Sidelink congestion control

1. A method comprising:

receiving, by a wireless device from a base station, an indication of sidelink subcarrier spacing (SCS); and

sending at least one message via a sidelink and according to at least one congestion control parameter, wherein the at least one congestion control parameter is associated with a processing time that is based on:

a processing capability of the wireless device; and

the sidelink SCS.

2. The method of claim 1 , wherein the processing time comprises a delay between a first time, when a measurement window for the at least one congestion control parameter ends, and a second time when the at least one congestion control parameter is generated based on a measurement of a communications channel performed in the measurement window.

3. The method of claim 1 , wherein the at least one congestion control parameter comprises a channel busy ratio (CBR).

4. The method of claim 1 , further comprising:

determining a size of a measurement window, for the at least one congestion control parameter, based on:

the processing capability of the wireless device; and

the sidelink SCS; and

determining, based on a measurement performed during the measurement window, the at least one congestion control parameter.

5. The method of claim 4 , wherein the measurement window comprises at least one of a time domain dimension, a frequency domain dimension, or a spatial domain dimension.

6. The method of claim 1 , further comprising sending, by the wireless device to the base station, an indication of the processing capability of the wireless device.

7. The method of claim 1 , wherein the sidelink comprises at least one of a data channel, a control channel, a broadcast channel, a shared channel, a discovery channel, a subchannel, a bandwidth part, a synchronization signal block, a resource pool, a resource unit, an orthogonal frequency division multiplexing (OFDM) symbol, a sidelink slot, a spatial resource, or a carrier.

8. The method of claim 1 , further comprising determining the at least one congestion control parameter, wherein the determining the at least one congestion control parameter is based on a portion of unit resources, of a resource pool, associated with a sidelink measurement, wherein the sidelink measurement exceeds a threshold value.

9. The method of claim 1 , wherein the sending the at least one message comprises sending, by the wireless device to a second wireless device, the at least one message, and wherein the method further comprises receiving, by the wireless device from the second wireless device, a response to the at least one message.

10. The method of claim 1 , further comprising determining, based on the at least one congestion control parameter, at least one of:

a transmission rate;

a quantity of hybrid automatic repeat request (HARM) transmissions;

a quantity of transmission resources;

a modulation and coding scheme;

a quantity of spatial layers; or

a transmission power.

11. The method of claim 1 , further comprising:

receiving, by the wireless device from the base station, an indication of a resource pool, wherein the at least one congestion control parameter is based on a measurement of the resource pool.

12. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, configure the wireless device to:

receive, from a base station, an indication of sidelink subcarrier spacing (SCS); and

send at least one message via a sidelink and according to at least one congestion control parameter, wherein the at least one congestion control parameter is associated with a processing time that is based on:

a processing capability of the wireless device; and

the sidelink SCS.

13. The wireless device of claim 12 , wherein the processing time comprises a delay between a first time, when a measurement window for the at least one congestion control parameter ends, and a second time when the at least one congestion control parameter is generated based on the measurement window.

14. The wireless device of claim 12 , wherein the at least one congestion control parameter comprises a channel busy ratio (CBR).

15. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:

determine a size of a measurement window, for the at least one congestion control parameter, based on:

the processing capability of the wireless device; and

the sidelink SCS; and

determine, based on a measurement performed during the measurement window, the at least one congestion control parameter.

16. The wireless device of claim 15 , wherein the measurement window comprises at least one of a time domain dimension, a frequency domain dimension, or a spatial domain dimension.

17. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:

send, to the base station, an indication of the processing capability of the wireless device.

18. The wireless device of claim 12 , wherein the sidelink comprises at least one of a data channel, a control channel, a broadcast channel, a shared channel, a discovery channel, a subchannel, a bandwidth part, a synchronization signal block, a resource pool, a resource unit, an orthogonal frequency division multiplexing (OFDM) symbol, a sidelink slot, a spatial resource, or a carrier.

19. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to, based on a portion of unit resources, of a resource pool, associated with a sidelink measurement, determine the at least one congestion control parameter, wherein the sidelink measurement exceeds a threshold value.

20. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, configure the wireless device to send the at least one message by sending the at least one message to a second wireless device, and wherein the instructions, when executed by the one or more processors, further configure the wireless device to receive, from the second wireless device, a response to the at least one message.

21. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to determine, based on the at least one congestion control parameter, at least one of:

a transmission rate;

a quantity of hybrid automatic repeat request (HARQ) transmissions;

a quantity of transmission resources;

a modulation and coding scheme;

a quantity of spatial layers; or

a transmission power.

22. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:

receive, from the base station, an indication of a resource pool, wherein the at least one congestion control parameter is based on a measurement of the resource pool.

23. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

receive, from a base station, an indication of sidelink subcarrier spacing (SCS); and

send at least one message via a sidelink and according to at least one congestion control parameter, wherein the at least one congestion control parameter is associated with a processing time that is based on:

a processing capability of the wireless device; and

the sidelink SCS.

24. The non-transitory computer-readable medium of claim 23 , wherein the processing time comprises a delay between a first time, when a measurement window for the at least one congestion control parameter ends, and a second time when the at least one congestion control parameter is generated based on the measurement window.

25. The non-transitory computer-readable medium of claim 23 , wherein the at least one congestion control parameter comprises a channel busy ratio (CBR).

26. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:

determine a size of a measurement window, for the at least one congestion control parameter, based on:

the processing capability of the wireless device; and

the sidelink SCS; and

determine, based on a measurement performed during the measurement window, the at least one congestion control parameter.

27. The non-transitory computer-readable medium of claim 26 , wherein the measurement window comprises at least one of a time domain dimension, a frequency domain dimension, or a spatial domain dimension.

28. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:

send, to the base station, an indication of the processing capability of the wireless device.

29. The non-transitory computer-readable medium of claim 23 , wherein the sidelink comprises at least one of a data channel, a control channel, a broadcast channel, a shared channel, a discovery channel, a subchannel, a bandwidth part, a synchronization signal block, a resource pool, a resource unit, an orthogonal frequency division multiplexing (OFDM) symbol, a sidelink slot, a spatial resource, or a carrier.

30. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:

based on a portion of unit resources, of a resource pool, associated with a sidelink measurement, determine the at least one congestion control parameter, wherein the sidelink measurement exceeds a threshold value.

31. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, configure the wireless device to send the at least one message by sending the at least one message to a second wireless device, and

wherein the instructions, when executed, further configure the wireless device to receive, from the second wireless device, a response to the at least one message.

32. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to determine, based on the at least one congestion control parameter, at least one of:

a transmission rate;

a quantity of hybrid automatic repeat request (HARQ) transmissions;

a quantity of transmission resources;

a modulation and coding scheme;

a quantity of spatial layers; or

a transmission power.

33. The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:

receive, from the base station, an indication of a resource pool, wherein the at least one congestion control parameter is based on a measurement of the resource pool.

34. A system comprising:

a wireless device; and

a base station,

wherein the base station is configured to:

send, to the wireless device, an indication of sidelink subcarrier spacing (SCS), and

wherein the wireless device is configured to:

send at least one message via a sidelink and according to at least one congestion control parameter, wherein the at least one congestion control parameter is associated with a processing time that is based on:

a processing capability of the wireless device; and

the sidelink SCS.

35. The system of claim 34 , wherein the processing time comprises a delay between a first time, when a measurement window for the at least one congestion control parameter ends, and a second time when the at least one congestion control parameter is generated based on the measurement window.

36. The system of claim 34 , wherein the at least one congestion control parameter comprises a channel busy ratio (CBR).

37. The system of claim 34 , wherein the wireless device is further configured to:

determine a size of a measurement window, for the at least one congestion control parameter, based on:

the processing capability of the wireless device; and

the sidelink SCS; and

determine, based on a measurement performed during the measurement window, the at least one congestion control parameter.

38. The system of claim 37 , wherein the measurement window comprises at least one of a time domain dimension, a frequency domain dimension, or a spatial domain dimension.

39. The system of claim 34 , wherein the wireless device is further configured to:

send, to the base station, an indication of the processing capability of the wireless device.

40. The system of claim 34 , wherein the sidelink comprises at least one of a data channel, a control channel, a broadcast channel, a shared channel, a discovery channel, a subchannel, a bandwidth part, a synchronization signal block, a resource pool, a resource unit, an orthogonal frequency division multiplexing (OFDM) symbol, a sidelink slot, a spatial resource, or a carrier.

41. The system of claim 34 , wherein the wireless device is further configured to, based on a portion of unit resources, of a resource pool, associated with a sidelink measurement, determine the at least one congestion control parameter, wherein the sidelink measurement exceeds a threshold value.

42. The system of claim 34 , wherein the wireless device is configured to send the at least one message to a second wireless device, and

wherein the wireless device is further configured to receive, from the second wireless device, a response to the at least one message.

43. The system of claim 34 , wherein the wireless device is further configured to determine, based on the at least one congestion control parameter, at least one of:

a transmission rate;

a quantity of hybrid automatic repeat request (HARQ) transmissions;

a quantity of transmission resources;

a modulation and coding scheme;

a quantity of spatial layers; or

a transmission power.

44. The system of claim 34 , wherein the base station is further configured to:

send, to the wireless device, an indication of a resource pool, wherein the at least one congestion control parameter is based on a measurement of the resource pool.