CN116349364A

CN116349364A - Method and device for determining size of transmission block

Info

Publication number: CN116349364A
Application number: CN202380007995.1A
Authority: CN
Inventors: 赵文素
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-06-27

Abstract

The embodiment of the application discloses a method and a device for determining the size of a transmission block, which can be applied to the technical field of communication, wherein the method comprises the following steps: the transmitting terminal device may determine a target candidate start symbol in the first slot resource based on a specified criterion; and sending indication information for indicating the target candidate starting symbol to the terminal equipment, so that the receiving terminal equipment can determine the size of the transmission block carried in the first time slot resource according to the target candidate starting symbol, thereby being capable of determining the proper target candidate starting symbol based on the appointed criterion, further determining the proper transmission block size, and sending data from the transmitting terminal equipment to the receiving terminal equipment according to the transmission block size, thereby being capable of improving the resource utilization rate of the time slot resource.

Description

Method and device for determining size of transmission block

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a size of a transport block.

Background

In the unlicensed Side Link (SL) band, the transmission of the physical side-link shared channel (Physical Sidelink Shared Channel, PSSCH) from different candidate start symbols, when 2 candidate start symbols are supported in 1 slot (slot), will make the reference symbol lengths different, and thus the transport block sizes (Transport Block size, TB size) also different. For example, when determining the reference symbol length with the first candidate start symbol and calculating the TB size, the reference symbol length is L1, and the calculated TB size is size1; when the reference symbol length is determined with the second candidate start symbol and the TB size is calculated, the reference symbol length is L2 and the calculated TB size is size2.

In the 111 conference, it is proposed that the transmitting terminal device can flexibly decide which candidate start symbol to use to decide the reference symbol length, and instruct the receiving terminal device to decide the calculation of the TB size according to the reference symbol length, but lack the corresponding candidate start symbol selection strategy.

Disclosure of Invention

The embodiment of the application provides a method and a device for determining the size of a transmission block, which can be applied to the technical field of communication, and a sending terminal device can determine a target candidate starting symbol in a first time slot resource based on a specified criterion; and sending indication information for indicating the target candidate starting symbol to the terminal equipment, so that the receiving terminal equipment can determine the size of the transmission block carried in the first time slot resource according to the target candidate starting symbol, thereby improving the resource utilization rate of the time slot resource.

In a first aspect, an embodiment of the present application provides a method for determining a transport block size, which is applied to a transmitting terminal device, where the method includes: determining a target candidate start symbol in a first time slot resource based on a specified criterion, wherein the target candidate start symbol is used for a receiving terminal device to determine the size of a transmission block carried in the first time slot resource; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

In the embodiment of the present application, the sending terminal device may determine, based on a specified criterion, a target candidate start symbol in the first slot resource; and sending indication information for indicating the target candidate starting symbol to the terminal equipment, so that the receiving terminal equipment can determine the size of the transmission block carried in the first time slot resource according to the target candidate starting symbol, thereby improving the resource utilization rate of the time slot resource.

In a second aspect, an embodiment of the present application provides another method for determining a transport block size, applied to a receiving terminal device, where the method includes: receiving indication information of a sending terminal device, wherein the indication information is used for indicating a target candidate starting symbol in a first time slot resource of the sending terminal device, and the target candidate starting symbol is determined by the sending terminal device based on a specified criterion; and determining the size of the transmission block carried in the first time slot resource based on the target candidate start symbol.

In the embodiment of the application, the receiving terminal device receives the indication information sent by the sending terminal device, and determines the size of the transmission block carried in the first time slot resource according to the target candidate start symbol in the first time slot resource indicated by the indication information, wherein the target candidate start symbol is determined by the sending terminal device based on the specified criterion, so that the resource utilization rate of the time slot resource can be improved.

In a third aspect, an embodiment of the present application provides a communication device, where the communication device has a function of implementing part or all of the sending terminal device in the method described in the first aspect, for example, a function of the communication device may be provided in part or all of the embodiments of the present application, or may be provided with a function of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functions described above.

In one implementation, the communication device may include a transceiver unit and a processing unit in a structure, where the processing unit is configured to support the communication device to perform the corresponding functions in the method. The transceiver unit is used for supporting communication between the communication device and other equipment. The communication device may further comprise a storage unit for coupling with the transceiver unit and the processing unit, which stores computer programs and data necessary for the communication device.

As an example, the processing unit may be a processor, the transceiver unit may be a transceiver or a communication interface, and the storage unit may be a memory.

In a fourth aspect, embodiments of the present application provide another communication apparatus having a function of implementing part or all of the receiving terminal device in the method example described in the second aspect, for example, the function of the communication apparatus may be a function of some or all of the embodiments of the present application, or may be a function of implementing any of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functions described above.

In a fifth aspect, embodiments of the present application provide a communication device, which includes a processor, when the processor invokes a computer program in a memory, to perform the method of the first aspect.

In a sixth aspect, embodiments of the present application provide a communications device including a processor, when the processor invokes a computer program in memory, to perform the method of the second aspect.

In a seventh aspect, embodiments of the present application provide a communication apparatus comprising a processor and a memory, the memory having a computer program stored therein; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the first aspect described above.

In an eighth aspect, embodiments of the present application provide a communication apparatus comprising a processor and a memory, the memory having a computer program stored therein; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the second aspect described above.

In a ninth aspect, embodiments of the present application provide a communications device, the device comprising a processor and interface circuitry for receiving code instructions and transmitting to the processor, the processor being configured to execute the code instructions to cause the device to perform the method of the first aspect described above.

In a tenth aspect, embodiments of the present application provide a communications device comprising a processor and interface circuitry for receiving code instructions and transmitting to the processor, the processor being configured to execute the code instructions to cause the device to perform the method of the second aspect described above.

In an eleventh aspect, an embodiment of the present application provides a communication system, where the system includes a communication device according to the third aspect and a communication device according to the fourth aspect, or where the system includes a communication device according to the fifth aspect and a communication device according to the sixth aspect, or where the system includes a communication device according to the seventh aspect and a communication device according to the eighth aspect, or where the system includes a communication device according to the ninth aspect and a communication device according to the tenth aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer readable storage medium storing instructions for use by the transmitting terminal device, where the instructions, when executed, cause the terminal device to perform the method according to the first aspect.

In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium, configured to store instructions for use by the receiving terminal device, where the instructions, when executed, cause the network device to perform the method according to the second aspect.

In a fourteenth aspect, the present application also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a fifteenth aspect, the present application also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

In a sixteenth aspect, the present application provides a chip system comprising at least one processor and an interface for supporting a transmitting terminal device to implement the functionality referred to in the first aspect, e.g. to determine or process at least one of data and information referred to in the above-mentioned method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the transmitting terminal device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a seventeenth aspect, the present application provides a chip system comprising at least one processor and an interface for supporting a receiving terminal device to implement the functionality referred to in the second aspect, e.g. to determine or process at least one of data and information referred to in the above-mentioned method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the receiving terminal device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In an eighteenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a nineteenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

Drawings

In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.

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

fig. 2 is a flow chart of a method for determining a transport block size according to an embodiment of the present application;

FIG. 3 is a schematic diagram of candidate start symbols in a slot resource;

fig. 4 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 5 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 6 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 7 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

Fig. 8 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 9 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 10 is a flowchart of another method for determining a transport block size according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

In order to better understand a method for determining a transport block size and a device thereof disclosed in the embodiments of the present application, a communication system to which the embodiments of the present application are applicable is first described below.

Referring to fig. 1, fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application. The communication system may include, but is not limited to, one network device and one terminal device, and the number and form of devices shown in fig. 1 are only used as examples and not limiting to the embodiments of the present application, and may include two or more network devices and two or more terminal devices in practical applications. The communication system shown in fig. 1 is exemplified as including a network device 101 and a terminal device 102.

It should be noted that the technical solution of the embodiment of the present application may be applied to various communication systems. For example: a long term evolution (long term evolution, LTE) system, a fifth generation (5th generation,5G) mobile communication system, a 5G New Radio (NR) system, or other future new mobile communication systems, etc. It should also be noted that the sidelink in the embodiments of the present application may also be referred to as a sidelink or a through link.

The network device 101 in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (transmission reception point, TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (wireless fidelity, wiFi) system, etc. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device. The network device provided in this embodiment of the present application may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), and the structure of the CU-DU may be used to split the protocol layers of the network device, for example, a base station, where functions of part of the protocol layers are placed in the CU for centralized control, and functions of part or all of the protocol layers are distributed in the DU for centralized control of the DU by the CU.

The terminal device 102 in this embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), a User Equipment (UE), a Mobile Station (MS), a mobile terminal device (MT), etc. The terminal device may be an automobile with a communication function, a smart car, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned-driving (self-driving), a wireless terminal device in teleoperation (remote medical surgery), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

In the Side Link (SL) unlicensed band, 1 slot (slot) is supported with 2 candidate start symbols, e.g. the first candidate start symbol is located at the position of symbol 0 in 1 slot, and the second candidate start symbol is located at the position of symbol 4 or symbol 7 in 1 slot (14 symbols in 1 slot, i.e. symbol 0-symbol 13). When starting transmission of the physical side uplink shared channel (Physical Sidelink Shared Channel, PSSCH) from different candidate start symbols, the reference symbol length, which may refer to the number of symbols in 1 slot for PSSCH transmission, is made different, which in turn makes the transport block size (Transport Block size, TB size) different. For example, when determining the reference symbol length with the first candidate start symbol and calculating the TB size, the reference symbol length is L1, L1 may be 12 symbols long, and the calculated TB size is size1; when the reference symbol length is determined by the second candidate start symbol and the TB size is calculated, the reference symbol length is L2, L2 may be 5 or 8 symbols in length, and the calculated TB size is size2.

In the 111 conference, it is proposed that the transmitting terminal device can flexibly decide which candidate start symbol to use for deciding the reference symbol length, and dynamically indicate to the receiving terminal device which candidate start symbol to decide the reference symbol length based on. But lacks a corresponding candidate start symbol selection strategy.

It may be understood that, the communication system described in the embodiments of the present application is for more clearly describing the technical solution of the embodiments of the present application, and is not limited to the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of a new service scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.

The transmitting terminal device described in any one of the embodiments of the present application is a terminal device for determining a target candidate start symbol and transmitting instruction information, and may refer to, for example, the terminal device 102 in the communication system shown in fig. 1. The receiving terminal device described in any one of the embodiments of the present application is a terminal device for receiving transmission indication information and determining a transport block size carried in the first timeslot resource according to the indicated target candidate start symbol, and may refer to, for example, the terminal device 102 in the communication system shown in fig. 1.

The transmitting terminal device carries a 1-bit indication information in SCI (sidelinkcontrolinformation), indicates a target candidate start symbol in the first slot resource, for example, the bit value is 0, indicates that the target start symbol is a first candidate start symbol, the receiving terminal device receives the indication information, calculates a TB size based on the first candidate start symbol, the bit value is 1, indicates that the target start symbol is a second candidate start symbol, and the receiving terminal device receives the indication information and calculates the TB size based on the second candidate start symbol.

It should be noted that, the method for determining the size of the transport block provided in any one of the embodiments of the present application may be performed alone or in combination with possible implementation methods in other embodiments, and may also be performed in combination with any one of the technical solutions in the related art.

The method and apparatus for determining the size of a transport block provided in the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of a method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. As shown in fig. 2, the method may include, but is not limited to, the steps of:

step S201: based on the specified criteria, determining a target candidate start symbol in the first time slot resource, where the target candidate start symbol is used for the receiving terminal device to determine a transport block size carried in the first time slot resource.

In the embodiment of the present application, the transmitting terminal device may refer to a terminal device that needs to transmit data to other terminal devices. The receiving terminal device may refer to a terminal device that needs to receive data sent by other terminal devices. If one terminal device needs to send data to other terminal devices and receive data sent by other terminal devices, the terminal device can be a sending terminal device or a receiving terminal device. If one terminal device only needs to send data to other terminal devices, the terminal device may be a sending terminal device. If one terminal device only needs to receive data sent by other terminal devices, the terminal device may be a receiving terminal device.

In the embodiment of the present application, the first timeslot resource may be a timeslot resource selected or allocated for the transmitting terminal device. The candidate start symbols in the slot resources selected or allocated by the transmitting terminal device may be 2, respectively the first candidate start symbol and the second candidate start symbol. As shown in fig. 3, a schematic diagram of candidate start symbols in a slot resource (slot). In fig. 3, the first arrow points to a position, representing the position of the first candidate start symbol; the second arrow points to a position indicating the position of the second candidate start symbol. The first candidate start symbol may be, for example, the first symbol in the slot resource, i.e., symbol 0. The second candidate start symbol may be, for example, the fifth or eighth symbol in the slot resource, i.e., symbol 4 or symbol7.

Wherein the determined transport block sizes are different for different candidate start symbols. Taking the first candidate start symbol as an example of the first symbol in the slot resource, the reference symbol length calculated according to the first candidate start symbol may be 12, that is, the length of the AGC symbol and the GP symbol subtracted from the total length of the symbols in the slot resource. Under the reference symbol length, the number of Resource Elements (REs) to which the transport block can map is larger, and the calculated transport block size is larger.

Taking the second candidate start symbol as an example of the eighth symbol in the slot resource, the reference symbol length calculated according to the second candidate start symbol may be 5, that is, the length of the AGC symbol and the GP symbol subtracted from the symbol length after the start of the second candidate start symbol in the timing resource. And under the reference symbol length, the number of the resource blocks which can be mapped by the transmission block is smaller, and the calculated transmission block size is smaller.

In embodiments of the present application, the specified criteria may be any one of a number of criteria, either pre-configured or pre-defined. Wherein the plurality of criteria may be preconfigured or predefined by the network device. Wherein, optionally, a first criterion of the plurality of criteria may be a determination of a target candidate start symbol in the first time slot resource based on a channel occupancy (channel occupancy ration, CR) of the sidelink channel. Specifically, the first criterion may specifically be that, when the current channel occupancy of the sidelink channel is less than or equal to the channel occupancy threshold, determining that the target candidate start symbol is a first candidate start symbol in the first time slot resource; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource under the condition that the current channel occupancy is greater than or equal to the channel occupancy threshold. Wherein the channel occupancy threshold may be preconfigured or predefined by the network device. Wherein, the sidestream channel may refer to at least one of the following: physical side uplink shared channel (Physical Sidelink Shared Channel, PSSCH), physical side uplink feedback channel (physical sidelink feedback channel, PSFCH), and the like.

Wherein, the calculation methods of the channel occupancy and the channel occupancy threshold reuse the calculation methods specified in R16. I.e. R16 terminal equipment (UE) in [ n-a, n+1 ]]Number of subchannels in range that have been used for transmitting data and [ n, n+b ]]The number of sub-channels included in the acquired sidelink grant within range is n-a, n + b]The ratio of the total number of sub-channels belonging to the resource pool in the range, wherein the value of a and b is determined by the UE. Time slot n refers to a time slot selected or allocated by the UE for transmitting data. Wherein CR is _Limit (k) Limiting value of CR measured for a system configured sidelink transmission of priority k, k value being pre-configuredA value of Sigma _ｉ≥k CR(i)≤CR _Limit (k) And the CR sum corresponding to the through link transmission with the priority value not lower than k is smaller than or equal to the CR Limit value corresponding to the priority k.

Wherein, optionally, a second criterion of the plurality of criteria may be a determination of a target candidate start symbol in the first time slot resource based on a channel busy rate (channel busy ration, CBR) of the sidelink channel. Specifically, the second criterion may specifically be that, when the current channel busy rate of the sidelink channel is less than or equal to the channel busy rate threshold, the target candidate start symbol is determined to be the first candidate start symbol in the first time slot resource; or determining the target candidate start symbol as the second candidate start symbol in the first time slot resource under the condition that the current channel busy rate is greater than or equal to the channel busy rate threshold. Wherein the channel busy rate threshold may be preconfigured or predefined by the network device.

The calculation method of the channel busy rate and the channel busy rate threshold value reuse the calculation method specified in R16. Method for measuring CBR in reuse R16, measuring busyness of channel when current time slot n is selected or allocated by UE for transmitting data, measuring window [ n-c, n-1 ]]The ratio of subchannels having an internal measured received channel strength indication (Received Signal Strength Indicator, RSSI) value above a configuration threshold to the total number of subchannels in the resource pool, where c is 100 or 100.2 ^u And (c) slots, wherein u refers to the subcarrier spacing size, u=0, 1,2,3.

Wherein, optionally, a third criterion of the plurality of criteria may be that the target candidate start symbol in the first time slot resource is determined according to whether the first time slot resource is located in a Channel Occupancy Time (COT) of other terminal devices except the transmitting terminal device. Specifically, the third criterion may specifically be that, when the first timeslot resource is located within the channel occupation time COT of the other terminal device, the target candidate start symbol is determined to be the first candidate start symbol in the first timeslot resource; and under the condition that the first time slot resource is not located in the COT of other terminal equipment, determining the target candidate starting symbol as a second candidate starting symbol in the first time slot resource.

Wherein, optionally, a fourth criterion of the plurality of criteria may determine the target candidate start symbol in the first time slot resource according to a channel access type performed before the first time slot resource acquired by the transmitting terminal device. Specifically, the fourth criterion may specifically be that, in a case where the channel access Type performed before the first timeslot resource acquired by the sending terminal device is Type 2A, type 2B, or Type 2C, it is determined that the target candidate start symbol is a first candidate start symbol in the first timeslot resource; and under the condition that the channel access Type is Type1, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

Wherein, optionally, a fifth criterion of the plurality of criteria may be that the target candidate start symbol in the first time slot resource is determined according to whether the first time slot resource is a plurality of consecutive time slot resources and/or whether the plurality of consecutive time slot resources are located within the channel occupation time COT of the other terminal devices except the transmitting terminal device. Specifically, in one example, the fifth criterion may specifically be that, in a case where the first time slot resource is a plurality of continuous time slot resources, for a first time slot resource in the plurality of continuous time slot resources, a target candidate start symbol in the first time slot resource is determined based on a current channel occupancy rate or a current channel busy rate of the sidelink channel; for other time slot resources of the plurality of consecutive time slot resources, except for the first time slot resource, determining the target candidate start symbol in the other time slot resources as the first candidate start symbol in the other time slot resources.

In addition, in the case where the first slot resource is a plurality of discontinuous slot resources, or in the case where the first slot resource is a single slot resource, the target candidate start symbol in the first slot resource may be determined as the second candidate start symbol in the slot resource for each slot resource in the first slot resource.

Specifically, in another example, the fifth criterion may specifically be that, in a case where the first time slot resource is a plurality of continuous time slot resources, the target candidate start symbol in each of the plurality of continuous time slot resources is determined in combination with whether the plurality of continuous time slot resources are located in the COTs of the other terminal devices except the transmitting terminal device. For example, in the case that the first slot resource is a plurality of continuous slot resources, if the plurality of continuous slot resources are all located in the COTs of other terminal devices, determining a target candidate start symbol in each of the plurality of continuous slot resources as a first candidate start symbol in the corresponding slot resource; if part of the time slot resources or all the time slot resources in the plurality of continuous time slot resources are not located in the COT of other terminal equipment, determining a target candidate starting symbol in each time slot resource in the plurality of continuous time slot resources as a second candidate starting symbol in the corresponding time slot resource.

In addition, in the case where the first slot resource is a plurality of discontinuous slot resources, or in the case where the first slot resource is a single slot resource, the target candidate start symbol in the slot resource may be determined as the second candidate start symbol in the slot resource for each slot resource.

Step S202: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

In the embodiment of the present application, after receiving the indication information, the receiving terminal device may determine, according to the indication information, a target candidate start symbol in the first timeslot resource of the sending terminal device; and determining the size of the transmission block carried in the first time slot resource according to the target candidate starting symbol in the first time slot resource.

According to the method for determining the size of the transmission block, the sending terminal equipment can determine the target candidate starting symbol in the first time slot resource based on the specified criterion; and sending indication information for indicating the target candidate starting symbol to the terminal equipment, so that the receiving terminal equipment can determine the size of a transmission block carried in the first time slot resource according to the target candidate starting symbol, thereby being capable of determining a proper target candidate starting symbol based on a specified criterion, further determining a proper transmission block size, and sending data from the transmitting terminal equipment to the receiving terminal equipment on the first time slot resource according to the transmission block size, thereby being capable of improving the resource utilization rate of the time slot resource.

Referring to fig. 4, fig. 4 is a flowchart illustrating another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The appointed criterion is that under the condition that the current channel occupancy rate of the sidestream channel is smaller than or equal to the channel occupancy rate threshold value, the target candidate starting symbol is determined to be the first candidate starting symbol in the first time slot resource; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource under the condition that the current channel occupancy is greater than or equal to the channel occupancy threshold. Correspondingly, as shown in fig. 4, the method may include, but is not limited to, the following steps:

step S401: and determining the current channel occupancy rate of the sidestream channel.

In the embodiment of the present application, the sidestream channel may refer to at least one of the following: physical side uplink shared channel (Physical Sidelink Shared Channel, PSSCH), physical side uplink feedback channel (physical sidelink feedback channel, PSFCH), and the like.

In the embodiment of the present application, the calculation method of the channel occupancy and the channel occupancy threshold reuse the calculation method specified in R16. I.e. R16 terminal equipment (UE) in [ n-a, n+1 ] ]Number of subchannels in range that have been used for transmitting data and [ n, n+b ]]The number of sub-channels included in the acquired sidelink grant within range is n-a, n + b]The ratio of the total number of sub-channels belonging to the resource pool in the range, wherein the value of a and b is determined by the UE. Time slot n refers to a time slot selected or allocated by the UE for transmitting data. Wherein CR is _Limit (k) Transmitting the measured limit value of CR for the sidelink of priority k of the system configuration, k being a preconfigured value, Σ _i≥k CR(i)≤CR _Limｉｔ (k) And the CR sum corresponding to the through link transmission with the priority value not lower than k is smaller than or equal to the CR Limit value corresponding to the priority k.

Step S402: and determining the target candidate start symbol as the first candidate start symbol in the first time slot resource in response to the current channel occupancy being less than or equal to the channel occupancy threshold.

Step S403: and determining the target candidate start symbol as a second candidate start symbol in the first time slot resource in response to the current channel occupancy being greater than or equal to the channel occupancy threshold.

In the embodiment of the present application, the first timeslot resource is a timeslot resource selected or allocated for the transmitting terminal device. Step S402 and step S403 are or are in relation, that is, in an example, in a case where the transmitting terminal device selects or is allocated a slot resource, in a case where the current channel occupancy is less than or equal to the channel occupancy threshold, a first candidate start symbol in each slot resource selected or allocated may be regarded as a target candidate start symbol in the slot resource; in the case where the current channel occupancy is greater than the channel occupancy threshold, the second candidate start symbol in each slot resource selected or allocated may be used as the target candidate start symbol in that slot resource.

In another example of the embodiment of the present application, in a case where the transmitting terminal device selects or is allocated a timeslot resource, in a case where the current channel occupancy is smaller than the channel occupancy threshold, a first candidate start symbol in each selected or allocated timeslot resource may be used as a target candidate start symbol in the timeslot resource; in the case where the current channel occupancy is greater than or equal to the channel occupancy threshold, the second candidate start symbol in each slot resource selected or allocated may be used as the target candidate start symbol in that slot resource.

Step S404: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

In the embodiment of the present application, after determining the target candidate start symbol in the first slot resource, the transmitting terminal device may further perform the following procedure: determining the size of a transmission block carried in each time slot resource in first time slot resources acquired by a transmitting terminal device based on a target candidate starting symbol in the time slot resource; and further transmitting data to the receiving terminal device in the time slot resource according to the transport block size.

According to the method for determining the size of the transmission block, the transmitting terminal equipment can determine the current channel occupancy rate of the sidestream channel; determining that the target candidate starting symbol is a first candidate starting symbol in the first time slot resource in response to the current channel occupancy being less than or equal to the channel occupancy threshold; or, in response to the current channel occupancy being greater than or equal to the channel occupancy threshold, determining the target candidate start symbol as a second candidate start symbol in the first slot resource; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating target candidate starting symbols, so that the suitable target candidate starting symbols can be determined based on the current channel occupancy rate, and further, the suitable transmission block size is determined, and data transmission from the sending terminal equipment to the receiving terminal equipment is carried out on the first time slot resource according to the transmission block size, so that the resource utilization rate of the time slot resource can be improved.

Referring to fig. 5, fig. 5 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The appointed criterion is that under the condition that the current channel busy rate of the side channel is smaller than or equal to the channel busy rate threshold value, the target candidate starting symbol is determined to be the first candidate starting symbol in the first time slot resource; or determining the target candidate start symbol as the second candidate start symbol in the first time slot resource under the condition that the current channel busy rate is greater than or equal to the channel busy rate threshold. Correspondingly, as shown in fig. 5, the method may include, but is not limited to, the following steps:

Step S501: the current channel busy rate of the sidelink channel is determined.

In the application to practiceIn an embodiment, the calculation methods of the channel busy rate and the channel busy rate threshold reuse the calculation methods specified in R16. Method for measuring CBR in reuse R16, measuring busyness of channel when current time slot n is selected or allocated by UE for transmitting data, measuring window [ n-c, n-1 ]]The ratio of subchannels having an internal measured received channel strength indication (Received Signal Strength Indicator, RSSI) value above a configuration threshold to the total number of subchannels in the resource pool, where c is 100 or 100.2 ^u And (c) slots, wherein u refers to the subcarrier spacing size, u=0, 1,2,3.

Step S502: and determining the target candidate start symbol as the first candidate start symbol in the first time slot resource in response to the current channel busy rate being less than or equal to the channel busy rate threshold.

Step S503: and determining the target candidate start symbol as a second candidate start symbol in the first time slot resource in response to the current channel busy rate being greater than or equal to the channel busy rate threshold.

In the embodiment of the present application, the first timeslot resource is a timeslot resource selected or allocated for the transmitting terminal device. Step S502 and step S503 are or are in relation, that is, in an example, in a case where the transmitting terminal device selects or is allocated a slot resource, in a case where the current channel busy rate is less than or equal to the channel busy rate threshold, a first candidate start symbol in each slot resource selected or allocated may be regarded as a target candidate start symbol in the slot resource; in the case where the current channel busy rate is greater than the channel busy rate threshold, the second candidate start symbol in each slot resource selected or allocated may be used as the target candidate start symbol in that slot resource.

In another example, in the case that the sending terminal device selects or is allocated a timeslot resource, in the case that the current channel busy rate is less than the channel busy rate threshold, the first candidate start symbol in each timeslot resource selected or allocated may be used as the target candidate start symbol in the timeslot resource; in the case where the current channel busy rate is greater than or equal to the channel busy rate threshold, the second candidate start symbol in each slot resource selected or allocated may be used as the target candidate start symbol in that slot resource.

Step S504: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

According to the method for determining the size of the transmission block, the transmitting terminal equipment can determine the current channel busy rate of the sidestream channel; determining the target candidate starting symbol as the first candidate starting symbol in the first time slot resource in response to the current channel busy rate being less than or equal to the channel busy rate threshold; or, in response to the current channel busy rate being greater than or equal to the channel busy rate threshold, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating target candidate starting symbols, so that the suitable target candidate starting symbols can be determined based on the current channel busy rate, and further, the suitable transmission block size is determined, and data transmission from the sending terminal equipment to the receiving terminal equipment is carried out on the first time slot resource according to the transmission block size, so that the resource utilization rate of the time slot resource can be improved.

Referring to fig. 6, fig. 6 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The specified criterion is that the target candidate starting symbol is determined to be the first candidate starting symbol in the first time slot resource under the condition that the first time slot resource is positioned in the channel occupation time COT of other terminal equipment except the transmitting terminal equipment; and under the condition that the first time slot resource is not located in the COT of other terminal equipment, determining the target candidate starting symbol as a second candidate starting symbol in the first time slot resource. Correspondingly, as shown in fig. 6, the method may include, but is not limited to, the following steps:

step S601: and determining the target candidate start symbol as a first candidate start symbol in the first time slot resource in response to the first time slot resource being located within the channel occupation time COT of other terminal devices except the transmitting terminal device.

Step S602: and in response to the first time slot resource not being located in the COT of the other terminal equipment, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

In the embodiment of the present application, the first timeslot resource is a timeslot resource selected or allocated for the transmitting terminal device. Correspondingly, in the case that the transmitting terminal device selects or is allocated with a slot resource, for each slot resource selected or allocated by the transmitting terminal device, step S601 or step S602 is performed to determine a target mutual selection start symbol in the slot resource.

In the embodiment of the present application, for each time slot resource selected or allocated by the transmitting terminal device, the transmitting terminal device may determine whether the time slot resource is located in the COT of the other terminal device based on the following procedure: responding to the receiving of COT sharing information of other terminal equipment by the sending terminal equipment, determining that the residual COT comprises time slot resources based on the COT sharing information, and determining that the time slot resources are positioned in the COT of the other terminal equipment; and in response to the transmitting terminal device not receiving the COT sharing information, or based on the COT sharing information, determining that the time slot resources are not included in the remaining COTs, and determining that the time slot resources are not located in the COTs of the other terminal devices.

The remaining COT refers to COT in an idle state among COTs determined based on COT sharing information, that is, shared slot resources in an idle state among shared slot resources determined based on COT sharing information.

Step S603: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

According to the method for determining the size of the transmission block, the sending terminal equipment can determine that the target candidate starting symbol is the first candidate starting symbol in the first time slot resource in response to the first time slot resource being located in the channel occupation time COT of other terminal equipment except the sending terminal equipment; determining that the target candidate start symbol is a second candidate start symbol in the first time slot resource in response to the first time slot resource not being located in the COT of the other terminal equipment; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate starting symbol, so that the suitable target candidate starting symbol can be determined based on whether the first time slot resource is positioned in the channel occupation time COT of other terminal equipment, and further, the suitable transmission block size is determined, and the data transmission from the transmitting terminal equipment to the receiving terminal equipment is carried out on the first time slot resource according to the transmission block size, so that the resource utilization rate of the time slot resource can be improved.

Referring to fig. 7, fig. 7 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The specified criterion is that under the condition that the channel access Type executed before the first time slot resource acquired by the sending terminal equipment is Type 2A, type 2B or Type 2C, the target candidate starting symbol is determined to be the first candidate starting symbol in the first time slot resource; and under the condition that the channel access Type is Type1, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource. Correspondingly, as shown in fig. 7, the method may include, but is not limited to, the following steps:

Step S701: and determining the channel access type executed by the sending terminal equipment before the acquired first time slot resource.

In the embodiment of the present application, the first timeslot resource is a timeslot resource selected or allocated for the transmitting terminal device. The method for determining the channel access type executed by the sending terminal device before the acquired first time slot resource comprises at least one of the following steps: acquiring a channel access type carried in the side uplink control information (sidelink control information, SCI); acquiring a pre-configured or predefined channel access type; determining a channel access type according to the transmission time interval of the transmission terminal equipment; the transmission time interval is a time interval between transmission time points of two adjacent data transmissions.

Among them, the channel access Type is, for example, type 2A, type 2B, type 2C, type1, etc. In an example, the manner of determining the channel access type performed by the transmitting terminal device before the acquired first slot resource may be to acquire the channel access type carried in the SCI information. In another example, the manner of determining the channel access type performed by the transmitting terminal device before the acquired first time slot resource may be to acquire a pre-configured or predefined channel access type. In another example, the manner of determining the channel access type performed by the transmitting terminal device before the acquired first time slot resource may be to determine the channel access type according to a transmission time interval of the transmitting terminal device. The transmission time interval may be determined according to two adjacent data transmission time points of the sending terminal device, and may be an absolute value of a time difference value of the two adjacent data transmission time points.

For example, according to the transmission time interval of the transmitting terminal device, the process of determining the channel access Type may be, for example, determining that the channel access Type is Type 2C when the transmission time interval is less than or equal to 16 microseconds; under the condition that the transmission time interval is greater than or equal to 25 microseconds, determining that the channel access Type is Type 2A; in the case where the transmission time interval is less than 25 microseconds and more than 16 microseconds, the channel access Type is determined to be Type 2B.

Step S702: and determining that the target candidate start symbol is the first candidate start symbol in the first time slot resource in response to the channel access Type being Type 2A, type 2B or Type 2C.

Step S703: and in response to the channel access Type being Type1, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

In this embodiment of the present application, when the transmitting terminal device acquires the first timeslot resource, and when the channel access Type is Type 2A, type 2B, or Type 2C, the first candidate start symbol in each timeslot resource in the acquired first timeslot resource may be used as the target candidate start symbol in the timeslot resource; in the case that the channel access Type is Type1, the second candidate start symbol in each of the acquired first slot resources may be used as the target candidate start symbol in the slot resources.

Step S704: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

According to the method for determining the size of the transmission block, the transmitting terminal equipment can determine the channel access type executed by the transmitting terminal equipment before the acquired first time slot resource; determining that the target candidate starting symbol is a first candidate starting symbol in the first time slot resource in response to the channel access Type being Type 2A, type 2B or Type 2C; determining that the target candidate starting symbol is a second candidate starting symbol in the first time slot resource in response to the channel access Type being Type 1; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate starting symbol, so that the suitable target candidate starting symbol can be determined based on the channel access type executed before the first time slot resource acquired by the sending terminal equipment, and further, the suitable transmission block size is determined, and the data transmission from the sending terminal equipment to the receiving terminal equipment is carried out on the first time slot resource according to the transmission block size, so that the resource utilization rate of the time slot resource can be improved.

Referring to fig. 8, fig. 8 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The appointed criterion is that, under the condition that the first time slot resource is a plurality of continuous time slot resources, a target candidate start symbol in the first time slot resource is determined based on the current channel occupancy rate or the current channel busy rate of the side channel aiming at the first time slot resource in the plurality of continuous time slot resources; for other time slot resources of the plurality of consecutive time slot resources, except for the first time slot resource, determining the target candidate start symbol in the other time slot resources as the first candidate start symbol in the other time slot resources. Correspondingly, as shown in fig. 8, the method may include, but is not limited to, the following steps:

step S801: in response to the first slot resource being a plurality of consecutive slot resources, for a first slot resource of the plurality of consecutive slot resources, determining a target candidate start symbol in the first slot resource based on a current channel occupancy or a current channel busy rate of the sidelink channel.

In one example of the embodiment of the present application, the transmitting terminal device determines a target candidate start symbol in the first slot resource based on the current channel occupancy of the sidelink channel. Specifically, under the condition that the current channel occupancy rate is smaller than or equal to the channel occupancy rate threshold value, determining the target candidate starting symbol as a first candidate starting symbol in the first time slot resource; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource under the condition that the current channel occupancy is greater than or equal to the channel occupancy threshold.

In another example of the embodiment of the present application, the sending terminal device determines the target candidate start symbol in the first timeslot resource based on the current channel busy rate of the sidelink channel. Specifically, under the condition that the current channel busy rate is smaller than or equal to the channel busy rate threshold, determining the target candidate starting symbol as the first candidate starting symbol in the first time slot resource; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource in the case that the current channel busy rate is greater than or equal to the channel busy rate threshold.

Wherein, the sidestream channel may refer to at least one of the following: physical side uplink shared channel (Physical Sidelink Shared Channel, PSSCH), physical side uplink feedback channel (physical sidelink feedback channel, PSFCH), and the like.

Step S802: in response to the first slot resource being a plurality of consecutive slot resources, determining, for other slot resources of the plurality of consecutive slot resources than the first slot resource, a target candidate start symbol in the other slot resources as a first candidate start symbol in the other slot resources.

In addition, the transmitting terminal device may also perform the following procedure: in response to the first slot resource being a plurality of non-contiguous slot resources, or in response to the first slot resource being a single slot resource, for each of the first slot resources, determining a target candidate start symbol in the slot resource as a second candidate start symbol in the slot resource.

Step S803: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

According to the method for determining the size of the transmission block, provided by the embodiment of the application, the sending terminal equipment can respond to the fact that the first time slot resource is a plurality of continuous time slot resources, and for the first time slot resource in the plurality of continuous time slot resources, a target candidate starting symbol in the first time slot resource is determined based on the current channel occupancy rate or the current channel busy rate of the sidestream channel; in response to the first slot resource being a plurality of consecutive slot resources, determining, for other slot resources of the plurality of consecutive slot resources than the first slot resource, that a target candidate start symbol in the other slot resources is a first candidate start symbol in the other slot resources; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating target candidate starting symbols, so that the suitable target candidate starting symbols can be determined based on whether the first time slot resources are a plurality of continuous time slot resources, the current channel occupancy rate of the side channel or the current channel busy rate and the like, and further, the suitable transmission block size is determined, and the data transmission from the transmitting terminal equipment to the receiving terminal equipment is carried out on the first time slot resources according to the transmission block size, so that the resource utilization rate of the time slot resources can be improved.

Referring to fig. 9, fig. 9 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a transmitting terminal device. The specified criterion is that, in the case where the first time slot resource is a plurality of consecutive time slot resources, a target candidate start symbol in each of the plurality of consecutive time slot resources is determined in combination with whether the plurality of consecutive time slot resources are located within the COTs of the other terminal devices except the transmitting terminal device. Correspondingly, as shown in fig. 9, the method may include, but is not limited to, the following steps:

step S901: and in response to the first time slot resource being a plurality of continuous time slot resources, wherein the plurality of continuous time slot resources are all located in COTs of other terminal equipment except the transmitting terminal equipment, determining a target candidate start symbol in each time slot resource in the plurality of continuous time slot resources, and determining the first candidate start symbol in each time slot resource.

In the embodiment of the present application, the transmitting terminal device may determine whether a plurality of consecutive slot resources are located in the COT of the other terminal device based on the following procedure; responding to the COT sharing information received by other terminal equipment by the sending terminal equipment, determining that the plurality of continuous time slot resources are included in the residual COT based on the COT sharing information, and determining that the plurality of continuous time slot resources are positioned in the COT of the other terminal equipment; and in response to the transmitting terminal device not receiving the COT sharing information of the other terminal device, or determining that the plurality of continuous time slot resources are not included in the remaining COT based on the COT sharing information, or determining that only part of the plurality of continuous time slot resources are included in the remaining COT based on the COT sharing information, and determining that the plurality of continuous time slot resources are not located in the COT of the other terminal device.

Step S902: and in response to the first time slot resource being a plurality of continuous time slot resources, and some or all of the plurality of continuous time slot resources not being located within the COT of the other terminal device, determining a target candidate start symbol in each of the plurality of continuous time slot resources as a second candidate start symbol in each of the plurality of time slot resources.

In addition, the transmitting terminal device may also perform the following procedure: in response to the first slot resource being a plurality of non-contiguous slot resources, or in response to the slot resource being a single slot resource, for each slot resource in the first slot resource, determining a target candidate start symbol in the slot resource as a second candidate start symbol in the slot resource.

Step S903: and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

According to the method for determining the size of the transmission block, the transmitting terminal equipment can respond that the first time slot resource is a plurality of continuous time slot resources, the plurality of continuous time slot resources are all located in COTs of other terminal equipment except the transmitting terminal equipment, a target candidate starting symbol in each time slot resource in the plurality of continuous time slot resources is determined, and the target candidate starting symbol in each time slot resource is a first candidate starting symbol in each time slot resource; in response to the first time slot resource being a plurality of continuous time slot resources, and some or all of the plurality of continuous time slot resources not being located within the COT of the other terminal device, determining a target candidate start symbol in each of the plurality of continuous time slot resources, as a second candidate start symbol in each of the plurality of time slot resources; and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate starting symbol, so that the suitable target candidate starting symbol can be determined based on whether the first time slot resource is a plurality of continuous time slot resources or not and whether the plurality of continuous time slot resources are positioned in COTs of other terminal equipment or not, further a suitable transmission block size is determined, and data transmission from the transmitting terminal equipment to the receiving terminal equipment is carried out on the first time slot resource according to the transmission block size, thereby improving the resource utilization rate of the time slot resources.

Referring to fig. 10, fig. 10 is a flowchart of another method for determining a transport block size according to an embodiment of the present application. The method of determining the transport block size is performed by a receiving terminal device. As shown in fig. 10, the method may include, but is not limited to, the steps of:

step S1001: and receiving indication information of the sending terminal equipment, wherein the indication information is used for indicating target candidate starting symbols in first time slot resources of the sending terminal equipment, and the target candidate starting symbols are determined by the sending terminal equipment based on specified criteria.

In the embodiment of the present application, the first timeslot resource may be a timeslot resource selected or allocated for the transmitting terminal device. The candidate start symbols in the slot resources selected or allocated by the transmitting terminal device may be 2, respectively the first candidate start symbol and the second candidate start symbol. The target candidate start symbol may be the first candidate start symbol or may be the second candidate start symbol. The first candidate start symbol may be, for example, the first symbol in the slot resource, i.e., symbol 0. The second candidate start symbol may be, for example, the fifth or eighth symbol in the slot resource, i.e., symbol 4 or symbol 7.

Wherein, the calculation methods of the channel occupancy and the channel occupancy threshold reuse the calculation methods specified in R16. I.e. R16 terminal equipment (UE) in [ n-a, n+1 ]]Number of subchannels in range that have been used for transmitting data and [ n, n+b ]]The number of sub-channels included in the acquired sidelink grant within range is n-a, n + b]The ratio of the total number of sub-channels belonging to the resource pool in the range, wherein the value of a and b is determined by the UE. Time slot n refers to a time slot selected or allocated by the UE for transmitting data. Wherein CR is _Ｌimit (k) Transmitting the measured limit value of CR for the sidelink of priority k of the system configuration, k being a preconfigured value, Σ _i≥k CR(i)≤CE _Limit (k) And the CR sum corresponding to the through link transmission with the priority value not lower than k is smaller than or equal to the CR Limit value corresponding to the priority k.

In addition, in the case where the first slot resource is a plurality of discontinuous slot resources, or in the case where the slot resource is a single slot resource, the target candidate start symbol in the slot resource may be determined as the second candidate start symbol in the slot resource for each slot resource.

Step S1002: the transport block size carried in the first slot resource is determined based on the target candidate start symbol.

According to the method for determining the size of the transmission block, which is provided by the embodiment of the application, the receiving terminal equipment can receive the indication information of the sending terminal equipment, wherein the indication information is used for indicating the target candidate starting symbol in the first time slot resource of the sending terminal equipment, and the target candidate starting symbol is determined by the sending terminal equipment based on the specified criterion; the size of a transmission block carried in the first time slot resource is determined based on the target candidate start symbol, so that the proper size of the transmission block can be determined, and then data sent by the sending terminal equipment is received on the first time slot resource according to the size of the transmission block, so that the resource utilization rate of the time slot resource can be improved.

The following is a description of specific examples of the above-described method of determining the transport block size of the present disclosure.

The scheme is as follows: the UE (as the aforementioned transmitting terminal device) decides on the basis of which candidate start symbol to calculate the transport block size (TB size) according to the following criteria.

● Criterion 1: when the channel occupancy (channel occupancy ration, CR) is less than or equal to the threshold CR threshold, the transmitting UE calculates the TB size based on the first candidate start symbol, otherwise calculates the TB size based on the 2 nd candidate start symbol.

The CR calculation method reuses the calculation method in R16.

● Criterion 2: when the channel busy rate CBR (channel busy ration) is less than the threshold CBR threshold, the transmitting UE calculates the TB size based on the first candidate start symbol, otherwise calculates the TB size based on the 2 nd candidate start symbol.

-CBR calculation method reuse calculation method in R16

● Criterion 3: when the UE receives COT sharing information at slot N and obtains that the residual COT length is N slots, and the UE selects resources located at slot m, the slot m is located in COT [ slot N, slot n+N ], the TB transmitted at slot m is calculated by the UE based on the first candidate start symbol, otherwise, the TB size is calculated based on the 2 nd candidate start symbol.

● Criterion 4: the UE decides whether to calculate a TB size based on the first candidate start symbol or the second candidate start symbol according to a channel access type performed before the selected resource.

Example 4-1: two methods of calculating a TB size are preconfigured for a UE, namely, a TB size is calculated based on a first candidate start symbol or a TB size is calculated based on a second candidate start symbol, the calculation of the TB size is decided according to LBT type to be used by a transmitting UE before a selected resource, if LBT of type 2A/2B/2C is used, the transmitting UE decides to calculate the TB size using the first candidate start symbol, and if LBT of type 1 is used, the UE decides to calculate the TB size based on the 2 nd candidate start symbol.

-determination of the channel access type may be performed by:

information access type indicated in o decoding SCI

Channel access type preconfigured

The o transmitting UE determines the determined channel type according to the time interval between the last transmission and the last transmission, the time interval between the last transmission and the last transmission is greater than 25us, and the channel access type using type2A

● Criterion 5: when the UE selects consecutive M slot resources,

example 1: the transmitting UE decides the TB size based on the first candidate start symbol for all of the 2 nd to mth slots in the M slots and the TB size corresponding to the first slot in the M consecutive slots may use either criterion 1 or criterion 3 to decide whether to decide the TB size based on the first candidate start symbol or the second candidate start symbol.

Example 2: when the transmitting UE receives the COT sharing information at slot N and obtains that the remaining COT length is N slots, and the selected consecutive M slot resources are all in the COT, i.e., [ slot N, slot n+n ], the transmitting UE decides that TBs corresponding to the 1 st to M-th slots all decide TB size based on the first candidate start symbol.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are described from the perspective of the sending terminal device and the receiving terminal device, respectively. In order to implement the functions in the method provided in the embodiment of the present application, the transmitting terminal device and the receiving terminal device may include hardware structures, software modules, and implement the functions in the form of hardware structures, software modules, or a hardware structure plus a software module. Some of the functions described above may be implemented in a hardware structure, a software module, or a combination of a hardware structure and a software module.

Fig. 11 is a schematic structural diagram of a communication device 110 according to an embodiment of the present application. The communication device 110 shown in fig. 11 may include a transceiving unit 1101 and a processing unit 1102. The transceiver unit 1101 may include a transmitting unit for implementing a transmitting function and/or a receiving unit for implementing a receiving function, and the transceiver unit 1101 may implement the transmitting function and/or the receiving function.

The communication device 110 may be a terminal device (such as a transmitting terminal device or a receiving terminal device in the foregoing method embodiment), or may be a device in a terminal device, or may be a device that can be used in a matching manner with a terminal device.

The communication apparatus 110 is a terminal device (e.g. a transmitting terminal device in the foregoing method embodiment):

a processing unit 1102, configured to determine a target candidate start symbol in a first timeslot resource based on a specified criterion, where the target candidate start symbol is used for a receiving terminal device to determine a transport block size carried in the first timeslot resource;

a transceiver 1101, configured to send indication information to the receiving terminal device, where the indication information is used to indicate the target candidate start symbol.

Optionally, the specified criterion is that the target candidate start symbol is determined to be the first candidate start symbol in the first time slot resource under the condition that the current channel occupancy of the sidestream channel is less than or equal to a channel occupancy threshold; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource under the condition that the current channel occupancy is greater than or equal to the channel occupancy threshold.

Optionally, the specified criterion is that the target candidate start symbol is determined to be the first candidate start symbol in the first time slot resource under the condition that the current channel busy rate of the sidestream channel is less than or equal to a channel busy rate threshold value; or determining the target candidate start symbol as a second candidate start symbol in the first time slot resource when the current channel busy rate is greater than or equal to the channel busy rate threshold.

Optionally, the specified criterion is that the target candidate start symbol is determined to be the first candidate start symbol in the first time slot resource when the first time slot resource is located within the channel occupation time COT of other terminal devices except the sending terminal device; and under the condition that the first time slot resource is not located in the COT of the other terminal equipment, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

Optionally, the processing unit 1102 is further configured to, in response to the sending terminal device receiving the COT sharing information of the other terminal device, determine that the first time slot resource is included in the remaining COTs based on the COT sharing information, and determine that the first time slot resource is located in the COT of the other terminal device; and responding to the fact that the sending terminal equipment does not receive the COT sharing information, or determining that the first time slot resources are not included in the residual COT based on the COT sharing information, and determining that the first time slot resources are not located in COTs of other terminal equipment.

Optionally, the specified criterion is that, in a case that a channel access Type executed before the first timeslot resource acquired by the sending terminal device is Type 2A, type 2B, or Type 2C, the target candidate start symbol is determined to be a first candidate start symbol in the first timeslot resource; and under the condition that the channel access Type is Type1, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

Optionally, the method for acquiring the channel access type performed before the first time slot resource acquired by the sending terminal device includes at least one of the following: acquiring the channel access type carried in the side uplink control information SCI; acquiring a preconfigured or predefined channel access type; determining the channel access type according to the transmission time interval of the transmission terminal equipment; the transmission time interval is a time interval between transmission time points of two adjacent data transmissions.

Optionally, the specified criterion is that, in the case that the first time slot resource is a plurality of continuous time slot resources, for a first time slot resource in the plurality of continuous time slot resources, a target candidate start symbol in the first time slot resource is determined based on a current channel occupancy or a current channel busy rate of a sidestream channel; determining a target candidate starting symbol in other time slot resources as a first candidate starting symbol in the other time slot resources aiming at the other time slot resources except the first time slot resource in the plurality of continuous time slot resources; or, the specified criterion is that, in the case that the first time slot resource is a plurality of continuous time slot resources, a target candidate start symbol in each time slot resource of the plurality of continuous time slot resources is determined in combination with whether the plurality of continuous time slot resources are located in the COTs of other terminal devices except the transmitting terminal device.

Optionally, the determining a mode of the target candidate start symbol in each of the plurality of continuous time slot resources in combination with whether the plurality of continuous time slot resources are located in the COTs of other terminal devices except the sending terminal device includes: determining a target candidate start symbol in each time slot resource in the plurality of continuous time slot resources as a first candidate start symbol in each time slot resource in response to the plurality of continuous time slot resources being located in the COTs of other terminal devices; and determining a target candidate start symbol in each time slot resource in the plurality of continuous time slot resources as a second candidate start symbol in each time slot resource in response to that part or all of the time slot resources in the plurality of continuous time slot resources are not located in the COT of the other terminal equipment.

The communication device 110 is a terminal device (e.g. a receiving terminal device in the foregoing method embodiment):

a transceiver 1101, configured to receive indication information of a transmitting terminal device, where the indication information is used to indicate a target candidate start symbol in a first timeslot resource of the transmitting terminal device, where the target candidate start symbol is determined by the transmitting terminal device based on a specified criterion;

A processing unit 1102 is configured to determine a transport block size carried in the first timeslot resource based on the target candidate start symbol.

Referring to fig. 12, fig. 12 is a schematic structural diagram of another communication device 120 according to an embodiment of the present application. The communication device 120 may be a terminal device (such as a transmitting terminal device or a receiving terminal device in the foregoing method embodiment), or may be a chip, a chip system, or a processor that supports the terminal device to implement the foregoing method. The device can be used for realizing the method described in the method embodiment, and can be particularly referred to the description in the method embodiment.

The communication device 120 may include one or more processors 1201. The processor 1201 may be a general purpose processor, a special purpose processor, or the like. For example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminal equipment chips, DUs or CUs, etc.), execute computer programs, and process data of the computer programs.

Optionally, the communication device 120 may further include one or more memories 1202, on which a computer program 1204 may be stored, and the processor 1201 executes the computer program 1204, so that the communication device 120 performs the method described in the above method embodiments. Optionally, the memory 1202 may also store data. The communication device 120 and the memory 1202 may be provided separately or may be integrated.

Optionally, the communication device 120 may further include a transceiver 1205, an antenna 1206. The transceiver 1205 may be referred to as a transceiver unit, transceiver circuitry, or the like, for implementing a transceiver function. The transceiver 1205 may include a receiver, which may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

Optionally, one or more interface circuits 1207 may also be included in the communication device 120. The interface circuit 1207 is configured to receive code instructions and transmit the code instructions to the processor 1201. The processor 1201 executes the code instructions to cause the communication device 120 to perform the method described in the method embodiments described above.

The communication device 120 is a terminal device (e.g. a transmitting terminal device in the foregoing method embodiment): the processor 1201 is configured to perform step S201 in fig. 2; step S401 to step S403 in fig. 4; step S501 to step S503 in fig. 5; step S601 to step S602 in fig. 6; step S701 to step S703 in fig. 7; step S801 to step S802 in fig. 8; step S901 to step S902 in fig. 9. The transceiver 1205 is used to perform step S202 in fig. 2; step S404 in fig. 4; step S504 in fig. 5; step S603 in fig. 6; step S704 in fig. 7; step S803 in fig. 8; step S903 in fig. 9.

The communication device 120 is a terminal device (e.g. a receiving terminal device in the foregoing method embodiment): the transceiver 1205 is used to perform step S1001 in fig. 10. The processor 1201 is configured to perform step S1002 in fig. 10.

In one implementation, a transceiver for implementing the receive and transmit functions may be included in the processor 1201. For example, the transceiver may be a transceiver circuit, or an interface circuit. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 1201 may store a computer program 1203, where the computer program 1203 runs on the processor 1201, and may cause the communication apparatus 120 to perform the method described in the above method embodiment. The computer program 1203 may be solidified in the processor 1201, in which case the processor 1201 may be implemented in hardware.

In one implementation, the communication device 120 may include circuitry that may implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication apparatus described in the above embodiment may be a terminal device (a transmitting terminal device or a receiving terminal device as in the foregoing method embodiment), but the scope of the communication apparatus described in the present application is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 12. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) A set of one or more ICs, optionally including storage means for storing data, a computer program;

(3) An ASIC, such as a Modem (Modem);

(4) Modules that may be embedded within other devices;

(5) A receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligent device, and the like;

(6) Others, and so on.

For the case where the communication device may be a chip or a chip system, reference may be made to the schematic structural diagram of the chip shown in fig. 13. The chip shown in fig. 13 includes a processor 1301 and an interface 1302. Wherein the number of processors 1301 may be one or more, and the number of interfaces 1302 may be a plurality.

For the case where the chip is used to implement the function of the terminal device in the embodiment of the present application (e.g., the transmitting terminal device in the foregoing method embodiment):

an interface 1302, configured to send indication information to the receiving terminal device, where the indication information is used to indicate the target candidate start symbol.

For the case where the chip is used to implement the functions of the terminal device in the embodiment of the present application (e.g., the receiving terminal device in the foregoing method embodiment):

an interface 1302, configured to receive indication information of a transmitting terminal device, where the indication information is used to indicate a target candidate start symbol in a first timeslot resource of the transmitting terminal device, where the target candidate start symbol is determined by the transmitting terminal device based on a specified criterion.

Optionally, the chip further comprises a memory 1303, the memory 1303 being configured to store necessary computer programs and data.

Those of skill would further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation is not to be understood as beyond the scope of the embodiments of the present application.

The embodiment of the application further provides a communication system, which comprises the communication device as a terminal device (such as a transmitting terminal device in the foregoing method embodiment) in the foregoing embodiment of fig. 11, and the communication device as a terminal device (such as a receiving terminal device in the foregoing method embodiment) in the foregoing embodiment of fig. 12.

The present application also provides a readable storage medium having instructions stored thereon which, when executed by a computer, perform the functions of any of the method embodiments described above.

The present application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.

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

Those of ordinary skill in the art will appreciate that: the first, second, etc. numbers referred to in this application are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application, but also to indicate the sequence.

At least one of the present application may also be described as one or more, and a plurality may be two, three, four or more, and the present application is not limited thereto. In the embodiment of the present application, for a technical feature, the technical features of the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the technical features described by "first", "second", "third", "a", "B", "C", and "D" are not in sequence or in order of magnitude.

The correspondence relationship shown in each table in the present application may be configured or predefined. The values of the information in each table are merely examples, and may be configured as other values, which are not limited in this application. In the case of the correspondence between the configuration information and each parameter, it is not necessarily required to configure all the correspondence shown in each table. For example, in the table in the present application, the correspondence shown by some rows may not be configured. For another example, appropriate morphing adjustments, e.g., splitting, merging, etc., may be made based on the tables described above. The names of the parameters indicated in the tables may be other names which are understood by the communication device, and the values or expressions of the parameters may be other values or expressions which are understood by the communication device. When the tables are implemented, other data structures may be used, for example, an array, a queue, a container, a stack, a linear table, a pointer, a linked list, a tree, a graph, a structure, a class, a heap, a hash table, or a hash table.

Predefined in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

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

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

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

Claims

1. A method for determining a transport block size, applied to a transmitting terminal device, the method comprising:

determining a target candidate start symbol in a first time slot resource based on a specified criterion, wherein the target candidate start symbol is used for a receiving terminal device to determine the size of a transmission block carried in the first time slot resource;

and sending indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

2. The method of claim 1, wherein the specified criterion is that the target candidate start symbol is determined to be a first candidate start symbol in the first slot resource if a current channel occupancy of a sidelink channel is less than or equal to a channel occupancy threshold; or alternatively, the process may be performed,

and under the condition that the current channel occupancy rate of the sidestream channel is greater than or equal to the channel occupancy rate threshold value, determining the target candidate starting symbol as a second candidate starting symbol in the first time slot resource.

3. The method of claim 1, wherein the specified criteria is that the target candidate start symbol is determined to be the first candidate start symbol in the first slot resource if a current channel busy rate for a sidelink channel is less than or equal to a channel busy rate threshold; or alternatively, the process may be performed,

And determining the target candidate starting symbol as a second candidate starting symbol in the first time slot resource under the condition that the current channel busy rate of a side channel is greater than or equal to the channel busy rate threshold.

4. The method according to claim 1, wherein the specified criterion is that the target candidate start symbol is determined to be a first candidate start symbol in the first slot resource in case that the first slot resource is located within a channel occupation time COT of a terminal device other than the transmitting terminal device;

and under the condition that the first time slot resource is not located in the COT of the other terminal equipment, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

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

responding to the receiving of COT sharing information of other terminal equipment by the sending terminal equipment, determining that the first time slot resources are included in the residual COT based on the COT sharing information, and determining that the first time slot resources are located in the COT of the other terminal equipment;

and in response to the sending terminal device not receiving the COT sharing information, or based on the COT sharing information, determining that the first time slot resource is not included in the remaining COTs, and determining that the first time slot resource is not located in the COTs of the other terminal devices.

6. The method according to claim 1, wherein the specified criterion is that, in a case where a channel access Type performed before the first slot resource acquired by the transmitting terminal device is Type 2A, type 2B, or Type 2C, the target candidate start symbol is determined to be a first candidate start symbol in the first slot resource;

and under the condition that the channel access Type is Type1, determining the target candidate start symbol as a second candidate start symbol in the first time slot resource.

7. The method according to claim 6, wherein the method for acquiring the channel access type performed before the first time slot resource acquired by the transmitting terminal device includes at least one of:

acquiring the channel access type carried in the side uplink control information SCI;

acquiring a preconfigured or predefined channel access type;

determining the channel access type according to the transmission time interval of the transmission terminal equipment; the transmission time interval is a time interval between transmission time points of two adjacent data transmissions.

8. The method of claim 1, wherein the specified criterion is that, in the case where the first time slot resource is a plurality of consecutive time slot resources, for a first time slot resource of the plurality of consecutive time slot resources, a target candidate start symbol in the first time slot resource is determined based on a current channel occupancy or a current channel busy rate of a sidestream channel;

Determining a target candidate starting symbol in other time slot resources as a first candidate starting symbol in the other time slot resources aiming at the other time slot resources except the first time slot resource in the plurality of continuous time slot resources;

or alternatively, the process may be performed,

the specified criterion is that, in the case that the first time slot resource is a plurality of continuous time slot resources, a target candidate start symbol in each time slot resource of the plurality of continuous time slot resources is determined in combination with whether the plurality of continuous time slot resources are located in the COTs of other terminal devices except the transmitting terminal device.

9. The method of claim 8, wherein the determining the manner in which the target candidate start symbol in each of the plurality of consecutive time slot resources is within the COT of the other terminal device than the transmitting terminal device comprises:

determining a target candidate start symbol in each time slot resource of the plurality of continuous time slot resources as a first candidate start symbol in each time slot resource in response to the plurality of continuous time slot resources being located within the COT of the other terminal device;

And determining a target candidate start symbol in each time slot resource in the plurality of continuous time slot resources as a second candidate start symbol in each time slot resource in response to that part or all of the time slot resources in the plurality of continuous time slot resources are not located in the COT of the other terminal equipment.

10. A method for determining a transport block size, applied to a receiving terminal device, the method comprising:

receiving indication information of a sending terminal device, wherein the indication information is used for indicating a target candidate starting symbol in a first time slot resource of the sending terminal device, and the target candidate starting symbol is determined by the sending terminal device based on a specified criterion;

and determining the size of the transmission block carried in the first time slot resource based on the target candidate start symbol.

11. A communication apparatus provided in a transmitting terminal device, the apparatus comprising:

a processing unit, configured to determine a target candidate start symbol in a first timeslot resource based on a specified criterion, where the target candidate start symbol is used for a receiving terminal device to determine a transport block size carried in the first timeslot resource;

And the receiving and transmitting unit is used for transmitting indication information to the receiving terminal equipment, wherein the indication information is used for indicating the target candidate start symbol.

12. A communication apparatus provided in a receiving terminal device, the apparatus comprising:

a transceiver unit, configured to receive indication information of a transmitting terminal device, where the indication information is used to indicate a target candidate start symbol in a first timeslot resource of the transmitting terminal device, where the target candidate start symbol is determined by the transmitting terminal device based on a specified criterion;

and the processing unit is used for determining the size of the transmission block carried in the first time slot resource based on the target candidate start symbol.

13. A communication device, characterized in that the device comprises a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method according to any of claims 1 to 9.

14. A communication device, characterized in that the device comprises a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method of claim 10.

15. A communication device, comprising: a processor and interface circuit;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;

the processor for executing the code instructions to perform the method of any one of claims 1 to 9.

16. A communication device, comprising: a processor and interface circuit;

the processor is configured to execute the code instructions to perform the method of claim 10.

17. A computer readable storage medium storing instructions which, when executed, cause the method of any one of claims 1 to 9 to be implemented.

18. A computer readable storage medium storing instructions which, when executed, cause the method of claim 10 to be implemented.