Sleep/Wake Scheduling via Coverage Prediction
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Solution Overview
Problem
Battery-powered communication devices face inefficiencies in energy conservation due to unsynchronized sleep/wake cycles, leading to unnecessary power consumption when out of communication range with other devices.
Innovation Solution
A module and method for scheduling sleep/wake intervals based on coverage predictions, where devices are awakened during predicted communication intervals and powered down during non-communication intervals, optimizing energy use by ensuring the transceiver is only active when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If devices use traditional sleep/wake cycles with fixed timing, then battery power is conserved during sleep intervals, but energy is wasted when devices wake up outside of actual communication range
Solution Approach 1:
The system performs preliminary actions by predicting future coverage intervals before they occur. The server calculates and provides advance notice of when communication platforms will be within range, allowing devices to schedule their wake intervals precisely for these predicted times rather than using fixed periodic wake cycles. This preliminary prediction eliminates wasted energy from waking during non-communication periods.
Solution Approach 2:
The sleep/wake schedule is made dynamic by adjusting wake intervals based on predicted communication availability rather than using fixed periodic timing. The system adapts the wake schedule to match the dynamic movement patterns of communication platforms, ensuring devices are awake only when communication is actually possible, thereby eliminating unnecessary power consumption.
2Reliability
If devices remain awake continuously to ensure communication availability, then communication reliability is maintained, but battery power is depleted rapidly
Solution Approach 1:
The server performs preliminary calculation of coverage intervals based on known platform trajectories and provides advance scheduling information to devices. This allows devices to confidently enter sleep mode during periods when communication is impossible, knowing exactly when to wake for guaranteed communication opportunities, thus maintaining reliability while reducing power consumption.
Solution Approach 2:
The system uses feedback from predicted coverage intervals to optimize the sleep/wake schedule. By continuously aligning wake intervals with predicted communication windows based on platform movement patterns, the system ensures communication reliability is maintained at the minimum necessary power consumption level.
3Ease of operation
If devices use synchronized fixed wake intervals, then coordination between devices is simplified, but communication efficiency decreases when platforms are not within range
Solution Approach 1:
The server performs preliminary calculation of coverage intervals and provides a coordinated schedule to all devices in advance. This maintains the simplicity of synchronized operation while dramatically improving communication efficiency, as all devices wake during the same predicted communication windows when platforms are actually within range, rather than using arbitrary fixed intervals.
Data Source
AI summary
Embodiments for a module for scheduling sleep/wake intervals for a first one or more communication devices are disclosed. The module includes a computer readable medium having instructions thereon. The instructions, when executed by one or more processing devices, cause the one or more processing devices to obtain a coverage prediction for the one or more mobile communication devices. The coverage prediction indicates a start and an end of at least one future interval during which one or more orbiting communication platforms are predicted to be within range of the one or more mobile communication devices. The instructions also cause the one or more processing devices to generate at least one future sleep interval having a start and an end and at least one future wake interval having a start and an end to control the one or more mobile communication devices based on the coverage prediction.