Method and apparatus for downlink and uplink multi-beam operation
A method for operating a user equipment (UE) comprises receiving configuration information including multiple transmission configuration indicator (TCI) states, and receiving a beam indication indicating a TCI state from the multiple TCI states. The TCI state indicates a beam for each of N entities (E 1 , E 2 , . . . E N ), and the TCI state comprises a TCI state ID and up to N+1 components (A 0 , A 1 , A 2 , . . . , A N ), where A 0 comprises common components for all entities, and for each n∈{1, 2, . . . , N}, A n comprises specific components for entity E n , and components A 0 and A n together indicate the beam for entity E n . The method includes determining the beam for each of N entities (E 1 , E 2 , . . . E N ) indicated by the TCI state, and transmitting an uplink (UL) transmission or receiving a downlink (DL) transmission based on the beam for each of N entities (E 1 , E 2 , . . . E N ).
1. A user equipment (UE) comprising:
a transceiver configured to:
receive configuration information including multiple transmission configuration indicator (TCI) states; and
receive a beam indication indicating a TCI state from the multiple TCI states;
wherein the TCI state indicates a beam for each of N entities (E 1 , E 2 , . . . E N ), and
wherein the TCI state comprises a TCI state ID and up to N+1 components (A 0 , A 1 , A 2 , . . . , A N ), where A 0 comprises common components for all entities, and for each n∈{1, 2, . . . , N}, A n comprises specific components for entity E n , and components A 0 and A n together indicate the beam for entity E n ; and
a processor coupled to the transceiver, the processor configured to determine the beam for each of N entities (E 1 , E 2 , . . . E N ) indicated by the TCI state,
wherein the transceiver is configured to transmit an uplink (UL) transmission or receive a downlink (DL) transmission based on the beam for each of N entities (E 1 , E 2 , . . . E N ).
2. The UE of claim 1 , wherein the beam indication indicating the TCI state is via downlink control information (DCI).
3. The UE of claim 1 , wherein each component from (A 0 , A 1 , A 2 , . . . , A N ) comprises at least one reference signal from channel state information reference signal (CSI-RS), synchronization signal block (SSB), downlink demodulation reference signal (DL DMRS), sounding reference signal (SRS), or uplink demodulation reference signal (UL DMRS).
4. The UE of claim 1 , wherein:
one or more of the components (A 0 , A 1 , A 2 , . . . , A N ) is not included in the TCI state;
when A 0 is not included, then for each n∈{1, . . . , N}, the component A n indicates the beam for entity E n ; and
when A n is not included for an n∈{1, . . . , N}, the component A 0 indicates the beam for entity E n .
5. The UE of claim 1 , wherein N=2.
6. The UE of claim 5 , wherein the entity E 1 comprises at least one of DL channels, physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH), and the entity E 2 comprises at least one of UL channels, physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), or physical random access channel (PRACH).
7. The UE of claim 5 , wherein the entity E 1 comprises physical downlink control channel (PDCCH), and the entity E 2 comprises physical downlink shared channel (PDSCH).
8. A base station (BS), the BS comprising:
a processor configured to:
generate configuration information including multiple transmission configuration indicator (TCI) states; and
generate a beam indication indicating a TCI state from the multiple TCI states; and
a transceiver, operably connected to the processor, the transceiver configured to:
transmit the configuration information including the multiple TCI states; and
transmit the beam indication indicating the TCI state from the multiple TCI states;
wherein the TCI state indicates a beam for each of N entities (E 1 , E 2 , . . . E N ),
wherein the TCI state comprises a TCI state ID and up to N+1 components (A 0 , A 1 , A 2 , . . . , A N ), where A 0 comprises common components for all entities, and for each n∈{1, 2, . . . , N}, A n comprises specific components for entity E n , and components A 0 and A n together indicate the beam for entity E n , and
wherein the transceiver is configured to receive an uplink (UL) transmission or transmit a downlink (DL) transmission based on the beam for each of N entities (E 1 , E 2 , . . . E N ).
9. The BS of claim 8 , wherein the beam indication indicating the TCI state is via downlink control information (DCI).
10. The BS of claim 8 , wherein each component from (A 0 , A 1 , A 2 , . . . , A N ) comprises at least one reference signal from channel state information reference signal (CSI-RS), synchronization signal block (SSB), downlink demodulation reference signal (DL DMRS), sounding reference signal (SRS), or uplink demodulation reference signal (UL DMRS).
11. The BS of claim 8 , wherein:
one or more of the components (A 0 , A 1 , A 2 , . . . , A N ) is not included in the TCI state;
when A 0 is not included, then for each n∈{1, . . . , N}, the component A n indicates the beam for entity E n ; and
when A n is not included for an n∈{1, . . . , N}, the component A 0 indicates the beam for entity E n .
12. The BS of claim 8 , wherein N=2.
13. The BS of claim 12 , wherein the entity E 1 comprises at least one of DL channels, physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH), and the entity E 2 comprises at least one of UL channels, physical uplink control channel (PUCCH) physical uplink shared channel (PUSCH), or physical random access channel (PRACH).
14. The BS of claim 12 , wherein the entity E 1 comprises physical downlink control channel (PDCCH), and the entity E 2 comprises physical downlink shared channel (PDSCH).
15. A method for operating a user equipment (UE), the method comprising:
receiving configuration information including multiple transmission configuration indicator (TCI) states;
receiving a beam indication indicating a TCI state from the multiple TCI states;
wherein the TCI state indicates a beam for each of N entities (E 1 , E 2 , . . . E N ), and
wherein the TCI state comprises a TCI state ID and up to N+1 components (A 0 , A 1 , A 2 , . . . , A N ), where A 0 comprises common components for all entities, and for each n∈{1, 2, . . . , N}, A n comprises specific components for entity E n , and components A 0 and A n together indicate the beam for entity E n ;
determining the beam for each of N entities (E 1 , E 2 , . . . E N ) indicated by the TCI state; and
transmitting an uplink (UL) transmission or receiving a downlink (DL) transmission based on the beam for each of N entities (E 1 , E 2 , . . . E N ).
16. The method of claim 15 , wherein the beam indication indicating the TCI state is via downlink control information (DCI).
17. The method of claim 15 , wherein each component from (A 0 , A 1 , A 2 , . . . , A N ) comprises at least one reference signal from channel state information reference signal (CSI-RS), synchronization signal block (SSB), downlink demodulation reference signal (DL DMRS), sounding reference signal (SRS), or uplink demodulation reference signal (UL DMRS).
18. The method of claim 15 , wherein:
one or more of the components (A 0 , A 1 , A 2 , . . . , A N ) is not included in the TCI state;
when A 0 is not included, then for each n∈{1, . . . , N}, the component A n indicates the beam for entity E n ; and
when A n is not included for an n∈{1, . . . , N}, the component A 0 indicates the beam for entity E n .
19. The method of claim 15 , wherein N=2.
20. The method of claim 19 , wherein:
the entity E 1 comprises at least one of DL channels physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH), and the entity E 2 comprises at least one of UL channels physical uplink control channel (PUCCH) physical uplink shared channel (PUSCH), or physical random access channel (PRACH).