Adaptive Network Scanning for Power and Connectivity
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Solution Overview
Problem
Devices in mixed wireless communication systems face issues with intermittent connectivity and power consumption due to the lack of Circuit Switched Fall Back (CSFB) support in some LTE networks, leading to frequent unnecessary scans and potential missed connections to CSFB-supported networks.
Innovation Solution
A method that determines if a network supports CSFB, sets a sliding time period based on the device's motion state, and updates information to decide when to scan for alternative networks, reducing unnecessary scans and conserving power by only scanning when the device has moved out of a non-CSFB area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device frequently scans for LTE networks to ensure connectivity, then the reliability of connection is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the scan behavior adaptive rather than static. The device dynamically adjusts scanning frequency based on real-time conditions including motion state detection, time period tracking, and network availability status. When the device is stationary and in a non-CSFB area, scanning is suppressed to save power. When the device moves or enters CSFB-supported areas, scanning is activated to maintain connectivity, thus resolving the contradiction between reliability and power consumption through dynamic adaptation.
Solution Approach 2:
The patent implements feedback mechanisms where the device continuously monitors motion state, network availability, and scan history to determine optimal scanning behavior. The system uses feedback from motion detectors, network status queries, and previous scan results to intelligently control scanning operations. This feedback loop ensures the device scans only when necessary (when moving or in CSFB areas) while avoiding unnecessary scans in non-CSFB areas, balancing connectivity reliability with power conservation.
2Use of energy by moving object
If the device waits too long to scan for networks, then power consumption is reduced, but the device may miss the chance to reconnect to CSFB-supported LTE networks
Solution Approach 1:
The patent applies preliminary action by proactively determining CSFB support status and motion state before triggering scans. The system preliminarily assesses whether the current area supports CSFB and whether the device is in a motion state that warrants scanning. This preliminary evaluation prevents unnecessary scans while ensuring that scans are triggered in advance when needed (e.g., when entering CSFB-supported areas or when motion is detected), thus avoiding missed reconnection opportunities while conserving power.
Solution Approach 2:
The system dynamically adjusts the scanning strategy based on real-time conditions. When the device detects motion or enters an area known to support CSFB, it activates scanning sooner rather than waiting for a fixed time period. This dynamic timing ensures timely reconnection to CSFB-supported networks while avoiding premature or unnecessary scans in non-CSFB areas, resolving the contradiction between power savings and reconnection reliability.
3Device complexity
If the device uses a simple scan timer to determine when to scan, then device complexity is reduced, but scanning efficiency deteriorates due to unnecessary scans
Solution Approach 1:
The patent applies universality by integrating multiple functions into a unified scan management system. The same control mechanism handles diverse scenarios including motion state detection, CSFB support determination, time period tracking, and scan decision logic. This multi-functional approach maintains manageable complexity while significantly improving scanning efficiency by consolidating control logic that would otherwise require separate simple timers and independent control mechanisms.
Solution Approach 2:
The patent introduces an intermediary control system that mediates between the device's scanning needs and power conservation goals. This intermediary layer processes motion state information, network availability data, and time period calculations to generate intelligent scan decisions. Rather than using simple timers directly, the intermediary coordinates multiple factors to determine optimal scanning moments, improving scanning efficiency while keeping the overall system complexity manageable through structured control architecture.
Data Source
AI summary
A method, system, and apparatus are described for managing a device in a mixed wireless communication system. A device may decide to scan or not scan for a cell based on (or at least on) updating information. The updating information may be used together or individually. The updating information may be maintaining a time window in conjunction with a device's motion status, maintaining a list that tracks cell identity in areas of non-service, or utilizing network deployment information.