CN114586390A

CN114586390A - Resource indication method, resource determination method and device

Info

Publication number: CN114586390A
Application number: CN202280000223.0A
Authority: CN
Inventors: 赵文素
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-03
Also published as: WO2023137763A1

Abstract

The embodiment of the application discloses a resource indication method, a resource determination method and a device thereof, which can be applied to a terminal direct connection communication technology on an unauthorized frequency band, and the method comprises the following steps: the first terminal equipment sends first-stage direct link control information (SCI) to second terminal equipment based on the frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate frequency domain resources occupied by the first terminal device. By implementing the embodiment of the application, the OCB requirement can be met on the unauthorized frequency band, so that potential diversified application scenes and requirements in the future can be met.

Description

Resource indication method, resource determination method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a resource indication method, a resource determination method, and apparatuses thereof.

Background

At present, the requirements of new applications of various new services are continuously generated, and the performance requirements of terminal direct connection communication (also called Sidelink, SL) on transmission broadband, communication speed domain, communication delay, reliability, expandability and the like are higher and higher, and if only depending on limited authorized spectrum of an operator, the potential diversified application scenes and requirements in the future cannot be met, so that research and design of a terminal direct connection communication (SL-U) technology capable of being applied to an unauthorized frequency band are required.

However, there is no effective means for resource indication in the SL-U system.

Disclosure of Invention

The embodiment of the application provides a resource indication method, a resource determination method and a device thereof, which can be applied to an SL-U system, and can meet the OCB requirement on an unauthorized frequency band by a resource allocation indication mode of allocating granularity for frequency domain resources based on a subchannel or a comb-tooth resource block IRB in a first-stage SCI, thereby meeting potential diversified application scenes and requirements in the future.

In a first aspect, an embodiment of the present application provides a resource indication method, which is applied to an unlicensed frequency band for terminal direct connection communication, where the method is executed by a first terminal device, and the method includes:

sending first-stage direct link control information (SCI) to second terminal equipment based on the frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device.

In the technical scheme, the OCB requirement can be met on an unauthorized frequency band by a resource allocation indication mode of allocating granularity for frequency domain resources based on a subchannel or a comb-tooth resource block IRB in the first-stage SCI, so that potential diversified application scenes and requirements in the future can be met.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the sending the first-stage direct link control information SCI to the second terminal device based on the frequency domain resource allocation granularity includes:

determining a mapping relation between the sub-channel and a comb-tooth resource block IRB;

and sending the first-stage SCI to the second terminal equipment based on the sub-channel frequency domain resource allocation granularity and the mapping relation.

In a possible implementation manner, the determining a mapping relationship between the sub-channel and a comb resource block IRB includes:

and determining the mapping relation between the sub-channel and the IRB as that one sub-channel corresponds to one IRB index, wherein the number of the sub-channels and the IRB indexes included in a given Listen Before Talk (LBT) sub-band is the same.

determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein, a given LBT sub-band comprises M sub-channels and N IRB indexes, and M, N are positive integers respectively.

In one implementation, the frequency domain resource allocation granularity is IRB; the sending the first-stage direct link control information SCI to the second terminal device based on the frequency domain resource allocation granularity includes:

sending a first stage SCI to a second terminal device based on the IRB for frequency domain resource allocation granularity;

the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

In one possible implementation manner, the frequency domain resource allocation field includes a first portion, the first portion is used to indicate the number and/or position of IRB indexes occupied by a Sidelink transmission within one LBT subband, the first portion includes X bits, and X is a positive integer.

In a possible implementation manner, X is L-1, L is the number of IRB indexes included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation; alternatively, X is [ log ]₂(L)]The L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexesAnd the frequency domain resource allocation supports continuous IRB index allocation.

In a possible implementation manner, X is L, where L is the number of IRB indexes included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is positioned on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports the allocation of discrete IRB indexes; or, X is

The L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein the direct link control information SCI is located on a non-lowest IRB index among the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

In one implementation, the frequency-domain resource allocation field further includes a second portion, where the second portion is used to indicate the number and/or location of LBT subbands occupied by Sidelink transmission, and the second portion includes Y bits, where Y is a positive integer.

In one possible implementation, Y is

The K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and is a positive integer; the frequency domain resource allocation supports resource allocation of a continuous resource block set and supports SCI to reserve 1 time of resources; or, Y is

The K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and is a positive integer; wherein, the frequency domain resource allocation supports the resource allocation of a continuous resource block set and supports SCI to reserve 2 times of resources.

In one possible implementation, the Y is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein, the frequency domain resource allocation supports the resource allocation of a discrete resource block set and supports SCI to reserve 1 time of resources; or, Y is 3K-1; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein the frequency domain resource allocation supports resource allocation of a discrete set of resource blocks and supports SCI reservation of resources 2 times.

In a possible implementation manner, the first stage SCI further includes a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 1 st resource, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 2 nd resource; wherein the first offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

In a possible implementation manner, the first-stage SCI further includes a second offset field, where the second offset field is used to indicate an offset of each resource block set in the reserved 1 st resource with respect to an IRB index in a corresponding resource block set in the first-time transmitted resource, or indicate an offset of each resource block set in the reserved 2 nd resource with respect to an IRB index in a corresponding resource block set in the first-time transmitted resource; wherein the second offset field has a bit number of [ log ]₂(L)](ii) a Wherein, the L is the number of IRB indexes included in one LBT sub-band.

In one possible implementation, the frequency domain resource allocation supports an offset of the IRB index of the cycle.

In a second aspect, an embodiment of the present application provides a resource determination method, which is applied to a terminal direct connection communication unlicensed frequency band, where the method is executed by a second terminal device, and the method includes:

receiving first-stage direct link control information (SCI) sent by a first terminal device based on frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device;

determining the frequency domain resources occupied by the first terminal equipment according to the first-stage SCI and the frequency domain resource allocation granularity;

and determining the frequency domain resources available for the second terminal equipment according to the frequency domain resources occupied by the first terminal equipment.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the receiving the first-stage direct link control information SCI sent by the first terminal device based on the frequency domain resource allocation granularity includes: determining a mapping relation between the sub-channel and a comb-shaped resource block IRB; and receiving the first-stage SCI sent by the first terminal equipment based on the sub-channel for the frequency domain resource allocation granularity and the mapping relation.

In a possible implementation manner, the determining a mapping relationship between the sub-channel and a comb resource block IRB includes: and determining the mapping relation between the sub-channel and the IRB as that one sub-channel corresponds to one IRB index, wherein the number of the sub-channels and the IRB indexes included in a given Listen Before Talk (LBT) sub-band is the same.

In a possible implementation manner, the determining a mapping relationship between the sub-channel and a comb resource block IRB includes: determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein a given LBT subband includes M subchannels and N IRBs, and M, N are positive integers respectively.

In one implementation, the frequency domain resource allocation granularity is IRB; the receiving the first-stage direct link control information SCI sent by the first terminal device based on the frequency domain resource allocation granularity includes: receiving a first stage SCI sent by a first terminal device for frequency domain resource allocation granularity based on the IRB; the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

In a possible implementation manner, X is L-1, L is the number of IRB indexes included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation; alternatively, X is [ log ]₂(L)]The L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein the direct link control information SCI is located on the lowest IRB index among the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

In a possible embodimentIn this mode, Y is

In a possible implementation manner, the first stage SCI further includes a second offset field, where the second offset field is used to indicate that each resource block set in the reserved 1 st resource is relative to the resource of the initial transmissionOr indicating the offset of each resource block set in the reserved 2 nd time resource relative to the IRB index in the corresponding resource block set in the first transmission resource; wherein the second offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

In one possible implementation, the frequency domain resource allocation supports an offset of an IRB index of a cycle.

In a third aspect, an embodiment of the present application provides a communication device, which is applied to a terminal direct connection communication unlicensed frequency band, where the communication device includes:

the receiving and sending module is used for sending the first-stage direct link control information SCI to the second terminal equipment based on the frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the communication apparatus further includes:

the processing module is used for determining the mapping relation between the sub-channel and the comb-shaped resource block IRB;

the transceiver module is configured to send the first-stage SCI to the second terminal device based on the mapping relationship and the granularity of frequency-domain resource allocation based on the sub-channel.

In one possible implementation, the processing module is configured to: and determining the mapping relation between the sub-channel and the IRB as that one sub-channel corresponds to one IRB index, wherein the number of the sub-channels and the IRB indexes included in a given Listen Before Talk (LBT) sub-band is the same.

In one possible implementation, the processing module is configured to: determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein a given LBT subband includes M subchannels and N IRB indices, and wherein M, N are positive integers respectively.

In one implementation, the frequency domain resource allocation granularity is IRB; the transceiver module is used for: sending a first stage SCI to a second terminal device based on the IRB for frequency domain resource allocation granularity; the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

L is oneThe number of IRB indices included within each LBT subband, L being a positive integer; wherein the direct link control information SCI is located on a non-lowest IRB index among the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

In one possible implementation, Y is

In a possible implementation manner, the first stage SCI further includes a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate a reserved resource 1 for the first timeAn offset of an IRB index in an adjacent resource block set, or an offset of an IRB index in an adjacent resource block set in an indication reserved 2 nd time resource; wherein the first offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

In a possible implementation manner, the first-stage SCI further includes a second offset field, where the second offset field is used to indicate an offset of each resource block set in the reserved 1 st resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource, or indicate an offset of each resource block set in the reserved 2 nd resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource; wherein the second offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

In a fourth aspect, an embodiment of the present application provides another communication device, where the communication device is applied to a terminal direct connection communication unlicensed frequency band, and the communication device includes:

the receiving and sending module is used for receiving first-stage direct link control information (SCI) sent by the first terminal equipment based on the frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device;

and the processing module is configured to determine, according to the first-stage SCI and the frequency domain resource allocation granularity, the frequency domain resource occupied by the first terminal device, and determine, according to the frequency domain resource occupied by the first terminal device, the frequency domain resource available to the second terminal device.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the processing module is further configured to: determining a mapping relation between the sub-channel and a comb-shaped resource block IRB; the transceiver module is configured to receive a first-stage SCI sent by the first terminal device based on the sub-channel for the frequency domain resource allocation granularity and the mapping relationship.

In one possible implementation, the processing module is configured to: determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein a given LBT subband includes M subchannels and N IRBs, and M, N are positive integers respectively.

In one implementation, the frequency domain resource allocation granularity is IRB; the transceiver module is used for: receiving a first stage SCI sent by a first terminal device for frequency domain resource allocation granularity based on the IRB; the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

In one possible implementation, Y is

The K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and is a positive integer; the frequency domain resource allocation supports resource allocation of continuous resource block sets and supports SCI to reserve 1-time resource; or, said Y is

In one possible implementation, the Y is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports resource allocation of a discrete resource block set and supports SCI to reserve 1-time resource; or, Y is 3K-1; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein the frequency domain resource allocation supports resource allocation of a discrete set of resource blocks and supports SCI reservation of 2 times resources.

In a possible implementation manner, the first-stage SCI further includes a second offset field, where the second offset field is used to indicate an offset of each resource block set in the reserved 1 st resource with respect to an IRB index in a corresponding resource block set in the first-time transmitted resource, or indicate an offset of each resource block set in the reserved 2 nd resource with respect to an IRB index in a corresponding resource block set in the first-time transmitted resource; wherein the second offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor, and when the processor calls a computer program in a memory, the processor performs the method according to the first aspect.

In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor, and when the processor calls a computer program in a memory, the processor executes the method according to the second aspect.

In a seventh aspect, an embodiment of the present application provides a communication apparatus, including a processor and a memory, where the memory stores a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the first aspect.

In an eighth aspect, an embodiment of the present application provides a communication apparatus, including a processor and a memory, where the memory stores a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the method of the second aspect.

In a ninth aspect, embodiments of the present application provide a communication device, which includes a processor and an interface circuit, where the interface circuit is configured to receive code instructions and transmit the code instructions to the processor, and the processor is configured to execute the code instructions to cause the device to perform the method according to the first aspect.

In a tenth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and an interface circuit, where the interface circuit is configured to receive code instructions and transmit the code instructions to the processor, and the processor is configured to execute the code instructions to cause the apparatus to perform the method according to the second aspect.

In an eleventh aspect, the present invention provides a communication system, which includes the communication apparatus in the third aspect and the communication apparatus in the fourth aspect, or the system includes the communication apparatus in the fifth aspect and the communication apparatus in the sixth aspect, or the system includes the communication apparatus in the seventh aspect and the communication apparatus in the eighth aspect, or the system includes the communication apparatus in the ninth aspect and the communication apparatus in the tenth aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium, configured to store instructions for the terminal device, where the instructions, when executed, cause the terminal device to perform the method described in the first aspect.

In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions for the network device, where the instructions, when executed, cause the network device to perform the method of 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 computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a seventeenth 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 illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

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

fig. 2 is a flowchart of a resource indication method according to an embodiment of the present application;

fig. 3 is a first diagram illustrating a structure example of a comb resource block IRB according to an embodiment of the present application;

fig. 4 is a second exemplary diagram of a structure of a comb resource block IRB according to an embodiment of the present application;

FIG. 5 is a diagram illustrating a relationship between resource block set RB set and IRB index according to an embodiment of the present application;

fig. 6 is a flowchart of another resource indication method provided in an embodiment of the present application;

fig. 7 is an exemplary diagram of a mapping relationship between sub-channels and IRBs according to an embodiment of the present application;

FIG. 8 is a flowchart of another resource indication method provided in an embodiment of the present application;

FIG. 9 is an exemplary diagram of an embodiment of the present application with an SCI located at the lowest (i.e., starting) IRB index of the allocated IRB indexes;

FIG. 10 is an exemplary diagram of an embodiment of the present application with SCI located on the non-lowest (i.e., non-initial) IRB index of the allocated IRB indexes;

fig. 11 is a first exemplary diagram of frequency domain resource allocation according to an embodiment of the present application;

fig. 12 is a diagram of an example of frequency domain resource allocation according to an embodiment of the present application;

fig. 13 is a third exemplary diagram of frequency domain resource allocation according to an embodiment of the present application;

fig. 14 is a flowchart of a resource determination method provided in an embodiment of the present application;

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

fig. 16 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. Where in the description of the present application, "/" indicates an OR meaning, for example, A/B may indicate A or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

At present, the requirements of new applications of various new services are continuously generated, and the performance requirements of terminal direct connection communication (also called Sidelink, SL) on transmission bandwidth, communication rate, communication delay, reliability, expandability and the like are higher and higher, and if only depending on limited authorized spectrum of an operator, the potential diversified application scenes and requirements in the future cannot be met, so that research and design of a terminal direct connection communication (SL-U) technology capable of being applied to an unauthorized frequency band are needed.

In the unlicensed band, the OCB (occupied Bandwidth for the transmitted signal in the unlicensed spectrum) requirement needs to be satisfied, that is, each transmission needs to occupy 80% of the Bandwidth of the LBT (Listen before Talk, for example, 20 MHz). However, an effective means for resource indication is still lacking in the SL-U system.

Therefore, the resource indication method, the resource determination method and the device thereof are provided by the application, and can be applied to an SL-U system, and the OCB requirement can be met on an unauthorized frequency band through a resource allocation indication mode of allocating granularity to frequency domain resources based on a subchannel or a comb-tooth resource block IRB in a first stage SCI, for example, each transmission can occupy 80% of the bandwidth of an LBT sub-band, so that potential diversified application scenes and requirements in the future can be met.

In order to better understand a resource indication method, a resource determination method, and apparatuses thereof disclosed in the embodiments of the present application, first, a communication system used in the embodiments of the present application is described below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, a first terminal device and a second terminal device, the number and the form of the devices shown in fig. 1 are only examples and constitute a limitation to the embodiments of the present application, and in practical applications, two or more first terminal devices and two or more second terminal devices may be included. The communication system shown in fig. 1 is exemplified by including a first terminal apparatus 101 and a second terminal apparatus 102.

It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: a Long Term Evolution (LTE) system, a 5th generation (5G) mobile communication system, a 5G New Radio (NR) system, a SL-U system, or other future new mobile communication systems.

The first terminal device and the second terminal device in the embodiment of the present application are entities, such as mobile phones, on the user side for receiving or transmitting signals. The first terminal device and the second 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), and the like. The terminal device may be a vehicle having a communication function, a smart vehicle, 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 (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving (self-driving), a wireless terminal device in remote surgery (remote medical supply), 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), and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

It can be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows, with the evolution of the system architecture and the occurrence of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The resource indication method, the resource determination method, and the apparatus thereof provided by 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 resource indication method according to an embodiment of the present application. It should be noted that the resource indication method in the embodiment of the present application is applied to the terminal direct connection communication unlicensed frequency band, and the resource indication method may be executed by the first mobile terminal. As shown in fig. 2, the resource indication method may include, but is not limited to, the following steps.

In step 201, sending first-stage direct link control information SCI to a second terminal device based on a frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device.

In the embodiment of the present application, the frequency domain resource allocation granularity may be a subchannel or a comb resource block IRB.

It should be noted that, in the NR-U system, an Interleaved Resource Block (IRB) is introduced, that is, two consecutive comb Resource blocks are spaced by M Resource blocks, and for an IRB index M, a physical Resource Block PRB included in the system is { M, M + M,2M + M,3M + M, … }, where M belongs to {0,1, …, M-1 }. In the NR-U system, IRB structures are defined for two subcarrier spacings of 15kHz and 30kHz, respectively, as shown in the following table.

TABLE 4.4.4.6-1: number of resource block interlaces

μ	M
		0	10
1	5

For example, as shown in fig. 3, when SCS is 30khz and M is 5, 5 comb indices are shared, and for 1 IRB index, such as IRB index 0, the comb index includes PRB {0,5,10,15,20,25,30,35,40,45} for the comb resource block. As shown in fig. 4, when SCS is 15khz and M is 10, 10 comb indices are shared, and 100 PRBs are shared. For 1 IRB index, such as IRB index 0, the comb index contains PRB {0,10,20,30,40,50,60,70,80,90} for the comb resource block.

It should be further noted that the relationship between IRB and resource block set RB set is as follows: in NR-U, 1 LBT sub-band, i.e. 20MHZ, is collectively referred to as resource block Set RB-Set, the entire carrier bandwidth is divided into a plurality of resource block sets, the network maps the resource block sets to BWPs by configuring a partial bandwidth BWP, and the protocol specifies that the BWP configured by the network must contain an integer number of resource block sets. As shown in fig. 5, one resource block set RB set includes a plurality of IRB indexes, which is a relationship between the resource block set RB set and the IRB indexes.

In an embodiment of the present application, the first terminal device may determine a frequency domain resource allocation granularity. The frequency domain resource allocation granularity may be a subchannel or may also be a comb resource block IRB. For example, the first terminal device may reuse the original subchannel (subchannel) -based frequency-domain resource indication manner in SCI 1-a (i.e., the first-stage SCI) to increase the design of the mapping from the subchannel to the IRB. That is to say, the first terminal device may reuse the original frequency domain resource indication manner based on the sub-channel in the first stage SCI, where the mapping relationship between the sub-channel and the IRB needs to be determined, that is, the resource indication of the frequency domain resource allocation granularity based on the sub-channel may be implemented. The IRB is a distributed PRB set with equal intervals, and the sub-channel is a continuous PRB set.

In an embodiment of the present application, the first terminal device may send the first-stage SCI to the second terminal device based on the determined granularity of frequency domain resource allocation. For example, the bandwidth portion BWP may be divided according to the size of the BWP and the frequency resource allocation granularity to obtain N units, and the first-stage SCI is sent to the second terminal device, where the first-stage SCI may include a frequency resource allocation field, and the frequency resource allocation field is used to indicate a unit allocated to the first terminal device in the N units, that is, indicate a frequency resource occupied by the first terminal device.

By implementing the embodiment of the application, the OCB requirement can be met on an unauthorized frequency band through a resource allocation indication mode of allocating granularity to the frequency domain resource based on the sub-channel or comb-tooth resource block IRB in the first-stage SCI, so that potential diversified application scenes and requirements in the future can be met.

It is noted that, in the first stage SCI, the original frequency domain resource indication method based on the sub-channel may be reused, where a mapping relationship between the sub-channel and the IRB needs to be determined, that is, the resource indication of the frequency domain resource allocation granularity based on the sub-channel may be implemented. Optionally, in some embodiments of the present application, fig. 6 is a flowchart of another resource indication method provided in the embodiments of the present application. It should be noted that the resource indication method in the embodiment of the present application is applied to the terminal direct connection communication unlicensed frequency band, and the resource indication method may be executed by the first terminal device. As shown in fig. 6, the resource indication method may include, but is not limited to, the following steps.

In step 601, a mapping relationship between a subchannel and a comb resource block IRB is determined.

In step 602, the first-stage SCI is sent to the second terminal device based on the granularity of frequency-domain resource allocation and the mapping relationship of the sub-channels.

That is, the present application may reuse the original frequency domain resource indication manner based on sub-channels in the first stage SCI, where the mapping relationship between sub-channels and IRBs needs to be determined.

In one implementation, the mapping relationship between the sub-channels and the IRB may be determined by: determining a mapping relationship between a sub-channel and an IRB as that one sub-channel corresponds to one IRB index, wherein the number of the sub-channels and the IRB indexes included in a given Listen Before Talk (LBT) sub-band is the same.

For example, assuming that the number of subchannels and IRB indices included in a given LBT subband (e.g., 20MHz) is the same, it may be determined that the mapping relationship between the subchannels and the IRBs is a one-to-one mapping relationship, i.e., 1 IRB index is mapped to 1 subchannel.

For example, as shown in fig. 7, the SCS is 30kHz, assuming that 50 PRBs are shared in 1 LBT subband (e.g. 20MHz), and 1 subchannel includes 10 PRBs, 5 subchannels are shared, and 5 IRB indexes (i.e. IRB indexes) are shared, the number of subchannels and IRB indexes is the same, and 1 subchannel is mapped to each IRB index, so that one subchannel corresponds to one IRB index.

In one possible implementation, the mapping relationship between the sub-channels and the comb resource blocks IRB may be determined by: determining the mapping relation between the sub-channels and the IRBs, namely that each physical resource block PRB in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; where a given LBT subband includes M subchannels and N IRB indices, M, N are each positive integers.

For example, assuming that a given LBT subband includes M subchannels and N IRBs (where M ≠ N), a 1-to-1 mapping rule of consecutive resource blocks RB within an LBT subband to distributed PRBs within the subband may be established, according to which each physical resource block PRB within a subchannel is mapped onto a specific PRB within a plurality of IRBs.

In the embodiment of the present application, after determining the mapping relationship between the sub-channel and the IRB, the first-stage SCI may be sent to the second terminal device based on the mapping relationship and the granularity of frequency-domain resource allocation with the sub-channel as the frequency-domain resource, where the first-stage SCI may include a frequency-domain resource allocation field, and the frequency-domain resource allocation field is used to indicate the frequency-domain resources occupied by the first terminal device. That is, after determining the mapping relationship between the IRBs, the first terminal device may continue to use the original subchannel-based frequency-domain resource indication manner in the first-stage SCI.

By implementing the embodiment of the application, after determining the mapping relationship between the sub-channel and the IRB, the first terminal device may reuse the original sub-channel-based frequency domain resource indication manner in the first-stage SCI, so as to indicate the frequency domain resource occupied by the first terminal device to the second terminal device, and may satisfy the OCB requirement on the unlicensed frequency band, for example, each transmission may occupy 80% of the LBT sub-band bandwidth, and may better ensure the resource utilization rate, thereby being able to satisfy the potential diversified application scenarios and requirements in the future.

It is noted that the present application may perform resource indication for the granularity of frequency domain resource allocation based on IRB. In some embodiments of the present application, fig. 8 is a flowchart of another resource indication method provided in embodiments of the present application. It should be noted that the resource indication method in the embodiment of the present application may be applied to the terminal direct connection communication unlicensed frequency band, and the resource indication method may be executed by the first terminal device. As shown in fig. 8, the resource indication method may include, but is not limited to, the following steps.

In step 801, a first-stage SCI is sent to a second terminal device based on IRB for frequency domain resource allocation granularity.

In the embodiment of the present application, the frequency domain resource allocation field in the first-stage SCI is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the first time direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

In an embodiment of the present application, the first terminal device may determine that the frequency domain resource allocation granularity is comb-tooth resource blocks IRB. That is, the present application may redesign the frequency domain resource allocation field in SCI 1-a (i.e., the first-stage SCI), i.e., perform resource indication for the frequency domain resource allocation granularity based on IRB. That is to say, in the embodiment of the present application, the frequency domain resource allocation field in SCI 1-a (i.e. the first-stage SCI) does not perform resource indication for the frequency domain resource allocation granularity based on the sub-channel any more, but performs resource indication for the frequency domain resource allocation granularity based on the IRB.

In an implementation manner, a first terminal device may divide a bandwidth part BWP according to the size of the BWP and a granularity allocated to frequency domain resources by using an IRB, obtain N units, and send a first-stage SCI to a second terminal device, where the first-stage SCI may include a frequency domain resource allocation domain, and the frequency domain resource allocation domain is used to indicate the size and/or position of a frequency domain resource for the first terminal device for the first time direct connection communication sildenk transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication sildenk resource.

That is, the sub-channels are consecutive PRB sets, and it is assumed that 1 sub-channel contains consecutive PRBs of N number, IRB is a distributed PRB set of equal interval, and the number of resource blocks between two consecutive comb resource blocks is M. In the embodiments of the present application, the design of Rel-16 NR may be followed, and the frequency domain resource allocation field in SCI indicates the size and/or position of the frequency domain resource for the initial Sidelink transmission, and the starting position and size of the frequency domain resource for reserving the Sidelink resource.

For example, assuming that the number of IRB indices (i.e., IRB indices) contained in each LBT sub-band is the same, the frequency-domain resource allocation domain includes a first portion, where the first portion may indicate the number and/or position of IRB indices within 1 LBT sub-band (i.e., resource block set RB set) occupied by sidelink transmission, assuming that X bits are included, and X is a positive integer; optionally, the frequency domain resource allocation field may further include a second portion, which may indicate the number and/or position of LBT sub-bands (i.e. resource block set RB set) occupied by the Sidelink transmission, assuming that Y bits are included, Y being a positive integer. Alternatively, when there is only one LBT subband, then the frequency-domain resource allocation domain may contain only X bits. For example, when Y is 0, it indicates that one LBT subband (i.e., resource block set) is allocated.

It should be noted that, if the design of the frequency domain resource allocation domain is different in SCI 1-a (i.e., the first stage SCI), the number of bits of the first partition and the second partition may also be different. In the following, implementations for determining the number X of bits of the first part and the number X of bits of the second part, respectively, will be given.

In one implementation, the number of bits X of the first portion may be L-1, where L is the number of IRB indexes included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation. As an example, the present application may reuse the design method of R16, support SCI to be located at the lowest (i.e., initial) IRB index among the allocated IRB indexes, and frequency domain resource allocation support discrete IRB index allocation, and may determine that the number of bits X of the first part may be L-1.

It can be understood that, because the SCI is located at the lowest IRB index among the allocated IRB indexes, the terminal device can know the location of the starting IRB index of the allocated frequency domain resource by blindly detecting the SCI, and therefore, the location of the initially transmitted starting IRB index does not need to be indicated in the frequency domain resource allocation field of SCI 1-a. For example, as shown in fig. 9, {1,2,3}3 IRB indices are allocated to the psch, where the PSCCH carries the control information SCI 1-a at the lowest (i.e., starting) IRB index, i.e., IRB index 1.

For example, assuming that the design method of R16 is reused in the present application, SCI is supported to be located at the lowest (i.e. initial) IRB index among the allocated IRB indexes, and frequency domain resource allocation supports discrete IRB index allocation, a bitmap may be used to indicate whether only IRB indexes higher than the allocated initial IRB index are occupied in SCI 1-a; the number of bits X in the first part of SCI 1-A is then L-1.

As an example, assuming that the 20MHz sub-band has 5 IRB indexes {0,1,2,3,4}, that is, L is 5,3 IRBs of {1,3,4} are allocated to the first terminal device UE, and the lowest IRB index of the allocated IRBs is 1, so it is only necessary to indicate whether 3 IRBs of

indexes

2,3,4 are occupied, "011" 3 bits (where the IRB indexes are 2,3,4 corresponding to the upper bits from the upper bits to the lower bits), if 3 IRB indexes of {0,1,4} are allocated to the first terminal device UE, where the lowest IRB index of the allocated IRBs is 0,4 bits "1001" (where the IRB indexes are 1,2,3,4 corresponding to the upper bits to the lower bits) are needed to indicate the allocated IRB index, according to the above analysis, a total L IRB sub-band is set, so L-1 bits are needed to indicate. (although not as many bits are needed if the occupied IRB is not IRB index 0, the size of the information field in SCI should not change dynamically, but only take the maximum value L-1).

In one implementation, the number of bits X of the first part is [ log ]₂(L)]L is the number of IRB indices included in one LBT subband, L being a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation. As an example, the present application may reuse the design method of R16, support SCI on the lowest (i.e. starting) IRB index among the allocated IRB indexes, and frequency domain resource allocation supports continuous IRB index allocation, and may determine the ratio of the first partThe specific number X may be [ log ]₂(L)]。

It can be understood that, because the SCI is located at the lowest IRB index among the allocated IRB indexes, the terminal device can know the location of the starting IRB index of the allocated frequency domain resource by blindly detecting the SCI, and therefore, the location of the initially transmitted starting IRB index does not need to be indicated in the frequency domain resource allocation field of SCI 1-a. For example, it is assumed that the design method of R16 is reused in the present application, SCI is supported to be located at the lowest (i.e. starting) IRB index among the allocated IRB indexes, and frequency domain resource allocation only supports continuous IRB index allocation, and the position of the starting IRB index occupied by initial transmission is not indicated in SCI 1-a, and only the number of the continuously occupied IRB indexes is indicated; in this case, the number of bits X in the first part of SCI 1-A is [ log ]₂(L)]. Wherein]"may mean rounding up. For example, if the number L of IRB indexes included in one LBT sub-band is 5, if the initial IRB index is 0, there are 5 possibilities of IRB lengths of 1,2,3,4,5, etc., and if the initial IRB index is 3, there are two possibilities of 1 (e.g., only IRB index 3 is occupied) and 2 (e.g.,

IRB index

3,4 is occupied), so there are at most L possibilities.

In one implementation, the number X of bits of the first portion is L, where L is the number of IRB indexes included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is located on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation.

As an example, the present application does not reuse the design method of R16, and the SCI may be located on the non-lowest (i.e. non-initial) IRB index in the allocated IRB index, which is the location where the initial IRB index of the initial transmission needs to be indicated (since the SCI is not located on the initial IRB index, the location of the initial IRB index cannot be obtained by blindly detecting the SCI, which is needed to indicate the initial IRB index). For example, as shown in fig. 10, 3 IRBs of {1,2,3} are allocated to the PSCCH, where the PSCCH carries the control information SCI 1-a at the IRB index that is not the lowest (i.e., not the start), i.e., IRB index 2.

For example, in response to the design method that does not reuse R16 in the present application, the SCI may be located on the non-lowest (i.e., non-initial) IRB index in the allocated IRB indexes, and the frequency-domain resource allocation supports discrete IRB index allocation, which may be indicated by using bitmap, where the number X of bits of the first part is L, which indicates the initial IRB index position and the occupied IRB number.

In one implementation, the number of bits X of the first part is

L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein, the direct link control information SCI is located on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

As an example, the present application does not reuse the design method of R16, and SCI may be located on the non-lowest (i.e. non-initial) IRB index in the allocated IRB index, which is the position where the initial IRB index of the initial transmission needs to be indicated (since SCI is not located on the initial IRB index, the position of the initial IRB index cannot be obtained by blindly detecting SCI, the initial IRB index needs to be indicated). For example, in response to the design method of the present application not reusing R16, SCI may be located on the IRB index that is not the lowest (i.e., not the initial) among the allocated IRB indexes, and the frequency-domain resource allocation supports continuous IRB index allocation, then the number of bits X of the first part may be determined

The IRB index start position and the number of consecutive IRBs occupied can be indicated.

It will be appreciated that the above description gives the way of determining the number of bits X of the first part in SCI 1-A, and the following description will give the way of determining the number of bits Y of the second part in SCI 1-A.

In the embodiment of the present application, the design idea of R16 NR-U can be followed, only resource allocation of consecutive RB sets is supported, and the bit number Y of the second part can be determined from two aspects of supporting SCI reservation of resources 1 time or supporting SCI reservation of resources 2 times.

In one implementation, the bits of the second partThe number Y can be

K is the number of resource block sets contained in the BWP of the direct connection communication bandwidth part, and is a positive integer; the frequency domain resource allocation supports resource allocation of continuous resource block sets and supports SCI to reserve 1 time of resources.

That is, the present application follows the design concept of R16 NR-U, and only supports resource allocation of continuous RB sets, and supports SCI to reserve 1 resource, and then determines the number of bits Y of the second part as

The number of starting RB set and 1 consecutive RB set for indicating reserved 1 time resource.

In one implementation, the number of bits Y of the second part is

K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports resource allocation of a continuous resource block set and supports SCI to reserve 2 times of resources.

That is, the present application uses the design concept of R16 NR-U, only supports resource allocation of continuous RB sets, and supports SCI to reserve resources for 2 times, and then determines the bit number Y of the second part as

Starting RB set and 1 consecutive RB set number for indicating reserved 2 resources.

In the embodiment of the application, the resource allocation of discrete RB sets is supported without following the design idea of R16 NR-U, and a bitmap indication can be used, wherein each bit indicates whether the RB set is occupied or not. The number of bits Y of the second part may be determined in the following in terms of whether SCI reservation 1 time resources are supported or SCI reservation 2 times resources are supported.

In one implementation, the number of bits Y of the second portion is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports resource allocation of a discrete resource block set and supports SCI reservation of 1-time resources.

That is to say, the application may support resource allocation of discrete RB sets without following the design concept of R16 NR-U, and support SCI to reserve 1 resource, and then may determine that the number of bits Y of the second portion is K-1+ K, which is used to indicate the RBset occupied by the transmission (but only indicates whether an RB set higher than the occupied RB set is occupied, so it is K-1 bit), and indicate the start position of the reserved 1 resource and the occupied RB set, which require K bits.

For example, SCI is supported to reserve 1 resource, it is determined that the number Y of bits of the second part is K-1+ K, and if K is 5, Y is 9, as shown in fig. 11, the first 4 bits "0011" in "001110001" indicate the RBset occupied by this transmission, the RB sets with the

sequence numbers

2,3, and 4 are occupied (since "0011" is whether the corresponding RB set with the

sequence numbers

1,2,3, and 4 is occupied, it indicates that the

sequence numbers

3 and 4 are occupied, since it indicates whether the RB set higher than the occupied RB set is occupied, it indicates that the RB set with the sequence number 2 is also occupied), and the last 5 bits "10011" indicate the RB set occupied by the reserved 1 resource using bitmap.

In one implementation, the number of bits Y of the second part is 3K-1; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein the frequency domain resource allocation supports resource allocation of a discrete set of resource blocks and supports SCI reservation of resources 2 times.

That is to say, the present application may not use the design idea of R16 NR-U, support resource allocation of discrete RB sets, and support SCI to reserve resources 2 times, and then may determine that the bit number Y of the second portion is 3K-1, which is used to indicate the RB set occupied by this transmission (but only indicates whether the RB set higher than the occupied RB set is occupied, so is K-1 bit), and simultaneously indicate the starting position of the reserved resource 1 and the number K bits of the occupied RB sets, and indicate the starting position of the reserved resource 2 times and the number K bits of the occupied RB sets.

For example, SCI is supported to reserve 2 times of resources, as shown in fig. 12, assuming that K is 5, the number Y of bits of the second part is determined to be 3K-1, i.e. 14 bits are used to indicate, for example, "00111000111100" is used to indicate the number of occupied RB sets 4 bits (e.g., "0011" of the first 4 bits in "00111000111100") of the current transmission, while indicating the starting position of the reserved 1 st time of resources and the number of occupied RB sets 5 bits (e.g., "10001" of the 5th bit to the 9 th bit in "00111000111100"), and indicating the starting position of the reserved 2 nd time of resources and the number of occupied RB sets 5 bits (e.g., "11100" of the last 5 bits in "00111000111100").

It should be noted that, in the embodiment of the present application, a new information field, alternatively referred to as IRB index offset field (IRB index offset), is introduced into SCI 1-a. In one implementation, the first stage SCI may further include a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 1 st resource, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 2 nd resource; wherein the number of bits of the first offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband. It should also be noted that the frequency domain resource allocation supports an offset of the IRB index of the loop.

For example, a first offset field (IRB index offset) is introduced in SCI 1-a, which is used to indicate an offset of an IRB index in an adjacent resource block set in the resource transmitted for the first time, or indicate an offset of an IRB index in an adjacent resource block set in the reserved resource 1 for the first time, or indicate an offset of an IRB index in an adjacent resource block set in the reserved resource 2 for the second time. Assuming that when the offset value of the first offset field is 0, the distribution rule of IRB indexes in RB set occupied by the resource for the first transmission is the same, or the distribution rule of IRB indexes in RB set occupied by the reserved resource for 1 time is the same, or the distribution rule of IRB indexes in RB set occupied by the reserved resource for 2 nd time is the same.

As an example, assuming that the offset of the first offset field has 5 possibilities of {0,1,2,3,4}, i.e. L possibilities, and 2 resource reservations are supported, in the resource of the initial transmission, 3 RB set {0,1,2} are allocated, wherein in the first RB set index 0 in the resource of the initial transmission, the distribution of IRB indexes is {1,2}, then the offset of IRB index in the second RB set index 1 in the resource of the initial transmission is 1 IRB index, one offset with respect to IRB index {1,2} in the first RB set, and the offset is 1 IRB index, the distribution of IRB index in the second RB set index 1 is {2,3}, the distribution of IRB index in the third RB set index 2 is {2,3} with respect to IRB index in the second RB set index 1, and the IRB index in the third RB set index 2 is also 1 IRB index, the distribution of IRB indexes in this third RB set index 2 is 3, 4. Likewise, for the first reserved resource, 3 RB sets {1,2,3} are also allocated, and among the three RB sets, in the first RB set index 1, the distribution of IRB indexes is {2,3 }; then, in the second RB set index 2, IRB index has one offset with respect to IRB index {2,3} in RB set with index 1, and the offset is 1 IRB index, so the distribution of IRB indexes in RB set index 2 is {3,4}, IRB index in RB set index 3 has 1 offset with respect to IRB index {3,4} in RB set index 2, and the offset of index is also 1 IRB index, so the distribution of IRB indexes in RB set index 3 is {4,0}, because the offset of IRB index supporting the loop has 5 IRB indexes {0,1,2,3,4}, so when IRB index is 4, after being offset by 1 PRB index, IRB index is 0.

For another example, for the reserved second resource, RB set {1,3,4} is allocated, in RB set index 1, IRB index is {3,4}, in RB set index 3, IRB index {3,4} is relative to RB set index 1, IRB index has 1 offset, and the offset is 1 IRB index, so the distribution of IRB indexes in RB set index 3 is {4,0 }; in RB set index 4, the IRB index has 1 offset relative to the IRB index {4,0} of RB set index 3, and the offset is 1 IRB index, so the distribution of the IRB index in RB set index 4 is {0,1 }.

In another implementation, the first stage SCI also wrapsThe second offset domain is used for indicating the offset of each resource block set in the reserved 1 st resource relative to the IRB index in the corresponding resource block set in the resource transmitted for the first time or indicating the offset of each resource block set in the reserved 2 nd resource relative to the IRB index in the corresponding resource block set in the resource transmitted for the first time; wherein the number of bits of the second offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband.

For example, a second offset field (IRB index offset) is introduced in SCI 1-a for the offset of each set of resource blocks in the reserved 1 st resource with respect to the IRB index in the corresponding set of resource blocks in the first transmitted resource, or indicating the offset of each set of resource blocks in the reserved 2 nd resource with respect to the IRB index in the corresponding set of resource blocks in the first transmitted resource. It is assumed that when the offset value of the second offset field is 0, it indicates that the distribution rule of each resource block set in the reserved 1 st resource with respect to the IRB index in the corresponding resource block set in the first transmitted resource is the same, or indicates that the distribution rule of each resource block set in the reserved 2 nd resource with respect to the IRB index in the corresponding resource block set in the first transmitted resource is the same.

As an example, as shown in fig. 13, assuming that RB sets of the initial transmission are distributed as {2,3,4}, and the distribution of IRB indexes in the 3 RB sets is all {2,3,4}, then RB sets of the reserved first resource are distributed as {0,3,4}, where IRB index offset in RB set index 0 of the reserved first resource relative to IRB index of RB set index 2 of the initial transmission is 1, and then distribution of IRB indexes in RB set index 0 of the reserved first resource is {0,3,4 }; the IRB index offset of the RB set index 3 of the reserved first-time resource relative to the IRB index offset of the RB set index 3 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 3 of the reserved first-time resource is {0,3,4 }; the IRB index offset of the RB set index 4 of the reserved first-time resource relative to the IRB index of the RB set index 4 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 4 of the reserved first-time resource is {0,3,4 }; similarly, for the reserved resource RB set {0,1,2} of the second time, the IRB index offset of the reserved resource RB set index 0 of the second time relative to the IRB index offset of the RB set index 2 of the first transmission is 1, and then the distribution of the IRB indexes in the reserved resource RB set index 0 of the second time is {0,3,4 }; the IRB index offset of the RB set index 1 of the reserved second reserved resource relative to the IRB index offset of the RB set index 3 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 1 of the reserved second reserved resource is {0,3,4 }; and the IRB index offset of the RB set index 2 of the reserved second reserved resource relative to the IRB index offset of the RB set index 4 of the initial transmission is 1, and the distribution of the IRB indexes in the RB set index 2 of the reserved second reserved resource is {0,3,4 }.

By implementing the embodiment of the application, the OCB requirement can be met on the unauthorized frequency band through the resource allocation indication of the frequency domain resource allocation granularity based on the comb-tooth resource block IRB, and if each transmission can occupy 80% of the bandwidth of an LBT sub-band, the resource utilization rate can be better ensured; in addition, the application supports that the SCI is located at the lowest (i.e. initial) or non-lowest (i.e. non-initial) IRB index in the allocated IRB index, and the SCI relative to R16 can be designed only on the lowest (i.e. initial) sub-channel, so that the potentially diversified application scenarios and requirements in the future can be met.

It can be understood that the foregoing embodiments describe implementation manners of the resource indication method according to the embodiments of the present application from the first terminal device side. The embodiment of the present application further provides a resource determining method, and an implementation manner of the resource determining method will be described below from the second terminal device side. Referring to fig. 14, fig. 14 is a flowchart of a resource determining method according to an embodiment of the present application. It should be noted that the resource determination method in the embodiment of the present application is applied to the terminal direct connection communication unlicensed frequency band, and may be executed by the second terminal device. As shown in fig. 14, the resource determination method may include, but is not limited to, the following steps.

In step 1401, receiving first-stage direct link control information SCI sent by a first terminal device based on a frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device.

In an embodiment of the present application, the frequency domain resource allocation granularity may be a subchannel or a comb resource block IRB. The first terminal device may determine a frequency domain resource allocation granularity. The frequency domain resource allocation granularity may be a subchannel or may also be a comb resource block IRB. For example, the first terminal device may reuse the original subchannel (subchannel) -based frequency-domain resource indication manner in SCI 1-a (i.e., the first-stage SCI) to increase the design of the mapping from the subchannel to the IRB. That is to say, the first terminal device may reuse the original frequency domain resource indication manner based on the sub-channel in the first stage SCI, where the mapping relationship between the sub-channel and the IRB needs to be determined, that is, the resource indication of the frequency domain resource allocation granularity based on the sub-channel may be implemented. The IRB is a distributed PRB set with equal intervals, and the sub-channel is a continuous PRB set.

In an embodiment of the present application, the first terminal device may send the first-stage SCI to the second terminal device based on the determined frequency-domain resource allocation granularity, so that the second terminal device may receive the first-stage SCI sent by the first terminal device based on the frequency-domain resource allocation granularity. For example, the first terminal device may divide the bandwidth part BWP according to the size of the BWP and the granularity of frequency domain resource allocation, to obtain N units, and send the first-stage SCI to the second terminal device, so that the second terminal device may receive the first-stage SCI sent by the first terminal device, where the first-stage SCI may include a frequency domain resource allocation field, and the frequency domain resource allocation field is used to indicate a unit allocated to the first terminal device among the N units, that is, indicate a frequency domain resource occupied by the first terminal device.

In step 1402, the frequency domain resource occupied by the first terminal device is determined according to the first stage SCI and the frequency domain resource allocation granularity.

That is to say, when receiving the first-stage SCI sent by the first terminal device, the second terminal device may determine the frequency domain resource occupied by the first terminal device from the frequency domain resource allocation domain in the first-stage SCI.

In step 1403, frequency domain resources available to the second terminal device are determined according to the frequency domain resources occupied by the first terminal device.

That is, after determining the frequency domain resource occupied by the first terminal device, the second terminal device may determine the frequency domain resource available to the second terminal device itself.

It is noted that, in the first stage SCI, the original frequency domain resource indication method based on the sub-channel may be reused, where a mapping relationship between the sub-channel and the IRB needs to be determined, that is, the resource indication of the frequency domain resource allocation granularity based on the sub-channel may be implemented. Optionally, in some embodiments of the present application, assuming that the frequency domain resource allocation granularity is a subchannel, the second terminal device may determine a mapping relationship between the subchannel and the comb resource block IRB, and receive the first stage SCI sent by the first terminal device based on the subchannel for the frequency domain resource allocation granularity and the mapping relationship.

That is, the present application reuses the original frequency domain resource indication manner based on sub-channels in the first stage SCI, where the mapping relationship between sub-channels to IRBs needs to be determined. In one implementation, the mapping relationship between the sub-channels and the IRB may be determined by: determining a mapping relationship between a sub-channel and an IRB as that one sub-channel corresponds to one IRB index, wherein the number of sub-channels and IRB indexes included in a given listen before talk, LBT, sub-band is the same.

In the embodiment of the present application, after determining the mapping relationship between the sub-channel and the IRB, the first terminal device may send the first-stage SCI to the second terminal device based on the mapping relationship and the granularity of resource allocation in the frequency domain using the sub-channel. The second terminal device may determine a mapping relationship between the sub-channel and the IRB, and receive a first-stage SCI sent by the first terminal device based on the sub-channel and the frequency-domain resource allocation granularity, where the first-stage SCI may include a frequency-domain resource allocation field, and the frequency-domain resource allocation field is used to indicate the frequency-domain resources occupied by the first terminal device. That is, after determining the mapping relationship between the IRBs, the first terminal device and the second terminal device may continue to use the original subchannel-based frequency-domain resource indication manner in the first-stage SCI.

It is noted that the present application may perform resource indication for the granularity of frequency domain resource allocation based on IRB. That is to say, the frequency domain resource allocation information field in the SCI of the first stage may be redesigned, that is, the resource indication may be performed for the frequency domain resource allocation granularity based on the IRB. That is to say, in the embodiment of the present application, the frequency domain resource allocation field in SCI 1-a (i.e., the first-stage SCI) does not perform resource indication for the frequency domain resource allocation granularity based on the sub-channel, but performs resource indication for the frequency domain resource allocation granularity based on the IRB.

In one implementation, the first terminal device may divide the bandwidth part BWP according to the size of the BWP and the granularity of frequency domain resource allocation with IRB, to obtain N units, and send the first stage SCI to the second terminal device. The second terminal device may receive a first-stage SCI sent by the first terminal device for the frequency domain resource allocation granularity based on the IRB, where a frequency domain resource allocation domain in the first-stage SCI is used to indicate a size and/or a position of a frequency domain resource of the first terminal device for the primary direct connection communication Sidelink transmission, and reserve a starting position and a size of the frequency domain resource of the direct connection communication Sidelink resource.

It can be understood that, because the SCI is located at the lowest IRB index among the allocated IRB indexes, the terminal device can know the location of the starting IRB index of the allocated frequency domain resource by blindly detecting the SCI, and therefore, the location of the initially transmitted starting IRB index does not need to be indicated in the frequency domain resource allocation field of SCI 1-a. For example, as shown in fig. 9, the 3 IRB indices {1,2,3} are allocated to the PSCCH, where the PSCCH carries the control information SCI 1-a at the lowest (i.e., starting) IRB index, i.e., IRB index 1.

indexes

In one implementation, the number of bits X of the first part is [ log ]₂(L)]L is the number of IRB indices included in one LBT subband, L being a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation. As an example, the present application may reuse the design method of R16, support SCI at the lowest (i.e., starting) IRB index among the allocated IRB indexes, and frequency-domain resource allocation supports consecutive IRB index allocation, and may determine that the number of bits X of the first part may be [ log ] or₂(L)]。

It can be understood that, because the SCI is located at the lowest IRB index among the allocated IRB indexes, the terminal device can know the location of the starting IRB index of the allocated frequency domain resource by blindly detecting the SCI, and therefore, the location of the initially transmitted starting IRB index does not need to be indicated in the frequency domain resource allocation field of SCI 1-a. For example, it is assumed that the design method of R16 is reused in the present application, SCI is supported to be located at the lowest (i.e. starting) IRB index among the allocated IRB indexes, and frequency domain resource allocation only supports continuous IRB index allocation, and the position of the starting IRB index occupied by initial transmission is not indicated in SCI 1-a, and only the number of the continuously occupied IRB indexes is indicated; in this case, the number X of bits in the first part of SCI 1-A is [ log ]₂(L)]. Wherein "[ 2 ]]"may mean rounding up. For example, if the number L of IRB indexes included in one LBT sub-band is 5, if the initial IRB index is 0, there are 5 possibilities of IRB lengths of 1,2,3,4,5, etc., and if the initial IRB index is 3, there are two possibilities of 1 (e.g., only IRB index 3 is occupied) and 2 (e.g.,

IRB index

3,4 is occupied), so there are at most L possibilities.

In one implementation, the number of bits X of the first part is

As an example, the present application does not reuse the design method of R16, and the SCI may be located on the non-lowest (i.e. non-initial) IRB index in the allocated IRB index, which is the location where the initial IRB index of the initial transmission needs to be indicated (since the SCI is not located on the initial IRB index, the location of the initial IRB index cannot be obtained by blindly detecting the SCI, which is needed to indicate the initial IRB index). For example, in response to the design method of the present application not reusing R16, SCI may be located on the IRB index that is not the lowest (i.e., not the initial) among the allocated IRB indexes, and the frequency-domain resource allocation supports continuous IRB index allocation, then the number of bits X of the first part may be determined

In one implementation, the number of bits Y of the second part may be

K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports resource allocation of continuous resource block sets and supports SCI to reserve 1 time of resources.

In one implementation, the number of bits Y of the second part is

That is, the present application follows the design concept of R16 NR-U, and only supports resource allocation of continuous RB sets, and supports SCI to reserve resources for 2 timesDetermining the number of bits Y of the second part as

sequence numbers

1,2,3, and 4 is occupied, it indicates that the

sequence numbers

That is, without using the design concept of R16 NR-U, the present application may support resource allocation of discrete RB sets, and support SCI to reserve resources 2 times, and then determine that the bit number Y of the second portion is 3K-1, which is used to indicate the RB set occupied by the transmission (but only indicates whether an RB set higher than the occupied RB set is occupied, so it is K-1 bit), and indicate the starting position of the reserved 1 st resource and the number K bits of the occupied RB sets, and indicate the starting position of the reserved 2 nd resource and the number K bits of the occupied RB sets.

It should be noted that, in the embodiment of the present application, a new information field, alternatively referred to as IRB index offset field (IRB index offset), is introduced into SCI 1-a. In one implementation, the first stage SCI may further include a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 1 st resource, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 2 nd resource; wherein the number of bits of the first offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband. It is also noted that the frequency domain resource allocation supports cyclic IRB indexingAnd (4) offsetting.

For example, a first offset field (IRB index offset) is introduced in SCI 1-a, which is used to indicate an offset of an IRB index in an adjacent resource block set in the resource transmitted for the first time, or indicate an offset of an IRB index in an adjacent resource block set in the reserved resource 1 for the first time, or indicate an offset of an IRB index in an adjacent resource block set in the reserved resource 2 for the second time. Assume that when the offset value of the first offset field is 0, the distribution rule of the IRB index in the RB set occupied by the resource for the initial transmission is the same, or the distribution rule of the IRB index in the RB set occupied by the reserved 1-time resource is the same, or the distribution rule of the IRB index in the RB set occupied by the reserved 2-th resource is the same.

In another implementation, the first-stage SCI further includes a second offset field, where the second offset field is used to indicate an offset of each resource block set in the reserved 1 st resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource, or indicate an offset of each resource block set in the reserved 2 nd resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource; wherein the number of bits of the second offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband.

For example, a second offset field (IRB index offset) is introduced in SCI 1-a for the offset of each set of resource blocks in the reserved 1 st resource with respect to the IRB index in the corresponding set of resource blocks in the first transmitted resource, or indicating the offset of each set of resource blocks in the reserved 2 nd resource with respect to the IRB index in the corresponding set of resource blocks in the first transmitted resource. Assuming that when the offset value of the second offset field is 0, it indicates that the distribution rule of each resource block set in the reserved 1 st resource with respect to the IRB index in the corresponding resource block set in the resource for the initial transmission is the same, or indicates that the distribution rule of each resource block set in the reserved 2 nd resource with respect to the IRB index in the corresponding resource block set in the resource for the initial transmission is the same.

As an example, as shown in fig. 13, assuming that RB sets of the initial transmission are distributed as {2,3,4}, and the distribution of IRB indexes in the 3 RB sets is all {2,3,4}, then RB sets of the reserved first resource are distributed as {0,3,4}, where IRB index offset in RB set index 0 of the reserved first resource relative to IRB index of RB set index 2 of the initial transmission is 1, and then distribution of IRB indexes in RB set index 0 of the reserved first resource is {0,3,4 }; the IRB index offset of the RB set index 3 of the reserved first-time resource relative to the IRB index offset of the RB set index 3 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 3 of the reserved first-time resource is {0,3,4 }; the IRB index offset of the RB set index 4 of the reserved first-time resource relative to the IRB index of the RB set index 4 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 4 of the reserved first-time resource is {0,3,4 }; similarly, for the reserved resource RB set {0,1,2} for the second time, the IRB index offset in the RB set index 0 of the reserved resource reserved for the second time relative to the IRB index offset in the RB set index 2 of the first transmission is 1, and the distribution of the IRB indexes in the RB set index 0 of the reserved resource reserved for the second time is {0,3,4 }; the IRB index offset of the RB set index 1 of the reserved second reserved resource relative to the IRB index offset of the RB set index 3 transmitted for the first time is 1, and the distribution of the IRB indexes in the RB set index 1 of the reserved second reserved resource is {0,3,4 }; and the IRB index offset of the RB set index 2 of the reserved second reserved resource relative to the IRB index offset of the RB set index 4 of the initial transmission is 1, and the distribution of the IRB indexes in the RB set index 2 of the reserved second reserved resource is {0,3,4 }.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of the first terminal device and the second terminal device, respectively. In order to implement the functions in the method provided by the embodiment of the present application, the first terminal device and the second terminal device may include a hardware structure and a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Some of the above functions may be implemented by a hardware structure, a software module, or a hardware structure plus a software module.

Fig. 15 is a schematic structural diagram of a communication device 150 according to an embodiment of the present disclosure. The communication device 150 shown in fig. 15 may include a transceiver module 1501 and a processing module 1502. The transceiver module 1501 may include a transmitting module and/or a receiving module, where the transmitting module is configured to implement a transmitting function, the receiving module is configured to implement a receiving function, and the transceiver module 1501 may implement a transmitting function and/or a receiving function.

The communication device 150 may be the first terminal device, may be a device in the first terminal device, or may be a device that can be used in cooperation with the first terminal device. Alternatively, the communication device 150 may be the second terminal device, may be a device in the second terminal device, or may be a device that can be used in cooperation with the second terminal device.

The communication apparatus 150 is a first terminal device: in an embodiment of the present application, the transceiver module 1501 is configured to send first-stage direct link control information SCI to the second terminal device based on the frequency domain resource allocation granularity; the first stage SCI includes a frequency domain resource allocation field, where the frequency domain resource allocation field is used to indicate a frequency domain resource occupied by the first terminal device.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the processing module 1502 is configured to determine a mapping relationship between a subchannel and a comb resource block IRB; the transceiver module 1501 is configured to send the first-stage SCI to the second terminal device based on the subchannel and the granularity of frequency-domain resource allocation and the mapping relationship.

In one possible implementation, the processing module 1502 is configured to: determining a mapping relationship between a sub-channel and an IRB as that one sub-channel corresponds to one IRB index, wherein the number of sub-channels and IRB indexes included in a given listen before talk, LBT, sub-band is the same.

In one possible implementation, the processing module 1502 is configured to: determining the mapping relation between the sub-channels and the IRBs, namely that each physical resource block PRB in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; where a given LBT subband includes M subchannels and N IRB indices, M, N are each positive integers.

In one implementation, the frequency domain resource allocation granularity is IRB; the transceiver module 1501 is configured to: sending a first stage SCI to a second terminal device based on IRB for frequency domain resource allocation granularity; the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

In one possible implementation, the frequency domain resource allocation field includes a first portion, where the first portion is used to indicate the number and/or position of IRB indexes occupied by the Sidelink transmission within one LBT subband, and the first portion includes X bits, where X is a positive integer.

In one possible implementation, X is L-1, L is the number of IRB indices included within one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is positioned on the lowest IRB index in the distributed IRB indexes, and the frequency domain resource distribution supports the distribution of discrete IRB indexes; or, X is [ log ]₂(L)]L is the number of IRB indices included in one LBT subband, L being a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

In one possible implementation, X is L, L is the number of IRB indices included in one LBT subband, and L is a positive integer; wherein, the direct link control information SCI is positioned on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports the allocation of discrete IRB indexes; or, X is

In one possible implementation, Y is

K is the number of resource block sets contained in the BWP of the direct connection communication bandwidth part, and is a positive integer; the frequency domain resource allocation supports resource allocation of continuous resource block sets and supports SCI to reserve 1 time of resources; or Y is

In one possible implementation, Y is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports the resource allocation of a discrete resource block set and supports SCI to reserve 1 time of resources; or, Y is 3K-1; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein the frequency domain resource allocation supports resource allocation of a discrete set of resource blocks and supports SCI reservation of resources 2 times.

In a possible implementation manner, the first stage SCI further includes a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 1 st resourceAn amount, or an offset indicating an IRB index in an adjacent set of resource blocks in a reserved secondary resource 2; wherein the first offset field has a bit number of [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband.

In a possible implementation manner, the first-stage SCI further includes a second offset field, where the second offset field is used to indicate an offset of each resource block set in the reserved 1 st resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource, or indicate an offset of each resource block set in the reserved 2 nd resource with respect to an IRB index in a corresponding resource block set in the first-transmitted resource; wherein the number of bits of the second offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband.

In one possible implementation, the frequency domain resource allocation supports an offset of the IRB index of the loop.

The communication means 150 is a second terminal device: in an embodiment of the present application, the transceiver module 1501 is configured to receive first-stage direct link control information SCI sent by a first terminal device based on a frequency domain resource allocation granularity; the first stage SCI comprises a frequency domain resource allocation domain, wherein the frequency domain resource allocation domain is used for indicating frequency domain resources occupied by the first terminal equipment; the processing module 1502 is configured to determine, according to the first-stage SCI and the frequency domain resource allocation granularity, a frequency domain resource occupied by the first terminal device, and determine, according to the frequency domain resource occupied by the first terminal device, a frequency domain resource available to the second terminal device.

In one implementation, the frequency domain resource allocation granularity is a subchannel; the processing module 1502 is further configured to: determining a mapping relation between a subchannel and a comb-tooth resource block IRB; the transceiver module 1501 is configured to receive a first stage SCI sent by the first terminal device based on the sub-channel for the granularity of frequency domain resource allocation and the mapping relationship.

In one possible implementation, the processing module 1502 is configured to: determining a mapping relationship between a sub-channel and an IRB as that one sub-channel corresponds to one IRB index, wherein the number of the sub-channels and the IRB indexes included in a given Listen Before Talk (LBT) sub-band is the same.

In one possible implementation, the processing module 1502 is configured to: determining the mapping relation between the sub-channels and the IRBs, namely that each physical resource block PRB in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; a given LBT sub-band includes M sub-channels and N IRBs, where M and N are positive integers, respectively.

In one implementation, the frequency domain resource allocation granularity is IRB; the transceiver module 1501 is configured to: receiving a first stage SCI sent by a first terminal device for frequency domain resource allocation granularity based on an IRB; the frequency domain resource allocation domain in the SCI at the first stage is used to indicate the size and/or position of the frequency domain resource for the first terminal device for the primary direct connection communication Sidelink transmission, and reserve the starting position and size of the frequency domain resource of the direct connection communication Sidelink resource.

L is IR included within one LBT sub-bandB, the number of indexes, and L is a positive integer; wherein, the direct link control information SCI is located on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

In one possible implementation, Y is

K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; the frequency domain resource allocation supports the resource allocation of a continuous resource block set and supports the reservation of 1-time resource by SCI; or Y is

In a possible implementation manner, the first stage SCI further includes a first offset field, where the first offset field is used to indicate an offset of an IRB index in an adjacent resource block set in a resource for initial transmission, or indicate an offset of an IRB index in an adjacent resource block set in a reserved 1 st resource, or indicate a bias of an IRB index in an adjacent resource block set in a reserved 2 nd resourceMoving amount; wherein the number of bits of the first offset field is [ log ]₂(L)](ii) a Where L is the number of IRB indices included within one LBT subband.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Referring to fig. 16, fig. 16 is a schematic structural diagram of another communication device 160 according to an embodiment of the present disclosure. Communication apparatus 160 may be a first terminal device, a second terminal device, a chip, a system-on-chip, a processor, or the like that supports the first terminal device to implement the method, or a chip, a system-on-chip, a processor, or the like that supports the second terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The communication device 160 may include one or more processors 1601. The processor 1601 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal device chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

Optionally, the communication device 160 may further include one or more memories 1602, on which a computer program 1604 may be stored, and the processor 1601 executes the computer program 1604 to enable the communication device 160 to perform the method described in the above method embodiments. Optionally, the memory 1602 may further store data therein. The communication device 160 and the memory 1602 may be separate or integrated.

Optionally, the communication device 160 may further include a transceiver 1605, an antenna 1606. The transceiver 1605 may be referred to as a transceiving unit, a transceiver, a transceiving circuit, or the like, for implementing a transceiving function. The transceiver 1605 may include a receiver and a transmitter, and the receiver 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 transmission circuit, etc. for implementing the transmission function.

Optionally, one or more interface circuits 1607 may also be included in communications device 160. The interface circuit 1607 is used to receive code instructions and transmit them to the processor 1601. The processor 1601 executes the code instructions to cause the communication device 160 to perform the methods described in the above method embodiments.

The communication device 160 is a first terminal apparatus: the transceiver 1605 is configured to perform step 201 in fig. 2; execute 602 in fig. 6; step 801 in fig. 8 is performed. Processor 1601 is configured to perform step 601 in fig. 6.

The communication device 160 is a second terminal apparatus: the transceiver 1605 is configured to perform step 1401 in fig. 14. Processor 1601 is configured to perform

steps

1402 and 1403 in fig. 14.

In one implementation, the processor 1601 may include a transceiver for performing receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 1601 may store a computer program 1603, which is executed on the processor 1601 and may cause the communication device 160 to perform the method described in the above method embodiment. The computer program 1603 may be solidified in the processor 1601, in which case the processor 1601 may be implemented by hardware.

In one implementation, the communication device 160 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The communication apparatus in the above description of the embodiment may be the first terminal device or the second terminal device, 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. 16. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

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

(2) a set of one or more ICs, which optionally may also include storage means for storing data, computer programs;

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

(4) a module that may be embedded within other devices;

(5) receivers, terminal devices, smart terminal devices, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) others, and so forth.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in 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. 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 embodiments of the present application.

An embodiment of the present application further provides a communication system, where the system includes the communication apparatus serving as the first terminal device and the communication apparatus serving as the second terminal device in the foregoing fig. 15 embodiment, or the system includes the communication apparatus serving as the first terminal device and the communication apparatus serving as the second terminal device in the foregoing fig. 16 embodiment.

The present application further provides a readable storage medium having stored thereon instructions which, when executed by a computer, implement the functionality of any of the above-described method embodiments.

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

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes 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 Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence.

At least one of the present applications 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 in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in a sequential order or a size order.

The correspondence shown in the tables in the present application may be configured or predefined. The values of the information in each table are only examples, and may be configured to other values, which is not limited in the present application. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present application, the correspondence shown in some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Predefinition 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 implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

Claims

1. A resource indication method is applied to an unlicensed frequency band of terminal direct connection communication, and is characterized in that the method is executed by a first terminal device, and the method comprises the following steps:

2. The method of claim 1, wherein the frequency domain resource allocation granularity is a subchannel; the sending the first-stage direct link control information SCI to the second terminal device based on the frequency domain resource allocation granularity includes:

determining a mapping relation between the sub-channel and a comb-shaped resource block IRB;

3. The method of claim 2, wherein the determining the mapping relationship between the sub-channels and comb resource blocks (IRBs) comprises:

4. The method of claim 2, wherein the determining the mapping relationship between the sub-channels and comb resource blocks (IRBs) comprises:

determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein a given LBT subband includes M subchannels and N IRB indices, and wherein M, N are positive integers respectively.

5. The method of claim 1, wherein the frequency domain resource allocation granularity is IRB; the sending the first-stage direct link control information SCI to the second terminal device based on the frequency domain resource allocation granularity includes:

6. The method of claim 5, wherein the frequency-domain resource allocation field comprises a first portion indicating a number and/or location of IRB indices that a Sidelink transmission occupies within one LBT subband, wherein the first portion comprises X bits, and wherein X is a positive integer.

7. The method of claim 6, wherein X is L-1, wherein L is the number of IRB indices included in one LBT subband, and wherein L is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation;

alternatively, X is [ log ]₂(L)]The L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index among the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

8. The method of claim 6, wherein X is L, wherein L is the number of IRB indices included in one LBT subband, and wherein L is a positive integer; wherein, the direct link control information SCI is positioned on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports the allocation of discrete IRB indexes;

or, X is

The L is an IRB index included in one LBT sub-bandL is a positive integer; wherein, the direct link control information SCI is located on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

9. The method according to any of claims 6 to 8, wherein the frequency domain resource allocation field further comprises a second part indicating the number and/or location of LBT subbands occupied by Sidelink transmissions, the second part comprising Y bits, Y being a positive integer.

10. The method of claim 9, wherein Y is

The K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and is a positive integer; the frequency domain resource allocation supports resource allocation of a continuous resource block set and supports SCI to reserve 1 time of resources;

or, Y is

11. The method of claim 9, wherein Y is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein, the frequency domain resource allocation supports the resource allocation of a discrete resource block set and supports SCI to reserve 1 time of resources;

or, Y is 3K-1; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein the frequency domain resource allocation supports resource allocation of a discrete set of resource blocks and supports SCI reservation of resources 2 times.

12. The method according to any of claims 9 to 11, wherein the first stage SCI further comprises a first offset field, and the first offset field is used for indicating an offset of an IRB index in an adjacent resource block set in a resource transmitted for the first time, or indicating an offset of an IRB index in an adjacent resource block set in a reserved 1 st time resource, or indicating an offset of an IRB index in an adjacent resource block set in a reserved 2 nd time resource;

wherein the first offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

13. The method of any of claims 9 to 11, wherein the first stage SCI further comprises a second offset field indicating an offset of each set of resource blocks in the reserved 1 st resource with respect to IRB indices in a corresponding set of resource blocks in the first transmitted resource or indicating an offset of each set of resource blocks in the reserved 2 nd resource with respect to IRB indices in a corresponding set of resource blocks in the first transmitted resource;

wherein the second offset field has a bit number of [ log ]₂(L)](ii) a Wherein the L is the number of IRB indexes included in one LBT sub-band.

14. The method of claim 12 or 13, wherein the frequency domain resource allocation supports an offset of an IRB index of a cycle.

15. A resource determination method is applied to an unlicensed frequency band of terminal direct connection communication, and is characterized in that the method is executed by a second terminal device, and the method comprises the following steps:

16. The method of claim 15, wherein the frequency domain resource allocation granularity is a subchannel; the receiving the first-stage direct link control information SCI sent by the first terminal device based on the frequency domain resource allocation granularity includes:

and receiving the first-stage SCI sent by the first terminal equipment based on the sub-channel for the frequency domain resource allocation granularity and the mapping relation.

17. The method of claim 16, wherein the determining the mapping relationship between the sub-channels and comb resource blocks (IRBs) comprises:

18. The method of claim 16, wherein the determining the mapping relationship between the sub-channels and comb resource blocks (IRBs) comprises:

determining the mapping relation between the sub-channel and the IRB, wherein each Physical Resource Block (PRB) in one sub-channel is mapped to a specific PRB of a plurality of IRB indexes; wherein a given LBT subband includes M subchannels and N IRBs, and M, N are positive integers respectively.

19. The method of claim 15, wherein the frequency domain resource allocation granularity is IRB; the receiving the first-stage direct link control information SCI sent by the first terminal device based on the frequency domain resource allocation granularity includes:

receiving a first stage SCI sent by a first terminal device for frequency domain resource allocation granularity based on the IRB;

20. The method of claim 19, wherein the frequency domain resource allocation field comprises a first portion indicating a number and/or location of IRB indices that a Sidelink transmission occupies within one LBT subband, wherein the first portion comprises X bits, and wherein X is a positive integer.

21. The method of claim 19, wherein X is L-1, wherein L is a number of IRB indices included in one LBT subband, and wherein L is a positive integer; wherein, the direct link control information SCI is located on the lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports discrete IRB index allocation;

alternatively, X is [ log ]₂(L)]The L is the number of IRB indexes included in one LBT sub-band, and is a positive integer; wherein the direct link control information SCI is located on the lowest IRB index among the allocated IRB indexes, and the frequency domain resource allocation supports continuous IRB index allocation.

22. The method of claim 19, wherein X is L, wherein L is a number of IRB indices included in one LBT subband, and wherein L is a positive integer; wherein, the direct link control information SCI is positioned on the non-lowest IRB index in the allocated IRB indexes, and the frequency domain resource allocation supports the allocation of discrete IRB indexes;

or, X is

23. The method of any of claims 19 to 22, wherein the frequency-domain resource allocation field further comprises a second portion indicating a number and/or location of LBT subbands occupied by a Sidelink transmission, wherein the second portion comprises Y bits, and wherein Y is a positive integer.

24. The method of claim 23, wherein Y is

or, Y is

25. The method of claim 23, wherein Y is K-1+ K; wherein, K is the number of resource block sets contained in the direct connection communication bandwidth part BWP, and K is a positive integer; wherein, the frequency domain resource allocation supports the resource allocation of a discrete resource block set and supports SCI to reserve 1 time of resources;

26. The method of any of claims 23 to 25, wherein the first stage SCI further comprises a first offset field indicating an offset of an IRB index in an adjacent set of resource blocks in a resource for initial transmission, or indicating an offset of an IRB index in an adjacent set of resource blocks in a reserved 1 st resource, or indicating an offset of an IRB index in an adjacent set of resource blocks in a reserved 2 nd resource;

wherein the first offset field has a bit number of [ log ]₂(L)](ii) a Wherein, the L is the number of IRB indexes included in one LBT sub-band.

27. The method of any of claims 23 to 25, wherein the first stage SCI further comprises a second offset field indicating an offset of each set of resource blocks in the reserved 1 st resource from the IRB index in the corresponding set of resource blocks in the first transmitted resource or indicating an offset of each set of resource blocks in the reserved 2 nd resource from the IRB index in the corresponding set of resource blocks in the first transmitted resource;

28. The method of claim 26 or 27, wherein the frequency domain resource allocation supports an offset of an IRB index of a cycle.

29. A communication device is applied to a terminal direct connection communication unlicensed frequency band, and is characterized by comprising:

30. A communication device is applied to a terminal direct connection communication unlicensed frequency band, and is characterized by comprising:

31. A communications apparatus, comprising a processor and a memory, the memory having a computer program stored therein, the processor executing the computer program stored in the memory to cause the apparatus to perform the method of any of claims 1 to 14.

32. A communications apparatus, comprising 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 apparatus to perform the method of any of claims 15 to 28.

33. A computer readable storage medium storing instructions that, when executed, cause a method as recited in any of claims 1-14 to be implemented.

34. A computer readable storage medium storing instructions that, when executed, cause a method as claimed in any of claims 15 to 28 to be implemented.