Methods and apparatus for resource sharing in the sidelink

1 . A method comprising:

sensing, by a first communication device, availability of transmission resources;

determining, by the first communication device, a first candidate sidelink resource set in accordance with the availability of the transmission resources; and

transmitting, by the first communication device, to a second communication device, a sidelink control information (SCI) message comprising a priority indicator indicating a priority associated with the first candidate sidelink resource set and time resource assignments of the first candidate sidelink resource set, the time resource assignments indicating resources reserved by the first communication device for updating a second candidate sidelink resource set of the second communication device, the SCI message further comprising a resource type indicator indicating whether the first candidate sidelink resource set is preferred resources or not.

2 . The method of claim 1 , the priority indicating that the first communication device has a priority level above a predetermined threshold.

3 . The method of claim 1 , the SCI message further comprising a reservation periodicity indicator indicating a reservation periodicity of the first candidate sidelink resource set.

4 . The method of claim 1 , the priority indicator indicating a minimum priority level among candidate priority levels for the first candidate sidelink resource set.

5 . The method of claim 1 , further comprising:

transmitting, by the first communication device, to the second communication device, a capability indicator indicating capabilities of the first communication device.

6 . The method of claim 5 , the capability indicator being transmitted in at least one of a radio resource control (RRC) message, or the SCI message.

7 . The method of claim 5 , the capability indicator further comprising a traffic priority level indicator indicating a traffic priority level to which capabilities of the second communication device apply.

8 . A method comprising:

sensing, by a first communication device, availability of transmission resources;

determining, by the first communication device, a first candidate sidelink resource set in accordance with the availability of the transmission resources;

receiving, by the first communication device, from a second communication device, a sidelink control information (SCI) message comprising a first priority indicator indicating a first priority associated with a second candidate sidelink resource set and time resource assignments of the second candidate sidelink resource set, the SCI message further comprising a resource type indicator indicating whether the second candidate sidelink resource set is preferred resources or not; and

updating, by the first communication device, the first candidate sidelink resource set in accordance with the second candidate sidelink resource set and the resource type indicator.

9 . The method of claim 8 , the SCI message further comprising a reservation periodicity indicator indicating a reservation periodicity of the second candidate sidelink resource set.

10 . The method of claim 8 , the first priority indicator indicating a minimum priority level among candidate priority levels for the second candidate sidelink resource set.

11 . The method of claim 8 , the time resource assignments of the second candidate sidelink resource set comprising resources reserved by the first communication device for coordination.

12 . The method of claim 8 , further comprising:

determining, by the first communication device, a capability indicator indicating capabilities of the second communication device.

13 . The method of claim 12 , the determining the capability indicator comprising at least one of:

receiving the capability indicator from an access node,

receiving the capability indicator in a sidelink radio resource control (RRC) message,

retrieving the capability indicator preconfigured in a memory of the first communication device, or

receiving the capability indicator in the SCI message.

14 . The method of claim 12 , the capability indicator further comprising a traffic priority level indicator indicating a traffic priority level to which the capabilities of the second communication device apply.

15 . The method of claim 12 , the first priority being applied in accordance with at least one of a capability of the first communication device or a feature of the first communication device.

16 . The method of claim 9 , further comprising:

selecting, by the first communication device, resources from the updated first candidate sidelink resource set for sidelink communication.

17 . The method of claim 16 , further comprising:

transmitting, by the first communication device, data on the selected resources to the second communication device.

18 . A first communication device comprising:

one or more processors; and

a non-transitory memory storage storing instructions that, when executed by the one or more processors, cause the first communication device to perform operations including:

sensing availability of transmission resources;

determining a first candidate sidelink resource set in accordance with the availability of the transmission resources; and

transmitting, to a second communication device, a sidelink control information (SCI) message comprising a priority indicator indicating a priority associated with the first candidate sidelink resource set and time resource assignments of the first candidate sidelink resource set, the time resource assignments comprising resources reserved by the first communication device for updating a second candidate sidelink resource set of the second communication device, the SCI message further comprising a resource type indicator indicating whether the first candidate sidelink resource set is preferred resources or not.

19 . The first communication device of claim 18 , the priority indicating that the first communication device has a priority level above a predetermined threshold.

20 . The first communication device of claim 18 , the SCI message further comprising a reservation periodicity indicator indicating a reservation periodicity of the first candidate sidelink resource set.

21 . The first communication device of claim 18 , the priority indicator indicating a minimum priority level among candidate priority levels for the first candidate sidelink resource set.

22 . The first communication device of claim 18 , the operations further comprising:

transmitting, to the second communication device, a capability indicator indicating capabilities of the first communication device.

23 . The first communication device of claim 22 , the capability indicator further comprising a traffic priority level indicator indicating a traffic priority level to which capabilities of the second communication device apply.

24 . A first communication device comprising:

one or more processors; and

a non-transitory memory storage comprising instructions that, when executed by the one or more processors, cause the first communication device to perform operations including:

sensing availability of transmission resources;

determining a first candidate sidelink resource set in accordance with the availability of the transmission resources;

receiving, from a second communication device, a sidelink control information (SCI) message comprising a first priority indicator indicating a first priority associated with a second candidate sidelink resource set and time resource assignments of the second candidate sidelink resource set, the SCI message further comprising a resource type indicator indicating whether the second candidate sidelink resource set is preferred resources or not; and

updating the first candidate sidelink resource set in accordance with the second candidate sidelink resource set and the resource type indicator.

25 . The first communication device of claim 24 , the SCI message further comprising a reservation periodicity indicator indicating a reservation periodicity of the second candidate sidelink resource set.

26 . The first communication device of claim 24 , the first priority indicator indicating a minimum priority level among candidate priority levels for the second candidate sidelink resource set.

27 . The first communication device of claim 24 , the time resource assignments of the second candidate sidelink resource set comprising resources reserved by the first communication device for coordination.

28 . The first communication device of claim 24 , the operations further comprising:

determining a capability indicator indicating capabilities of the second communication device.

29 . The first communication device of claim 28 , the determining the capability indicator comprising at least one of:

receiving the capability indicator from an access node,

receiving the capability indicator in a sidelink radio resource control (RRC) message,

retrieving the capability indicator preconfigured in a memory of the first communication device, or

receiving the capability indicator in the SCI message.

30 . The first communication device of claim 28 , the capability indicator further comprising a traffic priority level indicator indicating a traffic priority level to which the capabilities of the second communication device apply.

31 . The first communication device of claim 24 , the operations further comprising:

selecting resources from the updated first candidate sidelink resource set for sidelink communication.

32 . The first communication device of claim 31 , the operations further comprising:

transmitting data on the selected resources to the second communication device.