Reconfiguration for lower layer mobility

Patent metadata

Field	Value
Publication number	US-12587909-B2
Application number	US-202218045720-A
Country	US
Kind code	B2
Filing date	Oct 11, 2022
Priority date	Oct 11, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, which may be a layer 1 (L1)/layer 2 (L2) handover procedure. The UE may receive a second control message indicating a first or second reset procedure, which may each indicate a respective set of operating parameters for a higher layer than L1/L2 in the protocol stack. The UE may perform the lower layover handover procedure, which may include switching from a first serving cell to a second serving cell. The UE may perform the first or second reset procedure based on the switching, where the first reset procedure may include maintaining the operating parameters of the second serving cell, and the second reset procedure may include switching the operating parameters of the second serving cell.

First claim

What is claimed is:

1 . A method for wireless communication at a user equipment (UE), comprising:
receiving a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, wherein the lower layer handover procedure comprises one of a layer 1 handover procedure or a layer 2 handover procedure; receiving a second control message indicating one of a first reset procedure for the lower layer handover procedure or a second reset procedure for the lower layer handover procedure, wherein the first reset procedure indicates a first set of operating parameters for a higher layer than both layer 1 and layer 2 in a protocol stack, wherein the second reset procedure indicates a second set of operating parameters for the higher layer; and performing the lower layer handover procedure based at least in part on the set of mobility parameters and one of the first reset procedure or the second reset procedure.

2 . The method of claim 1 , further comprising:
switching from a first serving cell to a second serving cell based at least in part on performing the lower layer handover procedure, wherein the first serving cell and the second serving cell correspond to a same distributed unit; performing the first reset procedure based at least in part on switching to the second serving cell; and communicating with the second serving cell in accordance with the first set of operating parameters.

3 . The method of claim 2 , wherein performing the first reset procedure comprises:
applying the first set of operating parameters to the second serving cell, wherein the first set of operating parameters were previously applied to the first serving cell.

4 . The method of claim 2 , further comprising:
applying a secondary primary cell configuration to the second serving cell based at least in part on switching to the second serving cell.

5 . The method of claim 1 , further comprising:
switching from a first serving cell associated with a first distributed unit to a second serving cell associated with a second distributed unit based at least in part on performing the lower layer handover procedure; performing the second reset procedure based at least in part on switching to the second serving cell; and communicating with the second serving cell in accordance with the second set of operating parameters.

6 . The method of claim 5 , wherein performing the second reset procedure comprises:
applying the second set of operating parameters to the second serving cell, wherein the second set of operating parameters reset the first set of operating parameters previously applied to the first serving cell.

7 . The method of claim 5 , wherein performing the second reset procedure comprises:
performing a portion of the second reset procedure based at least in part on switching to the second serving cell, wherein the portion of the second reset procedure comprises resetting a medium access control layer of the protocol stack.

8 . The method of claim 1 , wherein receiving the second control message comprises:
receiving an information element indicating that the second reset procedure is enabled or disabled.

9 . The method of claim 1 , wherein receiving the second control message comprises:
receiving a layer 1 signal or a layer 2 signal that enables one of the first reset procedure or the second reset procedure.

10 . The method of claim 1 , further comprising:
performing the first reset procedure or the second reset procedure based at least on part on the set of mobility parameters.

11 . The method of claim 10 , wherein the set of mobility parameters indicates one or more serving cells of the UE and one or more corresponding distributed units.

12 . A method for wireless communication at a central unit (CU) comprising:
outputting a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, wherein the lower layer handover procedure comprises one of a layer 1 handover procedure or a layer 2 handover procedure; and outputting a second control message indicating one of a first reset procedure for the lower layer handover procedure or a second reset procedure for the lower layer handover procedure, wherein the first reset procedure indicates a first set of operating parameters for a higher layer than both layer 1 and layer 2 in a protocol stack, and wherein the second reset procedure indicates a second set of operating parameters for the higher layer.

13 . The method of claim 12 further comprising:
communicating with a user equipment (UE) via a serving cell in accordance with the first set of operating parameters.

14 . The method of claim 12 , further comprising:
communicating with a UE via a serving cell in accordance with the second set of operating parameters.

15 . The method of claim 12 , wherein outputting the second control message comprises:
outputting an information element indicating that the second reset procedure is enabled or disabled.

16 . The method of claim 12 , wherein outputting the second control message comprises:
outputting the second control message indicating the first reset procedure and the second reset procedure.

17 . The method of claim 12 , wherein the set of mobility parameters indicates one or more serving cells of a UE and one or more corresponding distributed units.

18 . An apparatus for wireless communication at a user equipment (UE), comprising:
one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to:
receive a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, wherein the lower layer handover procedure comprises one of a layer 1 handover procedure or a layer 2 handover procedure;
receive a second control message indicating one of a first reset procedure for the lower layer handover procedure or a second reset procedure for the lower layer handover procedure, wherein the first reset procedure indicates a first set of operating parameters for a higher layer than both layer 1 and layer 2 in a protocol stack, wherein the second reset procedure indicates a second set of operating parameters for the higher layer; and
perform the lower layer handover procedure based at least in part on the set of mobility parameters and one of the first reset procedure or the second reset procedure.

19 . The apparatus of claim 18 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
switch from a first serving cell to a second serving cell based at least in part on performing the lower layer handover procedure, wherein the first serving cell and the second serving cell correspond to a same distributed unit; perform the first reset procedure based at least in part on switching to the second serving cell; and communicate with the second serving cell in accordance with the first set of operating parameters.

20 . The apparatus of claim 19 , wherein the instructions to perform the first reset procedure are executable by the one or more processors to cause the apparatus to:
apply the first set of operating parameters to the second serving cell, wherein the first set of operating parameters were previously applied to the first serving cell.

21 . The apparatus of c

Assignees

• Qualcomm Inc

Inventors

• Zhou Shanyu
• Damnjanovic Jelena
• Kumar Rajeev
• Ozturk Ozcan

Classifications

• H04W36/06

  Reselecting a communication resource in the serving access point · CPC title

• H04W36/0061

  of neighbour cell information · CPC title

• H04W36/087

  between radio units of access points · CPC title

• H04W36/0016 Primary

  Hand-off preparation specially adapted for end-to-end data sessions · CPC title

• H04W36/0055 Primary

  Transmission or use of information for re-establishing the radio link · CPC title