Non regular search space configuration and adaptation
Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for signaling and processing dynamic control channel resources with irregular search space configurations.
1. A method for wireless communications by a user equipment (UE), comprising:
detecting first downlink control information (DCI) in a first physical downlink control channel (PDCCH) monitoring occasion, the first DCI indicating at least one next PDCCH monitoring occasion, one or more search space parameters indicating one or more PDCCH locations within the at least one next PDCCH monitoring occasion, and a time period to monitor the at least one next PDCCH monitoring occasion; and
monitoring the at least one next PDCCH monitoring occasion for at least second DCI, in accordance with the one or more search space parameters, within the time period.
2. The method of claim 1 , wherein:
the at least one next PDCCH monitoring occasion comprises a slot.
3. The method of claim 2 , wherein the one or more search space parameters indicate a pattern of time and frequency resources for the one or more PDCCH locations within the slot.
4. The method of claim 3 , wherein the pattern indicates:
one or more symbol locations within the slot; and
a set of frequency resources for each of the one or more symbol locations.
5. The method of claim 4 , wherein the pattern further indicates a type of location pattern for the set of frequency resources for each of the one or more symbol locations.
6. The method of claim 2 , further comprising:
receiving signaling of different patterns of time and frequency resources for the one or more PDCCH locations, wherein the first DCI further indicates one of the different patterns; and
the method further comprises monitoring the at least one next PDCCH monitoring occasion for the second DCI in accordance with the pattern indicated by the first DCI.
7. The method of claim 6 , wherein the different patterns are signaled via at least one of radio resource control (RRC) signaling, a media access control (MAC) control element (MAC-CE), or downlink control information (DCI).
8. The method of claim 6 , wherein the different patterns are signaled as part of an irregular PDCCH configuration.
9. The method of claim 8 , wherein the irregular PDCCH configuration indicates the different patterns for different PDCCH monitoring occasions.
10. The method of claim 1 , wherein the time period is based on one or more frequency resources reserved for the UE.
11. A method for wireless communications by a network entity, comprising:
transmitting first downlink control information (DCI) to a user equipment (UE) in a first physical downlink control channel (PDCCH) monitoring occasion, the first DCI indicating at least one next PDCCH monitoring occasion, one or more search space parameters indicating one or more PDCCH locations within the at least one next PDCCH monitoring occasion, and a time period to monitor the at least one next PDCCH monitoring occasion; and
transmitting at least second DCI in the at least one next PDCCH monitoring occasion, in accordance with the one or more search space parameters.
12. The method of claim 11 , wherein:
the at least one next PDCCH monitoring occasion comprises a slot.
13. The method of claim 12 , wherein the one or more search space parameters indicate a pattern of time and frequency resources for the one or more PDCCH locations within the slot.
14. The method of claim 12 , wherein the pattern indicates:
one or more symbol locations within the slot; and
a set of frequency resources for each of the one or more symbol locations.
15. The method of claim 14 , wherein the pattern further indicates a type of location pattern for the set of frequency resources for each of the one or more symbol locations.
16. The method of claim 12 , further comprising:
transmitting signaling, to the UE, of different patterns of time and frequency resources for the one or more PDCCH locations, and wherein:
the first DCI further indicates one of the different patterns for the UE to use to monitor for the second DCI in the at least one next PDCCH monitoring occasion.
17. The method of claim 16 , wherein the different patterns are signaled via at least one of radio resource control (RRC) signaling, a media access control (MAC) control element (MAC-CE), or downlink control information (DCI).
18. The method of claim 16 , wherein the different patterns are signaled as part of an irregular PDCCH configuration.
19. The method of claim 18 , wherein the irregular PDCCH configuration indicates the different patterns for different PDCCH monitoring occasions.
20. The method of claim 11 , wherein the time period is based on one or more frequency resources reserved for the UE.
21. The method of claim 11 , further comprising deciding on at least one of a length of a window or what search space parameters to signal via the first DCI based on one or more conditions.
22. The method of claim 21 , wherein the one or more conditions relate to system traffic loading.
23. The method of claim 22 , wherein the at least one of the length of the window or the one or more search space parameters are chosen to adapt an amount search space resources reserved for the UE with respect to the system traffic loading.
24. The method of claim 23 , wherein the at least one of the length of the window or the one or more search space parameters are chosen to:
reserve less search space resources for the UE if the system traffic loading is above a first threshold; and
reserve more search space resources for the UE if the system traffic loading is below a second threshold.
25. An apparatus for wireless communications by a user equipment (UE), comprising:
a memory comprising computer-executable instructions; and
a processor configured to execute the computer-executable instructions and cause the UE to:
detect first downlink control information (DCI) in a first physical downlink control channel (PDCCH) monitoring occasion, the first DCI indicating at least one next PDCCH monitoring occasion, one or more search space parameters indicating one or more PDCCH locations within the at least one next PDCCH monitoring occasion, and a time period to monitor the at least one next PDCCH monitoring occasion; and
monitor the at least one next PDCCH monitoring occasion for at least second DCI, in accordance with the one or more search space parameters, within the time period.
26. The apparatus of claim 25 , wherein:
the at least one next PDCCH monitoring occasion comprises a slot; or
the time period is based on one or more frequency resources reserved for the UE.
27. The apparatus of claim 26 , wherein the one or more search space parameters indicate a pattern of time and frequency resources for the one or more PDCCH locations within the slot.
28. A network entity, comprising:
a memory comprising computer-executable instructions; and
a processor configured to execute the computer-executable instructions and cause the network entity to:
transmit first downlink control information (DCI) to a user equipment (UE) in a first physical downlink control channel (PDCCH) monitoring occasion, the first DCI indicating at least one next PDCCH monitoring occasion, one or more search space parameters indicating one or more PDCCH locations within the at least one next PDCCH monitoring occasion, and a time period to monitor the at least one next PDCCH monitoring occasion; and
transmit at least second DCI in the at least one next PDCCH monitoring occasion, in accordance with the one or more search space parameters.
29. The network entity of claim 28 , wherein:
the at least one next PDCCH monitoring occasion comprises a slot.
30. The network entity of claim 28 , wherein the time period is based on one or more frequency resources reserved for the UE.