Configuring listen before talk bandwidth monitoring
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of respective combinations of listen before talk (LBT) bandwidths for each of one or more downlink monitoring occasions. The UE may monitor for downlink communications in the respective combinations of LBT bandwidths for each of the one or more downlink monitoring occasions. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, via a radio resource control (RRC) communication, a wakeup signal (WUS) comprising a plurality of bits providing an indication of combinations of listen before talk (LBT) bandwidths for a plurality of downlink monitoring occasions and a plurality of search space configurations,
wherein the indication includes:
a first combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a first subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a first search space configuration of the plurality of search space configurations, and
a second combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a second subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a second search space configuration of the plurality of search space configurations,
wherein at least one of the first subset of the at least two downlink monitoring occasions is different from at least one of the second subset of the at least two downlink monitoring occasions; and
monitoring for downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations.
2. The method of claim 1 , wherein the indication of the combinations of LBT bandwidths explicitly identifies each LBT bandwidth included in each of the combinations of LBT bandwidths.
3. The method of claim 1 , wherein the indication of the combinations of LBT bandwidths implicitly identifies each LBT bandwidth included in the combinations of LBT bandwidths by identifying one or more LBT bandwidths, of LBT bandwidths included in and the combinations of LBT bandwidths, that the UE is to refrain from monitoring.
4. The method of claim 3 , wherein monitoring for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions comprises at least one of:
monitoring, in at least one downlink monitoring occasion of the first subset of the at least two downlink monitoring occasions, the first combination of the at least two LBT bandwidths configured for the UE other than the one or more LBT bandwidths that the UE is to refrain from monitoring in the first subset of at least two downlink monitoring occasions; or
monitoring, in at least one downlink monitoring occasion of the second subset of the at least two downlink monitoring occasions, the second combination of the at least two LBT bandwidths configured for the UE other than the one or more LBT bandwidths that the UE is to refrain from monitoring in the second subset of the at least two downlink monitoring occasions.
5. The method of claim 1 , wherein a quantity of the plurality of search space configurations is based at least in part on a quantity of available search space configurations for a shared radio frequency band; and
wherein the quantity of available search space configurations for the shared radio frequency band is greater than a quantity of available search space configurations for a licensed radio frequency band.
6. The method of claim 1 , wherein monitoring for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations comprises:
monitoring for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations during a discontinuous reception (DRX) on duration associated with the WUS.
7. The method of claim 1 , wherein the first combination of the at least two LBT bandwidths is associated with a serving cell of a network entity, and wherein the second combination of the at least two LBT bandwidths is associated with the serving cell or another serving cell of the network entity.
8. The method of claim 1 , wherein monitoring for downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations comprises:
monitoring, for the downlink communications, frequency domain resources included in each of the combinations of LBT bandwidths associated with the plurality of downlink monitoring occasions.
9. The method of claim 1 , wherein the plurality of search space configurations includes a third search space configuration indicating a third combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for a third subset of the plurality of downlink monitoring occasions.
10. The method of claim 1 , wherein the plurality of bits include a first bit, indicating the first combination of the at least two LBT bandwidths, and a second bit, indicating a second combination of the at least two LBT bandwidths.
11. The method of claim 1 , wherein the first combination of the at least two LBT bandwidths and the second combination of the at least two LBT bandwidths are associated with a same serving cell.
12. A method of wireless communication performed by a network entity, comprising:
configuring an indication of combinations of listen before talk (LBT) bandwidths for a plurality of downlink monitoring occasions and a plurality of search space configurations,
wherein the indication includes:
a first combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a first subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a first search space configuration of the plurality of search space configurations, and
a second combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a second subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a second search space configuration of the plurality of search space configurations,
wherein at least one of the first subset of the at least two downlink monitoring occasions is different from at least one of the second subset of the at least two downlink monitoring occasions; and
transmitting, via a radio resource control (RRC) communication, a wakeup signal (WUS) comprising a plurality of bits that provide the indication of the combinations of LBT bandwidths to a user equipment (UE).
13. The method of claim 12 , wherein configuring the indication of the combinations of LBT bandwidths comprises:
configuring the indication of the combinations of LBT bandwidths to explicitly identify each LBT bandwidth included in each of the combinations of LBT bandwidths.
14. The method of claim 12 , wherein configuring the indication of the combinations of LBT bandwidths comprises:
configuring the indication of the combinations of LBT bandwidths to implicitly identify each LBT bandwidth included in the combinations of LBT bandwidths by identifying one or more LBT bandwidths, of LBT bandwidths included in the combinations of LBT bandwidths, that the UE is to refrain from monitoring.
15. The method of claim 12 , wherein a quantity of the plurality of search space configurations is based at least in part on a quantity of available search space configurations for a shared radio frequency band; and
wherein the quantity of available search space configurations for the shared radio frequency band is greater relative to a quantity of available search space configurations for a licensed radio frequency band.
16. The method of claim 12 , wherein the first combination of the at least two LBT bandwidths is associated with a serving cell of the network entity, and wherein the second combination of the at least two LBT bandwidths is associated with the serving cell or another serving cell of the network entity.
17. The method of claim 12 , wherein the plurality of search space configurations includes a third search space configuration indicating a third combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for a third subset of the plurality of downlink monitoring occasions.
18. The method of claim 12 , wherein the plurality of bits include a first bit, indicating the first combination of the at least two LBT bandwidths, and a second bit, indicating a second combination of the at least two LBT bandwidths.
19. The method of claim 12 , wherein the first combination of the at least two LBT bandwidths and the second combination of the at least two LBT bandwidths are associated with a same serving cell.
20. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
receive, via a radio resource control (RRC) communication, a wakeup signal (WUS) comprising a plurality of bits providing an indication of combinations of listen before talk (LBT) bandwidths for a plurality of downlink monitoring occasions and a plurality of search space configurations,
wherein the indication includes:
a first combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a first subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a first search space configuration of the plurality of search space configurations, and
a second combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a second subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a second search space configuration of the plurality of search space configurations,
wherein at least one of the first subset of the at least two downlink monitoring occasions is different from at least one of the second subset of the at least two downlink monitoring occasions; and
monitor for downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations.
21. The UE of claim 20 , wherein the indication of the combinations of LBT bandwidths explicitly identifies each LBT bandwidth included in each of the combinations of LBT bandwidths.
22. The UE of claim 20 , wherein the one or more processors, to monitor for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations, are configured to:
monitor for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations monitor for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations during a discontinuous reception (DRX) on duration associated with the WUS.
23. The UE of claim 20 , wherein the first combination of the at least two LBT bandwidths is associated with a serving cell of a network entity, and wherein the second combination of the at least two LBT bandwidths is associated with the serving cell or another serving cell of the network entity.
24. The UE of claim 20 , wherein the one or more processors, to monitor for the downlink communications in the combinations of LBT bandwidths for the plurality of downlink monitoring occasions and the plurality of search space configurations, are configured to:
monitor, for the downlink communications, frequency domain resources included in each of the combinations of LBT bandwidths associated with the plurality of downlink monitoring occasions.
25. The UE of claim 20 , wherein the plurality of bits include a first bit, indicating the first combination of the at least two LBT bandwidths, and a second bit, indicating a second combination of the at least two LBT bandwidths.
26. The UE of claim 20 , wherein the first combination of the at least two LBT bandwidths and the second combination of the at least two LBT bandwidths are associated with a same serving cell.
27. A network entity for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
configure an indication of combinations of listen before talk (LBT) bandwidths for a plurality of downlink monitoring occasions and a plurality of search space configurations,
wherein the indication includes:
a first combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a first subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions and for a first search space configuration of the plurality of search space configurations, and
a second search space configuration indicating a second combination of at least two LBT bandwidths, of the combinations of LBT bandwidths, for each of a second subset of at least two downlink monitoring occasions of the plurality of downlink monitoring occasions,
wherein at least one of the first subset of the at least two downlink monitoring occasions is different from at least one of the second subset of the at least two downlink monitoring occasions and for a second search space configuration of the plurality of search space configurations; and
transmit, via a radio resource control (RRC) communication, a wakeup signal (WUS) comprising a plurality of bits that provide the indication of the combinations of LBT bandwidths to a user equipment (UE).
28. The network entity of claim 27 , wherein the first combination of the at least two LBT bandwidths is associated with a serving cell of the network entity, and wherein the second combination of the at least two LBT bandwidths is associated with the serving cell or another serving cell of the network entity.
29. The network entity of claim 27 , wherein the plurality of bits include a first bit, indicating the first combination of the at least two LBT bandwidths, and a second bit, indicating a second combination of the at least two LBT bandwidths.
30. The network entity of claim 27 , wherein the first combination of the at least two LBT bandwidths and the second combination of the at least two LBT bandwidths are associated with a same serving cell.