Inter-gNB Path Handover With Target Relay UE Preconfiguration

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Solution Overview

Problem

Existing path handover methods in communication systems do not adequately address inter-gNB handover scenarios, requiring signaling interactions between source and target nodes and failing to involve the target base station in relay UE configuration, leading to potential handover failures and delays.

Innovation Solution

A method and device for path handover involving a target node that receives a request message, configures a target relay UE, and sends configuration information, with the relay UE providing indication of successful configuration, ensuring seamless handover through inter-gNB scenarios.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the existing path handover process is used in inter-gNB handover scenarios, then signaling interactions between source and target nodes are required, but the relay UE configuration cannot be properly performed by the target base station

Engineering Contradiction:

Improvehandover success rateVSAvoidapplicability to inter-gNB handover

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The target base station performs relay UE configuration in advance during the handover preparation phase, before the handover is executed. This preliminary configuration ensures that the relay UE is ready to operate under the target base station when handover occurs, resolving the issue of unable to configure relay UE by target base station in existing processes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of having the source base station configure the relay UE (as in existing processes), the invention inverts the configuration role to the target base station. This inversion allows the target base station to directly configure the relay UE, making the process adaptable to inter-gNB handover scenarios where the target base station needs control over relay resources

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If the source base station configures the relay UE in inter-gNB handover, then configuration can be performed, but handover delays and failures occur due to lack of target node involvement

Engineering Contradiction:

Improveconfiguration capabilityVSAvoidhandover delay

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The target base station configures the relay UE in advance during handover preparation, so that when handover is executed, the relay UE is already configured and ready. This eliminates post-handover configuration delays and ensures seamless transition, reducing handover time significantly

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention introduces feedback mechanisms where the target base station receives handover request information from the source base station, processes the relay UE configuration, and provides confirmation back. This feedback loop ensures proper coordination between source and target nodes, preventing handover failures due to misconfiguration or timing issues

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260025720A1Path switching method, apparatus, device, and storage medium

Publication Date: 2026.01.22 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for path handover is performed by a target node, and includes: receiving a request message sent by a source node, wherein the request message is configured to request the target node to prepare for the path handover; and sending configuration information to a target relay user equipment (UE).