Personal Location Tracker Power Management via Dead Reckoning

The patent implements periodic wake-up cycles where the device alternates between low-power sleep mode and active monitoring mode. The GPS receiver and cellular radio are activated only during specific wake-up intervals to check for location updates and communication needs, rather than remaining continuously powered. This periodic operation significantly reduces average power consumption while maintaining operational reliability.

The patent employs dynamic power management that adjusts the operational state of GPS and cellular components based on real-time conditions. The system dynamically transitions between different power states (fully active, partially active, sleep mode) depending on whether location tracking, communication, or both are currently needed, optimizing the balance between reliability and battery life.

The GPS receiver is activated periodically rather than continuously to acquire and update location data. During sleep intervals, the receiver remains inactive to conserve power, then wakes up at predetermined intervals to perform location fixes. This approach maintains sufficient location precision for monitoring purposes while dramatically reducing overall power consumption.

The system performs preliminary location fixes during wake-up cycles and stores these positions for later use. By preparing location data in advance during brief active periods, the system can extend the time between GPS acquisitions without compromising the ability to provide accurate location information when needed.