CN111615192B

CN111615192B - Method and communication device for transmitting data

Info

Publication number: CN111615192B
Application number: CN201910133600.8A
Authority: CN
Inventors: 王俊伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2024-02-02
Anticipated expiration: 2039-02-22
Also published as: WO2020168946A1; CN111615192A

Abstract

The application provides a method and a communication device for transmitting data, so as to shorten the duration of idle channel assessment of terminal equipment, for example, in the scenes of auxiliary driving or advanced driving auxiliary systems, intelligent driving, intelligent internet access driving and the like, and further improve the data transmission performance. The method comprises the following steps: the method comprises the steps that a first terminal device obtains information of a first resource pool and information of a second resource pool, resource network devices in the first resource pool are resources allocated to the terminal device, and the resources in the second resource pool are resources obtained by the terminal device through idle channel assessment, wherein the first resource pool and the second resource pool are not overlapped; the first terminal equipment sends first data to the second terminal equipment by using first resources in a first resource pool, wherein the first resources are resources allocated by the network equipment; and/or the first terminal equipment sends second data to the third terminal equipment by using second resources in the second resource pool, wherein the second resources are acquired through idle channel evaluation.

Description

Method and communication device for transmitting data

Technical Field

The present application relates to the field of communications, and more particularly, to a method of transmitting data and a communication apparatus.

Background

In a wireless communication system, for example, in a fifth generation (5 th-generation, 5G) mobile communication system, communication between a vehicle and everything (vehicle to everything, V2X) is supported.

In V2X communication, various types of traffic are supported. For example, there are security related services that require relatively stringent latency requirements; there are also non-secure types of traffic that require lower latency requirements. As another example, there is periodic traffic, the traffic being generated predictably, periodically; there are also non-periodic traffic that produces less predictive, non-periodic transmissions.

How does the terminal device transmit data for different types of traffic?

Disclosure of Invention

The application provides a data transmission method and a communication device, which are used for reducing channel detection time and improving data transmission performance.

In a first aspect, a method of transmitting data is provided. The method may be performed by the terminal device, or may be performed by a chip or a circuit configured in the terminal device, which is not limited in this application.

The method may include: the method comprises the steps that a first terminal device obtains information of a first resource pool and information of a second resource pool, resource network devices in the first resource pool are resources allocated to the terminal device, the resources in the second resource pool are resources obtained by the terminal device through idle channel assessment, and the first resource pool and the second resource pool are not overlapped; the first terminal equipment sends first data to the second terminal equipment by using first resources in the first resource pool, wherein the first resources are resources allocated by the network equipment; and/or the first terminal equipment uses the second resource in the second resource pool to send second data to the third terminal equipment, wherein the second resource is obtained through idle channel evaluation.

Based on the technical scheme, by acquiring the information of the first resource pool and the information of the second resource pool, when the terminal equipment needs to perform idle channel assessment, idle channel assessment can be performed on the second resource pool, so that the time of channel detection is shortened, and the data transmission performance is improved. In addition, when the terminal device needs to transmit data using the allocated resources, the data can be transmitted using the resources in the first resource pool, thereby improving data transmission performance. Therefore, aiming at different resource acquisition modes, the terminal equipment can acquire the corresponding resources, so that the operation amount of the terminal equipment is reduced, the data transmission performance is improved, and the user experience is improved.

For example, clear channel assessment includes at least two ways: channel-based detection (which may also be referred to as sensing) and energy-based detection (or LBT). In particular, the following examples are presented.

Alternatively, the second terminal device and the third terminal device may be the same terminal device, or may be different terminal devices. The first terminal device may transmit data using resources in the first resource pool or may transmit data using resources in the second resource pool.

With reference to the first aspect, in certain implementations of the first aspect, the second resource pool includes a first time unit group and a second time unit group, the first resource pool includes a third time unit group, the third time unit group is located between the first time unit group and the second time unit group, the third time unit group is adjacent to the first time unit group, and the third time unit group is adjacent to the second time unit group; the method further comprises the steps of: the first terminal equipment performs idle channel assessment in the first time unit group based on idle channel assessment parameters; and under the condition that the first time unit group does not acquire the second resource, the first terminal equipment re-performs idle channel assessment in the second time unit group based on the idle channel assessment parameter or the re-determined idle channel assessment parameter.

Based on the technical scheme, the terminal equipment can carry out idle channel assessment again when the time unit group of the second resource pool starts based on the same idle channel assessment parameters or the redetermined idle channel assessment parameters, so that the problem of monitoring the boundary resources based on the idle channel assessment can be solved.

For example, the time units may be: subframes, slots, symbols, etc.

With reference to the first aspect, in some implementations of the first aspect, when the first terminal device does not acquire the second resource and an interval between an end position of the first time unit group and a start position of the second time unit group is greater than or equal to a preset first threshold, performing idle channel assessment again in the second time unit group based on the idle channel assessment parameter or the redetermined idle channel assessment parameter.

With reference to the first aspect, in certain implementations of the first aspect, the second resource pool includes a first frequency domain resource group and a second frequency domain resource group, and the method further includes: and carrying out idle channel assessment on the frequency domain corresponding to the first frequency domain group.

For example, the frequency domain group may include: subchannels, subcarriers, subcarrier groups, and the like.

With reference to the first aspect, in certain implementations of the first aspect, the second resource pool includes a first time unit group and a second time unit group, the first resource pool includes a third time unit group, the third time unit group is located between the first time unit group and the second time unit group, the third time unit group is adjacent to the first time unit group, and the third time unit group is adjacent to the second time unit group; the method further comprises the steps of: the first terminal equipment performs idle channel assessment in the first time unit group based on idle channel assessment parameters; the first terminal equipment suspends idle channel assessment under the condition that the first time unit group does not acquire the second resource; and the first terminal device continues the clear channel assessment at the second time unit group based on the clear channel assessment parameter.

Based on the technical scheme, the terminal equipment can suspend idle channel assessment firstly, and then continue to carry out idle channel assessment based on the same idle channel assessment parameters when the time unit group of the second resource pool starts, so that the problem of monitoring the boundary resources based on idle channel assessment can be solved.

With reference to the first aspect, in certain implementation manners of the first aspect, the first terminal device suspends idle channel assessment when an interval between an end position of the first time unit group and a start position of the second time unit group is smaller than a preset second threshold value in a case that the first time unit group does not acquire the second resource.

Based on the above technical solution, the terminal device may suspend idle channel assessment when a certain condition is satisfied.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes: the first terminal equipment receives indication information, wherein the indication information is used for indicating information of the first resource pool and/or information of the second resource pool; the first terminal device obtains information of a first resource pool and information of a second resource pool, including: and the first terminal equipment acquires the information of the first resource pool and the information of the second resource pool according to the indication information.

Based on the above technical solution, the network device may only indicate the information of the first resource pool to the terminal device, and the terminal device may determine the information of the first resource pool and the second resource pool according to the indication information. Alternatively, the network device may indicate only the information of the second resource pool to the terminal device, and the terminal device may determine the information of the first resource pool and the second resource pool according to the indication information. Or, the network device may indicate the information of the first resource pool and the second resource pool to the terminal device, and the terminal device may determine the information of the first resource pool and the second resource pool according to the indication information.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes: the first terminal equipment receives side uplink control information SCI at a first time domain position and/or a first frequency domain position, wherein the SCI is used for indicating resources in the second resource pool; the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value; or, the interval between the first frequency domain position and the frequency domain starting position in the second resource pool is smaller than or equal to a preset fifth threshold value, and/or the interval between the first moment and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold value.

Based on the above technical solution, when the service configured in the first resource pool is urgent or has a higher priority, the terminal device may preempt the resource in the second resource pool, for example, may send SCI to the terminal device to indicate information such as scheduling duration, so as to shorten the detection time of the terminal device.

In a second aspect, a method of transmitting data is provided. The method may be performed by the network device, or may be performed by a chip or a circuit configured in the network device, which is not limited in this application.

The method comprises the following steps: the network equipment divides a first resource pool and a second resource pool, wherein the resources in the first resource pool are the resources allocated by the network equipment for the terminal equipment, the resources in the second resource pool are the resources obtained by the terminal equipment through idle channel evaluation, and the first resource pool and the second resource pool are not overlapped; the network device sends information of the first resource pool and/or information of the second resource pool.

Based on the technical scheme, the network equipment can divide the information of the first resource pool and the second resource pool, so that when the terminal equipment needs to perform idle channel assessment, idle channel assessment can be performed on the second resource pool, further, the time of channel detection is shortened, and the data transmission performance is improved. In addition, when the terminal device needs to transmit data using the allocated resources, the data can be transmitted using the resources in the first resource pool, thereby improving data transmission performance. Therefore, aiming at different resource acquisition modes, the terminal equipment can acquire the corresponding resources, so that the operation amount of the terminal equipment is reduced, the data transmission performance is improved, and the user experience is improved.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device uses resource sending side uplink control information SCI in the first resource pool at a first time domain position and/or a first frequency domain position, wherein the SCI is used for indicating resources in the second resource pool; the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value; the interval between the first frequency domain position and the frequency domain starting position in the second resource pool is smaller than or equal to a preset fifth threshold value, and/or the interval between the first moment and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold value.

With reference to the first aspect or the second aspect, in certain implementations, the first resource pool and the second resource pool overlap in a time domain and do not overlap in a frequency domain; alternatively, the first resource pool and the second resource pool overlap in the frequency domain and do not overlap in the time domain.

That is, the first resource pool and the second resource pool may be divided based on a time domain or may be divided based on a frequency domain.

In a third aspect, a communication device is provided. The communication device may be a terminal device, or may be a chip or a circuit configured in the terminal device, which is not limited in this application.

The device can comprise a communication unit and a processing unit, wherein the processing unit is used for acquiring information of a first resource pool and information of a second resource pool, the resource network equipment in the first resource pool is a resource allocated to the terminal equipment, the resource in the second resource pool is a resource obtained by the terminal equipment through idle channel evaluation, and the first resource pool and the second resource pool are not overlapped; the communication unit is used for sending first data to the second terminal equipment by using first resources in the first resource pool, wherein the first resources are resources allocated by the network equipment; and/or the communication unit is used for sending second data to the third terminal equipment by using second resources in the second resource pool, wherein the second resources are acquired through idle channel assessment.

With reference to the third aspect, in certain implementations of the third aspect, the second resource pool includes a first time unit group and a second time unit group, the first resource pool includes a third time unit group, the third time unit group is located between the first time unit group and the second time unit group, the third time unit group is adjacent to the first time unit group, and the third time unit group is adjacent to the second time unit group; the processing unit is further configured to: based on idle channel assessment parameters, performing idle channel assessment on the first time unit group; and carrying out idle channel assessment again in the second time unit group based on the idle channel assessment parameter or the redetermined idle channel assessment parameter under the condition that the first time unit group does not acquire the second resource.

With reference to the third aspect, in some implementations of the third aspect, when the first time unit group does not acquire the second resource and an interval between an end position of the first time unit group and a start position of the second time unit group is greater than or equal to a preset first threshold, performing idle channel assessment again in the second time unit group based on the idle channel assessment parameter or the redetermined idle channel assessment parameter.

With reference to the third aspect, in some implementations of the third aspect, the second resource pool includes a first frequency domain resource group and a second frequency domain resource group, and the processing unit is further configured to: and carrying out idle channel assessment on the frequency domain corresponding to the first frequency domain group.

With reference to the third aspect, in certain implementations of the third aspect, the second resource pool includes a first time unit group and a second time unit group, the first resource pool includes a third time unit group, the third time unit group is located between the first time unit group and the second time unit group, the third time unit group is adjacent to the first time unit group, and the third time unit group is adjacent to the second time unit group; the processing unit is further configured to: based on idle channel assessment parameters, performing idle channel assessment on the first time unit group; suspending clear channel assessment if the first time unit group does not acquire the second resource; and continuing the clear channel assessment at the second time unit group based on the clear channel assessment parameter.

With reference to the third aspect, in certain implementations of the third aspect, when the first time unit group does not acquire the second resource and an interval between an end position of the first time unit group and a start position of the second time unit group is smaller than a preset second threshold, the processing unit is further configured to: suspending clear channel assessment.

With reference to the third aspect, in certain implementations of the third aspect, the communication unit is further configured to: receiving indication information, wherein the indication information is used for indicating the information of the first resource pool and/or the indication information is used for indicating the information of the second resource pool; the processing unit is specifically configured to: and acquiring the information of the first resource pool and the information of the second resource pool according to the indication information.

With reference to the third aspect, in certain implementations of the third aspect, the communication unit is further configured to: receiving side uplink control information, SCI, at a first time domain location and/or a first frequency domain location, the SCI being for indicating resources in the second resource pool; the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value; the interval between the first frequency domain position and the frequency domain starting position in the second resource pool is smaller than or equal to a preset fifth threshold value, and/or the interval between the first moment and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold value.

In a fourth aspect, a communication device is provided. The apparatus may be a network device, or may be a chip or a circuit configured in the network device, which is not limited in this application.

The device may include a communication unit and a processing unit, where the processing unit is configured to divide a first resource pool and a second resource pool, where resources in the first resource pool are resources allocated by the network device to the terminal device, and resources in the second resource pool are resources obtained by the terminal device through idle channel estimation, and the first resource pool and the second resource pool do not overlap; the communication unit is used for sending the information of the first resource pool and/or the information of the second resource pool.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the communication unit is further configured to, at a first time and/or a first frequency domain location, use resource transmission side uplink control information SCI in the first resource pool, where the SCI is configured to indicate resources in the second resource pool; the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value; the interval between the first frequency domain position and the frequency domain starting position in the second resource pool is smaller than or equal to a preset fifth threshold value, and/or the interval between the first time domain position and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold value.

With reference to the third aspect or the fourth aspect, in some implementations, the first resource pool and the second resource pool overlap in a time domain and do not overlap in a frequency domain; alternatively, the first resource pool and the second resource pool overlap in the frequency domain and do not overlap in the time domain.

In a fifth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect and any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal device. When the communication means is a chip arranged in the terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the second aspect and any one of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication apparatus is a network device. When the communication apparatus is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication means is a chip configured in a network device, the communication interface may be an input/output interface.

In a seventh aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive signals via the input circuit and to transmit signals via the output circuit, such that the processor performs the first or second aspect and the method in any one of the possible implementations of the first or second aspect.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In an eighth aspect, a processing device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive a signal via the receiver and to transmit a signal via the transmitter to perform the first or second aspect and any one of the possible implementations of the first or second aspect.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the eighth aspect may be a chip, and the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a ninth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of the first or second aspect and any one of the possible implementations of the first or second aspect.

In a tenth aspect, there is provided a computer readable medium storing a computer program (which may also be referred to as code, or instructions) which when run on a computer causes the computer to perform the method of the first or second aspect and any one of the possible implementations of the first or second aspect.

An eleventh aspect provides a communication system comprising the aforementioned network device and terminal device.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use in embodiments of the present application;

FIG. 2 is another schematic diagram of a communication system suitable for use in embodiments of the present application;

FIG. 3 shows a schematic diagram of V2X detection of idle channels;

FIG. 4 illustrates a schematic diagram of ambient traffic and aperiodic traffic acquisition resources;

FIG. 5 is a schematic interaction diagram of a method of transmitting data provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of an indication resource suitable for use in a method of transmitting data according to an embodiment of the present application;

FIG. 7 is yet another schematic diagram of an indication resource suitable for use in a method of transmitting data in embodiments of the present application;

FIG. 8 is a schematic diagram of performing LBT for a method of transmitting data according to an embodiment of the present application;

FIG. 9 is yet another schematic diagram of performing LBT for a method of transmitting data in accordance with an embodiment of the present application;

FIG. 10 is another schematic diagram of performing LBT for a method of transmitting data in accordance with an embodiment of the present application;

FIG. 11 is a schematic interaction diagram of a method of transmitting data provided in a further embodiment of the present application;

FIG. 12 is a schematic interaction diagram of a method of transmitting data provided in another embodiment of the present application;

FIG. 13 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 15 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: driving assistance (driver assistance) or advanced driving assistance system (advanced driver assistance systems, ADAS), intelligent driving (intelligent driving), intelligent internet driving (intelligent network driving), future fifth generation (5th generation,5G) systems or New Radio (NR), global system for mobile communications (global system for mobile communications, GSM) systems, code division multiple access (code division multiple access, CDMA) systems, wideband code division multiple access (wideband code division multiple access, WCDMA) systems, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), general mobile communication systems (universal mobile telecommunication system, UMTS), global interconnect microwave access (worldwide interoperability for microwave access, wiMAX) communication systems, and the like. The technical solutions of the embodiments of the present application may also be applied to device-to-device (D2D) communication, machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and communication in a vehicle network system. The communication modes in the vehicle network system are collectively called vehicle-to-everything (V2X), and X represents anything. For example, the V2X communication includes: vehicle-to-vehicle (vehicle to vehicle, V2V), vehicle-to-roadside infrastructure (vehicle to infrastructure, V2I), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), or vehicle-to-network (vehicle to network, V2N), etc.

To facilitate an understanding of the embodiments of the present application, a communication system suitable for use in the embodiments of the present application will be described in detail with reference to fig. 1 and 2.

Fig. 1 is a schematic diagram of a wireless communication system 100 suitable for use in embodiments of the present application.

As shown in fig. 1, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in fig. 1, and the wireless communication system 100 may further include at least one terminal device, such as the terminal device 121 shown in fig. 1, and the terminal device 123. The network device and the terminal device may each be configured with multiple antennas, and the network device and the terminal device may communicate using multiple antenna technology.

One network device may manage one or more cells, and there may be an integer number of terminal devices in a cell. Alternatively, the network device 111 and the terminal device 121 constitute a single-cell communication system to the terminal device 123, and this cell is denoted as cell #1 without loss of generality. Network device 111 may serve a terminal device (e.g., terminal device 121) in cell #1.

It should be noted that a cell is understood to be a serving cell of a network device, i.e. an area within the coverage area of a wireless network of the network device.

It should be understood that, in fig. 1, the network device 111 and the terminal device 121 are schematically shown for understanding only and should not constitute any limitation to the present application, and the wireless communication system may further include a greater number of network devices, or may include a greater or fewer number of terminal devices, where the same network device may communicate with different terminal devices, or may also communicate with different terminal devices, and this application is not limited thereto.

Fig. 2 is another schematic diagram of a wireless communication system 200 suitable for use in embodiments of the present application. As shown in fig. 2, the technical solution of the embodiment of the present application may also be applied to D2D communication.

With the development of wireless communication technology, there is an increasing demand for high data rates and user experiences, while there is an increasing demand for proximity services for knowing and communicating with surrounding people or things, so D2D technology has grown. The application of the D2D technology can reduce the burden of a cellular network, reduce the battery power consumption of terminal equipment, improve the data rate and well meet the requirement of adjacent service. D2D technology can allow a plurality of D2D-capable terminal devices to transmit and receive signals with or without a network infrastructure therebetween. In view of the characteristics and advantages of the D2D technology, a car networking application scenario based on the D2D technology is proposed. For example, V2X internet of vehicles technology is proposed under the network of LTE technology proposed by the third generation partnership project (the 3rd generation partnership project,3GPP). The V2X communication refers to communication between the vehicle and the outside, and includes V2V communication, V2P communication, V2I communication, and V2N communication. The V2N is the most widely applied form of the Internet of vehicles at present, and the main function of the V2N is to enable the vehicle to be connected to a cloud server through a mobile network, and the application functions of navigation, entertainment, theft prevention and the like provided by the cloud server are used. V2V can be used as an inter-vehicle information interaction and reminder, most typically for use in an inter-vehicle collision avoidance safety system. The V2I may be used as a vehicle to communicate with roads and even other infrastructure, such as traffic lights, road blocks, etc., to obtain road management information such as traffic light signal timing. V2P may be used as a safety warning for pedestrians or non-vehicles on the road, etc.

As shown in fig. 2, the wireless communication system 200 includes a plurality of terminal devices, such as terminal device 124 and terminal device 126 in fig. 2. Terminal devices 124 and 126 may communicate directly with each other. For example, terminal device 124 and terminal device 125 may send data to terminal device 126 separately or simultaneously.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. The network devices include, but are not limited to: a Base Station (BS), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP), a radio relay Node, a radio backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP) in a wireless fidelity (wireless fidelity, WIFI) system, or the like, may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group of antenna panels (including a plurality of antenna panels) of a base station in a 5G system, or may also be a network Node, e.g., a unit (BBU), or a distributed unit (baseband), or the like, constituting a gNB or a transmission point.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the functions of the gNB, the DU implements part of the functions of the gNB, for example, the CU implements the functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, and the DU implements the functions of a radio link control (radio link control, RLC), a medium access control (media access control, MAC), and a Physical (PHY) layer. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+cu. It is understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should also be appreciated that the terminal devices in the wireless communication system may also be referred to as User Equipment (UE), access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, user equipment, or the like. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a vehicle-mounted communication device, or the like. The embodiments of the present application are not limited to application scenarios.

It should be understood that fig. 2 schematically illustrates the terminal device 124 and the terminal device 126 for ease of understanding only, but this should not constitute any limitation to the present application, and that a greater or lesser number of terminal devices and a greater number of network devices may be included in the wireless communication system, which is not limited to this application.

It should be understood that fig. 1 and 2 are merely exemplary, and the application is not limited thereto, for example, embodiments of the application may also be applied to: in the scenes of auxiliary driving or advanced driving auxiliary systems, intelligent driving, intelligent internet driving and the like.

Take V2X communication as an example. V2X communication is a basic technology and a key technology applied to high-speed equipment represented by vehicles in the scene with very high requirements on communication delay in the future, such as intelligent automobiles, automatic driving, intelligent transportation systems and the like.

In order to facilitate an understanding of the embodiments of the present application, a brief description of several terms or expressions referred to herein follows.

1. Transmission mode of V2X communication

The transmission modes of V2X communication include a broadcast mode, a multicast mode, and a unicast mode.

Broadcasting mode: the transmitting end adopts a broadcasting mode to transmit data, and all receiving ends can analyze the side uplink control information (sidelink control information, SCI) and the side uplink shared channel (sidelink shared channel, SSCH) information. In the side link (sidelink), the manner of ensuring that all terminal devices can parse the control information may be: the control information data is not scrambled or a scrambling code known to all terminal devices is used.

Multicast mode: the multicast mode is similar to the broadcast mode, the data transmission is carried out by adopting the broadcast mode, and all receiving ends can analyze the control channel information and the side-link shared channel. The control information data is not scrambled or a scrambling code known by all terminal devices is used, a multicast Identification (ID) is added in the control information, the control information is analyzed to the terminal devices of the control information, and whether the data need to be received is confirmed by identifying the multicast ID.

Unicast (unicasting) mode: and supporting a hybrid automatic repeat request (hybrid automatic repeat reQuest, HARQ) process, determining whether to retransmit or not by a transmitting end according to feedback of a receiving end, and performing coding adjustment according to a channel fed back by the receiving end.

2. Service type for V2X communication

In V2X communications, there are many services sent by a terminal device, including but not limited to: road safety class traffic and non-road safety class traffic.

Road safety service: related to traffic safety, the service requirement has higher real-time performance, and needs to be transmitted as soon as possible by the system, such as emergency braking signals sent by a front vehicle, vehicle lane change information, front emergency traffic accident risk avoidance notification and the like.

Non-road safety class traffic: not directly related to road safety, such as: vehicle sensor information sharing, fleet information sharing, and the like.

As can be seen from the above, in V2X communication, a service of a security type (i.e., a service related to security) is included, which has a strict requirement for time delay, and a service of a non-security type is also included, which has a lower requirement for time delay. In V2X communication, periodic traffic (traffic generation predictable, periodic transmissions) is also included, as is non-periodic traffic (traffic generation less predictive, not periodic transmissions).

3. Communication mode of V2X communication

In V2X communication, the communication mode of the terminal device may include PC 5-based interface communication and Uu-based interface communication.

The Uu interface based communication mode, which may also be referred to as Uu communication mode or Uu interface communication mode, means that communication is performed through Uu interface technology, i.e. network communication, and V2X communication data needs to be transmitted through a mobile operator network.

Based on the PC5 interface communication, communication by the PC5 interface technology, that is, direct communication, V2X communication data is directly transmitted between terminal devices (V2X terminal devices), in other words, communication can be directly performed between the terminal devices. The PC5 interface may be used under non-coverage (OOC) and coverage (in coverage, IC) and the authorized terminal device uses the PC5 interface for transmission. The transmission link between the terminal device and the terminal device may also be referred to as a side link (side link) or a through link (side link).

4. Channel frequency band for V2X communication

Channel band for V2X, comprising two of:

one is that the frequency band is shared with the Uu interface, namely, a direct link between terminal equipment and terminal equipment, and the Uu interface between the terminal equipment and network equipment shares the frequency band in a time division or frequency division mode;

still another is that the separate dedicated frequency band of V2X (e.g. frequency point near 6G allocated in china, 20M spectrum), i.e. the through link between the terminal device and the terminal device is a separate frequency band, not shared with Uu interface. Different systems may be shared, such as LTE-V2X and NR-V2X, and embodiments of the present application are not limited in this regard.

5. Side-uplink control information SCI

May also be referred to as side link control information. Where the side link or Sidelink (SL) refers to the transmission link between the terminal devices. In SL, data transmission between terminal devices is not relayed through network devices. Such as the system 200 shown in fig. 2.

6. Multiple access scheme

In a communication system, such as an LTE or NR system, two multiple access modes are included:

(1) Single-carrier frequency division multiple access (SC-FDMA) carrier frequency-division multiple access: the SC-FDMA implementation process is an orthogonal frequency division multiplexing multiple access technical scheme (discrete fourier transform orthogonal frequency division multiplexing, DFT-OFDM) of discrete Fourier transform spread spectrum, is a single carrier frequency division multiple access scheme of frequency domain generated signals, and has the greatest advantages of better peak-to-average ratio and lower requirement on an uplink transmitter. The transform precoding may also be referred to as NR (transform precoding).

(2) Orthogonal frequency division multiple access (orthogonal frequency division multiplexing access, OFDMA): the transmission bandwidth is divided into a series of orthogonal non-overlapping subcarrier sets, different subcarrier sets being allocated to different users, which may also be referred to as cyclic prefix orthogonal frequency division multiplexing (cyclic prefix orthogonal frequency division multiplexing, CP-OFDM).

In some systems, such as in LTE systems, OFDMA is used downstream and SC-FDMA is used upstream; in some systems, such as in NR systems, the lower uses OFDMA and the upper uses SC-FDMA or OFDMA, configured by the network. In some systems, such as in LTE-V2X systems, SC-FDMA is used.

It is to be understood that the foregoing is merely illustrative and that the present application is not limited thereto.

7. Data or data information

In the embodiment of the present application, "data" or "data information" may be understood as bits generated by encoding an information block, or "data" or "data information" may also be understood as modulation symbols generated by encoding and modulating an information block. The data or data information may be carried by time-frequency resources, which may include resources in the time domain and resources in the frequency domain. Where in the time domain, the time-frequency resource may comprise one or more time-domain units (or may also be referred to as time units), and in the frequency domain, the time-frequency resource may comprise frequency-domain units or resource units.

Wherein one time domain unit (which may also be referred to as a time unit) may be one symbol, or one mini-slot (mini-slot), or one slot (slot), or one subframe (subframe), wherein the duration of one subframe in the time domain may be 1 millisecond (ms), one slot may be composed of 7 or 14 symbols, and one mini-slot may include at least one symbol (e.g., 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).

Wherein, frequency domain unit or resource unit: can be used as a measure of the resources occupied by the resources in the time-frequency domain. In the embodiment of the present application, the resource unit may include, for example, a sub-channel bandwidth (sub-channel bandwidth) sub-band (subband), an RB, a Resource Block Group (RBG) formed by one or more RBs, one or more RB pairs (RB pair), a half RB, 1/4 RB, an RE group formed by one or more REs, and so on. In the NR protocol, one RB is composed of 12 consecutive subcarriers in the frequency domain and 14 consecutive symbols in the time domain. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way.

8. Time slots

In NR, a slot is the smallest scheduling unit of time. One format of a slot is to contain 14 OFDM symbols, each of which has a Cyclic Prefix (CP) of conventional CP (normal cyclic prefix). One slot format is 12 OFDM symbols, with the CP of each OFDM symbol being an extension CP (extended cyclic prefix). One format of a slot is to contain 7 OFDM symbols, the CP of each OFDM symbol being a normal CP. The OFDM symbols in one slot may be all used for uplink transmission; the method can be used for downlink transmission; or a part of the data can be used for downlink transmission, a part of the data can be used for uplink transmission, and a part of the data is reserved and not transmitted. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way. The slot format is not limited to the above example for system forward compatibility.

9. Resource scheduling for V2X communications

In PC5 interface based communications, the determination of the relevant communication channel resources may be selected based on a pool of resources (or a default configured pool of resources) configured by the network device (e.g., base station). In general, V2X through link transmission supports two modes:

mode 1 (Mode 1): network device scheduling mode. The terminal device needs to be in a radio resource control (radio resource control, RRC) connected state. The terminal device first makes a resource request to the network device, and then the network device allocates control resources and data resources on the V2X through link. Briefly, mode 1 is based on the network device's resource allocation and scheduling of the pass-through link.

Mode 2 (Mode 2): the allocation of resources is not based on (Mode 1) scheduling or pre-configuration. Mainly comprises the following categories:

(1) The terminal equipment selects transmission resources of the direct link by itself;

(2) The terminal equipment assists other terminal equipment to select transmission resources of the direct link;

(3) The terminal equipment is configured with some resources for transmission;

(4) The terminal device (which may, for example, act as a master terminal device) schedules the through links for the other terminal devices.

For mode 2, the terminal device may use any of the following idle channel assessment methods to acquire the transmission channel:

method 1: based on channel detection (or called sensing);

method 2: based on energy detection (or called listen before talk (listen before talk, LBT)).

The two methods are briefly described below.

Method 1: based on channel detection.

Based on the channel detection process (or referred to as the control channel detection process), the current standard is called as a sending process, and the main characteristics include: the SCI on the control channel is analyzed, and the purpose of the SCI is to acquire the occupation condition of the current channel (data channel and control channel) and the future occupation condition; the energy on the channels is calculated, the distance of the terminal devices where these channels are used is calculated, and in case no channels are available for use, the same channels are used preferentially and by the terminal devices far away. .

The SCI on the analytic control channel is based on the periodicity of the V2X traffic, i.e. the detection time window for which the terminal device listens for a certain length (e.g. 1 second). Resolving SCI on control channel, wherein the scheduling signaling includes: the traffic cycle, the channels occupied by the traffic, deduces from the monitored time window which channels are occupied and which channels are idle for the next period of time.

After the detection time window is passed, the terminal device deduces which time channels can be occupied, the channel occupation and the data transmission time are not immediately transmitted, but a time is randomly selected for transmission in a channel selection time window, so that the data interference between the terminal devices can be reduced.

Fig. 3 shows a schematic diagram of V2X detection of idle channels. As shown in fig. 3, the assumptions include: channel 1, channel 2, channel 3, channel 4, channel 5, channel 6. The terminal equipment determines by detecting SCI of each channel in the monitoring time window: channel 1, channel 2, channel 3 have been occupied and continue to be occupied at time 3 and time 4; channel 4, channel 5, channel 6 are not occupied during the monitoring time window. The terminal device can thus infer that channel 4, channel 5, channel 6 are available at times 3 and 4.

Method 2: energy-based detection

The method based on energy detection is also called LBT interception mechanism, namely if the detected capacity is lower than a certain threshold within a certain window length, the channel is considered to be idle and available, otherwise, the channel needs to be retracted backwards for a period of time randomly, and interception is continued.

The third generation partnership project (the 3rd generation partnership project,3GPP) evaluates four channel access mechanisms:

the first is the LBT-free listening mechanism: there are regions and countries where it is not mandatory to implement LBT mechanisms on unlicensed bands.

The second is a random back-off free LBT: a clear channel assessment (clear channel assessment, CCA) is performed prior to the data transmission using a fixed duration frame including channel occupancy time and clear time. If the channel is idle, data transmission is performed in the time occupied by the subsequent channel, otherwise, data cannot be transmitted in the whole frame period. The length of time that the sender determines whether the signal is idle before sending the data is determined.

The third is a random back-off LBT with a fixed length contention window: a frame structure with a non-fixed frame period is used, and a mode based on load change is adopted. The contention window is fixed in length, and with extended CCA (ECCA), data transmission may begin immediately upon detection of a channel idle, otherwise a contention window, i.e., a fixed number of ECCA windows, is entered.

The fourth is a random back-off LBT with non-fixed length contention window: after detecting that the channel is occupied or the maximum transmission time is reached, the transmitting end enters a contention window. Instead of using a fixed-length contention window, the sender may change the length of the contention window. In this regard, regarding the generation and use of the contention window, that is, the terminal device generates a random number M (M is greater than or equal to 0 and M is less than or equal to N) from 0 to N (N is a configured value and N is greater than 0) before performing the LBT listening mechanism, each time 1 slot is detected as being idle, M is decremented by one until M is reduced to 0.

The 3GPP uses the above-mentioned fourth LBT listening mechanism (LBT CAT 4), i.e. random back-off LBT of non-fixed length contention window, as a basis for an access mechanism for unlicensed-spectrum (LAA) downlink containing physical downlink shared channels (physical downlink shared channel, PDSCH). Interception before channel transmission of the demodulation reference signal (demodulation reference signal, DRS) is performed using the second type (LBT CAT 2) described above. The LBT listening mechanism can ensure that LTE networks coexist and fairly compete with other networks.

In the embodiment of the present application, the idle channel assessment at least includes the above method 1 and method 2. Both the method 1 and the method 2 need to check the channel usage in a certain window time. For example, the sending mechanism is based on detecting control information of the control channel, and the time length may be 1 second; the LBT mechanism is based on energy detection, and the time length may be determined randomly, and for brevity, the time windows detected in the above method 1 or method 2 are collectively referred to as detection time windows. Whether the method 1 or the method 2 is adopted, after the detection time window is finished, whether a channel is available or not is judged, and if the channel is available, the channel can be used for transmitting data.

The following is collectively represented by a clear channel assessment.

As described above, the resource acquisition method includes a network device-based allocation method and a terminal device-based self-acquisition method. As can be seen from the foregoing, the traffic in V2X communication includes periodic traffic and aperiodic traffic, and then the surrounding traffic and aperiodic traffic acquisition resources can be based on a combination of long period detection (or network device allocation) and short period detection (or LBT).

Fig. 4 shows a schematic diagram of the ambient traffic and aperiodic traffic acquisition resources. In fig. 4, terminal equipment a, terminal equipment B, terminal equipment C, and terminal equipment E are illustrated as examples, and are denoted as UE a, UE B, UE C, and UE E, respectively, for the sake of distinction. Wherein, it is assumed that UE a, UE B, UE C periodically transmit traffic, in other words, UE a, UE B, UE C transmit data of periodic traffic; UE E aperiodically transmits traffic, in other words, UE E transmits data of aperiodic traffic. As shown in fig. 4, the carrier resources are divided into two dimensions of a frequency domain and a time domain, and the frequency domain includes: subband (subband) 1, subband 2, subband 3, the time domain comprising: t1, T2, T3, T4, T5, T6, T7, T8.

The UE A, the UE B and the UE C send periodic services (such as periodic broadcast signals), and the terminal devices respectively acquire corresponding parts of service resources through long-term detection. For example, the frequency domain resource acquired by UE a includes subband 2, and the time domain includes: t1, T4, T7. When sending SCI, the sender broadcasts the resource reservation message to other terminal devices.

UE E sends aperiodic traffic and, after detecting reserved resources of UE a, UE B, UE C, finds out the spare resources, e.g., frequency domain resources including subband 3, time domain resources T3 and T6. The UE E needs to first send the resource reservation information (frequency domain resource sub-band 3, time domain resource T6) on the frequency domain resource sub-band 3, time domain resource T3, and send the data on the frequency domain resource sub-band 3, time domain resource T6.

From the above, it can be seen that, for the UE E transmitting the aperiodic service, it is necessary to detect the channel for a long time, so as to increase the power consumption of the terminal device, on the one hand, increase the operation amount of the terminal device, and on the other hand, increase the time delay of the aperiodic service, which is not beneficial to the data transmission performance.

In view of this, the present application provides a method for transmitting data, which can shorten the time of channel detection, thereby improving the data transmission performance.

Further, in order to facilitate understanding of the embodiments of the present application, the following description is made.

In the embodiments illustrated below, the terms "network" and "system" are often used interchangeably, but those skilled in the art will understand their meaning. Information, signals, messages, channels may sometimes be mixed, it being noted that the meaning of the expression is consistent when de-emphasizing the distinction. "of", "corresponding" and "corresponding" are sometimes used in combination, and it should be noted that the meaning of the expression is consistent when the distinction is not emphasized.

In this application, "for indicating" may include for direct indication and for indirect indication. When describing that certain indication information is used for indicating A, the indication information may be included to directly indicate A or indirectly indicate A, and does not represent that the indication information is necessarily carried with A.

In the embodiments shown below, the first, second, and third are merely for convenience in distinguishing between different objects, and should not constitute any limitation to the present application. E.g. to distinguish between different resource pools, etc.

In the embodiments shown below, "pre-fetching" may include signaling by the network device or pre-defining, for example, a protocol definition. The "pre-defining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the application is not limited to a specific implementation manner thereof.

Reference to "saving" in the embodiments illustrated below may refer to saving in one or more memories. The one or more memories may be provided separately or may be integrated in an encoder or decoder, processor, or communication device. The one or more memories may also be provided separately in part, and integrated in the decoder, processor, or communication device. The type of memory may be any form of storage medium, and this application is not limited in this regard.

In the embodiments shown below, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, LTE protocols, 5G or NR protocols, and related protocols applied in future communication systems, which are not limited in this application.

In the embodiments shown below, "and/or" describing the association relationship of the association objects, means that there may be three relationships, for example, a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. "plurality" means two or more, and the like. Furthermore, for elements (elements) that appear in the singular forms "a," "an," and "the," it does not mean "one or only one" unless the context clearly dictates otherwise. For example, "a device" means a device for one or more of such devices. Further, at least one (at least one of),. The term "means one or any combination of subsequent association objects, e.g." at least one of a, B and C "includes a, B, C, AB, AC, BC, or ABC.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be appreciated that the method of transmitting data provided herein may be applicable to wireless communication systems. The method for transmitting data provided by the present application may be applicable to a communication between at least one network device and at least one terminal device, for example, the system 100 shown in fig. 1 or the system 200 in fig. 2. Alternatively, the method for transmitting data provided in the present application may be applicable to communication between at least two terminal devices. Such as the system 200 shown in fig. 2.

Fig. 5 is a schematic block diagram of a method 200 of transmitting data provided by an embodiment of the present application. As shown, the method 200 may be applied to V2X or D2D scenes, etc., and the method 200 may include steps 210, 220, each of which is described in detail below.

210, the terminal device obtains information of the resource pool 1 and the resource pool 2.

On a specific carrier, the resources can be configured into two parts according to the acquisition mode of the resources, and the two parts are marked as a resource pool 1 and a resource pool 2 for distinguishing. The network device may divide the carrier into two parts in the frequency domain or the time domain, that is, the network device may divide the resource pool 1 (e.g., may be denoted as a first resource pool) and the resource pool 2 (e.g., may be denoted as a second resource pool) in units (or units) of the time domain or the frequency domain.

The resources in the resource pool 1 belong to the resources allocated by the network equipment, and may be pre-allocated resources or resources allocated based on the request of the terminal equipment. In other words, if the terminal device is to transmit data using the resources of the resource pool 1, the resources may be acquired based on Mode1, e.g., the terminal device may request the resources from the network device, and the network device allocates the resources in the resource pool 1 to the terminal device so that the terminal device transmits data.

The resources on the resource pool 2 do not belong to the resources allocated by the network device, or the resources on the resource pool 2 may also be referred to as unreserved resources, in other words, if the terminal device is to use the resources of the resource pool 2 to transmit data, the resources may be acquired based on Mode 2. For example, the terminal device may perform a clear channel assessment in order for the terminal device to transmit data. Wherein, as described above, clear channel assessment includes channel-based detection (alternatively referred to as sensing) or energy-based detection (alternatively referred to as LBT).

The manner of dividing the resource pool 1 and the resource pool 2, and the manner in which the terminal device acquires the information of the resource pool 1 and the resource pool 2 will be described in detail below.

220, the terminal device sends the first data by using the resources in the resource pool 1; and/or the terminal equipment uses the resources in the second resource pool to send second data.

Optionally, the first data requires a higher transmission quality and the second data requires a lower transmission quality.

It should be understood that the first data and the second data are only names for distinction, and do not limit the protection scope of the embodiments of the present application.

In the embodiment of the present application, a service with a higher transmission quality requirement may be denoted as a first service, and configured on the resource pool 1, that is, the data of the first service is transmitted by using the resources in the resource pool 1; traffic with lower transmission quality requirements may be denoted as second traffic and configured to the resource pool 2, i.e. data of the second traffic is transmitted using resources in the resource pool 2. The transmission quality requirement can be determined according to a transmission quality requirement threshold, for example, a short-range service (proximity services, proSe) Packet Priority (PPPP) value, or a quality of service (quality of service, qoS) Flow Identifier (QFI) value, which reflects the service quality requirement.

For example, the first traffic may be a road safety type traffic, or the first traffic may be a road periodicity type traffic. As another example, the second service may be a non-road safety service, or the second service may be a non-periodic service.

It should be understood that the first service and the second service are only naming for distinction, and do not limit the protection scope of the embodiments of the present application.

The manner of dividing the resource pool 1 and the resource pool 2 will be described in detail below.

The network device may divide the resource pool 1 and the resource pool 2 in units (or units) of a time domain or a frequency domain, and hereinafter the manner of dividing the network device is described in units of the time domain, and it should be understood that the division in the frequency domain is similar, and will not be repeated herein.

Taking a time unit as a subframe and a time unit as a time slot as an example, two methods of dividing the resource pool 1 and the resource pool 2 by the network device by taking a time domain as a unit are introduced.

The network device may divide the resources into resource pool 1 and resource pool 2 by any of the following methods.

Method 1

The carrier resource is configured into two parts by taking a subframe (subframe) as a unit, wherein the resource pool 1 and the resource pool 2 comprise reserved resources or reserved subframe groups, and the resource pool 1 comprises unreserved resources or unreserved subframe groups.

As exemplified in connection with fig. 6. As shown in fig. 6, a specific radio frame (radio frame) includes two parts, one is a radio frame including a resource pool 2, namely, a radio frame 0 and a radio frame 4; the other part is a radio frame not containing the resource pool 2, i.e., a radio frame belonging to the resource pool 1, i.e., a radio frame 1, a radio frame 2, and a radio frame 3.

It should be understood that the specific radio frame is named for distinction only, and the name is not meant to limit the scope of the embodiments of the present application (e.g., it may be a subframe, a slot, or a symbol).

It should be further understood that the radio frame including the resource pool 2 indicates that the radio frame includes the resources in the resource pool 2, that is, the radio frame includes the unreserved subframes; a radio frame that does not contain the resource pool 2 indicates that the radio frame does not contain the resources in the resource pool 2, that is, the radio frame does not contain the unreserved subframes. And will not be described in detail below.

The carrier resource is configured into two parts by taking the subframe as a unit. As in the case of radio frame 0 and radio frame 4 in fig. 6, each of radio frame 0 and radio frame 4 includes a subframe of resource pool 2. Taking the example of the radio frame 0, the subframes 4, 5, 6 and 7 are configured as the subframes of the unreserved subframes or the resource pool 2, and the subframes 4, 5, 6 and 7 form an unreserved subframe group, that is, the subframes 4, 5, 6 and 7 belong to the resource pool 2; subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 are configured as subframes of a reserved subframe or resource pool 1, and subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 constitute a reserved subframe group, i.e., subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 belong to resource pool 1. In other words, the network device divides the radio frame 0 into two parts, one part is an unreserved subframe group consisting of the subframes 4, 5, 6, and 7, i.e., the resource pool 2, and the other part is a reserved subframe group consisting of the subframes 0, 1, 2, 3, 8, and 9, i.e., the resource pool 1.

It should be understood that, the above description is given taking the example that the subframes 4, 5, 6, and 7 form the resource pool 2, and the subframes 0, 1, 2, 3, 8, and 9 form the resource pool 1, which is not limited to this, and the resource pool 1 may include more subframes, and the resource pool 2 may also include more subframes.

Method 2

The carrier resource is configured into two parts by taking a slot (slot) as a unit, the resource pool 1 and the resource pool 2 are arranged, the resource pool 1 comprises reserved resources or reserved slot groups, and the resource pool 2 comprises unreserved resources or unreserved slot groups.

As exemplified in connection with fig. 7. As shown in fig. 7, a specific subframe includes two parts, one part is a subframe including a resource pool 2, namely a subframe 0 and a subframe 4; the other part is a subframe not containing the resource pool 2, namely, a subframe belonging to the resource pool 1, namely, a subframe 1, a subframe 2, and a subframe 3.

It should be understood that the specific sub-frames are only names for distinction, and the names thereof do not limit the protection scope of the embodiments of the present application (e.g., may be time slots or symbols).

It should also be understood that a subframe containing the resource pool 2 indicates that the subframe contains the resources in the resource pool 2, that is, the subframe contains an unreserved time slot; a subframe that does not contain resource pool 2 means that the subframe does not contain resources in resource pool 2, that is, the subframe does not contain unreserved slots.

The carrier resources are configured in two parts by taking time slots as units. As shown in fig. 7, subframe 0 and subframe 4 each include a slot of resource pool 2. Taking subframe 0 as an example, configuring time slot 0, time slot 1, time slot 2 and time slot 3 as time slots or unreserved time slots of a resource pool 2, wherein the time slots 0, 1, 2 and 3 form an unreserved time slot group, and the time slots 0, 1, 2 and 3 belong to the resource pool 2; the time slot 4, the time slot 5, the time slot 6 and the time slot 7 are configured as the time slot or the reserved time slot of the resource pool 1, and the time slot 4, the time slot 5, the time slot 6 and the time slot 7 form a reserved time slot group, and the time slot 4, the time slot 5, the time slot 6 and the time slot 7 belong to the resource pool 1. In other words, the network device divides the subframe 0 into two parts, one part is an unreserved time slot group consisting of time slot 0, time slot 1, time slot 2, and time slot 3, i.e. resource pool 2, and the other part is a reserved time slot group consisting of time slot 4, time slot 5, time slot 6, and time slot 7, i.e. resource pool 1.

It should be understood that, the above description is given by taking the example that the time slot 0, the time slot 1, the time slot 2, the time slot 3 form the resource pool 2, the time slot 4, the time slot 5, the time slot 6, and the time slot 7 form the resource pool 1 as examples, the application is not limited thereto, and the resource pool 1 may include more time slots, and the resource pool 2 may also include more time slots.

The manner in which the terminal device acquires the information of the resource pool 1 and the resource pool 2 in step 210 will be described below.

The terminal device may acquire information of the resource pool 1 and the resource pool 2 in any of the following ways.

In mode 1, the network device may transmit indication information for indicating a part of the resources (i.e., resource pool 1 or resource pool 2), and the terminal device may infer information of another part of the resources (i.e., resource pool 2 or resource pool 1) based on the indication information.

For example, the network device may send indication information for indicating the resource pool 1, from which the terminal device may determine the information of the resource pool 1 and infer the information of the resource pool 2. As another example, the network device may send indication information for indicating the resource pool 2, and the terminal device may determine the information of the resource pool 2 and infer the information of the resource pool 1 according to the indication information.

In mode 2, the network device transmits indication information for indicating the resource pool 1 and the resource pool 2, and the terminal device can determine the information of the resource pool 1 and the resource pool 2 according to the indication information.

For example, the network device transmits indication information to the terminal device, indicating the position of the subframe in the resource pool 1 and the position of the subframe in the resource pool 2, or indicating the position of the slot in the resource pool 2 and the position of the slot in the resource pool 2.

Alternatively, in the two modes, the indication information may be sent to the terminal device through separate signaling; alternatively, the indication information may be transmitted to the terminal device together with the configuration information. In one possible implementation, the network device may broadcast configuration information of resource pool 1 and resource pool 2 to all terminal devices within a cell.

Alternatively, the indication information may be transmitted on a subframe of the resource pool 1 or on a slot of the resource pool 1, and may be transmitted with a certain period.

The following mainly describes the above-described mode 1.

The information of the resource pool 1 and the resource pool 2 can be indicated by means of bit map (bitmap). The following description will be made in connection with the above two different cases.

Case 1: the carrier resource is configured into two parts by taking the subframe as a unit.

The specific radio frame is represented by a bitmap of M bits, the specific radio frame represents a radio frame containing the resource pool 2, and M bits represent M radio frames, wherein M is an integer greater than 0. Among the specific radio frames, a radio frame containing the resource pool 2 may be denoted by 1, and a radio frame not containing the resource pool 2 may be denoted by 0; alternatively, a radio frame containing the resource pool 2 may be denoted by 0, and a radio frame not containing the resource pool 2 may be denoted by 1.

The subframes belonging to the resource pool 2 in the radio frame are represented by a bitmap of N bits, where N represents N subframes, where N is an integer greater than 0. In the radio frame, it may be indicated by 1 that the subframe is a subframe in the resource pool 2, and by 0 that the subframe is not a subframe in the resource pool 2; alternatively, 0 may indicate that the subframe is a subframe in the resource pool 2, and 1 may indicate that the subframe is not a subframe in the resource pool 2.

As exemplified in connection with fig. 6. As shown in fig. 6, m= 5,N =10, and a radio frame allocation with a length of 50ms is represented by 5 bits. Assuming that radio frame 0 and radio frame 4 in a particular radio frame contain unreserved subframes (i.e., subframes in resource pool 2), the particular radio frame may be represented by a 5-bit bitmap.

In one possible implementation, 1 represents a radio frame containing resource pool 2, 0 represents a radio frame not containing resource pool 2, and then the specific radio frame may be denoted 10001. Accordingly, the terminal device determines, according to the representation 10001 of the specific radio frame, that radio frame 0 and radio frame 4 are radio frames including resource pool 2. The terminal device may infer that the remaining radio frames, i.e., radio frame 1, radio frame 2, and radio frame 3, are radio frames that do not include resource pool 2.

In yet another possible implementation, 0 represents a radio frame containing resource pool 2, 1 represents a radio frame not containing resource pool 2, and then the specific radio frame may be represented as 01110. Accordingly, the terminal device determines, based on the representation 01110 of the particular radio frame, that radio frame 0 and radio frame 4 are radio frames comprising resource pool 2. The terminal device may infer that the remaining radio frames, i.e., radio frame 1, radio frame 2, and radio frame 3, are radio frames that do not include resource pool 2.

Assuming that the subframes belonging to the resource pool 2 in the radio frame 0 or the radio frame 4 include the subframe 4, the subframe 5, the subframe 6, and the subframe 7, the subframes belonging to the resource pool 2 in the radio frame 0 or the radio frame 4 may be represented in a bitmap of 10 bits.

One possible implementation, where 1 indicates that the subframe belongs to resource pool 2 and 0 indicates that the subframe does not belong to resource pool 2, then for either radio frame 0 or radio frame 4 the subframe may be denoted as 0000111100. Accordingly, the terminal device determines that subframe 4, subframe 5, subframe 6, and subframe 7 belong to the resource pool 2, i.e., subframe 4, subframe 5, subframe 6, and subframe 7 are unreserved subframes, according to the representation 0000111100 of the radio frame 0 or the radio frame 4. And, the terminal device may infer that the subframes 0, 1, 2, 3, 8, and 9 in the radio frame 0 or the radio frame 4 do not belong to the resource pool 2, that is, the subframes 0, 1, 2, 3, 8, and 9 belong to the resource pool 1.

In yet another possible implementation, 0 indicates a resource pool 2 to which the subframe belongs, 1 indicates a resource pool 2 to which the subframe does not belong, and the subframe may be denoted as 1111000011 for radio frame 0 or radio frame 4. Accordingly, the terminal device determines that subframe 4, subframe 5, subframe 6, and subframe 7 belong to the resource pool 2, i.e., subframe 4, subframe 5, subframe 6, and subframe 7 are unreserved subframes, according to the representation 1111000011 of the radio frame 0 or the radio frame 4. And, the terminal device may infer that the subframes 0, 1, 2, 3, 8, and 9 in the radio frame 0 or the radio frame 4 do not belong to the resource pool 2, that is, the subframes 0, 1, 2, 3, 8, and 9 belong to the resource pool 1.

It should be understood that the above terminal device determines the information of the resource pool 2 according to the received information for indicating the resource pool 2, and deduces the information of the resource pool 1. The present application is not limited thereto. For example, the terminal device may determine the information of the resource pool 1 according to the received information, and then infer the information of the resource pool 2. In other words, the network device may send information indicating the resource pool 1, from which the terminal device determines the information of the resource pool 1 and deduces the information of the resource pool 2.

Case 2: the carrier resources are configured in two parts by taking time slots as units.

The specific subframes are represented by a bitmap of M bits, the specific subframes representing subframes containing resource pool 2, M bits representing M subframes, where M is an integer greater than 0. Of the specific subframes, a subframe containing resource pool 2 may be denoted by 1, and a subframe not containing resource pool 2 may be denoted by 0; alternatively, a subframe containing resource pool 2 may be denoted by 0, and a subframe not containing resource pool 2 may be denoted by 1.

The time slots belonging to the resource pool 2 in the subframe are represented by a bitmap of N bits, N bits representing N time slots, where N is an integer greater than 0. In the subframe, the time slot may be represented by 1 as a time slot of the resource pool 2, and by 0 as a time slot other than the time slot of the resource pool 2; alternatively, 0 may indicate that the slot is a slot of the resource pool 2, and 1 may indicate that the slot is not a slot of the resource pool 2.

As exemplified in connection with fig. 7. As shown in fig. 7, m= 5,N =8, and a specific subframe allocation case having a length of 5ms is represented by 5 bits. Assuming that the slots in subframe 0 and subframe 4 in a particular subframe contain resource pool 2, the particular subframe may be represented by a 5-bit bitmap.

In one possible implementation, 1 represents a subframe containing resource pool 2, 0 represents a subframe not containing resource pool 2, and then the specific subframe may be denoted 10001. Accordingly, the terminal device determines, according to the representation 10001 of the specific subframe, that subframe 0 and subframe 4 are subframes including the resource pool 2. And, the terminal device may infer that the remaining subframes, namely, subframe 1, subframe 2, and subframe 3 are subframes that do not contain resource pool 2.

In yet another possible implementation, 0 represents a subframe containing a slot of resource pool 2, 1 represents a subframe not containing resource pool 2, and then the specific subframe may be represented as 01110. Accordingly, the terminal device determines, according to the representation 01110 of the specific subframe, that subframe 0 and subframe 4 are subframes including resource pool 2. And, the terminal device may infer that the remaining subframes, namely, subframe 1, subframe 2, and subframe 3 are subframes that do not contain resource pool 2.

Assuming that the slots belonging to the resource pool 2 in the subframe 0 or the subframe 4 include the slot 0, the slot 1, the slot 2, and the slot 3, the subframe 0 or the subframe 4 may be represented in an 8-bit bitmap manner.

One possible implementation, 1 indicates that the slot is a slot of resource pool 2, 0 indicates that the slot is not a slot of resource pool 2, and then for subframe 0 or subframe 4, the slot may be indicated as 11110000. Correspondingly, the terminal device determines that the time slot 0, the time slot 1, the time slot 2 and the time slot 3 belong to the resource pool 2 according to the representation 11110000 of the subframe 0 or the subframe 4, and the time slot 0, the time slot 1, the time slot 2 and the time slot 3 are unreserved time slots. And, the terminal device may infer that the time slot 4, the time slot 5, the time slot 6, and the time slot 7 in the subframe 0 or the subframe 4 belong to the resource pool 1, and that the time slot 4, the time slot 5, the time slot 6, and the time slot 7 belong to the reserved time slots.

In yet another possible implementation, 0 indicates that the slot is a slot of resource pool 2, 1 indicates that the slot is not a slot of resource pool 2, and then for subframe 0 or subframe 4, the slot may be denoted as 00001111. Correspondingly, the terminal device determines that the time slot 0, the time slot 1, the time slot 2 and the time slot 3 belong to the resource pool 2 according to the representation 00001111 of the subframe 0 or the subframe 4, and the time slot 0, the time slot 1, the time slot 2 and the time slot 3 are unreserved time slots. And, the terminal device may infer that the time slot 4, the time slot 5, the time slot 6, and the time slot 7 in the subframe 0 or the subframe 4 belong to the resource pool 1, and the time slot 4, the time slot 5, the time slot 6, and the time slot 7 are reserved time slots.

It should also be understood that the specific subframes mentioned in the above two cases are merely exemplary illustrations, and the present application is not limited thereto.

The process by which the terminal device performs clear channel assessment on resource pool 1 is described in detail below. For ease of understanding, the terminal device performs LBT (or referred to as energy-based detection, hereinafter collectively referred to as LBT) and sensing (or referred to as channel-based detection, hereinafter collectively referred to as sensing) on the resource pool 1, respectively, for example.

1. The terminal device performs LBT on resource pool 1.

As exemplarily described in connection with fig. 8. Suppose resource pool 2 comprises: subframe 1, subframe 2, subframe 3, subframe 4, subframe 5, subframe 6, subframe 7, and subframe 8, the resource pool 1 includes: subframe 0 and subframe 9. Taking terminal equipment a as an example, terminal equipment a starts LBT interception at subframe 1, and since subframe 9 does not belong to resource pool 2, there are at most 8 subframes, namely subframes 1 to 8, which can transmit data. In other words, terminal equipment a starts LBT from the position of subframe 1, and the longest transmission duration of terminal equipment a is 8 subframes, namely subframes 1 to 8. Assuming that one subframe is 1ms, the longest transmission duration of terminal device a is 7ms. Taking the terminal equipment B as an example, the terminal equipment B starts LBT interception at the subframe 7, and since the subframe 9 does not belong to the resource pool 2, there are at most 2 subframes, namely, subframes 7 to 8, which can transmit data. In other words, when the terminal equipment B starts LBT from the position of the subframe 7, the longest transmission duration of the terminal equipment B is 2 subframes, i.e., subframes 7 to 8. Assuming that one subframe is 1ms, the longest transmission duration of the terminal device B is 2ms.

It should be noted that, in the embodiment of the present application, the terminal device performs idle channel estimation at the subframe i, which may mean that the terminal device starts idle channel estimation at the starting position of the subframe i, or that the terminal device starts idle channel estimation at the middle position of the subframe i, or that the terminal device starts idle channel estimation at any position of the subframe i, which is not limited in this embodiment of the present application. Where i=0, 1,2,3, … …,9, … …. For example, taking the idle channel assessment as the LBT, the terminal device starts LBT at the start position of the subframe i, which may mean that the terminal device starts LBT at the middle position of the subframe i, or that the terminal device starts LBT at any position of the subframe i, which is not limited in this embodiment of the present application.

Before the terminal device performs LBT, a random number X is randomly generated from 0 to T according to a contention window parameter T (or a detection time window T, which is referred to above and not described herein), which is configured by the network device, and the terminal device detects at least X idle slots (having a specific time length, and specific data has a system configuration, for example, may be 16 us) before acquiring permission to transmit data. The random number X is a parameter related to LBT, and is referred to as an LBT parameter in this application for brevity.

Alternatively, the LBT parameter may be associated with a maximum transmission duration, i.e., the LBT parameter may be associated with the number of remaining subframes of the resource pool 2 (or the number of subframes of the remaining resource pool 2). For example, the smaller the number of remaining subframes of the resource pool 2, i.e. the shorter the remaining time or the shortest maximum transmission duration, the smaller the parameter T.

If the terminal device generates the LBT parameter only according to the contention window parameter T, that is, randomly generates a random number X from 0 to T, the LBT time may be too long, resulting in a relatively short data transmission time. Such as terminal device B in fig. 8. Thus, by associating the LBT parameter with the maximum transmission duration, the above-described problem can be avoided.

Optionally, in the process that the terminal device performs LBT, when the subframe boundary of the resource pool 2 is reached, it is determined whether to stop LBT or suspend LBT according to the remaining subframe number or the maximum transmission duration of the resource pool 2.

Specifically, as can be seen from the above, resource pool 1 and resource pool 2 are adjacent, i.e. the subframes of resource pool 2 have boundaries. In the process that the terminal device performs LBT, when reaching the boundary of the subframe of the resource pool 2, if the parameter X of LBT is still greater than 0 (i.e. no channel is acquired), i.e. no idle channel is currently acquired, the terminal device may take any one of the following methods.

Method 1: the LBT is stopped directly and the random number X is regenerated, and the LBT is performed again.

In the LBT process of the terminal device, when the boundary of the subframe of the resource pool 2 is reached, if X is still greater than 0, i.e. no idle channel is currently acquired, the LBT may be directly stopped. When the next sub-frame of the resource pool 2 starts, the random number X is regenerated and LBT is performed.

Method 2: the LBT is stopped directly and the LBT is resumed along with the previously generated random number X.

In the LBT process of the terminal device, when the boundary of the subframe of the resource pool 2 is reached, if X is still greater than 0, i.e. no idle channel is currently acquired, the LBT may be directly stopped. When the next subframe of the resource pool 2 starts, the LBT is resumed using the M generated before.

Method 3: the LBT is suspended (or hung up) until the next subframe of resource pool 2 starts, and the LBT is continued.

In the LBT process of the terminal device, when reaching the boundary of the subframe of the resource pool 2, if X is still greater than 0, i.e. no idle channel is currently acquired, the LBT may be suspended or suspended. Wait until the start of the subframe of the next resource pool 2, and continue with the LBT that was suspended or hung before.

Method 4: whether to suspend the LBT is determined according to the GAP.

The interval, which may also be referred to as a time interval or a suspension interval, is an interval when the boundary of the subframe of the resource pool 2 is reached to the beginning of the subframe of the next resource pool 2 in the process that the terminal device performs LBT. It can also be understood that if LBT is to be suspended, the interval from suspending LBT to the start of the subframe of the next resource pool 2.

In the LBT procedure of the terminal device, when reaching the boundary of the subframe of the resource pool 2, if X is still greater than 0, i.e. no idle channel is currently acquired, the time (i.e. interval) when the LBT will be suspended is calculated. If the interval is smaller than the preset threshold, the method 3 can be adopted, namely, the LBT is suspended; if the interval is greater than or equal to the preset threshold, method 1 or method 2 may be employed as described above. The preset threshold may be preset, or a protocol may be predefined, which is not limited in this embodiment of the present application. The benefits of doing so may address, for example, the following scenarios: when GAP is too long, the distance the vehicle travels is long, and previous LBT results cannot be referenced. Alternatively, in some scenarios, such as, for example, assisted or advanced driving assistance systems, intelligent driving, intelligent networked driving, etc., the length of the GAP may be associated with the vehicle, e.g., the higher the vehicle speed, the smaller the GAP, the lower the vehicle speed, the greater the GAP.

2. The terminal device performs sending on the resource pool 1.

When the terminal device performs sending on the resource pool 1, the detection time window may be a determined value (for example, x=1s) or a channel selection time window (for example, y=5ms), or the time of the detection time window may be associated with the maximum transmission duration, that is, X or Y may be associated with the remaining number of subframes of the resource pool 2 (or the remaining number of subframes of the resource pool 2). For example, the smaller the number of remaining subframes of the resource pool 2, i.e. the shorter the remaining time or the shortest maximum transmission duration, the smaller the parameters X and/or Y.

Optionally, in the sending process of the terminal device, when the subframe boundary of the resource pool 2 is reached, determining whether to stop sending or suspend according to the remaining subframe number or the maximum transmission duration of the resource pool 2.

Specifically, as can be seen from the above, resource pool 1 and resource pool 2 are adjacent, i.e. the subframes of resource pool 2 have boundaries. In the sending process of the terminal device, when the boundary of the subframe of the resource pool 2 is reached, if the parameter Y is still greater than 0 (i.e. no channel is acquired), i.e. no idle channel is currently acquired, the terminal device may take any of the following methods.

Method 1: the sending process is directly stopped, and then the sending process is carried out again.

In the sending process of the terminal equipment, when the boundary of the sub-frame of the resource pool 2 is reached, if X is still greater than 0, that is, no idle channel is currently acquired, the channel detection process can be directly stopped. When the next sub-frame of the resource pool 2 starts, the sending process is restarted.

Method 2: the send process is suspended (or hung up) until the next sub-frame of resource pool 2 starts, and the send process is continued.

In the process of sending by the terminal device, when the boundary of the subframe of the resource pool 2 is reached, if X is still greater than 0, that is, no idle channel is currently acquired (or channel availability determination cannot be performed), the sending process may be suspended or suspended. Wait until the next sub-frame of resource pool 2 begins, and continue with the previously suspended or suspended send process.

Method 3: whether to suspend the sending process is determined according to the GAP.

The interval, which may also be referred to as a time interval or a suspension interval, is an interval from when the boundary of the subframe of the resource pool 2 is reached to when the subframe of the next resource pool 2 starts in the process of sending by the terminal device. It can also be understood that if the sending process is to be suspended, the interval from the suspension of the sending process to the start of the subframe of the next resource pool 2.

In the process of sending by the terminal device, when the boundary of the sub-frame of the resource pool 2 is reached, if X is still greater than 0, i.e. no idle channel is currently acquired, the time (i.e. interval) when sending will be suspended is calculated. If the interval is smaller than the preset threshold, the method 2 can be adopted, namely, the sending is suspended; if the interval is greater than or equal to the preset threshold, method 1 described above may be employed. The preset threshold may be preset, or a protocol may be predefined. The embodiments of the present application are not limited in this regard. The benefits of doing so may address, for example, the following scenarios: when GAP is too long, the distance the vehicle travels is far, and the previous sensing result cannot be used as a reference. Alternatively, in some scenarios, such as, for example, assisted or advanced driving assistance systems, intelligent driving, intelligent networked driving, etc., the length of the GAP may be associated with the vehicle, e.g., the higher the vehicle speed, the smaller the GAP, the lower the vehicle speed, the greater the GAP.

LBT is performed with the terminal device, as exemplified in connection with fig. 9. In fig. 9, it is assumed that carrier resources are configured in two parts in units of subframes. Fig. 9 shows two cases: case a and case B.

Case a is a case where the interval is less than a preset threshold.

In case a, it is assumed that subframe 0, subframe 1, subframe 2, subframe 3, subframe 7, subframe 8, and subframe 9 belong to the subframes of resource pool 2, and subframe 4, subframe 5, and subframe 6 belong to the subframes of resource pool 1. When the terminal device calculates an interval (i.e., LBT suspension interval) after subframe 3LBT, the interval is determined to be 3 subframes, i.e., subframes 4 to 6. As shown in case a of fig. 9, assuming that the interval is smaller than the preset threshold, i.e. the duration of 3 subframes is smaller than the preset threshold, the above method 3 may be adopted, i.e. the LBT is suspended, and the terminal device continues the LBT procedure until the next subframe of the resource pool 2 starts, i.e. when the subframe 7 is to be reached. Assuming that the terminal device LBT is successful at subframe 8, i.e. gets an idle channel, data transmission starts from subframe 8. The subframes that can be occupied for data transmission are 3 subframes, namely subframe 8, subframe 9, and subframe 0.

Case B is where the interval is greater than or equal to a preset threshold.

In case B, it is assumed that subframe 0, subframe 7, subframe 8, and subframe 9 belong to subframes of resource pool 2, and subframe 1, subframe 2, subframe 3, subframe 4, subframe 5, and subframe 6 belong to subframes of resource pool 1. When the terminal device calculates an interval (i.e., LBT suspension interval) after subframe 0LBT, the interval is determined to be 6 subframes, i.e., subframes 1 to 6. As shown in case B in fig. 9, assuming that the interval is greater than or equal to the preset threshold, i.e. the time period of 6 subframes is greater than or equal to the preset threshold, the above-mentioned method 1 or method 2 may be adopted, and the terminal device re-LBT may wait until the next subframe of the resource pool 2 starts, i.e. when the subframe 7 is to be reached. The terminal device re-performs LBT at subframe 7, and starts data transmission from subframe 8, assuming that the terminal device has successfully LBT at subframe 8, i.e. obtained an idle channel. The subframes that can be occupied for data transmission are 3 subframes, namely subframe 8, subframe 9, and subframe 0.

Optionally, in the embodiment of the present application, the terminal device may further use the resources on the resource pool 2 to send the data of the first service.

The terminal device obtains the resources for sending data from the resource pool 1, where the resources obtained by the terminal device may be based on base station scheduling, pre-configuration, or based on the existing sending mechanism (that is, a mode capable of reserving resources for sending data), and the embodiment of the present application is not limited in this regard.

Alternatively, for traffic configured on resource pool 1, or for some traffic, such as traffic with higher time-critical requirements, higher priority, or more urgent, the terminal device may occupy or use the resources of resource pool 2 for transmission.

Specifically, when the terminal device needs to occupy the resources of the resource pool 2 to transmit service data, the terminal device or the network device may first send the SCI to indicate the length of the scheduled resource. By sending SCI to the terminal device to indicate information such as scheduling duration, the detection time of the terminal device can be shortened, and related scheduling information can be indicated to the transmitting UE by the network device, and the transmitting UE gives the receiving UE again.

As exemplarily described in connection with fig. 10. As shown in fig. 10, it is assumed that the carrier resources are configured in two parts in units of subframes, subframe 2 and subframe 3 belong to the subframes of the resource pool 1, and subframe 4, subframe 5, subframe 6, and subframe 7 belong to the subframes of the resource pool 2.

As shown in fig. 10, the network device transmits SCI in subframe 3, and may indicate the length of the schedule using a symbol length indication value (symbol length indication value, SLIV). The network device sends the SCI in the subframe 3, which may be that the network device sends the SCI in the starting position of the subframe 3, or that the network device sends the SCI in any position of the subframe 3, which is not limited in this embodiment of the present application.

The terminal equipment performing channel interception on the subframe of the resource pool 2 receives the corresponding SCI and demodulates and decodes the corresponding SCI so as to start the time of LBT and make the time-frequency domain bandwidth of LBT.

The process in which a communication device receives a signal on a certain channel in order to detect whether the channel is free (or alternatively, clear channel assessment) may be referred to as channel listening. Specifically, if the communication device determines whether the channel is idle through signal detection, and if no specific signal is detected, the channel is considered to be idle, or no signal transmission of other communication devices is heard; in the event that a particular signal is detected, the channel is considered busy, or alternatively, the signaling of the other communication device is heard. If the communication equipment determines whether the channel is idle through energy detection, and if the received or detected energy is lower than a certain preset threshold value, the channel is considered to be idle, or the signal transmission of other communication equipment is not heard; and when the received or detected energy is higher than a preset threshold value, the channel is considered to be busy, or the signal transmission of other communication equipment is heard.

The channel interception is performed on the subframes of the resource pool 2, which can be understood as interception of the unreserved subframes by the terminal device.

Optionally, the interval between the time when the network device transmits the SCI and the start of the subframe of the resource pool 2 is less than or equal to a preset third threshold. The preset third threshold may be preset, for example, predefined by a protocol or preconfigured by a network device, which is not limited in this embodiment of the present application.

The time when the network device sends the SCI may be just before the start of the sub-frame of the resource pool 2, for example within a few time slots (e.g. 1 time slot) before the start of the SCI. For example, taking fig. 10 as an example, the time when the network device sends the SCI may be a position before starting on the subframe of the resource pool 2 (i.e. the subframe 4), such as the position of the subframe 3, so that the terminal device only needs to start monitoring the SCI at the subframe 3. In this way, that is, the interval between the time when the network device transmits the SCI and the start of the subframe of the resource pool 2 is less than or equal to the preset third threshold, the power consumption caused by blind detection of the SCI by the terminal device can be reduced.

Optionally, the interval between the time when the network device transmits the SCI and the start of the subframe of the resource pool 2 is greater than or equal to a preset fourth threshold.

For simplicity, the interval between the time the network device transmits the SCI and the start of the subframe of resource pool 2 is denoted as the scheduling interval, as shown in fig. 10. The scheduling interval is greater than or equal to a preset fourth threshold, where the preset fourth threshold may be preset, for example, predefined by a protocol or preconfigured by a network device, which is not limited in this embodiment of the present application. For example, the scheduling interval is greater than or equal to N2; as another example, assume that the current subcarrier spacing (subcarrier spacing, SCS) is 15KHz and the scheduling interval is not less than 3 symbols. In this way, that is, the interval between the time when the network device transmits the SCI and the start of the subframe of the resource pool 2 is greater than or equal to the preset fourth threshold, it is possible for the terminal device to have a sufficiently long time to set the LBT parameter.

Optionally, the interval between the frequency domain location of the network device sending SCI and the beginning of the frequency domain start location of the resource pool 2 is smaller than or equal to a preset fifth threshold. The preset fifth threshold may be preset, for example, predefined by a protocol or preconfigured by a network device, which is not limited in this embodiment of the present application.

The network device may send the frequency domain location of the SCI by monitoring the SCI at a location before the beginning of the frequency domain starting location of the resource pool 2, for example, within a few frequency domain units (e.g., within 1 subcarrier, etc.) before the beginning. In this way, that is, the interval between the frequency domain position of the SCI sent by the network device and the beginning of the frequency domain starting position of the resource pool 2 is smaller than or equal to the preset fifth threshold, the power consumption caused by blind detection of the SCI by the terminal device can be reduced.

Optionally, the interval between the frequency domain location of the network device sending SCI and the beginning of the frequency domain start location of the resource pool 2 is greater than or equal to a preset sixth threshold.

For simplicity, the interval between the frequency domain location where the network device sends the SCI and the beginning of the frequency domain start location of the resource pool 2 is denoted as the scheduling interval. In this way, that is, the interval between the frequency domain position of the network device transmitting SCI and the frequency domain start position of the resource pool 2 is greater than or equal to the preset sixth threshold, the terminal device can be enabled to set the LBT parameter.

Two specific examples are described below in connection with fig. 11 and 12.

Fig. 11 is a schematic interaction diagram illustrating a method 300 of transmitting data provided by an embodiment of the present application from a device interaction perspective. As shown, the method 300 may include steps 310 through 350, each of which is described in detail below.

The network device sends the resource configuration information 310.

Accordingly, the terminal device and the target device receive the resource configuration information. The target device is one or more terminal devices corresponding to the data to be transmitted of the terminal device, namely one or more terminal devices for receiving the data to be transmitted of the terminal device. Alternatively, the target device may be one or more groups of terminal devices or one or more groups for receiving target data, i.e. the terminal devices in the group or group each receive data to be transmitted of the terminal device.

The network device may divide the resource into two parts in units (or units) of time domain or frequency domain, and the resource pool 1 and the resource pool 2 are described in the method 200, which is not described herein for brevity.

The network device is described by taking a subframe as a unit configuration as two parts.

Optionally, the resource configuration information includes information of radio frames and subframes. The information about the radio frames and subframes is as described in method 200 and is not described in detail herein for brevity.

Optionally, the resource configuration information includes a multiple access mode of the sidelink control channel. One possible implementation manner is that the resource pool 1 is SC-FDMA, the resource pool 2 is OFDMA, that is, the terminal device sends control channel information (SCI) and data channels of the sidelink, and a configured multiple access manner is adopted; alternatively, a multiple access scheme indicated for the side link shared data channel (PSSCH) can be added to the SCI cell.

Optionally, the resource configuration information includes resource allocation pattern information. For example, the resource acquisition Mode of the resource pool 1 is configured to be acquired based on Mode1, namely, a Mode of being distributed through network equipment; the resource acquisition Mode of the resource pool 2 is configured to be acquired based on Mode2, namely through channel idle detection or LBT mechanism, and the like.

Alternatively, the terminal device may receive the resource configuration information on the resource pool 1.

320, the terminal device connects the service to resource pool 1.

The terminal device may connect the service to the resource pool 1 according to the service connection rule configured by the network device.

And 330, the terminal equipment applies resources to the network equipment.

In other words, the terminal device applies for the resources in the resource pool 1 to the network device.

The terminal equipment sends request information to the network equipment, wherein the request information comprises at least one of the following information: the data buffer amount is the expected coverage distance of the data to be transmitted or the difference between the path loss value from the transmitting end to the receiving end, the path loss from the terminal equipment to the network equipment (simply called as the cell path loss), the service path loss (such as the side link path loss) and the cell path loss.

The path loss predicted value may also be referred to as a service path loss. When the terminal equipment sends data in a broadcasting mode, calculating service path loss according to a distance range which is expected to be covered by the service; when the terminal equipment sends data in a unicast mode, calculating the service path loss according to the distance between the terminal equipment and the target equipment; when the terminal equipment sends data in a multicast mode, the service path loss of the terminal equipment can be calculated according to the maximum terminal equipment path loss in the terminal equipment group.

340, the network device allocates resources for the terminal device.

Correspondingly, the terminal equipment acquires the resources allocated by the network equipment, wherein the resources are resources in the resource pool 1.

The network equipment distributes scheduling resource information to the terminal equipment according to the request information of the terminal equipment, wherein the distributed scheduling resource information comprises at least one of the following information: frequency domain information (e.g., number of PRBs or number of subchannels, etc.), time domain information (number of symbols or number of slots), number of time-slot aggregations (number of times traffic data is repeated over consecutive slots), control channels, and/or multiple access manner of traffic data (e.g., OFDMA or SC-FDMA).

When the multiple access mode is different from the multiple access mode when the resource pool is configured, the multiple access mode indicated by the network device can cover the multiple access mode when the resource pool is allocated.

The terminal device sends 350 data to the target device on the allocated resources.

The data may include control data and traffic data, among others. That is, the terminal device may transmit the related control data and service data according to the information allocated by the network device.

It should be noted that, when the network device configures only the multiple access mode of the side link physical control channel (PSCCH), the terminal device determines the multiple access mode of the data channel according to the coverage area and the transmission power condition, and indicates the multiple access mode in the control channel, and an example is shown in table 1 below.

TABLE 1

And the target equipment detects the control channel on the resource pool 1 according to the configured subframe information and the multiple access information, and receives and processes the service data.

Based on the technical scheme, the resources for transmitting the periodic service can be separated independently and are not influenced by the transmission of the non-periodic service, so that the transmission performance of data is improved.

Fig. 12 is a schematic interaction diagram illustrating a method 400 of transmitting data provided by an embodiment of the present application from a device interaction perspective. As shown, the method 400 may include steps 410 through 440, each of which is described in detail below.

The network device sends the resource configuration information 410.

The network device is described by taking a time slot as a unit and configuring the network device into two parts as an example.

Optionally, the resource configuration information includes information of subframes and slots. The information about the subframes and slots is as described in method 200 and is not described here in detail.

The resource configuration information includes information of subframes and slots, and does not include information of radio frames. When the subcarrier spacing is 15KHz, 1 sub-frame corresponds to 1 slot, and when the subcarrier spacing increases, the number of slots included in the sub-frame changes, as shown in table 2.

TABLE 2

Subcarrier spacing	slot length (millisecond)	The subframe contains the number of slots
			15KHz	1ms	1
30KHz	0.5ms	2
			60KHz	0.25ms	4
120KHz	0.125ms	8

As can be seen from table 2, when the number of subcarriers increases, the time unit is divided into more sub-divided resources, so that the transmission delay of the service can be reduced. Assuming that the network device only transmits information of the reserved time slot group (i.e. resource pool 1) to the terminal device, it can be designed in the following way:

1. the subframe containing the time slot of the resource pool 2 is expressed in a periodic mode, the subframe containing the time slot of the resource pool 2 can be called a specific subframe, the period can be expressed by T, and the subframe offset can be expressed by O;

2. the resource pool 2 slots within a particular subframe are denoted by SLIV. The method of SLIV is a representation method for representing the time domain length in the existing standard, and the calculation mode is as follows, assuming that 8 slots exist in each subframe:

If (L-1) is less than or equal to 4, then:

SLIV＝8*(L-1)+S；

otherwise:

SLIV＝8*(8-L+1)+(8-1-S)。

where SLIV may indicate a starting slot S of time domain resources relative to a start of a subframe,

s represents a starting time slot of time domain resources relative to the beginning of a subframe, and S is more than or equal to 0;

l represents the number of consecutive slots allocated from slot S, L is greater than 0, and L is less than (8-S).

As shown in fig. 7, taking a transmission period of 5ms (5 subframes), a subframe offset of 0, s=4, l=4 in a slot as an example, sliv=8× (L-1) +s=8×3+4=28.

420, the terminal device connects the service to resource pool 2.

And 430, the terminal equipment acquires the resource through the LBT.

Detection window long time calculation (contention window parameter setting): the method is introduced from two angles of parameter initial setting and parameter correction.

A. Parameter initial setting

The terminal device may be configured according to a protocol, calculate a detection duration, or detect the number of slots. It should be appreciated that the meaning of a time slot is different from the time slot of the data scheduled transmission, where the time slot is a unit of time, such as 16us. If the current protocol carries out the parameter determination of the number of the detection time slots according to the priority class and the service data transmission time length. Let the calculated output parameter be cw_l (contention window length). The rules for the contention window parameter setting are assumed as follows in table 3:

TABLE 3 Table 3

Channel access priority	CW _min,p	CW _max,p	Transmission time
				1	3	7	2ms
2	7	15	3ms
				3	15	63	8ms
4	15	1023	10ms

In the table, the channel access priority corresponds to transmission, and the parameter setting of the contention window is determined by the transmission time.

B. Parameter correction

Calculating the number of the current residual 'resource pool 2 time slots', and when the residual time is greater than a certain threshold value, not carrying out parameter correction, as for the table: the threshold may take the value: transmission time + maximum number of contention windows channel listening slot length. If it is less than a certain threshold, the detection time parameter setting is reduced until the condition is met.

Idle channel detection: if the transmission resource is acquired before the end of the sub-frame of the resource pool 2, the reading side performs data transmission on the acquired resource. Otherwise: judging the interval duration of the next sub-frame of the resource pool 2, if the interval duration is larger than a threshold, such as larger than 100ms, the related detection window length can be reset when the resource is detected on the next sub-frame of the resource pool 2, otherwise, the detection is continued.

And 440, the terminal equipment transmits data to the target equipment on the acquired resources.

Wherein the data comprises traffic data. Accordingly, the target device detects the control channel information on the resource pool 2 based on the received configuration information, according to the subframe information and the multiple access information according to the configuration, and the like, and receives and processes the service data.

Based on the technical scheme, the resource pool based on LBT or channel detection can be independently set, so that the time for detecting the channel is shortened, in addition, the problem that boundary resources are monitored based on LBT can be solved, and the transmission performance of data is improved.

The method for transmitting data provided in the embodiment of the present application is described in detail above with reference to fig. 5 to 12. The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 13 to 15.

Fig. 13 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown, the communication device 1000 may include a communication unit 1100 and a processing unit 1200.

In one possible design, the communication device 1000 may correspond to the terminal device in the above method embodiment, for example, may be a terminal device, or a chip configured in the terminal device. The communication unit 1100 is configured to perform the transceiver-related operation on the terminal device side in the above method embodiment, and the processing unit 1200 is configured to perform the processing-related operation on the terminal device in the above method embodiment.

In particular, the communication apparatus 1000 may correspond to the terminal devices in the methods 200, 300 and 400 according to the embodiments of the present application, and the communication apparatus 1000 may include units for performing the methods performed by the terminal devices in the methods 200, 300 and 400. And, each unit in the communication device 1000 and the other operations and/or functions described above are for implementing the respective flows of the methods 200, 300 and 400, respectively.

It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.

It should also be appreciated that when the communication apparatus 1000 is a terminal device, the communication unit 1100 in the communication apparatus 1000 may correspond to the transceiver 2020 in the terminal device 2000 illustrated in fig. 14, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 illustrated in fig. 14.

It should also be understood that when the communication device 1000 is a chip configured in a terminal apparatus, the communication unit 1100 in the communication device 1000 may be an input/output interface.

In another possible design, the communication apparatus 1000 may correspond to the network device in the above method embodiment, for example, may be a network device, or a chip configured in a network device. The communication unit 1100 is configured to perform the transceiver-related operations on the network device side in the above method embodiment, and the processing unit 1200 is configured to perform the processing-related operations on the network device in the above method embodiment.

In particular, the communication apparatus 1000 may correspond to the network devices in the methods 200, 300 and 400 according to embodiments of the present application, and the communication apparatus 1000 may include units for performing the methods 200, 300 and the network devices in the methods 300 in the methods 400. And, each unit in the communication device 1000 and the other operations and/or functions described above are for implementing the respective flows of the methods 200, 300 and 400, respectively.

It should also be appreciated that when the communication apparatus 1000 is a network device, the communication unit in the communication apparatus 1000 may correspond to the transceiver 3200 in the network device 3000 shown in fig. 15, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 3100 in the network device 3000 shown in fig. 15.

It should also be understood that when the communication apparatus 1000 is a chip configured in a network device, the communication unit 1100 in the communication apparatus 1000 may be an input/output interface.

Fig. 14 is a schematic structural diagram of a terminal device 2000 provided in an embodiment of the present application. The terminal device 2000 may be applied to a system as shown in fig. 1 or fig. 2, and perform the functions of the terminal device in the above-described method embodiment. As shown, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further comprises a memory 2030. Wherein the processor 2010, the transceiver 2002 and the memory 2030 may communicate with each other through an internal connection path, and transfer control and/or data signals, the memory 2030 is used for storing a computer program, and the processor 2010 is used for calling and running the computer program from the memory 2030 to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040 for transmitting uplink data and uplink control signaling output by the transceiver 2020 through a wireless signal.

The processor 2010 and the memory 2030 may be combined into a single processing device, and the processor 2010 is configured to execute program codes stored in the memory 2030 to implement the functions described above. In particular implementations, the memory 2030 may also be integrated within the processor 2010 or separate from the processor 2010. The processor 2010 may correspond to the processing unit of fig. 13.

The transceiver 2020 may correspond to the communication unit in fig. 13 and may be referred to as a transceiver unit. The transceiver 2020 may include a receiver (or receiver, receiving circuitry) and a transmitter (or transmitter, transmitting circuitry). Wherein the receiver is for receiving signals and the transmitter is for transmitting signals.

It should be understood that the terminal device 2000 shown in fig. 14 can implement the respective procedures related to the terminal device in the respective method embodiments described above. The operations and/or functions of the respective modules in the terminal device 2000 are respectively for implementing the corresponding flows in the above-described method embodiment. Reference is specifically made to the description in the above method embodiments, and detailed descriptions are omitted here as appropriate to avoid repetition.

The above-described processor 2010 may be used to perform the actions described in the previous method embodiments as being performed internally by the terminal device, while the transceiver 2020 may be used to perform the actions described in the previous method embodiments as being transmitted to or received from the network device by the terminal device. Please refer to the description of the foregoing method embodiments, and details are not repeated herein.

Optionally, the terminal device 2000 may also include a power supply 2050 for providing power to various devices or circuits in the terminal device.

In addition, in order to make the functions of the terminal device more complete, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, and the like, and the audio circuit may further include a speaker 2082, a microphone 2084, and the like.

Fig. 15 is a schematic structural diagram of a network device provided in the embodiment of the present application, for example, may be a schematic structural diagram of a base station. The base station 3000 may be applied to a system as shown in fig. 1 or fig. 2, and perform the functions of the network device in the above method embodiment. As shown, the base station 3000 may include one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 3100 and one or more baseband units (BBUs) (also referred to as Distributed Units (DUs)) 3200. The RRU 3100 may be referred to as a transceiver unit, corresponding to the communication unit 1200 in fig. 13. Alternatively, the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 3101 and a radio frequency unit 3102. Alternatively, the transceiving unit 3100 may include a receiving unit, which may correspond to a receiver (or receiver, receiving circuit), and a transmitting unit, which may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 3100 is mainly configured to receive and transmit a radio frequency signal and convert the radio frequency signal to a baseband signal, for example, to send indication information to a terminal device. The BBU 3200 portion is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 3100 and BBU 3200 may be physically disposed together, or may be physically disposed separately, i.e. a distributed base station.

The BBU 3200 is a control center of the base station, and may also be referred to as a processing unit, and may correspond to the processing unit 1100 in fig. 13, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing unit) may be configured to control the base station to perform the operation procedure with respect to the network device in the above-described method embodiment, for example, generate the above-described indication information, etc.

In one example, the BBU 3200 may be configured by one or more single boards, where the multiple single boards may support a single access radio access network (such as an LTE network) together, or may support radio access networks of different access systems (such as an LTE network, a 5G network, or other networks) respectively. The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure related to the network device in the above method embodiment. The memory 3201 and processor 3202 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be understood that the base station 3000 shown in fig. 15 is capable of implementing the various processes related to the network device in the various method embodiments described above. The operations and/or functions of the respective modules in the base station 3000 are respectively for implementing the corresponding flows in the above-described method embodiments. Reference is specifically made to the description in the above method embodiments, and detailed descriptions are omitted here as appropriate to avoid repetition.

The BBU 3200 described above may be used to perform actions described in the foregoing method embodiments as being implemented internally by a network device, while the RRU 3100 may be used to perform actions described in the foregoing method embodiments as being transmitted to or received from a terminal device by the network device. Please refer to the description of the foregoing method embodiments, and details are not repeated herein.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method of communicating in any of the method embodiments described above.

It should be understood that the processing means may be a chip. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated chip (application specific integrated circuit, ASIC), a system on chip (SoC), a central processing unit (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capability. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

According to the method provided by the embodiment of the application, the application further provides a computer program product, which comprises: computer program code, when run on a computer, causes the computer to perform the method of any of the embodiments of method 200, method 300, and method 400.

According to the method provided in the embodiments of the present application, there is further provided a computer readable medium storing a program code, which when executed on a computer, causes the computer to perform the method 200, 300 and 400 according to any one of the embodiments.

According to the method provided by the embodiment of the application, the application further provides a system, which comprises the one or more terminal devices and the one or more network devices.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When 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. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The network device in the above-mentioned respective apparatus embodiments corresponds entirely to the network device or the terminal device in the terminal device and method embodiments, the respective steps are performed by respective modules or units, for example, the steps of receiving or transmitting in the method embodiments are performed by the communication unit (transceiver), and other steps than transmitting and receiving may be performed by the processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between 2 or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting data, comprising:

the method comprises the steps that a first terminal device obtains information of a first resource pool and information of a second resource pool, resource network devices in the first resource pool are resources allocated to the terminal device, the resources in the second resource pool are resources obtained by the terminal device through idle channel assessment, and the first resource pool and the second resource pool are not overlapped;

the first terminal equipment sends first data to the second terminal equipment by using first resources in the first resource pool, wherein the first resources are resources allocated by the network equipment; and/or

The first terminal equipment uses second resources in the second resource pool to send second data to third terminal equipment, wherein the second resources are acquired through idle channel evaluation;

The second resource pool comprises a first time unit group and a second time unit group, the first resource pool comprises a third time unit group, the third time unit group is positioned between the first time unit group and the second time unit group, the third time unit group is adjacent to the first time unit group, and the third time unit group is adjacent to the second time unit group;

the method further comprises the steps of:

the first terminal equipment performs idle channel assessment in the first time unit group based on idle channel assessment parameters;

the first terminal equipment re-performs idle channel assessment in the second time unit group based on the idle channel assessment parameter or the re-determined idle channel assessment parameter under the condition that the first time unit group does not acquire the second resource;

and when the first terminal equipment does not acquire the second resource and the interval between the ending position of the first time unit group and the starting position of the second time unit group is larger than or equal to a preset first threshold value, carrying out idle channel assessment again on the second time unit group based on the idle channel assessment parameter or the redetermined idle channel assessment parameter.

2. The method according to claim 1, wherein the method further comprises:

the first terminal equipment receives indication information, wherein the indication information is used for indicating information of the first resource pool and/or information of the second resource pool;

the first terminal device obtains information of a first resource pool and information of a second resource pool, and the method comprises the following steps:

and the first terminal equipment acquires the information of the first resource pool and the information of the second resource pool according to the indication information.

3. The method according to claim 1, wherein the method further comprises:

the first terminal equipment receives side uplink control information SCI at a first time domain position and/or a first frequency domain position, wherein the SCI is used for indicating resources in the second resource pool;

the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value; or (b)

The interval between the first frequency domain position and the frequency domain starting position in the second resource pool is smaller than or equal to a preset fifth threshold value, and/or the interval between the first time domain position and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold value.

4. A method of transmitting data, comprising:

The method further comprises the steps of:

the first terminal equipment suspends idle channel assessment under the condition that the first time unit group does not acquire the second resource; and

the first terminal equipment continues to perform idle channel assessment in the second time unit group based on the idle channel assessment parameters;

and under the condition that the first time unit group does not acquire the second resource, and when the interval between the ending position of the first time unit group and the starting position of the second time unit group is smaller than a preset second threshold value, the first terminal equipment suspends idle channel assessment.

5. The method according to claim 4, wherein the method further comprises:

6. The method according to claim 4, wherein the method further comprises:

7. A method of transmitting data, comprising:

the network equipment divides a first resource pool and a second resource pool, wherein the resources in the first resource pool are the resources allocated by the network equipment for the terminal equipment, the resources in the second resource pool are the resources obtained by the terminal equipment through idle channel evaluation, and the first resource pool and the second resource pool are not overlapped;

The network equipment sends information of the first resource pool and/or information of the second resource pool;

the terminal equipment carries out idle channel assessment in the first time unit group based on idle channel assessment parameters;

the terminal equipment carries out idle channel assessment again in the second time unit group based on the idle channel assessment parameter or the redetermined idle channel assessment parameter under the condition that the first time unit group does not acquire second resources;

and when the terminal equipment does not acquire the second resource and the interval between the ending position of the first time unit group and the starting position of the second time unit group is larger than or equal to a preset first threshold value, re-performing idle channel assessment on the second time unit group based on the idle channel assessment parameter or the re-determined idle channel assessment parameter.

8. The method of claim 7, wherein the method further comprises:

the network device uses resource sending side uplink control information SCI in the first resource pool at a first time domain position and/or a first frequency domain position, wherein the SCI is used for indicating resources in the second resource pool;

the interval between the first time domain position and the time domain starting position in the second resource pool is smaller than or equal to a preset third threshold value, and/or the interval between the first time domain position and the time domain starting position in the second resource pool is larger than or equal to a preset fourth threshold value;

9. A method of transmitting data, comprising:

the terminal equipment suspends idle channel assessment under the condition that the first time unit group does not acquire second resources; and

the terminal equipment continues to perform idle channel assessment in the second time unit group based on the idle channel assessment parameters;

and under the condition that the first time unit group does not acquire the second resource, and when the interval between the ending position of the first time unit group and the starting position of the second time unit group is smaller than a preset second threshold value, the terminal equipment suspends idle channel assessment.

10. The method according to claim 9, wherein the method further comprises:

11. The method according to claim 1 or 4 or 7 or 9, wherein,

the first resource pool and the second resource pool are overlapped in the time domain and are not overlapped in the frequency domain; or,

the first resource pool and the second resource pool overlap in a frequency domain and do not overlap in a time domain.

12. A communication device, comprising:

a processing unit for executing a computer program stored in a memory to cause the apparatus to perform the method of any one of claims 1 to 3.

13. A communication device, comprising:

a processing unit for executing a computer program stored in a memory to cause the apparatus to perform the method of any one of claims 4 to 6.