CN117793674A

CN117793674A - Communication method and device

Info

Publication number: CN117793674A
Application number: CN202211431079.4A
Authority: CN
Inventors: 何泓利; 李雪茹; 王碧钗; 焦瑞晟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-27
Filing date: 2022-11-15
Publication date: 2024-03-29
Also published as: WO2024067189A1

Abstract

The application relates to a communication method and device. The first terminal device determines configuration information for configuring the first resource pool and a plurality of feedback intervals associated with the first resource pool. The first terminal equipment receives first sidestream data at a first resource, and the time domain resource of the first resource comprises a first time unit in a first resource pool. The first terminal device determines a target feedback interval, the target feedback interval being one of the plurality of feedback intervals. The first terminal equipment determines a first feedback resource unit according to the position of the first resource and the target feedback interval, wherein the first feedback resource unit is positioned on a second time unit, and the interval between the second time unit and the first time unit is larger than or equal to the target feedback interval. By associating a plurality of feedback intervals for one resource pool, different devices using the resource pool can select appropriate feedback intervals, so that the time delay requirements of different services can be met.

Description

Communication method and device

Cross Reference to Related Applications

The present application claims priority from the chinese patent application filed at 2022, 09, 27, with application number 202211183624.2, application name "a feedback channel transmission method and sidestream communication apparatus", 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 communications method and apparatus.

Background

Sidelink (SL) is an important technology enabled in long term evolution (long term evolution, LTE) systems and fifth generation mobile communication (the fifth generation, 5G) New Radio (NR) systems that enables device-to-device (D2D) direct communication without having to pass through a base station. Because the transmission between the devices does not need to be forwarded through the base station, the SL communication can achieve shorter delay, higher spatial multiplexing efficiency and lower core network load, and has great effect in scenes with higher local communication demands such as vehicle-to-vehicle (vehicle to everything, V2X), smart home, short-range transmission, virtual/augmented reality (virtual/augmented reality, VR/AR), smart factories and the like.

In SL communication, after a User Equipment (UE) 1 transmits SL data to a UE2, the UE2 may transmit feedback information to the UE1 to indicate to the UE1 whether the UE2 successfully receives the SL data. To transmit the feedback information, UE1 and UE2 need to determine where the resources that can be used to transmit the feedback information are located, e.g., to determine the index of the physical resource blocks (physical resource block, PRBs) that can be used to transmit the feedback information. The parameters for determining the index of the PRB include a minimum feedback interval, which refers to a minimum time interval between a slot (slot) for transmitting the feedback information and a slot in which the SL data is located. Currently, a SL resource pool is configured with a minimum feedback interval, and all UEs using the SL resource pool determine indexes of PRBs for transmitting feedback information according to the minimum feedback interval.

The problem caused by this is that the time delay requirements of different services may be different, some services with higher time delay requirements expect the minimum feedback interval to be as small as possible, and some services with lower time delay requirements expect the minimum feedback interval to be larger. A minimum feedback interval is fixedly configured in a SL resource pool, and thus the requirements of different services cannot be met. For example, if the minimum feedback interval is small, UEs that perform services requiring less time delay also need to communicate at a small minimum time interval, which increases the cost of these UEs; if the minimum feedback interval is larger, the time delay requirement of the service with higher time delay requirement cannot be met.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for enabling a minimum feedback interval to meet the time delay requirements of different services.

In a first aspect, a first communication method is provided, which may be performed by a terminal device, or by another device comprising the functionality of the terminal device, or by a chip system (or chip) or other functional module, which is capable of implementing the functionality of the terminal device, the chip system or functional module being provided in the terminal device, for example. The terminal device is for example referred to as a first terminal device. The method comprises the following steps: determining configuration information for configuring a first resource pool for the first terminal device to communicate with other terminal devices (e.g., for the first terminal device to send and/or receive signals) and a plurality of feedback intervals associated with the first resource pool; receiving first side line data at a first resource, wherein a time domain resource of the first resource comprises a first time unit in the first resource pool; determining a target feedback interval, the target feedback interval being one of the plurality of feedback intervals; and determining a first feedback resource unit according to the position of the first resource and the target feedback interval, wherein the first feedback resource unit is positioned on a second time unit, and the interval between the second time unit and the first time unit is larger than or equal to the target feedback interval.

In the embodiment of the present application, a plurality of feedback intervals may be associated for the first resource pool, and two terminal devices may select an appropriate feedback interval (the selected feedback interval is referred to as a target feedback interval) from the plurality of feedback intervals when communicating, where the target feedback interval can meet the capability and time delay requirements of the two terminal devices. By associating a plurality of feedback intervals for a resource pool, different devices using the resource pool are enabled to select respective suitable feedback intervals. For example, if the service executed by the terminal device has a higher requirement on the time delay, the terminal device may select a feedback interval with a smaller value as the target feedback interval to meet the time delay requirement of the service; if the service executed by the terminal equipment has lower requirement on time delay, the terminal equipment can select the feedback interval with larger value as the target feedback interval, thereby not only meeting the time delay requirement of the service, but also not having excessively high requirement on the capability of the terminal equipment and reducing the cost of the terminal equipment. Therefore, by adopting the scheme of the embodiment of the application, the time delay requirements of different services can be met. Meanwhile, in the embodiment of the application, the mapping relation between the data transmission resources and the feedback resources is designed by comprehensively considering a plurality of feedback intervals associated with the resource pool, so that after a plurality of associated feedback intervals are introduced into one resource pool, the feedback resources corresponding to different data transmission resources are also ensured to be different, and the conflict of the feedback resources is avoided.

In an alternative embodiment, the method further comprises: and sending feedback information of the first sidestream data in the first feedback resource unit. After determining the first feedback resource unit, the first terminal device may send feedback information of the first side line data by using the first feedback resource unit, where the feedback information may indicate success or failure of receiving the first side line data.

In an alternative embodiment, the method further comprises: determining a larger value of a first feedback interval and a second feedback interval as the target feedback interval, or determining the first feedback interval as the target feedback interval, wherein the first feedback interval is a feedback interval supported by the first terminal equipment, the first feedback interval belongs to the plurality of feedback intervals, the second feedback interval is a feedback interval supported by the second terminal equipment, and the second feedback interval belongs to the plurality of feedback intervals. The first terminal device and the second terminal device determine larger values of the first feedback interval and the second feedback interval, which is equivalent to determining the minimum feedback interval which can be supported by both the two terminal devices as a target feedback interval in a plurality of feedback intervals supported by the first resource pool. The target feedback interval not only accords with the capability of two terminal devices, but also can reduce the transmission delay as much as possible. Or, considering that the first device needs to perform demodulation of SL data and generation of a feedback signal, the first device and the second device determine a target feedback interval according to the feedback interval supported by the first device.

In an optional implementation manner, the first feedback interval is a feedback interval with the smallest value in a feedback intervals supported by the first terminal device, the second feedback interval is a feedback interval with the smallest value in B feedback intervals supported by the second terminal device, the a feedback intervals belong to the plurality of feedback intervals, the B feedback intervals belong to the plurality of feedback intervals, and both a and B are positive integers. The first terminal device may support a feedback intervals of the plurality of feedback intervals, and the second terminal device may support B feedback intervals of the plurality of feedback intervals, and then the feedback interval having the smallest value, i.e., the first feedback interval, may be determined from the a feedback intervals, and the feedback interval having the smallest value, i.e., the second feedback interval, may be determined from the B feedback intervals, so that the smallest feedback interval that both terminal devices may support may be finally determined.

In an alternative embodiment, the method further comprises: and sending first information to second terminal equipment, wherein the first information is used for indicating the target feedback interval. In this manner, the first terminal device determines the target feedback interval and sends first information to the second terminal device, which may indicate the target feedback interval. The second terminal device can determine the target feedback interval according to the first information without the second terminal device performing more processes of determining the target feedback interval. The target feedback interval determined by the two terminal devices is consistent, and the workload of the second terminal device is reduced.

In an alternative embodiment, the method further comprises: receiving first information from a second terminal device, wherein the first information is used for indicating the target feedback interval; determining a target feedback interval includes: and determining the target feedback interval according to the first information. In this manner, the second terminal device determines the target feedback interval and sends first information to the first terminal device, which may indicate the target feedback interval. The first terminal device can determine the target feedback interval according to the first information without the first terminal device performing more processes of determining the target feedback interval. The target feedback interval determined by the two terminal devices is consistent, and the workload of the first terminal device is reduced.

In an alternative embodiment, the method further comprises: before receiving the first side data, receiving second information from a second terminal device, or sending the second information to the second terminal device, where the second information includes an association relationship between X feedback intervals and X side HARQ process identifiers, or includes an association relationship between X feedback intervals and X priorities, or includes an association relationship between X feedback intervals and X transmission resources, where the X feedback intervals included in the second information belong to the multiple feedback intervals, and X is a positive integer.

In an alternative embodiment, the method further comprises: receiving sidestream control information, wherein the sidestream control information is used for scheduling first sidestream data; determining a target feedback interval includes: the lateral control information comprises information of a first lateral HARQ process identifier, the association of the first lateral HARQ process identifier and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval; or, the sidestream control information includes information of a first priority, the association of the first priority and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval; or, the sidestream control information includes information of the first resource, the association between the first resource and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval. The sidestream control information is used for scheduling the first sidestream data, and can also be understood that the sidestream control information is associated with the first sidestream data. The sidestream control information includes information of the first resource, which may be understood that the sidestream control information includes information of a third resource, where the third resource includes one or more resources, and the one or more resources include the first resource, and other resources in the third resource except for the first resource may be resources reserved by the second terminal device for retransmission of the second terminal device. In addition, the second information may include an association relationship between the first resource and the third feedback interval, and the first terminal device may determine the third feedback interval according to the first resource; or, the second information may also include an association relationship between a third resource and a third feedback interval, where the third resource is a periodic resource, and the first resource is a resource of the third resource in one period, so that association between the first resource and the third feedback interval may also be determined.

In this way, the determining process of the target feedback interval is flexible, for example, when different services are executed or when different sidestream data are transmitted, two terminal devices can select different feedback intervals as the target feedback interval, so that the selected target feedback interval is more matched with the current scene. And this approach can be considered as implicitly indicating the target feedback interval, so that the signaling overhead can be reduced without indicating the target feedback interval by additional explicit information.

In an alternative embodiment, the method further comprises: receiving sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data, and the sidestream control information is also used for indicating the target feedback interval; determining a target feedback interval includes: and determining the target feedback interval according to the sidestream control information. In this way, the determining process of the target feedback interval is flexible, for example, when different services are executed or when different sidestream data are transmitted, the terminal device can select different feedback intervals as the target feedback interval, so that the selected target feedback interval is more matched with the current scene.

In an alternative embodiment, the method further comprises: and transmitting first capability information to the second terminal equipment and/or receiving second capability information from the second terminal equipment, wherein the first capability information indicates at least one feedback interval in the plurality of feedback intervals, and the second capability information indicates at least one feedback interval in the plurality of feedback intervals. The two terminal devices may send respective capability information to each other, so that both terminal devices can learn feedback intervals supported by themselves and the opposite terminal device, thereby helping the two terminal devices to determine the target feedback interval.

In an alternative embodiment, the configuration information includes information of a feedback period, and the method further includes: determining at least one time unit in the first resource pool according to the feedback period, wherein the at least one time unit comprises a feedback resource unit for transmitting feedback information; and determining the second time unit from the at least one time unit according to the first time unit and the target feedback interval, wherein the second time unit is the first time unit which is positioned behind the first time unit in the at least one time unit and has an interval with the first time unit greater than or equal to the target feedback interval. The first terminal device determines a time unit for transmitting the feedback information to transmit the feedback information. In the embodiment of the application, the first terminal device can determine the second time unit for sending the feedback information according to the feedback period, the first time unit and the target feedback interval, and can be matched with the actual capability and the requirement of the terminal device.

In an alternative embodiment, the method further comprises: determining N associated with the second time unit based on the second time unit and the plurality of feedback intervals ₁ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to a fourth feedback interval, and an interval between the third time unit and the second time unit is less than the fourth feedback interval plus the feedback period, the N ₁ The time units include the third time unit, wherein the fourth feedback interval is any one feedback interval of the feedback intervals, N ₁ Is a positive integer. N associated with a second time cell ₁ The time units are indicated in the N ₁ The sidestream data transmitted on the time units, the feedback information of which may be transmitted on the second time units. Although the embodiment of the present application describes the process of determining the feedback resource unit by taking the first terminal device and the second terminal device as examples, there may be other communication processes of the terminal devices on the first resource pool, and when the terminal devices transmit data and corresponding feedback information, feedback may be performed by using a feedback interval different from the target feedback interval determined by the first terminal device and the second terminal device, for example, one feedback interval other than the target feedback interval among the feedback intervals associated with the first resource pool. In the embodiment of the present application, the feedback resource unit on the second time unit may be used by the terminal device with any feedback interval, so when determining the time unit associated with the second time unit, not only the target feedback interval between the first terminal device and the second terminal device, but also other feedback intervals associated with the first resource pool need to be considered. The first terminal device may determine the time units associated with the second time units based on the plurality of feedback intervals associated with the first resource pool.

Optionally, the second time unit and N ₁ The association of a time cell can be understood as a second time cell with N ₁ The time units are associated according to a first relationship. Further, the methodThe above N ₁ Part of the time units can be excluded from the time units to determine the remaining N ₃ Time units, N ₃ Is less than or equal to N ₁ Positive integer of N ₃ The time units are associated with the second time unit according to a second relationship. For example, if N ₁ The time units include a fourth time unit, and the second time unit is the first time unit located after the fourth time unit and spaced from the fourth time unit by a distance greater than or equal to the fourth feedback interval, of the at least one time unit (time units including feedback resource units for transmitting feedback information), then N ₃ The time units include a fourth time unit, wherein the fourth feedback interval is any one of a plurality of feedback intervals. That is, in some cases, it may occur that the number of time units actually associated with the second time unit is less than N due to limited time unit numbers, etc ₁ Is the case in (a).

In an alternative embodiment, the N ₁ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the first resource pool, M ₁ The feedback resource units are feedback resource units (or, M ₁ Representing the number of feedback resource units over the second time unit), M ₁ Is greater than or equal to N ₁ D is a positive integer. Alternatively, M ₁ The feedback resource units may be configured by the configuration information. In determining N ₁ After the time units, the first terminal device may determine feedback resource units associated with the first time units and the frequency domain units for transmitting the first sidestream data according to the above formula. In general, the configuration information of the resource pool may be such that M ₁ Is D.N ₁ Is satisfied such that C ₁ Is a positive integer. If M occurs ₁ Not D.N ₁ Special cases of integer multiples of C ₁ Corresponding rounding may also be performed, either upper or lower.

By the association method, the N ₁ Any one time unit and the resource corresponding to the frequency domain unit can be mapped to the corresponding feedback resource unit on the second time unit, and the feedback resource units corresponding to the resource mapping of different time units or frequency domain units are different. Therefore, even if a plurality of feedback intervals are configured on the first resource pool, if different time units or frequency domain units corresponding to different SL data are satisfied, the corresponding feedback resource units are different, that is, the problem of collision of feedback resources is not generated.

In an alternative embodiment, the N ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,in this way, when the number of time units actually associated with the second time unit is less than N ₁ In this case, the feedback resource units associated with one time unit and the frequency domain unit may also be determined by referring to the corresponding methods.

In an alternative embodiment, the N ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₃ )·C ₃ ，(i+j·N ₃ +1)·C ₃ -1]Wherein, the method comprises the steps of, wherein,in general, the configuration information of the resource pool may be such that M ₁ Is D.N ₃ Is satisfied such that C ₃ Is a positive integer. If M occurs ₁ Not D.N ₃ Special cases of integer multiples of C ₃ Can also be performedThe corresponding rounding is either upper or lower. In this way, when the number of time units actually associated with the second time unit is less than N ₁ In this case, M can be considered as ₁ The feedback resource units are divided into N ₃ Time units among the time units and frequency domain units.

In an alternative embodiment, the method further comprises: determining N associated with the second time unit according to the second time unit and the target feedback interval ₂ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to the target feedback interval, and an interval between the third time unit and the second time unit is less than the target feedback interval plus the feedback period, the N ₂ The time units comprise the third time unit, N ₂ Is a positive integer. Optionally, the second time unit includes a plurality of feedback resource unit sets, where the plurality of feedback resource unit sets correspond to the plurality of feedback intervals one by one, and each feedback resource unit set includes one or more feedback resource units, and the M ₂ And the configuration information comprises the corresponding relation between the feedback resource unit sets and the feedback intervals. That is, the configuration information may configure a correspondence between a plurality of feedback resource unit sets (e.g., index sets of feedback resource units) and a plurality of feedback intervals, e.g., feedback resource unit sets and feedback intervals one-to-one. Each set of feedback resource units may include one or more feedback resource units (e.g., an index including one or more feedback resource units), and different sets of feedback resource units may not have intersections. In this configuration mode, the feedback resource unit sets corresponding to different feedback intervals are different, so that the terminal equipment adopting different feedback intervals will not collide when determining the feedback resource unit, and therefore the first terminal equipment determines that the first terminal equipment is associated with the second time unit When the time unit is used, only the target feedback interval is needed to be considered, and other feedback intervals except the target feedback interval in the feedback intervals are not needed to be considered, so that the execution process of the first terminal equipment can be simplified. Alternatively, N ₂ May be a positive integer equal to the feedback period.

Optionally, the second time unit and N ₂ The association of a time cell can be understood as a second time cell with N ₂ The time units are associated according to a third relationship. Further, in the above N ₂ Part of the time units can be excluded from the time units to determine the remaining N ₄ Time units, N ₄ Is less than or equal to N ₂ Positive integer of N ₄ The time units are associated with the second time unit according to a fourth relationship. For example, if N ₂ The time units include a fourth time unit, and the second time unit is the first time unit located after the fourth time unit and spaced from the fourth time unit by a distance greater than or equal to the target feedback interval, of the at least one time unit (time units including feedback resource units for transmitting feedback information), then N ₄ The time units include a fourth time unit. That is, in some cases, due to limited time cell numbers, etc., it may occur that the number of time cells actually associated with the second time cell is less than N ₂ Is the case in (a).

In an alternative embodiment, the N ₂ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the first resource pool, M ₂ The feedback resource units are feedback resource units (or, M) associated with the target feedback interval over the second time unit ₂ Representing the number of feedback resource units associated with the target feedback interval over the second time unit), M ₂ Is greater than or equal to N ₂ D is a positive integer. In determining N ₂ After the time units, the first terminal device may determine feedback resource units associated with the first time units and the frequency domain units for transmitting the first sidestream data according to the above formula. In general, the configuration information of the resource pool may be such that M ₂ Is D.N ₂ Is satisfied such that C ₂ Is a positive integer. If M occurs ₂ Not D.N ₂ Special cases of integer multiples of C ₂ Corresponding rounding may also be performed, either upper or lower.

At the same time through the association method, the N is as follows ₂ Any one time unit and the resources corresponding to the frequency domain unit can be mapped on the second time unit, and the feedback resource units corresponding to the resource mapping of different time units or frequency domain units are different, so that as long as the time units or the frequency domain units corresponding to different SL data are satisfied for the same feedback interval, the corresponding feedback resource units are different, namely the problem of conflict of feedback resources is not generated.

In an alternative embodiment, the N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,in this way, when the number of time units actually associated with the second time unit is less than N ₂ In this case, the feedback resource units associated with one time unit and the frequency domain unit may also be determined by referring to the corresponding methods.

In an alternative embodiment, the N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₄ )·C ₄ ，(i+j·N ₄ +1)·C ₄ -1]Wherein, the method comprises the steps of, wherein,in general, the configuration information of the resource pool may be such that M ₂ Is D.N ₄ Is satisfied such that C ₄ Is a positive integer. If M occurs ₂ Not D.N ₄ Special cases of integer multiples of C ₄ Corresponding rounding may also be performed, either upper or lower. In this way, when the number of time units actually associated with the second time unit is less than N ₂ In this case, M can be considered as ₂ The feedback resource units are divided into N ₄ Time units among the time units and frequency domain units.

In an alternative embodiment, the method further comprises: determining one or more feedback resource units on the second time unit associated with time units and frequency domain units comprised by the first resource; the first feedback resource unit is determined from the one or more feedback resource units. According to the above formula, the first terminal device may determine one or more feedback resource units, and then the first terminal device may finally determine the first feedback resource unit from the one or more feedback resource units to send the feedback information.

In an alternative embodiment, the time unit comprises a time slot, the frequency domain unit comprises a subchannel, the feedback resource unit comprises a PRB, the first resource comprises one time slot or a plurality of time slots in the time domain, and one or a plurality of subchannels in the frequency domain.

In a second aspect, a second communication method is provided, which may be performed by a terminal device, or by another device comprising the functionality of the terminal device, or by a chip system (or chip) or other functional module capable of implementing the functionality of the terminal device, the chip system or functional module being for example provided in the terminal device. The terminal device is for example referred to as a second terminal device. The method comprises the following steps: determining configuration information for configuring a first resource pool for the second terminal device to communicate with other terminal devices (e.g., for the second terminal device to send and or receive signals), and a plurality of feedback intervals associated with the first resource pool; transmitting first sidestream data on a first resource, wherein a first time unit in the first resource pool comprises time domain resources of the first resource; determining a target feedback interval, the target feedback interval being one of the plurality of feedback intervals; and determining a first feedback resource unit according to the position of the first resource and the target feedback interval, wherein the first feedback resource unit is positioned on a second time unit, and the interval between the second time unit and the first time unit is larger than or equal to the target feedback interval.

In an alternative embodiment, the method further comprises: and receiving feedback information of the first sidestream data in the first feedback resource unit.

In an alternative embodiment, the method further comprises: determining a larger value of a first feedback interval and a second feedback interval as the target feedback interval, or determining the first feedback interval as the target feedback interval, wherein the first feedback interval is a feedback interval supported by the first terminal equipment, the first feedback interval belongs to the plurality of feedback intervals, the second feedback interval is a feedback interval supported by the second terminal equipment, and the second feedback interval belongs to the plurality of feedback intervals.

In an optional implementation manner, the first feedback interval is a feedback interval with the smallest value in a feedback intervals supported by the first terminal device, the second feedback interval is a feedback interval with the smallest value in B feedback intervals supported by the second terminal device, the a feedback intervals belong to the plurality of feedback intervals, the B feedback intervals belong to the plurality of feedback intervals, and both a and B are positive integers.

In an alternative embodiment, the method further comprises: and sending first information to the first terminal equipment, wherein the first information is used for indicating the target feedback interval.

In an alternative embodiment, the method further comprises: receiving first information from a first terminal device; determining a target feedback interval includes: and determining the target feedback interval according to the first information.

In an alternative embodiment, the method further comprises: before the first side data is sent, second information is sent to the first terminal equipment, or the second information from the first terminal equipment is received, wherein the second information comprises the association relation between X feedback intervals and X side HARQ processes, or the association relation between X feedback intervals and X priorities, or the association relation between X feedback intervals and X transmission resources, wherein the X feedback intervals included in the second information belong to the feedback intervals, and X is a positive integer.

In an alternative embodiment, the method further comprises: and sending the sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data. The sidestream control information comprises information of a first sidestream HARQ process identifier, the first sidestream HARQ process identifier is used for determining the target feedback interval according to the second information by the first terminal device (or the sidestream control information comprises information of the first sidestream HARQ process identifier, and the target feedback interval is a feedback interval associated with the first HARQ process identifier in the second information); or, the sidestream control information includes information of a first priority, where the information of the first priority is used for the first terminal device to determine the target feedback interval according to the second information (or, the sidestream control information includes information of the first priority, where the target feedback interval is a feedback interval associated with the first priority in the second information); or, the sidestream control information includes information of the first resource, where the information of the first resource is used for the first terminal device to determine the target feedback interval according to the second information (or, the sidestream control information includes information of the first resource, where the target feedback interval is a feedback interval associated with the first resource in the second information). The sidestream control information is used for scheduling the first sidestream data, and can also be understood that the sidestream control information is associated with the first sidestream data. The sidestream control information includes information of the first resource, which may be understood that the sidestream control information includes information of a third resource, where the third resource includes one or more resources, and the one or more resources include the first resource, and other resources in the third resource except for the first resource may be resources reserved by the second terminal device for retransmission of the second terminal device. In addition, the second information may include an association relationship between the first resource and the third feedback interval, and the second terminal device may determine the third feedback interval according to the first resource; or, the second information may also include an association relationship between a third resource and a third feedback interval, where the third resource is a periodic resource, and the first resource is a resource of the third resource in one period, so that association between the first resource and the third feedback interval may also be determined.

In an alternative embodiment, the method further comprises: and sending sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data, and the sidestream control information is also used for indicating the target feedback interval.

In an alternative embodiment, the method further comprises: and transmitting second capability information to the first terminal equipment and/or receiving first capability information from the first terminal equipment, wherein the first capability information indicates at least one feedback interval, and the second capability information indicates at least one feedback interval.

In an alternative embodiment, the configuration information includes information of a feedback period, and the method further includes: determining at least one time unit in the first resource pool according to the feedback period, wherein the at least one time unit comprises a feedback resource unit for transmitting feedback information; and determining the second time unit from the at least one time unit according to the first time unit and the target feedback interval, wherein the second time unit is the first time unit which is positioned behind the first time unit in the at least one time unit and has an interval with the first time unit greater than or equal to the target feedback interval.

In an alternative embodimentWherein the method further comprises: determining N associated with the second time unit based on the second time unit and the plurality of feedback intervals ₁ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to a fourth feedback interval, and an interval between the third time unit and the second time unit is less than the fourth feedback interval plus the feedback period, the N ₁ The time units include the third time unit, wherein the fourth feedback interval is any one feedback interval of the feedback intervals, N ₁ Is a positive integer.

Optionally, the second time unit and N ₁ The association of a time cell can be understood as a second time cell with N ₁ The time units are associated according to a first relationship. Further, in the above N ₁ Part of the time units can be excluded from the time units to determine the remaining N ₃ Time units, N ₃ Is less than or equal to N ₁ Positive integer of N ₃ The time units are associated with the second time unit according to a second relationship. For example, if N ₁ The time units include a fourth time unit, and the second time unit is the first time unit located after the fourth time unit and spaced from the fourth time unit by a distance greater than or equal to the fourth feedback interval, of the at least one time unit (time units including feedback resource units for transmitting feedback information), then N ₃ The time units include a fourth time unit, wherein the fourth feedback interval is any one of a plurality of feedback intervals. That is, in some cases, due to limited time cell numbers, etc., it may occur that the number of time cells actually associated with the second time cell is less than N ₁ Is the case in (a).

In an alternative embodiment, the N ₁ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the second resource pool, M ₁ The feedback resource units are feedback resource units (or, M ₁ Representing the number of feedback resource units over the second time unit), M ₁ Is greater than or equal to N ₁ D is a positive integer.

In an alternative embodiment, the N ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,

in an alternative embodiment, the N ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₃ )·C ₃ ，(i+j·N ₃ +1)·C ₃ -1]Wherein, the method comprises the steps of, wherein,

in an alternative embodiment, the method further comprises: determining N associated with the second time unit according to the second time unit and the target feedback interval ₂ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to the target feedback interval, and an interval between the third time unit and the second time unit is less than the target feedback interval plus the feedback period, the N ₂ The time units comprise the third time unit, N ₂ Is a positive integer. Alternatively, N ₂ May be a positive integer equal to the feedback period.

In an alternative embodiment, the N ₂ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the first resource pool, M ₂ The feedback resource units are feedback resource units (or, M) associated with the target feedback interval over the second time unit ₂ Representing the number of feedback resource units associated with the target feedback interval over the second time unit), M ₂ Is greater than or equal to N ₂ D is a positive integer.

In an alternative embodiment, the N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,

in an alternative embodiment, the N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₄ )·C ₄ ，(i+j·N ₄ +1)·C ₄ -1]Wherein, the method comprises the steps of, wherein,

in an alternative embodiment, the second time unit includes a plurality of feedback resource unit sets, the plurality of feedback resource unit sets are in one-to-one correspondence with the plurality of feedback intervals, each feedback resource unit set includes one or more feedback resource units, the M ₂ And the configuration information comprises the corresponding relation between the feedback resource unit sets and the feedback intervals.

In an alternative embodiment, the method further comprises: determining one or more feedback resource units associated with the time units and the frequency domain units included in the first resource on the second time unit according to the time units and the frequency domain units included in the first resource; the first feedback resource unit is determined from the one or more feedback resource units.

Regarding the technical effects brought about by the second aspect or various alternative embodiments, reference may be made to the description of the technical effects of the first aspect or corresponding embodiments.

In a third aspect, a communication device is provided. The communication device may be the first terminal apparatus of any one of the first to second aspects. The communication device has the function of the first terminal device. The communication means are for example a first terminal device, or a larger device comprising the first terminal device, or a functional module in the first terminal device, such as a baseband device or a system on chip, etc. In an alternative implementation, the communication device includes a baseband device and a radio frequency device. In another alternative implementation, the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module). The transceiver unit can realize a transmission function and a reception function, and may be referred to as a transmission unit (sometimes referred to as a transmission module) when the transceiver unit realizes the transmission function, and may be referred to as a reception unit (sometimes referred to as a reception module) when the transceiver unit realizes the reception function. The transmitting unit and the receiving unit may be the same functional module, which is called a transceiver unit, and which can implement a transmitting function and a receiving function; alternatively, the transmitting unit and the receiving unit may be different functional modules, and the transmitting and receiving unit is a generic term for these functional modules.

In an alternative embodiment, the processing unit is configured to determine configuration information, where the configuration information is used to configure a first resource pool and a plurality of feedback intervals associated with the first resource pool, and the first resource pool is used to send and or receive signals by the first terminal device; the receiving and transmitting unit (or the receiving unit) is configured to receive first sideline data at a first resource, where a time domain resource of the first resource includes a first time unit in the first resource pool; the processing unit is further configured to determine a target feedback interval, where the target feedback interval is one of the feedback intervals; the processing unit is further configured to determine a first feedback resource unit according to the position of the first resource and the target feedback interval, where the first feedback resource unit is located on a second time unit, and an interval between the second time unit and the first time unit is greater than or equal to the target feedback interval.

In an alternative embodiment, the communication apparatus further comprises a storage unit (sometimes also referred to as a storage module), the processing unit being configured to be coupled to the storage unit and execute a program or instructions in the storage unit, to enable the communication apparatus to perform the functions of the first terminal device according to any one of the first to second aspects.

In a fourth aspect, a communication device is provided. The communication means may be the second terminal device of any one of the first to second aspects above. The communication device has the function of the second terminal device. The communication means is for example a second terminal device, or a larger device comprising the second terminal device, or a functional module in the second terminal device, such as a baseband device or a system on chip, etc. In an alternative implementation, the communication device includes a baseband device and a radio frequency device. In another alternative implementation, the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module). Reference may be made to the description of the seventh aspect for implementation of the transceiver unit.

In an alternative embodiment, the processing unit is configured to determine configuration information, where the configuration information is used to configure a first resource pool and a plurality of feedback intervals associated with the first resource pool, and the first resource pool is used to send and or receive signals by the second terminal device; the transceiver unit (or the transmitting unit) is configured to transmit first sidestream data on a first resource, where a first time unit in the first resource pool includes a time domain resource of the first resource; the processing unit is further configured to determine a target feedback interval, where the target feedback interval is one of the feedback intervals; the processing unit is further configured to determine a first feedback resource unit according to the position of the first resource and the target feedback interval, where the first feedback resource unit is located on a second time unit, and an interval between the second time unit and the first time unit is greater than or equal to the target feedback interval.

In an alternative embodiment, the communication apparatus further comprises a storage unit (sometimes also referred to as a storage module), the processing unit being configured to be coupled to the storage unit and execute a program or instructions in the storage unit, to enable the communication apparatus to perform the functions of the second terminal device according to any one of the first to second aspects.

In a fifth aspect, a communication apparatus is provided, which may be a remote terminal device, or a chip or chip system for use in a remote terminal device. The communication device comprises a communication interface and a processor, and optionally a memory. Wherein the memory is configured to store a computer program, and the processor is coupled to the memory and the communication interface, and when the processor reads the computer program or instructions, the processor causes the communication device to perform the method performed by the first terminal device in the above aspects.

In a sixth aspect, a communication apparatus is provided, which may be a relay terminal device or a chip system for use in a relay terminal device. The communication device comprises a communication interface and a processor, and optionally a memory. Wherein the memory is configured to store a computer program, and the processor is coupled to the memory and the communication interface, and wherein the processor, when reading said computer program or instructions, causes the communication device to perform the method performed by the second terminal device in the above aspects.

A seventh aspect provides a communication system comprising a remote terminal device and a relay terminal device, wherein a first terminal device is adapted to perform the method performed by the first terminal device according to any of the first to second aspects, and a second terminal device is adapted to perform the method performed by the second terminal device according to any of the first to second aspects. For example, the first terminal device may be implemented by the communication apparatus described in the third aspect or the fifth aspect; the second terminal device may be implemented by the communication apparatus according to the fourth or sixth aspect.

In an eighth aspect, a computer readable storage medium is provided for storing a computer program or instructions that, when executed, cause a method performed by the first terminal device or the second terminal device in the above aspects to be implemented.

In a ninth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the method of the above aspects to be carried out.

In a tenth aspect, a chip system is provided, including a processor and an interface, where the processor is configured to invoke and execute instructions from the interface to cause the chip system to implement the methods of the above aspects.

Drawings

Fig. 1 is a schematic diagram of a format of a slot including a PSFCH;

fig. 2 is a schematic diagram of the location of a time slot including a PSFCH;

FIG. 3 is a schematic diagram of a network architecture used in the embodiments of the present application;

fig. 4 is a flowchart of a communication method provided in an embodiment of the present application;

FIG. 5A is a schematic diagram illustrating a position of a time unit for transmitting feedback information according to an embodiment of the present application;

FIG. 5B is a diagram of a second time unit in an embodiment of the present application, where the number of time units associated with the second time unit may be less than or equal to N ₁ Is a schematic diagram of (a);

fig. 6A and fig. 6B are two schematic diagrams of determining a feedback resource unit according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an apparatus according to an embodiment of the present application;

fig. 8 is a schematic view of yet another apparatus provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

In the embodiments of the present application, the number of nouns, unless otherwise indicated, means "a singular noun or a plural noun", i.e. "one or more". "at least one" means one or more, and "a plurality" means two or more. "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 alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. For example, A/B, means: a or B. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c, represents: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c may be single or plural.

The ordinal terms such as "first," "second," and the like in the embodiments of the present application are used for distinguishing a plurality of objects, and are not used to define a size, a content, an order, a timing, a priority, or an importance level of the plurality of objects. In addition, the numbers of the steps in the embodiments described in the present application are only for distinguishing different steps, and are not used for limiting the sequence of the steps. For example, S401 may occur before S402, or may occur after S402, or may also occur concurrently with S402.

In the following, some terms or concepts in the embodiments of the present application are explained for easy understanding by those skilled in the art.

In this embodiment of the present application, the terminal device is a device with a wireless transceiver function, and may be a fixed device, a mobile device, a handheld device (for example, a mobile phone), a wearable device, an on-board device, or a wireless apparatus (for example, a communication module, a modem, or a chip system) built in the above device. The terminal device is used for connecting people, objects, machines and the like, and can be widely used in various scenes, including but not limited to the following scenes: cellular communication, D2D, V X, machine-to-machine/machine-type communications, M2M/MTC), internet of things (internet of things, ioT), VR, AR, industrial control (industrial control), self-driving (self driving), remote medical (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation, smart city (smart city), drone, robot, and other scenarios. The terminal device may sometimes be referred to as a UE, a terminal, a client device (customer premise equipment, CPE), an access station, a UE station, a remote station, a wireless communication device, or a user equipment, among others. For convenience of description, in the embodiment of the present application, a UE is taken as an example to illustrate a terminal device.

The network device in the embodiment of the application comprises an access network device and/or a core network device, for example. The access network equipment is equipment with a wireless receiving and transmitting function and is used for communicating with the terminal equipment. The access network devices include, but are not limited to, base stations (base transceiver stations (base transceiver station, BTS), node B, eNodeB/eNB, or gNodeB/gNB), transceiver points (transmission reception point, TRP), base stations for subsequent evolution of the third generation partnership project (3rd generation partnership project,3GPP), access nodes in wireless fidelity (wireless fidelity, wi-Fi) systems, wireless relay nodes, wireless backhaul nodes, and the like. The base station may be: macro base station, micro base station, pico base station, small station, relay station, etc. Multiple base stations may support networks of the same access technology or may support networks of different access technologies. A base station may comprise one or more co-sited or non-co-sited transmission reception points. The access network device may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the context of a cloud radio access network (cloud radio access network, CRAN). The access network device may also be a server or the like. For example, the network device in the V2X technology may be a Road Side Unit (RSU). The following describes an access network device using a base station as an example. The base station may communicate with the terminal device or may communicate with the terminal device through the relay station. A terminal device may communicate with multiple base stations in different access technologies. The core network device is used for realizing the functions of mobile management, data processing, session management, policy and charging, etc. The names of devices implementing the core network function in the systems of different access technologies may be different, and the embodiments of the present application are not limited to this. Taking a 5G system as an example, the core network device includes: access and mobility management functions (access and mobility management function, AMF), session management functions (session management function, SMF), policy control functions (policy control function, PCF) or user plane functions (user plane function, UPF), etc.

In the embodiment of the present application, the communication device for implementing the function of the network device may be a network device, or may be a device capable of supporting the network device to implement the function, for example, a chip system, and the device may be installed in the network device. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the network device is exemplified by the network device, and the technical solution provided in the embodiments of the present application is described.

The technical solution provided in the embodiments of the present application may be applied to a fourth generation mobile communication technology (the 4th generation,4G) system, for example, an LTE system, or may be applied to a 5G system, for example, an NR system, or may also be applied to a next generation mobile communication system or other similar communication systems, for example, a sixth generation mobile communication technology (the 6th generation,6G) system, or the like, and is not specifically limited. The technical scheme provided by the embodiment of the application can be applied to D2D scenes, such as NR-D2D scenes and the like, or can be applied to V2X scenes, such as NR-V2X scenes and the like. For example, the method can be applied to the Internet of vehicles, such as V2X and the like, or can be applied to the fields of intelligent driving, auxiliary driving, intelligent network vehicle connection and the like. Or may be applied in a smart factory or industrial control scenario, such as communication between a controller and a transmission or between a controller and a sensor.

Technical features related to embodiments of the present application are described below.

In an NR system, a SL device may be configured with a bandwidth part (BWP) and a resource pool (resource pool) for determining a frequency domain resource that can be used by the SL device, where the time domain resource includes a time slot that can be used by the SL device and an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol that can be used in the time slot. For example, a certain SL device is configured with a SL resource pool comprising for example 6 sub-channels (sub-channels) in the frequency domain and resources with a period of 8 time slots in the time domain, wherein 6 time slots in each period can be used for SL transmission, as shown on the left side of fig. 1. Since not all slots can be used for SL transmission, the concept of logical slots can be introduced in one SL resource pool, one logical slot corresponding to one physical slot available for SL transmission, and the index of logical slots can be consecutive. Unless otherwise indicated herein, a slot is understood to be a logical slot when it occurs. In addition, the right side of fig. 1 is an illustration of a frame structure inside one slot. Taking the example that one slot contains 14 OFDM symbols, for example, starting from OFDM symbol 3, it is available for SL transmission. From which OFDM symbol in the slot is available for SL transmission, may be configured by a start side uplink symbol (startsymbols) parameter included in the configuration information of BWP. In SL, the subchannel is the minimum granularity on the frequency domain resource when the SL device transmits data, and the number of PRBs that one subchannel on the SL resource pool can contain can be configured by the resource pool configuration information, and the resource pool configuration information can be used to configure the SL resource pool.

The channels in SL mainly include physical side uplink control channels (physical sidelink control channel, PSCCH), physical side uplink shared channels (physical sidelink shared channel, PSSCH), physical side uplink feedback channels (physical sidelink feedback channel, PSFCH), and so on. The PSCCH may transmit side line control information 1 (sidelink control information, SCI 1), and SCI1 includes scheduling information on the PSSCH associated with the SCI1, e.g., information in the SCI1 that may indicate a time-frequency resource location of the PSSCH, a modulation coding scheme used for data in the PSSCH, and a priority corresponding to the data in the PSSCH. It can thus also be appreciated that SCI1 can schedule PSSCH. The PSSCH may transmit side row control information 2 (sidelink control information, SCI 2) and SL data. The SCI2 may include information such as the HARQ process number (or identifier) corresponding to the data on the PSSCH, the source Identity (ID) of the transmitting device, the destination ID of the receiving device, and so on. The PSFCH may transmit data hybrid automatic repeat (hybrid automatic repeat request, HARQ) feedback information. In one slot, the first OFDM symbol capable of performing SL transmission is generally referred to as an automatic gain control (automatic gain control, AGC) symbol, and may be used by the receiving end to adjust the amplification factor of the power amplifier at the receiving end and parameters of the analog-to-digital converter (analog to digital converter, ADC) according to the received power, for subsequent PSCCH and/or PSSCH reception. In one slot, PSCCH and PSSCH may be transmitted from the second OFDM symbol capable of SL transmission, PSCCH may occupy 2 or 3 symbols in time domain, and the number of OFDM symbols occupied may be configured by higher layer parameters; the PSCCH is generally mapped from the initial PRB position of one sub-channel in the frequency domain, and can occupy 10, 12, 15, 20 or 25 PRBs in total, and the number of the specifically occupied PRBs can be configured by a higher layer, so that the receiving end can perform blind detection on the PSCCH at some fixed positions, and generally the frequency domain resources occupied by the PSCCH cannot exceed one sub-channel. The time domain start position of the PSCCH is the same as the time domain start position of the PSCCH (in a special case, the PSCCH occupies an entire sub-channel and the PSCCH occupies only one sub-channel, it is understood that the time domain start position of the PSCCH is the same as the time domain start position of the PSCCH, but the PSCCH occupies 0 frequency domain sub-units, such as PRBs or subcarriers, at the time domain position of the PSCCH), the frequency domain start sub-channel and the sub-channel where the PSCCH is located are the same sub-channel, the PSCCH may be partially frequency division multiplexed with the PSCCH, the PSCCH may occupy one or more sub-channels in the frequency domain, and the number of occupied sub-channels may be indicated by SCI1 scheduling the PSCCH. In each slot, the last OFDM symbol used to perform SL transmission is typically not used to transmit any information, but is used as a GAP symbol for the SL device to complete the transmit-receive state transition.

The resource pool configuration information may also contain configuration information of the PSFCH, e.g. including the period in which the PSFCH occurs, i.e. every how many slots a slot containing the PSFCH will occur. The configuration of the Period, e.g. denoted P, by a side-link PSFCH Period (sl-PSFCH-Period) parameter included in the resource pool configuration information indicates that a time slot containing PSFCH resources will occur every P time slots. The period is understood as the period of a logical time slot, i.e. every other logical time slot a logical time slot containing a PSFCH occurs. When the PSFCH is contained in a slot, the PSFCH may occupy the second last OFDM symbol in the slot, and the two OFDM symbols preceding the OFDM symbol in which the PSFCH is located may be respectively the GAP symbol and the AGC symbol, for which reference may be continued with respect to fig. 1. In this context, when a PSFCH is configured in a slot, the slot may be referred to as a PSFCH slot or a feedback slot. The resource pool configuration information may indicate which PRBs on the OFDM symbol occupied by the PSFCH are available for PSFCH transmission, and there is also an explicit mapping relationship between the PSFCH and the PSSCH, and the receiving device of the PSSCH may determine one PRB for transmitting the PSFCH according to the mapping relationship. The mapping relation is mainly determined by two parameters, one is the period P in which the above-mentioned PSFCH occurs, and the other is the minimum time interval between the PSSCH and its mapped PSFCH, which is configurable by a sideline minimum time interval PSFCH (sl-MinTimeGapPSFCH) parameter included in the resource pool configuration information. The minimum time interval may characterize a minimum interval to be satisfied between a slot in which the PSSCH is located and a slot in which the PSFCH for transmitting feedback information of the PSSCH is located, and the unit of the minimum time interval may be a slot. The purpose of setting the minimum time interval is mainly to take into account that the receiving device needs to perform demodulation of the PSSCH and generate feedback information on the PSFCH, and a certain processing time is required, so that a certain time interval is required between the PSSCH and the PSFCH. That is, after receiving the PSSCH, one SL device may transmit the PSFCH on the first slot that contains the PSFCH and is at least the minimum time interval from the last slot of the PSSCH, which is also understood as the number of slots contained in the resource pool in the interval, i.e., the time interval is represented by the number of logical slots contained. As shown in fig. 2, when p=4, PSFCH is included in the slots of slot 0, slot 4, slot 8, slot 12, etc. (where slot 0 and slot 12 are not shown in fig. 2), that is, the slots of slot 0, slot 4, slot 8, slot 12, etc. are PSFCH slots. In addition, the SL-MinTimeGapPSFCH configures a minimum time interval to be 2 slots, taking slot 8 as an example, the PSFCH in slot 8 and its corresponding PSSCH need to satisfy the interval of at least two slots, so the PSFCH in slot 8 may correspond to the PSSCH in slots 3-6, or if an SL device receives the PSSCH in any one of slots 3-6, the SL device may send Acknowledgement (ACK)/Negative Acknowledgement (NACK) information on the PSFCH in slot 8. Similarly, PSFCH in slot 12 corresponds to PSSCH in slots 7-10, and so on.

The resource pool configuration information may configure one or more PRBs available for transmission of the PSFCH for OFDM symbols used to carry the PSFCH in the PSFCH slot, e.g., may be configured by a side-uplink PSFCH resource block Set (sl-PSFCH-RB-Set) parameter included in the resource pool configuration informationThe PRBs are used for transmitting PSFCH.

The index of these PRBs can be noted asFor example, the small boxes in slot 4 and slot 8 in fig. 2 represent PRBs used for transmitting the PSFCH. Further, a PRB included in a PRB set used for transmitting a PSFCH on one PSFCH slot may have a mapping relationship with a slot and a subchannel associated with the PSFCH slot. For example, according to the description above, slot 8 in fig. 2 is a feedback slot, which may be associated with slots 3-6, so that the PRB set used for transmitting PSFCH on slot 8 may be mapped with slots 3-6 and the subchannels on these slots. For example, there are 8 PRBs for transmitting PSFCH on slot 8, and when the resource pool includes 2 subchannels, there are 4 slots and 2 subchannels on slot 3 to slot 6, and 8 data transmission resource units are formed in total (one data transmission resource unit includes one slot in the time domain and one subchannel in the frequency domain), so one data transmission resource unit may correspond to one PRB for transmitting PSFCH on slot 8 according to the above configuration, e.g., PRB0 on slot 8 is mapped to slot 3 subchannel 0, PRB1 on slot 8 is mapped to slot 4 subchannel 0, and so on. The SL device can determine the time slots and sub-channels included in the PSSCH based on the transmitted or received PSSCH, and then determine the time slots and sub-channels (e.g., the first time slot and the first sub-channel, or all the time slots Slots and all sub-channels) find the corresponding one or more PRBs, and then determine one PRB from the PRBs as the PRB for transmitting or receiving the PSSCH corresponding to the PSFCH. Finally, when the UE uses different time slots or different sub-channels to transmit data, the corresponding feedback resources are also different, so that the conflict of the feedback resources can be avoided.

For example, the number of PRBs associated with the PSSCH may be determined to be F by the above procedure, and further, the SL device may determine, according to the resource pool configuration information, that the number of cyclic shift pairs (cyclic shift pair) that may be used in the sequence used for transmitting the PSFCH is G, and then may determine f×g PSFCH resources in total. Wherein, the PSFCH resource includes both time-frequency resources (i.e., F PRBs) and code domain resources (i.e., G cyclic shift pairs). SL equipment is further controlled according to (P _ID +M _ID ) The value of mod (FxG) determines the corresponding PSFCH resource from the FxG PSFCH resources. Wherein P is _ID Determined by the source ID carried in PSSCH, M _ID Set to 0 or determined according to the group ID of the higher layer configuration. One PSFCH resource may be used to transmit either ACK or NACK information, and the specific transmitted information may be determined based on the decoding result of the SL device for the received PSSCH.

Currently, the minimum time interval supported in the resource pool configuration information is typically set to 2 or 3 slots, which mainly takes into account the processing power of the current device. However, in future industrial scenarios, there are many services requiring extremely short transmission delays (e.g., 1-2 ms), and when the subcarrier spacing is 15kHz, a feedback interval of 1ms,2 or 3 slots may result in insufficient time for retransmission within the delay tolerance range. Thus, to meet the above traffic demands, it may be necessary to configure a shorter minimum time interval, for example, to allow setting the minimum time interval to one slot or 0 slots (i.e., feedback within the same slot). Since the minimum time interval is configured by the resource pool configuration information, it can be regarded as a system level configuration, which is shared by SL devices using the same SL resource pool. Then, in order to reduce the transmission delay of some traffic with higher delay requirements, a smaller minimum time interval needs to be configured for the SL resource pool, and even if the delay requirements of some traffic are not high, SL devices need to execute at the smaller minimum time interval, which requires faster PSSCH processing capability and PSFCH packetization capability of these devices, and increases the cost of devices without low delay requirements.

In view of this, a technical solution of the embodiments of the present application is provided. In the embodiment of the present application, a plurality of feedback intervals may be associated with the first resource pool, and two UEs may select an appropriate feedback interval from the feedback intervals during communication (the selected feedback interval is referred to as a target feedback interval), where the target feedback interval can satisfy the capabilities of the two UEs and the delay requirement corresponding to a specific service. By associating a plurality of feedback intervals for a resource pool, different devices using the resource pool are enabled to select respective suitable feedback intervals. For example, if the service executed by the UE has a higher requirement on the delay, the UE may select a feedback interval with a smaller value as the target feedback interval to meet the delay requirement of the service; if the service executed by the UE has low requirement on time delay, the UE can select a feedback interval with a larger value as a target feedback interval, so that the time delay requirement of the service can be met, the capability of the UE cannot be excessively high, and the cost of the UE can be reduced. Therefore, by adopting the scheme of the embodiment of the application, the time delay requirements of different services can be met.

Referring to fig. 3, a communication network architecture suitable for embodiments of the present application is shown. Fig. 3 includes a first UE and a second UE between which SL communication may take place. The second UE may send SL data to the first UE, and the first UE may send feedback information of the SL data to the second UE. In addition, fig. 1 also includes an access network device, which may, for example, configure the first resource pool to the first UE and/or the second UE. Alternatively, the first resource pool may not be configured by the access network device, e.g. preconfigured in the first UE or the second UE, or configured for the first UE and/or the second UE by other UEs or other network devices than the access network device (e.g. core network device, etc.).

In the embodiment of the present application, the SL may be referred to as "side-link", for example, the SL information may be referred to as side-link information, and the SL data may be referred to as side-link data, etc. Alternatively, the SL may be simply referred to as "side line", for example, the SL information may be simply referred to as side line information, and the SL data may be simply referred to as side line data, or the like, which will be described later as an example.

In the present embodiment, the "feedback interval" is, for example, a "minimum feedback interval". For example, if one UE (or both communication parties) selects a certain feedback interval as the target feedback interval, the UE (or both communication parties) may communicate at a feedback interval greater than or equal to the target feedback interval. The unit of the feedback interval may be a time unit.

In this embodiment of the present application, the time unit is, for example, a subframe (subframe), and the sub-time unit is, for example, a slot, a mini-slot, or an OFDM symbol; alternatively, the time units are time slots, and the sub-time units are mini time slots or OFDM symbols; alternatively, the time units are e.g. mini-slots, and the sub-time units are e.g. OFDM symbols or the like. The frequency domain unit is, for example, a subband, a subchannel (sub-channel), a carrier, or the like. The feedback resource units are, for example, PRBs for transmitting feedback information. The X-th resource may be defined by a time unit and a frequency domain unit. For example, the time domain resource of the first resource may include a first time unit and the frequency domain resource of the first resource may include a first frequency domain unit. It is to be appreciated that the time domain resources of the first resource may include other time units in addition to the first time unit and the frequency domain resources of the first resource may include other frequency domain units in addition to the first frequency domain unit. For example, the first resource is a resource for SL data transmission, the first resource may include one or more time slots in the time domain, the first time unit may include one or more sub-channels in the frequency domain, and the first frequency domain unit may include one of the sub-channels. The embodiments of the present application are mainly described by taking an example that the first resource includes one time unit in the time domain and includes one or more frequency domain units in the frequency domain.

In order to better describe the embodiments of the present application, the methods provided by the embodiments of the present application are described below with reference to the accompanying drawings. In the drawings corresponding to the embodiments of the present application, the steps indicated by the dotted lines are optional steps unless specifically described later. The methods provided by the embodiments of the present application may be applied to the network architecture shown in fig. 3, for example, the first UE involved in the methods provided by the embodiments of the present application may be the first UE in fig. 3, the second UE involved in the methods provided by the embodiments of the present application may be the second UE in fig. 3, and the access network device involved in the methods provided by the embodiments of the present application may be the access network device in fig. 3.

Referring to fig. 4, a flowchart of a communication method according to an embodiment of the present application is shown.

S401, the second UE determines configuration information. The configuration information may be used to configure the first resource pool and to configure a plurality of feedback intervals associated with the first resource pool. For example, the configuration information may include a list configured for the first resource pool, e.g., a list called a side uplink time interval PSFCH (sl-TimeGapPSFCH) list, which may include a plurality of feedback intervals. I.e. the first resource pool may support multiple feedback intervals. Or the configuration information may configure two feedback intervals to determine a range of feedback intervals, all feedback intervals in the range of feedback intervals being associated with the first resource pool.

The first resource pool is, for example, a SL resource pool, and the second UE may transmit and/or receive signals, for example, to communicate with other UEs, using the first resource pool. E.g., the second UE is operating in mode (mode) 2, the second UE may select SL resources in the first resource pool to send SL information to other UEs. For example, the configuration information may configure the second UE with one or more SL resource pools, the first resource pool being, for example, one of the one or more SL resource pools. For each of the one or more SL resource pools, the configuration information may configure one or more feedback intervals for each of the one or more SL resource pools, the number of feedback intervals configured for different SL resource pools may be the same or different, and the feedback intervals configured for different SL resource pools may or may not have intersections.

The configuration information may be preconfigured in the second UE, for example, when the second UE leaves the factory; or, the configuration information may come from an access network device, for example, the access network device configures a SL resource pool and a feedback interval for the second UE, and sends the configuration information to the second UE, where the configuration information may be transmitted through a direct connection path between the second UE and the access network device, and the second UE receives the configuration information from the access network device, or may also be transmitted through a non-direct connection path between the second UE and the access network device, and the second UE receives the configuration information from a relay UE, where the relay UE is, for example, a first UE or other UEs, and the second UE receives the configuration information and determines the configuration information; alternatively, the SL resource pool and the feedback interval may also be configured for the second UE by other UEs (e.g., the first UE or other UEs other than the first UE), where the configuration information may be from other UEs, e.g., the other UEs send the configuration information to the second UE, and where the second UE receives the configuration information and determines the configuration information; alternatively, the second UE may configure the SL resource pool and the feedback interval by itself, and the second UE may determine the configuration information.

Optionally, the configuration information may further configure a feedback period, where the feedback period is a period of a time unit including a feedback resource unit, for example, a period of a time unit including a PSFCH. In the embodiment of the present application, the feedback period may be understood as the number of time units included in one feedback period. For example, the feedback period of the configuration information configuration is P, which indicates that there may be one time unit including the PSFCH every P time units. Taking fig. 2 as an example, for example, the feedback period P configured by the configuration information is 4 slots, it indicates that there may be one slot including the PSFCH in every 4 slots. Slots such as slot 0 (not shown), slot 4, and slot 8 are slots that include the PSFCH.

Optionally, the configuration information may further configure feedback resource units available for transmitting the PSFCH on sub-time units including the time units used for transmitting the PFSCH in the PSFCH, and the number of the feedback resource units may be one or more. For example, the configuration information may be configured in manner a or configured in manner B.

Alternatively, the second UE may determine, on a time unit including the PSFCH, a sub-time unit including the PSFCH feedback resource unit according to a predefined rule, for example, in fig. 1, when one slot is a PSFCH slot, the penultimate symbol is a symbol (i.e., a sub-time unit) for transmitting the PSFCH among all symbols for the sidlink transmission in the slot. Wherein the third last symbol is the AGC symbol of the PSFCH over which the UE may transmit repetitions of the signal on the PSFCH symbol when transmitting the PSFCH.

Mode a, the configuration information may configure a set of feedback resource units, the set of feedback resource units comprising one or more feedback resource units. Alternatively, the configuration information may configure the Set of feedback resource elements through an sl-PSFCH-RB-Set parameter. For example, the set of feedback resource units includes M ₁ Feedback resource units, M ₁ The feedback resource units are feedback resource units available for transmission of the PSFCH on sub-time units used for transmission of the PFSCH within the time unit including the PSFCH. For example, the M ₁ The indexes of the feedback resource units are respectively 0-M ₁ -1。

Mode B: the configuration information may configure a correspondence between a plurality of feedback resource unit sets (e.g., index sets of feedback resource units) and a plurality of feedback intervals, e.g., feedback resource unit sets and feedback intervals in a one-to-one correspondence. Each set of feedback resource units may include one or more feedback resource units (e.g., an index including one or more feedback resource units), and different sets of feedback resource units may not have intersections. All feedback resource units included in the plurality of feedback resource unit sets may be all or part of feedback resource units on a sub-time unit for transmitting the PSFCH on the second time unit, which may be understood as dividing all or part of feedback resource units on the sub-time unit for transmitting the PSFCH on the second time unit into a plurality of feedback resource unit sets, so that the plurality of feedback resource unit sets correspond to a plurality of feedback intervals.

In addition, the configuration information may further include configuration information of time resources and/or frequency domain resources within the first resource pool. For example, the configuration information includes a slot index in the first resource pool that is available for SL transmission, and is used to determine logical slots in the first resource pool; and/or, the configuration information may include one or more of: configuration information of a plurality of OFDM symbols available for SL transmission in each slot in the first resource pool, configuration information of one or more subchannels in the first resource pool, or the number of PRBs included in each subchannel in the first resource pool, etc. For a specific description of these configuration information reference is made to the description of SL in the foregoing.

S402, the first UE determines configuration information. The configuration information may be used to configure the first resource pool and to configure a plurality of feedback intervals associated with the first resource pool.

The first resource pool is, for example, a SL resource pool, with which the first UE may transmit and/or receive signals, e.g., communicate with other UEs. For example, the first UE may monitor SL information from other UEs in the first resource pool. For example, the configuration information may configure the first UE with one or more SL resource pools, for which reference may be made to the description of S401.

In addition, regarding the manner of determining the configuration information by the first UE, the manner of determining the configuration information by the second UE in S401 may also be referred to.

Optionally, in the configuration information determined by the first UE and the configuration information determined by the second UE, a plurality of feedback intervals associated with the first resource pool are the same.

Wherein S401 may occur before S402, or after S402, or simultaneously with S402.

S403, the second UE transmits the first SL data on the first resource. Accordingly, the first UE receives the first SL data at the first resource.

The second UE may select SL resources from the first resource pool to transmit the first SL data, e.g., the second UE selects the first resources. The time domain resources of the first resource comprise a first time unit within a first resource pool. Or the second UE determines SL resources from the first resource pool according to the indication of the network device to transmit the first SL data.

Alternatively, if the first resource time domain includes a plurality of time units, the first time unit may be a first time unit or a last time unit of the plurality of time units.

Alternatively, the first resource may comprise one or more frequency domain units in the frequency domain, e.g. the first resource may comprise one or more sub-channels in the frequency domain.

Alternatively, the second UE may send sidelink control information associated with the first SL data, e.g., in such a way that the sidelink control information is used to schedule the first SL data. The side control information is, for example, an SCI, such as a first-order SCI, which may be carried in a PSCCH, where a start time domain position of the PSCCH is the same as a start time domain position of the first SL data, refer to fig. 1, or the start time domain position of the PSCCH may be earlier than the start time domain position of the first SL data; alternatively, the SCI is a second-level SCI, which may be carried in the PSSCH, without limitation.

Alternatively, the side-row control information may include information of the first resource (or indication information of the first resource), for example, the side-row control information indicates the first resource through a time resource allocation (time resource assignment, TRA) field and a frequency resource allocation (frequency resource assignment, FRA) field in the first-order SCI. Alternatively, the sidestream control information may be used to schedule both the initial transmission and the retransmission of the first SL data, and then the sidestream control information may include information of resources used for the initial transmission and information of resources used for the retransmission. The first SL data transmitted in S403 may be primary transmission data or retransmission data, and thus the first resource may be a portion of the resource scheduled by the sidelink control information. For example, the bypass control information may include information of a third resource, the third resource including the first resource, and thus the bypass control information also includes information of the first resource.

Optionally, the sidestream control information may include information of a first priority, where the first priority is a priority corresponding to the first SL data.

Optionally, the sidestream control information may include information of a first HARQ process identifier, where the first HARQ process identifier is a HARQ process identifier corresponding to the first SL data.

S404, the first UE determines a target feedback interval.

S405, the second UE determines a target feedback interval.

Since S404 and S405 are associated with each other, the following description is given to these two steps in a unified manner.

The first resource is a resource within the first resource pool, and thus the first UE may determine one feedback interval from a plurality of feedback intervals associated with the first resource pool as the target feedback interval. The first UE may determine the target feedback interval in a number of ways, as described by way of example below.

1. The first way of determining the target feedback interval.

The first UE and or the second UE may determine a larger value of the first feedback interval and the second feedback interval as the target feedback interval. The first feedback interval is a feedback interval supported by the first UE, the second feedback interval is a feedback interval supported by the second UE, and the first feedback interval and the second feedback interval both belong to a plurality of feedback intervals supported on the first resource pool.

Optionally, S404a and S404b are further included before step S404.

S404a, the first UE sends first capability information to the second UE. Accordingly, the second UE receives the first capability information from the first UE. The first capability information indicates a feedback intervals of the plurality of feedback intervals, the a feedback intervals belonging to a feedback intervals supported by the first resource pool.

S404b, the second UE sends second capability information to the first UE. Accordingly, the first UE receives second capability information from the second UE. The second capability information indicates B feedback intervals of the plurality of feedback intervals, the B feedback intervals belonging to B feedback intervals supported by the first resource pool.

When only one feedback interval is allowed to be reported in the first capability information and/or the second capability information, for example, when a=1 and b=1, the 1 feedback interval included in the first capability information may be understood as the smallest feedback interval that the first UE can support, i.e. the first feedback interval; the 1 feedback interval included in the second capability information may be understood as the smallest feedback interval that the second UE can support, i.e., the second feedback interval. The first UE and the second UE determine larger values of the first feedback interval and the second feedback interval, which is equivalent to determining, among the feedback intervals supported by the first resource pool, a minimum feedback interval that can be supported by both UEs as a target feedback interval.

When reporting of one or more feedback intervals is allowed in the first capability information and/or the second capability information, for example, a > =1, B > =1, a feedback intervals included in the first capability information may be understood as a feedback intervals that the first UE can support, and B feedback intervals included in the second capability information may be understood as B feedback intervals that the second UE can support. The first UE determines a first feedback interval according to the minimum value of A feedback intervals supported by the first UE, and determines a second feedback interval according to the minimum value of B feedback intervals in the second capability information; similarly, the second UE determines a second feedback interval from a minimum of the B feedback intervals supported by the second UE, and determines a first feedback interval from a minimum of the a feedback intervals in the first capability information. The first UE and the second UE determine the minimum feedback interval which can be supported by both the UE from a plurality of feedback intervals supported by the first resource pool as a target feedback interval according to larger values of the first feedback interval and the second feedback interval.

Optionally, the first UE and the second UE may determine a smallest feedback interval in the first feedback interval set as the target feedback interval, where the first feedback interval set is an intersection of a set of a feedback intervals included in the first capability information and a set of B feedback intervals included in the second capability information. In this manner, the first UE and the second UE determine a minimum feedback interval from one or more feedback intervals supported by both as a target feedback interval. In particular, when the intersection is an empty set, the first UE and the second UE may take a default feedback interval as a target feedback interval, for example, the target feedback interval is a feedback interval with a maximum value among a plurality of feedback intervals associated with the first resource pool.

In the first manner, the first UE and the second UE indicate respective supported feedback intervals by transmitting capability information to each other, and then each determines a target feedback interval according to the capability between the two UEs, but since the determined rule is uniform, the target feedback intervals determined by the two UEs are the same. By the method, on one hand, the target feedback interval determined by the first UE and the second UE can be realized by both the first UE and the second UE, and on the other hand, the target feedback interval can be as small as possible, so that the UE can feed back faster, and the feedback time delay is reduced.

2. A second way of determining the target feedback interval.

Alternatively, the second manner may include S404b described above.

Optionally, the second manner may include S404c: the first UE transmits first information to the second UE, the first information being used to indicate a target feedback interval, the second UE receives the first information from the first UE, and determines the target feedback interval according to the first information.

In this manner, the first UE determines a target feedback interval according to one or more feedback intervals supported by the first UE and second capability information of the second UE, and transmits first information to the second UE, the first information may indicate the target feedback interval. The second UE may determine the target feedback interval based on the first information without the second UE having to perform further procedures to determine the target feedback interval.

For example, the first UE may determine the target feedback interval in the first manner as described above, except that the second UE need not determine the target feedback interval in the first manner as described above, but rather the first UE may send the first information to the second UE indicating the target feedback interval. Alternatively, the first UE may determine the target feedback interval in other ways than the first way as above, and then send the first information to the second UE to indicate the target feedback interval. For example, the first UE may select one feedback interval from the intersection of a feedback intervals and B feedback intervals as the target feedback interval. The first UE is to determine a target feedback interval from an intersection of a feedback intervals and B feedback intervals. The method for specifically determining the target feedback interval by the first UE is not limited in the embodiment of the present application.

3. A third way of determining the target feedback interval.

Optionally, the third mode may include S404a described above.

Optionally, the third mode may include S404d: the second UE transmits first information to the first UE, the first information being used to indicate a target feedback interval, the first UE receiving the first information from the second UE and determining the target feedback interval based on the first information.

In this manner, the second UE determines a target feedback interval according to one or more feedback intervals supported by the second UE and first capability information of the first UE, and transmits first information to the first UE, which may indicate the target feedback interval. The first UE may determine the target feedback interval based on the first information without the first UE having to perform further procedures to determine the target feedback interval.

For example, the second UE may determine the target feedback interval in the first manner as described above, except that the first UE need not determine the target feedback interval in the first manner as described above, but rather the second UE may send the first information indicating the target feedback interval to the first UE. Alternatively, the second UE may determine the target feedback interval in other ways than the first way as above, and then send the first information to the first UE to indicate the target feedback interval. For example, the second UE may select one feedback interval from the intersection of a feedback intervals and B feedback intervals as the target feedback interval. The second UE is to determine a target feedback interval from an intersection of a feedback intervals and B feedback intervals. The method for specifically determining the target feedback interval by the second UE is not limited in the embodiment of the present application.

Alternatively, the first information in the second or third manner may be a radio resource control (radio resource control, RRC) message, or the first information may be included in an RRC message.

Optionally, when determining the target feedback interval in the second manner or the third manner, the first UE may further detect whether the source ID in the sidestream control information matches the source ID of the second UE, thereby determining second information associated with the second UE. Wherein the sidestream control information is associated with or used to schedule the first SL data. For example, the first UE may receive data from the second UE or may receive data from the third UE, and then the first UE may configure first information a with the second UE, and may configure first information b with the third UE, where the target feedback intervals indicated in the first information a and the first information b may be the same or different. When the first UE receives a sideline control message, a source ID in the sideline control message may be identified first, a second UE or a third UE is determined as a transmitting end of the sideline control message according to the source ID, and then a target feedback interval is determined according to the first information a or the first information b and the steps.

4. A fourth way of determining the target feedback interval.

Optionally, the fourth manner may include S404e: the first UE sends second information to the second UE, and correspondingly, the second UE receives the second information from the first UE; or the second UE sends the second information to the first UE, and correspondingly, the first UE receives the second information from the second UE. S404e may occur before or concurrently with the second UE transmitting the sidestream control information.

Wherein the second information may include an association relationship between one or more of SL HARQ process identification, information of priority, or information of resources and a feedback interval. That is, in the second information, one feedback interval may be associated with one or more of SL HARQ process identification, priority, or resource. For example, the second information may include one or more of the following: x is X ₁ Individual SL HARQ process identification and X ₁ Correlation between feedback intervals, X ₂ Priority and X ₂ Correlation between feedback intervals, X ₃ Resource and X ₃ Correlation between feedback intervals, X ₄ Combining and X of individual SL HARQ process identities and priority formations ₄ Correlation between feedback intervals, X ₅ Combination and X of individual SL HARQ process identities and resource formations ₅ Correlation between feedback intervals, X ₆ Combination of individual priorities and resource formations and X ₆ The association relationship between the feedback intervals, or X ₇ Combining and X of individual SL HARQ process identities, priorities, and resource formations ₇ Association between feedback intervals. Wherein the second information includes resources ofIn the resource for transmitting SL data, for example, a periodic resource, the resource for transmitting the first SL data may be a resource in one period of the periodic resource. Wherein X is ₁ 、X ₂ 、X ₃ 、X ₄ 、X ₅ 、X ₆ 、X ₇ Are all positive integers, and the values can be the same or different.

Optionally, the resources included in the second information may be indicated by one or more of: the time domain offset of the resource, the time domain period of the resource, the frequency domain starting position of the resource, or the number of frequency domain units occupied by the resource in the frequency domain. Wherein the time domain offset of the resource is, for example, a time offset of the resource with respect to the 0 th frame (frame), and the unit is, for example, a time unit. The frequency domain starting position of a resource is for example an index of the starting frequency domain unit of the resource.

Alternatively, the second information may be a radio resource control (radio resource control, RRC) message, or the second information may be included in an RRC message.

Optionally, the first UE and the second UE may execute S404a and/or S404b before executing S404e, that is, the first UE or the second UE may configure the association relationship in the second information according to one or more feedback intervals included in the capability information reported by the UE and the peer UE.

In this manner, as described in S403, the second UE transmits sidestream control information to the first UE, which sidestream control information may schedule the first SL data, which sidestream control information may include third information, from which the first UE may determine the target feedback interval. For example, the third information may include one or more of SL HARQ process identification, priority information, or resource information, and the first UE may determine a feedback interval associated with the third information in combination with the second information, the feedback interval being the target feedback interval.

For example, the third information includes a first SL HARQ process identification, and the first UE determines that the first SL HARQ process identification is associated with a third feedback interval according to the second information, and then the first UE may determine the third feedback interval as the target feedback interval. Or, the third information includes information of the first priority, and the first UE determines that the first priority is associated with the third feedback interval according to the second information, and then the first UE may determine that the third feedback interval is the target feedback interval. Or, the third information includes information of the first resource, and the first UE determines that the first resource is associated with the third feedback interval according to the second information (for example, the second information includes an association relationship between the third resource and the third feedback interval, where the third resource is a periodic resource and the first resource is a resource of the third resource in a certain period), and then the first UE may determine that the third feedback interval is the target feedback interval. Or, the third information includes the first priority information and the first SL HARQ process identifier, and the first UE determines, according to the second information, that a combination of the first priority and the first SL HARQ process identifier is associated with the third feedback interval, so that the first UE may determine that the third feedback interval is the target feedback interval, and so on, which is not repeated.

In a fourth manner, a target feedback interval may be determined for the second UE (e.g., the second UE may determine the target feedback interval in the first manner as above, or otherwise determine the target feedback interval, e.g., the second UE may determine any one of the intersection of a feedback intervals and B feedback intervals as the target feedback interval), e.g., the second UE determines a third feedback interval of the plurality of feedback intervals associated with the first resource pool as the target feedback interval. After determining the target feedback interval, the second UE may determine third information associated with the target feedback interval according to the second information. After determining the third information, the second UE may send sidestream control information to the first UE, where the sidestream control information includes the third information, and the third information may be used by the first UE to determine the target feedback interval according to the second information.

Or the second UE/the first UE determines different feedback intervals according to the requirements of different services, then associates the different services with at least one of priority, HARQ process identification and resources, thereby determining second information, and then sends the second information to the first UE/the second UE. And then, when the second UE sends SL data to the first UE, carrying the third information in the SCI, and determining a target feedback interval by the first UE according to the association relation configured in the second information and at least one of the priority, the HARQ process identifier and the resource carried in the third information.

Optionally, the first UE may further detect whether the source ID in the sidestream control information matches the source ID of the second UE, thereby determining second information associated with the second UE. For example, the first UE may receive data from the second UE or may receive data from the third UE, and the second information a may be configured between the first UE and the second UE, and the second information b may be configured between the first UE and the third UE. When the first UE receives a sideline control message, a source ID in the sideline control message may be identified first, a second UE or a third UE is determined as a transmitting end of the sideline control message according to the source ID, and then a target feedback interval is determined according to the second information a or the second information b and the steps.

5. A fifth way of determining the target feedback interval.

In S403, or before S403, the second UE transmits sidestream control information to the first UE, which sidestream control information may schedule the first SL data. In addition, the sidelink control information may be used to indicate the target feedback interval in addition to scheduling the first SL data. The first UE determines a target feedback interval after receiving the sidelink control information. The implementation of this sideways control information may be referred to as described in the fourth way above.

For example, the second UE may determine the target feedback interval in the first manner as described above, e.g., the first UE and the second UE may perform S404a before performing S403, i.e., the second UE may determine the target feedback interval corresponding to the first SL data according to the feedback interval or intervals included in the capability information reported by the first UE and itself. Alternatively, the second UE may determine the target feedback interval in other ways than the first way as above, and then send the sidestream control information to the first UE to indicate the target feedback interval. For example, the second UE may select one feedback interval from the intersection of a feedback intervals and B feedback intervals as the target feedback interval.

Of the above five manners, the configuration of the first manner, the second manner, and the third manner is relatively simple, and the fourth manner and the fifth manner are slightly more complicated in process, but the target feedback interval may be more dynamically indicated, and different target feedback intervals may be determined between the first UE and the second UE for different SL data.

S406, the first UE determines a first feedback resource unit according to the position of the first resource and the target feedback interval.

The first feedback resource unit may be used to transmit feedback information of the first SL data, e.g., SL HARQ ACK or SL HARQ NACK. The first UE may first determine a time unit for transmitting the feedback information to determine the first feedback resource unit. Wherein the step of determining the time unit may occur before S406, or it may also be considered that S406 includes the step of determining the time unit.

For example, the first UE may determine at least one time unit in the first resource pool according to the feedback period, which may be used for transmitting the feedback information. It is understood that the first UE determines the location of the time units that can be used for transmitting the feedback information according to the feedback period, e.g. the first UE determines at least one time unit comprising the PSFCH (each of the at least one time units comprising the PSFCH). The first UE may determine a second time unit from at least one time unit according to the first time unit and the target feedback interval, where the second time unit is a time unit determined by the first UE and used for transmitting feedback information of the first SL data. For example, the second time unit is a first time unit located after the first time unit and spaced from the first time unit by a distance greater than or equal to the target feedback interval. For example, referring to fig. 5A, taking a time unit as an example of a time slot, the feedback period configured by the configuration information is 4, and in the first resource pool, time slots 0, 4, and … … are time slots including the feedback resource unit, that is, at least one time unit includes time slot 0, 4, and 8 … …. Wherein time slot 0 is not shown in fig. 5A. For example, if the first time unit in which the first SL data is located is slot 3 and the first UE determines that the target feedback interval is 2 slots, then the first slot, which is located after slot 3 and has a time interval greater than or equal to the target feedback interval with slot 3, among slot 0, slot 4, and slot 8 … … is slot 8, so the first UE determines that the second time unit is slot 8.

Alternatively, if the first resource pool includes time slots that are non-consecutive in time, the first UE may number these non-consecutive time slots by logical time slots. The first UE determines at least one logical time slot that may be used for transmitting feedback information according to the feedback period, and determines a physical time slot for transmitting feedback information according to a correspondence between the at least one logical time slot and the physical time slot.

After determining the second time unit, the first UE may determine a time unit associated with the second time unit. In this embodiment of the present application, according to different implementation manners of the configuration information, the first UE may determine the time unit associated with the second time unit in different manners, and due to the different manners, the process of determining the first feedback resource unit may also be affected, as described below.

When the configuration information is implemented in the manner a described in S401, the first UE may determine, according to the second time unit and the multiple feedback intervals associated with the first resource pool, a time unit associated with the second time unit, and further determine the first feedback resource unit. For example, the first UE may determine a time unit associated with the second time unit based on the second time unit and the plurality of feedback intervals associated with the first resource pool, e.g., the number of determined time units is N ₁ N, N ₁ For example, a positive integer greater than or equal to the feedback period. For example, if one time unit (referred to as a third time unit) is located before the second time unit, the interval between the third time unit and the second time unit is greater than or equal to the fourth feedback interval, and the interval between the third time unit and the second time unit is less than the fourth feedback interval plus the feedback period, then N ₁ The time units may include a third time unit, N if the third time unit does not satisfy the above condition ₁ The time units do not include a third time unit. The fourth feedback interval may be any one of a plurality of feedback intervals associated with the first resource pool.

The above-described process can also be understood as a process,the number of the plurality of feedback intervals associated with the first resource pool is L (in this application, L is an integer greater than or equal to 2), and the L feedback intervals are respectively K ₁ ,K ₂ ,…,K _L The index of the second time unit is for example n and the feedback period is for example P. For feedback interval K ₁ The first UE may determine a partial time unit associated with the second time unit, e.g., at feedback interval K ₁ The index set of the time unit associated with the second time unit is [ n-K ] ₁ –P+1，n–K ₁ ]The method comprises the steps of carrying out a first treatment on the surface of the For feedback interval K ₂ The first UE may determine a partial time unit associated with the second time unit, e.g., at feedback interval K ₂ The index set of the time unit associated with the second time unit is [ n-K ] ₂ –P+1，n–K ₂ ]The method comprises the steps of carrying out a first treatment on the surface of the … …, similarly, for feedback interval K _L The first UE may determine a partial time unit associated with the second time unit, e.g., at feedback interval K _L The index set of the time unit associated with the second time unit is [ n-K ] _L –P+1，n–K _L ]For other feedback intervals, the first UE may determine the time unit associated with the second time unit in a similar manner, which is not repeated. It can be seen that the time units corresponding to each index set include time units associated with the second time units determined from the feedback intervals when the first resource pool is configured with only the feedback intervals corresponding to the index set and not with other feedback intervals.

Through the above procedure, the first UE may determine L sets (each set is identified by an index set of time units), and all the time units corresponding to all the indexes included in the union of the L sets may be regarded as N ₁ A time unit. Wherein during the calculation, the first UE may process in the form of index set, or there may be no concept of set, for example, the first UE determines one or more time units according to each of the feedback intervals, and the total time units determined by the first UE according to the feedback intervals may be N ₁ A time unit. Wherein the first UE determines N ₁ The process of the individual time units can be initiatedBefore S406, or may also be considered to include determining N in S406 ₁ A process of time units.

Although the process of determining the feedback resource unit is described by taking the first UE and the second UE as examples in the embodiment of the present application, there are other UEs on the first resource pool for communication, and when these UEs transmit data and corresponding feedback information, feedback may be performed using a feedback interval different from the target feedback interval determined by the first UE and the second UE, for example, using one feedback interval other than the target feedback interval among the multiple feedback intervals associated with the first resource pool. In the mode a, the feedback resource unit on the second time unit may be used by the UE with any feedback interval, so when determining the time unit associated with the second time unit, not only the target feedback interval between the first UE and the second UE, but also other feedback intervals associated with the first resource pool need to be considered. Thus, in mode a, the first UE may determine the time unit associated with the second time unit from the plurality of feedback intervals associated with the first resource pool.

Optionally, the second time unit and N ₁ The association of time units is understood to mean that the second time unit is associated with N ₁ The time units are associated according to a first relationship. Further, in the above N ₁ Part of the time units can be excluded from the time units to determine the remaining N ₃ Time units, N ₃ Is less than or equal to N ₁ Positive integer of N ₃ The time units are associated with the second time unit according to a second relationship. For example, if N ₁ The time units include a fourth time unit, and the second time unit is the first time unit of the at least one time unit (including the time units of the PSFCH) located after the fourth time unit and spaced from the fourth time unit by a distance greater than or equal to the fourth feedback interval, then N ₃ The time units include a fourth time unit. Wherein the fourth feedback interval is any one feedback interval of the plurality of feedback intervals. That is, in some cases, it may occur that the number of time units actually associated with the second time unit is less than N due to limited time unit numbers, etc ₁ Is the condition of (1)The condition is as follows.

For example, the slot numbers (e.g. the numbers of logical slots) in the first resource pool are recorded as 0-T _max –1，T _max May be determined according to configuration information of the first resource pool. Due to T _max Is a positive integer of finite size, so that in time, the number of each time slot is 0 to T _max –1，0～T _max The sequence-1, … … is repeated periodically. When T is _max If the feedback period P is not an integer multiple, it may occur that the number of time units actually associated with the second time unit is less than N ₁ Is the case in (a). The following is T _max For 99, the feedback period p=4 is exemplified. According to this configuration, a slot containing the PSFCH will typically occur every 4 slots, e.g., slots 0,4,8, … …, including the PSFCH. But due to T _max Since =99 is not an integer multiple of the feedback period p=4, as shown in fig. 5B, at the boundary between two adjacent cycles, there may be a case where the interval between two adjacent slots (for example, slot 96 and slot 0 in fig. 5B) containing PSFCH is smaller than p=4. When the time slot 0 in fig. 5B is the second time unit, it is assumed that the first resource pool supports two feedback intervals k1=2 and k2=1, and N associated with the time slot 0 is determined according to the above method ₁ The time units are time slots 94-98 in FIG. 5B (the determination may be made with reference to the description of FIG. 6A), i.e., N ₁ =5. However, for time slot 94 in fig. 5B, whether the feedback interval is k2=1 or k1=2, the nearest feedback resource (i.e., the time unit for transmitting the feedback information corresponding to the SL data of time slot 94, or the time unit including the PSFCH) is time slot 96, so that in practice the time unit associated with time slot 0 is only time slot 95 to N in time slot 98 in fig. 5B ₃ =4 slots, the number is less than N ₁ A kind of electronic device.

The embodiment of the present application only enumerates one kind of time units containing PSFCH that actually correlate with a number of time units less than N ₁ Other situations may be possible in addition to this, e.g. where a certain time slot is not available for SL data transmission etc. or from the N in a similar way as described above ₁ The exclusion in each time unit is only needed, and the implementation of the embodiment of the application is not affected.

In determining N ₁ After a time unit, the first UE may determine feedback resource units associated with one time unit and one frequency domain unit from among feedback resource units on the second time unit. In S401, the configuration information may further configure a feedback resource unit available for transmitting the PSFCH on a sub-time unit for transmitting the PFSCH within the time unit including the PSFCH. For example, the configuration information configures M on sub-time units available for transmission of PSFCH in the second time unit ₁ Feedback resource units, M ₁ The first UE may determine M if the number of feedback resource units can be used to transmit PSFCH ₁ And the feedback resource units are associated with one time unit and one frequency domain unit in the feedback resource units. Wherein M is ₁ For example greater than or equal to N ₁ Is a positive integer of (a). For example, the M ₁ The indexes of the feedback resource units are respectively 0-M ₁ -1. An alternative way for the first UE to determine the feedback resource units associated with one time unit and one frequency domain unit in the second time unit is that, in N ₁ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein [ (i+j.N) ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Representing the index set of the feedback resource units.D represents the number of frequency domain units contained in the first resource pool, and D is a positive integer. It can be understood that M on the second time unit ₁ The feedback resource units are divided into N ₁ D.N composed of time units and D frequency domain units ₁ A plurality of resource units (which may be different from the resource resolution of the feedback resource units) for data transmission, i.e. a time unit and a frequency domain unit over the time unit may form a data transmission resource unit, each of which data transmission resource unitsCan bisect M ₁ The +.>The order of bisection of the feedback resource units may be a time-domain-first-frequency-domain-second order. Alternatively, the bisection order may be a frequency domain first and then a frequency domain order, which will not be described herein. In general, the configuration information of the resource pool may be such that M ₁ Is D.N ₁ Is satisfied such that C ₁ Is a positive integer. If M occurs ₁ Not D.N ₁ Special cases of integer multiples of C ₁ Corresponding rounding may also be performed, either upper or lower.

In an alternative embodiment, the first UE determines that the feedback resource unit associated with one time unit and one frequency domain unit in the second time unit is, in an alternative manner, that N associated with the second time unit ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,in this way, when the number of time units actually associated with the second time unit is less than N ₁ In this case, the feedback resource units associated with one time unit and the frequency domain unit may also be determined by referring to the corresponding methods.

In an alternative embodiment, the first UE determines that the feedback resource unit associated with one time unit and one frequency domain unit in the second time unit is, in an alternative manner, that N associated with the second time unit ₃ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₃ )·C ₃ ，(i+j·N ₃ +1)·C ₃ -1]Wherein, the method comprises the steps of, wherein,in general, the configuration information of the resource pool may be such that M ₁ Is D.N ₃ Is satisfied such that C ₃ Is a positive integer. If M occurs ₁ Not D.N ₃ Special cases of integer multiples of C ₃ Corresponding rounding may also be performed, either upper or lower. In this way, when the number of time units actually associated with the second time unit is less than N ₁ In this case, M can be considered as ₁ The feedback resource units are divided into N ₃ Time units among the time units and frequency domain units.

The first UE may determine the associated one or more feedback resource units according to a time unit and a frequency domain unit included in the first resource occupied by the first SL data. If the first SL data occupies one time unit and one frequency domain unit, e.g., the first SL data is transmitted in time unit i and frequency domain unit j (i.e., the first resource includes time unit i in the time domain and frequency domain unit j in the frequency domain), the first UE may determine that time unit i and frequency domain unit j are in M ₁ The associated feedback resource unit of the feedback resource units (e.g., feedback resource unit [ (i+j.N) ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]) And (3) a feedback resource unit associated with the first SL data.

Alternatively, if the first SL data occupies one time unit and/or multiple frequency domain units, the feedback resource unit associated with the time unit in which the first SL data is located and each frequency domain unit therein may be considered as a feedback resource unit associated with the first time unit; alternatively, the feedback resource unit associated with the time unit in which the first SL is located and the starting frequency domain unit may be considered as the feedback resource unit associated with the first SL data. The first UE and the second UE may default to one of the two methods, or may be configured through higher layer information, for example, configured through configuration information, and the first UE and the second UE determine to use one of the two methods according to the configuration information.

Or if the first SL data occupies a plurality of time units and/or a plurality of frequency domain units, optionally, feedback resource units associated with the time unit in which the first SL data is located and each frequency domain unit therein may be considered feedback resource units associated with the first time unit, that is, for each time unit in which the first SL data is located and each frequency domain unit therein, a corresponding feedback resource unit may be determined as described above, and the union of the finally determined feedback resource units is the feedback resource unit associated with the first SL data; alternatively, the feedback resource units associated with the start time unit and the start frequency domain unit where the first SL data is located may be considered as feedback resource units associated with the first SL data. The first UE and the second UE may default to one of the two methods, or may be configured through higher layer information, for example, configured through configuration information, and the first UE and the second UE determine to use one of the two methods according to the configuration information.

Through the above procedure, the number of feedback resource units associated with the first SL data within the second time unit determined by the first UE may be one or more, and the first UE may determine the first feedback resource unit from the at least one feedback resource unit, and the number of the first feedback resource units may be at least one. The manner in which the first UE determines the first feedback resource unit from the at least one feedback resource unit may be referred to in the related description above.

For example, referring to fig. 6A, a time unit is taken as a slot, and a feedback resource unit is taken as a PRB as an example. For example, the feedback period configured by the configuration information is p=4 slots, and in the first resource pool, slot 0, slot 4, and slot 8 … … are slots including feedback resource units, which may be referred to as PSFCH slots. Wherein time slot 0 is not shown in fig. 6A. In addition, the configuration information configures two feedback intervals for the first resource pool, where k1=2 and k2=1, respectively. For example, for the second PSFCH slot (slot 8) in fig. 6A, the first UE may determine that slot 8 is associated with 4 slots, slot 3 to slot 6, respectively, according to k1=2; according to k2=1, the first UE may determine that slot 8 is associated with 4 slots, slot 4 to slot 7 respectively. The first UE sums the determined 2 sets of slots and may determine that the slot associated with slot 8 includes slots 3-7, so that these five slots (and corresponding sub-channels) may be associated with one or more PRBs on slot 8 for transmitting the PSFCH. For example, the first UE determines that slot 8 is a second time unit, and the time units associated with the second time unit may include slots 3 through 7. In this way, in each PSFCH slot, the mapping of PRBs and slots and subchannels comprehensively considers various feedback intervals associated with the first resource pool, and a certain PRB can be allocated to all slots associated with the PSFCH slot, so as to solve the problem of resource collision.

The feedback interval adopted by the first UE and the second UE may be determined by the foregoing manner, which is not repeated. For example, the second UE sends SL data to the first UE in slot 3, and the first UE and the second UE determine that the target feedback interval is k1=2, then the first UE needs to send feedback information to the second UE in the second PSFCH slot (slot 8). For another example, the second UE sends SL data to the first UE in slot 3, and the first UE and the second UE determine that the target feedback interval is k2=1, then the first UE needs to send feedback information to the second UE in the first PSFCH slot (slot 4). It can be seen that if the first UE transmits feedback information to the second UE in slot 8, slot 3 is the first slot among the five slots associated with slot 8; if the second UE transmits feedback information to the second UE in slot 4, slot 3 is the last slot among the five slots associated with slot 4 (the remaining 2 slots associated with slot 4 are not shown in fig. 6A). It can thus be seen that although the resource position of the first SL data does not change, the time slots used to transmit the feedback information may differ due to the difference in the feedback interval, with the first SL data being associated with N in the feedback time slots ₁ Or N ₃ The positions in the slots are also different, so that the PRBs used for transmitting the feedback information map determined by the above-described mapping relationship may also be different.

When the configuration information is implemented in the manner B described in S401, the first UE may determine a time unit associated with the second time unit according to the target feedback interval, and further determine the first feedback resource unit.

As can be seen from the above description, if the target feedbackThe interval is one of a plurality of feedback intervals, the first UE determines the first feedback resource unit in the feedback resource unit set corresponding to the target feedback interval, the feedback resource unit sets corresponding to different feedback intervals are different, and the UE adopting different feedback intervals does not conflict when determining the feedback resource unit, so in the mode B, the first UE only needs to consider the target feedback interval when determining the time unit related to the second time unit, and the execution process of the first UE can be simplified without considering other feedback intervals except the target feedback interval in the plurality of feedback intervals. For example, the first UE may determine a time unit associated with the second time unit based on the second time unit and the target feedback interval, e.g., the first UE determines the number of time units associated with the second time unit to be N ₂ N, N ₂ May be a positive integer equal to the feedback period. For example, if one time unit (referred to as a third time unit) is located before the second time unit, the interval between the third time unit and the second time unit is greater than or equal to the target feedback interval, and the interval between the third time unit and the second time unit is less than the target feedback interval plus the feedback period, then N ₂ The time units may include a third time unit, N if the third time unit does not satisfy the above condition ₂ The time units do not include a third time unit.

For example, the target feedback interval is denoted as K _D The index of the second time unit is for example n and the feedback period is for example P. The first UE may determine a portion of the time units associated with the second time unit, e.g., the index set of the time units associated with the second time unit is [ n-K ] _D –P+1，n–K _D ]It can be found that the second time unit is associated with P time units, and thus N ₂ The index set of the time units associated with the second time unit can also be denoted as [ n-K ] _D –N ₂ +1，n–K _D ]。

Through the above procedure, the first UE can determine N ₂ A time unit. Wherein during the calculation, the first UE may process in the form of an index set, e.g. the first UE determines An index set of time units associated with the second time unit, the index set comprising N ₂ A time cell; or there may be no notion of aggregation, e.g. the first UE determines N from the target feedback interval ₂ Time units of N ₂ The time units do not belong to a certain set. Wherein the first UE determines N ₂ The process of the time units may occur prior to S406, or may be considered to include determining N in S406 ₂ A process of time units.

Optionally, the second time unit and N ₂ The association of time units is understood to mean that the second time unit is associated with N ₂ The time units are associated according to a third relationship. Further, in the above N ₂ Part of the time units can be excluded from the time units to determine the remaining N ₄ Time units, N ₄ Is less than or equal to N ₂ Positive integer of N ₄ The time units are associated with the second time unit according to a fourth relationship. For example, if N ₂ The time units include a fourth time unit, and the second time unit is the first time unit of the at least one time unit (time units including PSFCH) located after the fourth time unit and spaced from the fourth time unit by greater than or equal to the target feedback interval, then N ₄ The time units include a fourth time unit. That is, in some cases, it may occur that the number of time units actually associated with the second time unit is less than N due to limited time unit numbers, etc ₂ Is the case in (a). For specific details, reference may be made to the foregoing for N ₁ And N ₃ The description of the relationship is not repeated here.

In determining N ₂ And/or N ₄ After a time unit, the first UE may determine feedback resource units associated with one time unit and one frequency domain unit from among feedback resource units on the second time unit. The configuration information, e.g., in S401, configures a plurality of sets of feedback resource elements over sub-time units available for transmission of the PSFCH within a second time unit, the plurality of sets of feedback resource elements corresponding one-to-one to a plurality of feedback intervals, wherein the first set of feedback resource elements corresponds to a target feedback interval, a first inverseThe set of feed resource units comprises, for example, M ₂ Feedback resource units, M ₂ The first UE may determine M if the number of feedback resource units can be used to transmit PSFCH ₂ And the feedback resource units are associated with one time unit and one frequency domain unit in the feedback resource units. Wherein M is ₂ For example greater than or equal to N ₂ Is a positive integer of (a). For example, the M ₂ The indexes of the feedback resource units are respectively 0-M ₂ -1. An alternative way for the first UE to determine the feedback resource units associated with one time unit and one frequency domain unit in the second time unit is that, in N ₂ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein [ (i+j.N) ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Representing the index set of the feedback resource units.D represents the number of frequency domain units contained in the first resource pool, and D is a positive integer. It can be understood that M on the second time unit ₂ The feedback resource units are divided into N ₂ (or P) time units and D.N composed of D frequency domain units ₂ Each resource unit (which may be different from the resource resolution of the feedback resource unit), i.e., a time unit and a frequency domain unit over the time unit may form a resource unit, each of which may bisect M ₂ The +.>The order of bisection of the feedback resource units may be a time-domain-first-frequency-domain-second order. Alternatively, the bisection order may be a frequency domain first and then a frequency domain order, which will not be described herein. In general, the configuration information of the resource pool may be such that M ₂ Is D.N ₂ Is satisfied such that C ₂ Is a positive integer. If M occurs ₂ Not D.N ₂ Integer of (2)Special case of times C ₂ Corresponding rounding may also be performed, either upper or lower.

In an alternative embodiment, the first UE determines the feedback resource units associated with one time unit and one frequency domain unit in the second time unit in such a way that, in N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,in this way, when the number of time units actually associated with the second time unit is less than N ₂ In this case, the feedback resource units associated with one time unit and the frequency domain unit may also be determined by referring to the corresponding methods.

In another alternative embodiment, the first UE determines the feedback resource units associated with one time unit and one frequency domain unit in the second time unit in such a way that, in N ₄ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₄ )·C ₄ ，(i+j·N ₄ +1)·C ₄ -1]Wherein, the method comprises the steps of, wherein,in general, the configuration information of the resource pool may be such that M ₂ Is D.N ₄ Is satisfied such that C ₄ Is a positive integer. If M occurs ₂ Not D.N ₄ Special cases of integer multiples of C ₄ Corresponding rounding may also be performed, either upper or lower. In this way, when the number of time units actually associated with the second time unit is less than N ₂ In this case, the M can be considered as ₂ The feedback resource units are divided into N ₄ Time units among the time units and frequency domain units.

The first UE can occupy the first SL data according to the first SL dataA resource includes time units and frequency domain units, and an associated one or more feedback resource units are determined. If the first SL data occupies one time unit and one frequency domain unit, e.g., the first SL data is transmitted in time unit i and frequency domain unit j (i.e., the first resource includes time unit i and frequency domain unit j), the first UE may determine that time unit i and frequency domain unit j are in M ₂ The associated feedback resource unit of the feedback resource units (e.g., feedback resource unit [ (i+j.N) ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]) And (3) a feedback resource unit associated with the first SL data.

Alternatively, if the first SL data occupies one time unit and/or multiple frequency domain units, the feedback resource unit associated with the time unit in which the first SL data is located and each of the frequency domain units may be considered as the feedback resource unit associated with the first time unit. Alternatively, the feedback resource unit associated with the time unit in which the first SL data is located and the starting frequency domain unit may be considered as the feedback resource unit associated with the first SL data.

Or if the first SL data occupies a plurality of time units and a plurality of frequency domain units, optionally, feedback resource units associated with the time unit in which the first SL data is located and each frequency domain unit therein may be considered feedback resource units associated with the first time unit, that is, for each time unit in which the first SL data is located and each frequency domain unit therein, a corresponding feedback resource unit may be determined as described above, and the union of the finally determined feedback resource units is the feedback resource unit associated with the first time unit; alternatively, the feedback resource units associated with the start time unit and the start frequency domain unit where the first SL data is located may be considered as feedback resource units associated with the first SL data. The first UE and the second UE may default to one of the methods described above, or may be configured through higher layer information, for example, configuration information, according to which the first UE and the second UE determine to use one of the methods described above.

Through the above procedure, the number of feedback resource units associated with the first SL data within the second time unit determined by the first UE may be one or more, and the first UE may determine the first feedback resource unit from the at least one feedback resource unit, and the number of the first feedback resource units may be at least one. Regarding the manner in which the first UE determines the first feedback resource unit from the at least one feedback resource unit, reference may be made to the foregoing related description.

For example, referring to fig. 6B, a time unit is taken as a slot, and a feedback resource unit is taken as a PRB as an example. For example, the feedback period configured by the configuration information is p=4 slots, and in the first resource pool, slot 0, slot 4, and slot 8 … … are slots including feedback resource units, which may be referred to as PSFCH slots. Wherein time slot 0 is not shown in fig. 6B. In addition, the configuration information configures two feedback intervals for the first resource pool, where k1=2 and k2=1, respectively. For example, for the second PSFCH slot (slot 8) in fig. 6B, the first UE may determine that slot 8 is associated with 4 slots, slot 3 to slot 6, respectively, according to k1=2; according to k2=1, the first UE may determine that slot 8 is associated with 4 slots, slot 4 to slot 7 respectively. For example, the first UE determines that the time slot 8 is a second time unit, and if the target feedback interval is k1=2, the time unit associated with the second time unit may include time slots 3 to 6; alternatively, if the target feedback interval is k2=1, the time unit associated with the second time unit may include time slots 4-7. In the PSFCH slot, PRBs on the PSFCH symbol used for transmitting feedback information may be divided into two PRB sets, where each PRB set corresponds to one feedback interval, for example, the PRB set represented by a horizontal line in the PSFCH slot corresponds to a feedback interval of k1=2, and the PRB set represented by a vertical line corresponds to a feedback interval of k2=1. Thus, in each PSFCH slot, different feedback intervals correspond to different PRBs, and there is no resource collision between them.

The feedback interval adopted by the first UE and the second UE may be determined by the foregoing manner, which is not repeated. For example, the second UE sends SL data to the first UE in time slot 3, and the first UE and the second UE determine that the target feedback interval is k1=2, then the first UE needs to send feedback information to the second UE in time slot 8. Wherein the first UE may select PRBs from a set of PRBs represented by a horizontal line portion on the slot 8 to transmit feedback information. For another example, the second UE transmits SL data to the first UE in time slot 3, and the first UE and the second UE determine that the target feedback interval is k2=1, the first UE needs to transmit feedback information to the second UE in time slot 4. Wherein the first UE may select PRBs from a set of PRBs represented by a vertical line portion on slot 4 to transmit feedback information. It can be seen that although the resource location of the first SL data is not changed, the slots for transmitting the feedback information may be different due to the difference in the feedback interval, and PRBs to which the feedback information is mapped may be different.

S407, the second UE determines a first feedback resource unit according to the position of the first resource and the target feedback interval.

The second UE is to receive feedback information of the first SL data, and thus may also determine the first feedback resource unit. The manner in which the second UE determines the first feedback resource unit may be similar or identical to the manner in which the first UE determines the first feedback resource unit, and thus reference may be made to the description of S406.

Wherein S407 may occur before S406, or after S406, or simultaneously with S406.

S408, the first UE sends feedback information of the first SL data to the second UE in the first feedback resource unit. Accordingly, the second UE receives the feedback information from the first UE in the first feedback resource unit. The time unit occupied by the feedback information is a second time unit. The feedback information is SL HARQ ACK or SL HARQ NACK, for example.

The embodiment of the application can associate a plurality of feedback intervals for the first resource pool, and two UEs can select one proper feedback interval (the selected feedback interval is called a target feedback interval) from the feedback intervals when communicating, and the target feedback interval can meet the capability and time delay requirements of the two UEs. By associating a plurality of feedback intervals for a resource pool, different devices using the resource pool are enabled to select respective suitable feedback intervals. For example, if the service executed by the UE has a higher requirement on the delay, the UE may select a feedback interval with a smaller value as the target feedback interval to meet the delay requirement of the service; if the service executed by the UE has low requirement on time delay, the UE can select a feedback interval with a larger value as a target feedback interval, so that the time delay requirement of the service can be met, the capability of the UE cannot be excessively high, and the cost of the UE can be reduced. Therefore, by adopting the scheme of the embodiment of the application, the time delay requirements of different services can be met. Meanwhile, in the embodiment of the application, the mapping relation between the data transmission resources and the feedback resources is designed by comprehensively considering a plurality of feedback intervals associated with the resource pool, so that after a plurality of associated feedback intervals are introduced into one resource pool, the feedback resources corresponding to different data transmission resources are also ensured to be different, and the conflict of the feedback resources is avoided.

Fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device 700 may be the first UE or the circuitry of the first UE according to the embodiment shown in fig. 4, for implementing the method corresponding to the first UE in the above method embodiment. Alternatively, the communication apparatus 700 may be the second UE in the embodiment shown in fig. 4 or the circuitry of the second UE, for implementing the method corresponding to the second UE in the above method embodiment. Specific functions can be seen from the description of the method embodiments described above. One type of circuitry is, for example, a chip system.

The communication device 700 includes at least one processor 701. The processor 701 may be used for internal processing of the device, implementing certain control processing functions. Optionally, the processor 701 includes instructions. Alternatively, the processor 701 may store data. Alternatively, the different processors may be separate devices, may be located in different physical locations, and may be located on different integrated circuits. Alternatively, the different processors may be integrated in one or more processors, e.g., integrated on one or more integrated circuits.

Optionally, the communication device 700 includes one or more memories 703 to store instructions. Optionally, the memory 703 may also store data. The processor and the memory may be provided separately or may be integrated.

Optionally, the communication device 700 includes a communication line 702, and at least one communication interface 704. In fig. 7, the memory 703, the communication line 702, and the communication interface 704 are all optional, and are indicated by dashed lines.

Optionally, the communication device 700 may also include a transceiver and/or an antenna. Wherein the transceiver may be used to transmit information to or receive information from other devices. The transceiver may be referred to as a transceiver, a transceiver circuit, an input-output interface, etc. for implementing the transceiver function of the communication device 700 via an antenna. Optionally, the transceiver comprises a transmitter (transmitter) and a receiver (receiver). Illustratively, a transmitter may be used to generate a radio frequency (radio frequency) signal from the baseband signal, and a receiver may be used to convert the radio frequency signal to the baseband signal.

The processor 701 may include a general purpose central processing unit (central processing unit, CPU), microprocessor, application specific integrated circuit (application specific integrated circuit, ASIC), or one or more integrated circuits for controlling the execution of programs in accordance with aspects of the present application.

Communication line 702 may include a pathway to transfer information between the aforementioned components.

Communication interface 704, using any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), wired access network, etc.

The memory 703 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc-only memory (compact disc read-only memory) or other optical disk storage, a compact disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, 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. The memory 703 may be present independently and is coupled to the processor 701 via a communication line 702. Alternatively, the memory 703 may be integrated with the processor 701.

The memory 703 is used for storing computer-executable instructions for executing the embodiments of the present application, and is controlled by the processor 701. The processor 701 is configured to execute computer-executable instructions stored in the memory 703 to implement steps performed by a first UE as described in the embodiment shown in fig. 4 or to implement steps performed by a second UE as described in the embodiment shown in fig. 4.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In a particular implementation, as one embodiment, the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7.

In a particular implementation, as one embodiment, the communications apparatus 700 can include a plurality of processors, such as the processor 701 and the processor 705 in FIG. 7. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

When the apparatus shown in fig. 7 is a chip, for example a chip of a first UE, or a chip of a second UE, the chip comprises a processor 701 (which may also comprise a processor 705), a communication line 702 and a communication interface 704, which may optionally comprise a memory 703. In particular, communication interface 704 may be an input interface, a pin, or a circuit, among others. The memory 703 may be a register, a cache, or the like. The processor 701 and the processor 705 may be a general purpose CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of programs in the communication method of any of the embodiments described above.

The embodiment of the application may divide the functional modules of the apparatus according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. For example, in the case of dividing the respective functional modules by the respective functions, fig. 8 shows a schematic diagram of an apparatus, and the apparatus 800 may be the first UE or the second UE, or a chip in the first UE or a chip in the second UE, which are involved in the respective method embodiments described above. The apparatus 800 comprises a transmitting unit 801, a processing unit 802 and a receiving unit 803.

It should be understood that the apparatus 800 may be used to implement the steps performed by the first UE or the second UE in the communication method according to the embodiments of the present application, and the relevant features may refer to the embodiment shown in fig. 4 and will not be described herein.

Alternatively, the functions/implementation procedures of the transmitting unit 801, the receiving unit 803, and the processing unit 802 in fig. 8 may be implemented by the processor 701 in fig. 7 calling computer-executable instructions stored in the memory 703. Alternatively, the functions/implementation procedure of the processing unit 802 in fig. 8 may be implemented by the processor 701 in fig. 7 calling computer-executable instructions stored in the memory 703, and the functions/implementation procedure of the transmitting unit 801 and the receiving unit 803 in fig. 8 may be implemented by the communication interface 704 in fig. 7.

Alternatively, when the apparatus 800 is a chip or a circuit, the functions/implementation procedures of the transmitting unit 801 and the receiving unit 803 may also be implemented by pins or circuits, or the like.

The present application also provides a computer readable storage medium storing a computer program or instructions that, when executed, implement a method performed by a first UE or a second UE in the foregoing method embodiments. Thus, the functions described in the above embodiments may be implemented in the form of software functional units and sold or used as independent products. Based on such understanding, the technical solution of the present application may be embodied in essence or contributing part or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The present application also provides a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by the first UE or the second UE in any of the method embodiments described above.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform a method performed by the first UE or the second UE according to any of the method embodiments described above.

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

The various illustrative logical blocks and circuits described in the embodiments of the present application may be implemented or performed with a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field-programmable gate array (field-programmable gate array, FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the general purpose processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments of the present application may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software elements may be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), EEPROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In an example, a storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may reside in a terminal device. In the alternative, the processor and the storage medium may reside in different components in a terminal device.

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.

The matters in the various embodiments of the present application may be referenced to each other in terms and/or descriptions consistent with each other and to each other in the absence of specific illustrations and logic conflicts between, the technical features of the different embodiments may be combined to form new embodiments based on the inherent logic relationships.

It is understood that in the embodiment of the present application, the first UE or the second UE may perform some or all of the steps in the embodiment of the present application, these steps or operations are merely examples, and in the embodiment of the present application, other operations or variations of various operations may also be performed. Furthermore, the various steps may be performed in a different order presented in accordance with embodiments of the present application, and it is possible that not all of the operations in the embodiments of the present application may be performed.

Claims

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

determining configuration information, wherein the configuration information is used for configuring a first resource pool and a plurality of feedback intervals associated with the first resource pool, and the first resource pool is used for sending and/or receiving signals by the first terminal equipment;

receiving first side line data at a first resource, wherein a time domain resource of the first resource comprises a first time unit in the first resource pool;

determining a target feedback interval, the target feedback interval being one of the plurality of feedback intervals;

and determining a first feedback resource unit according to the position of the first resource and the target feedback interval, wherein the first feedback resource unit is positioned on a second time unit, and the interval between the second time unit and the first time unit is larger than or equal to the target feedback interval.

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

and sending feedback information of the first sidestream data in the first feedback resource unit.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

Determining a larger value of a first feedback interval and a second feedback interval as the target feedback interval, or determining the first feedback interval as the target feedback interval, wherein the first feedback interval is a feedback interval supported by the first terminal equipment, the first feedback interval belongs to the plurality of feedback intervals, the second feedback interval is a feedback interval supported by the second terminal equipment, and the second feedback interval belongs to the plurality of feedback intervals.

4. The method of claim 3, wherein the first feedback interval is a feedback interval with a smallest value among a feedback intervals supported by the first terminal device, the second feedback interval is a feedback interval with a smallest value among B feedback intervals supported by the second terminal device, the a feedback intervals belong to the plurality of feedback intervals, the B feedback intervals belong to the plurality of feedback intervals, and a and B are both positive integers.

5. The method according to any one of claims 1 to 4, further comprising:

and sending first information to second terminal equipment, wherein the first information is used for indicating the target feedback interval.

6. A method according to claim 1 or 2, characterized in that,

The method further comprises the steps of: receiving first information from a second terminal device, wherein the first information is used for indicating the target feedback interval;

determining a target feedback interval includes: and determining the target feedback interval according to the first information.

7. The method according to claim 1 or 2, characterized in that the method further comprises:

before receiving the first side data, receiving second information from a second terminal device or transmitting the second information to the second terminal device, wherein,

the second information comprises an incidence relation between X feedback intervals and X side-row HARQ process identifications, or an incidence relation between X feedback intervals and X priorities, or an incidence relation between X feedback intervals and X transmission resources, wherein the X feedback intervals included in the second information belong to the feedback intervals, and X is a positive integer.

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

receiving sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data;

determining a target feedback interval includes:

the lateral control information comprises information of a first lateral HARQ process identifier, the association of the first lateral HARQ process identifier and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval; or alternatively, the first and second heat exchangers may be,

The sidestream control information comprises information of a first priority, the association of the first priority and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval; or alternatively, the first and second heat exchangers may be,

and the sidestream control information comprises information of the first resource, the association between the first resource and a third feedback interval is determined according to the second information, and the third feedback interval is determined to be the target feedback interval.

9. A method according to claim 1 or 2, characterized in that,

the method further comprises the steps of: receiving sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data, and the sidestream control information is also used for indicating the target feedback interval;

determining a target feedback interval includes: and determining the target feedback interval according to the sidestream control information.

10. The method according to any one of claims 3 to 9, further comprising:

and transmitting first capability information to a second terminal device and/or receiving second capability information from the second terminal device, wherein the first capability information indicates at least one feedback interval of the plurality of feedback intervals, and the second capability information indicates at least one feedback interval of the plurality of feedback intervals.

11. The method according to any one of claims 1-10, wherein the configuration information comprises information of a feedback period, the method further comprising:

determining at least one time unit in the first resource pool according to the feedback period, wherein the at least one time unit comprises a feedback resource unit for transmitting feedback information;

and determining the second time unit from the at least one time unit according to the first time unit and the target feedback interval, wherein the second time unit is the first time unit which is positioned behind the first time unit in the at least one time unit and has an interval with the first time unit greater than or equal to the target feedback interval.

12. The method of claim 11, wherein the method further comprises:

according to the instituteThe second time unit and the plurality of feedback intervals determine N associated with the second time unit ₁ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to a fourth feedback interval, and an interval between the third time unit and the second time unit is less than the fourth feedback interval plus the feedback period, the N ₁ The time units include the third time unit, wherein the fourth feedback interval is any one feedback interval of the feedback intervals, N ₁ Is a positive integer.

13. The method of claim 12, wherein the step of determining the position of the probe is performed,

the N is ₁ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the first resource pool, M ₁ Representing the number of feedback resource units, M, over the second time unit ₁ Is greater than or equal to N ₁ D is a positive integer.

14. The method of claim 11, wherein the method further comprises:

determining N associated with the second time unit according to the second time unit and the target feedback interval ₂ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to the target feedback interval, and an interval between the third time unit and the second time unit is less than the target feedback interval plus the feedback period, the N ₂ Time of eachThe unit includes the third time unit, N ₂ Is a positive integer.

15. The method of claim 14, wherein the step of providing the first information comprises,

the N is ₂ Of the time units, time unit i and frequency domain unit j are associated with M ₂ Feedback resource units [ (i+j.N) among the feedback resource units ₂ )·C ₂ ，(i+j·N ₂ +1)·C ₂ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the first resource pool, M ₂ Representing the number of feedback resource units associated with the target feedback interval, M, over the second time unit ₂ Is greater than or equal to N ₂ D is a positive integer.

16. The method of claim 15, wherein the second time unit comprises a plurality of sets of feedback resource units, the plurality of sets of feedback resource units having a one-to-one correspondence with the plurality of feedback intervals, each set of feedback resource units comprising one or more feedback resource units, the M ₂ And the configuration information comprises the corresponding relation between the feedback resource unit sets and the feedback intervals.

17. The method according to claim 13, 15 or 16, wherein the method further comprises:

Determining one or more feedback resource units on the second time unit associated with time units and frequency domain units comprised by the first resource;

the first feedback resource unit is determined from the one or more feedback resource units.

18. The method according to any of claims 1-17, wherein the time unit comprises a time slot, the frequency domain unit comprises a subchannel, the feedback resource unit comprises a physical resource block, PRB, the first resource comprises one time slot or a plurality of time slots in the time domain and one or a plurality of subchannels in the frequency domain.

19. A communication method, applied to a second terminal device, the method comprising:

determining configuration information, wherein the configuration information is used for configuring a first resource pool and a plurality of feedback intervals associated with the first resource pool, and the first resource pool is used for sending and/or receiving signals by the second terminal equipment;

transmitting first sidestream data on a first resource, wherein a first time unit in the first resource pool comprises time domain resources of the first resource;

20. The method of claim 19, wherein the method further comprises:

and receiving feedback information of the first sidestream data in the first feedback resource unit.

21. The method according to claim 19 or 20, characterized in that the method further comprises:

22. The method of claim 21, wherein the first feedback interval is a feedback interval with a smallest value of a feedback intervals supported by the first terminal device, wherein the second feedback interval is a feedback interval with a smallest value of B feedback intervals supported by the second terminal device, wherein the a feedback intervals belong to the plurality of feedback intervals, wherein the B feedback intervals belong to the plurality of feedback intervals, and wherein a and B are both positive integers.

23. The method according to any one of claims 19 to 22, further comprising:

and sending first information to the first terminal equipment, wherein the first information is used for indicating the target feedback interval.

24. The method according to claim 19 or 20, wherein,

the method further comprises the steps of: receiving first information from a first terminal device;

25. The method according to claim 19 or 20, characterized in that the method further comprises:

before transmitting the first side data, transmitting second information to the first terminal device or receiving second information from the first terminal device, wherein,

the second information comprises an incidence relation between X feedback intervals and X side-row HARQ processes, or an incidence relation between X feedback intervals and X priorities, or an incidence relation between X feedback intervals and X transmission resources, wherein the X feedback intervals included in the second information belong to the feedback intervals, and X is a positive integer.

26. The method of claim 25, wherein the method further comprises:

The sidestream control information is sent, the sidestream control information is used for scheduling the first sidestream data, wherein,

the sidestream control information includes information of a first sidestream HARQ process identification, where the first sidestream HARQ process identification is used for the first terminal device to determine the target feedback interval according to the second information, or,

the sidestream control information includes information of a first priority, where the information of the first priority is used for the first terminal device to determine the target feedback interval according to the second information, or,

the sidestream control information comprises information of the first resource, and the information of the first resource is used for the first terminal equipment to determine the target feedback interval according to the second information.

27. The method according to claim 19 or 20, characterized in that the method further comprises:

and sending sidestream control information, wherein the sidestream control information is used for scheduling the first sidestream data, and the sidestream control information is also used for indicating the target feedback interval.

28. The method according to any one of claims 21 to 27, further comprising:

and transmitting second capability information to the first terminal equipment and/or receiving first capability information from the first terminal equipment, wherein the first capability information indicates at least one feedback interval, and the second capability information indicates at least one feedback interval.

29. The method of any of claims 19-28, wherein the configuration information includes information of a feedback period, the method further comprising:

30. The method of claim 29, further comprising:

determining N associated with the second time unit based on the second time unit and the plurality of feedback intervals ₁ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to a fourth feedback interval, and an interval between the third time unit and the second time unit is less than the fourth feedback interval plus the feedback period, the N ₁ The time units include the third time unit, wherein the fourth feedback interval is any one feedback interval of the feedback intervals, N ₁ Is a positive integer.

31. The method of claim 30, wherein the step of determining the position of the probe is performed,

the N is ₁ Of the time units, time unit i and frequency domain unit j are associated with M ₁ Feedback resource units [ (i+j.N) among the feedback resource units ₁ )·C ₁ ，(i+j·N ₁ +1)·C ₁ -1]Wherein, the method comprises the steps of, wherein,d represents the number of frequency domain units contained in the second resource pool, M ₁ Representing feedback resources over the second time unitNumber of units, M ₁ Is greater than or equal to N ₁ D is a positive integer.

32. The method of claim 29, further comprising:

determining N associated with the second time unit according to the second time unit and the target feedback interval ₂ Wherein when a third time unit is located before the second time unit, an interval between the third time unit and the second time unit is greater than or equal to the target feedback interval, and an interval between the third time unit and the second time unit is less than the target feedback interval plus the feedback period, the N ₂ The time units comprise the third time unit, N ₂ Is a positive integer.

33. The method of claim 32, wherein the step of determining the position of the probe is performed,

34. The method of claim 33, wherein the second time unit comprises a plurality of sets of feedback resource units, the plurality of sets of feedback resource units having a one-to-one correspondence with the plurality of feedback intervals, each set of feedback resource units comprising one or more feedback resource units, the M ₂ The feedback resource units belong toAnd the configuration information comprises the corresponding relation between the plurality of feedback resource unit sets and the plurality of feedback intervals.

35. The method of claim 31, 33 or 34, further comprising:

Determining one or more feedback resource units associated with the time units and the frequency domain units included in the first resource on the second time unit according to the time units and the frequency domain units included in the first resource;

36. The method according to any of claims 19-35, wherein the time unit comprises a time slot, the frequency domain unit comprises a subchannel, the feedback resource unit comprises a physical resource block, PRB, the first resource comprises one time slot or more time slots in the time domain and one or more subchannels in the frequency domain.

37. A communication device comprising a processor and a memory, the memory and the processor being coupled, the processor being configured to perform the method of any one of claims 1-18 or to perform the method of any one of claims 19-36.

38. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 18 or causes the computer to perform the method of any one of claims 19 to 36.

39. A chip system, the chip system comprising:

a processor and an interface from which the processor invokes and executes instructions that when executed implement the method of any one of claims 1 to 18 or the method of any one of claims 19 to 36.

40. A computer program product, characterized in that the computer program product comprises a computer program which, when run on a computer, causes the computer to carry out the method according to any one of claims 1 to 18 or causes the computer to carry out the method according to any one of claims 19 to 36.