Systems and methods of handling collisions between multiple semi-persistent grants

1. A method performed by a wireless device in a wireless communications system, comprising:

obtaining selection criteria that is predefined or configured as being the criteria by which both the wireless device and a network node or another wireless device selects one of multiple activated semi-persistent configurations assigned to the wireless device responsive to determining that the multiple configurations have granted a same radio resource comprising a same frequency resource;

selecting one of the multiple configurations based on the selection criteria; and

transmitting or receiving on that radio resource in accordance with the selected configuration.

2. The method of claim 1 , wherein the selection criteria is based on at least one of:

an index that identifies each configuration;

a size of a grant of radio resources for each configuration; and

a priority of each configuration.

3. The method of claim 1 , wherein said selecting includes selecting one of the multiple configurations that has a lowest or highest value of an index that identifies each configuration.

4. The method of claim 1 , wherein said selecting includes selecting one of the multiple configurations that has a lowest or highest value of an sps-ConfigIndex parameter that is used to identify each multiple configuration.

5. The method of claim 1 , wherein said selecting includes selecting one of the multiple configurations that has a largest size of a grant of radio resources.

6. The method of claim 1 , wherein said selecting includes selecting one of the multiple configurations that has a highest priority or is prioritized over the other configurations.

7. The method of claim 1 , further comprising:

receiving, from the network node or the other wireless device, an indication of the selection criteria.

8. The method of claim 1 , further comprising:

enabling the wireless device for semi-persistent scheduling of radio resources.

9. The method of claim 1 , further comprising:

determining to enable semi-persistent scheduling of radio resources for wireless communications between the wireless device and the other wireless device; and

transmitting, to the other wireless device, an indication to enable the other wireless device for semi-persistent scheduling of radio resources.

10. The method of claim 1 , further comprising:

determining the selection criteria for the other wireless device associated with peer-to-peer communications between the wireless device and the other wireless device; and

transmitting, to the other wireless device, an indication of the selection criteria.

11. The method of claim 1 , wherein the multiple configurations are related to a semi-persistent scheduler (SPS) protocol.

12. The method of claim 1 , wherein each configuration has a different type of data traffic.

13. The method of claim 1 , wherein data traffic of each configuration has a different periodicity.

14. The method of claim 1 , wherein the radio resource is used to carry periodic data traffic.

15. The method of claim 1 , wherein the radio resource is a time and frequency resource.

16. The method of claim 1 , wherein the radio resource is in a certain transmission time interval (TTI).

17. The method of claim 1 , wherein the network node is a base station, the wireless device is a user equipment (UE), and the system is a terrestrial cellular network.

18. The method of claim 1 , wherein the wireless device and the other wireless device are user equipment (UE) and the system is a device-to-device (D2D) wireless communications system.

19. The method of claim 18 , wherein the D2D wireless communications system is a sidelink wireless communications system.

20. The method of claim 1 , further comprising:

receiving, from the network node or the other wireless device, an indication of the selection criteria by which both the wireless device and the network node or the other wireless device selects one of multiple activated semi-persistent configurations assigned to the wireless device responsive to determining that the multiple configurations have granted the same radio resource comprising a same frequency resource.

21. The method of claim 1 , wherein the same radio resource is a radio resource in a same TTI or in a same subframe.

22. A wireless device, comprising:

at least one processor and a memory, the memory comprising instructions executable by the at least one processor whereby the wireless device is configured to:

obtain selection criteria that is predefined or configured as being the criteria by which both the wireless device and a network node or another wireless device selects one of multiple activated semi-persistent configurations assigned to the wireless device responsive to determining that the multiple configurations have granted a same radio resource comprising a same frequency resource;

select one of the multiple configurations based on the selection criteria; and

transmit or receive on that radio resource in accordance with the selected configuration.

23. A method performed by a network node in a wireless communications system, comprising:

obtaining selection criteria that is predefined or configured as being the criteria by which both the network node and a wireless device selects one of multiple activated semi-persistent configurations assigned to the wireless device responsive to determining that the multiple configurations have granted a same radio resource comprising a same frequency resource;

selecting one of the multiple configurations based on the selection criteria; and

transmitting or receiving, to or from the wireless device, on that radio resource in accordance with the selected configuration.

24. The method of claim 23 , wherein the selection criteria is based on at least one of:

an index that identifies each configuration;

a size of a grant of radio resources for each configuration; and

a priority of each configuration.

25. The method of claim 23 , wherein said selecting includes selecting one of the multiple configurations that has a lowest or highest value of an index that identifies each configuration.

26. The method of claim 23 , wherein said selecting includes selecting one of the multiple configurations that has a lowest or highest value of an sps-ConfigIndex parameter that is used to identify each multiple configuration.

27. The method of claim 23 , wherein said selecting includes selecting one of the multiple configurations that has a largest size of a grant of radio resources.

28. The method of claim 23 , wherein said selecting includes selecting one of the multiple configurations that has a highest priority or is prioritized over the other configurations.

29. The method of claim 23 , further comprising:

determining to enable the network node and the wireless device for semi-persistent scheduling of radio resources for wireless communications between the network node and the wireless device; and

transmitting, to the wireless device, an indication to enable semi-persistent scheduling of radio resources.

30. The method of claim 23 , further comprising:

determining the selection criteria for the wireless device; and

transmitting, to the wireless device, an indication of the selection criteria.

31. The method of claim 23 , further comprising:

in response to determining that the multiple configurations assigned to the wireless device have granted the same radio resource, assigning, to one or more other wireless devices, that radio resource for those configurations that are not selected for transmission or reception on that radio resource.

32. The method of claim 23 , further comprising:

in response to determining that the multiple configurations assigned to the wireless device have granted the same radio resource, assigning, to the wireless device, one or more other radio resources that is capable of carrying data that is intended for transmission or reception on that same radio resource for each multiple configuration.

33. The method of claim 32 , further comprising:

prioritizing the one or more other radio resources as having a higher priority than the radio resource.

34. The method of claim 23 , wherein the same radio resource is a radio resource in a same TTI or in a same subframe.

35. A network node, comprising:

at least one processor and a memory, the memory comprising instructions executable by the at least one processor whereby the network node is configured to:

obtain selection criteria that is predefined or configured as being the criteria by which both the network node and a wireless device selects one of multiple activated semi-persistent configurations assigned to the wireless device responsive to determining that the multiple configurations have granted a same radio resource comprising a same frequency resource;

select one of the multiple configurations based on the selection criteria; and

transmit or receive, to or from the wireless device, on that radio resource in accordance with the selected configuration.