic configuration.

Alternatively, the access network device 11 may select the SA target timeslot according to a scheduling condition, where the scheduling condition may include a scheduling condition of time domain resources of cellular service and D2D service, or a real-time load condition, and so on.

For example, with the third SA time domain resource type, referring to fig. 5B, slot 4 is a reserved slot of the SA. The time slot 4 is not configured by the user-level semi-static configuration information or the user-level dynamic configuration information, the access network device 11 may determine, according to the scheduling condition, that the time slot 4 is a target time slot of the SA, and assuming that the time slot 4 is configured by the user-level semi-static configuration information or the user-level dynamic configuration information, the access network device 11 may determine, in combination with the user-level semi-static configuration information or the user-level dynamic configuration information, whether the time slot 4 conforms to a third SA time domain resource type, for example, whether the time slot 4 has an uplink symbol or a flexible symbol, or determine, according to the scheduling condition, whether the uplink symbol or the flexible symbol of the time slot 4 is determined.

(2) Access network equipment 11 determines 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, by indicating an index of the SA target slot.

For example, the SA target timeslot indication information may be a bitmap or indication information of a bitmap, where the bitmap may indicate whether a reserved timeslot of an SA corresponding to a reference subcarrier interval indicated by the SA timeslot resource pool indication information in S606 is an SA target timeslot, for example, a bit in the bitmap indicates whether a reserved timeslot of an SA is an SA target timeslot, for example, a third D2D time domain resource type is used, the access network device 11 in S606 is used to determine the first implementation manner or the second implementation manner of the SA timeslot resource pool indication information, the slot 4 is a reserved timeslot of an SA, the access network device 11 determines the slot 4 for transmitting the SA, the bitmap may be 1, the 1 st bit is 1, and the representation slot 4 is an SA target timeslot. Assuming that the SA slot resource pool indication information indicates reserved slots of SAs corresponding to 2 or more than 2 reference subcarrier intervals, the bitmap of the SA target slot indication information may include 2 or more than 2 bits, which respectively indicate whether 2 or more than 2 SA reserved slots are SA target slots.

(3) Access network device 11 determines DATA target time slot

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

Optionally, the access network device 11 may determine the DATA target timeslot in combination with 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 sent to the terminal 12 at the time of the DATA target timeslot.

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

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

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

third DATA time domain resource type: the uplink symbols and flexible symbols may be used for DATA communication. The slot may be used for DATA communication when all symbols of the slot are uplink symbols or flexible symbols, or the slot may include uplink symbols and/or flexible symbols and downlink symbols, and the uplink symbols and/or flexible symbols in the slot may be used for DATA communication. Here, the uplink symbol and/or the flexible symbol may be understood to include the following three cases: (1) an uplink symbol; (2) flexible symbols; (3) uplink symbols and flexible symbols.

For convenience of illustration, the embodiments of the present application are described in the above three DATA time domain resource types, and it will be understood by those skilled in the art that the DATA time domain resource types may be other types, for example, the DATA time domain resource type is an uplink timeslot, that is, the timeslot is used for DATA communication only when all symbols in the timeslot are uplink symbols; alternatively, the type of DATA time domain resource is a flexible slot, that is, a slot is used for DATA transmission only if all symbols in the slot are flexible symbols. The content of the embodiments of the present application is also applicable to other types of time domain resources for transmitting DATA, and is not limited thereto.

DATA transmission may be performed using uplink symbols using a first DATA time domain resource type. The access network device 11 may determine which timeslots satisfy at least one symbol as an uplink symbol in the time domain resources configured by 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, and then determine whether the uplink symbol is determined to be used for transmitting SA according to a scheduling condition, where when the uplink symbol is determined to be used for transmitting SA, a timeslot to which the uplink symbol belongs is a DATA target timeslot.

For example, referring to fig. 5B to 5E, the access network device 11 determines that at least one of the time slot 4 and the time slot 5 is an uplink symbol corresponding to the reference subcarrier interval, and the time slot 4 is an SA target time slot, and the access network device 11 may determine that the uplink symbol of the time slot 5 is determined to be used for transmitting DATA according to the scheduling condition, and then the time slot 5 is a DATA target time slot.

With a second DATA time domain resource type, DATA transmission may be made with flexible symbols. The access network device 11 may determine which timeslots satisfy at least one symbol as a flexible symbol in time domain resources configured by 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, and then determine whether the flexible symbol is determined to be used for transmitting an SA according to a scheduling condition, where when the flexible symbol is determined to be used for transmitting an SA, a timeslot to which the flexible symbol belongs is a DATA target timeslot.

For example, referring to fig. 5B to 5E, the access network device 11 determines that at least one symbol of the slot 2, the slot 3, and the slot 4 is a flexible symbol corresponding to the reference subcarrier interval, and the slot 4 is an SA target slot, and the access network device 11 may determine, according to the scheduling condition, that the flexible symbol of the slot 2 and the flexible symbol of the slot 3 are determined to be used for transmitting DATA, and then the slot 2 and the slot 3 are DATA target slots.

With a third DATA time domain resource type, DATA transmission may be performed using flexible symbols and uplink symbols. The access network device 11 may determine which timeslots satisfy at least one symbol as a flexible symbol or an uplink symbol in time domain resources configured by 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, corresponding to the reference subcarrier interval, and then determine whether the flexible symbol or the uplink symbol is determined to be used for transmitting DATA according to a scheduling condition, where when the flexible symbol or the uplink symbol is determined to be used for transmitting DATA, a timeslot to which the flexible symbol or the uplink symbol belongs is a DATA target timeslot.

For example, referring to fig. 5B to 5E, the time slot 2, the time slot 3, the time slot 4, and the time slot 5 satisfy that at least one symbol is a flexible symbol or an uplink symbol, the time slot 4 is an SA target time slot, the access network device 11 may determine the flexible symbol or the uplink symbol of the time slot 2, the time slot 3, and the time slot 5 for transmitting DATA according to the scheduling condition, and then the time slot 2, the time slot 3, and the time slot 5 are DATA target time slots.

Optionally, before S611, the access network device 11 may first determine the DATA reservation time slot, the access network device 11 may determine the DATA reservation time slot by referring to the access network device 11 to determine the relevant content of the SA reservation time slot, and then the access network device 11 may select the DATA target time slot in the DATA reservation time slot according to the scheduling condition.

For example, with the third DATA time domain resource type, the access network device 11 may determine that time slot 2, time slot 3, and time slot 5 are DATA reserved time slots, and the access network device 11 may determine that time slot 2, time slot 3, and time slot 5 are DATA target time slots according to a scheduling condition.

(4) Access network device 11 determines DATA target slot indication information

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

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

As a first implementation manner, the bitmap may indicate whether, in time domain resources configured by 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, a time slot corresponding to a reference subcarrier interval is a target time slot of DATA, for example, one bit in the bitmap indicates whether, respectively, a time slot corresponding to the reference subcarrier interval and conforming to a DATA time domain resource type is a target time slot of DATA, for example, a third DATA time domain resource type is adopted, where time slot 2, time slot 3, time slot 4, and time slot 5 are time slots conforming to the DATA time domain resource type, the access network device 11 determines that time slot 2, time slot 3, and time slot 5 are target time slots of DATA, the bitmap may be 1101, and 1 st bit being 1 represents that time slot 2 is a DATA target time slot; bit 2 is 1, representing that slot 3 is the DATA target slot; bit 3 is 0, indicating that slot 4 is not a DATA target slot; bit 4 is a 1 indicating that slot 5 is the DATA target slot.

As a second embodiment, optionally, before S409, the access network device 11 may broadcast DATA slot resource pool indication information, where the DATA slot resource pool indication information indicates a DATA reserved slot, and refer to the related content of the SA slot resource pool indication information broadcast by the access network device 11 in S401. The bitmap may indicate whether the DATA reserved time slot corresponding to the reference subcarrier interval is a DATA target time slot, for example, with a third DATA time domain resource type, the access network device 11 may broadcast the DATA reserved time slot in time slot 2, time slot 3, and time slot 5, where the bitmap may be 111, bit 1 represents that time slot 2 is a target time slot of DATA; bit 2 is 1, indicating that slot 3 is the target slot for DATA; bit 3 is a 1 indicating that slot 5 is the destination slot for the DATA.

The above describes that the SA target slot, the DATA target slot, the SA target slot indication information, and the DATA target slot indication information corresponding to the reference subcarrier interval are determined and transmitted to the terminal 12. When the terminal 12 configures a plurality of BWPs, the SA target slot indication information and the DATA target slot indication information of each BWP may be determined by the correspondence between each BWP subcarrier interval and the reference subcarrier interval, and configured in units of BWPs with respect to the access network device 11, which may save system complexity and wireless communication resources between the access network device 11 and the terminal 12.

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

The terminal 12 may determine the available symbols of the SA target 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. One embodiment is illustrated below.

First, the terminal 12 may obtain 1 or more SA target slots corresponding to the BWP1 subcarrier spacing according to the relationship between the received SA target slot indication information and the subcarrier spacing of BWP1 and the reference subcarrier spacing.

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

Second, for each SA target slot corresponding to a BWP1 subcarrier spacing, the terminal 12 may determine available symbols for the SA target slot corresponding to a BWP1 subcarrier spacing in conjunction with 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.

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

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

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

The following description will take one SA target slot and determine the available symbols of the SA target slot as an example.

As a first embodiment, fig. 7A is a schematic diagram of a method for determining available symbols of an SA target timeslot, as shown in fig. 7A, the terminal 12 may first determine whether the SA target timeslot is configured by the first user-level dynamic configuration information, and if the SA target timeslot is configured by the first user-level dynamic configuration information, the terminal 12 determines available symbols of the SA target timeslot by combining the first user-level dynamic configuration information; if the SA target time slot is not configured through the first user-level dynamic configuration information, the terminal 12 judges whether the SA target time slot is configured through the first user-level semi-static configuration information or not, and if the SA target time slot is configured through the first user-level semi-static configuration information, the terminal 12 determines an available symbol of the SA target time slot by combining the first user-level semi-static configuration information; if the SA target timeslot is not configured by the first user-level semi-static configuration, the terminal 12 determines available symbols of the SA target timeslot by combining the information of the first cell-level semi-static configuration.

For example, with the third SA time domain resource type, the SA target timeslot corresponding to the reference subcarrier spacing is timeslot 4, and the SA target timeslot corresponding to the BWP1 subcarrier spacing is timeslot 7 and timeslot 8, the terminal 12 determines whether the timeslot 7 is configured by the first dynamic configuration information, because the timeslot 7 is not configured by the first dynamic configuration information, the terminal 12 determines whether the timeslot 7 is configured by the first user-level semi-static configuration information, because the timeslot 7 is not configured by the first user-level semi-static configuration information, and the terminal 12 determines the available symbol of the timeslot 7 by combining the first cell-level semi-static configuration information. Likewise, the timeslot 8 is not configured by the first dynamic configuration information and is not configured by the first user-level semi-static configuration information, and the terminal 12 determines available symbols of the timeslot 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 the slot 7 are flexible symbols, the first 6 symbols of the slot 8 are flexible symbols, and the last 8 symbols of the slot 8 are uplink symbols. If the third D2D time domain resource type is used, the available symbols of slot 7 include all the symbols of slot 7, and the available symbols of slot 8 include all the symbols of slot 8.

As a second embodiment, fig. 7B is a diagram illustrating 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 last SA target timeslot, and determine the available symbols of the SA target timeslot by combining the last time domain resource configuration information. For example, if the time domain resource configuration information of the last configured SA target timeslot is the first cell-level semi-static configuration, determining an available symbol of the SA target timeslot in combination with the first cell-level semi-static configuration information; if the time domain resource configuration information of the SA target time slot configured for the last time is the first user-level semi-static configuration, determining an available symbol of the SA target time slot by combining the first user-level semi-static configuration information; and if the time domain resource configuration information of the SA target time slot which is configured for the last time is the first user-level dynamic configuration information, determining an available symbol of the SA target time slot by combining the first user-level dynamic configuration information.

For example, with the third SA time domain resource type, the SA target timeslot corresponding to the reference subcarrier spacing is timeslot 4, the SA target timeslot corresponding to the BWP1 subcarrier spacing is timeslot 7 and timeslot 8, the time domain resource configuration information configuring timeslot 7 and timeslot 8 for the last time is the first cell-level semi-static configuration information, and the terminal 12 determines the available symbol of timeslot 7 and the available symbol of timeslot 8 by combining the first cell-level semi-static configuration information. For example, according to the first cell-level semi-static configuration information, all symbols of the slot 7 are flexible symbols, the first 6 symbols of the slot 8 are flexible symbols, and the last 8 symbols of the slot 8 are uplink symbols. If the third D2D time domain resource type is used, the available symbols of slot 7 include all the symbols of slot 7, and the available symbols of slot 8 include all the symbols of slot 8.

As a third embodiment, fig. 7C is a schematic diagram of another method for determining available symbols of an SA target timeslot, as shown in fig. 7C, first determining whether a flexible symbol exists in an SA target timeslot configured by first cell-level semi-static configuration information, and if the flexible symbol does not exist, determining an uplink symbol and a downlink symbol of the SA target timeslot according to the first cell-level semi-static configuration information; if the flexible symbol exists, judging whether first user-level semi-static configuration information or first user-level dynamic configuration information configures the flexible symbol or not for each flexible symbol, and if the first user-level semi-static configuration information or the first user-level dynamic configuration information configures the flexible symbol, determining the flexible symbol to be an uplink symbol or a downlink symbol by combining the first user-level semi-static configuration information or the first user-level dynamic configuration information; if the flexible symbol is not configured by the first user-level semi-static configuration information or the first user-level dynamic configuration information, determining the flexible symbol as a flexible symbol; the terminal 12 finally determines the available symbols of the SA target slot.

For example, with the third SA time domain resource type, the SA target slot corresponding to the reference subcarrier spacing is slot 4, and the SA target slots corresponding to the BWP1 subcarrier spacing are slot 7 and slot 8. For the time slot 7, a flexible symbol exists in the time slot 7 configured by the first cell-level semi-static configuration information, and for each flexible symbol in the time slot 7, neither the first user-level semi-static configuration information nor the first user-level dynamic configuration information configures the flexible symbol, so that the flexible symbol in the time slot 7 is determined to be a flexible symbol, and the time slot 7 is determined to have no uplink symbol or downlink symbol by combining the first cell-level semi-static configuration information, so that all symbols of the time slot 7 are flexible symbols; for the timeslot 8, a flexible symbol exists in the timeslot 8 configured by the first cell-level semi-static configuration information, and for each flexible symbol in the timeslot 8, neither the first user-level semi-static configuration information nor the first user-level dynamic configuration information configures the flexible symbol, so that the flexible symbol in the timeslot 8 is determined to be a flexible symbol, and the last 8 symbols of the timeslot 8 are determined to be uplink symbols in combination with the first cell-level semi-static configuration information, so that the first 6 symbols of the timeslot 8 are flexible symbols, and the last 8 symbols are uplink symbols. If the third D2D time domain resource type is used, the available symbols of slot 7 include all the symbols of slot 7, and the available symbols of slot 8 include all the symbols of slot 8.

As a fourth embodiment, fig. 7D is a schematic diagram of another method for determining available symbols of an SA target timeslot, as shown in fig. 7D, first determining whether flexible time domain resources exist in an SA target timeslot configured by first cell-level semi-static configuration information, and if flexible time domain resources are not configured in the first cell semi-static configuration, determining available symbols of the SA target timeslot by combining with a first cell semi-static configuration result; if the first cell-level semi-static configuration information configures flexible time domain resources, determining at least one flexible symbol of the flexible time domain resources configured for the first cell-level semi-static, whether a user-level semi-static is configured as a flexible symbol, if not (indicating that the user-level semi-static configuration configures the flexible time domain resources configured for the cell-level semi-static to be 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), determining available symbols of the SA target time slot by combining the first cell-level semi-static configuration information and the first user-level semi-static configuration information, if so (indicating that the first user-level semi-static configuration configures at least one flexible symbol of the flexible time domain resources configured for the first cell-level semi-static to be flexible symbols still), determining at least one symbol of the flexible time domain resources configured for the first user-level semi-static, the first dynamic configuration information is configured to be an uplink symbol or a downlink symbol, if not (it is stated that the flexible time domain resource configured by the first dynamic configuration system information to the first user-level configuration information is still configured to be a flexible time domain resource), if so (it is stated that the first dynamic configuration information configures at least one flexible symbol in the flexible time domain resource configured by the first user-level configuration information to be an uplink symbol or a downlink symbol), the available symbol of the SA target timeslot is determined in combination with the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information.

S613: the terminal 12 determines the available symbols for 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 for the DATA target slot based on 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. One embodiment is illustrated below.

First, the terminal 12 acquires 1 or more DATA target slots corresponding to the BWP subcarrier spacing according to the relationship between the received DATA target slot indication information and the subcarrier spacing of BWP1 and the reference subcarrier spacing.

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

Second, for each DATA target slot corresponding to a BWP1 subcarrier spacing, the terminal 12 may determine available symbols for the DATA target slot corresponding to a BWP1 subcarrier spacing in conjunction with 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.

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

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

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

The following description is given by taking a DATA target slot, and determining the available symbols for the DATA target slot as an example.

As a first implementation manner, it may be determined whether the DATA target time slots are configured by the first user-level dynamic configuration information, and if the DATA target time slots are configured by the first user-level dynamic configuration information, the terminal 12 determines available symbols of the DATA target time slots by combining the first user-level dynamic configuration information; if the DATA is not configured through the first user-level dynamic configuration information, the terminal 12 determines whether the DATA target time slot is configured through the first user-level semi-static configuration information, and if the DATA target time slot is configured through the first user-level semi-static configuration information, the terminal 12 determines an available symbol of the DATA target time slot by combining the first user-level semi-static configuration information; if not configured semi-statically at the first user level, the terminal 12 determines the available symbols of the DATA target slot in combination with the information of the semi-static configuration at the first cell level, with reference to the relevant contents in fig. 7A, except that the available symbols of the DATA target slot are determined here, and the available symbols of the SA target slot are determined in fig. 7A.

For example, with the third DATA time domain resource type, the DATA target slots corresponding to BWP1 subcarrier spacing are slot 3, slot 4, slot 5, slot 6, slot 9, and slot 10. The time slot 3, the time slot 4, the time slot 5 and the time slot 6 are configured through the first user-level dynamic configuration information, the first 6 symbols of the time slot 3 are downlink symbols, the last 8 symbols of the time slot 3 are flexible symbols, the first 10 symbols of the time slot 4 are flexible symbols, the last 4 symbols of the time slot 4 are uplink symbols, the first 12 symbols of the time slot 5 are downlink symbols, and the last 2 symbols of the time slot 5 are flexible symbols; the first 2 symbols of slot 6 are flexible symbols and the last 12 symbols are uplink symbols. The time slot 9 and the time slot 10 are not configured through the first user-level dynamic configuration information and the first user-level semi-static information, and according to the first cell-level semi-static configuration information, all symbols of the time slot 9 are uplink symbols, and all symbols of the time slot 10 are uplink symbols. With the third D2D time domain resource type, 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 the last 2 symbols of slot 5, the available symbols of slot 6 include all the symbols of slot 6, the available symbols of slot 9 include all the symbols of slot 9, and the available symbols of slot 10 include all the symbols of slot 10.

As a second embodiment, the time domain resource allocation information of the last DATA target slot may be determined. Reference may be made to fig. 7B for the relevant context, except that here the available symbols for the DATA target slot are determined, and fig. 7B for the available symbols for the SA target slot.

As a third implementation manner, it may be determined whether the first cell-level semi-static configuration information configures a flexible time domain resource, and then, the symbol in the flexible time domain resource is determined to be an uplink symbol, a flexible symbol, or a downlink symbol by combining the first user-level semi-static configuration information or the first user-level dynamic configuration information. Reference may be made to fig. 7C for the relevant context, except 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 available symbols of the SA target slot.

S614 may occur after S606, without limitation to the order of each step in S607-S613, e.g., S614 may precede S608.

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

Alternatively, the terminal 13 does not know which of the one or more SA reservation slots are SA target slots. The terminal 13 may determine each SA reserved slot as an SA target slot, and determine available symbols of each SA target slot respectively.

The terminal 12 may determine the available symbols of the SA target 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. The relevant content can refer to the available symbols of the SA target slot determined by the terminal 12 in S612.

S615: the terminal 12 transmits the SA to the terminal 13 on available symbols of the SA target slot.

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

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

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

Optionally, the SA may further include available symbol indication information of the DATA target slot, which 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 spacing are slot 2, slot 3, and slot 5. The available symbol indication information of the DATA target slot indicates that the available symbol of the DATA target slot corresponding to the reference subcarrier spacing is 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 symbol of the SA target slot, and the terminal 13 can acquire DATA target slot indication information in the SA.

Alternatively, after the terminal 13 may synchronize with the terminal 12 through S607, the SA is detected on available symbols of the SA target slot.

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

After the terminal 12 transmits the SA on the available symbol of the SA target slot, the terminal 13 accordingly receives the SA on the available symbol of the SA target slot, and the terminal 13 can acquire 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 embodiment of the terminal 13 side of S614-S615:

after the terminal 13 receives the SA slot resource pool indication information through S606, the terminal 13 may learn the SA reserved slot according to the SA slot resource pool indication information, and detect SAs on all symbols of the SA reserved slot. For example, the terminal 13 may determine the SA reservation slots corresponding to the BWP subcarrier intervals according to the relationship between the reference subcarrier intervals and the BWP subcarrier intervals, where the SA reservation slots corresponding to the BWP subcarrier intervals may be 1 or more, and then detect SAs on all symbols of the SA reservation slots corresponding to the BWP subcarrier intervals.

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

With this first embodiment, the terminal 13 can directly detect SAs on all symbols of the SA reservation slot without distinguishing which symbols of the SA reservation slot to detect SAs on, which reduces the design complexity and burden of the terminal 13.

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

The terminal 13 may determine the DATA target slot based on the DATA target slot indication information after receiving the DATA target slot indication information through S615.

The terminal 13 may determine the available symbols for the DATA target slot based on 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. The relevant contents may refer to the relevant contents of the available symbols of the DATA target slot determined by the terminal 12 in S613.

Optionally, when the SA also carries the available symbol indication information of the DATA target timeslot, the terminal 13 may further obtain the available symbol indication information of the DATA target timeslot, and the terminal 13 may directly obtain the available symbol of the DATA target timeslot according to the available symbol indication information of the DATA target timeslot.

For example, the DATA target slot indication information indicates that the DATA target slots corresponding to the reference subcarrier spacing are slot 2, slot 3, and slot 5. The available symbol indication information of the DATA target slot indicates that the available symbol of the DATA target slot corresponding to the reference subcarrier spacing is the last 11 symbols of slot 2, the last 8 symbols of slot 3, and all symbols of slot 5. The terminal 13 may determine 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 and all symbols of slot 10 corresponding to the BWP1 subcarrier spacing according to the relationship between the reference subcarrier spacing and the BWP subcarrier spacing,

through the implementation, the terminal 13 can be prevented from determining the available symbols of the DATA target time slot according to the time domain resource configuration information of the terminal 13, the operation of the terminal 13 is simplified, and the terminal 12 can determine which symbols are the available symbols of the DATA target time slot according to the real-time uplink and downlink scheduling conditions of the terminal 12, directly indicate the terminal 13, and improve the flexibility.

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

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

For example, if a third DATA time domain resource type is used, the available symbols of the DATA target slot include 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, and all symbols of slot 10, and the terminal 12 transmits DATA on 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, and all symbols of slot 10.

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

For example, terminal 13 receives DATA at BWP1 subcarrier spacing for 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, and all symbols of slot 10.

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

as a first embodiment, the terminal 13 knows the DATA target slot according to the DATA target slot indication information, and detects DATA on the DATA target slot. For example, the terminal 13 determines a DATA target slot corresponding to the BWP subcarrier interval, which may be 1 or more, according to the relationship between the reference subcarrier interval and the BWP subcarrier interval, and then detects DATA on the DATA target slot corresponding to the BWP subcarrier interval.

For example, the DATA target slot indication information indicates that the DATA target slots corresponding to the reference subcarrier spacing are slot 2, slot 3, and slot 5, the reference subcarrier spacing is 15kHz, and the BWP1 subcarrier spacing is 30kHz, then the DATA target slots corresponding to the BWP1 subcarrier spacing are slot 3, slot 4, slot 5, slot 6, slot 9, and slot 10, and the terminal 13 detects DATA on slot 3, slot 4, slot 5, slot 6, slot 9, and slot 10.

Several embodiments of mode 2 are described below.

The mode 2 may specifically include an out of coverage (OOC) mode and an edge of coverage (EOC) mode. When the terminal 12 is out of coverage of the access network device 11, the terminal 12 may use the OOC mode for D2D communication. When terminal 12 is located within the coverage of access network device 11 or at the edge of the coverage of access network device 11, terminal 12 may use the EOC mode, for example, terminal 12 and access network device 11 are in an RRC idle state, and terminal 12 may use the EOC mode for D2D communication; alternatively, terminal 12 may be in an RRC connected state with access network device 11, and access network device 11 may decide that terminal 12 uses EOC mode for D2D communication.

Fig. 8 is a schematic diagram of another method for D2D communication using time domain resources in an NR system, which may adopt EOC mode of mode 2. As shown in fig. 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 are not described herein again.

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

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

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

S806 may refer to the content in S606, and is not described herein again.

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

For example, the processor 1111 of the access network device 11 may broadcast the DATA 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.

Wherein the DATA slot resource pool indication information indicates one or more reserved slots of DATA, which may include a DATA target slot.

The reserved time slot of DATA may be understood herein as a time slot reserved for transmitting DATA, which may be understood as transmitting or receiving, e.g., terminal 12 is the D2D sender, and for terminal 12, the reserved time slot of DATA may be understood as a time slot reserved for transmitting SA; the terminal 13 is the D2D receiver, and for the terminal 13, the reserved time slot of DATA may be understood as the time slot reserved for receiving DATA. Alternatively, when at least one symbol in a slot is reserved for transmitting DATA, it may be understood that the slot is reserved for transmitting DATA, the slot being a DATA reservation slot.

The principle and manner of how the access network device 11 determines the DATA reservation slot and how the DATA slot resource pool indication information is determined are similar to how the SA reservation slot is determined and how the SA slot resource pool indication information is determined, except that the former is used for transmitting DATA and the latter is used for transmitting SA, which can refer to the relevant contents in S606.

For example, if the third DATA time domain resource type is adopted, the access network is that the device 11 determines that at least one symbol corresponding to the reference subcarrier interval is an uplink symbol or a flexible symbol, and the access network device 11 determines that the uplink symbol and/or the flexible symbol of the slot 2 (i.e., the last 11 symbols of the slot 2) and the uplink symbol of the slot 3 (i.e., all symbols of the slot 3) and the uplink symbol and/or the flexible symbol of the slot 5 (i.e., all symbols of the slot 5) are reserved for DATA transmission according to the scheduling condition, then the slot 2, the slot 3, and the slot 5 are reserved slots for DATA transmission.

For example, the DATA slot resource pool indication information may be a bitmap or 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 the reserved time slot of DATA, for example, if a third D2D time domain resource type is adopted, the time slots corresponding to the D2D communication resource type are time slot 2, time slot 3, time slot 4 and time slot 5, the bitmap may be 1101, the 1 st bit is 1, which indicates that time slot 2 is the reserved time slot of DATA; bit 2 is 1, indicating that slot 3 is a reserved slot for DATA; bit 4 is 1, indicating that slot 5 is a reserved slot for DATA; bit 3 is a0 indicating that slot 4 is not a DATA reserved 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 slot from the SA slot resource pool.

In mode 1, the access network device 11 sends the SA target timeslot and the DATA target timeslot to the terminal 12 through the DCI5, in the EOC, the terminal 12 selects the SA target timeslot from the master-slave SA timeslot resource pool, and the terminal 12 selects the DATA target timeslot from the master-slave DATA timeslot resource pool.

The terminal 12 selects an SA target timeslot from the SA timeslot resource pool, and may refer to the relevant content of the access network device 11 selecting an SA target timeslot from the SA timeslot resource pool in S611, where the difference is that the former is selected by the terminal 12, and the latter is selected by the access network device 11; the former may be in units of slots corresponding to BWP subcarrier intervals when selecting an SA target slot, and the latter may be in units of slots corresponding to reference subcarrier intervals when selecting an SA target slot.

For example, with the third SA time domain resource type, the time slot 4 corresponding to the reference subcarrier interval is the reserved time slot of the SA, and according to the relationship between the reference subcarrier interval and the BWP subcarrier interval, it can be known that the time slot 7 and the time slot 8 corresponding to the BWP subcarrier interval are reserved time slots of the SA, and the terminal 12 can determine that the time slot 7 and the time slot 8 are the target time slots of the SA according to the time domain resource configuration information of the time slot 7 and the time slot 8 and the scheduling condition of the terminal 12.

S810: the terminal 12 selects a DATA target slot from the pool of DATA slot resources.

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

The terminal 12 selects a DATA target timeslot from the DATA timeslot resource pool, which is similar to the principle and manner of selecting an SA target timeslot from the SA timeslot resource pool by the access network device 11 in S611, except that the former is selected by the terminal 12, and the latter is selected by the access network device 11; the former selects DATA target time slot, the latter selects SA target time slot; the former may refer to the slot corresponding to the BWP subcarrier interval as a unit when selecting the SA target slot, and the latter may refer to the relevant contents in S406 by referring to the slot corresponding to the subcarrier interval as a unit when selecting the DATA target slot.

For example, with the third DATA time domain resource type, the time slot 2, the time slot 3, and the time slot 5 corresponding to the reference subcarrier interval are DATA reserved time slots, and the terminal 13 may determine, according to the relationship between the BWP reference subcarrier interval and the reference subcarrier interval, 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 corresponding to the BWP subcarrier interval as reserved time slots. The terminal 13 determines that 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 are the SA target time slot 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 condition of the terminal 12.

S811 the terminal 12 determines available symbols for the SA target slot.

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

S813: the terminal 13 determines available symbols of the SA target slot.

S814: the terminal 12 transmits the SA on the available symbols of the SA target slot.

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

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

Wherein, S811-S816 can refer to the contents of S612-S617 in fig. 4, and are not described herein again. .

Fig. 9 is a schematic diagram of another method for D2D communication using time domain resources in an NR system, which may employ the OOC mode of mode 2. When terminals 12 and 13 are located outside the coverage area of access network device 11, terminals 12 and 13 may communicate using OOC mode for D2D. As shown in fig. 9:

it should be noted that the terminal 12 and the terminal 13 may be located outside the coverage of the access network device 11, for example, the terminal 12 and the terminal 13 may move from within the coverage of the access network device 11 to outside the coverage of the access network device 11, the terminal 12 and the 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 the terminal 12 and the terminal 13 may store the first cell-level semi-static configuration information, the first user-level semi-static configuration information, and the first user-level dynamic configuration information, which may specifically refer to the contents in S601-S605, and are not described herein again. Or, the terminal 12 and the terminal 13 may be located outside the coverage of the access network device 11, but may be located in the coverage of other access network devices, and at this time, the terminal 12 and the terminal 13 may receive the cell-level semi-static configuration information, the user-level semi-static configuration information, and the user-level dynamic configuration information sent by other access network devices, which may specifically refer to the contents in this embodiment and is not described herein again.

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

Terminal 12 and terminal 13 are located outside the coverage area of access network device 11, and terminal 12 and terminal 13 do not receive the broadcast message of access network device 11.

Optionally, the SA time slot resource pool indication information preconfigured by the terminal 12 and the terminal 13 may include that when the terminal 12 and the terminal 13 are located in the coverage of the access network device 11 recently, the SA time slot resource pool indication information broadcasted by the access network device 11 is received, and the terminal 12 and the terminal 13 store the SA time slot resource pool indication information. For example, the processor 1211 of the terminal 12 may receive the SA timeslot 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 timeslot resource pool indication information; the processor 1211 of the terminal 13 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 13 stores the SA slot resource pool indication information.

Alternatively, the pre-configuring of the SA slot resource pool indication information by the terminal 12 and the terminal 13 may include writing the SA slot resource pool indication information into the terminal 12 and the terminal 13 in a static manner in advance, for example, writing the SA slot resource pool indication information into the processor 1211 or the memory 1213 of the terminal 12 in the static manner, and writing the SA slot resource pool indication information into the processor 1211 or the memory 1213 of the terminal 13 in the static manner.

For the content of the SA slot resource pool indication, reference may be made to the related content of S606, which is not described herein again.

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

Optionally, the terminal 12 and the terminal 13 pre-configure the DATA slot resource pool indication information, which may include that the terminal 12 and the terminal 13 receive the DATA slot resource pool indication information broadcast by the access network device 11 when being located in the coverage of the access network device 11 recently, and the terminal 12 and the terminal 13 store the DATA slot resource pool indication information. For example, the processor 1211 of the terminal 12 may receive the DATA 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 slot resource pool indication information; the processor 1211 of the terminal 13 may receive the DATA slot resource pool indication information from the access network device 11 through the antenna 1216, and the memory 1213 of the terminal 13 stores the DATA slot resource pool indication information.

Alternatively, the pre-configuring of the DATA slot resource pool indication information by the terminal 12 and the terminal 13 may include writing the DATA slot resource pool indication information into the terminal 12 and the terminal 13 in a static manner in advance, for example, writing the DATA slot resource pool indication information into the processor 1211 or the memory 1213 of the terminal 12 in the static manner, and writing the DATA slot resource pool indication information into the processor 1211 or the memory 1213 of the terminal 13 in the static manner.

The content of the DATA slot resource pool indication may refer to the related content of S807, and will not be described herein again.

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 the pool of DATA slot resources.

Available symbols of the SA target slot are determined S906.

And S907 determines available symbols for the DATA target slot.

S908: the terminal 13 determines available symbols of the SA target slot.

S909: the terminal 12 transmits the SA on the available symbols of the SA target slot.

S910: the terminal 13 determines the available symbols of the DATA target slot.

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

S904-S911 can refer to the contents of S809-S816 in FIG. 4, which are not described herein again.

The method of the embodiment of the present application is described above with reference to fig. 3 to 9, and a communication apparatus provided in the embodiment of the present application for performing the method is described below. Those skilled in the art will appreciate that the methods and apparatus may be combined and referenced with one another and that the apparatus provided by the embodiments of the present application may perform the methods described above.

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 perform through the structure shown in fig. 2A, where actions sent or received by the access network device 11 may be performed by the processor 1111 of the access network device 11 through the antenna 1115, and actions determined or processed by the access network device 11 may be performed by the processor 1111 of the access network device 11. For example, processor 1111 of access network device 11 may transmit time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, to terminal 12 or terminal 13 through antenna 1115. For example, the processor 1111 of the access network device 11 may determine the SA slot resource pool indication information and the DATA slot resource pool indication information, and the processor 1111 of the access network device 11 may broadcast the SA slot resource pool indication information and the DATA slot resource pool indication information through the antenna 1115. For example, the processor 1111 of the access network device 11 may determine SA target slot indication information and DATA target slot indication information, and the processor 1111 of the access network device 11 may transmit the SA target slot indication information and the DATA target slot indication information to the terminal 12 through the antenna 1115.

For example, in the method executed by the terminal 12 in the embodiment of the present application, the terminal 12 may execute the configuration shown in fig. 2B, where the actions of transmitting or receiving by the terminal 12 may be performed by the processor 1211 of the terminal 12 through the antenna 1216, and the actions of determining or processing by the terminal 12 may be performed by the processor 1211 of the terminal 12. For example, processor 1211 of terminal 12 may receive time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, from access network equipment 11 via antenna 1216. For example, processor 1211 of terminal 12 may receive SA slot resource pool indication information and DATA slot resource pool indication information from access network equipment 11 via 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 apparatus 11 through the antenna 1216. For example, the processor 1211 of the terminal 12 may determine available symbols for the SA target slot, e.g., the processor 1211 of the terminal 12 determines available symbols for the SA target slot in conjunction with 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. For example, the processor 1211 of the terminal 12 may determine available symbols for the DATA target time slot, e.g., the processor 1211 of the terminal 12 determines available symbols for the DATA target time slot in conjunction with 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. For example, the processor 1211 of the terminal 12 may transmit the SA to the terminal 13 through the antenna 1216 available symbols in the SA target time slot, and the processor 1211 of the terminal 12 may transmit the DATA to the terminal 13 through the antenna 1216 available symbols in the DATA target time slot.

For example, in the method executed by the terminal 13 in the embodiment of the present application, the terminal 13 may be executed by the structure shown in fig. 2B, wherein the actions of transmitting or receiving by the terminal 13 may be performed by the processor 1211 of the terminal 13 through the antenna 1216, and the actions of determining or processing by the terminal 13 may be performed by the processor 1211 of the terminal 13. For example, processor 1211 of terminal 13 may receive time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, from access network equipment 11 via antenna 1216. For example, the processor 1211 of the terminal 13 may receive the SA slot resource pool indication information and the DATA slot resource pool indication information from the access network apparatus 11 through the antenna 1216. For example, the processor 1211 of the terminal 13 may determine available symbols of the SA target slot, e.g., the processor 1211 of the terminal 13 determines available symbols of the SA target slot in combination with 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. For example, the processor 1211 of the terminal 13 may determine the available symbols of the DATA target slot, e.g., the processor 1211 of the terminal 13 determines the available symbols of the DATA target slot in combination with 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, or the processor 1211 of the terminal 13 determines the available symbols of the DATA target slot in combination with the available symbol indication information of the DATA target slot carried in the SA. For example, processor 1211 of terminal 13 may receive the SA from terminal 12 via antenna 1216 on the available symbols of the SA target time slot, and processor 1211 of terminal 13 may receive the DATA from terminal 12 via antenna 1216 on the available symbols of the DATA target time slot.

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

A communication apparatus 1000 according to an embodiment of the present application will be described below. As shown in fig. 10:

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

The communication unit 1002 may be a device having a transceiving function for communicating with other network apparatuses or a communication network.

The storage unit 1002 may include one or more memories, which may be devices in one or more devices or circuits for storing programs or data.

The storage unit 1002 may be independent and connected to the processing unit 1001 through a communication bus. The memory unit may also be integrated with the processing unit 1001.

The communication apparatus 1000 may be used in a communication device, circuit, hardware component, or 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. A schematic diagram of a terminal may be as shown in fig. 2B. Optionally, the communication unit 1003 of the apparatus 1000 may include an antenna and a transceiver of a terminal, such as the antenna 1216 and the transceiver 1212 in fig. 2B. Optionally, the communication unit 1003 may also 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 embodiment of the present application, for example, a chip in the terminal 12 or a chip in the terminal 13. The communication unit 1003 may be an input or output interface, pin, circuit, or the like. Alternatively, the storage unit may store computer-executable instructions of the method on the terminal side to cause the processing unit 1001 to execute the method of the terminal 12 or the terminal 13 in the above-described embodiment. The storage unit 1002 may be a register, a cache, a RAM, or the like, and 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 may store static information and instructions, and the storage unit 1002 may be separate from the processing unit 1001. Alternatively, as wireless communication technology advances, a transceiver may be integrated with the communication device 1000, such as the communication unit 1003 integrated with the transceiver 1212.

When the communication apparatus 1000 is a terminal or a chip in a terminal in the embodiment of the present application, the communication apparatus 1000 may implement the method performed by the terminal 12 in the above-described embodiment. For example, the communication unit 1003 may receive time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, from the access network device 11, which may refer to the relevant contents of S301-S302. For example, the communication unit 1003 may receive SA slot resource pool indication information and DATA slot resource pool indication information from the access network apparatus 11, and may refer to the relevant contents of S305 to 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 apparatus 11, and may refer to the relevant contents of S307. For example, the processing unit 1001 may determine available symbols of the SA target slot, e.g., the processing unit 1001 may determine available symbols of the SA target slot in combination with 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, which may refer to relevant contents of S309, S4a02, S4B03, S4C03, and S4D 02. For example, the processing unit 1001 may determine available symbols for the DATA target slot, e.g., the processing unit 1001 may determine available symbols for the DATA target slot in conjunction with 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, which may refer to relevant contents of S310. For example, the communication unit 1003 may transmit the SA to the terminal 13 at the available symbol of the SA target slot, and may refer to the relevant content of S312, and the communication unit 1003 may transmit the DATA to the terminal 13 at the available symbol of the DATA target slot, and may refer to the relevant content of S314. Other contents may refer to the related contents in fig. 3 to 9.

When the communication apparatus 1000 is a terminal or a chip in a terminal in the embodiment of the present application, the communication apparatus 1000 may implement the method performed by the terminal 13 in the embodiment described above. For example, the communication unit 1003 may receive time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, from the access network device 11, which may refer to the relevant contents of S303-S304. For example, the communication unit 1003 may receive SA slot resource pool indication information and DATA slot resource pool indication information from the access network apparatus 11, and may refer to the relevant contents of S305 to S306. For example, the processing unit 1001 may determine available symbols of the SA target slot, for example, the processing unit 1001 may determine available symbols of the SA target slot in combination with 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, which may refer to relevant contents of S311. For example, the processing unit 1001 may determine available symbols for the DATA target slot, e.g., the processing unit 1001 may determine available symbols for the DATA target slot in conjunction with 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, which may refer to the relevant contents of S313. For example, the communication unit 1003 may receive the SA from the terminal 12 at the available symbol 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 symbol of the DATA target slot, and may refer to the relevant content of S314. Other contents may refer to the related contents in fig. 3 to 9.

Communication apparatus 1000 may be an access network device in embodiments of the present application, such as access network device 111 or access network device 112. A schematic diagram of an access network device may be as shown in fig. 2A. Optionally, the communication unit 1003 of the apparatus 1000 may include an antenna and a transceiver of the access network device, such as the antenna 1115 and the transceiver 1113 in fig. 2A. The communication unit 1003 may also include a network interface for access network equipment, such as the network interface 1114 in fig. 2A.

Communication apparatus 1000 may be a chip in an access network device in the embodiment of the present application, for example, a chip in access network device 12 or access network device 13. The communication unit 1003 may be an input or output interface, pin, circuit, or the like. Alternatively, the storage unit may store a computer-executable 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, a RAM, or the like, and 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 may store static information and instructions, and the storage unit 1002 may be separate from the processing unit 1001. Alternatively, as wireless communication technology advances, a transceiver may be integrated with the communication device 1000, for example, the communication unit 1003 may be integrated with the transceiver 1113 and the network interface 1114.

When the communication apparatus 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 embodiment may be implemented. The communication unit 1003 may transmit time domain resource configuration information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, to the terminal 12 or the terminal 13, which may refer to the relevant contents in S301-S304. For example, the processing unit 1001 may determine SA slot resource pool indication information and 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 SA target slot indication information and DATA target slot indication information, and the communication unit 1003 may transmit the SA target slot indication information and the DATA target slot indication information to the terminal 12.

A communication apparatus 1100 according to an embodiment of the present application is described below. As shown in fig. 11:

the communication apparatus 1100 may include a communication unit 1101 and a determination unit 1102.

The communication apparatus 1100 may be the terminal 12 in the embodiment of the present application, and when the communication apparatus 1100 is the terminal 12, the communication apparatus 1100 may include the following functions:

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

Alternatively, the communication unit 1101 may receive SA slot resource pool indication information from the access network device 11. Reference may be made to the relevant content in S305.

Alternatively, the communication unit 1101 may receive DATA slot resource pool indication information from the access network device 11. Reference may be made to the relevant content in S306.

The determination unit 1102 may determine an SA target slot and a DATA target slot. Reference may be made to the relevant content in S308.

The determination unit 1102 may also determine available symbols for the SA target slot and available symbols for the DATA target slot. Reference may be made to the relevant contents in S309.

Alternatively, the determining unit 1102 may determine the available symbols of the SA target slot and the available symbols of the DATA target slot in combination with 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. Reference may be made to relevant content of S4a02, S4B03, S4C03 and S4D 02.

The communication unit 1101 may also transmit the SA to the terminal 13 on an available symbol of the SA target slot. Reference may be made to the relevant content in S312.

The communication unit 1101 may also transmit DATA to the terminal 13 on the available symbols of the DATA target slot. Reference may be made to the relevant content in S314.

When the communication apparatus 1100 is the terminal 12, the communication apparatus 1100 may also implement other functions implemented by the terminal 12, and may refer to the functions implemented by the terminal 12 in fig. 3 to 9.

The communication apparatus 1100 may be the terminal 13 in the embodiment of the present application, and when the communication apparatus 1100 is the terminal 13, the communication apparatus 1100 may include the following functions:

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

The determination unit 1102 may determine available symbols of the SA target slot and available symbols of the DATA target slot. Reference may be made to relevant contents in S311 and S313.

Alternatively, the determining unit 1102 may determine the available symbols of the SA target slot and the available symbols of the DATA target slot in combination with 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.

The communication unit 1101 may also receive the SA from the terminal 12 on the available symbols of the SA target slot. Reference may be made to the relevant content in S312.

The communication unit 1101 may also receive DATA from the terminal 12 on the available symbols of the DATA target slot. Reference may be made to the relevant content in S314.

The communication apparatus 1100 may also implement other functions implemented by the terminal 13, and may refer to the functions implemented by the terminal 13 in fig. 3 to 9.

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

the communication unit 1101 may transmit time domain resource information, such as one or more of cell-level semi-static configuration information, user-level semi-static configuration information, and user-level dynamic configuration information, to the terminal 12 or the terminal 13. Reference may be made to relevant content in S303-S304.

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

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

Alternatively, the communication unit 1101 may broadcast the SA slot resource pool indication information. Reference may be made to the relevant content in S305.

Alternatively, the communication unit 1101 may broadcast DATA slot resource pool indication information. Reference may be made to the relevant content in S306.

Alternatively, the determination unit 1102 may be configured to determine the SA target slot and the DATA target slot, and the communication unit 1101 may further transmit SA target slot indication information or DATA target slot indication information to the terminal 12.

The communication apparatus 1100 may also implement other functions implemented by the access network device 11, and may refer to the functions implemented by the access network device 11 in fig. 3 to 9.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

The embodiment of the application also 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 may include computer storage media and communication media, and may include any medium that can communicate a computer program from one place to another. A storage medium may be any target medium that can be accessed by a computer.

As an alternative design, a 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 that is targeted for carriage or stores desired program code in the form of instructions or data structures and that is accessible by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The embodiment of the 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, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in the above method embodiments are generated in whole or in part when the above computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

1. A D2D communication method, the method comprising:

receiving first time domain resource configuration information from access network equipment, wherein the first time domain resource configuration information is used for indicating that symbols included in first time domain resources are uplink symbols, downlink symbols or flexible symbols, the first time domain resources include at least one flexible symbol, and the first time domain resources include scheduling indication (SA) target time slots;

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 a symbol included in a second time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the second time domain resource includes at least one flexible symbol, and the second time domain resource includes a DATA target timeslot;

determining the SA target time slot and the DATA target time slot;

determining available symbols of the SA target slot;

determining available symbols for said DATA target slot;

sending an SA to a second terminal on the available symbol of the SA target time slot, wherein the SA carries DATA target time slot indication information, and the DATA target time slot indication information is used for indicating the DATA target time slot;

sending DATA to a second terminal on said available symbols of said DATA target slot.

2. The method of claim 1, further comprising:

receiving SA target time slot indication information and DATA target time slot indication information from access network equipment, wherein the SA target time slot indication information is used for indicating the SA target time slot, and the DATA target time slot indication information is used for indicating the DATA target time slot;

the determining the SA target slot and the DATA target 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.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

receiving, from an access network device, SA slot resource pool indication information and DATA slot resource pool indication information, the SA slot resource pool indication information indicating one or more SA reservation slots, the one or more SA reservation slots including the SA target slot, the DATA slot resource pool indication information indicating one or more DATA reservation slots, the one or more DATA reservation slots including the DATA target slot;

determining the SA target slot and the DATA target slot, comprising:

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 comprises the following steps:

determining the DATA target slot indication information.

4. A method of D2D communication, characterized in that the method comprises all the features of the method of any one of claims 1 to 3, wherein,

said SA also carries available symbol indication information for said DATA target slot, said available symbol indication information for said DATA target slot for indicating said available symbol for said DATA target slot.

5. A D2D communication method, the method comprising:

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 a first time domain resource is an uplink symbol, a downlink symbol, or a flexible symbol, the first time domain resource includes at least one flexible symbol, and the first time domain resource includes an SA target timeslot;

receiving SA time slot resource pool indication information, wherein the SA time slot resource pool indication information is used for indicating one or more SA reserved time slots, and the one or more SA reserved time slots comprise the SA target time slot;

determining available symbols of the SA target slot;

receiving a SA from a first terminal on said available symbol of said SA target slot, said SA comprising DATA target slot indication information, said DATA target slot indication information for indicating said DATA target slot;

determining available symbols for said DATA target slot;

receiving DATA from said first terminal on said available symbols of said DATA target slot.

6. A method of D2D communication, the method comprising all features of 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 via a system message.

7. The method of claim 6, further comprising:

receiving first user-level configuration information;

the first cell-level semi-static configuration information is further used for indicating 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 timeslot indicated by the first cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

8. The method of claim 7, wherein the determining the available symbols for the SA target slot comprises:

determining the available symbols of the SA target slot according to the first user-level configuration information.

9. The method of claim 7, wherein the determining the available symbols for the SA target slot comprises:

and 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.

10. The method of claim 8 or 9, wherein the first user-level configuration information comprises 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 timeslot 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.

11. A method of D2D communication, characterized in that the method comprises all the features of the method of any one of claims 1 to 5, wherein,

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.

12. The method of claim 11, wherein the determining the available symbols for the SA target slot comprises:

and determining the available symbols of the SA target time slot according to the first user-level dynamic configuration information.

13. A method of D2D communication, comprising all the features of the method of any one of claims 1 to 12, wherein the second time domain resource configuration information is second cell level semi-static configuration information;

14. The method of 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 timeslot indicated by the second cell-level semi-static configuration information is an uplink symbol or a downlink symbol.

15. The method as claimed in claim 14, wherein said determining said available symbols for said DATA target slot comprises:

determining the available symbols for the DATA target time slot based on the second user-level configuration information.

16. The method as claimed in claim 14, wherein said determining available symbols for said DATA target slot comprises:

and 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.

17. The method according to any of claims 14-16, wherein the second user-level configuration information comprises 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 timeslot 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 a GC PDCCH.

18. A method of D2D communication, characterized in that the method comprises all the features of the method of any one of claims 1 to 12,

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.

19. The method as claimed in claim 18, wherein said determining said available symbols for said DATA target slot comprises:

determining the available symbols for the DATA target time slot based on the second user-level dynamic configuration information.

20. A D2D communication method, the method comprising:

receiving SA time slot resource pool indication information, wherein the SA time slot resource pool indication information is used for indicating one or more SA reserved time slots, and the one or more SA reserved time slots comprise an SA target time slot;

determining available symbols in the SA target slot;

receiving a SA from a first terminal on said available symbols in said SA target slot, said SA including DATA target slot indication information for indicating a DATA target slot and available symbol indication information for a DATA target slot for indicating available symbols in said DATA target slot;

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

receiving DATA on said available symbols of said DATA target slot.

21. A method of D2D communication, characterized in that the method comprises all the features of the method of any one of claims 1 to 20, wherein,

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

22. A method of D2D communication, characterized in that the method comprises all the features of the method of any one of claims 1 to 21, wherein,

23. A communications device comprising a processor coupled to a memory, the memory for storing a computer program or instructions, the processor for executing the computer program or instructions in the memory such that the communications device performs the method of any of claims 1 to 22.

24. A computer readable storage medium for storing a computer program or instructions which, when executed, cause the computer to perform the method of any of claims 1 to 22.

25. A computer program product comprising a program which, when executed, causes the method of any of claims 1 to 22 to be performed.