QUASI CO-LOCATION OF ANTENNA PORTS USED TO TRANSMIT PAGING MESSAGE AND SYNCHRONIZATION SIGNALS

• US 20180288737A1
• Filed: 03/08/2018
• Published: 10/04/2018
• Est. Priority Date: 04/03/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Islam, Muhammad Nazmul
• Granted Patent: US 10,779,259 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

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.

Claims

1. A method for wireless communication, comprising:

transmitting a reference signal to a user equipment (UE); and

transmitting a paging signal to the UE, wherein the reference signal and a demodulation reference signal (DMRS) of the paging signal are quasi co-located.

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 reference signal and the paging signal.

6. The method of claim 5, wherein:

TDM the reference signal and the paging signal comprises;

transmitting the reference signal in the same slot as the paging signal.

7. The method of claim 5, wherein:

TDM the reference signal and the paging signal comprises;

transmitting the reference signal in a different slot than the paging signal.

8. The method of claim 1, wherein:

the reference signal is transmitted using a first antenna port configuration and the paging signal is transmitted using a second antenna port configuration, and

wherein first antenna port configuration used to transmit the reference signal comprises antenna ports that are quasi co-located with respect to antenna ports of the second antenna port configuration used to transmit the paging signal.

9. The method of claim 8, further comprising:

transmitting an indication of the quasi co-located antenna ports of the first antenna port configuration and the second antenna port configuration.

10. The method of claim 9, 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.

11. The method of claim 9, wherein:

the indication is transmitted using a different carrier than the reference signal and the paging signal.

12. The method of claim 1, wherein:

the reference signal 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.

13. The method of claim 1, further comprising:

transmitting the reference signal in a first beamformed transmission; and

transmitting the paging signal in a second beamformed transmission.

14. The method of claim 1, further comprising:

inferring a set of properties for a channel that the reference signal is transmitted over using a 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 a 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.

15. The method of claim 14, 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.

16. The method of claim 1, wherein the reference signal and the DMRS of the paging signal are quasi co-located with respect to receive beamforming.

17. A method for wireless communication, comprising:

receiving a reference signal transmitted from a base station; and

receiving a paging signal from the base station, wherein the reference signal and a demodulation reference signal (DMRS) of the paging signal are quasi co-located.

18. The method of claim 17, further comprising:

receiving the paging signal using a first receive antenna port configuration, the paging signal received using a second receive antenna port configuration.

19. The method of claim 17, wherein:

the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.

20. The method of claim 19, wherein:

the paging indication comprises a paging downlink control indicator (DCI).

21. The method of claim 19, 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).

22. The method of claim 17, further comprising:

receiving an indication of a first antenna port configuration used to transmit the reference signal and a second antenna port configuration used to transmit the 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; and

determining, based at least in part on the indication, a receive antenna port configuration used to receive the paging signal.

23. The method of claim 22, 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.

24. The method of claim 17, wherein:

the reference signal 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.

25. The method of claim 17, wherein:

the reference signal and the DMRS of the paging signal are quasi co-located with respect to receive beamforming.

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;

transmit a reference signal to a user equipment (UE); and

transmit a paging signal to the UE, wherein the reference signal and a demodulation reference signal (DMRS) of the paging signal are quasi co-located.

27. The apparatus of claim 26, wherein:

the paging signal comprises at least one of a paging message, a paging schedule, or a paging indication.

28. The apparatus of claim 27, wherein the paging indication comprises a downlink control indicator (DCI).

29. The apparatus of claim 26, wherein the instructions are further executable by the processor to:

time-division multiplexing (TDM) the reference signal and the paging signal.

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 reference signal from a base station; and

receive a paging signal from the base station, wherein the reference signal and a demodulation reference signal (DMRS) of the paging signal are quasi co-located.