Default quasi-colocation for single downlink control information-based multiple transmission reception points
Methods, systems, and devices for wireless communications are described. A communication device, which may be otherwise known as user equipment (UE) may receive a downlink control information (DCI) on a physical downlink control channel (PDCCH). The DCI may include one or more of an indication of a set of transmission configuration indicator (TCI) states related to a physical downlink shared channel (PDSCH), one or more receive beams associated with the set of TCI states, or a physical downlink shared channel (PDSCH) scheme. The UE may decode the DCI and may determine a temporal period associated with the indication of the set of TCI states. The UE may receive, based on the temporal period, the PDSCH according to one or more of the set of TCI states, the one or more receive beams associated with the set of TCI states, the PDSCH scheme, or one or more default receive beams.
1. An apparatus for wireless communication, comprising:
one or more memories storing processor-executable code; and
one or more processors coupled with the one or more memories, the one or more processors individually or collectively configured to execute the code to cause the apparatus to:
receive a downlink control information indicating a physical downlink shared channel multiplexing scheme and comprising one or more of an indication of a plurality of transmission configuration indicator states related to a physical downlink shared channel from a plurality of transmission reception points or an indication of one or more receive beams associated with the plurality of transmission configuration indicator states, wherein each of the plurality of transmission configuration indicator states is associated with a different transmission reception point of a plurality of transmission reception points;
decode the downlink control information; and
receive the physical downlink shared channel according to the physical downlink shared channel multiplexing scheme and from the plurality of transmission reception points and based at least in part on a difference between respective durations of a temporal period associated with the plurality of transmission configuration indicator states and a temporal offset period associated with the physical downlink shared channel from the plurality of transmission reception points,
wherein the physical downlink shared channel is received according to one or more of the plurality of transmission configuration indicator states, the one or more receive beams associated with the plurality of transmission configuration indicator states or one or more default receive beams.
2. The apparatus of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
select one or more of the plurality of transmission configuration indicator states, the one or more receive beams associated with the plurality of transmission configuration indicator states, or the one or more default receive beams, based at least in part on a capability relating to the one or more receive beams,
wherein receiving the physical downlink shared channel is based at least in part on the selecting.
3. The apparatus of claim 2 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
transmit a message comprising indication of the capability, wherein the message further comprises an indication of the temporal period.
4. The apparatus of claim 3 , wherein, to receive the downlink control information, the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
receive the downlink control information including a transmission configuration indicator field, wherein the transmission configuration indicator field indicates one or more transmission configuration indicator states of the plurality of transmission configuration indicator states.
5. The apparatus of claim 4 , wherein, to receive the physical downlink shared channel, the one or more processors are individually or collectively operable to execute the code to cause the apparatus to:
receive, based at least in part on the temporal offset period being greater than or equal to the temporal period, the physical downlink shared channel according to the one or more transmission configuration indicator states of the plurality of transmission configuration indicator states.
6. The apparatus of claim 1 , wherein the temporal offset period comprises a duration from an ending symbol of a physical downlink control channel carrying the downlink control information to a beginning symbol of the physical downlink shared channel, wherein the physical downlink control channel schedules the physical downlink shared channel.
7. The apparatus of claim 1 , wherein one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
receive, based at least in part on the temporal offset period being lesser than the temporal period, a first data sample set in accordance with the one or more default receive beams and the physical downlink shared channel multiplexing scheme; and
receive, based at least in part on the temporal offset period being lesser than the temporal period, a second data sample set in accordance with the one or more default receive beams and the physical downlink shared channel multiplexing scheme.
8. The apparatus of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
store one or more of the first data sample set or the second data sample set based at least in part on that the temporal offset period being lesser than the temporal period, wherein the stored first data sample set or the stored second data sample set correspond to a first antenna panel or a second antenna panel.
9. The apparatus of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
process one or more of the first data sample set or the second data sample set based at least in part on the physical downlink shared channel multiplexing scheme, wherein the physical downlink shared channel multiplexing scheme comprises a space division multiplexing scheme.
10. The apparatus of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
process one or more of the first data sample set or the second data sample set based at least in part on the plurality of transmission configuration indicator states.
11. The apparatus of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
process one or more of the first data sample set or the second data sample set based at least in part on the physical downlink shared channel multiplexing scheme, wherein the physical downlink shared channel multiplexing scheme comprises a frequency division multiplexing scheme, wherein, to process one or more of the first data sample set or the second data sample set, the one or more processors are individually or collectively operable to execute the code to cause the apparatus to:
process the first data sample set in a first set of resource blocks corresponding to a first transmission configuration indicator state of the plurality of transmission configuration indicator states; and
process the second data sample set in a second set of resource blocks corresponding to a second transmission configuration indicator state of the plurality of transmission configuration indicator states.
12. The apparatus of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
process one or more of the first data sample set or the second data sample set based at least in part on the physical downlink shared channel multiplexing scheme, wherein the physical downlink shared channel multiplexing scheme comprises a time division multiplexing scheme, wherein, to process one or more of the first data sample set or the second data sample set, the one or more processors are individually or collectively operable to execute the code to cause the apparatus to:
process the first data sample set in a first plurality of transmission time intervals corresponding to a first transmission configuration indicator state of the plurality of transmission configuration indicator states; and
process the second data sample set in a second set of set of transmission time intervals corresponding to a second transmission configuration indicator state of the plurality of transmission configuration indicator states.
13. The apparatus of claim 1 , wherein the temporal period relates to one or more of a quantity of symbols to receive the downlink control information and apply spatial quasi-colocation information for the physical downlink shared channel.
14. The apparatus of claim 1 , wherein the one or more default receive beams are based at least in part on a set of preconfigured receive beams.
15. The apparatus of claim 1 , wherein the physical downlink shared channel multiplexing scheme comprises a single transmission configuration indicator state scheme, a time division multiplexing scheme, a frequency division multiplexing scheme, a space division multiplexing scheme, or a code division multiplexing scheme.
16. The apparatus of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the apparatus to:
receive the physical downlink shared channel over a duration, wherein the duration comprises a transmission occasion, a transmission time interval, and the transmission time interval comprising one or more orthogonal frequency-division multiplexing symbols, one or more mini-slots, one or more slots, or a combination thereof.
17. A method for wireless communication, comprising:
receiving a downlink control information on a physical downlink control channel, the downlink control information indicating a physical downlink shared channel multiplexing scheme and comprising one or more of an indication of a plurality of transmission configuration indicator states related to a physical downlink shared channel from a plurality of transmission reception points or an indication of one or more receive beams associated with the plurality of transmission configuration indicator states, wherein each of the plurality of transmission configuration indicator states is associated with a different transmission reception point of a plurality of transmission reception points;
decoding the downlink control information;
determining a temporal period associated with the indication of the plurality of transmission configuration indicator states and a temporal offset period associated with the physical downlink shared channel from the plurality of transmission reception points; and
receiving the physical downlink shared channel according to the physical downlink shared channel multiplexing scheme and from the plurality of transmission reception points and based at least in part on a difference between respective durations of the temporal period and the temporal offset period,
wherein the physical downlink shared channel is received according to one or more of the plurality of transmission configuration indicator states, the one or more receive beams associated with the plurality of transmission configuration indicator states, or one or more default receive beams.
18. The method of claim 17 , further comprising:
selecting one or more of the plurality of transmission configuration indicator states, the one or more receive beams associated with the plurality of transmission configuration indicator states, or the one or more default receive beams, based at least in part on a capability relating to the one or more receive beams,
wherein receiving the physical downlink shared channel is based at least in part on the selecting.
19. The method of claim 18 , further comprising:
transmitting a message comprising indication of the capability, wherein the message further comprises an indication of the temporal period.
20. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to:
receive a downlink control information on a physical downlink control channel, the downlink control information indicating a physical downlink shared channel multiplexing scheme and comprising one or more of an indication of a plurality of transmission configuration indicator states related to a physical downlink shared channel from a plurality of transmission reception points or an indication of one or more receive beams associated with the plurality of transmission configuration indicator states, wherein each of the plurality of transmission configuration indicator states is associated with a different transmission reception point of a plurality of transmission reception points;
decode the downlink control information;
determine a temporal period associated with the indication of the plurality of transmission configuration indicator states and a temporal offset period associated with the physical downlink shared channel from the plurality of transmission reception points; and
receive the physical downlink shared channel according to the physical downlink shared channel multiplexing scheme and from the plurality of transmission reception points and based at least in part on a difference between respective durations of the temporal period and the temporal offset period,
wherein the physical downlink shared channel is received according to one or more of the plurality of transmission configuration indicator states, the one or more receive beams associated with the plurality of transmission configuration indicator states, or one or more default receive beams.