Quasi co-location of antenna ports used to transmit paging message and synchronization signals
Methods, systems, and devices for wireless communication are described. A base station may use quasi co-located antenna ports for transmission of synchronization signal(s)/reference signal(s) and paging signals. For example, the base station may use a first antenna port configuration for transmission of the synchronization/reference signal(s) and a second antenna port configuration for transmission of the paging signal (e.g., paging indicator, paging message, etc.). The base station may transmit an indication of the quasi co-located antenna ports. A user equipment (UE) may receive the synchronization signal and, based on the antenna ports being quasi co-located, receive the paging signal. In some examples, the UE may determine which receive beam to use to receive the paging signal based on the antenna ports being quasi co-located. In some aspects, the UE may use a reference signal transmitted on antenna ports that are quasi co-located with the paging signal antenna ports.
1. A method for wireless communication at a user equipment (UE), comprising:
receiving a synchronization signal block (SSB) associated with a first antenna port configuration; and
receiving a paging signal associated with a second antenna port configuration, wherein the SSB and a demodulation reference signal (DMRS) of the paging signal are quasi co-located with respect to receive beamforming at the UE, and wherein the first antenna port configuration comprises antenna ports that are quasi co-located with respect to antenna ports of the second antenna port configuration.
2. The method of claim 1 , wherein:
the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.
3. The method of claim 2 , wherein:
the paging indication comprises a downlink control information.
4. The method of claim 2 , wherein:
the paging message is received in a physical downlink shared channel (PDSCH), and
the paging schedule is received in a physical downlink control channel (PDCCH).
5. The method of claim 1 , wherein:
the SSB and the paging signal are time-division multiplexed.
6. The method of claim 1 , further comprising:
receiving an indication of quasi co-located antenna ports of the first antenna port configuration and the second antenna port configuration.
7. The method of claim 6 , wherein:
the indication is received in one or more of a master information block (MIB), a minimum system information block (MSIB), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a radio resource control (RRC) message exchange.
8. The method of claim 6 , wherein:
the indication is received using a different carrier than the SSB and the paging signal.
9. The method of claim 1 , wherein:
the SSB comprises one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), a tertiary synchronization signal (TSS), a mobility reference signal, a beam reference signal (BRS), a tracking reference signal (TRS), a channel state information reference signal (CSI-RS), or a combination thereof.
10. The method of claim 1 , further comprising:
receiving the SSB in a first beamformed transmission; and
receiving the paging signal in a second beamformed transmission.
11. An apparatus for wireless communication, comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a synchronization signal block (SSB) associated with a first antenna port configuration; and
receive a paging signal associated with a second antenna port configuration, wherein the SSB and a demodulation reference signal (DMRS) of the paging signal are quasi co-located with respect to receive beamforming at a user equipment (UE) associated with the apparatus, and wherein the first antenna port configuration comprises antenna ports that are quasi co-located with respect to antenna ports of the second antenna port configuration.
12. The apparatus of claim 11 , wherein:
the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.
13. The apparatus of claim 12 , wherein:
the paging indication comprises a downlink control information.
14. The apparatus of claim 12 , wherein:
the paging message is received in a physical downlink shared channel (PDSCH), and
the paging schedule is received in a physical downlink control channel (PDCCH).
15. The apparatus of claim 11 , wherein:
the SSB and the paging signal are time-division multiplexed.
16. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive an indication of quasi co-located antenna ports of the first antenna port configuration and the second antenna port configuration.
17. The apparatus of claim 16 , wherein:
the indication is received in one or more of a master information block (MIB), a minimum system information block (MSIB), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a radio resource control (RRC) message exchange, and
the indication is received using a different carrier than the SSB and the paging signal.
18. The apparatus of claim 11 , wherein:
the SSB comprises one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), a tertiary synchronization signal (TSS), a mobility reference signal, a beam reference signal (BRS), a tracking reference signal (TRS), a channel state information reference signal (CSI-RS), or a combination thereof.
19. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive the SSB in a first beamformed transmission; and
receive the paging signal in a second beamformed transmission.