Mobile Device Emergency Data Synchronization in Low Coverage
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Solution Overview
Problem
In areas with low or no cellular coverage, mobile devices struggle to communicate their location information to emergency services, as they lack a means to transmit data to external servers effectively.
Innovation Solution
Mobile devices utilize short-range wireless transfer mechanisms like Wi-Fi and Bluetooth to synchronize and transmit data directly with nearby devices, allowing them to build a history of location information, which is then uploaded to a server when coverage improves, enabling emergency response entities to access this data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices use traditional cellular network communication to transmit location data to emergency services, then the communication reliability is improved, but the system becomes unusable in areas with low or no cellular coverage
Solution Approach 1:
The patent introduces intermediate mobile devices as mediators that collect and store location data from devices in low-coverage areas, then forward this data when connectivity is restored. This intermediary mechanism enables communication reliability without requiring continuous cellular coverage, allowing the system to function in previously unusable areas.
Solution Approach 2:
The system performs preliminary actions by pre-collecting and caching location data, device identifiers, and timestamps in the device's local storage before connectivity is lost or while in low-coverage areas. This preliminary data accumulation ensures that critical information is ready for immediate transmission when network coverage becomes available, maintaining reliability without continuous connection.
2Loss of information
If mobile devices continuously transmit location data to servers, then the information availability for emergency services is improved, but the energy consumption increases
Solution Approach 1:
Instead of continuous transmission, the system implements periodic action by transmitting location data only at specific trigger events: when connectivity is restored, when emergency conditions are detected, or at scheduled intervals when in coverage areas. This event-driven periodic transmission maintains information availability while dramatically reducing energy consumption compared to continuous monitoring and reporting.
Solution Approach 2:
The patent extracts only the essential critical information (location coordinates, timestamp, device identifier) needed for emergency response and transmits only this extracted data subset. By filtering and transmitting only the most important data elements rather than continuous streams of all device sensors, the system maintains information availability for emergency services while minimizing transmission energy consumption.
3Loss of information
If mobile devices store location history locally for later transmission, then the information completeness is improved, but the device storage requirements increase
Solution Approach 1:
The system creates lightweight copies of essential location data (coordinates, timestamp, device ID) in a optimized format suitable for emergency response. These copied data structures are much smaller than full device state information, allowing comprehensive location history to be stored locally with minimal storage overhead. The copying process extracts only the critical emergency-response-relevant information while discarding redundant data.
Solution Approach 2:
The patent implements a selective data retention strategy that discards redundant or non-critical information while preserving essential location data needed for emergency response. The system recovers and prioritizes only the most valuable information (location coordinates, timing data) for long-term local storage, while allowing non-essential data to be overwritten or discarded when storage is full, thus maintaining information completeness for emergencies without excessive storage requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures that location and other relevant data can be communicated to emergency services even in areas with no cellular coverage, enhancing the efficiency and safety of emergency response by providing critical information when needed.
Implementation Method 1
GPS technology determines positional information of a GPS receiver such as a mobile device based on measuring signal transfer times between satellites having known positions and the GPS receiver. The signal transfer time of a signal is proportional to a distance of a respective satellite from the GPS receiver.
Data Source
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AI summary
Techniques for transferring device-related content between mobile devices in low coverage areas are provided. In emergency situations, various information (e.g., current location coordinates, time-stamp, location history, sensor measurements and other device-related or network-related information) may be useful to emergency services. However, this information may be difficult to provide to an external server in areas of low or no cellular coverage. Thus, provided techniques enable mobile devices to communicate with each other in low coverage areas to build up a history of information that may be useful in an emergency situation.