UE Mobility Recovery Using T316-Aware SHR Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G mobile communication systems face challenges in maintaining accurate mobility management and network performance due to issues with successful handover report (SHR) determination during Layer 1/Layer 2 triggered mobility (LTM) based recovery, leading to potential corruption of SHR thresholds and subsequent PCell changes.
Innovation Solution
The proposed method involves the user equipment (UE) skipping SHR determination and releasing SHR thresholds configured by the source and target PCells when the T316 timer is running during RRC reconfiguration for LTM-based recovery, thereby optimizing mobility after failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SHR determination is performed during LTM-based recovery, then mobility management accuracy is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by skipping SHR determination when the T316 timer is running during LTM-based recovery procedures. This preemptive measure prevents unnecessary signaling overhead and latency while maintaining accuracy by only performing SHR determination when conditions are favorable (i.e., when T316 is not running).
Solution Approach 2:
The patent implements dynamics by making the SHR determination process adaptive based on the timer state. The UE dynamically decides whether to perform SHR determination based on whether T316 is running or not, optimizing the balance between measurement accuracy and signaling efficiency in real-time.
2Stability of the object's composition
If SHR thresholds are maintained during T316 running, then mobility management consistency is improved, but network performance deteriorates
Solution Approach 1:
The patent applies discarding and recovering by releasing SHR thresholds configured by source and target PCells when T316 is running during LTM-based recovery. This temporary discarding of thresholds prevents network performance degradation, and the thresholds are naturally recovered through subsequent handover procedures when T316 stops running.
3Measurement precision
If SHR determination is performed during LTM-based recovery, then mobility accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts the SHR determination function from the general mobility management process by separating it based on timer state. When T316 is running during LTM-based recovery, the SHR determination is extracted (skipped), simplifying UE processing complexity. When T316 is not running, the full SHR determination process is executed to maintain accuracy.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A user equipment (UE) and a method for managing the mobility of the UE following a radio link failure (RLF) in a communication network system are provided. The method includes receiving, by the UE, a radio resource control (RRC) reconfiguration message to perform ReconfigurationWithSync, determining whether the UE is configured with a successful handover report (SHR) configuration when connected to the source primary cell (PCell), determining whether the RRC reconfiguration message is received while a timer T316 is running, and, if the timer T316 is running, releasing the SHR configuration configured by the source PCell and releasing a threshold Percentage T304 if it is configured by a target PCell.