Radio link management under bandwidth part switching

Patent metadata

Field	Value
Publication number	US-11368956-B2
Application number	US-201916375674-A
Country	US
Kind code	B2
Filing date	Apr 4, 2019
Priority date	Apr 5, 2018
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that the UE is to switch from a first active bandwidth part to a second active bandwidth part; determine a configuration for a second reference signal of the second active bandwidth part based at least in part on a configuration for a first reference signal of the first active bandwidth part; and receive the second reference signal based at least in part on the configuration for the second reference signal. Numerous other aspects are provided.

First claim

What is claimed is:

1. A method of wireless communication performed by a user equipment (UE), the method comprising:
receiving a configuration for a first reference signal of a first active bandwidth part;
determining a configuration for a second reference signal of a second bandwidth part without receiving the configuration for the second reference signal based at least in part on the configuration for the first reference signal of the first active bandwidth part, wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are quasi-co-located with regard to at least a spatial parameter, and wherein the second bandwidth part is deactivated and to be activated irrespective of whether the first active bandwidth part is deactivated; and
receiving the second reference signal based at least in part on the configuration for the second reference signal.

2. The method of claim 1 , wherein the first reference signal and the second reference signal are for radio link monitoring.

3. The method of claim 1 , wherein the configuration for the first reference signal is based at least in part on radio resource control (RRC) signaling that identifies at least one of:
a frequency at which the first reference signal is received,
a periodicity of the first reference signal,
a timing off set of the first reference signal, or
a subcarrier spacing of the first reference signal.

4. The method of claim 1 , wherein the first reference signal and the second reference signal are channel state information reference signals.

5. The method of claim 4 , wherein the configuration for the first reference signal is based at least in part on radio resource control (RRC) signaling that identifies at least one of:
a resource index of the first reference signal, or
a periodicity of the first reference signal.

6. The method of claim 1 , wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are associated with at least one of:
a same periodicity, or
a same timing offset.

7. The method of claim 1 , wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are associated with a same subcarrier spacing or numerology.

8. The method of claim 1 , further comprising:
determining a numerology of the second reference signal as a numerology of the second bandwidth part.

9. The method of claim 1 , wherein the first reference signal is a first channel state information reference signal (CSI-RS) and the second reference signal is a second CSI-RS, and wherein a numerology of the second CSI-RS is equal to a numerology of the second bandwidth part.

10. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
receive a configuration for a first reference signal of a first active bandwidth part;
determine a configuration for a second reference signal of a second bandwidth part without receiving the configuration for the second reference signal based at least in part on the configuration for the first reference signal of the first active bandwidth part, wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are quasi-co-located with regard to at least a spatial parameter, and wherein the second bandwidth part is deactivated and to be activated irrespective of whether the first active bandwidth part is deactivated; and
receive the second reference signal based at least in part on the configuration for the second reference signal.

11. The UE of claim 10 , wherein the first reference signal and the second reference signal are for radio link monitoring.

12. The UE of claim 10 , wherein the configuration for the first reference signal is based at least in part on radio resource control (RRC) signaling that identifies at least one of:
a frequency at which the first reference signal is received,
a periodicity of the first reference signal,
a timing off set of the first reference signal, or
a subcarrier spacing of the first reference signal.

13. The UE of claim 10 , wherein the first reference signal and the second reference signal are channel state information reference signals.

14. The UE of claim 13 , wherein the configuration for the first reference signal is based at least in part on radio resource control (RRC) signaling that identifies at least one of:
a resource index of the first reference signal, or
a periodicity of the first reference signal.

15. The UE of claim 10 , wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are associated with at least one of:
a same periodicity, or
a same timing offset.

16. The UE of claim 10 , wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are associated with a same subcarrier spacing or numerology.

17. The UE of claim 10 , wherein the one or more processors are further configured to:
determine a numerology of the second reference signal as a numerology of the second bandwidth part.

18. The UE of claim 10 , wherein the first reference signal is a first channel state information reference signal (CSI-RS) and the second reference signal is a second CSI-RS, and wherein a numerology of the second CSI-RS is equal to a numerology of the second bandwidth part.

19. The UE of claim 11 , wherein the first reference signal is a first channel state information reference signal (CSI-RS) and the second reference signal is a second CSI-RS, and wherein the configuration for the second CSI-RS is determined as if the first CSI-RS and the second CSI-RS are associated with a same periodicity.

20. The UE of claim 10 , wherein the first reference signal is a first channel state information reference signal (CSI-RS) and the second reference signal is a second CSI-RS, and wherein the configuration for the second CSI-RS is determined as if the first CSI-RS and the second CSI-RS are associated with a different periodicity.

21. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
receive a configuration for a first reference signal of a first active bandwidth part;
determine a configuration for a second reference signal of a second bandwidth part without receiving the configuration for the second reference signal based at least in part on the configuration for the first reference signal of the first active bandwidth part, wherein the configuration for the second reference signal is determined as if the first reference signal and the second reference signal are quasi-co-located with regard to at least a spatial parameter, and wherein the second bandwidth part is deactivated and to be activated irrespective of whether the first active bandwidth part is deactivated; and
receive the second reference signal based at least in part on the configuration for the second reference signal.

22. The non-transitory computer-readable medium of claim 21 , wherein the first reference signal a

Assignees

• Qualcomm Inc

Inventors

• Ly Hung Dinh
• Lee Heechoon

Classifications

• H04W76/19 Primary

  Connection re-establishment · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W56/0015

  one node acting as a reference for the others · CPC title

• H04L5/0023

  Time-frequency-space · CPC title