Disaster Roaming Timer Control for UE HPLMN Search Suspension
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Solution Overview
Problem
In the event of a disaster, user equipment (UE) unnecessarily searches for the Home Public Land Mobile Network (HPLMN) during disaster roaming, leading to unnecessary operations and power consumption.
Innovation Solution
A method and apparatus that adjust the timer for HPLMN search due to disaster roaming, displaying relevant information and preventing the UE from searching for HPLMN until the disaster condition no longer applies, thereby optimizing power usage and reducing unnecessary operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs periodic HPLMN search during disaster roaming, then the UE can detect HPLMN recovery, but unnecessary power consumption and operations occur
Solution Approach 1:
The patent dynamically adjusts the HPLMN search behavior based on the disaster roaming status. When disaster roaming is detected, the periodic HPLMN search is suspended. When disaster roaming ends, the search resumes. This dynamic adaptation eliminates unnecessary operations during disaster roaming while maintaining reliability when needed.
Solution Approach 2:
The patent changes the operational parameters of the HPLMN search function based on the disaster roaming condition. The search timer is modified or suspended when disaster roaming is active, and restored when it ends. This parameter adjustment directly reduces power consumption during periods when HPLMN search would be unnecessary.
2Reliability
If the UE performs periodic HPLMN search during disaster roaming, then the UE can find HPLMN when recovered, but unnecessary operations occur
Solution Approach 1:
The system dynamically controls the HPLMN search operation based on disaster roaming status. The search is suspended during disaster roaming and resumed when it ends, making the operation efficient by avoiding unnecessary executions while maintaining the capability to detect recovery when it occurs.
Solution Approach 2:
The patent extracts the HPLMN search operation from continuous execution and conditions it on the disaster roaming status. By taking out the unnecessary search operations during disaster roaming, the system improves productivity while preserving the essential function of detecting HPLMN recovery.
3Productivity
If the timer for HPLMN search is not adjusted during disaster roaming, then the search continues unnecessarily, but the system structure remains simple
Solution Approach 1:
The patent implements preliminary action by pre-defining the timer adjustment rules for disaster roaming scenarios. The timer is configured to be suspended or modified when disaster roaming is detected, and automatically restored when the condition ends. This preliminary setup simplifies the overall system complexity while achieving high operational efficiency.
Data Source
AI summary
A method for timer T adjustment due to disaster roaming occurrence, and an apparatus for supporting same. A user equipment (UE) determines that a disaster condition applies to a home public land mobile network (HPLMN). Upon selecting a disaster roaming PLMN, the UE performs a first registration procedure for disaster roaming services on the disaster roaming PLMN, and periodically attempts to obtain service on the HPLMN based on a timer T with a first value. Upon selecting a Visited PLMN (VPLMN), the UE performs a second registration procedure on the VPLMN, and periodically attempts to obtain service on the HPLMN based on a timer T with a second value.