Methods for communication, terminal device, and computer readable media
Embodiments of the present disclosure relate to devices, methods, devices and computer readable storage media for resource selection in a Vehicle to Everything (V2X) communication. The method comprises determining, at a terminal device, a resource reservation period for at least one sidelink transmission; and in accordance with a determination, based on the resource reservation period, that a reference resource associated with the at least one sidelink transmission is subsequent to a sensing window, determining, from a resource selection window of the terminal device, at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period. In this way, the conflict of resource selection can be avoided and therefore the performance of the sidelink transmission can be improved.
1. A method for communication comprising:
determining, at a terminal device, a resource reservation period for at least one sidelink transmission;
in accordance with a determination, based on the resource reservation period, that a reference resource associated with the at least one sidelink transmission is subsequent to a sensing window, determining, from a resource selection window of the terminal device, at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period;
determining a location of the reference resource in the time-domain;
determining the number of the at least one further reference resource to be reserved; and
determining a further location of the at least one further reference resource on the time-domain based on the location of the reference resource and the number of the at least one further reference resource.
2. The method of claim 1 , wherein determining the resource reservation period comprises:
receiving sidelink control information at a reference time point within the sensing window; and
determining the resource reservation period based on the sidelink control information.
3. The method of claim 1 , wherein determining the resource reservation period comprises:
obtaining the resource reservation period via a higher layer signaling.
4. The method of claim 1 , wherein determining the location comprises:
determining a reference time point at which the sidelink control information is obtained by the terminal device; and
determining the location of the reference resource based on the reference time point and the resource reservation period.
5. The method of claim 1 , wherein determining the at least one further reference resource comprises:
in accordance with a determination that the reference resource is located in a range from an end of the sensing window to a further reference time point, determining the at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period, the sensing of the sidelink control information is triggered at the further reference time point in the time-domain.
6. The method of claim 5 , further comprising:
determining the further reference time point at which the sensing of the sidelink control information is triggered;
determining an offset associated with a subcarrier spacing configuration of a sidelink bandwidth part of the terminal device; and
determining the end of the sensing window based on the further reference time point and the offset.
7. The method of claim 6 , wherein the end of the sensing window is determined by:
t sensing_end =t n SL −T proc,0 SL
wherein t n SL represents the further reference time point, T proc,0 SL represents the offset, and t sensing_end represents the end of the sensing window.
8. The method of claim 1 , wherein determining the number of the at least one further reference resource comprises: determining a range of candidate resources available for the at least one sidelink transmission based on an offset associated with a subcarrier spacing configuration of a sidelink bandwidth part of the terminal device and the resource selection window; and determining the number of the at least one further reference resource based on the range of candidate resources and the resource reservation period.
9. The method of claim 1 , further comprising:
in accordance with a determination that a receiving power level of the at least one sidelink transmission exceeds a threshold level, excluding resources from the resource selection window which belongs to the at least one further reference resource to be reserved.
10. The method of claim 1 , further comprising:
in accordance with a determination that the resource reservation period is obtained from sidelink control information received at a reference time point within the sensing window, excluding, based on the resource reservation period, the at least one further reference resource to be reserved for the at least one sidelink transmission from a set of available resources for the terminal device within the resource selection window.
11. A terminal device, comprising:
a processor, and
a memory storing instructions,
the memory and the instructions being configured, with the processor, to cause the terminal device to:
determine, at a terminal device, a resource reservation period for at least one sidelink transmission;
in accordance with a determination, based on the resource reservation period, that a reference resource associated with the at least one sidelink transmission is subsequent to a sensing window, determine, from a resource selection window of the terminal device, at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period;
determine a location of the reference resource in the time-domain;
determine the number of the at least one further reference resource to be reserved; and
determine a further location of the at least one further reference resource on the time-domain based on the location of the reference resource and the number of the at least one further reference resource.
12. The terminal device of claim 11 , wherein the terminal device is caused to determine the resource reservation period by:
receiving sidelink control information at a reference time point within the sensing window; and
determining the resource reservation period based on the sidelink control information.
13. The terminal device of claim 11 , wherein the terminal device is caused to determine the resource reservation period by:
obtaining the resource reservation period via a higher layer signaling.
14. The terminal device of claim 11 , wherein the terminal device is caused to determine location by:
determining a reference time point at which the sidelink control information is obtained by the terminal device; and
determining the location of the reference resource based on the reference time point and the resource reservation period.
15. The terminal device of claim 11 , wherein the terminal device is caused to determine the at least one further reference resource by:
in accordance with a determination that the reference resource is located in a range from an end of the sensing window to a further reference time point, determining the at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period, the sensing of the sidelink control information is triggered at the further reference time point in the time-domain.
16. The terminal device of claim 11 , wherein the terminal device is further caused to:
in accordance with a determination that a receiving power level of the at least one sidelink transmission exceeds a threshold level, exclude resources from the resource selection window which belongs to the at least one further reference resource to be reserved.
17. The terminal device of claim 11 , wherein the terminal device is further caused to:
in accordance with a determination that the resource reservation period is obtained from sidelink control information received at a reference time point within the sensing window, exclude, based on the resource reservation period, the at least one further reference resource to be reserved for the at least one sidelink transmission from a set of available resources for the terminal device within the resource selection window.
18. A non-transitory computer readable medium comprising program instructions for causing an apparatus to:
determine, at a terminal device, a resource reservation period for at least one sidelink transmission;
in accordance with a determination, based on the resource reservation period, that a reference resource associated with the at least one sidelink transmission is subsequent to a sensing window, determine, from a resource selection window of the terminal device, at least one further reference resource to be reserved for the at least one sidelink transmission based on the resource reservation period;
determine a location of the reference resource in the time-domain;
determine the number of the at least one further reference resource to be reserved; and
determine a further location of the at least one further reference resource on the time-domain based on the location of the reference resource and the number of the at least one further reference resource.