Considerations on bandwidth part (BWP) management for ultra-reliability low latency communication (URLLC)
Certain aspects of the present disclosure relate generally to wireless communications systems, and more particularly, to improving efficiency of bandwidth part (BWP) switching.
1. A method for wireless communications by a user equipment (UE), comprising:
receiving signaling for a bandwidth part (BWP) switch, from a first BWP to a second BWP, to process traffic for transmission to or from the UE; and
applying the BWP switch within a same slot transmission time interval (TTI) in which the signaling is received to process the traffic, wherein applying the BWP switch comprises at least one of: updating a BWP filtering or fast Fourier transform (FFT) adjustment at a baseband level, wherein the updating is performed at a mini-slot level such that the BWP switch takes place before an end of the same slot TTI.
2. The method of claim 1 , wherein applying the BWP switch within the slot TTI to process the traffic includes applying the BWP switch at a symbol level.
3. The method of claim 1 , wherein:
the first BWP is used for a first type of traffic;
the second BWP is used for a second type of traffic; and
the first and second types of traffic have different quality of service (QoS) requirements.
4. The method of claim 3 , wherein:
one of the first type of traffic or the second type of traffic comprises ultra-reliability low latency communication (URLLC) traffic; and
the other one of the first type of traffic or the second type of traffic comprises enhanced Mobile Broadband (eMBB) traffic.
5. The method of claim 3 , wherein:
the first and second BWPs are concurrently active for the first and second types of traffic.
6. The method of claim 1 , wherein the traffic comprises grant based traffic.
7. The method of claim 1 , wherein:
the UE is configured with a wideband BWP; and
the first and second BWPs are within the wideband BWP.
8. The method of claim 1 , wherein the traffic comprises grant-free or semi-persistently scheduled (SPS) based traffic.
9. The method of claim 8 , wherein:
the UE is pre-configured with resources for the grant-free or SPS based traffic that fit within the first BWP.
10. The method of claim 1 , wherein retransmission of the traffic is grant-free, semi-persistent scheduling (SPS) based, or grant-based.
11. The method of claim 1 , further comprising receiving signaling for an allocation of resources to the UE for the traffic independent of the BWP switch.
12. The method of claim 1 , further comprising receiving signaling for an allocation of resources to the UE for each of the first and second BWPs.
13. The method of claim 12 , wherein one of the first or second BWPs comprises a subset of the other BWP.
14. The method of claim 12 , wherein resource allocation of the first BWP is with respect to a reference location within the second BWP.
15. A method for wireless communications by a network entity, comprising:
determining traffic for transmission to or from a user equipment (UE) is of a first type; and
signaling the UE for a bandwidth part (BWP) switch for transmission of the traffic, from a first BWP to a second BWP, wherein the BWP switch is to be applied within a same slot transmission time interval (TTI) during which the UE is signaled by updating a BWP filtering or fast Fourier transform (FFT) adjustment at a baseband level, and wherein the updating is performed at a mini-slot level such that the BWP switch takes place before an end of the same slot TTI.
16. The method of claim 15 , wherein the BWP switch is to be applied at a symbol level.
17. The method of claim 15 , wherein:
the first BWP is used for the first type of traffic;
the second BWP is used for a second type of traffic; and
the first and second types of traffic have different quality of service (QoS) requirements.
18. The method of claim 17 , wherein:
one of the first type of traffic or the second type of traffic comprises ultra-reliability low latency communication (URLLC) traffic; and
the other one of the first type of traffic or the second type of traffic comprises enhanced Mobile Broadband (eMBB) traffic.
19. The method of claim 17 , wherein:
the first and second BWPs are concurrently active for the first and second types of traffic.
20. The method of claim 15 , wherein the traffic comprises grant based traffic.
21. The method of claim 15 , wherein:
the UE is configured with a wideband BWP; and
the first and second BWPs are within the wideband BWP.
22. The method of claim 15 , wherein the traffic comprises grant-free or semi persistently scheduled (SPS) traffic.
23. The method of claim 22 , wherein:
the UE is pre-configured with resources for the grant-free or SPS based traffic that fit within the first BWP.
24. The method of claim 15 , wherein retransmission of the traffic is grant based, semi-persistent scheduling (SPS) based, or grant-free.
25. The method of claim 15 , further comprising allocating resources to the UE for the traffic independent of the BWP switch.
26. The method of claim 15 , further comprising allocating resources to the UE for each of the first and second BWPs.
27. The method of claim 26 , wherein one of the first or second BWPs comprises a subset of the other BWP.
28. The method of claim 26 , wherein resource allocation of the first BWP is with respect to a reference location within the second BWP.
29. An apparatus for wireless communications by a user equipment (UE), comprising:
means for receiving signaling for a bandwidth part (BWP) switch, from a first BWP to a second BWP, to process traffic for transmission to or from the UE; and
means for applying the BWP switch within a same slot transmission time interval (TTI) in which the signaling is received to process the traffic, wherein applying the BWP switch comprises at least one of: updating a BWP filtering or fast Fourier transform (FFT) adjustment at a baseband level, wherein the updating is performed at a mini-slot level such that the BWP switch takes place before an end of the same slot TTI.
30. An apparatus for wireless communications by a network entity, comprising:
means for determining traffic for transmission to or from a user equipment (UE) is of a first type; and
means for signaling the UE for a bandwidth part (BWP) switch for transmission of the traffic, from a first BWP to a second BWP, wherein the BWP switch is to be applied within a same slot transmission time interval (TTI) in which the UE is signaled by updating a BWP filtering or fast Fourier transform (FFT) adjustment at a baseband level, and wherein the updating is performed at a mini-slot level such that the BWP switch takes place before an end of the same slot TTI.
31. The method of claim 1 , wherein the BWP filtering comprises power analog-to-digital filtering and wherein the first BWP and the second BWP are associated with a common component carrier for fast switching.