Ultra-reliable low-latency communication indication channelization designs
In certain scenarios, resource preemption may occur. A user equipment (UE) is configured to monitor for a preemption indication based on a specific downlink configuration. This configuration provides information about whether preemption is identified within a data space in terms of resource blocks. The UE receives data transmissions from a base station at different times and a preemption indication in a group common physical downlink control channel. Based on this preemption indication and the downlink configuration, the UE determines if a portion of the shared downlink resources occupied by the initial data is preempted from use. If the resources are not preempted, the UE proceeds to decode the initial data.
1. A method of wireless communication performable at a user equipment (UE), the method comprising:
monitoring for a preemption indication based on a downlink configuration, the downlink configuration indicating how granular the preemption indication identifies preemption in a data space in terms of resources that are configurable at different granularities, each of the different granularities corresponding to a different time resource size or a different frequency resource size;
receiving, from a base station at a first time on shared downlink resources, a first data transmission comprising first data associated with a first type of wireless communication;
receiving, from the base station at a second time subsequent to the first time, the preemption indication in a group common physical downlink control channel (PDCCH);
determining, based on the preemption indication and the downlink configuration, whether at least a portion of the shared downlink resources occupied by the first data is preempted from use by the UE; and
decoding the first data when the portion of the shared downlink resources is not preempted from use by the UE.
2. The method of claim 1 , further comprising refraining from decoding at least a portion of the first data that occupies resources corresponding to the portion of the shared downlink resources when the portion of the shared downlink resources is preempted from use by the UE.
3. The method of claim 1 , wherein the group common PDCCH includes downlink control information (DCI), wherein the receiving the preemption indication comprises receiving the preemption indication in at least a portion of the DCI.
4. The method of claim 1 , wherein the preemption indication occupies one or more symbols in a mini-slot or one or more symbols at every predetermined number of mini-slots.
5. The method of claim 1 , wherein the preemption indication is included in the group common PDCCH across a full bandwidth or across one or more sub-bands of a bandwidth.
6. The method of claim 1 , wherein the downlink configuration indicates a periodicity of the preemption indication.
7. The method of claim 1 , further comprising receiving, from the base station, the downlink configuration, dynamically, via downlink control information (DCI) signaling, or semi-statically, via radio resource control (RRC) signaling.
8. The method of claim 1 , wherein the preemption is based at least in part on a second data transmission to another UE of second data associated with a second type of wireless communication that is different from the first type of wireless communication, the second data transmission puncturing the portion of the shared downlink resources occupied by the first data within the first data transmission.
9. The method of claim 8 , wherein the shared downlink resources includes a first portion that is preempted by the second data and a second portion that is not preempted by the second data, further comprising:
refraining from decoding a first portion of the first data that occupies resources corresponding to the first portion of the shared downlink resources that is preempted; and
decoding a second portion of the first data that occupies resources corresponding to the second portion of the shared downlink resources that is not preempted.
10. The method of claim 8 , wherein the receiving the first data transmission comprises receiving, from the base station, a physical downlink shared channel (PDSCH) that includes the first data transmission in at least a portion of the PDSCH, wherein the first data and the second data coexist within the at least the portion of the PDSCH, and wherein the data space corresponds to the PDSCH.
11. The method of claim 8 , wherein the second data occupies resources that puncture one or more time resources or one or more frequency resources occupied by the first data within the shared downlink resources at a preconfigured granularity according to the downlink configuration.
12. The method of claim 1 , wherein the downlink configuration indicates that the preemption indication is separate from the first data transmission within a physical downlink shared channel (PDSCH).
13. An apparatus for wireless communication, comprising:
one or more memories;
a transceiver; and
one or more processors coupled to the one or more memories and the transceiver, the one or more processors, individually or in combination, being configured to cause the apparatus to:
monitor for a preemption indication based on a downlink configuration, the downlink configuration indicating how granular the preemption indication identifies preemption in a data space in terms of resources that are configurable at different granularities, each of the different granularities corresponding to a different time resource size or a different frequency resource size;
receive, from a base station at a first time on shared downlink resources, via the transceiver, a first data transmission comprising first data associated with a first type of wireless communication;
receive, from the base station at a second time subsequent to the first time, via the transceiver, the preemption indication in a group common physical downlink control channel (PDCCH);
determine, based on the preemption indication and the downlink configuration, whether at least a portion of the shared downlink resources occupied by the first data is preempted from use by the apparatus; and
decode the first data when the portion of the shared downlink resources is not preempted from use by the apparatus.
14. The apparatus of claim 13 , wherein the group common PDCCH includes downlink control information (DCI), and the preemption indication is received in at least a portion of the DCI.
15. The apparatus of claim 13 , wherein the downlink configuration indicates a periodicity of the preemption indication.
16. The apparatus of claim 13 , wherein the one or more processors, individually or in combination, are further configured to cause the apparatus to:
receive, from the base station, the downlink configuration, dynamically, via downlink control information (DCI) signaling, or semi-statically, via radio resource control (RRC) signaling.
17. The apparatus of claim 13 , wherein the preemption is based at least in part on a second data transmission to a user equipment (UE) of second data associated with a second type of wireless communication that is different from the first type of wireless communication, the second data transmission puncturing the portion of the shared downlink resources occupied by the first data within the first data transmission.
18. An apparatus for wireless communication, comprising:
means for monitoring for a preemption indication based on a downlink configuration, the downlink configuration indicating how granular the preemption indication identifies preemption in a data space in terms of resources that are configurable at different granularities, each of the different granularities corresponding to a different time resource size or a different frequency resource size;
means for receiving, from a base station at a first time on shared downlink resources, a first data transmission comprising first data associated with a first type of wireless communication, the means for receiving further configured to receive, from the base station at a second time subsequent to the first time, the preemption indication in a group common physical downlink control channel (PDCCH);
means for determining, based on the preemption indication and the downlink configuration, whether at least a portion of the shared downlink resources occupied by the first data is preempted from use by the apparatus; and
means for decoding the first data when the portion of the shared downlink resources is not preempted from use by the apparatus.