Dynamic Wireless Emergency Alert Message Formatting
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Solution Overview
Problem
The Wireless Emergency Alert (WEA) system faces limitations due to bandwidth constraints and mobile device capabilities, restricting WEA message size to 90 characters, which hinders the ability to convey detailed information during emergencies.
Innovation Solution
A method that assesses network capacity using current and historical analytic information to determine if a WEA message can deviate from the default format, allowing additional or alternative information to be included if network capacity will not be exceeded, such as providing more detailed instructions or media links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the WEA message size is increased to provide more detailed information, then the information completeness is improved, but the network capacity is exceeded causing overload
Solution Approach 1:
The system dynamically adjusts the WEA message format based on real-time network conditions. When network capacity is sufficient, the system transmits extended format messages with more detailed information. When network capacity is limited, the system automatically switches to the default 90-character format, ensuring network reliability while maximizing information delivery when possible.
Solution Approach 2:
The patent changes the message format parameter from a fixed 90-character limit to a variable format that can be either the default 90-character format or an extended format with additional information elements. This parameter change allows the system to adapt message size based on network conditions, resolving the contradiction between information completeness and network capacity.
2Loss of information
If the WEA message format is extended beyond 90 characters, then the message detail is improved, but the device complexity increases
Solution Approach 1:
The extended WEA message format is segmented into distinct information elements including event type, area affected, recommended action, expiration time, and sending agency. This segmentation allows the system to organize complex information in a structured manner that is easier to process and transmit, reducing the effective complexity despite the increased message size.
Solution Approach 2:
The system maintains compatibility with both the default 90-character format and the extended format, allowing the same WEA infrastructure to handle multiple message types. This multi-functionality enables gradual adoption and ensures that devices can process messages in the format they support, reducing the burden of complexity while still enabling enhanced information delivery.
3Loss of information
If the WEA message includes additional information elements, then the alert usefulness is improved, but the transmission bandwidth is exceeded
Solution Approach 1:
The system performs preliminary assessment of network capacity before transmitting extended WEA messages. By evaluating current network conditions in advance, the system can determine whether the additional bandwidth required for extended messages is available, preventing network overload while maximizing the delivery of useful alert information when conditions permit.
Data Source
AI summary
A method, computer-readable medium, and apparatus for broadcasting a wireless emergency alert message are disclosed. For example, a method may include a processor receiving a request to broadcast a wireless emergency alert message, determining an anticipated increase in a network usage in response to broadcasting the wireless emergency alert message, determining that a capacity of the network will not be exceeded with the anticipated increase in the network usage, and broadcasting the wireless alert message in an alert area. In one example, the request comprises a type of alert, the alert area, and a message content. In one example, the wireless emergency alert message that is broadcast includes the message content in a format that deviates from a default format when it is determined that the capacity of the network will not be exceeded with the anticipated increase in the network usage.