Nesting configured grant—small data transfer occasions
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a configuration message that indicates a radio resource allocation and a transmission scheme for one or more first configured grant-small data transfer (CG-SDT) occasions and one or more second CG-SDT occasions. The one or more second CG-SDT occasions are at least partially nested, in time, frequency, or a combination thereof, within the one or more first CG-SDT occasions. The UE may therefore transmit, to the base station, an uplink communication within the one or more first CG-SDT occasions or the one or more second CG-SDT occasions, using the radio resource allocation and the transmission scheme. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network entity, a configuration message that indicates a radio resource allocation and a transmission scheme for one or more first configured grant-small data transfer (CG-SDT) occasions associated with a first set of time resources and a first set of frequency resources and one or more second CG-SDT occasions, wherein the one or more second CG-SDT occasions are associated with at least one of: a second set of time resources that include at least a subset of the first set of time resources, or a second set of frequency resources that include at least a subset of the first set of frequency resources; and
transmitting, to the network entity, an uplink communication within the one or more first CG-SDT occasions or the one or more second CG-SDT occasions, using the radio resource allocation and the transmission scheme.
2. The method of claim 1 , wherein the one or more first CG-SDT occasions and the one or more second CG-SDT occasions are associated with a same CG-SDT group including the UE.
3. The method of claim 1 , wherein the one or more second CG-SDT occasions are associated with a resource size that is different than a resource size associated with the one or more first CG-SDT occasions.
4. The method of claim 1 , wherein the configuration message indicates at least one of:
frequency hopping for the one or more first CG-SDT occasions or the one or more second CG-SDT occasions, or
one or more mappings or repetition schemes in a time domain for a data channel used to transmit the uplink communication.
5. The method of claim 1 , wherein the one or more second CG-SDT occasions are associated with a modulation and coding scheme (MCS) that is different than an MCS associated with the one or more first CG-SDT occasions.
6. The method of claim 1 , further comprising:
receiving, from the network entity and in a search space indicated by the configuration message, a response based at least in part on the uplink communication, wherein the uplink communication is associated with an initial transmission or a retransmission.
7. The method of claim 1 , wherein the uplink communication includes an identifier based at least in part on an index associated with the one or more first CG-SDT occasions or the one or more second CG-SDT occasions that are selected by the UE for a demodulation reference signal and physical uplink shared channel transmission.
8. The method of claim 1 , wherein the configuration message further indicates at least one of:
one or more search space configurations for a response message,
one or more uplink control information multiplexing schemes,
one or more timing advance validation schemes,
one or more power control schemes for initial transmission, or
one or more power control schemes for retransmission.
9. The method of claim 1 , further comprising:
validating uplink timing alignment, based at least in part on one or more criteria provided by the network entity, before transmitting the uplink communication,
wherein the uplink communication is transmitted based at least in part on validating the uplink timing alignment.
10. A method of wireless communication performed by a network entity, comprising:
transmitting, to a user equipment (UE), a configuration message that indicates a radio resource allocation and a transmission scheme for one or more first configured grant-small data transfer (CG-SDT) occasions associated with a first set of time resources and a first set of frequency resources and one or more second CG-SDT occasions, wherein the one or more second CG-SDT occasions are associated with at least one of: a second set of time resources that include at least a subset of the first set of time resources, or a second set of frequency resources that include at least a subset of the first set of frequency resources; and
receiving, from the UE, an uplink communication within the one or more first CG-SDT occasions or the one or more second CG-SDT occasions, using the radio resource allocation and the transmission scheme.
11. The method of claim 10 , wherein the one or more first CG-SDT occasions and the one or more second CG-SDT occasions are associated with a same CG-SDT group including the UE.
12. The method of claim 10 , wherein the one or more second CG-SDT occasions are associated with a modulation and coding scheme (MCS) that is different than an MCS associated with the one or more first CG-SDT occasions.
13. The method of claim 10 , wherein the configuration message indicates frequency hopping for the one or more first CG-SDT occasions or the one or more second CG-SDT occasions.
14. The method of claim 10 , wherein the configuration message indicates one or more mappings or repetition schemes in a time domain for data channel used to receive the uplink communication.
15. The method of claim 10 , further comprising:
transmitting, to the UE and in a search space indicated by the configuration message, a response based at least in part on the uplink communication, wherein the uplink communication is associated with an initial transmission or a retransmission.
16. The method of claim 10 , wherein the uplink communication includes an identifier based at least in part on an index associated with the one or more first CG-SDT occasions or the one or more second CG-SDT occasions that were selected by the UE for a demodulation reference signal and physical uplink shared channel transmission.
17. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network entity, information indicating a radio resource allocation, a periodicity, a transmission scheme, and a resource size for a configured grant-small data transfer (CG-SDT) group including the UE; and
receiving, from the network entity, an index that indicates one or more first CG-SDT occasions, wherein the index is based at least in part on one or more frequency resources included in the one or more first CG-SDT occasions, one or more time resources included in the one or more first CG-SDT occasions, and one or more demodulation reference signal resources associated with the one or more first CG-SDT occasions.
18. The method of claim 17 , wherein the index is sequential based at least in part on an increasing order of the one or more frequency resources, an increasing order of the one or more time resources, and an increasing order of the one or more demodulation reference signal resources.
19. The method of claim 17 , wherein the information and the index are received in a broadcast message.
20. The method of claim 17 , wherein the information further indicates a modulation and coding scheme, a frequency hopping, and a mapping or repetition scheme in a time domain for the CG-SDT group.