Geo-Targeted Alert Messaging via Segmented Message Assembly
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Solution Overview
Problem
Conventional Wireless Emergency Alert (WEA) systems broadcast alert messages to devices within a wide area, including those outside the impacted region, leading to unnecessary message reception by devices not in the affected zone, and often exceed size limits defined by the Common Alert Protocol (CAP).
Innovation Solution
The system generates and transmits multiple messages with unique identifiers, where one message includes the geographic area information and another includes the message content, allowing user devices to compress and reassemble the data, ensuring messages are only displayed to devices within the specified geographic area, thus optimizing message size and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If alert messages are broadcast to all devices within cell tower range, then message delivery coverage is improved, but message relevance deteriorates (devices outside impacted area receive irrelevant messages)
Solution Approach 1:
The alert message is segmented into multiple parts: geographic area information, message content, and unique identifiers. Devices receive the complete message by assembling multiple broadcast segments, enabling precise geographic targeting while maintaining broad coverage. The message is divided such that only devices within the specified geographic area will have all necessary segments to reconstruct and display the alert.
Solution Approach 2:
A message assembly mechanism acts as an intermediary between broadcast transmission and device display. The system introduces unique identifiers and geographic area data as intermediate elements that devices must process to determine message relevance. This intermediary layer filters irrelevant messages from reaching the display stage, even though broad broadcast coverage is maintained.
2Measurement precision
If geographic area information is included in alert messages, then message targeting precision is improved, but message size deteriorates (exceeding CAP size limits)
Solution Approach 1:
The geographic area information is segmented and distributed across multiple message parts rather than included entirely in a single message. This segmentation allows precise geographic targeting data to be transmitted without exceeding the size limits of individual CAP-compliant messages, as the complete geographic information is reassembled from multiple smaller segments.
Solution Approach 2:
The solution moves geographic area information from a single-dimension constraint (one message size limit) to a multi-dimension approach (multiple messages that can be assembled). By distributing geographic data across multiple message dimensions, the system achieves high geographic precision while each individual message remains within CAP size limits.
3Length of moving object
If geographic area information is compressed to reduce message size, then message size is reduced, but data processing complexity deteriorates (compression and decompression operations)
Solution Approach 1:
The geographic area information is compressed and segmented into multiple parts distributed across different message segments. Devices perform compression and decompression operations on these segmented data parts, which reduces the processing burden compared to handling one large compressed data set. The segmentation allows incremental processing of geographic information.
4Measurement precision
If multiple message segments are transmitted to enable device-based geo-location filtering, then message targeting accuracy is improved, but system complexity deteriorates (message assembly and coordination)
Solution Approach 1:
The message assembly mechanism serves multiple functions: it coordinates receipt of segmented messages, assembles geographic area information, performs compression/decompression operations, and determines message relevance. This universal assembly process handles all complexity in one standardized procedure, reducing overall system complexity despite the multi-segment approach.
Data Source
AI summary
The disclosed systems, methods and apparatus enable alert messaging systems to send geographic location information with a geo-targeted message to end user wireless devices. The disclosed technology can be used to generate a plurality of messages where payload of a first message can include a message content, and where a payload of one or more additional messages can includes compressed location information. The user devices receiving the plurality of generated messages can process the compressed location information to determine whether the content of the received message should be displayed.