Conditional PSCell Handling During SCG Failure Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The evaluation of conditional PSCell addition/change upon detection of SCG failure is unnecessary and can lead to ambiguous handling, causing the UE to meet mobility execution conditions while waiting for network reconfiguration.
Innovation Solution
A wireless device evaluates a conditional change of a primary secondary cell (PSCell) based on a mobility command and stops evaluating upon detecting a secondary cell group (SCG) failure, transmitting failure information to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device continues to evaluate conditional PSCell addition/change after detecting SCG failure, then the device maintains mobility readiness, but ambiguous handling occurs and unnecessary processing continues
Solution Approach 1:
The patent extracts the conditional PSCell addition/change evaluation process from continuous operation and suspends it specifically when SCG failure is detected. This selective suspension removes the unnecessary processing component while maintaining the evaluation capability for other scenarios, thereby eliminating ambiguity without permanently losing mobility readiness.
Solution Approach 2:
The evaluation process is made dynamic by introducing a suspend/resume mechanism. When SCG failure is detected, the evaluation is suspended rather than terminated or continued statically. This dynamic adjustment allows the system to adapt processing behavior based on current network conditions, resolving ambiguity while preserving the ability to resume evaluation when appropriate.
2Reliability
If the wireless device waits for network reconfiguration to resolve SCG failure, then proper error handling is ensured, but the device may meet mobility execution conditions during waiting
Solution Approach 1:
The patent applies preliminary anti-action by suspending the conditional PSCell addition/change evaluation before the conflict can occur. By proactively stopping the evaluation process upon detecting SCG failure, the system prevents the scenario where mobility execution conditions might be met during the waiting period for network reconfiguration, thereby avoiding complex conflict management.
3Adaptability or versatility
If conditional PSCell addition/change evaluation continues during SCG failure recovery, then mobility options remain available, but ambiguous handling and unnecessary processing occur
Solution Approach 1:
The patent segments the processing into distinct phases: evaluation phase, suspension phase upon SCG failure detection, and potential resumption phase. This segmentation separates necessary mobility preparations from unnecessary conditional PSCell evaluations during failure recovery, reducing processing complexity while preserving mobility flexibility through the segmented structure.
Data Source
AI summary
A method and apparatus for a secondary cell group (SCG) failure handling with a conditional primary secondary cell (PSCell) configuration in a wireless communication system is provided. A wireless device evaluates a conditional change of PSCell based on a mobility command for the conditional change of the PSCell. Upon detecting a failure on a secondary cell group (SCG), the wireless device stops evaluating the conditional change of the PSCell, and transmits, to the network, information on the failure on the SCG.