CN111615192A

CN111615192A - Method and communication device for transmitting data

Info

Publication number: CN111615192A
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: 2020-09-01
Anticipated expiration: 2039-02-22
Also published as: CN111615192B; WO2020168946A1

Abstract

The application provides a method and a communication device for data transmission, which aim to shorten the time for terminal equipment to evaluate an idle channel, for example, in the scenes of driving assistance or advanced driving assistance systems, intelligent driving, intelligent networking driving and the like, and can also 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, a resource network device in the first resource pool is a resource distributed by the terminal device, a resource in the second resource pool is a resource obtained by the terminal device through idle channel evaluation, 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 a first resource in a first resource pool, wherein the first resource is a resource distributed by the network equipment; and/or the first terminal equipment sends second data to the third terminal equipment by using a second resource in the second resource pool, wherein the second resource is obtained through idle channel assessment.

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 and a communication apparatus for transmitting data.

Background

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

In V2X communication, multiple types of traffic are supported. For example, there is a security-related service that requires a relatively strict delay requirement; there are also non-secure types of traffic that require a lower delay requirement. As another example, there is a periodic service, the generation of which is predictable and sent periodically; there are also aperiodic services that produce less predictive, not periodic transmissions.

Then, how is the terminal device to transmit data for different types of services?

Disclosure of Invention

The application provides a data transmission method and a communication device, aiming to reduce the channel detection time and improve the data transmission performance.

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

The method can comprise the following steps: a first terminal device obtains information of a first resource pool and information of a second resource pool, wherein a resource network device in the first resource pool is a resource allocated to the terminal device, a resource in the second resource pool is a resource 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 second terminal equipment by using a first resource in the first resource pool, wherein the first resource is a resource allocated by the network equipment; and/or the first terminal equipment sends second data to third terminal equipment by using a second resource in the second resource pool, wherein the second resource is obtained through idle channel estimation.

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

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

Optionally, the second terminal device and the third terminal device may be the same terminal device or different terminal devices. The first terminal device may transmit data using resources in the first resource pool, and may also 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 cell group and a second time cell group, the first resource pool includes a third time cell group, the third time cell group is located between the first time cell group and the second time cell group, the third time cell group is adjacent to the first time cell group, and the third time cell group is adjacent to the second time cell group; the method further comprises the following steps: the first terminal equipment carries out idle channel assessment in the first time unit group based on the idle channel assessment parameters; and the first terminal equipment performs idle channel assessment again 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.

Based on the above technical solution, the terminal device may perform idle channel assessment again when the time unit group of the second resource pool starts based on the same idle channel assessment parameter or the re-determined idle channel assessment parameter, so as to solve the problem of monitoring the boundary resource based on the idle channel assessment.

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

With reference to the first aspect, in some implementation manners of the first 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, the first terminal device performs idle channel estimation again in the second time unit group based on the idle channel estimation parameter or the newly determined idle channel estimation 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 performing idle channel assessment on the frequency domain corresponding to the first frequency domain group.

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

With reference to the first aspect, in certain implementations of the first aspect, the second resource pool includes a first time cell group and a second time cell group, the first resource pool includes a third time cell group, the third time cell group is located between the first time cell group and the second time cell group, the third time cell group is adjacent to the first time cell group, and the third time cell group is adjacent to the second time cell group; the method further comprises the following steps: the first terminal equipment carries out idle channel assessment in the first time unit group based on the idle channel assessment parameters; the first terminal device 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 evaluate the idle channel in the second time unit group based on the idle channel evaluation parameter.

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

With reference to the first aspect, in some implementation manners of the first aspect, the first terminal device suspends idle channel assessment 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.

Based on the technical scheme, the terminal equipment can suspend the idle channel evaluation when certain conditions are met.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first terminal equipment receives 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 acquiring, by the first terminal device, information of the first resource pool and information of the second resource pool includes: 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 indicate information of the first resource pool only to the terminal device, and the terminal device may determine 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 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 implementations of the first aspect, the method further includes: the first terminal equipment receives sidelink 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, an interval between the first frequency domain position and the frequency domain starting position in the second resource pool is less than or equal to a preset fifth threshold, and/or an interval between the first time and the frequency domain starting position in the second resource pool is greater than or equal to a preset sixth threshold.

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 of the second resource pool, for example, may send an SCI to the terminal device to indicate information such as a 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 a 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 method comprises the steps that a network device divides a first resource pool and a second resource pool, wherein resources in the first resource pool are resources allocated to a terminal device by the network device, 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; and the network equipment sends the information of the first resource pool and/or the 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 evaluate the idle channel, the idle channel evaluation can be carried out on the second resource pool, the channel detection time is shortened, and the data transmission performance is improved. In addition, when the terminal device needs to transmit data by using the allocated resources, the data can be transmitted by using the resources in the first resource pool, thereby improving the data transmission performance. Therefore, the terminal equipment can acquire the resources corresponding to the terminal equipment according to different resource acquisition modes, so that the calculation amount of the terminal equipment is reduced, the data transmission performance can be 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 equipment transmits Sidelink Control Information (SCI) by using resources 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 the 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, and/or the interval between the first time and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold.

With reference to the first aspect or the second 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; or, the first resource pool and the second resource pool are overlapped in a frequency domain and are not overlapped in a time domain.

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

In a third aspect, a communications apparatus 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 the present application.

The device may include a communication unit and a processing unit, where the processing unit is configured to obtain information of a first resource pool and information of a second resource pool, where a resource network device in the first resource pool is a resource allocated to a terminal device, a resource in the second resource pool is a resource obtained by the terminal device through idle channel estimation, and the first resource pool and the second resource pool are not overlapped; the communication unit is configured to send first data to a second terminal device using a first resource in the first resource pool, where the first resource is a resource allocated by the network device; and/or the communication unit is configured to send second data to a third terminal device by using a second resource in the second resource pool, where the second resource is obtained through idle channel estimation.

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

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, based on the idle channel assessment parameter or the newly determined idle channel assessment parameter, the idle channel assessment is performed again in the second time unit group.

With reference to the third aspect, in certain 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 performing 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 cell group and a second time cell group, the first resource pool includes a third time cell group, the third time cell group is located between the first time cell group and the second time cell group, the third time cell group is adjacent to the first time cell group, and the third time cell group is adjacent to the second time cell group; the processing unit is further configured to: based on the idle channel assessment parameters, performing idle channel assessment in the first time unit group; suspending idle channel assessment when 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, in a case that the second resource is not acquired by the first time unit group, 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: the clear channel assessment is suspended.

With reference to the third aspect, in some 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 some implementations of the third aspect, the communication unit is further configured to: receiving sidelink control information, SCI, at a first time domain location and/or a first frequency domain location, the SCI 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, and/or the interval between the first time and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold.

In a fourth aspect, a communication device is provided. The apparatus may be a network device, or may also 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 a resource in the first resource pool is a resource allocated by the network device for the terminal device, a resource in the second resource pool is a resource obtained by the terminal device through idle channel estimation, and the first resource pool and the second resource pool are not overlapped; 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 some implementations of the fourth aspect, the communication unit is further configured to transmit sidelink control information SCI using resources in the first resource pool at a first time and/or a first frequency domain location, the SCI 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, 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.

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

In a fifth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of any one of the possible implementations of the first aspect and the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being 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 equipment. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

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

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

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

In a seventh aspect, a processor is provided, including: input circuit, output circuit and processing circuit. The processing circuitry is configured to receive signals via the input circuitry and to transmit signals via the output circuitry, such that the processor performs the method of the first or second aspect and any possible implementation 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 flip-flop, 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 signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

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

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as 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 will be appreciated that the associated data interaction process, for example, sending the indication information, may be a process of outputting the indication information from the processor, and receiving the capability information may be a process of receiving the input capability information from the processor. In particular, data output by the processor may be output to a transmitter and input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processing device in the above eighth aspect may be a chip, the processor may be implemented by hardware or may be implemented by 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 with the processor, located external to the processor, or stand-alone.

In a ninth aspect, there is provided a computer program product, the 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 any of the possible implementations of the first or second aspect and aspects described above.

A tenth aspect provides 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 any of the above-described first or second aspects and possible implementations of the first or second aspects.

In an eleventh aspect, a communication system is provided, which includes the foregoing 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 with embodiments of the present application;

fig. 3 shows a schematic diagram of V2X detecting a clear channel;

fig. 4 shows a schematic diagram of ambient traffic and aperiodic traffic acquisition resources;

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

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

FIG. 7 is a further schematic diagram of an indication resource suitable for use in a method of transmitting data according to an embodiment of the present application;

fig. 8 is a schematic diagram of performing LBT for a method of transmitting data suitable for use in an embodiment of the present application;

fig. 9 is a further schematic diagram of performing LBT for a method of transmitting data suitable for use in an embodiment of the present application;

fig. 10 is another schematic diagram of performing LBT for a method of transmitting data suitable for use in an embodiment of the present application;

FIG. 11 is a schematic interaction diagram of a method of transferring data as provided by yet another embodiment of the present application;

FIG. 12 is a schematic interaction diagram of a method of transferring data as provided in yet 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 solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: driving Assistance (ADAS) or Advanced Driver Assistance Systems (ADAS), intelligent driving (intelligent driving), intelligent network driving (intelligent network driving), future generation five (5G) systems or New Radio (NR), global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), long term evolution (long term evolution) systems, LTE Frequency Division Duplex (FDD) systems, UMTS systems, TDD systems, and so on. The technical solution of the embodiment of the present application may also be applied to device-to-device (D2D) communication, machine-to-machine (M2M) 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-aircraft (V2X), and X represents anything. For example, the V2X communication includes: vehicle to vehicle (V2V), vehicle to roadside infrastructure (V2I), vehicle to pedestrian (V2P) or vehicle to network (V2N), etc.

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

Fig. 1 is a 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 devices 121 to 123 shown in fig. 1. The network equipment and the terminal equipment can be both provided with a plurality of antennas, and the network equipment and the terminal equipment can communicate by using a multi-antenna technology.

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

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

It should be understood that, for convenience of understanding only, the network device 111 and the terminal devices 121 to 123 are schematically illustrated in fig. 1, but this should not limit the present application, and a greater number of network devices may also be included in the wireless communication system, and a greater or lesser number of terminal devices may also be included, and the same network device may communicate with different terminal devices, or different network devices may communicate with different terminal devices, which is not limited in the present application.

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, the demand for high data rate and user experience is increasing, and the demand for proximity services to understand and communicate with people or things around is increasing, so D2D technology is increasing. The application of the D2D technology can reduce the burden of a cellular network, reduce the battery power consumption of a terminal device, improve the data rate and well meet the requirement of proximity services. The D2D technology can allow a plurality of terminal devices supporting the D2D function to transmit and receive signals with or without a network infrastructure. In view of the characteristics and advantages of the D2D technology, a vehicle networking application scenario based on the D2D technology is provided. For example, under the network of LTE technology proposed by the 3rd generation partnership project (3 GPP), the car networking technology of V2X is proposed. The V2X communication refers to communication between the vehicle and anything outside, and includes communication of V2V, communication of V2P, communication of V2I, and communication of V2N. Among them, V2N is the most widely used form of car networking at present, and its main function is to make the vehicle pass through mobile network, connect to cloud server, use application functions such as navigation, amusement, theftproof that cloud server provided. V2V may be used for inter-vehicle information interaction and reminding, and the most typical application is for inter-vehicle anti-collision safety systems. V2I may be used as a vehicle that can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as the timing of traffic light signals. V2P may be used as a safety warning for pedestrians or non-motor vehicles on the road, etc.

As shown in fig. 2, the wireless communication system 200 includes a plurality of terminal devices, such as the terminal device 124 through the terminal device 126 in fig. 2. Communication may be made directly between end device 124 to end device 126. For example, terminal device 124 and terminal device 125 may transmit 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 (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a baseband unit (BBU), an Access Point (AP), a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), or a Transmission Reception Point (TRP) in a wireless fidelity (WIFI) system, etc., may also be 5G, such as NR, a NB in a system, or a TRP or a Transmission Point (TP), one or more antennas of a base station (eNB) in a system may also be included in a group of antennas, or a panel of a network may also be formed by a base station (NB), such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements the function of a Radio Resource Control (RRC) layer, a Packet Data Convergence Protocol (PDCP) layer, and the DU implements the function of a Radio Link Control (RLC), a Media Access Control (MAC), and a Physical (PHY) layer. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or the DU + CU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in a 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 understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user device, among others. 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 (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in telemedicine (remote), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a vehicle-mounted communication device, and the like. The embodiments of the present application do not limit the application scenarios.

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

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

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

To facilitate understanding of the embodiments of the present application, a few terms or expressions referred to in the present application will be briefly described below.

1. Transmission mode of V2X communication

The transmission method of V2X communication includes a broadcast method, a multicast method, and a unicast method.

The broadcasting mode is as follows: the sending end sends data in a broadcast mode, and all receiving ends can analyze Sidelink Control Information (SCI) and Sidelink Shared Channel (SSCH) information. In the sidelink (sidelink), the manner for ensuring that all terminal devices can analyze the control information may be: the control information data is not scrambled or uses a scrambling code known to all terminal devices.

The multicast mode is as follows: 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 known scrambling codes of all terminal devices are used, multicast Identification (ID) is added in the control information, the terminal devices of the control information are analyzed, and whether the data need to be received is confirmed by identifying the multicast ID.

Unicast (unicast) mode: the method supports a hybrid automatic repeat request (HARQ) process, a sending end determines whether to retransmit according to the feedback of a receiving end, and coding adjustment is carried out according to a channel fed back by the receiving end.

2. Traffic type of V2X communication

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

Road safety service: the system is related to traffic safety, the service requirement real-time performance is high, and the system is required to transmit as soon as possible, for example, an emergency brake signal sent by a front vehicle, vehicle lane change information, a front emergency traffic accident danger avoidance notification and the like.

Non-road security class service: 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, the traffic includes a secure type traffic (i.e., a security-related traffic) which has a relatively strict delay requirement, and also includes a non-secure type traffic which has a relatively low delay requirement. In V2X communication, it also includes periodic traffic (traffic generation predictability, periodic transmission) and aperiodic traffic (traffic generation predictability is weak, not periodic transmission).

3. Communication mode for V2X communication

In the V2X communication, the communication mode of the terminal device may include PC5 interface-based communication and Uu interface-based communication.

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

Based on the PC5 interface communication, which means that communication is performed by the PC5 interface technology, i.e., direct communication, V2X communication data is directly transmitted between terminal devices (V2X terminal devices), in other words, communication can be performed directly between terminal devices. The PC5 interface can be used under out of coverage (OOC) and In Coverage (IC), and authorized terminal devices transmit using the PC5 interface. The transmission link between the terminal device and the terminal device may also be referred to as a side link (sidelink) or a through link (side link).

4. Channel band for V2X communication

The channel frequency band for V2X includes the following two:

one is that the Uu interface and the terminal device share a frequency band, that is, a direct link between the terminal device and the terminal device, and the Uu interface between the terminal device and the network device share a frequency band in a time division or frequency division manner;

in another example, the single dedicated frequency band of V2X (e.g., the frequency point around 6G allocated in china, 20M spectrum), that is, the direct link between the terminal device and the terminal device is a single frequency band and is not shared with the Uu interface. The different systems can share the same signals, such as LTE-V2X and NR-V2X, and the embodiments of the present application are not limited thereto.

5. Sidelink control signal SCI

Which may also be referred to as side link control information. Here, a sidelink or Sidelink (SL) refers to a transmission link between terminal devices. In SL, data transmission between terminal devices is not relayed through a network device. Such as system 200 shown in fig. 2.

6. Multiple access system

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

(1) single-carrier frequency-division multiple access (SC-FDMA): the process of realizing SC-FDMA is an orthogonal frequency division multiplexing multiple access technical scheme (DFT-OFDM) of discrete fourier transform spread spectrum, which is a single carrier frequency division multiple access scheme for generating signals in a frequency domain, and has the greatest advantage of better peak-to-average ratio and reduced requirement on an uplink transmitter. Transform precoding (NR) may also be referred to as NR.

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

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

It should be understood that the foregoing is illustrative only and that the present application is not limited thereto.

7. Data or data information

In the embodiments of the present application, "data" or "data information" may be understood as bits generated after an information block is coded, or "data" or "data information" may be understood as modulation symbols generated after the information block is coded and modulated. Data or data information may be carried over time-frequency resources, which may include resources in the time domain and resources in the frequency domain. In the time domain, the time-frequency resource may include 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 include frequency-domain units or resource units.

One time domain unit (also referred to as a time unit) may be one symbol, or one mini-slot (mini-slot), or one slot (slot), or one subframe (subframe), where 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: the method can be used as a metering unit of the resource occupied by the resource in the time-frequency domain. In the embodiment of the present application, the resource unit may include, for example, a sub-channel bandwidth (sub-band), an RB, a resource block group (RB group, RBG) composed of one or more RBs, one or more RB pairs (RBpair), a half RB, 1/4 RBs, an RE group composed of one or more REs, and the like. 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 slot

In NR, a slot is a minimum scheduling unit of time. One slot format is to contain 14 OFDM symbols, and the Cyclic Prefix (CP) of each OFDM symbol is a normal CP (normal cyclic prefix). One slot format is to include 12 OFDM symbols, and the CP of each OFDM symbol is an extended cyclic prefix (extended CP). One slot format is to contain 7 OFDM symbols, with the CP of each OFDM symbol being a normal CP. The OFDM symbols in one slot may be all used for uplink transmission; can be used for downlink transmission; or one part can be used for downlink transmission, one part can be used for uplink transmission, and one part is reserved for no transmission. 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 considerations.

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 resource pool (or a default configured resource pool) configured by the network device (e.g., base station). Generally, V2X direct link transmission supports the following two modes:

mode 1(Mode 1): network device scheduling mode. The terminal device needs to be in a 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 direct link. Briefly, mode1 is based on the network device performing resource allocation and scheduling on the direct link.

Mode 2(Mode 2): the allocation of resources is not based on (Mode 1) scheduling or pre-configuration. The method mainly comprises the following steps:

(1) the terminal equipment selects the transmission resource of the straight-through link;

(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 act as a master terminal device, for example) schedules the direct links of other terminal devices.

For mode2, in order to acquire a transmission channel, the terminal device may perform idle channel estimation by any one of the following methods:

the method comprises the following steps: based on channel detection (otherwise known as sensing);

the method 2 comprises the following steps: based on energy detection (otherwise known as Listen Before Talk (LBT)).

The above two methods are briefly described below.

The method comprises the following steps: based on channel detection.

Based on the channel detection process (or called control channel detection based process), the current standard is called the sending process, and the main characteristics include: analyzing SCI on the control channel, wherein the purpose of the SCI is to acquire the occupation situation of the current channel (data channel and control channel) and the future occupation situation; the energy on the channels is calculated, the distance of the terminal equipment used by the channels is calculated, and in the case that no channel is available, the same channel is preferentially used by the terminal equipment far away from the channel. .

Parsing SCI on the control channel is based on the V2X traffic having a periodic basis, i.e. the terminal device listens for a detection time window of a certain length (e.g. 1 second). Parsing the SCI on the control channel, wherein the scheduling signaling comprises: the service period and the channels occupied by the service deduce which channels are occupied and which channels are idle in the next period of time from the monitoring time window.

After the detection time window is over, the terminal device deduces which time channels can be occupied, and the channel occupation and the data transmission time are not transmitted immediately, but a time is randomly selected to transmit 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 detecting a clear channel. As shown in fig. 3, it is assumed to include: channel 1, channel 2, channel 3, channel 4, channel 5, channel 6. And the terminal equipment determines that the following parameters are obtained by detecting SCI of each channel in a monitoring time window: channel 1, channel 2, channel 3 are already occupied and continue to be occupied at time 3 and time 4; channel 4, channel 5, channel 6 are not occupied within the monitoring time window. The terminal device can therefore conclude that channel 4, channel 5, channel 6 are available at

times

3 and 4.

The method 2 comprises the following steps: energy-based detection

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

The third generation partnership project (3 GPP) has evaluated four channel access mechanisms:

the first is the LBT-free listening mechanism: some regions and countries do not mandate the implementation of LBT mechanism on unlicensed frequency bands.

The second is no random backoff LBT: a frame with a fixed duration, including the channel occupancy time and the idle time, is used to perform a Clear Channel Assessment (CCA) before data transmission is to be performed. If the channel is idle, the data transmission is carried out in the following channel occupation time, otherwise, the data can not be transmitted in the whole frame period. The length of time to determine whether a signal is idle before a transmitting side transmits data is determined.

The third is random backoff LBT with fixed length contention window: and a frame structure with an unfixed frame period is adopted, and a mode based on load change is adopted. The contention window is fixed in length, and an extended CCA (ECCA) is used, so that data transmission can be started immediately when a channel is detected to be idle, otherwise, the contention window, that is, a fixed number of ECCA windows, is to be entered.

The fourth is random backoff 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 sending end may change the length of the contention window. In the generation and use of the contention window, that is, before the terminal device performs the LBT listening mechanism, a random number M (M is greater than or equal to 0 and M is less than or equal to N) is generated from 0 to N (N is a configured value, N is greater than 0), and each time 1 timeslot is listened to as a channel idle, M is decremented by one until M is decremented to 0.

The 3GPP adopts the fourth LBT sensing mechanism (LBT CAT4), that is, random backoff LBT of non-fixed length contention window, as the basis of the access mechanism of the unlicensed-assisted access (LAA) downlink including the Physical Downlink Shared Channel (PDSCH). The second type (LBTCAT2) is used for detecting the Demodulation Reference Signal (DRS) before channel transmission. The LBT listening mechanism can ensure that LTE networks and other networks coexist and compete fairly.

In the embodiment of the present application, the clear channel assessment at least includes the above method 1 and method 2. Both method 1 and method 2 need to check the channel usage within a certain window time. For example, the sending mechanism is based on detecting control information of a control channel, and the time length can be 1 second; the LBT mechanism is based on energy detection, the time length can be randomly determined, and for brevity, the time windows detected in the above method 1 or method 2 are collectively referred to as detection time windows. Regardless of the method 1 or the method 2, after the detection time window is over, whether a channel is available is determined, and if the channel is available, the channel can be used to transmit data.

The following is collectively denoted by clear channel assessment.

As can be seen from the above, the resource acquisition method may be based on either the network device allocation method or the terminal device 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 may 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 a, terminal B, terminal C, and terminal E are taken as examples for explanation, and are respectively denoted as UE a, UE B, UE C, and UE E for distinction. It is assumed that UE a, UE B, and UE C periodically transmit a service, in other words, data of the periodic service is transmitted by UE a, UE B, and UE C; UE E transmits non-periodic traffic, in other words, data of non-periodic traffic is transmitted by UE E. As shown in fig. 4, the carrier resources are divided into two dimensions, i.e., a frequency domain and a time domain, where the frequency domain includes: subband (subband)1, subband 2, subband 3, the time domain includes: 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 obtain service resources of corresponding parts 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. And when the transmitting end transmits the SCI, the transmitting end broadcasts the resource reservation message to other terminal equipment.

UE E sends aperiodic service, and after detecting the reserved resources of UE A, UE B and UE C, finds the vacant resources, for example, the frequency domain resources include sub-band 3, time domain resources T3 and T6. UE E needs to first send resource reservation information (frequency domain resource subband 3 and time domain resource T6) on frequency domain resource subband 3 and time domain resource T3, and send data on frequency domain resource subband 3 and time domain resource T6.

As can be seen from the above, for the UE E sending aperiodic traffic, it is necessary to detect a longer time of channel detection, so as to increase the power consumption of the terminal device, on one hand, increase the computation amount of the terminal device, and on the other hand, increase the time delay of the aperiodic traffic, which is not favorable for the data transmission performance.

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

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

In the embodiments shown below, the terms "network" and "system" are often used interchangeably, but those skilled in the art will understand their meaning. Information (information), signal (signal), message (message), channel (channel) may sometimes be mixed, it should be noted that the intended meaning is consistent when the distinction is not emphasized. "of", "corresponding", and "corresponding" may sometimes be used in combination, it being noted that the intended meaning is consistent when no distinction is made.

In this application, "for indicating" may include for direct indication and for indirect indication. When a certain indication information is described for indicating a, the indication information may be included to directly indicate a or indirectly indicate a, and does not mean that a is necessarily carried in the indication information.

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

In the embodiments illustrated below, "pre-acquisition" may include signaling by the network device or pre-defined, e.g., protocol definition. The "predefined" may be implemented by saving a corresponding code, table, or other means that can be used to indicate the relevant information in advance in the device (for example, including the terminal device and the network device), and the present application is not limited to a specific implementation manner thereof.

References 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 integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided separately, with a portion of the one or more memories being integrated into the decoder, the processor, or the communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

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

In the embodiments illustrated below, "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "plurality" means two or more, and other terms are analogous. Furthermore, for elements (elements) that appear in the singular form "a," an, "and" the, "they are not intended to mean" one or only one "unless the context clearly dictates otherwise, but rather" one or more than one. For example, "a device" means for one or more such devices. Still further, at least one (at least one of a).

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

It should be understood 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 is applicable to 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 by the application can be applied 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 for transmitting data according to an embodiment of the present application. As shown, the method 200 may be applied to a V2X or D2D scene, etc., and the method 200 may include

steps

210, 220, each of which is described in detail below.

And 210, the terminal equipment acquires the information of the resource pool 1 and the resource pool 2.

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

The resource in the resource pool 1 belongs to a resource allocated by the network device, and may be a resource allocated in advance, or may be a resource allocated based on a request of the terminal device. In other words, if the terminal device is to use the resource of resource pool 1 to transmit data, the resource can be obtained based on Mode1, e.g., the terminal device can request the network device for the resource, and the network device allocates the resource in resource pool 1 to the terminal device so that the terminal device can transmit data.

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

The following describes in detail the manner in which the resource pool 1 and the resource pool 2 are divided, and the manner in which the terminal device acquires the information of the resource pool 1 and the resource pool 2.

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

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 named for distinguishing and do not limit the 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 resource in the resource pool 1 is used to transmit data of the first service; the service with lower transmission quality requirement may be denoted as a second service, and configured on the resource pool 2, that is, the resource in the resource pool 2 is used to transmit data of the second service. The transmission quality requirement may be determined according to a transmission quality requirement threshold, for example, a ProSe Per-Packet Priority (PPPP) value, or a quality of service (QoS) flow identifier (QoS flow ID, QFI) value, which reflects a service quality requirement.

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

It should be understood that the first service and the second service are only names for distinguishing and do not limit the scope of the embodiments of the present application.

The way in which the resource pool 1 and the resource pool 2 are divided will be described in detail below.

The network device may divide the resource pool 1 and the resource pool 2 by using a time domain or a frequency domain as a unit (or as a unit), and hereinafter, a manner of dividing the network device is described by using the time domain as a unit, it should be understood that the division by the frequency domain is similar, and details are not described here.

Two methods for dividing a resource pool 1 and a resource pool 2 by using a time domain as a unit are introduced by taking a time unit as a subframe and a time unit as a time slot as examples.

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

Method 1

The carrier resources are configured into two parts, namely a resource pool 1 and a resource pool 2, with subframes (subframes) as units, wherein the resource pool 1 comprises reserved resources or reserved subframe groups, and the resource pool 2 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 part is a radio frame including resource pool 2, i.e., radio frame 0 and radio frame 4; the other part is radio frames that do not contain resource pool 2, i.e., radio frames belonging to resource pool 1, i.e., radio frame 1, radio frame 2, and radio frame 3.

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

It should also be understood that the radio frame containing resource pool 2 indicates that the radio frame contains the resources in resource pool 2, that is, the radio frame contains unreserved subframes; the radio frame not including the resource pool 2 indicates that the radio frame does not include the resources in the resource pool 2, that is, the radio frame does not include the unreserved subframes. And will not be described in detail below.

The carrier resources are configured into two parts by taking a subframe as a unit. As shown in fig. 6, radio frames 0 and 4, and

radio frames

0 and 4 each include subframes of resource pool 2. Taking a radio frame 0 as an example, configuring a subframe 4, a subframe 5, a subframe 6 and a subframe 7 as a non-reserved subframe or a subframe of the resource pool 2, wherein the subframe 4, the subframe 5, the subframe 6 and the subframe 7 form a non-reserved subframe group, that is, the subframe 4, the subframe 5, the subframe 6 and the subframe 7 belong to the resource pool 2; and configuring the subframe 0, the subframe 1, the subframe 2, the subframe 3, the subframe 8 and the subframe 9 as a subframe of a reserved subframe or a resource pool 1, wherein the subframe 0, the subframe 1, the subframe 2, the subframe 3, the subframe 8 and the subframe 9 form a reserved subframe group, namely the subframe 0, the subframe 1, the subframe 2, the subframe 3, the subframe 8 and the subframe 9 belong to the 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 subframe 4, subframe 5, subframe 6, and subframe 7, i.e., resource pool 2, and the other part is a reserved subframe group consisting of subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9, i.e., resource pool 1.

It should be understood that the foregoing has been described by taking subframe 4, subframe 5, subframe 6, and subframe 7 as the resource pool 2, and subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 as the resource pool 1, but the present application is not limited thereto, 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, namely a resource pool 1 and a resource pool 2, with a slot as a unit, wherein 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, the specific subframe includes two parts, one part is a subframe including resource pool 2, i.e., subframe 0 and subframe 4; the other part is a subframe not containing resource pool 2, i.e., a subframe belonging to resource pool 1, i.e., subframe 1, subframe 2, and subframe 3.

It should be understood that the specific subframes are named for distinguishing purposes only, and the names of the specific subframes do not limit the scope of protection of the embodiments of the present application (for example, the specific subframes may be slots or symbols).

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

The carrier resources are configured into two parts by taking a time slot as a unit. As shown in fig. 7 for

sub-frames

0 and 4,

sub-frames

0 and 4 each include a slot of resource pool 2. Taking subframe 0 as an example, time slot 0, time slot 1, time slot 2, and time slot 3 are configured as time slots or unreserved time slots of resource pool 2, time slot 0, time slot 1, time slot 2, and time slot 3 constitute an unreserved time slot group, i.e., time slot 0, time slot 1, time slot 2, and time slot 3 belong to 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 slots or reserved time slots of the resource pool 1, the time slot 4, the time slot 5, the time slot 6 and the time slot 7 form a reserved time slot group, namely 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 subframe 0 into two parts, one part is an unreserved slot group consisting of slot 0, slot 1, slot 2, and slot 3, i.e., resource pool 2, and the other part is a reserved slot group consisting of slot 4, slot 5, slot 6, and slot 7, i.e., resource pool 1.

It should be understood that the above description has been given by taking the example where the timeslot 0, timeslot 1, timeslot 2, and timeslot 3 constitute the resource pool 2, and the timeslot 4, timeslot 5, timeslot 6, and timeslot 7 constitute the resource pool 1, but the present application is not limited thereto, and the resource pool 1 may include more timeslots, and the resource pool 2 may also include more timeslots.

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

The terminal device may obtain the information of the resource pool 1 and the resource pool 2 in any one of the following manners.

In mode1, the network device may send indication information indicating a part of resources (i.e., resource pool 1 or resource pool 2), and the terminal device may deduce information of another part of resources (i.e., resource pool 2 or resource pool 1) according to the indication information.

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

In the mode2, the network device sends 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 sends indication information to the terminal device, indicating the position of the subframe in resource pool 1 and the position of the subframe in resource pool 2, or indicating the position of the slot in resource pool 2 and the position of the slot in resource pool 2.

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

Optionally, the indication information may be sent on a subframe of resource pool 1 or a time slot of resource pool 1, and may be sent at a certain period.

The following mainly describes the above mode 1.

The information of the resource pool 1 and the resource pool 2 can be indicated by means of a bitmap. The following description will be made in conjunction with the above two different cases.

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

And representing a specific radio frame by using a bitmap with M bits, wherein the specific radio frame represents the radio frame containing the resource pool 2, and the M bits represent M radio frames, and M is an integer greater than 0. In the specific radio frame, a radio frame containing resource pool 2 may be represented by 1, and a radio frame not containing resource pool 2 may be represented by 0; alternatively, a radio frame including resource pool 2 may be denoted by 0, and a radio frame not including resource pool 2 may be denoted by 1.

And representing the subframes belonging to the resource pool 2 in the radio frame by using a bitmap with N bits, wherein the N bits represent N subframes, and N is an integer greater than 0. In the radio frame, 1 may be used to indicate that the subframe is a subframe in

resource pool

2, and 0 may be used to indicate that the subframe is not a subframe in resource pool 2; alternatively, 0 may be used to indicate that the subframe is a subframe in

resource pool

2, and 1 may be used to indicate that the subframe is not a subframe in resource pool 2.

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

In one possible implementation, 1 indicates a radio frame containing

resource pool

2, and 0 indicates a radio frame not containing resource pool 2, then the specific radio frame may be represented as 10001. Accordingly, the terminal device determines that the radio frames 0 and 4 are the radio frames including the resource pool 2 according to the representation 10001 of the specific radio frame. Moreover, the ue may conclude 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 another possible implementation, 0 represents a radio frame with

resource pool

2, and 1 represents a radio frame without resource pool 2, then the specific radio frame may be denoted as 01110. Accordingly, the terminal device determines radio frame 0 and radio frame 4 as radio frames including resource pool 2 according to the representation 01110 of the specific radio frame. Moreover, the ue may conclude 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 resource pool 2 in radio frame 0 or radio frame 4 include subframe 4, subframe 5, subframe 6, and subframe 7, the subframes belonging to resource pool 2 in radio frame 0 or radio frame 4 may be represented by a 10-bit bitmap.

In one possible implementation, 1 indicates that the subframe belongs to resource

pool

2, and 0 indicates that the subframe does not belong to resource pool 2, then the subframe may be represented as 0000111100 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 resource pool 2 according to representation 0000111100 of radio frame 0 or radio frame 4, that is, subframe 4, subframe 5, subframe 6, and subframe 7 are unreserved subframes. Also, the terminal device may conclude that subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 in the radio frame 0 or radio frame 4 do not belong to resource pool 2, i.e., subframe 0, subframe 1, subframe 2, subframe 3, subframe 8, and subframe 9 belong to resource pool 1.

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

It should be understood that the terminal device determines the information of the resource pool 2 according to the received information 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 resource pool 1, from which the terminal device determines information of resource pool 1 and infers information of resource pool 2.

Case 2: the carrier resources are configured into two parts by taking a time slot as a unit.

And using M-bit bitmap to represent a specific subframe, wherein the specific subframe represents a subframe containing a resource pool 2, and the M-bit bitmap represents M subframes, wherein M is an integer greater than 0. In the specific subframe, a subframe containing resource pool 2 may be represented by 1, and a subframe not containing resource pool 2 may be represented by 0; alternatively, a subframe including resource pool 2 may be denoted by 0, and a subframe not including resource pool 2 may be denoted by 1.

And representing the time slot belonging to the resource pool 2 in the subframe by using a bitmap with N bits, wherein the N bits represent N time slots, and N is an integer greater than 0. In the subframe, 1 may indicate that the timeslot is a timeslot of

resource pool

2, and 0 may indicate that the timeslot is not a timeslot of resource pool 2; alternatively, 0 may indicate that the slot is a slot of

resource pool

2, and 1 may indicate that the slot is not a slot of resource pool 2.

As exemplified in connection with fig. 7. As shown in fig. 7, M is 5, N is 8, and 5 bits are used to indicate the specific subframe allocation with a length of 5 ms. Assuming that subframe 0 and subframe 4 in a specific subframe contain slots of resource pool 2, the specific subframe may be represented by a bitmap of 5 bits.

In one possible implementation, 1 indicates a subframe containing

resource pool

2, and 0 indicates a subframe not containing resource pool 2, the specific subframe may be designated as 10001. Accordingly, the terminal device determines subframe 0 and subframe 4 as subframes containing resource pool 2 according to the representation 10001 of the specific subframe. And, the terminal device may infer that the remaining subframes, 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, and 1 represents a subframe containing no slot of resource pool 2, then the specific subframe may be denoted as 01110. Accordingly, the terminal device determines subframe 0 and subframe 4 as subframes containing resource pool 2 according to the representation 01110 of the specific subframe. And, the terminal device may infer that the remaining subframes, subframe 1, subframe 2, and subframe 3, are subframes that do not contain resource pool 2.

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

In one possible implementation, 1 indicates that the slot is a slot of

resource pool

2, and 0 indicates that the slot is not a slot of resource pool 2, then the slot may be indicated as 11110000 for subframe 0 or subframe 4. Accordingly, the terminal device determines that slot 0, slot 1, slot 2, and slot 3 belong to resource pool 2 according to the indication 11110000 of subframe 0 or subframe 4, i.e., slot 0, slot 1, slot 2, and slot 3 are unreserved slots. And, the terminal device may conclude that slot 4, slot 5, slot 6, and slot 7 in subframe 0 or subframe 4 belong to resource pool 1, i.e., slot 4, slot 5, slot 6, and slot 7 belong to reserved 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 the slot may be represented as 00001111 for subframe 0 or subframe 4. Accordingly, the terminal device determines that slot 0, slot 1, slot 2, and slot 3 belong to resource pool 2 according to the representation 00001111 of subframe 0 or subframe 4, i.e., slot 0, slot 1, slot 2, and slot 3 are unreserved slots. And, the terminal device may conclude that slot 4, slot 5, slot 6, and slot 7 in subframe 0 or subframe 4 belong to resource pool 1, i.e. slot 4, slot 5, slot 6, and slot 7 are reserved slots.

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

The procedure for the terminal device to perform clear channel assessment on resource pool 1 is described in detail below. For the sake of understanding, the exemplary illustration is that the terminal device performs LBT (or referred to as energy-based detection, hereinafter collectively referred to as LBT) and sending (or referred to as channel-based detection, hereinafter collectively referred to as sending) on the resource pool 1, respectively.

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

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

It should be noted that, in this embodiment of the present application, the terminal device performs idle channel estimation in the subframe i, which may refer to that the terminal device starts to perform idle channel estimation at a start position of the subframe i, or that the terminal device starts to perform idle channel estimation at an intermediate position of the subframe i, or that the terminal device starts to perform idle channel estimation at any position of the subframe i, and this is not limited in this embodiment of the present application. Wherein i is 0,1,2,3, … …,9, … …. For example, taking idle channel estimation as LBT, the terminal device may perform LBT in subframe i, where the LBT is started by the terminal device at the start position of subframe i, or the LBT is started by the terminal device at the middle position of subframe i, or the LBT is started by the terminal device at any position of subframe i, and this is not limited in the 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 called a detection time window T, which is described above and is not described herein again) configured by the network device, and the terminal device can acquire the permission to send data only when detecting at least X idle time slots (having a specific time length, and a specific data system setting, for example, may be 16 us). The random number X is a parameter related to LBT, and for brevity, the random number X is referred to as an LBT parameter in this application.

Alternatively, the LBT parameter may be associated with the maximum transmission duration, that is, the LBT parameter may be associated with the remaining number of 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 only generates the LBT parameters according to the contention window parameter T, i.e. randomly generates a random number X from 0 to T, the LBT time may be too long, resulting in a 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-mentioned problems can be avoided.

Optionally, in the LBT process of the terminal device, when the subframe boundary of the resource pool 2 is reached, whether to stop LBT or whether to suspend LBT is determined according to the remaining number of subframes 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 subframe of resource pool 2 has a boundary. In the LBT process of the terminal device, when the boundary of the subframe of the resource pool 2 is reached, if the parameter X of the LBT is still greater than 0 (i.e., no channel is acquired), that is, no idle channel is acquired currently, the terminal device may adopt any one of the following methods.

The method comprises the following steps: LBT is directly stopped, and random number X is generated again to carry out LBT 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, that is, no idle channel is currently acquired, LBT may be directly stopped. And when the subframe of the next resource pool 2 starts, the random number X is generated again and LBT is carried out.

The method 2 comprises the following steps: LBT was directly stopped and resumed following 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, that is, no idle channel is currently acquired, LBT may be directly stopped. Waiting until the beginning of the subframe of the next resource pool 2, LBT is performed again using the previously generated M.

The method 3 comprises the following steps: the LBT is suspended (or suspended) and continues to be performed until the beginning of the next subframe of resource pool 2.

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, that is, no idle channel is currently acquired, the LBT may be suspended or suspended. Waiting until the beginning of the subframe of the next resource pool 2, the previously suspended or suspended LBT is continued.

The method 4 comprises the following steps: whether to suspend LBT is determined based on the GAP (GAP).

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

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, that is, no idle channel is currently acquired, and the time (that is, the interval) for which LBT is to 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, the method 1 or the method 2 may be adopted. The preset threshold may be preset, or a protocol is predefined, which is not limited in this application. The benefit of this may be to address scenarios such as: when the GAP time is too long and the vehicle runs far, the previous LBT result can not be used as reference. Alternatively, in some scenarios, such as assisted driving or advanced driving assistance systems, smart driving, smart internet 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 higher the vehicle speed the larger the GAP.

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

When the terminal device performs sending on resource pool 1, the detection time window may be a certain value (e.g., X ═ 1s) or a channel selection time window (e.g., 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 resource pool 2 (or the number of subframes of 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 parameters X and/or Y.

Optionally, in the process of sending by the terminal device, when the subframe boundary of the resource pool 2 is reached, whether to stop sending or whether to suspend is determined according to the remaining number of subframes 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 subframe of resource pool 2 has a boundary. 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 (that is, no channel is acquired), that is, no idle channel is acquired currently, the terminal device may adopt any one of the following methods.

The method comprises the following steps: directly stopping the sending process, and subsequently, restarting the sending process.

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, the idle channel is not currently acquired, the channel detection process can be directly stopped. Waiting until the beginning of the subframe of the next resource pool 2, the sending process is restarted.

The method 2 comprises the following steps: the sending process is suspended (or suspended) and continues to be performed when the subframe of the next resource pool 2 starts.

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. Waiting until the start of the subframe of the next resource pool 2, the sending procedure, which was previously suspended or suspended, is continued.

The method 3 comprises the following steps: it is determined whether the sending process is suspended according to the GAP (GAP).

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

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, the time (that is, the interval) when sending is to 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, the method 1 described above may be employed. The preset threshold may be preset, or the protocol is predefined. The present embodiment is not limited to this. The benefit of this may be to address scenarios such as: when the GAP time is too long and the vehicle runs far, the previous sending result can not be used as reference. Alternatively, in some scenarios, such as assisted driving or advanced driving assistance systems, smart driving, smart internet 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 higher the vehicle speed the larger the GAP.

LBT is performed with the terminal device as exemplified in connection with fig. 9. In fig. 9, it is assumed that the 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 subframes of resource pool 2, and subframe 4, subframe 5, and subframe 6 belong to subframes of resource pool 1. After subframe 3LBT, the terminal device calculates an interval (i.e., LBT suspension interval), and determines that the interval is 3 subframes, i.e., subframe 4 to subframe 6. As shown in case a in fig. 9, assuming that the interval is smaller than the preset threshold, that is, the duration of 3 subframes is smaller than the preset threshold, the method 3, that is, suspending LBT, may be adopted, and when the subframe of the next resource pool 2 starts, that is, when the subframe reaches to subframe 7, the terminal device continues the LBT process. Assuming that LBT is successful, i.e. a clear channel is obtained, at subframe 8, the terminal device starts data transmission from subframe 8. Subframes that may be occupied by data transmission are 3 subframes, subframe 8, subframe 9, and subframe 0.

Case B is a case 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. After subframe 0LBT, the terminal device calculates an interval (i.e., LBT suspension interval), and determines that the interval is 6 subframes, i.e., subframe 1 to subframe 6. As shown in case B in fig. 9, assuming that the interval is greater than or equal to the preset threshold, that is, the duration of 6 subframes is greater than or equal to the preset threshold, the method 1 or the method 2 may be adopted, and when the subframe of the next resource pool 2 starts, that is, when the subframe 7 is reached, the terminal device performs LBT again. The terminal device performs LBT again in subframe 7, and starts data transmission from subframe 8, assuming that LBT is successful at subframe 8, i.e. obtains a free channel. Subframes that may be occupied by data transmission are 3 subframes, subframe 8, subframe 9, and subframe 0.

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

The terminal device obtains resources for sending data in the resource pool 1, where the resources obtained by the terminal device may be based on scheduling of a base station, pre-configuration, or based on an existing sending mechanism (data sending can be performed in a resource reservation manner), and the like, and the embodiment of the present application is not limited thereto.

Optionally, for the services configured on resource pool 1, or for some services, such as services with higher requirements on latency, 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 resource of the resource pool 2 to transmit the service data, the terminal device or the network device may first send the SCI indicating the length of the scheduling resource. The detection time of the terminal equipment can be shortened by sending SCI to the terminal equipment to indicate information such as scheduling duration, and related scheduling information can be indicated to the sending end UE by the network equipment and then sent to the receiving end UE by the sending end UE.

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

As shown in fig. 10, the network device transmits an SCI in subframe 3, and may indicate the length of the scheduling using a Symbol Length Indication Value (SLIV). The network device sends the SCI in subframe 3, which may be the network device sending the SCI at the starting position of subframe 3, or the network device sending the SCI at any position of subframe 3, which is not limited in this embodiment.

The terminal device performing channel sensing on the subframe of the resource pool 2 receives the corresponding SCI and performs demodulation and decoding, so as to start the LBT time and perform LBT time-frequency domain bandwidth.

The process in which a communication device receives a signal on a certain channel to detect whether the channel is idle (or called idle channel assessment) may be referred to as channel sensing. Specifically, if the communication device determines whether the channel is idle through signal detection, in the case that a specific signal is not detected, the channel is considered to be idle, or in other words, the signal transmission of other communication devices is not heard; in the event that a particular signal is detected, the channel is deemed busy or, in other words, the signaling of other communication devices is heard. If the communication equipment determines whether the channel is idle through energy detection, the channel is considered to be idle or signals of other communication equipment cannot be sent under the condition that the received or detected energy is lower than a certain preset threshold value; in the case where the received or detected energy is above some preset threshold, the channel is considered busy, or, the signal transmission of other communication devices is heard.

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

Optionally, an interval between the time when the network device sends the SCI and the beginning 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, and the embodiment of the present application is not limited thereto.

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

Optionally, an interval between the time when the network device sends the SCI and the beginning 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 when the network device sends the SCI and the beginning 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, and the embodiment of the present application is not limited thereto. For example, the scheduling interval is greater than or equal to N2; as another example, assuming that a current subcarrier spacing (SCS) is 15KHz, a scheduling interval is not less than 3 symbols. In this way, that is, the interval between the time when the network device sends the SCI and the beginning of the subframe of the resource pool 2 is greater than or equal to the preset fourth threshold, the terminal device can have a long enough time to set the LBT parameter.

Optionally, 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 less 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, and the embodiment of the present application is not limited thereto.

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

Optionally, 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 greater than or equal to a preset sixth threshold.

For simplicity, 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 denoted as the scheduling interval. 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 greater than or equal to the preset sixth threshold, the terminal device can set the LBT parameter.

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

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

The network device sends 310 resource configuration information.

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 by the terminal device, that is, one or more terminal devices receiving the data to be transmitted by the terminal device. Alternatively, the target device may also be one or more terminal device groups or one or more groups for receiving target data, that is, the terminal devices in the terminal device group or group all receive the data to be transmitted of the terminal device.

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

The network device is configured in two parts by taking a subframe as a unit.

Optionally, the resource configuration information includes information of a radio frame and a subframe. The information about the radio frame and the subframe is described in the method 200, and is not described herein again for brevity.

Optionally, the resource configuration information includes a multiple access mode of the sidelink control channel. In one possible implementation manner, resource pool 1 is SC-FDMA, resource pool 2 is OFDMA, that is, the terminal device sends control channel information (SCI) and data channel of sidelink, and adopts configured multiple access mode; alternatively, a multiple access scheme indicating a scheme for an edge link shared data channel (PSSCH) may be added to the SCI cell.

Optionally, the resource configuration information includes resource allocation pattern information. For example, the resource obtaining Mode of the resource pool 1 is configured to be obtained based on Mode1, that is, a Mode allocated by a network device; the resource acquisition Mode of the resource pool 2 is configured to be based on Mode2 acquisition, i.e. through channel idle detection or LBT mechanism, etc.

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

The terminal device connects the traffic to resource pool 1 320.

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 for resources from the network equipment.

In other words, the terminal device applies for resources in 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 buffering amount is the difference between the expected coverage distance of data to be sent or the path loss value from a sending end to a receiving end, the path loss from a terminal device to a network device (cell path loss for short), the service path loss (such as side link path loss) and the cell path loss.

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

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

Accordingly, the terminal device obtains the resource allocated by the network device, and the resource is the resource in the resource pool 1.

The network equipment allocates scheduling resource information to the terminal equipment according to the request information of the terminal equipment, wherein the allocated 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), and slot aggregation number (number of times traffic data is repeated over successive slots), control channel, or/and 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 equipment can cover the multiple access mode when the resource pool is allocated.

And 350, the terminal equipment transmits data to the target equipment on the allocated resources.

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

Note that, when the network device configures only the multiple access scheme of the sidelink physical control channel (PSCCH), the terminal device determines the multiple access scheme of the data channel according to the coverage and the transmission power, and indicates the scheme in the control channel, as 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, resources for sending the periodic service can be separated independently without being influenced by sending of the aperiodic service, and further, the transmission performance of data is improved.

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

The network device sends 410 resource configuration information.

The network device is configured in two parts by taking a time slot as a unit.

Optionally, the resource configuration information includes information of a subframe and a slot. The information about the subframe and the slot is as described in the method 200, and is not described herein again for brevity.

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 carrier 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 number of slots contained in a subframe
			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 subdivided, and the resource division can reduce the transmission delay of the service. Assuming that the network device only transmits information of the reserved slot group (i.e., resource pool 1) to the terminal device, it can be designed in the following manner:

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

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

if (L-1) ≦ 4, then:

SLIV＝8*(L-1)+S；

otherwise:

SLIV＝8*(8-L+1)+(8-1-S)。

wherein, SLIV can indicate the starting time slot S of the time domain resource relative to the beginning of the sub-frame,

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

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

As shown in fig. 7, the transmission cycle is 5ms (5 subframes), the subframe offset is 0, S is 4, L is 4 in the slot, and SLIV is 8 (L-1) + S is 8, 3+4 is 28.

The terminal device connects the traffic to resource pool 2 420.

430, the terminal device acquires the resource through LBT.

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

A. Initial setting of parameters

The terminal device may calculate the detection duration or the number of detection time slots according to the protocol configuration. It should be understood that a time slot here is not synonymous with a time slot for scheduled transmission of data, where a time slot is a unit of time, such as 16 us. And if the current protocol carries out the determination of the number parameters of the detection time slots according to the priority class and the service data sending time length. Assume that the calculation output parameter is CW _ L (contention window length). Assume the rules for contention window parameter setting as follows in table 3:

TABLE 3

Channel access priority	CW_min,p	CW_max,p	Time of flight
				1	3	7	2ms
2	7	15	3ms
				3	15	63	8ms
4	15	1023	10ms

In the above 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 remaining 'resource pool 2 time slots', and when the remaining time is greater than a certain threshold value, not performing parameter correction, for example, as for the following table: the threshold value may take the following values: transmission time + maximum contention window number channel listening slot length. If the detection time is less than a certain threshold value, the detection time parameter setting is reduced until the condition is met.

And (3) idle channel detection: and if the sending resource is acquired before the end of the subframe of the resource pool 2, the reading help sends data on the acquired resource. Otherwise: and judging the interval duration of the subframe of the next resource pool 2, if the interval duration is greater than a threshold, such as greater than 100ms, resetting the length of a related detection window when detecting the resource on the subframe of the next resource pool 2, otherwise, continuing the detection.

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

Wherein the data comprises traffic data. Correspondingly, the target device detects the control channel information on the resource pool 2 based on the received configuration information according to the configured subframe information, multiple access information 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, the problem of monitoring boundary resources based on LBT can be solved, and the transmission performance of data is improved.

The method for transmitting data according to the embodiment of the present application is described in detail with reference to fig. 5 to 12. Hereinafter, a communication device according to an embodiment of the present application will be described in detail 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 apparatus 1000 may correspond to the terminal device in the above method embodiment, and may be, for example, the terminal device or a chip configured in the terminal device. The communication unit 1100 is configured to perform transceiving related operations on the terminal device side in the above method embodiments, and the processing unit 1200 is configured to perform processing related operations of the terminal device in the above method embodiments.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 200, the method 300 and the method 400 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for performing the method performed by the terminal device in the method 200, the method 300 and the method 400. Also, the units and other operations and/or functions in the communication device 1000 are respectively for realizing the corresponding flows of the method 200, the method 300 and the method 400.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

It is further understood 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 shown in fig. 14, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 shown in fig. 14.

It should also be understood that when the communication apparatus 1000 is a chip configured in a terminal device, the communication unit 1100 in the communication apparatus 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, and may be, for example, a network device or a chip configured in a network device. The communication unit 1100 is configured to perform transceiving related operations on the network device side in the above method embodiments, and the processing unit 1200 is configured to perform processing related operations on the network device in the above method embodiments.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 200, the method 300 and the method 400 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for performing the method performed by the network device in the method 200, the method 300 and the method 300 in the method 400. Also, the units and other operations and/or functions in the communication device 1000 are respectively for realizing the corresponding flows of the method 200, the method 300 and the method 400.

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

Fig. 14 is a schematic structural diagram of a terminal device 2000 according to an embodiment of the present application. The terminal device 2000 can be applied to the system shown in fig. 1 or fig. 2, and performs the functions of the terminal device in the above 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. The processor 2010, the transceiver 2002 and the memory 2030 may be in communication with each other via the interconnection path to transfer control and/or data signals, the memory 2030 may be used for storing a computer program, and the processor 2010 may be used for retrieving and executing 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, configured to transmit uplink data or uplink control signaling output by the transceiver 2020 by using a wireless signal.

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

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

It should be understood that the terminal device 2000 shown in fig. 14 can implement the various processes related to the terminal device in the various method embodiments described above. The operations and/or functions of the modules in the terminal device 2000 are respectively to implement the corresponding flows in the above-described method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

The processor 2010 may be configured to perform the actions described in the preceding method embodiments that are implemented within the terminal device, and the transceiver 2020 may be configured to perform the actions described in the preceding method embodiments that the terminal device transmits to or receives from the network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

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

In addition, in order to further improve the functions of the terminal device, 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, which may be a schematic structural diagram of a base station, for example. The base station 3000 can be applied to the system shown in fig. 1 or fig. 2, and performs the functions of the network device in the above method embodiments. As shown, the base station 3000 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 3100 and one or more baseband units (BBUs) (which may also be referred to as Distributed Units (DUs)) 3200. The RRU3100 may be referred to as a transceiver unit and corresponds to the communication unit 1200 in fig. 13. Alternatively, the transceiving unit 3100 may also be referred to as a transceiver, transceiving circuit, or transceiver, etc., which may comprise at least one antenna 3101 and a radio frequency unit 3102. Alternatively, the transceiving unit 3100 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit). The RRU3100 part is mainly used for transceiving and converting radio frequency signals to baseband signals, for example, for sending indication information to a terminal device. The BBU3200 section is mainly used for performing baseband processing, controlling a base station, and the like. The RRU3100 and the BBU3200 may be physically disposed together or may be physically disposed separately, i.e. distributed base stations.

The BBU3200, which is a control center of the base station and may also be referred to as a processing unit, 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 the like. For example, the BBU (processing unit) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU3200 may be formed by one or more boards, and the boards may collectively support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is used for controlling the base station to perform necessary actions, for example, for controlling the base station to execute the operation flow 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 processor may be provided separately on each board. Multiple boards may 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 can implement the processes related to the network device in the 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 may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

BBU3200 as described above can be used to perform actions described in previous method embodiments as being implemented internally by a network device, while RRU3100 can be used to perform actions described in previous method embodiments as being sent by or received from a terminal device by a network device. Please refer to the description of the previous embodiment of the method, which is 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 communication in any of the above method embodiments.

It should be understood that the processing means may be a chip. For example, the processing device may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a programmable logic controller (PLD), or other integrated chips.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor described above 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, discrete hardware components. The various methods, steps, and logic blocks disclosed 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 the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile 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. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus 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 present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method of any one of the embodiments illustrated as method 200, method 300 and method 400.

According to the method provided by the embodiment of the present application, a computer-readable medium is further provided, which stores program code, and when the program code runs on a computer, the computer is caused to execute the method of any one of the embodiments of the method 200, the method 300 and the method 400.

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

In the above embodiments, the implementation may be wholly or partially realized 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the 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 Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The network device in the foregoing device embodiments completely corresponds to the terminal device and the network device or the terminal device in the method embodiments, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps besides transmitting and receiving may be executed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors 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 can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, 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 another component 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 implementation. 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 is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into 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 or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the 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 conceive of the changes or substitutions within the technical scope of the present application, and shall 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:

a first terminal device obtains information of a first resource pool and information of a second resource pool, wherein a resource network device in the first resource pool is a resource allocated to the terminal device, a resource in the second resource pool is a resource 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 second terminal equipment by using a first resource in the first resource pool, wherein the first resource is a resource allocated by the network equipment; and/or

And the first terminal equipment sends second data to third terminal equipment by using a second resource in the second resource pool, wherein the second resource is obtained through idle channel assessment.

2. The method of claim 1,

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 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 following steps:

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

and the first terminal equipment performs idle channel assessment again 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.

3. The method of claim 2,

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

4. The method of claim 1,

the method further comprises the following steps:

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

and the first terminal equipment continues to evaluate the idle channel in the second time unit group based on the idle channel evaluation parameter.

5. The method of claim 4,

and the first terminal device suspends the evaluation of the idle channel when the first time unit group 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 smaller than a preset second threshold value.

6. The method according to any one of claims 1 to 5, further comprising:

the first terminal equipment receives 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 acquiring, by the first terminal device, information of the first resource pool and information of the second resource pool includes:

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.

7. The method of claim 1, further comprising:

the first terminal equipment receives sidelink 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, and/or the interval between the first time and the frequency domain starting position in the second resource pool is larger than or equal to a preset sixth threshold.

8. A method of transmitting data, comprising:

the method comprises the steps that a network device divides a first resource pool and a second resource pool, wherein resources in the first resource pool are resources allocated to a terminal device by the network device, 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;

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

9. The method of claim 8, further comprising:

the network equipment transmits Sidelink Control Information (SCI) by using resources 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 the 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;

10. The method according to any one of claims 1 to 9,

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

the first resource pool and the second resource pool are overlapped in a frequency domain and are not overlapped in a time domain.

11. A communication device, characterized in that it is adapted to implement the method according to any of claims 1 to 7.

12. A communication device for implementing the method of any one of claims 8 to 10.