Timing parameter management for bandwidth part switching
Bandwidth part (BWP) switching may benefit a wireless communications system. Such BWP switching may include indication of one or more timing parameters used for time domain resource allocation. For example, the timing parameters may be indicated based on an index to a look-up table (e.g., a bit field in a control transmission). In some cases, one or more tables may be configured for a given BWP, and different tables may contain a different number of rows. The size of the bit field indexing the table may in turn depend on the number of rows. When switching from a first BWP to a second BWP, the size of the bit field may be based on the table of the first BWP, but the bit field may index the table of the second BWP. Techniques supporting improved timing parameter management during BWP switching are discussed herein.
1. A user equipment (UE) for wireless communication, comprising:
one or more processors; and
one or more memories coupled with the one or more processors and that store processor-executable code that, when executed by the one or more processors, is configured to cause the UE to:
identify a plurality of sets of timing parameters, each set defining one or more potential values for a timing parameter associated with a timing between receipt, from a network device, of downlink control information (DCI) and a subsequent communication with the network device according to the DCI, the plurality of sets of timing parameters comprising at least a first set of timing parameters associated with a first bandwidth part (BWP) and a second set of timing parameters associated with a second BWP;
receive, over the first BWP, a DCI transmission that activates the second BWP, the DCI transmission comprising a resource allocation bit field indexing at least a subset of the second set of timing parameters, wherein a size of the resource allocation bit field is based at least in part on a configuration of the first BWP;
identify a value for the timing parameter based at least in part on the second set of timing parameters and the size of the resource allocation bit field; and
communicate with the network device over the second BWP in accordance with the value for the timing parameter, wherein when the first set of timing parameters comprises more timing parameters than the second set of timing parameters, the processor-executable code is further configured to cause the UE to:
identify a subset of bits in the resource allocation bit field, the subset of bits indexing a timing parameter of the second set of timing parameters; and
determine the value for the timing parameter based on the indexed timing parameter of the second set of timing parameters.
2. The UE of claim 1 , wherein identifying the subset of bits in the resource allocation bit field comprises using a least significant bit of the resource allocation bit field.
3. The UE of claim 1 , wherein one or more bits of the resource allocation bit field are zero-padded.
4. The UE of claim 1 , wherein the first set of timing parameters is associated with uplink transmissions over the first BWP, the plurality of sets of timing parameters further comprising a third set of timing parameters associated with downlink transmissions over the first BWP.
5. The UE of claim 1 , wherein the first BWP has a first tone spacing and the second BWP has a second tone spacing, and wherein first potential values for the timing parameter of the first set of timing parameters are based at least in part on the first tone spacing, and second potential values for the timing parameter of the second set of timing parameters are based at least in part on the second tone spacing.
6. A user equipment (UE) for wireless communication, comprising:
one or more processors; and
one or more memories coupled with the one or more processors and that store processor-executable code that, when executed by the one or more processors, is configured to cause the UE to:
identify a plurality of sets of timing parameters, each set defining one or more potential values for a timing parameter associated with a timing between receipt, from a network device, of downlink control information (DCI) and a subsequent communication with the network device according to the DCI, the plurality of sets of timing parameters comprising at least a first set of timing parameters associated with a first bandwidth part (BWP) and a second set of timing parameters associated with a second BWP;
receive, over the first BWP, a DCI transmission that activates the second BWP, the DCI transmission comprising a resource allocation bit field indexing at least a subset of the second set of timing parameters, wherein a size of the resource allocation bit field is based at least in part on a configuration the first BWP;
identify a value for the timing parameter based at least in part on the second set of timing parameters and the size of the resource allocation bit field; and
communicate with the network device over the second BWP in accordance with the value for the timing parameter, wherein when the first set of timing parameters comprises fewer timing parameters than the second set of timing parameters, the processor-executable code is further configured to cause the UE to:
identify a subset of the timing parameters in the second set of timing parameters that are addressable by the resource allocation bit field;
identify a timing parameter in the subset of the timing parameters in the second set of timing parameters indexed by the resource allocation bit field; and
determine the value for the timing parameter based on the indexed timing parameter, wherein the value for the timing parameter is a potential value that corresponds to the indexed timing parameter.
7. The UE of claim 6 , wherein the subset of the second set of timing parameters comprises a lowest-indexed timing parameter of the second set of timing parameters, the lowest-indexed timing parameter corresponding to a value of the timing parameter for switching to the second BWP.
8. The UE of claim 6 , wherein the subset of the second set of timing parameters comprises a largest value of the one or more potential values for the timing parameter from the second set of timing parameters.
9. The UE of claim 6 , wherein the subset of the second set of timing parameters comprises at least one timing parameter corresponding to a value of the timing parameter for communicating in the second BWP.
10. The UE of claim 9 , wherein the value of the timing parameter comprises a first value for wakeup communications, a second value for data communications, or a third value for micro-sleep communications.
11. The UE of claim 6 , wherein identifying the subset of the timing parameters in the second set of timing parameters that are addressable by the resource allocation bit field comprises using lower indexed timing parameters of the second set of timing parameters, starting from a lowest indexed timing parameter and proceeding to a last addressable timing parameter of the second set of timing parameters.
12. The UE of claim 6 , wherein identifying the subset of the timing parameters in the second set of timing parameters that are addressable by the resource allocation bit field comprises using a least significant bit of the resource allocation bit field to index a timing parameter of the second set of timing parameters.
13. The UE of claim 6 , wherein the first set of timing parameters is associated with uplink transmissions over the first BWP, the plurality of sets of timing parameters further comprising a third set of timing parameters associated with downlink transmissions over the first BWP.
14. The UE of claim 6 , wherein the first BWP has a first tone spacing and the second BWP has a second tone spacing, and wherein first potential values for the timing parameter of the first set of timing parameters are based at least in part on the first tone spacing, and second potential values for the timing parameter of the second set of timing parameters are based at least in part on the second tone spacing.
15. A user equipment (UE), comprising:
one or more processors; and
one or more memories coupled with the one or more processors and that store processor-executable code that, when executed by the one or more processors, is configured to cause the UE to:
receive, from a network device, over a first bandwidth part (BWP), a downlink control information (DCI) transmission that activates a second BWP, wherein the DCI transmission comprises a resource allocation bit field that indicates a value for a timing parameter from a plurality of sets of timing parameters that define one or more potential values for the timing parameter, wherein a size of the resource allocation bit field is associated with a configuration of the first BWP, wherein the plurality of sets of timing parameters comprises a first set of timing parameters associated with the first BWP and a second set of timing parameters associated with the second BWP; and
communicate with the network device over the second BWP in accordance with the value for the timing parameter;
wherein the first set of timing parameters comprises more timing parameters than the second set of timing parameters, wherein a subset of bits of the resource allocation bit field indexes a first timing parameter of the second set of timing parameters, and wherein the resource allocation bit field indicates the timing parameter in accordance with the indexed first timing parameter of the second set of timing parameters.
16. The UE of claim 15 , wherein the first set of timing parameters is associated with uplink transmissions over the first BWP, the plurality of sets of timing parameters further comprising a third set of timing parameters associated with downlink transmissions over the first BWP.
17. A method for wireless communication, comprising:
identifying a plurality of sets of timing parameters, each set defining one or more potential values for a timing parameter associated with a timing between receipt, from a network device, of downlink control information (DCI) and a subsequent communication with the network device according to the DCI, the plurality of sets of timing parameters comprising at least a first set of timing parameters associated with a first bandwidth part (BWP) and a second set of timing parameters associated with a second BWP;
receiving, over the first BWP, a DCI transmission that activates the second BWP, the DCI transmission comprising a resource allocation bit field indexing at least a subset of the second set of timing parameters, wherein a size of the resource allocation bit field is based at least in part on a configuration of the first BWP;
identifying a value for the timing parameter based at least in part on the second set of timing parameters and the size of the resource allocation bit field; and
communicating with the network device over the second BWP in accordance with the value for the timing parameter, wherein when the first set of timing parameters comprises more timing parameters than the second set of timing parameters, identifying the value for the timing parameter comprises:
identifying a subset of bits in the resource allocation bit field, the subset of bits indexing a timing parameter of the second set of timing parameters; and
determining the value for the timing parameter based on the indexed timing parameter of the second set of timing parameters.
18. The method of claim 17 , wherein identifying the subset of bits in the resource allocation bit field comprises using a least significant bit of the resource allocation bit field.
19. The method of claim 17 , wherein the first set of timing parameters is associated with uplink transmissions over the first BWP, the plurality of sets of timing parameters further comprising a third set of timing parameters associated with downlink transmissions over the first BWP.
20. A method for wireless communication, comprising:
identifying a plurality of sets of timing parameters, each set defining one or more potential values for a timing parameter associated with a timing between receipt, from a network device, of downlink control information (DCI) and a subsequent communication with the network device according to the DCI, the plurality of sets of timing parameters comprising at least a first set of timing parameters associated with a first bandwidth part (BWP) and a second set of timing parameters associated with a second BWP;
receiving, over the first BWP, a DCI transmission that activates the second BWP, the DCI transmission comprising a resource allocation bit field indexing at least a subset of the second set of timing parameters, wherein a size of the resource allocation bit field is based at least in part on a configuration of the first BWP;
identifying a value for the timing parameter based at least in part on the second set of timing parameters and the size of the resource allocation bit field; and
communicating with the network device over the second BWP in accordance with the value for the timing parameter, wherein when the first set of timing parameters comprises fewer timing parameters than the second set of timing parameters, identifying the value for the timing parameter comprises:
identifying a subset of the timing parameters in the second set of timing parameters that are addressable by the resource allocation bit field;
identifying a timing parameter in the subset of the timing parameters in the second set of timing parameters indexed by the resource allocation bit field; and
determining the value for the timing parameter based on the indexed timing parameter, wherein the value for the timing parameter is a potential value that corresponds to the indexed timing parameter.
21. The method of claim 20 , wherein the subset of the second set of timing parameters comprises a lowest-indexed timing parameter of the second set of timing parameters, the lowest-indexed timing parameter corresponding to a value of the timing parameter for switching to the second BWP.
22. The method of claim 20 , wherein the subset of the second set of timing parameters comprises a largest value of the one or more potential values for the timing parameter from the second set of timing parameters.
23. A method of wireless communication, comprising:
receiving, from a network device, over a first bandwidth part (BWP), a downlink control information (DCI) transmission that activates a second BWP, wherein the DCI transmission comprises a resource allocation bit field that indicates a value for a timing parameter from a plurality of sets of timing parameters that define one or more potential values for the timing parameter, wherein a size of the resource allocation bit field is associated with a configuration of the first BWP, wherein the plurality of sets of timing parameters comprises a first set of timing parameters associated with the first BWP and a second set of timing parameters associated with the second BWP; and
communicating with the network device over the second BWP in accordance with the value for the timing parameter;
wherein the first set of timing parameters comprises fewer timing parameters than the second set of timing parameters, wherein a subset of timing parameters in the second set of timing parameters are addressable by the resource allocation bit field, wherein a first timing parameter in the subset of the second set of timing parameters is indexed by the resource allocation bit field, and wherein the resource allocation bit field indicates the timing parameter in accordance with the indexed first timing parameter.