Emergency Notification System Using Zone-Based Wireless Access
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Solution Overview
Problem
Existing emergency notification systems fail to provide location-specific information effectively during emergencies, as they often rely on broadcasting to all cells, which can lead to network congestion and irrelevant information being sent to users, especially in large or dynamic disaster scenarios.
Innovation Solution
A method and system that utilize a telecommunications network and local wireless access points to deliver targeted emergency information to mobile devices, where a general emergency signal triggers the retrieval of locally relevant information from a server, reducing network overload and ensuring accuracy based on the user's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If cell broadcast service is used to send emergency information to all mobile phones in a cell area, then the coverage area and number of recipients are improved, but the network congestion and irrelevance of information to specific locations worsen
Solution Approach 1:
The system divides the cell area into multiple geographic zones (e.g., zones A, B, C) and assigns different emergency information to each zone. Mobile devices receive information specific to their current location rather than generic cell-wide information, making the information locally relevant and actionable.
Solution Approach 2:
The broadcast information is segmented by geographic zone, with each segment containing emergency instructions tailored to that specific area. This allows the system to maintain broad coverage while delivering localized information to appropriate audiences.
2Area of stationary object
If cell broadcast service is used to send emergency information to all mobile phones in a cell area, then the coverage area is improved, but the network congestion worsens
Solution Approach 1:
The system extracts only the necessary subset of emergency information for each mobile device based on its current geographic zone, rather than transmitting all possible emergency information to all devices. This reduces the data load on the network while maintaining comprehensive coverage.
Solution Approach 2:
Instead of broadcasting complete emergency information sets to all devices in a cell, the system transmits only the partial information relevant to each device's current zone, reducing overall network traffic while ensuring adequate information delivery.
3Device complexity
If a single cell area is used for emergency broadcasting, then the device complexity is reduced, but the measurement precision of location-specific information worsens
Solution Approach 1:
The system dynamically determines the mobile device's current geographic zone based on real-time location data and adjusts the emergency information delivered accordingly. This allows the simple cell broadcast structure to provide precise location-specific information without increasing system complexity.
Solution Approach 2:
The system uses feedback from the mobile device's location information to selectively deliver appropriate emergency information for the current geographic zone, achieving location precision within the simple cell broadcast framework.
Data Source
AI summary
A system and a method for receiving local emergency information on a mobile device in a system having a telecommunication network and at least one local communication network having one or more wireless access points. The mobile device receives a general emergency signal over a broadcast channel of the telecommunication network. In response to the general emergency signal, the mobile device connects to one of the wireless access points and transmits a request for transmitting the local emergency information to the mobile device. The mobile device then receives the local emergency information from one of the wireless access points.