Sidelink congestion control
Wireless communications are described for sidelink congestion control. Sidelink congestion control may be performed based on a processing capability of a wireless device and/or sidelink subcarrier spacing.
1. A method comprising:
receiving, by a wireless device from a base station, an indication of sidelink subcarrier spacing (SCS);
determining, based on measurement during a measurement window, a congestion control parameter, wherein a size of the measurement window is based on:
a processing timing capability of the wireless device; and
the sidelink SCS; and
sending, via a sidelink and based on the congestion control parameter, at least one message.
2. The method of claim 1 , wherein the congestion control parameter comprises a channel busy ratio (CBR).
3. The method of claim 1 , wherein the measurement window comprises at least one of a time domain dimension, a frequency domain dimension, or a spatial domain dimension.
4. The method of claim 1 , further comprising sending, by the wireless device to the base station, an indication of the processing timing capability of the wireless device.
5. 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.
6. The method of claim 1 , wherein the determining the congestion control parameter is further based on a portion of unit resources, of a resource pool, that are associated with respective sidelink measurements that exceed a threshold value.
7. 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.
8. The method of claim 1 , further comprising determining, based on the 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.
9. The method of claim 1 , further comprising:
receiving, by the wireless device from the base station, an indication of a resource pool, wherein the measurement comprises measurement of the resource pool.
10. The method of claim 1 , wherein the measurement comprises measurement of at least one of:
a signal strength;
a signal to noise ratio;
a quantity or percentage of time slots comprising a symbol; or
a quantity or percentage of frequency sub-bands comprising a symbol.
11. The method of claim 1 , wherein the determining the congestion control parameter comprises:
determining a processing time based on at least one of:
the processing timing capability of the wireless device;
the sidelink SCS; or
a resource pool configuration; and
determining, further based on the processing time, the congestion control parameter.
12. The method of claim 1 , further comprising:
determining, by the wireless device, the measurement window.
13. The method of claim 1 , wherein the processing timing capability is further based on a processing speed of the wireless device.
14. The method of claim 1 , wherein the size of the measurement window is further based on:
a release of a wireless technology supported by the wireless device; or
complexity of a wireless operation performed by the wireless device.
15. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, an indication of sidelink subcarrier spacing (SCS);
determine, based on measurement during a measurement window, a congestion control parameter, wherein a size of the measurement window is based on:
a processing timing capability of the wireless device; and
the sidelink SCS; and
send, via a sidelink and based on the congestion control parameter, at least one message.
16. The wireless device of claim 15 , wherein the congestion control parameter comprises a channel busy ratio (CBR).
17. 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.
18. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
send, to the base station, an indication of the processing timing capability of the wireless device.
19. The wireless device of claim 15 , 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.
20. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the congestion control parameter further based on a portion of unit resources, of a resource pool, that are associated with respective sidelink measurements that exceed a threshold value.
21. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the at least one message to a second wireless device, and
wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, from the second wireless device, a response to the at least one message.
22. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
determining, based on the 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.
23. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
receive, from the base station, an indication of a resource pool, and
wherein the measurement comprises measurement of the resource pool.
24. The wireless device of claim 15 , wherein the measurement comprises measurement of at least one of:
a signal strength;
a signal to noise ratio;
a quantity or percentage of time slots comprising a symbol; or
a quantity or percentage of frequency sub-bands comprising a symbol.
25. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, cause the wireless device to determine the congestion control parameter by:
determining a processing time based on at least one of:
the processing timing capability of the wireless device;
the sidelink SCS; or
a resource pool configuration; and
determining, further based on the processing time, the congestion control parameter.
26. 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);
determine, based on measurement during a measurement window, a congestion control parameter, wherein a size of the measurement window is based on:
a processing timing capability of the wireless device; and
the sidelink SCS; and
send, via a sidelink and according to the congestion control parameter, at least one message.
27. The non-transitory computer-readable medium of claim 26 , wherein the congestion control parameter comprises a channel busy ratio (CBR).
28. 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.
29. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, further configure the wireless device to:
send, to the base station, an indication of the processing timing capability of the wireless device.
30. The non-transitory computer-readable medium of claim 26 , 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.
31. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, further configure the wireless device to determine the congestion control parameter further based on a portion of unit resources, of a resource pool, that are associated with respective sidelink measurements that exceed a threshold value.
32. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, configure the wireless device to send 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.
33. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, further configure the wireless device to:
determining, based on the 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.
34. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, further configure the wireless device to:
receive, from the base station, an indication of a resource pool, and
wherein the measurement comprises measurement of the resource pool.
35. The non-transitory computer-readable medium of claim 26 , wherein the measurement comprises measurement of at least one of:
a signal strength;
a signal to noise ratio;
a quantity or percentage of time slots comprising a symbol; or
a quantity or percentage of frequency sub-bands comprising a symbol.
36. The non-transitory computer-readable medium of claim 26 , wherein the instructions, when executed, configure the wireless device to determine the congestion control parameter by:
determining a processing time based on at least one of:
the processing timing capability of the wireless device;
the sidelink SCS; or
a resource pool configuration; and
determining, further based on the processing time, the congestion control parameter.
37. A system comprising:
a base station configured to send an indication of sidelink subcarrier spacing (SCS); and
a wireless device configured to:
determine, based on measurement during a measurement window, a congestion control parameter, wherein a size of the measurement window is based on:
a processing timing capability of the wireless device; and
the sidelink SCS; and
send, via a sidelink and based on the congestion control parameter, at least one message.
38. The system of claim 37 , wherein the wireless device is further configured to send, to the base station, an indication of the processing timing capability of the wireless device.
39. The system of claim 37 , wherein the wireless device is further configured to receive, from the base station, an indication of a resource pool, wherein the measurement comprises measurement of the resource pool.
40. The system of claim 37 , wherein the congestion control parameter comprises a channel busy ratio (CBR), and wherein the measurement comprises measurement of at least one of:
a signal strength;
a signal to noise ratio;
a quantity or percentage of time slots comprising a symbol; or
a quantity or percentage of frequency sub-bands comprising a symbol.
41. The system of claim 37 , wherein the wireless device is configured to determine the congestion control parameter by:
determining a processing time based on at least one of:
the processing timing capability of the wireless device;
the sidelink SCS; or
a resource pool configuration; and
determining, further based on the processing time, the congestion control parameter.