Conditional Handover Resource Management for Signaling Overhead Reduction

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Solution Overview

Problem

The existing Conditional HandOver (CHO) mechanism lacks effective solutions for normal operation between User Equipment (UE) and source/base stations, particularly during sudden channel quality declines or high-speed movements, leading to inefficient resource allocation and increased signaling overhead.

Innovation Solution

The proposed CHO-based processing method involves configuring priority information and dedicated random access resources for candidate network devices, using timers to manage resource validity and releasing resources when priorities are low, and notifying devices of HO cancellations to optimize resource usage and reduce signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dedicated random access resources are configured for CHO for a long duration, then the reliability of handover is improved, but the resource occupation time increases and resource efficiency decreases

Engineering Contradiction:
Improvehandover reliabilityVSAvoidresource occupation duration
Core Design Contradiction:
ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent applies dynamics by making the dedicated random access resource configuration time-limited rather than permanent. The source network device configures the resource with a validity period, and automatically releases it after the period expires or when handover is completed. This dynamic adjustment allows the system to maintain reliability during the critical handover window while avoiding long-term resource occupation, thus resolving the contradiction between reliability and resource efficiency.

Inventive Principle:
Principle #15Dynamics

2Reliability

If CHO configuration is maintained indefinitely, then the handover robustness is improved, but the signaling overhead increases

Engineering Contradiction:
Improvehandover robustnessVSAvoidsignaling overhead
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts the essential function of CHO configuration by removing unnecessary long-term maintenance. The source network device configures the dedicated random access resource only when needed for handover, and explicitly releases it afterward. This extraction of the temporary configuration function reduces signaling overhead while maintaining handover robustness during the critical period, resolving the contradiction between robustness and signaling overhead.

Inventive Principle:
Principle #2Taking out (Extraction)

3Device complexity

If priority information is not sent to candidate network devices, then the device complexity is reduced, but the resource allocation efficiency decreases

Engineering Contradiction:
Improvesignaling complexityVSAvoidresource allocation efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent applies local quality by sending priority information selectively only to candidate network devices that are potential handover targets, rather than to all network devices. The source network device determines which candidate devices need priority information based on their suitability as handover targets, and only configures priority indicators for those specific devices. This selective approach maintains resource allocation efficiency for critical handover candidates while reducing overall signaling complexity, resolving the contradiction between complexity and efficiency.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS12120504B2Conditional handover processing method and apparatus, related device, and storage medium
Publication Date: 2024.10.15 CHINA MOBILE COMM GRP CO LTD
  • US12120504B2 patent drawing
  • US12120504B2 patent drawing
  • US12120504B2 patent drawing

AI summary

The present application discloses a conditional handover (CHO) processing method and apparatus, a related device, and a storage medium. The method comprises: a first network device determining that CHO configuration information is invalid and indicating to a terminal that the CHO configuration information is invalid.