# US 2025/0098014 A1 · Method for Conditional Mobility

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- Number: US 2025/0098014 A1
- Document ID: US20250098014A1
- Status: Published application
- Kind: A1
- Application number: 18/962,289
- Filed: 2024-11-27
- Published: 2025-03-20
- Earliest claimed: 2022-08-05
- Assignees: Zte Corporation
- Applicants: ZTE Corporation
- Inventors: Mengjie ZHANG; Zijiang MA; He HUANG; Jing LIU
- Web page: https://patentgrep.com/patent/US20250098014A1

## CPC

- H04W 36/0069: {in case of dual connectivity, e.g. decoupled uplink/downlink}
- H04W 76/20: Manipulation of established connections
- H04W 36/08: Reselecting an access point
- H04W 36/362: {Conditional handover}
- H04W 36/0064: {of control information between different access points}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

This document is directed generally to wireless communications and more specifically to an improvement in handling conditional mobility of wireless terminals. For example, the various implementations disclosed herein help provide an inter-node interaction procedure between master access network nodes (MNs) and secondary access network nodes (MNs) when conditional handover (CHO) and/or conditional PScell addition/change (CPAC) procedure is configured. Example mechanisms are provided for an SN to inform an MN about the execution of secondary cell group (SCG) reconfiguration/update and to provide updated SCG configuration to the MN.

## Claims

### Claim 1

A method for wireless communication comprising:
sending by a secondary wireless communication node (SN) to a master wireless communication node (MN) a request message comprising an indication of an execution of a Secondary Cell Group (SCG) reconfiguration by the SN and an SCG configuration contained in an SN to MN container information element (IE), wherein the request message causes the MN to treat the SCG configuration as having already been applied in a user equipment (UE) and not to forward the SCG configuration to the UE; and
receiving by the SN from the MN a response message associated with the request message.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The method of claim 1, wherein the request message comprises an SN modification required message, and wherein the response message comprises an SN modification confirm message.

### Claim 4

(canceled)

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The method of claim 1, wherein the execution of SCG reconfiguration comprises at least one of:
an execution of an SN initiated intra-SN conditional PSCell change (CPC) procedure; or
an execution of an RRC reconfiguration using signaling radio bearer 3 (SRB3).

### Claim 7 (depends on 6)

The method of claim 6, wherein the execution of the SN initiated intra-SN CPC causes the MN to consider that a conditional reconfiguration, if configured in the UE, has been released due to execution of the SN initiated intra-SN CPC.

### Claim 8 (depends on 7)

The method of claim 7, wherein the conditional reconfiguration comprises at least one of the following:
a conditional handover (CHO); or
an MN initiated conditional PSCell change (CPC).

### Claim 9

A method for wireless communication, comprising:
receiving from a secondary wireless communication node (SN) by a master wireless communication node (MN) a request message comprising an indication of an execution of Secondary Cell Group (SCG) reconfiguration by the SN and an SCG configuration contained in an SN to MN container information element (IE);
treating the SCG configuration as having already been applied in a user equipment (UE) and not forwarding the SCG configuration to the UE; and
transmitting by the MN to the SN a response message associated with the request message.

### Claim 10

(canceled)

### Claim 11 (depends on 9)

The method of claim 9, wherein the request message comprises an SN modification required message, and wherein the response message comprises an SN modification confirm message.

### Claim 12

(canceled)

### Claim 13

(canceled)

### Claim 14 (depends on 9)

The method of claim 9, wherein the execution of SCG reconfiguration comprises at least one of:
an execution of an SN initiated intra-SN conditional PSCell change (CPC) procedure; or
an execution of an RRC reconfiguration using signaling radio bearer 3 (SRB3).

### Claim 15 (depends on 14)

The method of claim 14, wherein the execution of the SN initiated intra-SN CPC causes the MN to consider that a conditional reconfiguration, if configured in the UE, has been released due to execution of the SN initiated intra-SN CPC.

### Claim 16 (depends on 15)

The method of claim 15, wherein the conditional reconfiguration comprises at least one of the following:
a conditional handover (CHO); or
an MN initiated conditional PSCell change (CPC).

### Claim 17

A secondary wireless communication node (SN) comprising a memory for storing instructions and at least one processor configured to execute the instructions to:
send to a master wireless communication node (MN) a request message comprising an indication of an execution of a Secondary Cell Group (SCG) reconfiguration by the SN and an SCG configuration contained in an SN to MN container information element (IE), wherein the request message causes the MN to treat the SCG configuration as having already been applied in a user equipment (UE) and not to forward the SCG configuration to the UE; and
receive from the MN a response message associated with the request message.

### Claim 18

(canceled)

### Claim 19 (depends on 17)

The SN of claim 17, wherein the request message comprises an SN modification required message, and wherein the response message comprises an SN modification confirm message.

### Claim 20 (depends on 17)

The SN of claim 17, wherein the execution of SCG reconfiguration comprises at least one of:
an execution of an SN initiated intra-SN conditional PSCell change (CPC) procedure; or
an execution of an RRC reconfiguration using signaling radio bearer 3 (SRB3).

### Claim 21 (depends on 20)

The SN of claim 20, wherein the execution of the SN initiated intra-SN CPC causes the MN to consider that a conditional reconfiguration, if configured in the UE, has been released due to execution of the SN initiated intra-SN CPC.

### Claim 22 (depends on 21)

The SN of claim 21, wherein the conditional reconfiguration comprises at least one of the following:
a conditional handover (CHO); or
an MN initiated conditional PSCell change (CPC).

### Claim 23

A master wireless communication node (MN) comprising a memory for storing instructions and at least one processor configured to execute the instructions to:
receive from a secondary wireless communication node (SN) a request message comprising an indication of an execution of Secondary Cell Group (SCG) reconfiguration by the SN and an SCG configuration contained in an SN to MN container information element (IE);
treat the SCG configuration as having already been applied in a user equipment (UE) and not forwarding the SCG configuration to the UE; and
transmit to the SN a response message associated with the request message.

### Claim 24 (depends on 23)

The MN of claim 23, wherein the request message comprises an SN modification required message, and wherein the response message comprises an SN modification confirm message.

### Claim 25 (depends on 23)

The MN of claim 23, wherein the execution of SCG reconfiguration comprises at least one of:
an execution of an SN initiated intra-SN conditional PSCell change (CPC) procedure; or
an execution of an RRC reconfiguration using signaling radio bearer 3 (SRB3).

### Claim 26 (depends on 25)

The MN of claim 25, wherein the execution of the SN initiated intra-SN CPC causes the MN to consider that a conditional reconfiguration, if configured in the UE, has been released due to execution of the SN initiated intra-SN CPC.

### Claim 27 (depends on 26)

The MN of claim 26, wherein the conditional reconfiguration comprises at least one of the following:
a conditional handover (CHO); or
an MN initiated conditional PSCell change (CPC).