Unified transmission configuration indication for nondedicated channels
Aspects presented herein may enable a UE to determine QCL information and/or a spatial filter for non-dedicated channel and/or signal based on a unified TCI indication from a base station. In one aspect, a UE receives a TCI state indication in association with a communication of at least one non-dedicated DL channel or non-dedicated DL signal. The UE determines QCL information for the communication of the at least one non-dedicated DL channel or the non-dedicated DL signal based on one or more source reference signals for the received TCI state indication. The UE receives the at least one non-dedicated DL channel or the non-dedicated DL signal based on the received TCI state indication and the determined QCL information.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
at least one memory; and
at least one processor coupled to the at least one memory and configured to:
receive a transmission configuration indication (TCI) state indication in association with a communication of at least one non-dedicated downlink (DL) channel or non-dedicated DL signal, wherein the at least one of the non-dedicated DL channel or the non-dedicated DL signal comprises a broadcast channel or broadcast signal that includes at least one of a broadcast physical downlink control channel (PDCCH) associated with control resource set (CORESET) zero, a PDCCH associated with CORESET including search space (SS) zero, a PDCCH associated with CORESETs including common SS (CSS), a physical downlink shared channel (PDSCH) associated with CORESET zero, a PDSCH associated with CORESET including SS zero, or a PDSCH associated with CORESETs including CSS;
determine quasi co-location (QCL) information for the communication of the at least one non-dedicated DL channel or the non-dedicated DL signal based on one or more source reference signals for the received TCI state indication; and
receive the at least one non-dedicated DL channel or the non-dedicated DL signal based on the received TCI state indication and the determined QCL information.
2 . The apparatus of claim 1 , wherein the TCI state indication is a unified TCI state indication.
3 . The apparatus of claim 2 , wherein the unified TCI state indication includes at least one of a joint DL or uplink (UL) common TCI state indicating a common beam for at least one DL channel or DL reference signal (RS) and at least one UL channel or UL RS, or a separate DL common TCI state indicating a common beam for at least two DL channels or DL RSs.
4 . The apparatus of claim 1 , wherein the broadcast channel or broadcast signal comprises a PDSCH with a common configuration in a serving base station.
5 . The apparatus of claim 1 , wherein the TCI state indication is received via one of radio resource control (RRC) signaling or a medium access control (MAC) control element (CE) (MAC-CE).
6 . The apparatus of claim 5 , wherein the received RRC signaling or the MAC-CE is associated with one TCI state indication, the one TCI state indication being the received TCI state indication.
7 . The apparatus of claim 5 , wherein the received RRC signaling or the MAC-CE is associated with one channel type, the at least one non-dedicated channel or the non-dedicated signal being the one channel type.
8 . The apparatus of claim 5 , wherein the received RRC signaling or the MAC-CE is associated with one TCI state indication and one channel type, the one TCI state indication being the received TCI state indication, the at least one non-dedicated channel or the non-dedicated signal being the one channel type.
9 . The apparatus of claim 1 , wherein the TCI state indication indicates non-serving cell information.
10 . The apparatus of claim 1 , wherein the TCI state indication does not indicate non-serving cell information.
11 . A method of wireless communication at a user equipment (UE), comprising:
receiving a transmission configuration indication (TCI) state indication in association with a communication of at least one non-dedicated downlink (DL) channel or non-dedicated DL signal, wherein the at least one of the non-dedicated DL channel or the non-dedicated DL signal comprises a broadcast channel or broadcast signal that includes at least one of a broadcast physical downlink control channel (PDCCH) associated with control resource set (CORESET) zero, a PDCCH associated with CORESET including search space (SS) zero, a PDCCH associated with CORESETs including common SS (CSS), a physical downlink shared channel (PDSCH) associated with CORESET zero, a PDSCH associated with CORESET including SS zero, or a PDSCH associated with CORESETs including CSS;
determining quasi co-location (QCL) information for the communication of the at least one non-dedicated DL channel or the non-dedicated DL signal based on one or more source reference signals for the received TCI state indication; and
receiving the at least one non-dedicated DL channel or the non-dedicated DL signal based on the received TCI state indication and the determined QCL information.
12 . An apparatus for wireless communication at a base station, comprising:
at least one memory; and
at least one processor coupled to the at least one memory and configured to:
transmit a transmission configuration indication (TCI) state indication in association with a communication of at least one non-dedicated downlink (DL) channel or non-dedicated DL signal, wherein the at least one of the non-dedicated DL channel or the non-dedicated DL signal comprises a broadcast channel or broadcast signal that includes at least one of a broadcast physical downlink control channel (PDCCH) associated with control resource set (CORESET) zero, a PDCCH associated with CORESET including search space (SS) zero, a PDCCH associated with CORESETs including common SS (CSS), a physical downlink shared channel (PDSCH) associated with CORESET zero, a PDSCH associated with CORESET including SS zero, or a PDSCH associated with CORESETs including CSS; and
transmit the at least one non-dedicated DL channel or the non-dedicated DL signal based on the transmitted TCI state indication and quasi co-location (QCL) information associated with one or more source reference signals of the transmitted TCI state indication.
13 . The apparatus of claim 12 , wherein the TCI state indication is a unified TCI state indication.
14 . The apparatus of claim 13 , wherein the unified TCI state indication includes at least one of a joint DL or uplink (UL) common TCI state indicating a common beam for at least one DL channel or DL reference signal (RS) and at least one UL channel or UL RS, or a separate DL common TCI state indicating a common beam for at least two DL channels or DL RSs.
15 . A method of wireless communication at a user equipment comprising:
receiving a transmission configuration indication (TCI) state in association with a communication of at least one non-dedicated uplink (UL) channel or non-dedicated UL signal, wherein the at least one of the non-dedicated UL channel or the non-dedicated UL signal comprises a broadcast channel or broadcast signal that includes at least one of a physical uplink control channel (PUCCH) associated with control resource set (CORESET) zero, a PUCCH associated with CORESET including search space (SS) zero, or a PUCCH associated with CORESETs including common SS (CSS);
determining a spatial filter for the communication of the at least one non-dedicated UL channel or the non-dedicated UL signal based on one or more source reference signals for the received TCI state indication; and
transmitting the at least one non-dedicated UL channel or the non-dedicated UL signal based on the received TCI state indication and the determined spatial filter.
16 . An apparatus for wireless communication at a user equipment (UE), comprising:
at least one memory; and
at least one processor coupled to the at least one memory and configured to:
receive a transmission configuration indication (TCI) state in association with a communication of at least one non-dedicated uplink (UL) channel or non-dedicated UL signal, wherein the at least one of the non-dedicated UL channel or the non-dedicated UL signal comprises a broadcast channel or broadcast signal that includes at least one of a physical uplink control channel (PUCCH) associated with control resource set (CORESET) zero, a PUCCH associated with CORESET including search space (SS) zero, or a PUCCH associated with CORESETs including common SS (CSS);
determine a spatial filter for the communication of the at least one non-dedicated UL channel or the non-dedicated UL signal based on one or more source reference signals for the received TCI state indication; and
transmit the at least one non-dedicated UL channel or the non-dedicated UL signal based on the received TCI state indication and the determined spatial filter.
17 . The apparatus of claim 16 , wherein the TCI state indication is a unified TCI state indication.
18 . The apparatus of claim 17 , wherein the unified TCI state indication includes at least one of a joint downlink (DL) or UL common TCI state indicating a common beam for at least one DL channel or DL reference signal (RS) and at least one UL channel or UL RS, or a separate UL common TCI state indicating a common beam for at least two UL channels or UL RSs.
19 . The apparatus of claim 16 , wherein the broadcast channel or broadcast signal comprises at least one of a physical uplink shared channel (PUSCH) with a common configuration in a serving base station or a PUCCH with a common configuration in a serving base station.
20 . The apparatus of claim 16 , wherein the broadcast channel or broadcast signal comprises a physical random access channel preamble.
21 . The apparatus of claim 16 , wherein the TCI state indication is received via one of radio resource control (RRC) signaling or a medium access control (MAC) control element (CE) (MAC-CE).
22 . The apparatus of claim 21 , wherein the received RRC signaling or the MAC-CE is associated with one TCI state indication, the one TCI state indication being the received TCI state indication.
23 . The apparatus of claim 21 , wherein the received RRC signaling or the MAC-CE is associated with one channel type, the at least one non-dedicated channel or the non-dedicated signal being the one channel type.
24 . The apparatus of claim 21 , wherein the received RRC signaling or the MAC-CE is associated with one TCI state indication and one channel type, the one TCI state indication being the received TCI state indication, the at least one non-dedicated channel or the non-dedicated signal being the one channel type.
25 . The apparatus of claim 16 , wherein the TCI state indication indicates non-serving cell information.
26 . The apparatus of claim 16 , wherein the TCI state indication does not indicate non-serving cell information.