Surveillance System With Wi-Fi Fallback Relay
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Solution Overview
Problem
Existing tracking band systems are insufficient for effectively monitoring diverse targets in varying situations, as they lack the capability to ensure continuous and reliable data transmission across different networks and environments.
Innovation Solution
A surveillance system comprising a device worn by the monitoring target, a server, and a portable relay device that enables communication between the device and the server. The system includes a detection mechanism for acquiring monitoring information, a transmission mechanism for sending this information via a relay device or alternative networks, and control signals for managing device operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device transmits monitoring information through the relay device, then the communication is stable and controlled, but the system complexity increases and the transmission path becomes longer
Solution Approach 1:
The relay device serves as an intermediary between the monitoring device and the server, receiving transmission data from both parties and forwarding it appropriately. This mediator approach ensures stable and controlled communication while managing the complexity by centralizing the relay functions in a dedicated component.
2Reliability
If the device searches for alternative networks when relay device interconnection is unavailable, then the communication continuity is improved, but the energy consumption increases
Solution Approach 1:
The device performs preliminary actions by maintaining a list of alternative networks in advance. When the relay device connection becomes unavailable, the device can immediately switch to a pre-identified alternative network without extensive searching, thus ensuring communication continuity while minimizing additional energy consumption.
3Area of stationary object
If the server monitors position information outside tracking areas, then the surveillance coverage is expanded, but the data processing load increases
Solution Approach 1:
The server implements local quality monitoring by focusing detailed analysis only on position information that falls outside predefined tracking areas. Normal positions within tracking areas are processed with minimal overhead, while exceptional cases (positions outside areas) receive enhanced monitoring attention, thus expanding surveillance coverage without proportionally increasing data processing load.
4Speed
If the relay device transmits attention signals when interconnection probability decreases, then the system responsiveness is improved, but the false alarm rate increases
Solution Approach 1:
The relay device uses feedback from interconnection probability assessments to determine when to transmit attention signals. By continuously monitoring connection quality and comparing it against thresholds, the system achieves responsive alerting while filtering out minor fluctuations that would cause false alarms, thus balancing responsiveness with information accuracy.
Data Source
AI summary
A surveillance system can realize suitable tracking. A tracking band surveillance system composed of a tracking band 1, a smartphone 2, and a server 3 starts searching for free Wi-Fi and transmits data from the tracking band 1 to the server 3 via the searched free Wi-Fi on condition that interconnection between the tracking band 1 and the smartphone 2 has become impossible.