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, comprising:
transmitting a synchronization signal block (SSB) to a user equipment (UE) using a first antenna port configuration; and
transmitting a paging signal to the UE using 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 paging downlink control indicator (DCI).
4. The method of claim 2 , wherein:
the paging message is transmitted in a physical downlink shared channel (PDSCH), and
the paging schedule is transmitted in a physical downlink control channel (PDCCH).
5. The method of claim 1 , further comprising:
time-division multiplexing (TDM) the SSB and the paging signal.
6. The method of claim 5 , wherein:
TDM the SSB and the paging signal comprises: transmitting the SSB in the same slot as the paging signal.
7. The method of claim 5 , wherein:
TDM the SSB and the paging signal comprises: transmitting the SSB in a different slot than the paging signal.
8. The method of claim 1 , further comprising:
transmitting an indication of the quasi co-located antenna ports of the first antenna port configuration and the second antenna port configuration.
9. The method of claim 8 , wherein:
the indication is transmitted 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.
10. The method of claim 8 , wherein:
the indication is transmitted using a different carrier than the SSB and the paging signal.
11. 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.
12. The method of claim 1 , further comprising:
transmitting the SSB in a first beamformed transmission; and
transmitting the paging signal in a second beamformed transmission.
13. The method of claim 1 , further comprising:
inferring a set of properties for a channel that the SSB is transmitted over using the first antenna port configuration based at least in part on one or more properties associated with a channel that the paging signal is transmitted over using the second antenna port configuration; and
determining, based at least in part on the inference, that the antenna ports of the first antenna port configuration are quasi co-located with respect to the antenna ports of the second antenna port configuration.
14. The method of claim 13 , wherein:
the set of properties comprise one or more of a delay spread, a Doppler spread, a Doppler shift, an average gain, an average delay, an angle of arrival, and an angle of departure.
15. A method for wireless communication at a user equipment (UE), comprising:
receiving an indication of a first antenna port configuration used to transmit a synchronization signal block (SSB) and a second antenna port configuration used to transmit a paging signal, 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;
determining, based at least in part on the indication, a receive antenna port configuration used to receive the paging signal;
receiving the SSB from a base station; and
receiving a paging signal from the base station, 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.
16. The method of claim 15 , further comprising:
receiving the paging signal using a first receive antenna port configuration, the paging signal received using a second receive antenna port configuration.
17. The method of claim 15 , wherein:
the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.
18. The method of claim 17 , wherein:
the paging indication comprises a paging downlink control indicator (DCI).
19. The method of claim 17 , 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).
20. The method of claim 15 , 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.
21. The method of claim 15 , 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.
22. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
transmit a synchronization signal block (SSB) to a user equipment (UE) using a first antenna port configuration; and
transmit a paging signal to the UE using 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.
23. The apparatus of claim 22 , wherein:
the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.
24. The apparatus of claim 23 , wherein the paging indication comprises a downlink control indicator (DCI).
25. The apparatus of claim 22 , wherein the instructions are further executable by the processor to:
time-division multiplexing (TDM) the SSB and the paging signal.
26. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
receive an indication of a first antenna port configuration used to transmit a synchronization signal block (SSB) and a second antenna port configuration used to transmit a paging signal, 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;
determine, based at least in part on the indication, a receive antenna port configuration used to receive the paging signal;
receive the SSB from a base station; and
receive a paging signal from the base station, 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 associated with the apparatus.
27. A method for wireless communication, comprising:
time-division multiplexing a synchronization signal block (SSB) and a paging signal;
transmitting the SSB to a user equipment (UE) in a different slot than the paging signal; and
transmitting a paging signal to the UE, 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.
28. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
time-division multiplex a synchronization signal block (SSB) and a paging signal;
transmit the SSB to a user equipment (UE) in a different slot than the paging signal; and
transmit a paging signal to the UE, 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.
29. A method for wireless communication, comprising:
receiving a synchronization signal block (SSB) from a base station; and
receiving a paging signal from the base station, wherein the SSB is received in a different slot than the paging signal, and 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.
30. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
receive a synchronization signal block (SSB) from a base station; and
receive a paging signal from the base station, wherein the SSB is received in a different slot than the paging signal, and 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.