Indication of scheduling delays for a shared channel with BWP switching in higher frequency bands
Methods, apparatuses, and computer readable media for indicating a time gap in case of a BWP switch are provided. A base station may transmit to a UE, and the UE may receive from the base station, an indication of a BWP switch from a first BWP to a second BWP. The UE and the base station may communicate with each other via a PDSCH or a PUSCH, in the second BWP based on a time gap. The time gap may be based on at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch. The time gap may have a duration that is at least as long as a first duration of a BWP switch delay associated with switching from the first BWP to the second BWP.
1. A method of wireless communication at a user equipment (UE), comprising:
transmitting, to a base station, a request for a bandwidth part switch from a first BWP to a second BWP, wherein the request indicates a BWP switch delay;
receiving, from the base station, an indication of the BWP switch from the first BWP to the second BWP; and
communicating with the base station, via a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), in the second BWP based on in accordance with a time gap, the time gap being associated with at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch, the time gap having a duration that is at least as long as a first duration of the BWP switch delay associated with switching from the first BWP to the second BWP, wherein the BWP switch delay is associated with a frequency location difference between a first starting resource block (RB) of the first BWP and a second starting RB of the second BWP.
2. The method of claim 1 , wherein the BWP switch comprises a switch from a first subcarrier spacing (SCS) to a second SCS.
3. The method of claim 1 , wherein the indication is received in one or more downlink control information (DCI) messages, and wherein:
the one or more DCI messages schedule the PDSCH, and the time gap corresponds to a K0 delay; or
the one or more DCI messages schedule the PUSCH, and the time gap corresponds to a K2 delay.
4. The method of claim 1 , wherein:
the indication is received in one or more downlink control information (DCI) messages,
the first time parameter is the time gap,
the second time parameter is the BWP switch delay, and
the one or more DCI messages consist of a single DCI message that indicates the BWP switch and the time gap.
5. The method of claim 1 , wherein:
the indication is received in one or more downlink control information (DCI) messages,
the first time parameter corresponds to a first time delay and a first quantity of slots,
the second time parameter corresponds to a second time delay associated with based on a numerology-dependent offset,
the one or more DCI messages consist of a single DCI message that indicates the BWP switch and the first time delay,
the first time delay corresponds to the first quantity of slots having lengths that are each associated with either the first BWP or the second BWP, and
the time gap includes a sum of the first time delay and the numerology-dependent offset.
6. The method of claim 1 , wherein:
the indication is received in one or more downlink control information (DCI) messages,
the second time parameter corresponds to the BWP switch delay,
the one or more DCI messages consist of a first DCI message indicating the BWP switch from the first BWP to the second BWP and a second DCI message scheduling the one of the PDSCH or the PUSCH, and
a time lapse between the first DCI message and the second DCI message is at least as long as the BWP switch delay associated with the BWP switch from the first BWP to the second BWP.
7. The method of claim 1 , wherein:
the first time parameter corresponds to a first time delay and a first quantity of slots,
the second time parameter corresponds to a multiplier associated with a subcarrier spacing (SCS) for the PDSCH or the PUSCH,
the first time delay corresponds to the first quantity of slots having lengths that are each associated with either the first BWP or the second BWP, and
the time gap comprises a product of a total length of the first time delay and the multiplier.
8. The method of claim 1 , wherein:
the first time parameter corresponds to a first quantity of slots,
the second time parameter corresponds to a reference slot size, and
the time gap is associated with the first time parameter corresponding to the first quantity of slots and the reference slot size.
9. The method of claim 1 , wherein:
the indication is received in one or more downlink control information (DCI) messages,
the one or more DCI messages consist of a single DCI message,
the first time parameter corresponds to a first quantity of slots,
the second time parameter is based on a numerology of a physical downlink control channel (PDCCH) via which the single DCI message is received, and
the time gap is associated with the first time parameter corresponding to the first quantity of slots and the numerology of the PDCCH.
10. The method of claim 1 , wherein the BWP switch delay is associated with a reference slot size.
11. The method of claim 1 , wherein the BWP switch delay is associated with a bandwidth of one or more of the first BWP or the second BWP.
12. An apparatus for wireless communication at a user equipment (UE), comprising:
at least one processor; and
at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to cause the UE to:
transmit, to a base station, a request for a bandwidth part switch from a first BWP to a second BWP, wherein the request indicates a BWP switch delay;
receive, from the base station, an indication of the BWP switch from the first BWP to the second BWP; and
communicate with the base station, via a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), in the second BWP in accordance with a time gap, the time gap being associated with at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch, the time gap having a duration that is at least as long as a first duration of the BWP switch delay associated with switching from the first BWP to the second BWP, wherein the BWP switch delay is associated with a frequency location difference between a first starting resource block (RB) of the first BWP and a second starting RB of the second BWP.
13. The apparatus of claim 12 , wherein the BWP switch comprises a switch from a first subcarrier spacing (SCS) to a second SCS.
14. The apparatus of claim 12 , further comprising a transceiver coupled to the at least one processor.
15. A method of wireless communication at a base station, comprising:
receiving, from a user equipment (UE), a request for a bandwidth part (BWP) switch from a first BWP to a second BWP, wherein the request indicates a BWP switch delay;
transmitting, to the UE, an indication of the BWP switch from the first BWP to the second BWP; and
communicating with the UE, via a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), in the second BWP in accordance with a time gap, the time gap being associated with at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch, the time gap having a duration that is at least as long as a first duration of the BWP switch delay associated with switching from the first BWP to the second BWP, wherein the BWP switch delay is associated with a frequency location difference between a first starting resource block (RB) of the first BWP and a second starting RB of the second BWP.
16. The method of claim 15 , wherein the BWP switch comprises a switch from a first subcarrier spacing (SCS) to a second SCS.
17. The method of claim 15 , wherein the indication is transmitted in one or more downlink control information (DCI) messages, and wherein:
the one or more DCI messages schedule the PDSCH, and the time gap corresponds to a K0 delay; or
the one or more DCI messages schedule the PUSCH, and the time gap corresponds to a K2 delay.
18. The method of claim 15 , wherein:
the indication is transmitted in one or more downlink control information (DCI) messages,
the first time parameter is the time gap,
the second time parameter is the BWP switch delay, and
the one or more DCI messages consist of a single DCI message that indicates the BWP switch and the time gap.
19. The method of claim 15 , wherein:
the indication is transmitted in one or more downlink control information (DCI) messages,
the first time parameter corresponds to a first time delay and a first quantity of slots,
the second time parameter corresponds to a second time delay associated with a numerology-dependent offset,
the one or more DCI messages consist of a single DCI message that indicates the BWP switch and the first time delay,
the first time delay corresponds to the first quantity of slots having lengths that are each associated with either the first BWP or the second BWP, and
the time gap includes a sum of the first time delay and the numerology-dependent offset.
20. The method of claim 15 , wherein:
the indication is transmitted in one or more downlink control information (DCI) messages,
the second time parameter corresponds to the BWP switch delay,
the one or more DCI messages consist of a first DCI message indicating the BWP switch from the first BWP to the second BWP and a second DCI message scheduling the one of the PDSCH or the PUSCH, and
a time lapse between the first DCI message and the second DCI message is at least as long as the BWP switch delay associated with the BWP switch from the first BWP to the second BWP.
21. The method of claim 15 , wherein:
the first time parameter corresponds to a first time delay and a first quantity of slots,
the second time parameter corresponds to a multiplier associated with a subcarrier spacing (SCS) for the PDSCH or the PUSCH,
the first time delay corresponds to the first quantity of slots having lengths that are each associated with either the first BWP or the second BWP, and
the time gap comprises a product of a total length of the first time delay and the multiplier.
22. The method of claim 15 , wherein:
the first time parameter corresponds to a first quantity of slots,
the second time parameter corresponds to a reference slot size, and
the time gap is associated with the first time parameter corresponding to the first quantity of slots and the reference slot size.
23. The method of claim 15 , wherein:
the indication is transmitted in one or more downlink control information (DCI) messages,
the one or more DCI messages consist of a single DCI message,
the first time parameter corresponds to a first quantity of slots,
the second time parameter is based on a numerology of a physical downlink control channel (PDCCH) via which the single DCI message is transmitted, and
the time gap is associated with the first time parameter corresponding to the first quantity of slots and the numerology of the PDCCH.
24. The method of claim 15 , wherein the BWP switch delay is associated with a reference slot size.
25. The method of claim 15 , wherein the BWP switch delay is associated with a bandwidth of one or more of the first BWP or the second BWP.
26. An apparatus for wireless communication at a base station, comprising:
at least one processor; and
at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to cause the base station to:
receive, from a user equipment (UE), a request for a bandwidth part switch from a first BWP to a second BWP, wherein the request indicates a BWP switch delay;
transmit, to the UE, an indication of the BWP switch from the first BWP to the second BWP; and
communicate with the UE, via a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), in the second BWP in accordance with a time gap, the time gap being associated with at least one of a first time parameter associated with the indication or a second time parameter associated with the BWP switch, the time gap having a duration that is at least as long as a first duration of the BWP switch delay associated with switching from the first BWP to the second BWP, wherein the BWP switch delay is associated with a frequency location difference between a first starting resource block (RB) of the first BWP and a second starting RB of the second BWP.
27. The apparatus of claim 26 , wherein the BWP switch comprises a switch from a first subcarrier spacing (SCS) to a second SCS.
28. The apparatus of claim 26 , further comprising a transceiver coupled to the at least one processor.