Conditional Mobility Failure Recovery in Wireless Systems
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Solution Overview
Problem
In wireless communications, user equipment (UE) faces challenges in detecting and recovering from failures such as mobility failure, radio link failure, and beam failure, especially in New Radio (NR) systems that require efficient failure detection and recovery mechanisms to maintain communication quality.
Innovation Solution
A method and apparatus for a UE to receive a mobility command with an execution condition and recovery information, detect a cell group failure, evaluate the execution condition, and perform mobility to a target cell group based on the fulfilled condition, enabling efficient failure recovery in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs immediate mobility upon failure detection, then service continuity is improved, but the accuracy of failure recovery is worsened because the execution condition may not be fulfilled
Solution Approach 1:
The patent applies preliminary action by pre-configuring execution conditions in the mobility command before failure occurs. When failure is detected, the UE evaluates whether the pre-configured execution condition is fulfilled before performing mobility. This ensures that mobility is only executed when appropriate conditions are met, improving failure recovery accuracy while maintaining service continuity through conditional mobility procedures.
2Manufacturing precision
If the UE evaluates execution condition after failure detection, then failure recovery accuracy is improved, but service continuity is worsened due to additional evaluation time
Solution Approach 1:
The execution condition is configured in advance as part of the mobility command, so the UE does not need to determine conditions during the recovery process. The UE only needs to evaluate whether the pre-configured condition is fulfilled, which minimizes evaluation time while ensuring accurate recovery decisions.
3Reliability
If the mobility command includes recovery information, then failure recovery capability is improved, but device complexity is worsened
Solution Approach 1:
The patent merges the execution condition and recovery information directly into the mobility command structure. This integration allows the UE to receive all necessary information for conditional mobility in a single command, improving failure recovery capability without requiring separate signaling messages or complex multi-step procedures.
Data Source
AI summary
The present disclosure relates to failure detection and recovery in wireless communications. According to an embodiment of the present disclosure, a method performed by a user equipment (UE) configured to operate in a wireless communication system comprises: receiving a mobility command for a target cell group (CG), wherein the mobility command comprises an execution condition for a mobility to the target CG, and recovery information informing that the execution condition is used as a condition for a failure recovery; detecting a failure of a CG; evaluating the execution condition based on the recovery information after detecting the failure of the CG; and performing the mobility to the target CG based on the execution condition being fulfilled.