Wireless Cell Handover Through Phased Reconfiguration Triggers

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing phased reconfigurations between source and target cells due to varying trigger conditions and resource management, leading to inefficiencies and potential service disruptions.

Innovation Solution

A wireless transmit/receive unit (WTRU) employs preconfigured trigger conditions for phased reconfiguration, including phase-in and phase-out triggers, to manage the transition from a source cell to a target cell, optimizing the execution of functions and resource management during this process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If phased reconfiguration is implemented with multiple trigger conditions, then handover reliability is improved, but device complexity increases

Engineering Contradiction:

Improvehandover reliabilityVSAvoidreconfiguration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The reconfiguration process is segmented into distinct phases: phase-in triggers (UL resources available, UL data available, SRB established) and phase-out triggers (snapshot data transmitted, UL resources released, explicit indication received). This segmentation allows the WTRU to manage complex handover by handling trigger conditions in organized stages rather than simultaneously, reducing operational complexity while maintaining reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Trigger conditions are preconfigured before the actual handover execution. The WTRU is provided with predefined phase-in and phase-out trigger conditions in advance, allowing it to automatically respond to handover scenarios without complex real-time decision-making. This preliminary configuration simplifies the execution phase while ensuring reliable handover

Inventive Principle:

Principle #10Preliminary action

2Productivity

If multiple functions are executed simultaneously during reconfiguration, then productivity is improved, but loss of time increases

Engineering Contradiction:

Improvereconfiguration efficiencyVSAvoidhandover time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The reconfiguration process dynamically adjusts the execution of functions based on trigger condition satisfaction. The WTRU can execute functions in different orders and at different rates depending on which triggers are satisfied first (e.g., UL resources becoming available vs. snapshot data transmission completion). This dynamic approach optimizes handover time by adapting to actual network conditions rather than following a rigid sequence

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent ensures continuous execution of useful actions during reconfiguration by maintaining both source and target cell functions simultaneously until appropriate triggers occur. The WTRU continues executing first set of functions toward the source cell while commencing second set of functions toward the target cell, preventing idle time and ensuring productive utilization of the handover period

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If trigger conditions are monitored continuously, then reliability is improved, but use of energy increases

Engineering Contradiction:

Improvehandover reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuous monitoring, the system monitors trigger conditions at specific periodic intervals or events. The WTRU checks for phase-in and phase-out trigger conditions when relevant events occur (e.g., when UL resources become available, when snapshot data is transmitted). This periodic monitoring approach maintains reliable handover detection while significantly reducing energy consumption compared to continuous monitoring

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12439308B2System and methods for phased reconfiguration in wireless systems

Publication Date: 2025.10.07 INTERDIGITAL PATENT HOLDINGS INC

AI summary

A system and methods for performing phased reconfiguration in a wireless communications system are disclosed. A wireless transmit/receive unit (WTRU) may perform a phased reconfiguration from a source cell to a target cell. The WTRU may be connected to the source cell and may execute a first set of functions towards the source cell. The WTRU may monitor for a first set of preconfigured trigger conditions and a second set of preconfigured trigger conditions. The WTRU may commence a second set of functions towards the target cell based on detection of at least one of the first set of preconfigured trigger conditions while continuing to execute the first set of functions towards the source cell. The WTRU may cease to perform at least a subset of the first set of functions towards the source cell based on detection of at least one of the second set of preconfigured trigger conditions.