Methods and apparatus for sidelink communication
Embodiments of the present disclosure relate to methods and apparatus for sidelink communication. According to an embodiment of the present disclosure, a method performed by a first user equipment (UE) for wireless communication may include: receiving a sidelink transmission including a first indication to indicate whether a second UE has an ability of providing assistant information for resource selection; and in response to the first indication indicating that the second UE has the ability of providing the assistant information, transmitting a request for the assistant information on one or more feedback resources associated with the sidelink transmission.
1 . A first user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the first UE to:
receive a sidelink transmission comprising a first indication to indicate whether a second UE has an ability of providing assistant information for resource selection;
in response to the first indication indicating that the second UE has the ability of providing the assistant information, determine one or more resources allocated for transmission of feedback associated with the sidelink transmission; and
transmit a request for the assistant information on the one or more resources.
2 . The first UE of claim 1 , wherein the first indication is one bit in a sidelink control information (SCI) format in the sidelink transmission.
3 . The first UE of claim 1 , wherein the one or more resources have at least one of:
a pre-defined or pre-configured frequency domain offset, or
a pre-defined or pre-configured time domain offset, with respect to a feedback resource for hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) information associated with the sidelink transmission.
4 . The first UE of claim 1 , wherein the one or more resources comprise resources for hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) information associated with the sidelink transmission.
5 . The first UE of claim 1 , wherein the one or more resources correspond to a traffic priority level or a packet size of the first UE.
6 . The first UE of claim 1 , wherein the sidelink transmission further comprises a second indication to indicate one or more reserved resources, and the at least one processor is further configured to cause the first UE to receive, on at least one reserved resource of the one or more reserved resources, the assistant information in response to the request.
7 . The first UE of claim 6 , wherein the at least one processor is further configured to cause the first UE to receive a third indication to indicate that the assistant information is transmitted on the at least one reserved resource.
8 . The first UE of claim 7 , wherein the third indication is one bit in a sidelink control information (SCI) format.
9 . The first UE of claim 6 , wherein the assistant information is received in a pre-defined or pre-configured portion of the at least one reserved resource.
10 . A first user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the first UE to:
in response to a first sidelink transmission comprising a first indication indicating that a second UE has an ability of providing assistant information, determine one or more resources allocated for transmission of feedback associated with the first sidelink transmission;
transmit a request for the assistant information for resource selection on the one or more resources; and
receive a second sidelink transmission comprising the assistant information, wherein the second sidelink transmission further comprises an indication that the assistant information is transmitted in the second sidelink transmission.
11 . The first UE of claim 10 , wherein the indication is one bit in a sidelink control information (SCI) format in the second sidelink transmission.
12 . The first UE of claim 10 , wherein the assistant information is received in a pre-defined or pre-configured portion of the second sidelink transmission.
13 . A first user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the first UE to:
transmit a sidelink transmission comprising a first indication to indicate whether the first UE has an ability of providing assistant information for resource selection;
in response to the first indication indicating that the first UE has the ability of providing the assistant information, determine one or more resources allocated for transmission of feedback associated with the sidelink transmission; and
receive, from a second UE, a request for the assistant information on the one or more resources.
14 . A method performed by a first user equipment (UE), the method comprising:
receiving a sidelink transmission comprising a first indication to indicate whether a second UE has an ability of providing assistant information for resource selection;
in response to the first indication indicating that the second UE has the ability of providing the assistant information, determining one or more resources allocated for transmission of feedback associated with the sidelink transmission; and
transmitting a request for the assistant information on the one or more resources.
15 . The method of claim 14 , wherein the first indication is one bit in a sidelink control information (SCI) format in the sidelink transmission.
16 . The method of claim 14 , wherein the one or more resources have at least one of:
a pre-defined or pre-configured frequency domain offset, or
a pre-defined or pre-configured time domain offset, with respect to a feedback resource for hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) information associated with the sidelink transmission.
17 . The method of claim 14 , wherein the one or more resources comprise resources for hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) information associated with the sidelink transmission.
18 . The method of claim 14 , wherein the one or more resources correspond to a traffic priority level or a packet size of the first UE.
19 . The method of claim 14 , wherein the sidelink transmission further comprises a second indication to indicate one or more reserved resources, the method further comprising:
receiving, on at least one reserved resource of the one or more reserved resources, the assistant information in response to the request.
20 . The method of claim 19 , further comprising:
receiving a third indication to indicate that the assistant information is transmitted on the at least one reserved resource.