Indication of transmission configuration indicator state switching across remote radio heads

Patent metadata

Field	Value
Publication number	US-12452890-B2
Application number	US-202217811755-A
Country	US
Kind code	B2
Filing date	Jul 11, 2022
Priority date	Oct 21, 2021
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

In some aspects, a user equipment (UE) may receive a message that includes an indication that a transmission configuration indicator (TCI) state switch for the UE is to be across a serving remote radio head (RRH) and a next RRH. The UE may adjust a tracking of the UE with respect to the serving RRH and the next RRH based at least in part on the indication. Numerous other aspects are described.

First claim

What is claimed is:

1. A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to cause the UE to:
receive a message that includes an indication that an upcoming transmission configuration indicator (TCI) state switch for the UE is to be across remote radio heads (RRHs) rather than within an RRH, wherein the upcoming TCI state switch is to be across a serving RRH and a next RRH; and
adjust a tracking of the UE with respect to the serving RRH and the next RRH based at least in part on the upcoming TCI state switch being across RRHs.

2. The UE of claim 1 , wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to adjust a tracking algorithm for a timing offset change or a frequency offset change associated with the TCI switch being across the serving RRH and the next RRH.

3. The UE of claim 1 , wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to select a different reference signal for the tracking than a current reference signal for the tracking based at least in part on the indication.

4. The UE of claim 1 , wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to use measurements of a reference signal associated with a new TCI state for the tracking based at least in part on the indication, and wherein the measurements are performed before the upcoming TCI state switch.

5. The UE of claim 1 , wherein the message is a medium access control control element (MAC CE).

6. The UE of claim 1 , wherein the message includes information that indicates a direction of the next RRH with respect to a moving direction of the UE, and wherein the one or more processors, to adjust the tracking, are configured to adjust the tracking based at least in part on the direction.

7. The UE of claim 1 , wherein the message includes information that indicates a range or an estimated value of a timing offset change or a frequency offset change, and wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to adjust the tracking based at least in part on the range or the estimated value of the timing offset change or the frequency offset change.

8. The UE of claim 1 , wherein the one or more processors are configured to cause the UE to receive information that indicates a unidirectional deployment or a bidirectional deployment of RRHs in a network, and wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to adjust the tracking based at least in part on the unidirectional deployment or the bidirectional deployment.

9. The UE of claim 1 , wherein the one or more processors, to cause the UE to adjust the tracking, are configured to cause the UE to adjust the tracking based at least in part on a resource group of the serving RRH being different than a resource group of the next RRH.

10. The UE of claim 1 , wherein the UE is configured for TCI state switching in frequency range 2 (FR2) on a high speed train on a track with RRHs deployed alongside the track.

11. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a message that includes an indication that an upcoming transmission configuration indicator (TCI) state switch for the UE is to be across remote radio heads (RRHs) rather than within an RRH, wherein the upcoming TCI state switch is to be across a serving remote radio head (RRH) RRH and a next RRH; and
adjusting a tracking of the UE with respect to the serving RRH and the next RRH based at least in part on the upcoming TCI state switch being across RRHs.

12. The method of claim 11 , wherein adjusting the tracking includes adjusting a tracking algorithm for a timing offset change or a frequency offset change associated with the TCI switch being across the serving RRH and the next RRH.

13. The method of claim 11 , wherein adjusting the tracking includes selecting a different reference signal for the tracking than a current reference signal for the tracking based at least in part on the indication.

14. The method of claim 11 , wherein adjusting the tracking includes using measurements of a reference signal associated with a new TCI state for the tracking based at least in part on the indication, and wherein the measurements are performed before the upcoming TCI state switch.

15. The method of claim 11 , wherein the message includes information that indicates a direction of the next RRH with respect to a moving direction of the UE, and wherein adjusting the tracking includes adjusting the tracking based at least in part on the direction.

16. The method of claim 11 , wherein the message includes information that indicates a range or an estimated value of a timing offset change or a frequency offset change, and wherein adjusting the tracking includes adjusting the tracking based at least in part on the range or the estimated value of the timing offset change or the frequency offset change.

17. The method of claim 11 , further comprising receiving information that indicates a unidirectional deployment or a bidirectional deployment of RRHs in a network, and wherein adjusting the tracking includes adjusting the tracking based at least in part on the unidirectional deployment or the bidirectional deployment.

18. The method of claim 11 , wherein adjusting the tracking includes adjusting the tracking based at least in part on a resource group of the serving RRH being different than a resource group of the next RRH.

19. The method of claim 11 , wherein the UE is configured for TCI state switching in frequency range 2 (FR2) on a high speed train on a track with RRHs deployed alongside the track.

20. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive a message that includes an indication that an upcoming transmission configuration indicator (TCI) state switch for the UE is to be across remote radio heads (RRHs) rather than within an RRH, wherein the upcoming TCI state switch is to be across a serving RRH and a next RRH; and
adjust a tracking of the UE with respect to the serving RRH and the next RRH based at least in part on the upcoming TCI state switch being across RRHs.

21. The non-transitory computer-readable medium of claim 20 , wherein the one or more instructions that cause the UE to adjust the tracking further cause the UE to:
adjust a tracking algorithm for a timing offset change or a frequency offset change associated with the TCI switch being across the serving RRH and the next RRH.

22. The non-transitory computer-readable medium of claim 20 , wherein the one or more instructions that cause the UE to adjust the tracking further cause the UE to:
select a different reference signal for the tracking than a current reference signal for the tracking based at least in part on the indication.

23. The non-transitory computer-readable medium of claim 20 , wherein the one or more instructions that cause the UE to adjust the tracking further cause the UE to:
use measurements of a reference signal associated with a new TCI state for the tracking based at least in part on the indication, wher

Assignees

• Qualcomm Inc

Inventors

• Huang Chu-Hsiang
• Sankar Hari
• Vallese Pierpaolo
• Ryu Jae Ho
• Park Changhwan
• Minero Paolo
• Nigam Gaurav
• Yoo Jae Won
• Zillmann Peter
• Cabrera Mercader Carlos

Classifications

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04W64/00

  Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B7/022

  Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04) · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title