Channel occupancy time (COT) structure indication
This disclosure provides systems, methods and apparatus for a user equipment (UE), operating in a shared spectrum in a connected state or an idle state, to receive a channel occupancy time structure information (COT-SI) which includes one or more of a COT duration, a COT end symbol, and a COT pause indication, in addition to slot format indication for one or more slots. Some aspects described herein define a hierarchical approach to COT structure information (COT-SI) signaling. For example, a UE may be configured with a set of short COT tables using remaining minimum system information (RMSI) signaling and may receive concatenation of COT-SI signaling identifying index values in a control channel corresponding to one or more of the set of COT tables. Based on receiving COT-SI signaling, the UE may communicate in accordance with an occurrence of a COT.
1. A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
receiving a set of channel occupancy time (COT) structure indicators (COT-SIs) identifying a set of parameters of a COT for the UE;
decoding, based on a state of the UE, at least one COT-SI of the set of COT-SIs to determine at least one parameter of the set of parameters of the COT,
wherein the at least one COT-SI includes an indication of a remaining COT duration at a granularity of a sub-carrier spacing reference numerology,
wherein the sub-carrier spacing reference numerology is preconfigured by a radio resource configuration, and
wherein the sub-carrier spacing reference numerology is a sub-carrier spacing for a symbol; and
communicating, in accordance with the at least one parameter, based on decoding the at least one COT-SI.
2. The method of claim 1 , wherein decoding the at least one COT-SI comprises:
decoding, in an idle state, the at least one COT-SI to determine a partial slot format configuration,
wherein the partial slot format configuration includes at least one of:
a COT end symbol,
a COT duration,
whether a slot or symbol is within the COT,
a pause start symbol,
a pause end symbol,
a slot level assignment,
a mini-slot level assignment, or
a time-division duplexing (TDD) switching pattern.
3. The method of claim 1 , wherein the set of COT-SIs is associated with a slot format indication (SFI) of a downlink control information (DCI) for one or more slots in the COT.
4. The method of claim 1 , wherein a remaining minimum system information (RMSI) configures, for receiving the at least one COT-SI, at least one of:
a control resource set (CORESET),
a search space set,
a radio network temporary identifier (RNTI),
a time domain monitoring occasion, or
a COT table for deciphering at least part of a slot format indication in the at least one COT-SI.
5. The method of claim 1 , wherein the at least one COT-SI includes an indicator identifying at least one index value for a COT table, and
wherein the COT table includes COT structure information identifying whether a symbol or slot is within the COT or outside the COT or is subject to a COT pause.
6. The method of claim 1 , wherein the at least one COT-SI includes another indication of at least one of:
a COT duration,
a COT end location,
a pause start location,
a pause end location,
a current location,
a traffic class,
a listen-before-talk (LBT) type, or
a configured grant uplink (CG-UL) parameter.
7. The method of claim 6 , wherein the LBT type is category 2 LBT or category 4 LBT.
8. The method of claim 7 , wherein the LBT type is category 2 LBT based on the COT-SI indicating that a CG-UL slot is within the COT and wherein the COT is a node-acquired COT.
9. The method of claim 6 , wherein the other indication is a presence of the at least one COT-SI.
10. The method of claim 1 , wherein the granularity is based on at least one of:
a slot,
a subframe,
a multiple of symbols,
a duration in seconds, or
the symbol.
11. The method of claim 1 , wherein the sub-carrier spacing is less than or equal to a bandwidth part sub-carrier spacing which is configured for the UE.
12. The method of claim 1 , wherein the remaining COT duration in seconds is preconfigured by another radio resource configuration.
13. The method of claim 1 , further comprising:
receiving a downlink control information (DCI) identifying a concatenation of a plurality of table entries of a COT table from a concatenation of index values in the COT table to indicate COT information for a plurality of slots.
14. The method of claim 1 , wherein the at least one COT-SI includes an indicator identifying at least one index value for a COT table, and
wherein the COT table includes slot format information for an entire portion of the COT.
15. The method of claim 1 , wherein receiving the set of COT-SIs comprises:
receiving, sequentially, a plurality of COT-SIs identifying indices of a plurality of hierarchically provisioned COT tables; and
communicating in accordance with a slot format configuration determined based on the plurality of COT tables.
16. The method of claim 1 , further comprising:
receiving information identifying a concatenation of a plurality of COT table entries of a COT table, and
determining a COT structure based on a received index for the COT table and based on the concatenation of the plurality of COT table entries.
17. The method of claim 1 , wherein the at least one COT-SI identifies a COT structure relating to a plurality of consecutive slots or a plurality of consecutive symbols.
18. The method of claim 1 , wherein decoding the at least one COT-SI comprises:
decoding, in a connected state, a complete slot format configuration.
19. The method of claim 1 , further comprising:
receiving a remaining minimum system information (RMSI) message associated with configuring at least one of:
one or more COT tables,
a control channel monitoring configuration for the at least one COT-SI, or
a description of COT-SI downlink control information (DCI) content.
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 a set of channel occupancy time (COT) structure indicators (COT-SIs) identifying a set of parameters of a COT for the UE;
decode, based on a state of the UE, at least one COT-SI of the set of COT-SIs to determine at least one parameter of the set of parameters of the COT,
wherein the at least one COT-SI includes an indication of a remaining COT duration at a granularity of a sub-carrier spacing reference numerology,
wherein the sub-carrier spacing reference numerology is preconfigured by a radio resource configuration, and
wherein the sub-carrier spacing reference numerology is a sub-carrier spacing for a symbol; and
communicate, in accordance with the at least one parameter, based on decoding the at least one COT-SI.
21. The UE of claim 20 , wherein the one or more processors, when decoding the at least one COT-SI, are configured to:
decode, in an idle state, the at least one COT-SI to determine a partial slot format configuration,
wherein the partial slot format configuration includes at least one of:
a COT end symbol,
a COT duration,
whether a slot or symbol is within the COT,
a pause start symbol,
a pause end symbol,
a slot level assignment,
a mini-slot level assignment, or
a time-division duplexing (TDD) switching pattern.
22. The UE of claim 20 , wherein the set of COT-SIs is associated with a slot format indication (SFI) of a downlink control information (DCI) for one or more slots in the COT.
23. The UE of claim 20 , wherein a remaining minimum system information (RMSI) configures, for receiving the at least one COT-SI, at least one of:
a control resource set (CORESET),
a search space set,
a radio network temporary identifier (RNTI),
a time domain monitoring occasion, or
a COT table for deciphering at least part of a slot format indication in the at least one COT-SI.
24. The UE of claim 20 , wherein the at least one COT-SI includes an indicator identifying at least one index value for a COT table, and
wherein the COT table includes COT structure information identifying whether a symbol or slot is within the COT or outside the COT or is subject to a COT pause.
25. The UE of claim 20 , wherein the at least one COT-SI includes another indication of at least one of:
a COT duration,
a COT end location,
a pause start location,
a pause end location,
a current location,
a traffic class,
a listen-before-talk (LBT) type, or
a configured grant uplink (CG-UL) parameter.
26. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive a set of channel occupancy time (COT) structure indicators (COT-SIs) identifying a set of parameters of a COT for the UE;
decode, based on a state of the UE, at least one COT-SI of the set of COT-SIs to determine at least one parameter of the set of parameters of the COT,
wherein the at least one COT-SI includes an indication of a remaining COT duration at a granularity of a sub-carrier spacing reference numerology,
wherein the sub-carrier spacing reference numerology is preconfigured by a radio resource configuration, and
wherein the sub-carrier spacing reference numerology is a sub-carrier spacing for a symbol; and
communicate, in accordance with the at least one parameter, based on decoding the at least one COT-SI.
27. The non-transitory computer-readable medium of claim 26 , wherein the one or more instructions, to decode the at least one COT-SI, cause the UE to:
decode, in an idle state, the at least one COT-SI to determine a partial slot format configuration,
wherein the partial slot format configuration includes at least one of:
a COT end symbol,
a COT duration,
whether a slot or symbol is within the COT,
a pause start symbol,
a pause end symbol,
a slot level assignment,
a mini-slot level assignment, or
a time-division duplexing (TDD) switching pattern.
28. An apparatus for wireless communication, comprising:
means for receiving, a set of channel occupancy time (COT) structure indicators (COT-SIs) identifying a set of parameters of a COT for the apparatus;
means for decoding, based on a state of the apparatus, at least one COT-SI of the set of COT-SIs to determine at least one parameter of the set of parameters of the COT,
wherein the at least one COT-SI includes an indication of a remaining COT duration at a granularity of a sub-carrier spacing reference numerology,
wherein the sub-carrier spacing reference numerology is preconfigured by a radio resource configuration, and
wherein the sub-carrier spacing reference numerology is a sub-carrier spacing for a symbol; and
means for communicating, in accordance with the at least one parameter, based on decoding the at least one COT-SI.
29. The apparatus of claim 28 , wherein the means for decoding the at least one COT-SI comprises:
means for decoding, in an idle state, the at least one COT-SI to determine a partial slot format configuration,
wherein the partial slot format configuration includes at least one of:
a COT end symbol,
a COT duration,
whether a slot or symbol is within the COT,
a pause start symbol,
a pause end symbol,
a slot level assignment,
a mini-slot level assignment, or
a time-division duplexing (TDD) switching pattern.
30. The UE of claim 20 , wherein the at least one COT-SI includes an indicator identifying at least one index value for a COT table, and
wherein the COT table includes slot format information for an entire portion of the COT.