Conditional Cell Reconfiguration for Wireless Mobility Impairments
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing mobility and handover processes, particularly in scenarios involving impairment events, leading to potential handover failures and suboptimal network performance.
Innovation Solution
Implementing conditional reconfiguration mechanisms in wireless transmit/receive units (WTRUs) that include trigger conditions and configured target cells, allowing for seamless handovers or reestablishments based on detected impairment events, thereby optimizing mobility management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used in wireless systems, then the system operates with simpler mobility management, but handover failures occur and network performance deteriorates under impairment events
Solution Approach 1:
The system performs preliminary actions by pre-configuring conditional reconfiguration parameters and target cell information before impairment events occur. The WTRU is prepared with multiple potential target cells and their corresponding reconfiguration parameters, enabling rapid handover execution when impairment events are detected without requiring complex real-time decision-making during the handover process.
Solution Approach 2:
The WTRU autonomously evaluates impairment events against trigger conditions and independently executes handover to pre-configured target cells without requiring continuous network intervention. This self-service capability reduces handover failures by enabling the device to rapidly respond to radio link failures and other impairment events using locally stored conditional reconfiguration parameters.
2Reliability
If conditional reconfiguration mechanisms are implemented to reduce handover failures, then handover reliability improves, but the device complexity and processing requirements increase
Solution Approach 1:
The conditional reconfiguration mechanism is segmented into distinct components: trigger condition definitions, target cell configurations, and execution logic. This segmentation allows the system to manage complexity by organizing conditional reconfiguration parameters into structured, modular elements that can be independently evaluated and executed based on specific impairment events.
Solution Approach 2:
The system utilizes parameter changes by configuring multiple target cells with different reconfiguration parameters and evaluating trigger conditions based on changing radio conditions. When impairment events cause parameter thresholds to be exceeded, the WTRU executes the appropriate conditional reconfiguration, transforming static mobility management into a dynamic, condition-based system that adapts to varying network conditions.
Data Source
AI summary
Methods, devices, and systems for communication by a wireless transmit/receive unit (WTRU) associated with a source cell. The WTRU is configured with a conditional reconfiguration which includes a trigger condition and a configured target cell. The WTRU detects an occurrence of an impairment event resulting in impairment to operation of the WTRU in the source cell. If the impairment event satisfies the trigger condition, a reconfiguration is performed with the configured target cell. If the impairment event does not satisfy the trigger condition, a target cell is selected based on a cell selection procedure, and if the WTRU is configured with a conditional reconfiguration for the selected target cell, a reconfiguration is performed with the selected target cell; and if the WTRU is not configured with a conditional reconfiguration for the target cell, a reestablishment is performed with the selected target cell.