Control signaling supporting multi-priority scheduling
The disclosure relates in some aspects to techniques for use in systems where a plurality of devices with different priority levels share a common set of resources for communication (e.g., downlink transmissions). Certain aspects provide a new indication channel and a procedure to signal scheduling information (e.g., priority information). Such information may serve as an indicator for possible new grants. Such information may additionally serve as an indicator for higher-priority scheduling conflicts or include explicit commands that result from conflicts (e.g., conflicts relating to puncturing of resources allocated for transmissions to lower priority devices).
1. A method of wireless communication, comprising:
receiving an indication of a user priority level;
determining a transmission time interval (TTI) corresponding to the user priority level, the TTI defining an interval for monitoring for a scheduling indicator, wherein the scheduling indicator is one of a plurality of scheduling indicators mapped to a plurality of user priority levels and each scheduling indicator is indicative of whether a grant may be available for a user assigned to a respective one of the plurality of user priority levels; and
monitoring for the scheduling indicator according to the determined interval.
2. The method of claim 1 , further comprising:
decoding downlink control information (DCI) if the scheduling indicator indicates that the grant may be available.
3. The method of claim 2 , wherein the DCI comprises:
dynamic parameters that vary across multiple TTIs; and
semi-static parameters that vary only once over multiple TTIs.
4. The method of claim 3 , wherein:
the decoding comprises blind decoding on every instance of the DCI; and
the blind decoding uses hypotheses for the dynamic parameters and hypotheses for the semi-static parameters.
5. The method of claim 3 , wherein:
the decoding comprises coherent decoding on a subset of the DCI; and
the coherent decoding uses hypotheses for the semi-static parameters.
6. The method of claim 2 , wherein the DCI is merged with data for encoding and transmission.
7. The method of claim 1 , further comprising:
determining another interval for monitoring for another scheduling indicator, wherein the other scheduling indicator indicates whether to stop or start decoding for an on-going grant; and
monitoring for the other scheduling indicator according to the other interval.
8. The method of claim 7 , further comprising:
receiving the other scheduling indicator; and temporarily ceasing decoding for the on-going grant if the other scheduling indicator indicates a higher priority than a priority associated with the grant.
9. The method of claim 1 , further comprising:
receiving the scheduling indicator;
determining a length of a bitmap for the received scheduling indicator; and
determining a resource block allocation for the grant based on the length of the bitmap.
10. The method of claim 1 , further comprising:
decoding downlink control information (DCI) according to a scheduling priority index interval associated with a user equipment device.
11. The method of claim 1 , wherein the plurality of scheduling indicators are allocated on a per-resource block basis or a per-sub-band basis.
12. The method of claim 1 , wherein the scheduling indicator is monitored for on a channel that is common to multiple users.
13. The method of claim 1 , wherein the scheduling indicator is monitored for on a channel that is dedicated for a particular user.
14. An apparatus for wireless communication comprising:
a memory device;
a transceiver configured to receive an indication of a user priority level; and
a processing circuit coupled to the memory device and the transceiver, and configured to:
determine a transmission time interval (TTI) corresponding to the user priority level, the TTI defining an interval for monitoring for a scheduling indicator, wherein the scheduling indicator is one of a plurality of scheduling indicators mapped to a plurality of user priority levels and each scheduling indicator is indicative of whether a grant may be available for a user assigned to a respective one of the plurality of user priority levels; and
monitor for the scheduling indicator according to the determined interval.
15. The apparatus of claim 14 , wherein the processing circuit is further configured to:
decode downlink control information (DCI) if the scheduling indicator indicates that the grant may be available.
16. The apparatus of claim 14 , wherein the processing circuit is further configured to:
determine another interval for monitoring for another scheduling indicator, wherein the other scheduling indicator indicates whether to stop or start decoding for an on-going grant; and
monitor for the other scheduling indicator according to the other interval.
17. The apparatus of claim 16 , wherein:
the transceiver is further configured to receive the other scheduling indicator; and
the processing circuit is further configured to temporarily cease decoding for the on-going grant if the other scheduling indicator indicates a higher priority than a priority associated with the grant.
18. The apparatus of claim 14 , wherein the processing circuit is further configured to:
receive the scheduling indicator;
determine a length of a bitmap for the received scheduling indicator; and
determine a resource block allocation for the grant based on the length of the bitmap.
19. An apparatus for wireless communication comprising:
means for receiving an indication of a user priority level;
means for determining a transmission time interval (TTI) corresponding to the user priority level, the TTI defining an interval for monitoring for a scheduling indicator, wherein the scheduling indicator is one of a plurality of scheduling indicators mapped to a plurality of user priority levels and each scheduling indicator is indicative of whether a grant may be available for a user assigned to a respective one of the plurality of user priority levels; and
means for monitoring for the scheduling indicator according to the determined interval.
20. The apparatus of claim 19 , further comprising:
means for decoding downlink control information (DCI) if the scheduling indicator indicates that the grant may be available.
21. The apparatus of claim 19 , further comprising:
means for receiving the scheduling indicator;
means for determining a length of a bitmap for the received scheduling indicator; and
means for determining a resource block allocation for the grant based on the length of the bitmap.
22. A non-transitory computer-readable medium storing computer-executable code for wireless communication including code to:
receive an indication of a user priority level;
determine a transmission time interval (TTI) corresponding to the user priority level, the TTI defining an interval for monitoring for a scheduling indicator, wherein the scheduling indicator is one of a plurality of scheduling indicators mapped to a plurality of user priority levels and each scheduling indicator is indicative of whether a grant may be available for a user assigned to a respective one of the plurality of user priority levels; and
monitor for the scheduling indicator according to the determined interval.