Stored Conditional Configuration Handling After Multi-Connectivity Failure
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Solution Overview
Problem
Conditional mobility configurations in New Radio (NR) systems increase signaling overhead and delay mobility, particularly in multi-connectivity scenarios, due to the potential for unnecessary procedures and mismatches between wireless devices and network nodes.
Innovation Solution
Wireless devices handle stored conditional configurations by either deleting or maintaining parts of the configuration upon failure detection, with network nodes adapting their assumptions accordingly to prevent mismatches and reduce signaling overhead through delta signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices store conditional configurations for mobility procedures, then mobility robustness is improved, but signaling overhead increases and device-network synchronization deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the state of conditional configurations based on failure detection. When a failure is detected, the system changes the configuration state from active monitoring to suspended or deleted, thereby reducing signaling overhead while maintaining mobility robustness through selective configuration handling
Solution Approach 2:
The patent implements dynamics by making the configuration management adaptive and flexible. The system dynamically adjusts its behavior based on failure conditions, switching between different handling modes (suspending monitoring, deleting configurations, or maintaining them) to optimize the balance between reliability and signaling overhead in real-time
2Productivity
If wireless devices continue to monitor trigger conditions after failure detection, then mobility procedures may be executed, but unnecessary procedures are triggered and signaling overhead increases
Solution Approach 1:
The patent applies the extraction principle by removing or suspending the monitoring of trigger conditions when failure is detected. This extracts the unnecessary monitoring function from the active state, preventing wasteful signaling and energy consumption while preserving the ability to execute mobility procedures when conditions are favorable and failure is not present
3Stability of the object's composition
If wireless devices delete stored conditional configurations upon failure detection, then device-network alignment is improved, but mobility procedures may be delayed
Solution Approach 1:
The patent applies preliminary action by preparing multiple failure handling options in advance (deleting configurations, suspending monitoring, or maintaining them). This allows the system to pre-establish the appropriate response strategy before actual failure occurs, enabling rapid alignment with network expectations while minimizing delays through predetermined handling procedures
Data Source
AI summary
A method is performed by a wireless device. The method comprises detecting a failure associated with a cell group in multi-connectivity operation. The method also comprises, responsive to detecting the failure, suspending monitoring of one or more trigger conditions whose fulfillment is to trigger execution of a conditional configuration stored at the wireless device.