CN117460050A

CN117460050A - Resource allocation method and equipment

Info

Publication number: CN117460050A
Application number: CN202210963173.8A
Authority: CN
Inventors: 刘云; 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-07-13
Filing date: 2022-08-11
Publication date: 2024-01-26

Abstract

The embodiment of the application provides a resource configuration method and equipment. By the method, the first terminal equipment can reserve N resources according to Listen Before Talk (LBT) duration corresponding to N transmission requirements. Because the LBT duration is considered, the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached can be reduced, so that the probability that the first terminal equipment can use the resource corresponding to the transmission requirement to transmit data can be improved, and the communication efficiency of the terminal equipment is ensured.

Description

Resource allocation method and equipment

Cross Reference to Related Applications

The present application claims priority from the chinese patent office, application number 202210824434.8, application name "a side-uplink transmission method" filed on day 13 of 2022, 07, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for resource allocation.

Background

As communication technology evolves and evolves, it is known from the third generation partnership project (3 ^rd Generation Partnership Project,3 GPP) release 12, fourth generation (4) ^th A generation, 4G) communication system (i.e., a long term evolution (Long Term Evolution, LTE) system) may support device-to-device communication. This manner of communication may be referred to as Device-to-Device (D2D) communication, also known as Sidelink (SL) communication.

For example, 3GPP introduced support for vehicle-to-vehicle (vehicle to vehicle, V2V) and vehicle-to-everything (vehicle to everything, V2X) services in the LTE system during Release 14 and 15 in order to extend the 3GPP platform to the automotive industry. During Release 16, a related design of New Radio (NR) V2X was studied.

In the sidelink system, the terminal device may reserve a plurality of discontinuous resources for subsequent transmission in one transmission, and transmit on the resources. For example, in the case where there is a data transmission demand, the terminal device reserves a plurality of discontinuous resources for retransmission of data to be transmitted. Wherein, a certain time interval is needed between each resource, and the minimum value of the time interval between any two resources is called minimum time interval (minimum gap). The terminal device may receive, during the time interval, a reply response corresponding to the prior transmission and a processing delay for the reply response. Therefore, the minimum time interval should be greater than or equal to the delay of transmitting the corresponding acknowledgement response and the processing delay of the acknowledgement response by the terminal device.

For example, after the terminal device uses the first resource to transmit data, if the terminal device receives a successful response within a time interval between the first resource and the adjacent second resource, the terminal device may terminate the retransmission of the data using the second resource after the first resource, or use the second resource to transmit other data, so as to avoid wasting resources.

However, the above-mentioned resource allocation scheme does not consider the channel condition, and thus, data transmission through the above-mentioned resource allocation scheme may affect the communication efficiency of the terminal device.

Disclosure of Invention

The application provides a resource allocation method and equipment, which are used for guaranteeing the communication efficiency of terminal equipment.

In a first aspect, an embodiment of the present application provides a resource allocation method, which may be applied to a first terminal device in a SL-U system. The method comprises the following steps:

acquiring Listen Before Talk (LBT) time lengths corresponding to N transmission requirements; wherein N is an integer greater than or equal to 1; determining N resources according to LBT duration corresponding to the N transmission requirements; the N resources are in one-to-one correspondence with the N transmission requirements, and when N is an integer greater than 1, a time interval between any two resources is greater than or equal to a minimum time interval.

By the method, the first terminal equipment can reserve resources according to LBT duration corresponding to the N transmission requirements. Because the LBT duration is considered, the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached can be reduced, so that the probability that the first terminal equipment can use the resource corresponding to the transmission requirement to transmit data can be improved, and the communication efficiency of the terminal equipment is ensured.

In one possible design, the first terminal device may determine N resources according to LBT durations corresponding to the N transmission requirements by:

determining an nth starting time according to the LBT duration corresponding to the nth transmission requirement; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N; the nth start time is the start time of the resource selection range of the nth transmission requirement; and determining the resource corresponding to the nth transmission requirement according to the nth starting time.

Through the design, the first terminal device can determine the starting time of the resource selection range of each transmission requirement according to the LBT duration corresponding to each transmission requirement, and further can determine the resource corresponding to each transmission requirement according to the starting time of the resource selection range of each transmission requirement. Of course, the resource corresponding to any transmission requirement is not earlier than the start time of the resource selection range of the transmission requirement. Since the starting time of the resource selection range of each transmission requirement is determined according to the LBT duration corresponding to the transmission requirement, the design can reduce the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached.

In one possible design, the first terminal device includes a physical PHY layer and a medium access control MAC layer.

In one possible design, the PHY layer may determine the nth start time according to an LBT duration corresponding to the nth transmission requirement.

In one possible design, the first terminal device may determine the resource corresponding to the nth transmission requirement by:

mode one: the PHY layer sends the nth start time to the MAC layer; the MAC layer determines the resource selection range of the nth transmission requirement according to the nth starting time; the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement;

mode two: the PHY layer determines the resource selection range of the nth transmission requirement according to the nth starting time; the PHY layer sends the resource selection range of the nth transmission requirement to the MAC layer; the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement;

mode three: the PHY layer determines a starting time unit of a resource selection range of the nth transmission requirement according to the nth starting time; the PHY layer sends a starting time unit and a candidate resource set of the resource selection range of the nth transmission requirement to the MAC layer; the MAC layer selects a range starting time unit according to the resources of the nth transmission requirement, and determines resources corresponding to the nth transmission requirement in the resource candidate set;

Mode four: the PHY layer determines a candidate resource set of the nth transmission requirement according to the nth starting time; the PHY layer sends the candidate resource set of the nth transmission requirement to the MAC layer; the MAC layer determines resources corresponding to the nth transmission requirement in the candidate resource set of the nth transmission requirement;

wherein any candidate resource set contains at least one candidate resource.

By the design, the first terminal device can determine the resource corresponding to the nth transmission requirement in a plurality of modes.

In one possible design, when determining, in parallel, the resource corresponding to each of the N transmission requirements, the first terminal device needs to ensure that a time interval between any two determined resources is greater than or equal to the minimum time interval.

In one possible design, the first terminal device/MAC layer may determine, first, a resource corresponding to the nth transmission requirement according to a sequence from the back to the front of the time domain position; then determining the resources corresponding to the N-1 th transmission requirement under the condition of meeting the requirement of the minimum time interval; and ending after determining the resource corresponding to the 1 st transmission requirement.

In one possible design, the first terminal device/MAC layer may determine, according to the order from the small to the large of the resource selection ranges, the resource corresponding to the transmission requirement with the smallest resource selection range; then determining the resource corresponding to the transmission requirement with the next smallest resource selection range under the requirement of meeting the minimum time interval; and ending the process until the resource corresponding to the transmission requirement with the largest resource selection range is determined.

In one possible design, the first terminal device/MAC layer may first select a resource from the candidate resource set with the smallest time domain range according to the order from the smallest time domain range to the largest time domain range of the candidate resource set; then, under the condition of meeting the requirement of the minimum time interval, selecting the next resource from the resource set to be selected with the time domain range being the next smallest; and finishing the process until one resource is selected from the candidate resource set with the largest time domain range.

Through the above designs, it can be ensured that the time interval between any two resources among the N resources determined by the first terminal device is greater than or equal to the minimum time interval.

In one possible design, the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n The following formula is satisfied:

Or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value; t is t _cpe For the duration of the cyclic prefix extension.

By this design, a sufficient time is reserved for LBT by the nth start time for the first terminal device, and therefore the design may reduce the probability of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

In one possible design, the first terminal device may determine the nth start time according to the LBT duration corresponding to the nth transmission requirement by:

determining the nth starting time according to the LBT duration corresponding to the nth transmission requirement and the resource corresponding to the prior transmission requirement of the nth transmission requirement; the N-th transmission request is a transmission request with a resource position located before the N transmission requests in the N transmission requests.

Since the first terminal device transmits data on the resources corresponding to the prior transmission requirements of the nth transmission requirement before the resources corresponding to the nth transmission requirement arrive in the LBT process of the nth transmission requirement, channels are occupied at the positions of the resources corresponding to the prior transmission requirements, and therefore the actual LBT duration of the first terminal device on the nth transmission requirement may be prolonged. Based on this, when determining the starting time of the resource selection range of the nth transmission requirement, the first terminal device needs to consider not only the LBT duration corresponding to the nth transmission requirement but also the resource corresponding to the previous transmission requirement of the nth transmission requirement. By this design, a sufficient time is reserved for LBT by the nth start time for the first terminal device, and therefore the design may reduce the probability of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

or alternatively

Or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value; t is t _cpe A duration extending for the cyclic prefix; t is t _i,R For the duration of the resource corresponding to the ith preceding transmission requirement of said nth transmission requirement,a sum of time durations of resources corresponding to n-1 prior transmission demands of the nth transmission demand; s is S _i,R The number of time units occupied by the resource corresponding to the ith preceding transmission need of said nth transmission need,/->And the sum of the number of time units occupied by the resources corresponding to the n-1 prior transmission requirements of the nth transmission requirement.

determining the nth starting time according to the LBT duration corresponding to the nth transmission requirement, the resource corresponding to the prior transmission requirement of the nth transmission requirement and the resource corresponding to the prior response of the nth transmission requirement; wherein the preceding transmission requirement of the nth transmission requirement is a transmission requirement that a resource position is located before the N transmission requirements in the N transmission requirements; the prior acknowledgement response of the nth transmission requirement includes an acknowledgement response that should be received by the first terminal device or other terminal devices before the resource corresponding to the nth transmission requirement.

Since the first terminal device transmits data on the resource corresponding to the previous transmission requirement of the nth transmission requirement before the resource corresponding to the nth transmission requirement arrives in the LBT process of the nth transmission requirement, the first terminal device or other terminal devices may receive the response on the resource corresponding to the previous response, so that the channel may be occupied on the resources corresponding to the previous transmission requirement and the position of the resource corresponding to the previous response, which may result in that the actual LBT duration of the first terminal device on the nth transmission requirement may be prolonged. Based on this, when determining the starting time of the resource selection range of the nth transmission requirement, the first terminal device needs to consider not only the LBT duration corresponding to the nth transmission requirement, but also the resource corresponding to the previous transmission requirement of the nth transmission requirement and the resource corresponding to the previous response. By this design, a sufficient time is reserved for LBT by the nth start time for the first terminal device, and therefore the design may reduce the probability of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

In one possible design, the prior reply response to the nth transmission requirement includes a reply response to the prior transmission requirement of the nth transmission requirement; or the prior acknowledgement response of the nth transmission requirement comprises an acknowledgement response of the prior transmission requirement of the nth transmission requirement and an acknowledgement response of at least one first transmission; the first transmission is a transmission which is monitored by the first terminal equipment and does not receive a response.

In one possible design, the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n To conform toThe following formula:

or alternatively

Or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value; t is t _cpe A duration extending for the cyclic prefix; t is t _i,R For the duration of the resource corresponding to the ith preceding transmission requirement of said nth transmission requirement,a sum of time durations of resources corresponding to n-1 prior transmission demands of the nth transmission demand; t is t _n,HARQ The total duration of the resources corresponding to the prior response of the nth transmission requirement is set; s is S _i,R The number of time units occupied by the resource corresponding to the ith preceding transmission need of said nth transmission need,/->The sum of the number of time units occupied by the resources corresponding to the n-1 prior transmission requirements of the nth transmission requirement; s is S _n,HARQ And the total number of time units occupied by the resources corresponding to the prior response of the nth transmission requirement.

In one possible design, the first terminal device may further perform the steps of:

in the process of transmitting data on the N resources, determining that the LBT duration corresponding to the nth transmission requirement is not finished; re-determining an nth starting time according to the LBT residual time length corresponding to the nth transmission requirement; and re-determining the resource corresponding to the nth transmission requirement according to the re-determined nth starting time.

Since when the first terminal device may occur to reach a resource corresponding to a certain transmission requirement in the process of transmitting data on the N resources, the LBT performed for the transmission requirement is not yet ended (i.e., the LBT duration corresponding to the transmission requirement is not ended), at this time, the first terminal device may also reselect the resource for the transmission requirement, so as to ensure the reliability of data transmission.

In one possible design, determining that the LBT duration corresponding to the nth transmission requirement is not ended includes at least one of: determining that the LBT duration corresponding to the nth transmission requirement is not ended at the first time; or determining that the first time length is smaller than the LBT residual time length corresponding to the nth transmission requirement; the first time is located before the starting time of the resource corresponding to the nth transmission requirement, or the first time is the starting time of the resource corresponding to the nth transmission requirement; the first duration is a duration between the first time and a start time of a resource corresponding to the nth transmission requirement.

In one possible design, before the first terminal device transmits data on the N resources, the kth start time may also be determined according to the LBT duration corresponding to the kth transmission requirement; the kth transmission requirement is a subsequent transmission requirement of the nth transmission requirement, k is a positive integer, and N < k is less than or equal to N; the kth starting time is the starting time of the resource selection range of the kth transmission requirement; determining a resource corresponding to the kth transmission requirement according to the kth starting time; after determining that the LBT duration corresponding to the nth transmission requirement is not ended, the first terminal device may further determine the kth starting time again according to the LBT remaining duration corresponding to the kth transmission requirement; or re-determining the kth starting time according to the LBT residual time length corresponding to the nth transmission requirement and the minimum time interval; re-determining the resource corresponding to the kth transmission requirement according to the re-determined kth starting time; wherein the time interval between any two of the re-determined resources is greater than or equal to the minimum time interval.

When the N-th transmission requirement of the N transmission requirements still has a subsequent transmission requirement, the time interval between any two resources may not meet the condition of the minimum time interval due to the change of the resources corresponding to the N-th transmission requirement, or the situation that the LBT duration corresponding to the subsequent transmission requirement is not ended when the start time of the subsequent transmission requirement is reached may occur. Therefore, in order to ensure availability of the resource corresponding to the subsequent transmission requirement, the first terminal device may further redetermine the resource corresponding to the subsequent transmission requirement.

In one possible design, before the first terminal device transmits data on the N resources, the kth start time may also be determined according to the LBT duration corresponding to the kth transmission requirement; the kth transmission requirement is a subsequent transmission requirement of the nth transmission requirement, k is a positive integer, and N < k is less than or equal to N; the kth starting time is the starting time of the resource selection range of the kth transmission requirement; determining a resource corresponding to the kth transmission requirement according to the kth starting time; after the first terminal device determines that the LBT duration corresponding to the nth transmission requirement is not ended, determining that the second duration is smaller than the remaining duration of the LBT corresponding to the kth transmission requirement; or determining that a second time after the second duration from the first time is later than the starting time of the resource corresponding to the kth transmission requirement; wherein the second duration is the sum of the LBT remaining duration corresponding to the nth transmission requirement and (k-n) minimum time intervals; the first time is the time when the LBT duration corresponding to the nth transmission requirement is not ended; re-determining a kth starting time according to the LBT residual time length corresponding to the kth transmission requirement; or re-determining the kth starting time according to the LBT residual time length corresponding to the nth transmission requirement and the minimum time interval; re-determining the resource corresponding to the kth transmission requirement according to the re-determined kth starting time; wherein the time interval between any two of the re-determined resources is greater than or equal to the minimum time interval.

When the N-th transmission requirement of the N transmission requirements still has a subsequent transmission requirement, the time interval between any two resources may not meet the condition of the minimum time interval due to the change of the resources corresponding to the N-th transmission requirement, or the situation that the LBT duration corresponding to the subsequent transmission requirement is not ended when the start time of the subsequent transmission requirement is reached may occur. Therefore, in order to ensure the availability of the resources corresponding to the post-transmission requirement, the first terminal device may further determine the resources corresponding to the post-transmission requirement, and only re-determine the resources corresponding to the post-transmission requirement with the risk of unavailability.

In one possible design, the first terminal device may determine N start times according to LBT durations corresponding to the N transmission requirements; the jth initial time in the N initial times is the initial time of the resource selection range of the jth transmission requirement in the N transmission requirements; when the N starting times do not exceed the third time, determining resources corresponding to the nth transmission requirement according to the nth starting time; the third time is a time after a third duration from the time when the transmission requirement occurs in the first terminal device, and the value of the third duration is determined according to the data transmission delay of the first terminal device.

By the design, since the starting time of the resource selection range of each transmission requirement does not exceed the third time, when the first terminal device transmits data on the determined N resources, the time delay of the data can be ensured to be within the data transmission time delay range of the first terminal device.

In one possible design, when the g-th start time exceeds the third time (where g is a positive integer and 1+.ltoreq.g+.N), the first terminal device may also implement resource allocation by:

mode one: sending a first resource request to a second terminal device; receiving first resource configuration information from the second terminal equipment; the first resource configuration information is used for indicating the resources allocated by the second terminal equipment for the first terminal equipment, the second terminal equipment is a receiving end of the N transmission requirements, and the transmission resources occupied by the first resource request are pre-negotiated or agreed by the first terminal equipment and the second terminal equipment;

mode two: sending a second resource request to the network device; receiving second resource configuration information from the network device; the second resource configuration information is used for indicating resources allocated by the network equipment for the first terminal equipment;

Mode three: transmitting data by using the resource of the residual transmission time COT of the second terminal equipment; the second terminal device is a receiving end of the N transmission requirements.

Since the starting time of the resource selection range of some transmission requirements exceeds the third time, even if the first terminal device determines N resources corresponding to the N transmission requirements, it may not be guaranteed that the delay of the data is within the data transmission delay range of the first terminal device. Based on the above, the first terminal device may continue to send data on the resource where the remaining COT of the second terminal device or the network device is located, thereby ensuring data transmission delay.

In one possible design, the first terminal device may obtain LBT durations corresponding to M transmission requirements; wherein the M transmission requirements include the N transmission requirements; m is an integer greater than N; determining M starting times according to LBT durations corresponding to the M transmission requirements; the M-th starting time in the M starting times is the starting time of the resource selection range of the M-th transmission requirement in the M transmission requirements; m is a positive integer, and M is more than or equal to 1 and less than or equal to M; wherein, in the M transmission requirements, the start time of the resource selection range of the N transmission requirements does not exceed a third time, and the start time of the resource selection range of the transmission requirements other than the N transmission requirements exceeds the third time; the third time is a time after a third duration from the time when the transmission requirement of the first terminal equipment appears, and the value of the third duration is determined according to the data transmission delay of the first terminal equipment; the first terminal device determines resources corresponding to the N transmission requirements, and does not determine resources corresponding to other transmission requirements except the N transmission requirements in the M transmission requirements; in the above case, after the first terminal device transmits data on the N resources, the first terminal device may determine, according to a transmission result indicated by the response of the N resources, whether to continue to transmit data on the resource where the remaining COT of the second terminal device or the network device is located; the second terminal device is a receiving end of the N transmission requirements.

When the start time of the resource selection range of only part of the M transmission requirements (i.e. the N transmission requirements) exceeds the third time, the first terminal device may determine only the resources corresponding to the part of the transmission requirements. In this way, after the first terminal device transmits data on the resources corresponding to the N transmission requirements, according to the transmission result indicated by the response responses of the N transmission requirements, it is determined whether to continue to transmit data on the resources where the remaining COT of the second terminal device or the network device is located. When the transmission result indicated by the response responses of the N transmission requirements indicates that the data transmission is successful, the first terminal equipment does not need to seek other resource allocation modes; and when the transmission result indicated by the response responses of the N transmission requirements indicates that the data transmission fails, the first terminal device may continue to transmit data by adopting the resource allocation mode in the previous design.

Optionally, when the first terminal device has a transmission requirement, starting LBT; or in the process of determining the N resources, starting LBT; or after determining the N resources, starting LBT.

Optionally, when the PHY layer transmits the nth start time to the MAC layer, starting LBT; or when the PHY layer sends the resource selection range of the nth transmission requirement to the MAC layer, starting LBT; or when the PHY layer transmits a start time unit of the resource selection range of the nth transmission requirement and a candidate resource set to the MAC layer, starting LBT; or when the PHY layer sends the candidate resource set of the nth transmission requirement to the MAC layer, starting LBT; or when the MAC layer informs the PHY layer of the resource corresponding to the nth transmission requirement, starting LBT.

In a second aspect, an embodiment of the present application provides a communication method, which may be applied to a terminal device in a SL-U system. The method comprises the following steps:

selecting a first resource in a first frequency band; transmitting the target data on a second resource of a second frequency band; wherein the bandwidth of the first frequency band is greater than the bandwidth of the second frequency band, or the bandwidth of the first frequency band is less than the bandwidth of the second frequency band; a resource mapping relation exists between the frequency domain position of the first resource and the frequency domain position of the second resource; the resource mapping relationship is used for mapping the first resource to the second resource.

By the method, the terminal equipment can realize resource mapping between the frequency bands with two different bandwidths. For example, if the terminal device reserves the first resource in the first frequency band for transmitting the target data, and then preempting the channel of the second frequency band through the LBT, at this time, the terminal device may map the first resource into the second frequency band to obtain the second resource by using the above method, so that the target data may be transmitted in the preempted channel.

In one possible design, the terminal device may select the second resource in the second frequency band according to the resource mapping relationship and the frequency domain position of the first resource; wherein the first resource comprises a first resource block, RB, and the second resource comprises a second RB; the frequency domain location of the first resource includes an RB number of the first RB in the first frequency band; the frequency domain location of the second resource includes an RB number of the second RB in the second frequency band; the resource mapping relationship is used for representing a mapping relationship between the RB numbers in the first frequency band and the RB numbers in the second frequency band.

Through the design, the terminal equipment can realize resource mapping between the frequency bands with two different bandwidths through the resource mapping relation.

In one possible design, the first frequency band includes L1 RBs, where L1 is a positive integer; the bandwidth of the first frequency band is B1, and the bandwidth of the second frequency band is B2, b2=x×b1, X >1; the second frequency band comprises X frequency sub-bands, the bandwidth of each frequency sub-band is B1, the first frequency band is positioned in a y-th frequency sub-band in the X frequency sub-bands, y is more than or equal to 1 and less than or equal to X, and y is an integer; in the resource mapping relationship, the RB number a in the first frequency band corresponds to the RB number (y-1) l1+c+a in the second frequency band; wherein a is an integer, 0.ltoreq.a < L1, and C is a constant; or in the resource mapping relation, the RB number L1-b in the first frequency band corresponds to the RB number y in the second frequency band; wherein b is an integer, 0<b is less than or equal to L1, and D is a constant.

In one possible design, the second frequency band includes L2 RBs, where L2 is a positive integer; the bandwidth of the first frequency band is B1, the bandwidth of the second frequency band is B2, b1=x×b2, X >1; the first frequency band comprises X frequency sub-bands, the bandwidth of each frequency sub-band is B2, the second frequency band is positioned in a y-th frequency sub-band in the X frequency sub-bands, y is more than or equal to 1 and less than or equal to X, and y is an integer; in the resource mapping relationship, the RB number a in the second frequency band corresponds to the RB number (y-1) l2+c+a in the first frequency band; wherein a is an integer, 0.ltoreq.a2 < L2, and C is a constant; or in the resource mapping relation, the RB number L2-b in the second frequency band corresponds to the RB number y×l2+d-b in the first frequency band; wherein b is an integer, 0<b is less than or equal to L2, and D is a constant.

In one possible design, the terminal device may further determine a first target subchannel from among a plurality of first subchannels corresponding to the first frequency band according to a frequency domain location of the first resource; determining a second target sub-channel in a plurality of second sub-channels corresponding to the second frequency band according to the frequency domain position of the second resource; when the number of RBs occupied by the second target sub-channel is larger than that occupied by the first target sub-channel, performing rate matching on the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal; or when the number of RBs occupied by the second target sub-channel is smaller than that occupied by the first target sub-channel, punching the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal; the coded signal is obtained by coding the target data according to the number of RBs occupied by the first target sub-channel; in this way, the terminal device may transmit the target signal on the second target subchannel.

Through the design, the terminal equipment can also realize the mapping of the sub-channels corresponding to different frequency bands.

In a third aspect, embodiments of the present application provide a communication apparatus comprising means for performing the steps of the above first to seventh aspects.

In a fourth aspect, an embodiment of the present application provides a terminal device, including a processor, a memory, and a processor; wherein the transceiver is used for receiving and transmitting signals; the memory is used for storing program instructions and data; the processor is configured to read the program instructions and data in the memory, and implement the method provided in the first aspect or the second aspect.

In a fifth aspect, embodiments of the present application provide a terminal device comprising at least one processing element and at least one storage element, wherein the at least one storage element is configured to store a program and data, and the at least one processing element is configured to perform the method provided in the first aspect or the second aspect of the present application.

In a sixth aspect, embodiments of the present application further provide a computer program, which when run on a computer causes the computer to perform the method provided in any one of the above aspects. Alternatively, the computer may be a terminal device.

In a seventh aspect, embodiments of the present application further provide a computer readable storage medium having a computer program stored therein, which when executed by a computer, causes the computer to perform the method provided in any of the above aspects. Alternatively, the computer may be a terminal device.

In an eighth aspect, embodiments of the present application further provide a chip, where the chip is configured to read a computer program stored in a memory, and perform the method provided in any one of the above aspects. Optionally, the chip may include a processor and a memory, where the processor is coupled to the memory, and is configured to read a computer program stored in the memory, to implement the method provided in the foregoing embodiment.

In a ninth aspect, embodiments of the present application further provide a chip system, where the chip system includes a processor, and the processor is configured to support a computer device to implement the method provided in any one of the above aspects. In one possible design, the chip system further includes a memory for storing programs and data necessary for the computer device. The chip system may be formed of a chip or may include a chip and other discrete devices.

Drawings

Fig. 1 is a schematic diagram of reserving resources in a sidelink scenario provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a communication scenario provided in an embodiment of the present application;

fig. 3 is a flowchart of a resource allocation method provided in an embodiment of the present application;

fig. 4 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

Fig. 5 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 6 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 7 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 8 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 9 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 10 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 12 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 13 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 14 is a schematic diagram of an example resource configuration provided in an embodiment of the present application;

fig. 15 is a schematic view of a resource configuration scenario provided in an embodiment of the present application;

fig. 16 is a schematic view of a resource configuration scenario provided in an embodiment of the present application;

fig. 17 is a flowchart of a communication method provided in an embodiment of the present application;

fig. 18 is a schematic diagram of distribution among bands of different bandwidths according to an embodiment of the present application;

fig. 19 is a block diagram of a communication device according to an embodiment of the present application;

Fig. 20 is a block diagram of a terminal device according to an embodiment of the present application.

Detailed Description

The application provides a resource allocation method and equipment, which are used for guaranteeing the communication efficiency of terminal equipment. The method and the device are based on the same technical conception, and because the principle of solving the problems by the method and the device is similar, the implementation of the device and the method can be mutually referred to, and the repetition is not repeated.

Some of the terms in this application are explained below to facilitate understanding by those skilled in the art.

1) The network device is a device for accessing the terminal device to the wireless network in the communication system. The network device acts as a node in the radio access network, which may also be referred to as a base station, and may also be referred to as a radio access network (radio access network, RAN) node (or device).

Currently, examples of some network devices are: a gNB, a transmission and reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (NB), an Access Point (AP), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), or a baseband unit (BBU), etc.

In addition, in one network structure, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure splits the protocol layer of the eNB in a long term evolution (long term evolution, LTE) system, the functions of part of the protocol layer are controlled in a CU (central control unit), and the functions of the rest part or all of the protocol layer are distributed in DUs, so that the CU controls the DUs in a centralized manner.

2) A terminal device is a device that provides voice and/or data connectivity to a user. The terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc.

For example, the terminal device may be a handheld device having a wireless connection function, various in-vehicle devices, a roadside unit, or the like. Currently, examples of some terminal devices are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a point of sale (POS), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned aerial vehicle (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), various smart meters (smart water meter, smart gas meter), an eLTE-DSA UE, a device with access backhaul integration (integrated access and backhaul, IAB) capability, a vehicle electronic control unit (electronic control unit, ECU), etc., a vehicle-mounted computer, a vehicle-mounted system, a remote information processor (smart BOX, T-BOX), etc.

3) Communication devices, devices capable of communicating with other devices to support wireless communication techniques. In the embodiment of the present application, the specific form of the communication device is not limited, and for example, the communication device may be a terminal device, a network device, or the like.

4) The frequency band is a section of continuous frequency resource, and is used as a carrier wave in the data transmission process of the communication equipment. In the embodiment of the application, the frequency band has two characteristics, namely a frequency point and a bandwidth. The frequency bin and bandwidth may determine the frequency range of the frequency band, including a minimum frequency boundary (which may also be referred to as a start frequency) and a maximum frequency boundary (which may also be referred to as an end frequency) of the frequency bin.

The frequency band may be divided into a plurality of subcarriers according to a subcarrier spacing (SCS) and a bandwidth of the frequency band. Illustratively, the SCS may take on values of 15kHz, 30kHz, 60kHz, etc.

In the frequency domain, one Resource Block (RB) may contain a fixed number of subcarriers, and thus, a plurality of RBs may be included in one frequency band. For example, 12 subcarriers in the frequency domain may constitute one RB.

5) Resources, i.e. time-frequency resources used for the communication device to transmit data, are also called physical resources. Resources are concepts in two dimensions, including the time domain and the frequency domain.

6) The time involved in the embodiments of the present application may be counted by a time unit in the conventional sense of seconds, milliseconds, microseconds, etc., and may also be counted by a time unit defined for a time domain resource in the communication field. By way of example, time units in the field of communications may include, but are not limited to: subframe (subframe), slot (slot), symbol (symbol), etc., which are not limited in this application.

7) The time unit is a unit or time granularity for scheduling time domain resources. By way of example, the time unit for scheduling the data transmission resource may be one slot, half slot, or several symbols, etc., which is not limited in this application.

8) And the response is used for indicating whether the data is successfully transmitted. The receiving end of the data sends according to the transmission condition of the data, so as to inform the transmitting end of the transmission condition of the data, and the transmitting end judges whether the data needs to be retransmitted or not according to the data transmission result indicated by the response.

In one embodiment, in a communication system supporting hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) technology, after one transmission by a sender, a receiver may feed back an acknowledgement response to the sender for the transmission case of the one transmission. The acknowledgement response may also be referred to as a hybrid automatic repeat request acknowledgement (HARQ-ACK), or HARQ acknowledgement, or HARQ response, abbreviated HARQ.

Generally, two types of response are included: acknowledgement (ACK) and negative Acknowledgement (Negative Acknowledgement, NACK). Wherein, ACK indicates successful data transmission; NACK indicates a data transmission failure.

9) "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" as used herein refers to two or more. At least one, meaning one or more.

In addition, it should be understood that in the description of this application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order.

Prior to introducing embodiments of the present application, some of the techniques involved in the embodiments of the present application will be described.

1. Resource allocation mode in sidelink scene

In the sidelink scenario, when the terminal device needs to transmit the target data, a plurality of discontinuous resources are reserved for the transmission (such as initial transmission and retransmission) of the target data, and then the terminal device can transmit the target data on the reserved resources. The embodiment of the present application does not limit the reserved resource number N, and may be a positive integer greater than or equal to 1, such as 4, 5, 10, 20, 24, 36, and the like. Optionally, the terminal device may determine, according to the number threshold of reserved resources, the number N of resources that need to be reserved at this time.

For example, the terminal device may determine the number N of reserved resources required for repeatedly transmitting the target data according to the reliability requirement of the target data. The higher the reliability requirement of the target data is, the more the number of repeated transmission is, and the larger the number N of resources needing to be reserved is; the lower the reliability requirement of the target data, the fewer the number of repeated transmissions, and the smaller the number of resources N that need to be reserved.

In one embodiment, when the medium access control (medium access control, MAC) layer of the terminal device determines that a transmission need is present (i.e., t ₀ ) The Physical (PHY) layer may be notified; the PHY layer may now be within the resource selection range t ₀ +T _offset ，t ₀ +T _PDB ]Select some candidate resources (which may be referred to as candidate resource sets hereinafter) and report the candidate resource sets to the MAC layer. The MAC layer may select N resources from the candidate set of resources. One resource corresponds to one transmission requirement, and each transmission requirement is used for performing one transmission (one retransmission of target data). The resource selection scope may also be referred to as a resource selection window.

Wherein T is _offset Starting time of resource selection range and time t of transmission requirement of terminal equipment ₀ Offset values between; t (T) _PDB According to the final conditionData transmission delay (e.g. packet delay margin (packet delay budget, PDB)) of end device, optionally T _PDB May be equal to or less than the data transmission delay. T (T) _offset And T _PDB The specific value of (2) is set by the terminal equipment, wherein the terminal equipment can be used for controlling the terminal equipment according to T _offset Determining T from the range of values of (2) _offset Is a value of (a). Exemplary, T is defined in Standard TS 38.214 _offset The range of the values is as followsFor SCS-related, reference may be made specifically to the description of the relevant definitions in the communication standard, which is not repeated here.

It should be noted that, among the N resources reserved by the terminal device, the time interval between any two resources is less than or equal to the minimum time interval (minimum gap). Wherein the minimum time interval is configured by the network device through radio resource control (radio resource control, RRC) signaling, or specified by the communication standard. In this way, the terminal device can receive the response to the previous resource and the processing delay for the response within the time interval. Therefore, the minimum time interval should be greater than or equal to the sum of the delay of the response to the previous resource, the duration of the resource corresponding to the response, and the processing delay of the terminal device for the response to the response.

Illustratively, referring to FIG. 1, a Physical (PHY) layer of a terminal device may sense channel conditions within a sensing window, at t ₀ When the MAC layer of the terminal equipment informs the PHY layer of the transmission requirement, the PHY layer selects the range [ t ] in the resource according to the perception result of the perception window ₀ +T _offset ，t ₀ +T _PDB ]Selecting a candidate resource set internally and reporting the candidate resource set to the MAC layer; the MAC layer selects 3 resources as shown in fig. 1 among the candidate resource sets according to the minimum time interval and informs the PHY layer of the 3 resources so that the PHY layer can transmit data on the 3 resources. Illustratively, in this application, the resources and transmission requirements are ordered in chronological order.

Wherein, the sensing window is the transmission requirement t of the terminal equipment ₀ The previous period of time, for terminal device awareness, may be expressed asT is the processing time delay of the terminal equipment _p In relation to the time slot data within the sensing window. Perception window and +.>Reference may be made to the description of the relevant definitions in the communication standard, which is not repeated here.

As shown by 3 resources reserved by the terminal device in fig. 1, the time interval between any two resources is greater than or equal to the minimum time interval. Thus, if the received acknowledgement response of the resource 1 is ACK after the terminal device transmits data on the resource 1, the terminal device may terminate transmitting data on the resource 2 and the resource 3, or transmit other data in the resource 2 and the resource 3, thereby avoiding resource waste.

2. Resource allocation in a sidelink scenario

In New Radio (NR), the resources of the sidelink transmission are based on a resource pool. The resource pool is a logical concept, and one resource pool includes a plurality of resources. Wherein any one of the resources is used for transmitting data. When the terminal equipment performs data transmission, one resource is required to be selected from the resource pool for transmission. The resource selection process of the terminal equipment has two cases:

case one: the resources used by the terminal device are configured by the network device. The terminal device may select resources from the resource pool to perform data transmission according to the indication information of the network device. This resource allocation is also referred to as Mode 1 (Mode 1).

And a second case: and the terminal equipment autonomously selects resources from the resource pool to perform data transmission. This resource allocation is referred to as Mode 2 (Mode 2).

Optionally, the frequency domain resources occupied by each resource pool include at least one subchannel (sub-channel). According to the current development, the frequency domain resources (RB number) occupied by each sub-channel are the same in one resource pool, and the frequency domain resources occupied by each sub-channel may be different in sub-channels belonging to different resource pools.

3. Access mechanism for sidelink-unlicensed spectrum (SL-U)

SL-U is an important topic in the current discussion of communication standards, the main content being the transmission of sidelink in unlicensed spectrum (unlicensed). Since the frequency domain resources used are unlicensed spectrum, the communication standard introduces two access mechanisms: type1 and Type 2.

Type1 is suitable for the scenario where the terminal device is preempting the channel, requiring the terminal device to listen before talk (listen before talk, LBT). I.e. the terminal device needs to monitor the channel before transmitting, and preempting the channel to transmit by using the channel after monitoring that the channel is idle.

Type 2 is suitable for sharing resources preempted by other terminal devices through Type 1. For example, the terminal device 1 may preempt the transmission opportunity (the standard is called channel occupation time (channel occupancy time, COT)) in a period of time through the Type1, and the terminal device may instruct other terminal devices to adopt the Type 2 to access the remaining COT of the occupied terminal device 1 in addition to performing data transmission in the COT. This act of sharing the COT to other terminal devices (illustrated as terminal device 2) is referred to as COT sharing (COT-sharing). Optionally, in some cases, there needs to be an association between terminal devices performing COT-sharing, for example, having a transceiving relationship or being located in the same terminal device group, etc.

In some embodiments, type 2 can be further divided into several cases, and Type 2A and Type 2B are described below as examples. Type 2A is that the terminal device 2 detects that the channel is idle within 25 μs after the other terminal device finishes transmitting, and occupies the channel, that is, the channel is unoccupied within 25 μs after the other terminal device perceives that the other terminal finishes transmitting, and then the terminal device 2 occupies the channel. Type 2B is that the terminal device 2 detects that the channel is idle within 16 μs after the other terminal devices end transmission, and occupies the channel. Type 2B differs from Type 2A in that the duration of the COT is additionally increased by 9 mus, i.e. the duration of one perceived time slot.

Wherein a sensing slot (sensing slot) is a time unit used for a terminal device to sense whether a channel is busy in an unlicensed spectrum. The duration corresponding to one perceived time slot may be 9 mus. In some embodiments of the present application, the perceived time slot is independent of the perceived window.

In some embodiments of the present application, the duration of the COT of the terminal device may be related to the channel reception priority (channel access priority class, CAPC) of the terminal device. Illustratively, when the cap of the terminal device is 1, the duration of the COT is 2ms at maximum; when the CAPC of the terminal equipment is 2, the duration of COT is 4ms at maximum; when the CAPC of the terminal device is 3 or 4, the duration of the COT is at most 6ms or 10ms.

4. LBT mechanism

Because of the sharing nature of unlicensed spectrum resources, it is easy to cause the same resource to be used by different communication devices (hereinafter, terminal devices are taken as an example) at the same time, so that a reasonable resource competition mechanism is needed to ensure that different communication devices on the same unlicensed frequency band are used to fairly coexist to perform resource competition. The resource contention mechanism is the LBT mechanism.

The LBT mechanism requires that the terminal device listen to the channel for clear channel assessment (clear channel assessment, CCA) detection (hereinafter referred to as channel detection) before transmitting data using unlicensed spectrum resources, and can only transmit data if the channel is guaranteed to be clear.

The main idea of LBT is: before the terminal device needs to transmit data, the terminal device may generate a random number R. The random number R is used to indicate the number of times that the channel is idle to be detected before data transmission. The terminal device may maintain the random number R by means of a counter, for example, the initial value of the counter is the random number R. The terminal equipment detects a channel in each sensing time slot after generating the random number R, and when detecting that the channel is idle in a certain sensing time slot, the counter is updated to reduce the count value by 1; if the terminal equipment detects that the channel is busy in a certain sensing time slot, the counter is stopped to be updated, and the channel detection is continued in each subsequent sensing time slot until the channel is idle, and the counter is started to count. The terminal device continuously detects the channel and updates the counter in the mode until the counter counts to 0, and starts to occupy the channel and transmit data.

It should be noted that the random numbers respectively generated by the terminal device may be different when performing LBT for different times. Wherein the terminal device can generate the random number in the random number value range. The random number value range may be related to the CAPC of the terminal device. Illustratively, when the CAPC of the terminal device is 1, the random number value range is [3,7]; when the CAPC of the terminal equipment is 2, the value range of the random number is [7,15]; when the CAPC of the terminal device is 3 or 4, the random number is in the range of [15,1023].

In the LBT mechanism, a random number R generated by the terminal device is used to indicate the number of times that a channel is idle needs to be detected before data transmission, in other words, the random number R is used to determine the number of perceived timeslots for channel detection.

Thus, based on the random number R, the LBT duration of the terminal device can be determined, e.g. the LBT duration is equal to t _sensing * R is equal to t _sensing * R+refer duration. And in the LBT process of the terminal equipment, according to the residual random number R _left And determining the LBT residual duration of the terminal equipment. Illustratively, the LBT remaining duration may be equal to t _sensing *R _left And or equal to t _sensing *R _left + defer duration. Wherein t is _sensing To perceive the duration of a slot, the refer duration = 16 mus + m _p *9μs。m _p The CAPC of the terminal device may be specifically described with reference to the relevant definition in the communication standard, which is not described herein.

The LBT duration may also be referred to as a back-off time window (contention window, CW) and the random number R may also be referred to as a back-off random number.

5. Cyclic prefix extension (cyclic prefix extension, CPE)

Unlike wireless fidelity (wireless fidelity, wiFi) systems, SL-U acts as a synchronous system, accessing only at specified time domain locations. Thus, for better channel occupancy, the terminal device may also send CPE to preempt the channel before accessing the channel. The length of time for which the terminal device specifically seizes the channel may be related to the CAPC of the terminal device, may be specified by a standard, or may be set internally by the terminal device.

The duration of the CPE transmitted by the terminal device may be denoted as t _cpe . Exemplary, t _cpe Typically not exceeding 1 symbol.

6. Resource allocation for new radio-unlicensed spectrum (NR-U)

In the NR-U scenario, the network device communicates with the terminal device over an unlicensed spectrum. The network device may schedule a plurality of terminal devices to transmit data to the network device in one time slot. Because the transmission of each terminal device is carried on either one time slot or a plurality of time slots in succession, the terminal device can send data in the COT of the network device or perform LBT preemption channels at the scheduled location of the network device, thus completing the transmission requirement.

Embodiments of the present application are specifically described below with reference to the accompanying drawings.

Fig. 2 shows a communication scenario to which the method provided in the embodiment of the present application is applicable. Referring to fig. 2, the communication scenario may include: a network device, and a plurality of terminal devices (such as terminal device a and terminal device b in fig. 2).

The network device is an entity capable of receiving and transmitting wireless signals at the network side, and is responsible for providing wireless access related services for terminal devices in a cell managed by the network device, and realizing physical layer functions, resource scheduling and wireless resource management, quality of service (Quality of Service, qoS) management, wireless access control and mobility management functions.

The terminal equipment is an entity capable of receiving and transmitting wireless signals at the user side, and needs to access the network through the network equipment.

In the communication scenario shown in fig. 2, the terminal device supports sidelink communication. The sidelink communication technology is a near field communication technology capable of direct connection between terminal devices, also called a proximity services (proximity services, proSe) communication technology, or a D2D communication technology. Based on this, a plurality of terminal devices which are located in a relatively close geographical location and support the sidelink communication may form a sidelink system, as shown in the sidelink system formed by the terminal device a and the terminal device b in fig. 2. In the sidelink system, sidelink communication can be performed between terminal devices.

Based on the communication scenario shown in fig. 2, the network device and the terminal device may be connected through an air interface (i.e. Uu interface), so that communication between the terminal device and the network device is achieved (such communication may be simply referred to as Uu communication, or cellular network communication). The adjacent terminal devices can communicate by establishing a sidelink connection through a Pc5 interface.

In the communication scenario shown in fig. 2, a terminal device in the sidelink system may use an unlicensed spectrum for data transmission. Thus, the sidelink system is also referred to as a SL-U system.

It should be noted that, as an example, the communication scenario shown in fig. 2 is not limited to the communication scenario applicable to the method provided in the embodiment of the present application. For example, various standards of communication technologies may be adopted between The network device and The terminal device, such as a fifth generation (The 5th Generation,5G) communication technology (i.e., NR technology), a 4G communication technology, a sixth generation (The 6th Generation,6G) communication technology, and a communication technology based on The above technical evolution. In addition, the sidelink-U system may be applicable to V2X, long term evolution-internet of vehicles (LTE-V), V2V, internet of vehicles, machine-like communications (Machine Type Communications, MTC), internet of things (internet of things, ioT), long term evolution-machine-to-machine (LTE-machine to machine, LTE-M), machine-to-machine (machine to machine, M2M), and the like, which are not limited in the present application.

As can be seen from the above description of the resource reservation technique in the sidelink scenario in the first aspect, the SL-U system and the NR-U system have different resource allocation manners, that is, in the SL-U system, the terminal device may reserve at least one resource for transmitting the target data, so as to ensure the transmission reliability of the target data. However, in the resource reservation scheme provided in the first aspect, the channel condition is not considered, and the SL-U system uses an unlicensed spectrum, and the channel condition is not considered, which may possibly cause multiple terminal devices to use the same resource for transmission, so as to affect the communication efficiency of the terminal devices.

Further, as can be seen from the above description of the access mechanism of the third point to the SL-U and the description of the LBT mechanism of the fourth point, when the terminal device seizes the channel in the unlicensed spectrum, it needs to monitor the channel through the LBT. Since the resource reservation scheme provided in the first point described above does not consider LBT duration, the following may occur when the scheme is used in SL-U: the starting time of the reserved resource is reached in the time domain, but the LBT of the terminal device is not yet ended, which results in the reserved resource being unavailable, thereby affecting the communication efficiency of the terminal device.

In order to solve the above problems and ensure the communication efficiency of the terminal equipment in the SL-U system, the embodiment of the present application provides a resource allocation method. The method may be applied in a communication scenario as shown in fig. 2. The method provided in the embodiment of the present application will be described in detail below with reference to the flowchart shown in fig. 3, taking the first terminal device and the second terminal device as examples.

S301: the first terminal equipment acquires Listen Before Talk (LBT) duration corresponding to the N transmission requirements. Wherein N is an integer greater than or equal to 1.

Optionally, each transmission requirement is a requirement of the first terminal device for transmitting the target data, where the 1 st transmission requirement is used for initially transmitting the target data, and the subsequent other transmission requirements are used for retransmitting the target data. Alternatively, when the first terminal device has a transmission requirement (denoted as t ₀ ) The MAC layer of the first terminal device may inform the PHY layer of the first terminal device, by which S301 is performed. In one embodiment, the PHY layer of the first terminal device may determine the number N of transmission requirements (i.e., the maximum number N of retransmissions of the target data).

Optionally, the occurrence of the transmission requirement by the first terminal device may include, but is not limited to: and when the first terminal equipment generates or receives target data to be transmitted. Since the MAC layer notifies the PHY layer of the occurrence of the transmission requirement when the first terminal device has the transmission requirement. Therefore, the time when the first terminal device has a transmission requirement may be defined as a time when the MAC layer notifies the PHY layer of the occurrence of the transmission requirement.

In one embodiment, the PHY layer of the first terminal device may generate a random number R for the N transmission requirements; the PHY layer may then determine LBT durations corresponding to the N transmission requirements according to the random number R, e.g., the LBT durations corresponding to the N transmission requirements are equal to t _sensing * R is equal to t _sensing * R+refer duration. In this embodiment, LBT durations corresponding to the N transmission requirements are the same.

In another embodiment, the PHY layer of the first terminal device may generate a corresponding random number for each transmission requirement separately; and then the PHY layer can respectively determine LBT duration corresponding to each transmission requirement according to the random number corresponding to each transmission requirement. Taking the nth transmission requirement as an example, the random number corresponding to the nth transmission requirement generated by the PHY layer is denoted as R _n Then the PHY layer may be configured to generate a random number R corresponding to the nth transmission requirement _n And determining the LBT duration corresponding to the nth transmission requirement. For example, the LBT duration corresponding to the nth transmission requirement is equal to t _sensing *R _n Or t _sensing *R _n + defer duration. Wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N. In this embodiment, LBT durations corresponding to different transmission requirements may be different.

Wherein t is _sensing To perceive the duration of the time slot.

S302: and the first terminal equipment determines N resources according to the LBT duration corresponding to the N transmission requirements. The N resources are in one-to-one correspondence with the N transmission requirements, and when N is an integer greater than 1, a time interval between any two resources is greater than or equal to a minimum time interval.

Through this step, the first terminal device may reserve resources according to LBT durations corresponding to the N transmission requirements. Because the LBT duration is considered, the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached can be reduced, so that the probability that the first terminal equipment can use the resource corresponding to the transmission requirement to transmit data can be improved, and the communication efficiency of the terminal equipment is ensured.

In addition, when the number of transmission requirements is multiple, the first terminal device needs to consider that the time interval between any two resources is greater than or equal to the minimum time interval, so as to ensure that the first terminal device can receive the response corresponding to the previous resource in the time interval, and perform subsequent processing on the result indicated by the response.

Optionally, in S302, the first terminal device may determine a resource corresponding to each transmission requirement according to an LBT duration corresponding to each transmission requirement. In the following, taking the nth transmission requirement as an example, the first terminal device may determine the resource corresponding to the nth transmission requirement through the following steps:

a1: and the first terminal equipment determines the nth starting time according to the LBT duration corresponding to the nth transmission requirement. Wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N; the nth start time is a start time of a resource selection range of the nth transmission requirement.

A2: and the first terminal equipment determines the resource corresponding to the nth transmission requirement according to the nth starting time.

It should be noted that, the first terminal device may determine, through A1, a start time of the resource selection range of the N transmission requirements, and then execute A2, so that when determining the N resources, the first terminal device may ensure that a time interval between any two resources is greater than or equal to a minimum time interval.

Alternatively, in the embodiment of the present application, the first terminal device may, but is not limited to, perform the above step A1 and determine the nth start time in any one of the following modes 1 to 3.

Mode 1: and the first terminal equipment determines the nth starting time according to the LBT duration corresponding to the nth transmission requirement, and does not consider other factors.

Based on this mode 1, the nth start time coincides with t ₀ +T _n . Wherein T is _n The following formula is satisfied:

or alternatively

Illustratively, the first terminal device generates the time t of the transmission requirement ₀ The PHY layer may be notified of the time at which the transmission need occurs for the MAC layer of the first terminal device. Alternatively, the time units used to schedule the data transmission resources may be time slots, half time slots, or less time granularity, which is not limited in this application. t is t _s The value of (2) may be specifically set according to the setting of the time unit. T (T) _offset Can be taken along with the parameters (T _offset ) Is a value of (a). Exemplary, t _cpe Typically not exceeding 1 symbol.

By means of mode 1, it can be ensured that the position of the nth start time determined by the first terminal device is not earlier than from t ₀ Starting to go through the position after the LBT period corresponding to the nth transmission requirement, i.e., (t) ₀ +T _n )≥(t ₀ +t _n,LBT ). Thus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) In between, the first terminal device may perform LBT. Since, according to mode 1, a sufficient time is reserved for LBT by the nth start time for the first terminal device, this mode can reduce the occurrence of the following situationsProbability of (2): when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

Further, in the scenario that the first terminal device sends the CPE before accessing the channel, the first terminal device considers not only the LBT duration corresponding to the nth transmission requirement, but also the duration t of the first terminal device sending the CPE _cpe It is thereby ensured that the position of the nth start time determined by the first terminal device is not earlier than from t ₀ Start to experience the LBT duration corresponding to the nth transmission requirement and experience the position after transmitting CPE, i.e. (t) ₀ +T _n )≥(t ₀ +t _n,LBT +t _cpe ). Thus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) The first terminal device may perform LBT and send CPE. Since, according to mode 1, sufficient time is reserved for LBT and transmitting CPE for the first terminal device before the nth start time, this mode may reduce the probability of the occurrence of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished or the CPE is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

Mode 2: when determining the nth starting time, the first terminal device may consider not only the LBT duration corresponding to the nth transmission requirement, but also the resource corresponding to the previous transmission requirement of the nth transmission requirement (i.e., the time domain resource occupied by the resource corresponding to the previous transmission requirement).

Thus, in mode 2, the first terminal device may perform step A1 by:

the first terminal equipment determines the nth starting time according to the LBT duration corresponding to the nth transmission requirement and the resource corresponding to the prior transmission requirement of the nth transmission requirement; the N-th transmission request is a transmission request with a resource position located before the N transmission requests in the N transmission requests. It should be noted that the nth transmission requirement will have a prior transmission requirement only if n is greater than 1. Whereas the 1 st transmission requirement has no preceding transmission requirement, so the start time of the resource selection range of the 1 st transmission requirement can be determined by the above-described mode 1.

In an exemplary embodiment of the present application, the N transmission requirements are ordered according to the time-domain sequence of the resource corresponding to the transmission requirement. Thus, the prior transmission requirement of the nth transmission requirement is the 1 st transmission requirement to the n-1 st transmission requirement.

Based on mode 2, the nth start time corresponds to t ₀ +T _n . Wherein T is _n The following formula is satisfied:

or alternatively

Or alternatively

Regarding t ₀ Time cell, t _s 、T _offset And t _cpe Reference may be made to the description in the above mode 1, and a detailed description is omitted here.

If the first terminal device transmits data on the resource corresponding to the previous transmission requirement of the nth transmission requirement, since the channel is occupied, as can be seen from the description of the LBT mechanism in the fourth technical description, the actual LBT duration of the nth transmission requirement may be prolonged during the LBT process for the nth transmission requirement. And the actual LBT duration of the nth transmission requirement may be extended by a first delay duration relative to the LBT duration corresponding to the nth transmission requirement determined in S301. The first delay duration is related to a total duration of resource occupation corresponding to the n-1 prior transmission requirements.

By means of mode 2, the position of the nth start time determined by the first terminal device can be ensured Thus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) In between, the first terminal device may perform LBT. Since a sufficient time is reserved for LBT for the first terminal device before the nth start time according to mode 2, this mode can reduce the occurrence of the followingProbability of condition: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

Further, in mode 2, the first terminal device considers not only the LBT duration corresponding to the nth transmission requirement, but also the duration t of the first terminal device transmitting the CPE _cpe Thereby ensuring the position of the nth starting time determined by the first terminal deviceThus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) The first terminal device may perform LBT and send CPE. Since, according to mode 2, sufficient time is reserved for LBT and transmitting CPE for the first terminal device before the nth start time, this mode may reduce the probability of the occurrence of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished or the CPE is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

With respect to mode 1, mode 2 also considers the time domain resource occupied by the resource corresponding to the previous transmission demand of the nth transmission demand, and therefore, with respect to mode 1, the nth start time calculated by mode 2 is increased by a first delay time length, where the first delay time length is greater than or equal to the sum of time lengths occupied by the resource corresponding to the previous transmission demand of the nth transmission demand. Based on this, the probability of the occurrence of the following case can be further reduced by the mode 2 with respect to the mode 1: and when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not ended yet.

Mode 3: when determining the nth starting time, the first terminal device may consider not only the LBT duration corresponding to the nth transmission requirement, but also the resource corresponding to the previous transmission requirement of the nth transmission requirement (i.e., the time domain resource occupied by the resource corresponding to the previous transmission requirement), and the resource corresponding to the previous response of the nth transmission requirement (i.e., the time domain resource occupied by the resource corresponding to the previous response).

Thus, in mode 3, the first terminal device may perform step A1 by:

and the first terminal equipment determines the nth starting time according to the LBT duration corresponding to the nth transmission requirement, the resource corresponding to the prior transmission requirement of the nth transmission requirement and the resource corresponding to the prior response of the nth transmission requirement.

Wherein the preceding transmission requirement of the nth transmission requirement is a transmission requirement that a resource position is located before the N transmission requirements in the N transmission requirements; the prior acknowledgement response of the nth transmission requirement includes an acknowledgement response that should be received by the first terminal device or other terminal devices before the resource corresponding to the nth transmission requirement. It should be noted that the nth transmission requirement will have a prior transmission requirement only if n is greater than 1. While the 1 st transmission requirement has no prior transmission requirement, the time domain resource occupied by the prior transmission requirement of the 1 st transmission requirement can be considered as 0.

It should also be noted that, in the preceding acknowledgement response of the nth transmission requirement, the acknowledgement response that should be received by the other terminal device may be determined by: after the first terminal device detects the transmissions of other terminal devices, the time position where the other terminal devices are expected to receive the response responses of the transmissions is located at t ₀ Then, and before the resource corresponding to the nth transmission requirement, the first terminal device may determine that the acknowledgement responses of these transmissions are prior acknowledgement responses of the nth transmission requirement.

In a first design, the prior acknowledgement response of the nth transmission requirement includes an acknowledgement response of the prior transmission requirement of the nth transmission requirement. In this design, the prior acknowledgement response of the nth transmission requirement includes acknowledgement responses of the 1 st transmission requirement to the n-1 st transmission requirement.

In a second design, the prior reply response to the nth transmission requirement includes a reply response to the prior transmission requirement of the nth transmission requirement and at least one first transmitted reply response; the first transmission is a transmission which is monitored by the first terminal device and does not receive the response, namely, a transmission which may receive the response later. In this design, the prior acknowledgement response of the nth transmission requirement includes acknowledgement responses of the 1 st transmission requirement to the n-1 st transmission requirement, and acknowledgement responses of the first transmission. In summary, the preceding acknowledgement response of the nth transmission requirement may include the expected time domain position of the first terminal device at t ₀ And then, responding before the nth transmission requirement corresponding resource.

Alternatively, the first transmission may be at t for the first terminal device or other terminal devices ₀ Transmission of the reply response has occurred previously but has not been received.

Alternatively, the first terminal device may be at t ₀ Front monitoring channels; if the first transmission is not monitored, the first terminal device may determine that the previous reply response to the nth transmission requirement includes a reply response to the previous transmission requirement of the nth transmission requirement (i.e., the first design described above); if at least one first transmission is monitored, the terminal device may determine that the previous acknowledgement response of the nth transmission requirement includes an acknowledgement response of the previous transmission requirement of the nth transmission requirement, and at least one acknowledgement response of the first transmission (i.e., the second design described above).

Based on mode 3, the nth start time corresponds to t ₀ +T _n . Wherein T is _n The following formula is satisfied:

or alternatively

Or alternatively

Regarding t ₀ Time cell, t _s 、T _offset And t _cpe Is described in (2)For the description, reference may be made to the description in the above mode 1, and the description is not repeated here.

When the first terminal device transmits data on the resource corresponding to the previous transmission requirement of the nth transmission requirement, or some terminal devices (i.e. the receiving end of the at least one first transmission) transmit an acknowledgement response on the resource corresponding to the previous acknowledgement response of the nth transmission requirement, as the channel is occupied, as can be seen from the description of the LBT mechanism in the fourth technical description, the actual LBT duration of the nth transmission requirement may be prolonged during the LBT process for the nth transmission requirement. And the actual LBT duration of the nth transmission requirement may be extended by a second delay duration relative to the LBT duration corresponding to the nth transmission requirement determined in S301. The second delay period is associated with: and the sum of the total time length of the resource occupation corresponding to the n-1 prior transmission demands and the total time length of the resource occupation corresponding to the prior response of the nth transmission demand.

By means 3, the position of the nth start time determined by the first terminal device can be ensured Thus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) In between, the first terminal device may perform LBT. Since, according to mode 3, a sufficient time is reserved for LBT for the first terminal device before the nth start time, this mode can reduce the probability of the occurrence of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

Further, in mode 3, the first terminal device considers not only the LBT duration corresponding to the nth transmission requirement, but also the received LBT durationThe duration t of the CPE sent by the first terminal equipment _cpe Thereby ensuring the position of the nth starting time determined by the first terminal deviceThus, at t ₀ With the nth start time (i.e. t ₀ +T _n ) The first terminal device may perform LBT and send CPE. Since mode 3 reserves enough time for the first terminal device to perform LBT and transmit CPE before the nth start time, this mode may reduce the probability of: when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not finished or the CPE is not finished, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

Compared with the mode 2, the mode 3 also considers the time domain resource occupied by the resource corresponding to the prior response of the nth transmission requirement, so compared with the mode 2, the second delay time length is increased in the nth starting time calculated by the mode 3, and the second delay time length is greater than or equal to the sum of the time lengths occupied by the resource corresponding to the prior response of the nth transmission requirement. Based on this, the probability of the occurrence of the following case can be further reduced by the mode 3 with respect to the mode 2: and when the resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not ended yet.

Alternatively, in the embodiment of the present application, the first terminal device may, but is not limited to, perform step A2 in the following manner. The following description will proceed with the n-th transmission requirement as an example.

Mode one: the first terminal device determines the resource selection range of the nth transmission requirement according to the nth starting time (namely, the starting time of the resource selection range of the nth transmission requirement); and then, the first terminal equipment determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement.

Optionally, the start time of the resource selection range of the nth transmission requirement is determined, and the end time of the resource selection range of the nth transmission requirement is determined by the data transmission delay PDB of the first terminal device. For example, the end time of the resource selection range is t ₀ +T _PDB . Wherein t is ₀ T for the time when the transmission requirement occurs for the first terminal device _PDB For determining, e.g. T, based on the data transmission delay of the first terminal device _PDB May be less than or equal to the data transmission delay of the first terminal device.

Mode two: the first terminal device determines a starting time unit of the resource selection range of the nth transmission requirement according to the nth starting time (namely, the starting time of the resource selection range of the nth transmission requirement); the first terminal device may also determine a candidate set of resources; and finally, the first terminal equipment determines the resource corresponding to the nth transmission requirement in the resource candidate set according to the resource selection range starting time unit of the nth transmission requirement.

Optionally, the resource corresponding to the nth transmission requirement is after the resource selection range start time unit of the nth transmission requirement.

Optionally, the candidate resource set may include candidate resources corresponding to the N transmission requirements. The candidate resource set may be selected for the first terminal device, and a specific process may refer to a description in the first technical description, which is not described herein. The first terminal device may, for example, at [ t ] based on the perceived result in the perceived window ₀ +T _offset ，t ₀ +T _PDB ]The set of candidate resources determined in (c).

Optionally, a time interval between any two candidate resources in the candidate resource set is greater than or equal to the minimum time interval.

Mode three: the first terminal device determines a candidate resource set of the nth transmission requirement according to the nth starting time (namely, the starting time of the resource selection range of the nth transmission requirement); and then, the first terminal equipment determines the resource corresponding to the nth transmission requirement in the candidate resource set of the nth transmission requirement.

Optionally, in the candidate resource set, a start time of a first candidate resource (i.e., a candidate resource with a forefront time of the time domain position) is equal to or greater than the nth start time. Optionally, the second candidate resource (i.e. the last candidate resource in the time domain location) has an end time less than t ₀ +T _PDB 。

It should be further noted that, the first to third modes are described by taking the nth transmission requirement as an example for the sake of clarity of description. However, in a practical scenario, each of the steps in the first to third modes is executed in parallel by the first terminal device for the N transmission requirements, and after the previous step is executed for the N transmission requirements, the following steps are executed in parallel.

Since the resource allocation procedure may involve the PHY layer and the MAC layer of the first terminal device, the resource allocation procedure of the above steps A1-A2 is exemplarily described below in terms of the PHY layer and the MAC layer.

In A1, the PHY layer determines the nth start time according to the LBT duration corresponding to the nth transmission requirement.

Embodiment one: the first terminal device implements the case of the step A2 through the first mode. The PHY layer and the MAC layer of the first terminal device perform the following steps:

a2-1-1: the PHY layer transmits the nth start time to the MAC layer.

A2-1-2: and the MAC layer determines the resource selection range of the nth transmission requirement according to the nth starting time.

A2-1-3: and the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement.

The resource selection range may refer to the description of the first embodiment, and will not be described herein.

Embodiment two: the first terminal device implements the case of the step A2 through the first mode. The PHY layer and the MAC layer of the first terminal device perform the following steps:

a2-2-1: and the PHY layer determines the resource selection range of the nth transmission requirement according to the nth starting time.

A2-2-2: the PHY layer transmits the resource selection range of the nth transmission requirement to the MAC layer.

A2-2-3: and the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement.

The resource selection ranges in the first embodiment and the second embodiment may refer to the description of the resource selection range in the first embodiment, and are not repeated here.

Embodiment III: and the first terminal equipment realizes the condition of the step A2 through the second mode. The PHY layer and the MAC layer of the first terminal device perform the following steps:

a2-3-1: and the PHY layer determines a starting time unit of the resource selection range of the nth transmission requirement according to the nth starting time.

A2-3-2: the PHY layer sends a start time unit of the resource selection range of the nth transmission requirement and a candidate resource set to the MAC layer.

It should be noted that the candidate resource set is one set, which is applicable to the N transmission requirements. I.e. the MAC layer may select a resource corresponding to each of the N transmission requirements from the candidate resources.

A2-3-3: and the MAC layer determines the resource corresponding to the nth transmission requirement in the resource candidate set according to the resource selection range starting time unit of the nth transmission requirement.

The candidate resource set in the third embodiment may refer to the description of the candidate resource set in the second mode, which is not described herein.

Embodiment four: and the first terminal equipment realizes the condition of the step A2 through the third mode. The PHY layer and the MAC layer of the first terminal device perform the following steps:

a2-4-1: and the PHY layer determines the candidate resource set of the nth transmission requirement according to the nth starting time.

A2-4-2: the PHY layer sends the candidate set of resources for the nth transmission need to the MAC layer.

A2-4-3: and the MAC layer determines the resource corresponding to the nth transmission requirement in the candidate resource set of the nth transmission requirement.

The candidate resource set in the fourth embodiment may refer to the description of the candidate resource set in the third mode, which is not described herein.

It should be noted that, for the sake of clarity, the first to fourth embodiments are described by taking the nth transmission requirement as an example. However, in a practical scenario, each step in the first to fourth embodiments is executed in parallel by the first terminal device for the N transmission requirements, and after the previous step is executed for the N transmission requirements, the following steps are executed in parallel.

It should be noted that, in the first to third modes, when determining, in parallel, the resource corresponding to each of the N transmission requirements, the first terminal device needs to ensure that a time interval between any two determined resources is greater than or equal to the minimum time interval. Similarly, in the first to fourth embodiments, when determining the resources corresponding to each of the N transmission requirements in parallel, the MAC layer of the first terminal device needs to ensure that the time interval between any two determined resources is greater than or equal to the minimum time interval.

In one embodiment, the first terminal device/MAC layer may determine, according to the time domain position from the back to the front, the resource corresponding to the nth transmission requirement; then determining the resources corresponding to the N-1 th transmission requirement under the condition of meeting the requirement of the minimum time interval; and ending after determining the resource corresponding to the 1 st transmission requirement.

In another embodiment, the first terminal device/MAC layer may determine, according to the order from the small to the large of the resource selection ranges, the resource corresponding to the transmission requirement with the smallest resource selection range; then determining the resource corresponding to the transmission requirement with the next smallest resource selection range under the requirement of meeting the minimum time interval; and ending the process until the resource corresponding to the transmission requirement with the largest resource selection range is determined.

Similarly, in another embodiment, the first terminal device/MAC layer may first select, in order from small to large in a time domain range of the set of resources to be selected, one resource from the set of resources to be selected having the smallest time domain range; then, under the condition of meeting the requirement of the minimum time interval, selecting the next resource from the resource set to be selected with the time domain range being the next smallest; and finishing the process until one resource is selected from the candidate resource set with the largest time domain range.

It should be noted that, the first terminal device may start LBT for the N transmission requirements simultaneously. Alternatively, the first terminal device may start LBT by, but not limited to, the following means:

mode a: when the first terminal device has a transmission requirement (i.e. at t ₀ At that time), LBT is started.

Mode b: and in the process of determining the N resources, starting LBT.

In the first terminal device determining the N resources in the above manner, the first terminal device may start LBT after determining the N resource selection ranges of the transmission requirements.

In the second determining the N resources by the first terminal device, the first terminal device may start LBT after determining a start time unit of the resource selection range of the N transmission requirements, or after determining a candidate resource set.

In the third determining the N resource by the first terminal device, the first terminal device may start LBT after determining the candidate resource set of the N transmission requirements.

Illustratively, in the first terminal device determining the N resources according to the first embodiment, the LBT is started when the PHY layer sends the start time of the resource selection range of each of the N transmission requirements to the MAC layer.

In the process of determining the N resources by the first terminal device according to the second embodiment, the PHY layer starts LBT when sending, to the MAC layer, the resource selection range of each of the N transmission requirements.

In the first terminal device determining the N resources according to the third embodiment, LBT is started when the PHY layer sends, to the MAC layer, a start time unit of a resource selection range of each of the N transmission requirements and a candidate resource set.

In the process of determining the N resources by the first terminal device according to the fourth embodiment, LBT is started when the PHY layer sends the candidate resource set for each of the N transmission requirements to the MAC layer.

Mode c: after the N resources are determined, LBT is started.

In an exemplary case where the first terminal device determines the N resources through the first to fourth embodiments, when the MAC layer determines the N resources, LBT starts when the MAC layer notifies the PHY layer of the N resources.

As shown in fig. 3, after the first terminal device determines the N resources through S301 to S302, the first terminal device may transmit data to the second terminal device on the N resources, that is, transmit data on each resource separately, where the second terminal device is a receiving end of the N transmission requirements. In the process that the first terminal device transmits data on the N resources, it may happen that the first terminal device arrives at a resource corresponding to a certain transmission requirement, and LBT performed for the transmission requirement is not yet ended (i.e., the LBT duration corresponding to the transmission requirement is not ended), where the first terminal device may also reselect a resource for the transmission requirement. The following description will proceed with the n-th transmission requirement as an example.

S1: and in the process of transmitting data on the N resources, the first terminal equipment determines that the LBT duration corresponding to the nth transmission requirement is not ended.

Optionally, the first terminal device determines that the LBT duration corresponding to the nth transmission requirement is not ended, including at least one of the following:

determining that the LBT duration corresponding to the nth transmission requirement is not ended at the first time; or alternatively

Determining that the first time length is smaller than the LBT residual time length corresponding to the nth transmission requirement;

the first time is located before the starting time of the resource corresponding to the nth transmission requirement, or the first time is the starting time of the resource corresponding to the nth transmission requirement; the first duration is a duration between the first time and a start time of a resource corresponding to the nth transmission requirement. For example, when the first time is the start time of the resource corresponding to the nth transmission requirement, the value of the first duration is 0.

Illustratively, the first terminal device receives a first signal at the first time (hereinafter t ₁ ) Determining a remaining random number R corresponding to the nth transmission requirement _n,left And if the LBT duration is greater than 0, determining that the LBT duration corresponding to the nth transmission requirement is not ended.

Further exemplary, the first terminal device is at t ₁ Determining a remaining random number R corresponding to the nth transmission requirement _n,left Equal to 0, but since the LBT duration corresponding to the nth transmission requirement further includes a defer duration, it may also be determined that the LBT duration corresponding to the nth transmission requirement is not ended; and at this time, the LBT remaining duration corresponding to the nth transmission requirement may be equal to the defer duration.

S2: and the first terminal equipment redetermines the nth starting time according to the LBT residual duration corresponding to the nth transmission requirement.

Optionally, the first terminalThe device can be based on the remaining random number R _n,left Determining the LBT remaining time t corresponding to the nth transmission requirement _n,LBT,left I.e. t _n,LBT,left ＝t _sensing *R _n,left Or t _n,LBT,left ＝t _sensing *R _n,left + defer duration.

Optionally, the first terminal device may use the concept in step A1, and redetermine the nth starting time according to the LBT remaining duration corresponding to the nth transmission requirement. The manner of re-determining the nth start time will be described below in accordance with the manner in which the first terminal apparatus determines the nth start time in step A1.

Mode 1-1: the first terminal device executes step A1 in mode 1. In this case, when the first terminal device redetermines the nth starting time, the LBT remaining duration corresponding to the nth transmission requirement may be considered, without considering other factors.

Based on mode 1-1, the n-th start time redetermined corresponds to t ₀ +T _n '. Wherein T is _n ' the following formula is satisfied:

or alternatively

Wherein t is ₁ And determining the time when the LBT duration corresponding to the nth transmission requirement is not ended, namely the first time. Other parameters in the formula may refer to the description in the above mode 1, and are not repeated here.

Mode 2-1: the first terminal device executes step A1 in mode 2. In this case, when the first terminal device redetermines the nth starting time, not only the LBT remaining duration corresponding to the nth transmission requirement but also the resource corresponding to the target previous transmission requirement of the nth transmission requirement (i.e., theTime domain resources occupied by resources corresponding to the target prior transmission needs). Wherein the target prior transmission requirement is that the resource position is located before the nth transmission requirement in the N transmission requirements, and at t ₀ To t ₁ And the first terminal equipment does not transmit the transmission requirement of the data on the corresponding resource.

The number of preceding transmission requirements targeted by the nth transmission requirement is H, namely from the nth-H transmission requirement to the nth-1 transmission requirement in the N transmission requirements. H is a positive integer.

Based on mode 2-1, the n-th start time re-determined corresponds to t ₀ +T _n '. Wherein T is _n ' the following formula is satisfied:

or alternatively

Or alternatively

Wherein t is ₁ And determining the time when the LBT duration corresponding to the nth transmission requirement is not ended, namely the first time. t is t _i,R For the duration of the resource corresponding to the ith transmission requirement,the sum of the time durations of the resources corresponding to the prior transmission demands of the H targets of the nth transmission demand is used; s is S _i,R The number of time units occupied by the resource corresponding to the ith transmission need, +.>And the sum of the number of time units occupied by the resources corresponding to the prior transmission requirements of the H targets of the nth transmission requirement is used. Other parameters in the formula may refer to the description in the above mode 2, and will not be repeated here.

Mode 3-1: in this case, when the first terminal device redetermines the nth starting time, not only the LBT remaining duration corresponding to the nth transmission requirement, but also the resource corresponding to the target previous transmission requirement of the nth transmission requirement (i.e., the time domain resource occupied by the resource corresponding to the target previous transmission requirement) and the resource corresponding to the target previous response of the nth transmission requirement (i.e., the time domain resource occupied by the resource corresponding to the previous response) may be considered. Wherein the target prior transmission requirement is that the resource position is located before the nth transmission requirement in the N transmission requirements, and at t ₀ To t ₁ And the first terminal equipment does not transmit the transmission requirement of the data on the corresponding resource.

The target prior acknowledgement response of the nth transmission requirement is included at t ₁ And then, before the resources corresponding to the nth transmission requirement, the first terminal equipment or other terminal equipment receives the response. Optionally, the target prior acknowledgement response includes an acknowledgement response of the target prior transmission requirement of the nth transmission requirement, and may further include at least one acknowledgement response of the second transmission. Wherein the second transmission is that the first terminal equipment is at t ₁ The previously monitored transmission of no response is received.

Similar to the above-mentioned "response to be received by other terminal devices in the preceding response to the nth transmission requirement" in the above-mentioned mode 3, the response to be received by other terminal devices in the present mode 3-1 is also that the time position where the other terminal devices are expected to receive the response to the transmissions is located at t after the first terminal device detects the transmissions of the other terminal devices ₀ Then, at the resource corresponding to the nth transmission requirementPreviously determined.

Based on mode 3-1, the n-th start time redetermined corresponds to t ₀ +T _n '. Wherein T is _n ' the following formula is satisfied:

or alternatively

Or alternatively

/>

Wherein t is ₁ And determining the time when the LBT duration corresponding to the nth transmission requirement is not ended, namely the first time. t is t _i,R For the duration of the resource corresponding to the ith transmission requirement,the sum of the time durations of the resources corresponding to the prior transmission demands of the H targets of the nth transmission demand is used; s is S _i,R The number of time units occupied by the resource corresponding to the ith transmission need, +.>The sum of the number of time units occupied by the resources corresponding to the prior transmission requirements of the H targets of the nth transmission requirement; t' _n,HARQ The total duration of the resources corresponding to the target prior response of the nth transmission requirement is set; s'. _n,HARQ And the total number of time units occupied by the resources corresponding to the target prior response of the nth transmission requirement.

Other parameters in the formula may refer to the description in the above mode 2, and will not be repeated here.

By the above way, a sufficient time can be reserved for the LBT remaining duration corresponding to the nth transmission requirement by the first terminal device before the redetermined nth starting time, so that the probability of the occurrence of the following situations can be reduced: when the re-determined resource corresponding to the nth transmission requirement is reached, the LBT duration of the nth transmission requirement is not ended, so that the probability that the first terminal device can use the resource corresponding to the nth transmission requirement to transmit data can be improved.

S3: and the first terminal equipment redetermines the resource corresponding to the nth transmission requirement according to the redetermined nth starting time.

The implementation manner of the first terminal device to execute S3 may refer to the specific description of step A2, which is not described herein.

Through the above S1-S3, the resource corresponding to the nth transmission requirement may be redetermined. However, when there is a subsequent transmission requirement of the nth transmission requirement among the N transmission requirements, the time interval between any two resources may not satisfy the condition of the minimum time interval due to the change of the resources corresponding to the nth transmission requirement, or the LBT duration corresponding to the subsequent transmission requirement does not end when the start time of the subsequent transmission requirement is reached. Based on this, the embodiment of the application further redetermines the resource corresponding to the later transmission requirement through the following two embodiments.

First embodiment: and after the first terminal equipment determines that the LBT duration corresponding to the nth transmission requirement is not finished through the S1, directly determining the resource corresponding to the subsequent transmission requirement of the nth transmission requirement through the following steps. The following description will take the following transmission requirement of the nth transmission requirement as the kth transmission requirement as an example.

F1: the first terminal equipment redetermines the kth starting time according to the LBT residual time length corresponding to the kth transmission requirement; or re-determining the kth starting time according to the LBT residual time length corresponding to the nth transmission requirement and the minimum time interval. Wherein k is a positive integer, and N < k is less than or equal to N; the kth starting time is the starting time of the resource selection range of the kth transmission requirement;

in one implementation manner, the first terminal device may redetermine the kth start time according to the LBT remaining duration corresponding to the kth transmission requirement. For specific procedures, reference may be made to the descriptions in the modes 1-1, 2-1 and 3-1 in the above S2, and the descriptions are omitted here.

In another implementation manner, the first terminal device may redetermine the kth start time according to the LBT remaining duration corresponding to the nth transmission requirement and the minimum time interval. For specific procedures, reference may also be made to the descriptions in the modes 1-1, 2-1 and 3-1 in the above S2, and the descriptions are omitted here. The following is a detailed description.

Mode 1-2: the n-th start time of the redetermination corresponds to t ₀ +T _k '. Wherein T is _k ' the following formula is satisfied:

or->

Wherein t is _mingap Is the duration of the minimum time interval.

Mode 2-2: the k-th start time determined again corresponds to t ₀ +T _k '. Wherein T is _n ' the following formula is satisfied:

or alternatively

Or alternatively

The number of target prior transmission requirements of the kth transmission requirement is J, namely from the kth-J transmission requirements to the kth-1 transmission requirement in the N transmission requirements.The sum of the durations of the resources corresponding to the J target prior transmission requirements of the kth transmission requirement; />And the sum of the number of time units occupied by the resources corresponding to the prior transmission requirements of the J targets of the kth transmission requirements.

Mode 3-2: the k-th start time determined again corresponds to t ₀ +T _k '. Wherein T is _n ' the following formula is satisfied:

or alternatively

Or alternatively

The number of target prior transmission requirements of the kth transmission requirement is J, namely from the kth-J transmission requirements to the kth-1 transmission requirement in the N transmission requirements.The sum of the durations of the resources corresponding to the J target prior transmission requirements of the kth transmission requirement; />The sum of the number of time units occupied by the resources corresponding to the J target prior transmission requirements of the kth transmission requirement; t' _k,HARQ A total duration of the resource corresponding to the target prior response of the kth transmission requirement; s'. _k,HARQ And the total number of time units occupied by the resources corresponding to the target prior response of the kth transmission requirement.

By the above way, a sufficient time can be reserved for the LBT remaining duration corresponding to the kth transmission requirement by the first terminal device before the redetermined kth starting time, so that the probability of the occurrence of the following situations can be reduced: when the re-determined resource corresponding to the kth transmission requirement is reached, the LBT duration of the kth transmission requirement is not ended, so that the probability that the first terminal device can use the resource corresponding to the kth transmission requirement to transmit data can be improved. In addition, the manner may also consider that the time interval between any two re-determined resources is greater than or equal to the minimum time interval, and reserve enough time for the time interval between any two resources.

F2: the first terminal equipment redetermines the resource corresponding to the kth transmission requirement according to the redetermined kth starting time; wherein, in the nth transmission requirement and the subsequent transmission requirement of the nth transmission requirement, the time interval between any two redetermined resources is greater than or equal to the minimum time interval.

The implementation manner of executing F2 by the first terminal device may refer to the specific description of step A2, which is not described herein.

Second embodiment: after the first terminal device determines that the LBT duration corresponding to the nth transmission requirement is not finished through S1, it may also determine whether the resource corresponding to the subsequent transmission requirement of the nth transmission requirement needs to be redetermined through at least one of the following determination conditions. The following description will proceed taking the following transmission requirement of the nth transmission requirement as the kth transmission requirement as an example.

Condition one: determining that the second duration is smaller than the LBT residual duration corresponding to the kth transmission requirement;

condition II: determining that a second time after the second duration from the first time is later than the starting time of the resource corresponding to the kth transmission requirement;

wherein the second duration is the sum of the LBT remaining duration corresponding to the nth transmission requirement and (k-n) minimum time intervals; the first time is a time (i.e. t) for determining that the LBT duration corresponding to the nth transmission requirement is not ended ₁ )。

Optionally, the above judgment condition may further include a condition three: the time interval between the resource corresponding to the re-determined kth-1 transmission requirement and the resource corresponding to the kth transmission requirement is less than the minimum time interval. Of course, based on the time interval between any two resources being less than the minimum time interval, condition three may also derive the following: the time interval between the resource corresponding to the k-j transmission requirement and the resource corresponding to the k transmission requirement is smaller than the total duration of j minimum time intervals.

Optionally, when the above at least one condition is met, a situation may occur that the LBT duration corresponding to the kth transmission requirement is not ended when the start time of the kth transmission requirement is reached, which may cause the resource corresponding to the kth transmission requirement to be unavailable. In order to improve the probability that the first terminal device can use the resource corresponding to the kth transmission requirement to transmit data, the first terminal device may redetermine the resource corresponding to the kth transmission requirement, and the specific process may refer to the above steps F1-F2, which are not repeated herein.

In summary, the embodiment of the present application provides a resource allocation method, by which a first terminal device may reserve N resources according to LBT durations corresponding to N transmission requirements. Because the LBT duration is considered, the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached can be reduced, so that the probability that the first terminal equipment can use the resource corresponding to the transmission requirement to transmit data can be improved, and the communication efficiency of the terminal equipment is ensured.

Based on the resource allocation method provided by the embodiment shown in fig. 3, the embodiment of the present application further provides the following implementation one to embodiment four. Each of the embodiments is described below.

Embodiment one:

the first terminal device determines N resources according to LBT durations corresponding to the N transmission requirements, as shown in fig. 4. The N resources are in one-to-one correspondence with the N transmission requirements, and when N is an integer greater than 1, the N resources are required to meet a requirement of a minimum time interval. In fig. 4, LBT duration 1, LBT duration 2, and LBT duration 3 are respectively the LBT duration corresponding to the 1 st transmission requirement, the LBT duration corresponding to the 2 nd transmission requirement, and the LBT duration corresponding to the 3 rd transmission requirement; the resource 1, the resource 2 and the resource 3 are respectively the resource corresponding to the 1 st transmission requirement, the resource corresponding to the 2 nd transmission requirement and the resource corresponding to the 3 rd transmission requirement. The resource selection range (original) in fig. 4 is a conventional resource selection range in the resource allocation scheme without considering the LBT duration, and may specifically refer to the first technical description above, or refer to the resource selection range shown in fig. 1.

Alternatively, the minimum time interval may be configured by the network device through RRC signaling, or specified by a communication standard, which is not limited by the embodiments of the present application.

Alternatively, the first terminal device may be configured to transmit (i.e., t ₀ ) Start-up determination The N resources are defined.

Optionally, the first terminal device may determine the LBT duration corresponding to each transmission requirement by:

the first terminal equipment can generate corresponding random numbers according to each transmission requirement respectively; and then the first terminal equipment can respectively determine the LBT duration corresponding to each transmission requirement according to the random number corresponding to each transmission requirement. Taking the nth transmission requirement as an example, a random number corresponding to the nth transmission requirement generated by the first terminal device is recorded as R _n The first terminal device can then respond to the random number R corresponding to the nth transmission requirement _n And determining the LBT duration corresponding to the nth transmission requirement. For example, the LBT duration corresponding to the nth transmission requirement is equal to t _sensing *R _n Or t _sensing *R _n + defer duration. Wherein N is a positive integer, N is more than or equal to 1 and less than or equal to N, t _sensing To perceive the duration of the time slot.

The first terminal device may determine the resources corresponding to the transmission requirements according to the LBT duration corresponding to each transmission requirement, as shown in fig. 5. Continuing with the nth transmission requirement as an example. The first terminal device may determine a start time of a resource selection range of the nth transmission requirement according to the LBT duration corresponding to the nth transmission requirement; and then determining the resource corresponding to the nth transmission requirement according to the starting time of the resource selection range of the nth transmission requirement. In fig. 5, a start time 1, a start time 2, and a start time 3 are respectively the start time of the resource selection range of the 1 st transmission request and the start time of the resource selection range of the 2 nd transmission request; the resource selection range 1, the resource selection range 2 and the resource selection range 3 are respectively the resource selection range of the 1 st transmission requirement, the resource selection range of the 2 nd transmission requirement and the resource selection range of the 3 rd transmission requirement.

Alternatively, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement through the method 1 of step A1 in the embodiment shown in fig. 3, and the specific process may refer to the above description of the method 1, which is not repeated here. Thus, T in FIG. 5 ₁ 、T ₂ 、T ₃ Respectively conform to the relation T in the mode 1 _n Is a formula of (2).

Exemplary, assume that a first terminal device is at t ₀ 3 transmission requirements occur. The first terminal device generates a corresponding random number for each transmission requirement. According to the random number and the time length of the sensing time slot, the LBT time lengths corresponding to the 3 transmission requirements are determined to be 1ms,4ms and 7ms respectively. The first terminal device may then reserve resources for each transmission need according to the order of the LBT duration from small to large or from large to small, respectively.

The first terminal device determines the resources corresponding to each transmission requirement according to the starting time of the resource selection range of each transmission requirement, and the specific process may refer to any one of the first to third modes in step A2 of the embodiment shown in fig. 3, or may be implemented by any one of the first to fourth modes in step A2. The resources corresponding to the 3 transmission requirements are shown in fig. 4. In fig. 4, LBT duration 1, LBT duration 2, and LBT duration 3 are respectively the LBT duration corresponding to the 1 st transmission requirement, the LBT duration corresponding to the 2 nd transmission requirement, and the LBT duration corresponding to the 3 rd transmission requirement; starting time 1, starting time 2 and starting time 3 are respectively the starting time of the resource selection range of the 1 st transmission requirement and the starting time of the resource selection range of the 2 nd transmission requirement, and the starting time of the resource selection range of the 3 rd transmission requirement; the resource 1, the resource 2 and the resource 3 are respectively the resource corresponding to the 1 st transmission requirement, the resource corresponding to the 2 nd transmission requirement and the resource corresponding to the 3 rd transmission requirement.

The following is a description of the steps according to the PHY layer and the MAC layer of the first terminal device.

The PHY layer determines the starting time of the resource selection range of each transmission requirement according to the LBT duration corresponding to each transmission requirement in the 3 transmission requirements.

In a first implementation, the PHY layer sends a start time of a resource selection range for each of the 3 transmission requirements to the MAC layer; the MAC layer determines the resource selection range of each transmission requirement according to the starting time of the resource selection range of each transmission requirement in the 3 transmission requirements; and the MAC layer respectively determines the resources corresponding to each transmission requirement in the resource selection range of each transmission requirement.

In a second implementation, the PHY layer determines a resource selection range of each transmission requirement according to a start time of the resource selection range of each transmission requirement in the 3 transmission requirements, respectively; the PHY layer sends the resource selection range of each transmission requirement to the MAC layer; and the MAC layer respectively determines the resources corresponding to each transmission requirement in the resource selection range of each transmission requirement.

Optionally, in the first implementation manner and the second implementation manner, the MAC layer may determine, first, a resource corresponding to the 3 rd transmission requirement according to a sequence from back to front of the time domain position; then determining the resource corresponding to the 2 nd transmission requirement under the requirement of meeting the minimum time interval; and finally, determining the resource corresponding to the 1 st transmission requirement under the requirement of meeting the minimum time interval.

Optionally, the MAC layer may determine, according to the order from the small to the large of the resource selection ranges, the resource corresponding to the transmission requirement with the smallest resource selection range; then determining the resource corresponding to the transmission requirement with the next smallest resource selection range under the requirement of meeting the minimum time interval; and ending the process until the resource corresponding to the transmission requirement with the largest resource selection range is determined.

In a third implementation, the PHY layer determines a start time unit of the resource selection range of each transmission requirement according to the start time of the resource selection range of each transmission requirement of the 3 transmission requirements, respectively. The PHY layer sends a start time unit (denoted as SA) of the resource selection range for each transmission requirement to the MAC layer. And the MAC layer determines the resources corresponding to each transmission requirement in the resource candidate set SA according to the resource selection range starting time unit of each transmission requirement.

Alternatively, the MAC layer may determine the resources corresponding to each transmission need in the SA, but not limited to, by the following manner.

Mode a: the MAC layer selects one resource combination (3 resources) in the SA, decides if the resource combination does not meet the requirement, and reselects until a combination meeting the requirement is selected. Wherein, the requirements are: a start time unit of a resource (denoted as resource 1) corresponding to the 1 st transmission requirement not earlier than a resource selection range of the 1 st transmission requirement; a start time unit of a resource (denoted as resource 2) corresponding to the 2 nd transmission requirement not earlier than a resource selection range of the 2 nd transmission requirement; a start time unit of a resource (denoted as resource 3) corresponding to the 3 rd transmission requirement not earlier than a resource selection range of the 3 rd transmission requirement; and a minimum time interval is guaranteed between resource 1 and resource 2, and a minimum time interval is guaranteed between resource 2 and resource 3. The resources of the 3 transmission requirements are ordered according to the sequence of the time domain positions, namely, the resource 1 is earlier than the resource 2, and the resource 2 is earlier than the resource 3.

Mode b: the MAC layer sequentially selects 3 resources in order of time domain positions from back to front or starts to select from the resource with the smallest time domain range. As shown in fig. 6, the MAC layer may select resource 3 of the start time unit of the resource selection range not earlier than the 3 rd transmission requirement in the SA; after selecting resource 3, selecting resource 2 of the starting time unit of the resource selection range not earlier than the 2 nd transmission requirement in SA under the condition of meeting the minimum time interval requirement; finally, in case the minimum time interval requirement is met, resource 1 of the starting time unit of the resource selection range not earlier than the 1 st transmission requirement is selected in the SA.

In other words, the MAC layer subtracts the minimum time interval from the determined time domain position of the resource 3 to obtain a selection range of the resource 2, where the start time of the selection range is the start time unit of the resource selection range of the 2 nd transmission requirement, and the end time is the time domain position of the resource 3 minus the time domain position of the minimum time interval; and selecting resource 2 in SA within the selection range; then, the selection range of the resource 1 is obtained continuously according to the above manner, and the resource 1 is selected in the selection range.

In a fourth implementation, the PHY layer determines a candidate set of resources for each transmission requirement according to a start time of a resource selection range for each of the 3 transmission requirements, respectively. The 1 st candidate resource set for transmission needs is denoted as SA1, the 2 nd candidate resource set for transmission needs is denoted as SA2, and the 3 rd candidate resource set for transmission needs is denoted as SA3. The PHY layer sends the MAC layer a candidate set of resources { SA1, SA2, SA3, }, for each transmission need. And the MAC layer determines the resources corresponding to each transmission requirement in the candidate resource set of each transmission requirement.

In this implementation, the MAC layer may select resource 1 at SA1, resource 2 at SA2, and resource 3 at SA3, with a minimum time interval guaranteed between resource 1 and resource 2, and a minimum time interval guaranteed between resource 2 and resource 3.

In other words, the MAC layer may select resource 3 in SA 3; screening candidate resources meeting the requirement of at least ensuring the minimum time interval with the resource 3 in the SA2 under the condition of meeting the minimum time interval, and selecting a resource 2 from the candidate resources screened from the SA 2; and continuing to screen candidate resources which meet the requirement of at least ensuring the minimum time interval with the resource 2 in the SA1 under the condition of meeting the minimum time interval, and selecting the resource 1 from the candidate resources screened in the SA 1.

Embodiment two:

in the process of determining the resources corresponding to the N transmission requirements, the first terminal device determines the resources corresponding to the transmission requirements according to the LBT duration corresponding to each transmission requirement and the resources corresponding to the previous transmission requirement of the transmission requirement, as shown in fig. 7. Wherein, the requirement of minimum time interval is satisfied between any two resources.

Alternatively, the first terminal device may be configured to transmit (i.e., t ₀ ) The determination of the N resources begins.

The resource selection range of each transmission requirement can be determined according to the LBT duration corresponding to the transmission requirement and the resources occupied by the previous transmission requirement of the transmission requirement. The prior transmission requirement may be the same Transport Block (TB) as the current resource, and/or transmission of other TBs occupies the resource. Illustratively, the preceding transmission requirements of the 3 rd transmission requirement are the 1 st transmission requirement and the 2 nd transmission requirement.

The principle provided for implementing the second embodiment is described below: when the resource 1 arrives, the first terminal equipment does not transmit on the resource 1 because the LBT duration corresponding to the resource 1 is not ended and the channel is busy; another possibility is that the LBT duration corresponding to resource 1 ends before resource 1 arrives, and the first terminal device transmits on resource 1. In the second possibility, since there is a data transmission on resource 1 and thus the channel is busy, the counter for LBT for resource 2 will not continue to drop because the channel is occupied. In summary, for the LBT procedure performed by the first terminal device for the resources 2 and 3, the time domain resources of the resource 1 are all in a busy channel state, so when determining the resource selection ranges of the 2 nd transmission requirement and the 3 rd transmission requirement, the terminal device needs to exclude the time domain position occupied by the resource 1. Similarly, the time domain location occupied by resource 2 affects the resource selection range of the 3 rd transmission requirement.

Continuing with the nth transmission requirement as an example. Based on the above principle, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement according to the LBT duration corresponding to the nth transmission requirement and the resource corresponding to the previous transmission requirement of the nth transmission requirement; and then determining the resource corresponding to the nth transmission requirement according to the starting time of the resource selection range of the nth transmission requirement.

Alternatively, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement through the method 2 of the step A1 in the embodiment shown in fig. 3, and the specific process may refer to the above description of the method 2, which is not repeated herein. Continuing with the example of 3 transmission requirements, T in FIG. 7 ₁ 、T ₂ 、T ₃ Respectively conform to the relation T in the mode 2 _n Is a formula of (2). The resource selection range for each transmission requirement may be as shown in fig. 8.

In addition, the first terminal device determines the resource corresponding to each transmission requirement according to the starting time of the resource selection range of each transmission requirement, and the specific process may refer to any one of the first to third modes in step A2 of the embodiment shown in fig. 3, or may be implemented by any one of the first to fourth modes in step A2. The process may also be described with reference to implementation one, and will not be described in detail here.

Embodiment III:

on the basis of implementation two, in the process of determining the resources corresponding to the N transmission requirements, the first terminal device determines the resources corresponding to the transmission requirements according to the LBT duration corresponding to each transmission requirement and the resources corresponding to the previous transmission requirement of the transmission requirement, the resources corresponding to the previous HARQ of the transmission requirement, as shown in fig. 9. Wherein, the requirement of minimum time interval is satisfied between any two resources.

The resource selection range of each transmission requirement can be determined according to the LBT duration corresponding to the transmission requirement, the resources occupied by the previous transmission requirement of the transmission requirement, and the resources occupied by the previous HARQ of the transmission requirement. The prior transmission requirement may be the same Transport Block (TB) as the current resource, and/or transmission of other TBs occupies the resource. Illustratively, the preceding transmission requirements of the 3 rd transmission requirement are the 1 st transmission requirement and the 2 nd transmission requirement.

The prior HARQ for each transmission requirement includes an acknowledgement response for the prior transmission requirement for that transmission requirement, and may also include at least one acknowledgement response for the first transmission; the first transmission is a transmission which is monitored by the first terminal equipment and does not receive the response. As shown in fig. 9, the 1 st transmission requirement prior HARQ may include HARQ of the first transmission of the other terminal device, and the 2 nd transmission requirement prior HARQ includes HARQ of the 1 st transmission requirement, and HARQ of the first transmission of the other terminal device. Thus, the prior acknowledgement response of the nth transmission requirement includes acknowledgement responses of the 1 st transmission requirement to the n-1 st transmission requirement, and acknowledgement responses of the first transmission.

Continuing with the nth transmission requirement as an example. Based on the above principle, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement according to the LBT duration corresponding to the nth transmission requirement, the resource corresponding to the previous transmission requirement of the nth transmission requirement, and the resource corresponding to the previous HARQ of the nth transmission requirement; and then determining the resource corresponding to the nth transmission requirement according to the starting time of the resource selection range of the nth transmission requirement.

Alternatively, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement through the mode 3 of step A1 in the embodiment shown in fig. 3, and the specific process may refer to the above description of the mode 3, which is not repeated here. Continuing with the example of 3 transmission requirements, T in FIG. 9 ₁ 、T ₂ 、T ₃ Respectively conform to the relation T in the mode 3 _n Is a formula of (2). The resource selection range for each transmission requirement may be as shown in fig. 10.

As shown in fig. 10, the resource selection range of the 1 st transmission requirement (corresponding to the resource 1) (i.e., the resource selection range 1 in fig. 10) excludes the LBT duration 1 and the extra delay caused by the resources occupied by the previous HARQ of the 1 st transmission requirement (i.e., the HARQ of the first transmission), and the start time of the resource selection range 1 is the start time 1; the resource selection range (i.e., the resource selection range 2 in fig. 10) of the 2 nd transmission requirement (corresponding to the resource 2) excludes the LBT duration 2, the resources occupied by the resource 1 and the resources occupied by the HARQ of the resource 1, and the extra delay caused by the resources occupied by the HARQ of the first transmission, and the starting time of the resource selection range 2 is the starting time 2; the resource selection range of the 3 rd transmission requirement (corresponding to the resource 3) (i.e. the resource selection range 3 in fig. 10) excludes the extra delay caused by LBT duration 3, the resources occupied by the resource 1 and the resources occupied by the HARQ of the resource 1, the resources occupied by the resource 2 and the resources occupied by the HARQ of the resource 2, and the resources occupied by the HARQ of the first transmission, and the start time of the resource selection range 3 is the start time 3.

Embodiment four:

after the first terminal device determines N resources through the above embodiments one to three, the first terminal device may transmit the demand on the N resources. At a first time (i.e. t ₁ ) And triggering to redetermine the resource corresponding to the nth transmission requirement when the LBT duration corresponding to the nth transmission requirement is not ended or the first time length is smaller than the LBT residual duration corresponding to the nth transmission requirement. The first time is located before the starting time of the resource corresponding to the nth transmission requirement, or the first time is the starting time of the resource corresponding to the nth transmission requirement; the first time length is a first time t ₁ A duration between start times of the resources corresponding to the nth transmission requirement.

As shown in fig. 11, in the case where the first transmission occurs in the first terminal device or the other terminal device before the resource 1 corresponding to the 1 st transmission requirement arrives, the LBT duration corresponding to the 1 st transmission requirement may not end before the start time of the resource 1 due to the channel occupation of the first transmission. In the fourth embodiment, the first terminal device may redetermine the resource corresponding to the nth transmission requirement according to the LBT remaining duration corresponding to the nth transmission requirement, as shown in fig. 11.

Optionally, the first terminal device may redetermine the start time of the resource selection range of the nth transmission requirement according to the LBT remaining duration corresponding to the nth transmission requirement, and further redetermine the resource corresponding to the nth transmission requirement according to the redetermined start time of the resource selection range of the nth transmission requirement, as shown in fig. 12.

Optionally, the first terminal device may determine the start time of the resource selection range of the nth transmission requirement by any one of the manners described in step S2 in the embodiment shown in fig. 3, and the specific process may refer to the description of step S2 above, which is not repeated here. Thus, T in FIG. 12 ₁ ' conform to T in step S2 _n ' formula.

In addition, the first terminal device may redetermine the resource corresponding to the nth transmission requirement according to the start time of the resource selection range of the redetermined nth transmission requirement, and the specific process may refer to any one of the first to third modes in step A2 of the embodiment shown in fig. 3, or may be implemented by any one of the first to fourth modes in step A2. The process may also be described with reference to implementation one, and will not be described in detail here.

It is considered that after the terminal device determines a plurality of resources, a problem may arise that the time interval between any two resources is smaller than the minimum time interval after a certain resource is redetermined. Therefore, in one embodiment, after the first terminal device triggers to redetermine the resource corresponding to the nth transmission requirement, the resource corresponding to the subsequent transmission requirement of the nth transmission requirement may be redetermined.

Referring to fig. 13, alternatively, when the time interval between the re-selected resource 1 and the resource 2 corresponding to the subsequent transmission requirement is smaller than the minimum time interval, the first terminal device may trigger the re-selection of the resource 2. In other words, resource 2 may not need to be reselected when the time interval between reselected resource 1 and resource 2 still meets the minimum time interval requirement.

Optionally, the first terminal device may redetermine the resource selection range 1 of the 1 st transmission requirement according to the LBT remaining duration corresponding to the 1 st transmission requirement (denoted as LBT remaining duration 1), and the time interval between the reselected resource 1 and the resource 2 is greater than or equal to the minimum time interval, and redetermine the resource 1 in the redetermined resource selection range 1. If the time interval between the reselected resource 1 and the resource 2 is greater than or equal to the minimum time interval in consideration of the LBT remaining duration 1, so that the redetermined resource selection range is empty, that is, the time obtained after adding the LBT remaining duration 1 and the minimum time interval to the current time is later than the start time of the resource 2, then the first terminal device needs to reselect the resource 1 and the resource 2. Optionally, the first terminal device may use the LBT remaining duration 1 (optionally, may further include an LBT remaining duration corresponding to the 2 nd transmission requirement (denoted as LBT remaining duration 2)), and redetermine the resource 1 and the resource 2, so as to ensure that the requirement of the minimum time interval between the resource 1 and the resource 2 is met.

Optionally, when the first terminal device triggers to redetermine the resource corresponding to the nth transmission requirement, the first terminal device (PHY layer) may further determine whether the resource corresponding to the subsequent transmission requirement of the nth transmission requirement needs to be redetermined, where the determining condition may refer to a condition one and a condition two described in the embodiment shown in fig. 3, which are not described herein again.

In this embodiment, the process of the first terminal device re-determining the resource corresponding to the subsequent transmission requirement of the nth transmission requirement may refer to the description of steps F1-F2 in the embodiment shown in fig. 3, which is not repeated here. In FIG. 14, T ₁ ' conform to T in step S2 _n ' formula, T ₂ ' conform to T in step S2 _n The ' formula or the ' formula ' corresponds to the formula in step F1 for T _k ' formula.

The present application further provides a resource allocation method based on the resource allocation method provided by the embodiment shown in fig. 3 and the method provided by the above-mentioned implementation one to the fourth embodiment.

In this method, the first terminal device may transmit a request for transmission (i.e., t ₀ ) By the method provided in the above embodiment, the start time of the resource selection range of the N transmission requirements is determined. If the start time of the resource selection range of each transmission requirement does not exceed the third time (denoted as t ₃ ) The first terminal device may continue to determine the resources corresponding to the N transmission requirements according to the start time of the resource selection range of the N transmission requirements. The process of determining the resources corresponding to the N transmission requirements by the first terminal device may refer to the corresponding description in the above embodiment, which is not described herein.

Wherein the third time t ₃ For the time t when a transmission need arises from the first terminal device ₀ The time after the third time period begins to elapse, wherein the value of the third time period is determined according to the data transmission delay of the first terminal equipment, and the third time period can be recorded as T _PDB . Thus t ₃ ＝t ₀ +T _PDB . Exemplary, T _PDB May be equal to or less than the data transmission delay.

The starting time of the resource selection range of each transmission requirement does not exceed the third time t ₃ Thus, when the first terminal device transmits data on the determined N resources, the time delay of the data can be ensured to be within the range of the data transmission time delay of the first terminal device.

In one embodiment, when there is a resource selection range in N transmission demands, the start time exceeds the third time t ₃ The first terminal device may terminate the resource allocation procedure in the above embodiment and select other resource allocation manners when at least one transmission requirement is met.

The following description will take the g-th transmission requirement of the N transmission requirements as an example. As shown in fig. 15, when the start time of the resource selection range of the g-th transmission requirement exceeds the third time t ₃ The first terminal device may, but is not limited to, implement data transmission by the following resource allocation method. Wherein g is a positive integer, and g is more than or equal to 1 and less than or equal to N. The start time g in fig. 15 is the start time of the resource selection range of the g-th transmission requirement.

Resource allocation mode one: the first terminal device may send a first resource request to the second terminal device; then, first resource configuration information from the second terminal device is received. The first resource configuration information is used for indicating that the transmission resource occupied by the first resource request of the resource allocated by the second terminal equipment for the first terminal equipment is pre-negotiated or agreed by the first terminal equipment and the second terminal equipment.

The first resource request may be carried in a short control message (short control message), for example. In this way, the second terminal device may share the remaining COT to the first terminal device after preempting the COT.

A second resource allocation mode: the first terminal device may send a second resource request to the network device; then, second resource configuration information is received from the network device. The second resource configuration information is used for indicating resources allocated by the network equipment for the first terminal equipment.

Alternatively, the second resource request may be a scheduling request (scheduling request, SR) or a buffer status report (buffer status report, BSR). In this way, the network device may share the remaining COT to the first terminal device after preempting the COT.

And a third resource allocation mode: the first terminal device may monitor the channel, and when the second terminal device transmits data, actively use the resource where the remaining COT of the second terminal device is located to transmit data.

The second terminal device is a receiving end of the N transmission requirements of the first terminal device.

In another embodiment, when the start time of the resource selection range of the W transmission demands does not exceed the third time among the N transmission demands, the start time of the resource selection range of the remaining transmission demands exceeds the third time, as shown in fig. 16. Optionally, the first terminal device may further determine the resource corresponding to the W transmission requirements according to the start time of the resource selection range of the W transmission requirements. The process of determining the resources corresponding to the W transmission requirements by the first terminal device may refer to the corresponding description in the above embodiment, which is not described herein. Wherein W is a positive integer less than N.

The start time W in fig. 16 is the start time of the resource selection range of any one of the W transmission requirements; the start time g is the start time of the resource selection range of any one of the N transmission requirements except the W transmission requirements.

After the first terminal device transmits data on the resource corresponding to the W transmission requirements, according to the transmission result indicated by the response of the W transmission requirements, judging whether to continue to transmit data on the resource where the remaining COT of the second terminal device or the network device is located. When the transmission result indicated by the response responses of the W transmission requirements indicates that the data transmission is successful, the first terminal equipment does not need to seek other resource allocation modes; and when the transmission result indicated by the response responses of the W transmission requirements indicates that the data transmission fails, the first terminal device may continue to transmit data by adopting any one of the above-mentioned resource allocation manners.

It should be noted that the same or similar terms/parameters as those in fig. 4 to 16 may be referred to each other, and will not be separately described in the corresponding description.

In the communication field, the number of RBs occupied by bands of different bandwidths is different, as shown in table 1.

TABLE 1 configuration of RB number occupied by bands of different bandwidths

The bandwidths of the unlicensed spectrum commonly used include 20MHz, 40MHz, 60MHz and 80MHz. As shown in table 1, when scs=30 kHz, the number of RBs occupied by the bandwidth band is 51, 106, 162, 217, respectively. Obviously, although the bandwidth of 40MHz is twice that of 20MHz, the number of RBs occupied by 40MHz is 106, exceeding twice that of 20MHz (i.e. 102 of 51 x 2). Thus, an RB in a band of 40MHz bandwidth cannot be directly called as an RB in 2 bands of 20MHz bandwidth.

In addition, in unlicensed spectrum, 10MHz and 20MHz transmissions do not require guard bands (guard bands), while larger bandwidth transmissions do require guard bandwidths. The present standard provides a guard band setting scheme in bands of different bandwidths, as shown in table 2.

TABLE 2

In order to solve the problem of misalignment of the number of frequency band RBs of different bandwidths, the embodiment of the application provides a communication method. By this method, the communication device can realize resource mapping between the frequency bands of two different bandwidths. The method can solve the problem of RB number alignment under different bandwidths, and is convenient for realizing resource mapping on a frequency domain. The method may be applicable to SL-U scenarios. The method provided in the application embodiment is described below with reference to the flowchart shown in fig. 17.

S1701: the terminal device selects a first resource in a first frequency band.

S1702: the terminal device transmits the target data on a second resource of a second frequency band.

Wherein the bandwidth of the first frequency band is greater than the bandwidth of the second frequency band, or the bandwidth of the first frequency band is less than the bandwidth of the second frequency band; a resource mapping relation exists between the frequency domain position of the first resource and the frequency domain position of the second resource; the resource mapping relationship is used for mapping the first resource to the second resource.

Optionally, in the SL-U system, if the terminal device reserves the first resource in the first frequency band for transmitting the target data, and subsequently preempting the channel of the second frequency band through the LBT, then the terminal device may map the first resource to the second frequency band to obtain the second resource through the above method, so that the target data may be transmitted in the preempted channel.

It should be noted that there is an intersection between the frequency range of the first frequency band and the frequency range of the second frequency band.

Before S1702, the terminal device may select the second resource in the second frequency band according to the resource mapping relationship and the frequency domain position of the first resource.

Wherein the first resource comprises a first RB and the second resource comprises a second RB. The frequency domain location of the first resource includes an RB number of the first RB in the first frequency band; the frequency domain location of the second resource includes an RB number of the second RB in the second frequency band. The resource mapping relationship is used for representing a mapping relationship between the RB numbers in the first frequency band and the RB numbers in the second frequency band.

In one embodiment, the resource mapping relationship will be described by taking the case where the bandwidth of the second frequency band is larger than the bandwidth of the first frequency band. The first frequency band comprises L1 RBs, wherein L1 is a positive integer; the bandwidth of the first frequency band is B1, and the bandwidth of the second frequency band is B2, b2=x×b1, X >1.

Optionally, when X is an integer, the second frequency band includes X frequency sub-bands, a bandwidth of each frequency sub-band is B1, and the first frequency band is located in a y-th frequency sub-band in the X frequency sub-bands, where y is greater than or equal to 1 and less than or equal to X, and y is an integer.

In the resource mapping relationship, the RB number a in the first frequency band corresponds to the RB number (y-1) l1+c+a in the second frequency band; wherein a is an integer, 0.ltoreq.a < L1, and C is a constant; or alternatively

In the resource mapping relationship, the RB number L1-b in the first frequency band corresponds to the RB number y×l1+d-b in the second frequency band; wherein b is an integer, 0<b is less than or equal to L1, and D is a constant.

In another embodiment, the resource mapping relationship will be described by taking the case where the bandwidth of the first frequency band is larger than the bandwidth of the second frequency band. The second frequency band comprises L2 RBs, wherein L2 is a positive integer; the bandwidth of the first frequency band is B1, and the bandwidth of the second frequency band is B2, b1=x×b2, X >1.

Optionally, when X is an integer, the first frequency band includes X frequency sub-bands, a bandwidth of each frequency sub-band is B2, and the second frequency band is located in a y-th frequency sub-band in the X frequency sub-bands, where y is greater than or equal to 1 and less than or equal to X, and y is an integer.

In the resource mapping relationship, the RB number a in the second frequency band corresponds to the RB number (y-1) l2+c+a in the first frequency band; wherein a is an integer, 0.ltoreq.a2 < L2, and C is a constant; or alternatively

In the resource mapping relationship, the RB number L2-b in the second frequency band corresponds to the RB number y×l2+d-b in the first frequency band; wherein b is an integer, 0<b is less than or equal to L2, and D is a constant.

In the above two embodiments, the values of C and D relate to the bandwidths of the first and second frequency bands. As is clear from tables 1 and 2, since the number of RBs included in the frequency bands of different bandwidths and the distribution of guard bands are fixed, the above-described resource mapping relationship is also determined for the two frequency bands of fixed bandwidths, and specific values of C and D are related to the number of RBs included in the two frequency bands and the distribution of guard bands.

In the embodiment of the present application, in order to transmit the target data, the terminal device may further perform the following steps:

p1: determining a first target sub-channel in a plurality of first sub-channels corresponding to the first frequency band according to the frequency domain position of the first resource;

p2: determining a second target sub-channel in a plurality of second sub-channels corresponding to the second frequency band according to the frequency domain position of the second resource;

p3: when the number of RBs occupied by the second target sub-channel is larger than that occupied by the first target sub-channel, performing rate matching on the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal; or when the number of RBs occupied by the second target sub-channel is smaller than that occupied by the first target sub-channel, punching the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal;

the coded signal is obtained by coding the target data according to the number of RBs occupied by the first target sub-channel.

Through the steps, the terminal equipment can also realize the mapping of the sub-channels corresponding to different frequency bands.

Based on the target data obtained by the terminal equipment through the P1-P3, the terminal equipment can send the target signal on the second target sub-channel, so that the transmission of the target data is realized.

In addition, through the resource mapping relation, the terminal equipment can map the resources selected by other terminal equipment into the frequency band accessed by the terminal equipment when selecting the resources, so that the selection of the resources can be avoided, and the mutual interference between the transmission of the terminal equipment and other terminal equipment is avoided.

For example, in the SL-U system, the first terminal device accesses and reserves 10 RBs of RB 0 to RB 9 using the first band of 20MHz bandwidth. When the second terminal equipment adopts the second frequency band with the bandwidth of 40MHz to access and select resources, the RB numbers selected by the first terminal equipment can be determined in the RBs occupied by the second frequency band through the resource mapping relation between the first frequency band and the second frequency band, and the RBs with the RB numbers are prevented from being selected.

The resource mapping relationship between the 20MHz bandwidth band, the 40MHz bandwidth band, the 60MHz bandwidth band, and the 80MHz bandwidth band is exemplarily described below with scs=30 kHz. Referring to fig. 18, a distribution diagram of 4 bands of 20MHz and 2 bands of 40MHz in a band of 80MHz is shown.

Example 1: within each 20MHz band, 51 RBs are numbered from 0 to 50, with frequencies from low to high. In each 40MHz band, 106 RBs are numbered from 0 to 105, with frequencies ranging from low to high.

The resource mapping relationship between 106 RBs in band 5 of 40MHz and 51 RBs in band 1 of 20MHz and 51 RBs in band 2 of 20MHz is as follows:

RB0 in band 5 corresponds to RB0 in band 1 (i.e., lowest numbered RB is aligned); RB1 in band 5 corresponds to RB1 in band 1; and so on until RB50 in band 5 corresponds to RB50 in band 1;

there is no correspondence between the 4 RBs (RB 51-RB 54) following RB50 in band 5;

RB55 in band 5 corresponds to RB0 in band 2; RB56 in band 5 corresponds to RB1 in band 2; and so on until RB105 in band 5 corresponds to RB50 in band 2 (i.e., the highest numbered RB is aligned).

Example 2: within each 20MHz band, 51 RBs are numbered from 0 to 50, with frequencies from low to high. Within each 60MHz band, 162 RBs are numbered from 0 to 161, with frequencies ranging from low to high.

The resource mapping relationship between the RBs in band 7 and the RBs in band 1, band 2, and band 3 is similar, namely:

RB0 in band 7 corresponds to RB0 in band 1 (i.e., lowest numbered RB is aligned); RB1 in band 7 corresponds to RB1 in band 1; and so on until RB50 in band 7 corresponds to RB50 in band 1;

There is no correspondence between the 4 RBs (RB 51-RB 54) following RB50 in band 7;

RB55 in band 7 corresponds to RB0 in band 2; RB56 in band 7 corresponds to RB1 in band 2; and so on until RB105 in band 7 corresponds to RB50 in band 1;

there is no correspondence between the 5 RBs (RB 106-RB 110) following RB105 in band 7;

RB111 in band 7 corresponds to RB0 in band 3; RB112 in band 7 corresponds to RB1 in band 3; and so on until RB161 in band 7 corresponds to RB50 in band 3 (i.e., the highest numbered RBs are aligned).

Example 3: within each 20MHz band, 51 RBs are numbered from 0 to 50, with frequencies from low to high. In the 80MHz band, 217 RBs are numbered from 0 to 216, with frequencies ranging from low to high.

The resource mapping relationship between the RBs in band 9 and the RBs in band 1, band 2, band 3, and band 4 is similar, namely:

RB0 in band 9 corresponds to RB0 in band 1 (i.e., lowest numbered RB is aligned); RB1 in band 9 corresponds to RB1 in band 1; and so on until RB50 in band 9 corresponds to RB50 in band 1;

there is no correspondence between the 4 RBs (RB 51-RB 54) following RB50 in band 9;

RB55 in band 9 corresponds to RB0 in band 2; RB56 in band 9 corresponds to RB1 in band 2; and so on until RB105 in band 5 corresponds to RB50 in band 1;

there is no correspondence between the 5 RBs (RB 106-RB 110) following RB105 in band 9;

RB111 in band 9 corresponds to RB0 in band 3; RB112 in band 9 corresponds to RB1 in band 3; and so on until RB161 in band 9 corresponds to RB50 in band 3;

there is no correspondence between the 4 RBs (RB 162-RB 164) following RB161 in band 9;

RB165 in band 9 corresponds to RB0 in band 4; RB166 in band 9 corresponds to RB1 in band 4; and so on until RB216 in band 9 corresponds to RB50 in band 4 (i.e., the highest numbered RB is aligned).

Note also that, in the frequency bands 1 to 9 shown in fig. 18, the resource mapping relationship between RBs in different frequency bands may be referred to the above example.

It should be noted that the above examples 1 to 3 are taken as examples, and do not constitute any limitation on the resource mapping relationship provided in the embodiments of the present application. The above example also does not limit the number of RBs whose correspondence relationship does not exist at any place in a band having a large bandwidth. For example, in the first resource mapping relationship, after the RB0-RB50 in the band 9 corresponds to the RB0-RB50 in the band 1, there is no correspondence relationship among 1 RB, 2 RBs, 3 RBs, 4 RBs, 5 RBs, or 6 RBs after the RB50 in the band 9; from RB52, RB53, RB54, RB55, RB56, or RB57 of band 9, continue to correspond to RB in band 2; similarly, after 51 RBs consecutively in the band 9 are in one-to-one correspondence with 51 RBs in the band 2, there is no correspondence between 1 RB, 2 RBs, 3 RBs, 4 RBs, 5 RBs, or 6 RBs after the RBs corresponding to the RB50 in the band 2 in the band 9.

In addition, after the terminal device performs resource mapping according to the resource mapping relationship, the corresponding relationship of the transmission also needs to be mapped. For example, taking 10 RBs in the band as one subchannel, 51 RBs in the 20MHz band may constitute 5 subchannels, occupying RB 0-RB 9, RB 10-RB 19, RB 20-RB 29, RB 30-RB 39, and RB 40-RB 50, respectively. The 20MHz band containing resources described above may correspond to the following 5 subchannels in the 40MHz/60MHz/80MHz band: occupies RB0 to RB9, RB10 to RB19, RB20 to RB29, RB30 to RB39, RB40 to RB55 or RB50 to RB53 (the number of RBs occupied by a certain sub-channel can be greater than 11).

Obviously, since the number of RBs in the 40Mhz band is greater than the sum of the numbers of RBs contained in the 2 20Mhz bands, the 5 th sub-channel in the 40Mhz band is different from the number of RBs occupied by the 5 th sub-channel in the 20Mhz band. Therefore, the terminal device needs to consider the problem caused by the difference in the number of RBs when mapping between the 5 th sub-channel in the 40Mhz band and the 5 th sub-channel in the 20Mhz band.

Example 1: the 5 th sub-channel (hereinafter abbreviated as a first sub-channel) of the 20MHz band is mapped to the 5 th sub-channel (hereinafter abbreviated as a second sub-channel) of the 40MHz band. And the terminal equipment encodes the target data to be transmitted according to the number of RBs occupied by the first sub-channel to obtain an encoded signal. Because the number of RBs occupied by the second sub-channel is greater than that occupied by the first sub-channel, more resources occupied by the terminal equipment are transmitted, so that the coded signal needs to be subjected to rate matching according to the number of RBs occupied by the second sub-channel, and a target signal is obtained. And finally, the terminal equipment transmits the target signal on the second sub-channel.

Example 2: the 5 th sub-channel (hereinafter abbreviated as a first sub-channel) of the 80MHz band is mapped to the 5 th sub-channel (hereinafter abbreviated as a second sub-channel) of the 20MHz band. The number of RBs occupied by the first sub-channel may be 14, 16, or other number greater than 11. And the number of RBs occupied by the second sub-channel is 11. And the terminal equipment encodes the target data to be transmitted according to the number of RBs occupied by the first sub-channel to obtain an encoded signal. Because the number of RBs occupied by the second sub-channel is smaller than that occupied by the first sub-channel, the terminal equipment is required to punch the coded signal according to the number of RBs occupied by the second sub-channel, and discard part of the signals to obtain the target signal. And finally, the terminal equipment transmits the target signal on the second sub-channel.

It should be further noted that, each step in the foregoing embodiments may be performed by a corresponding device, or may be performed by a component such as a chip, a processor, or a chip system in the device, which is not limited by the embodiment of the present application. The above embodiments are described only as examples to be executed by the respective apparatuses. Furthermore, the specific implementations or examples in the above embodiments are not limited to the arrangements provided in the embodiments of the present application.

In the above embodiments, some steps may be selected and performed, and the order of steps in the drawings may be adjusted and performed, which is not limited in this application. It should be understood that it is within the scope of the present application to perform some of the steps in the illustrations, adjust the order of the steps, or implement the steps in combination with each other.

It will be appreciated that, in order to implement the functions of the above embodiments, each device involved in the above embodiments includes a corresponding hardware structure and/or software module for performing each function. Those of skill in the art will readily appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

It can be understood that the above network architecture and application scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present invention, and are not limited to the technical solution provided by the embodiments of the present invention, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of new services, the technical solution provided by the embodiments of the present invention is equally applicable to similar technical problems.

Note that: the "step" in the embodiments of the present application is merely illustrative, and is used to better understand a performance method adopted by the embodiments, and does not essentially limit the implementation of the aspects of the present application, for example: this "step" may also be understood as a "feature". In addition, the execution sequence of the steps does not form any limitation, and any operations such as step sequence change or step combination or step splitting which do not affect the implementation of the overall scheme are made on the basis, so that the formed new technical scheme is also within the scope of the disclosure of the application.

Based on the same technical idea, the application also provides a communication device which can be applied to terminal equipment in a SL-U system. The communication device is used for realizing the method provided by each embodiment. Referring to fig. 19, a communication device 1900 includes a communication unit 1901 and a processing unit 1902.

The communication unit 1901 is configured to receive and transmit signals. Optionally, a transceiver may be included in the communication unit 1901.

In one implementation, the communication apparatus 1900 is applied to the first terminal device in the embodiment shown in fig. 3, or any one of the embodiments one to four. The processing unit 1902 is configured to perform the following steps:

Acquiring Listen Before Talk (LBT) time lengths corresponding to N transmission requirements; wherein N is an integer greater than or equal to 1;

determining N resources according to LBT duration corresponding to the N transmission requirements; the N resources are in one-to-one correspondence with the N transmission requirements, and when N is an integer greater than 1, a time interval between any two resources is greater than or equal to a minimum time interval.

Optionally, the processing unit 1902 is specifically configured to:

determining an nth starting time according to the LBT duration corresponding to the nth transmission requirement; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N; the nth start time is the start time of the resource selection range of the nth transmission requirement;

and determining the resource corresponding to the nth transmission requirement according to the nth starting time.

Alternatively, the processing unit 1902 may include, but is not limited to, a PHY layer processing unit and a MAC layer processing unit.

Optionally, the PHY layer processing unit is specifically configured to determine the nth starting time according to an LBT duration corresponding to the nth transmission requirement.

Optionally, the PHY layer processing unit is further configured to send the nth start time to the MAC layer processing unit;

The MAC layer processing unit is specifically configured to determine, according to the nth start time, a resource selection range of the nth transmission requirement; and determining the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement.

Optionally, the PHY layer processing unit is further configured to determine, according to the nth start time, a resource selection range of the nth transmission requirement; and sending the resource selection range of the nth transmission requirement to the MAC layer processing unit;

the MAC layer processing unit is specifically configured to determine, in a resource selection range of the nth transmission requirement, a resource corresponding to the nth transmission requirement.

Optionally, the PHY layer processing unit is further configured to determine, according to the nth start time, a start time unit of a resource selection range of the nth transmission requirement; and sending a starting time unit of the resource selection range of the nth transmission requirement and a candidate resource set to the MAC layer processing unit;

the MAC layer processing unit is specifically configured to determine, in the resource candidate set, a resource corresponding to the nth transmission requirement according to a resource selection range start time unit of the nth transmission requirement.

Optionally, the PHY layer processing unit is further configured to determine, according to the nth start time, a candidate resource set of the nth transmission requirement; and sending the candidate resource set of the nth transmission requirement to the MAC layer processing unit;

the MAC layer processing unit is specifically configured to determine, in the candidate resource set of the nth transmission requirement, a resource corresponding to the nth transmission requirement.

Wherein any candidate resource set contains at least one candidate resource.

Optionally, the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n The following formula is satisfied:

or alternatively

Optionally, the processing unit 1902 is specifically configured to:

or alternatively

Or alternatively

Optionally, the processing unit 1902 is specifically configured to:

determining the nth starting time according to the LBT duration corresponding to the nth transmission requirement, the resource corresponding to the prior transmission requirement of the nth transmission requirement and the resource corresponding to the prior response of the nth transmission requirement;

wherein the preceding transmission requirement of the nth transmission requirement is a transmission requirement that a resource position is located before the N transmission requirements in the N transmission requirements; the prior acknowledgement response of the nth transmission requirement includes an acknowledgement response that should be received by the first terminal device or other terminal devices before the resource corresponding to the nth transmission requirement.

Optionally, the previous reply response of the nth transmission requirement includes a reply response of the previous transmission requirement of the nth transmission requirement; or alternatively

The prior acknowledgement response of the nth transmission requirement includes an acknowledgement response of the prior transmission requirement of the nth transmission requirement and at least one acknowledgement response of the first transmission; the first transmission is a transmission which is monitored by the first terminal equipment and does not receive a response.

or alternatively

Or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value; t is t _cpe A duration extending for the cyclic prefix; t is t _i,R For the duration of the resource corresponding to the ith preceding transmission requirement of said nth transmission requirement,a sum of time durations of resources corresponding to n-1 prior transmission demands of the nth transmission demand; t is t _n,HARQ The total duration of the resources corresponding to the prior response of the nth transmission requirement is set; s is S _i,R The number of time units occupied by the resource corresponding to the ith preceding transmission need of said nth transmission need,/- >The sum of the number of time units occupied by the resources corresponding to the n-1 prior transmission requirements of the nth transmission requirement; s is S _n,HARQ And the total number of time units occupied by the resources corresponding to the prior response of the nth transmission requirement.

Optionally, the processing unit 1902 is further configured to:

in the process of transmitting data on the N resources through the communication unit 1901, it is determined that the LBT duration corresponding to the nth transmission requirement is not ended;

re-determining an nth starting time according to the LBT residual time length corresponding to the nth transmission requirement;

and re-determining the resource corresponding to the nth transmission requirement according to the re-determined nth starting time.

Optionally, determining that the LBT duration corresponding to the nth transmission requirement is not ended includes at least one of:

the first time is located before the starting time of the resource corresponding to the nth transmission requirement, or the first time is the starting time of the resource corresponding to the nth transmission requirement; the first duration is a duration between the first time and a start time of a resource corresponding to the nth transmission requirement.

Optionally, the processing unit 1902 is further configured to:

before data is transmitted on the N resources through the communication unit 1901, determining a kth start time according to an LBT duration corresponding to a kth transmission requirement; the kth transmission requirement is a subsequent transmission requirement of the nth transmission requirement, k is a positive integer, and N < k is less than or equal to N; the kth starting time is the starting time of the resource selection range of the kth transmission requirement; determining a resource corresponding to the kth transmission requirement according to the kth starting time;

after determining that the LBT duration corresponding to the nth transmission requirement is not ended, re-determining the kth starting time according to the LBT residual duration corresponding to the kth transmission requirement; or re-determining the kth starting time according to the LBT residual time length corresponding to the nth transmission requirement and the minimum time interval;

re-determining the resource corresponding to the kth transmission requirement according to the re-determined kth starting time; wherein the time interval between any two of the re-determined resources is greater than or equal to the minimum time interval.

Optionally, the processing unit 1902 is further configured to:

after determining that the LBT duration corresponding to the nth transmission requirement is not ended, determining that the second duration is smaller than the remaining LBT duration corresponding to the kth transmission requirement; or determining that a second time after the second duration from the first time is later than the starting time of the resource corresponding to the kth transmission requirement; wherein the second duration is the sum of the LBT remaining duration corresponding to the nth transmission requirement and (k-n) minimum time intervals; the first time is the time when the LBT duration corresponding to the nth transmission requirement is not ended;

re-determining a kth starting time according to the LBT residual time length corresponding to the kth transmission requirement; or re-determining the kth starting time according to the LBT residual time length corresponding to the nth transmission requirement and the minimum time interval;

Optionally, the processing unit 1902 is specifically configured to:

determining N starting times according to LBT durations corresponding to the N transmission requirements; the jth initial time in the N initial times is the initial time of the resource selection range of the jth transmission requirement in the N transmission requirements;

when the N starting times do not exceed the third time, determining resources corresponding to the nth transmission requirement according to the nth starting time;

the third time is a time after a third duration from the time when the transmission requirement occurs in the first terminal device, and the value of the third duration is determined according to the data transmission delay of the first terminal device.

Optionally, the processing unit 1902 is further configured to:

when the g-th start time exceeds the third time, transmitting a first resource request to a second terminal device through the communication unit 1901; receiving, by the communication unit 1901, first resource configuration information from the second terminal device; the first resource configuration information is used for indicating the resources allocated by the second terminal equipment for the first terminal equipment, the second terminal equipment is a receiving end of the N transmission requirements, and the transmission resources occupied by the first resource request are pre-negotiated or agreed by the first terminal equipment and the second terminal equipment; or alternatively

When the g-th start time exceeds the third time, sending a second resource request to the network device through the communication unit 1901; receiving, by the communication unit 1901, second resource configuration information from the network device; the second resource configuration information is used for indicating resources allocated by the network equipment for the first terminal equipment; or alternatively

When the g-th starting time exceeds the third time, transmitting data by using the resource where the residual transmission time COT of the second terminal equipment is located; the second terminal device is a receiving end of the N transmission requirements;

wherein g is a positive integer, and g is more than or equal to 1 and less than or equal to N.

Optionally, the processing unit 1902 is specifically configured to:

acquiring LBT time lengths corresponding to M transmission requirements; wherein the M transmission requirements include the N transmission requirements; m is an integer greater than N;

determining M starting times according to LBT durations corresponding to the M transmission requirements; the M-th starting time in the M starting times is the starting time of the resource selection range of the M-th transmission requirement in the M transmission requirements; m is a positive integer, and M is more than or equal to 1 and less than or equal to M;

wherein, in the M transmission requirements, the start time of the resource selection range of the N transmission requirements does not exceed a third time, and the start time of the resource selection range of the transmission requirements other than the N transmission requirements exceeds the third time; the third time is a time after a third duration from the time when the transmission requirement of the first terminal equipment appears, and the value of the third duration is determined according to the data transmission delay of the first terminal equipment;

The processing unit 1902 is further configured to:

after transmitting data on the N resources through the communication unit 1901, determining whether to continue transmitting data on the resources where the remaining COT of the second terminal device or the network device is located according to the transmission result indicated by the response responses of the N resources; the second terminal device is a receiving end of the N transmission requirements.

Optionally, the processing unit 1902 is further configured to:

when the first terminal equipment generates transmission requirements, starting LBT; or alternatively

In the process of determining the N resources, starting LBT; or alternatively

After the N resources are determined, LBT is started.

Optionally, the PHY layer processing unit is further configured to:

when the PHY layer processing unit sends the nth starting time to the MAC layer processing unit, starting LBT; or alternatively

When the PHY layer processing unit sends the resource selection range of the nth transmission requirement to the MAC layer processing unit, starting LBT; or alternatively

When the PHY layer processing unit sends a starting time unit of the resource selection range of the nth transmission requirement and a candidate resource set to the MAC layer processing unit, starting LBT; or alternatively

When the PHY layer processing unit sends the candidate resource set of the nth transmission requirement to the MAC layer processing unit, starting LBT; or alternatively

And when the MAC layer processing unit informs the PHY layer processing unit of the resource corresponding to the nth transmission requirement, starting LBT.

In one embodiment, the communication device 1900 is applied to the terminal apparatus in the example shown in fig. 17. The processing unit 1902 is configured to perform the following steps:

selecting a first resource in a first frequency band;

transmitting, by the communication unit 1901, target data on a second resource of a second frequency band;

Optionally, the processing unit 1902 is further configured to:

selecting the second resource in the second frequency band according to the resource mapping relation and the frequency domain position of the first resource;

Wherein the first resource comprises a first resource block, RB, and the second resource comprises a second RB;

the frequency domain location of the first resource includes an RB number of the first RB in the first frequency band; the frequency domain location of the second resource includes an RB number of the second RB in the second frequency band;

the resource mapping relationship is used for representing a mapping relationship between the RB numbers in the first frequency band and the RB numbers in the second frequency band.

Optionally, the first frequency band includes L1 RBs, where L1 is a positive integer; the bandwidth of the first frequency band is B1, and the bandwidth of the second frequency band is B2, b2=x×b1, X >1;

the second frequency band comprises X frequency sub-bands, the bandwidth of each frequency sub-band is B1, the first frequency band is positioned in a y-th frequency sub-band in the X frequency sub-bands, y is more than or equal to 1 and less than or equal to X, and y is an integer;

Optionally, the second frequency band includes L2 RBs, where L2 is a positive integer; the bandwidth of the first frequency band is B1, the bandwidth of the second frequency band is B2, b1=x×b2, X >1;

the first frequency band comprises X frequency sub-bands, the bandwidth of each frequency sub-band is B2, the second frequency band is positioned in a y-th frequency sub-band in the X frequency sub-bands, y is more than or equal to 1 and less than or equal to X, and y is an integer;

Optionally, the processing unit 1902 is further configured to:

determining a first target sub-channel in a plurality of first sub-channels corresponding to the first frequency band according to the frequency domain position of the first resource;

determining a second target sub-channel in a plurality of second sub-channels corresponding to the second frequency band according to the frequency domain position of the second resource;

when the number of RBs occupied by the second target sub-channel is larger than that occupied by the first target sub-channel, performing rate matching on the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal; or alternatively

When the number of RBs occupied by the second target sub-channel is smaller than that occupied by the first target sub-channel, punching the coded signal according to the number of RBs occupied by the second target sub-channel to obtain a target signal;

the coded signal is obtained by coding the target data according to the number of RBs occupied by the first target sub-channel;

the processing unit 1902 is specifically configured to:

the target signal is transmitted on the second target subchannel through the communication unit 1901.

Based on the above embodiments, the embodiments of the present application further provide a terminal device, where the terminal device may be applied to a SL-U system, and may implement the methods in the above embodiments, and have the function of the communications apparatus 1900. Referring to fig. 20, the terminal device 2000 includes: a transceiver 2001, at least one processor 2002, and a memory 2003. Wherein said transceiver 2001, said processor 2002 and said memory 2003 are interconnected.

Optionally, the transceiver 2001, the at least one processor 2002 and the memory 2003 are interconnected by a bus 2004. The bus 2004 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 20, but not only one bus or one type of bus.

The transceiver 2001 is configured to receive and transmit signals, and enable communication with other terminal devices or network devices. Alternatively, the transceiver 2001 may be implemented by a radio frequency device and an antenna.

The at least one processor 2002 includes at least an RRC layer processing unit and a MAC layer processing unit. The RRC layer processing list is used for executing the steps of the RRC layer to realize the functions of the RRC layer. And the MAC layer processing unit is used for executing the steps of the MAC layer and realizing the functions of the MAC layer.

The functions of the processor 2002, and the specific functions of the RRC layer processing unit and the MAC layer processing unit may refer to the descriptions in the above embodiments, and are not described herein.

The processor 2002 may be, among other things, a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP, etc. The processor 2002 may further comprise a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof. The processor 2002 may be implemented by hardware, or may be implemented by hardware executing corresponding software.

The memory 2003 stores program instructions and the like. In particular, the program instructions may comprise program code comprising computer-operating instructions. The memory 2003 may include a random access memory (random access memory, RAM) and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 2002 executes the program instructions stored in the memory 2003 to implement the functions described above, thereby implementing the methods provided in the above-described embodiments.

Based on the above embodiments, the present application further provides a computer program, which when run on a computer causes the computer to perform the method provided by the above embodiments.

Based on the above embodiments, the present application further provides a computer-readable storage medium having stored therein a computer program, which when executed by a computer, causes the computer to perform the method provided in the above embodiments.

Alternatively, the computer may include, but is not limited to, a terminal device.

Wherein a storage medium may be any available medium that can be accessed by a computer. Taking this as an example but not limited to: the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

Based on the above embodiments, the present application further provides a chip, where the chip is configured to read the computer program stored in the memory, and implement the method provided in the above embodiments. Optionally, the chip may include a processor and a memory, where the processor is coupled to the memory, and is configured to read a computer program stored in the memory, to implement the method provided in the foregoing embodiment.

Based on the above embodiments, the embodiments of the present application provide a chip system, which includes a processor for supporting a computer device to implement the functions related to the terminal device in the above embodiments. In one possible design, the chip system further includes a memory for storing programs and data necessary for the computer device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In summary, the embodiment of the application provides a resource allocation method and equipment. By the method, the first terminal equipment can reserve N resources according to LBT duration corresponding to N transmission requirements. Because the LBT duration is considered, the situation that the LBT duration of the transmission requirement is not finished when the resource corresponding to a certain transmission requirement is reached can be reduced, so that the probability that the first terminal equipment can use the resource corresponding to the transmission requirement to transmit data can be improved, and the communication efficiency of the terminal equipment is ensured.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A resource allocation method applied to a first terminal device, the method comprising:

2. The method of claim 1, wherein determining N resources according to LBT durations corresponding to the N transmission requirements comprises:

3. The method of claim 2, wherein the first terminal device comprises a physical PHY layer and a medium access control MAC layer;

determining an nth starting time according to the LBT duration corresponding to the nth transmission requirement, including:

The PHY layer determines the nth starting time according to the LBT duration corresponding to the nth transmission requirement;

according to the nth starting time, determining the resource corresponding to the nth transmission requirement comprises the following steps:

the PHY layer sends the nth start time to the MAC layer; the MAC layer determines the resource selection range of the nth transmission requirement according to the nth starting time; the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement; or alternatively

The PHY layer determines the resource selection range of the nth transmission requirement according to the nth starting time; the PHY layer sends the resource selection range of the nth transmission requirement to the MAC layer; the MAC layer determines the resource corresponding to the nth transmission requirement in the resource selection range of the nth transmission requirement; or alternatively

The PHY layer determines a starting time unit of a resource selection range of the nth transmission requirement according to the nth starting time; the PHY layer sends a starting time unit and a candidate resource set of the resource selection range of the nth transmission requirement to the MAC layer; the MAC layer selects a range starting time unit according to the resources of the nth transmission requirement, and determines resources corresponding to the nth transmission requirement in the resource candidate set; or alternatively

The PHY layer determines a candidate resource set of the nth transmission requirement according to the nth starting time; the PHY layer sends the candidate resource set of the nth transmission requirement to the MAC layer; the MAC layer determines resources corresponding to the nth transmission requirement in the candidate resource set of the nth transmission requirement;

wherein any candidate resource set contains at least one candidate resource.

4. A method according to claim 2 or 3, wherein the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n The following formula is satisfied:

or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value;t _cpe for the duration of the cyclic prefix extension.

5. The method of claim 2 or 3, wherein determining the nth start time based on the LBT duration corresponding to the nth transmission requirement comprises:

6. The method of claim 5, wherein the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n The following formula is satisfied:

or alternatively

Or alternatively

Wherein t is ₀ The time when the transmission requirement appears for the first terminal equipment; t is t _n,LBT The LBT duration corresponding to the nth transmission requirement is set; t is t _s Is the length of the time unit for scheduling data transmission resources; t (T) _offset Is an offset value; t is t _cpe A duration extending for the cyclic prefix; t is t _i,R The nth transmission requirementi durations of resources corresponding to prior transmission needs,a sum of time durations of resources corresponding to n-1 prior transmission demands of the nth transmission demand; s is S _i,R The number of time units occupied by the resource corresponding to the ith preceding transmission need of said nth transmission need,/->And the sum of the number of time units occupied by the resources corresponding to the n-1 prior transmission requirements of the nth transmission requirement.

7. The method of claim 2 or 3, wherein determining the nth start time based on the LBT duration corresponding to the nth transmission requirement comprises:

8. The method of claim 7, wherein,

the prior acknowledgement response of the nth transmission requirement includes an acknowledgement response of the prior transmission requirement of the nth transmission requirement; or alternatively

9. The method of claim 7 or 8, wherein the nth start time corresponds to t ₀ +T _n The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is _n The following formula is satisfied:

or alternatively

Or alternatively

10. The method of any one of claims 2-9, wherein the method further comprises:

in the process of transmitting data on the N resources, determining that the LBT duration corresponding to the nth transmission requirement is not finished;

11. The method of claim 10, wherein determining that the LBT duration corresponding to the nth transmission requirement is not ended comprises at least one of:

12. The method of claim 10 or 11, wherein,

before transmitting data on the N resources, the method further comprises:

determining a kth starting time according to the LBT duration corresponding to the kth transmission requirement; the kth transmission requirement is a subsequent transmission requirement of the nth transmission requirement, k is a positive integer, and N < k is less than or equal to N; the kth starting time is the starting time of the resource selection range of the kth transmission requirement;

determining a resource corresponding to the kth transmission requirement according to the kth starting time;

After determining that the LBT duration corresponding to the nth transmission requirement is not over, the method further includes:

13. The method of claim 10 or 11, wherein,

before transmitting data on the N resources, the method further comprises:

determining that the second duration is smaller than the LBT residual duration corresponding to the kth transmission requirement; or determining that a second time after the second duration from the first time is later than the starting time of the resource corresponding to the kth transmission requirement; wherein the second duration is the sum of the LBT remaining duration corresponding to the nth transmission requirement and (k-n) minimum time intervals; the first time is the time when the LBT duration corresponding to the nth transmission requirement is not ended;

14. The method of any one of claim 2 to 13,

15. The method of claim 14, wherein the method further comprises:

when the g-th starting time exceeds the third time, a first resource request is sent to the second terminal equipment; receiving first resource configuration information from the second terminal equipment; the first resource configuration information is used for indicating the resources allocated by the second terminal equipment for the first terminal equipment, the second terminal equipment is a receiving end of the N transmission requirements, and the transmission resources occupied by the first resource request are pre-negotiated or agreed by the first terminal equipment and the second terminal equipment; or alternatively

When the g-th starting time exceeds the third time, sending a second resource request to the network equipment; receiving second resource configuration information from the network device; the second resource configuration information is used for indicating resources allocated by the network equipment for the first terminal equipment; or alternatively

16. The method of claim 2, wherein obtaining LBT durations corresponding to N transmission requirements comprises:

the method further comprises the steps of:

after transmitting data on the N resources, judging whether to continue transmitting data on the resources where the residual COT of the second terminal equipment or the network equipment is located according to the transmission results indicated by the response responses of the N resources; the second terminal device is a receiving end of the N transmission requirements.

17. The method of any one of claims 1-16, wherein the method further comprises:

In the process of determining the N resources, starting LBT; or alternatively

After the N resources are determined, LBT is started.

18. A method as claimed in claim 3, wherein the method further comprises:

when the PHY layer transmits the nth starting time to the MAC layer, starting LBT; or alternatively

When the PHY layer sends the resource selection range of the nth transmission requirement to the MAC layer, starting LBT; or alternatively

When the PHY layer transmits a starting time unit of the resource selection range of the nth transmission requirement and a candidate resource set to the MAC layer, starting LBT; or alternatively

When the PHY layer sends the candidate resource set of the nth transmission requirement to the MAC layer, starting LBT; or alternatively

And when the MAC layer informs the PHY layer of the resource corresponding to the nth transmission requirement, starting LBT.

19. A communication device, comprising:

a communication unit for receiving and transmitting signals;

a processing unit for performing the method of any of claims 1-18.

20. A terminal device, comprising:

a transceiver for receiving and transmitting signals;

a memory for storing program instructions and data;

a processor for reading program instructions and data in said memory, implementing the method of any of claims 1-18.

21. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1-18.

22. A chip, wherein the chip comprises a processor and a memory; the processor being coupled to the memory for reading a computer program stored in the memory for performing the method of any of claims 1-18.