Set-Top Box Multicast Emergency Alert Targeting
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Solution Overview
Problem
Existing systems for communicating emergency alerts through television networks face scalability issues due to the need for unicast connections, which require extensive resources and can result in non-relevant alerts being received by multiple viewers across large geographic areas.
Innovation Solution
A multicast-enabled system and method that uses a set-top box device and a multicast alert server to send emergency alerts based on location codes, ensuring that only relevant alerts are received by devices in specific geographic areas, utilizing an Internet Protocol Television (IPTV) system to efficiently communicate emergency alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If unicast connections are used to determine which viewers should receive emergency alerts, then alert targeting accuracy is improved, but network resource consumption increases and scalability deteriorates
Solution Approach 1:
The system segments the broadcast process by separating alert generation from alert distribution. The head-end generates alerts and segments them by geographic region, then distributes segmented alert streams to multiple broadcast channels simultaneously, allowing scalable one-to-many communication without requiring individual unicast connections to each viewer.
Solution Approach 2:
The system merges multiple alert streams into a single broadcast distribution infrastructure. By combining alert generation, geographic filtering, and multi-channel distribution into an integrated broadcast system, it achieves efficient resource utilization while maintaining the ability to target specific geographic areas through the broadcast infrastructure.
2Loss of information
If unicast connections are used to send emergency alerts to specific viewers, then alert relevance is improved, but network resource requirements increase
Solution Approach 1:
The system segments alert distribution by creating geographic region-based broadcast channels. Each channel carries alerts relevant to a specific geographic area, allowing the system to maintain high alert relevance for targeted regions while using efficient broadcast rather than unicast transmission, thereby reducing overall network resource consumption.
Solution Approach 2:
The system creates multiple copies of alert content and distributes them through broadcast channels segmented by geographic region. This copying approach allows the same alert content to be delivered to multiple viewers simultaneously through efficient broadcast mechanisms, reducing network resource usage compared to individual unicast transmissions while maintaining alert relevance through geographic filtering.
3Device complexity
If broadcast to all viewers in a television viewing area is used, then system simplicity is maintained, but alert precision deteriorates due to non-relevant alerts being received
Solution Approach 1:
The system segments the broad television viewing area into smaller geographic regions and creates separate broadcast channels for each region. This segmentation maintains relative system simplicity by using standard broadcast infrastructure while improving alert geographic precision, as each broadcast channel carries alerts only for its specific geographic region rather than broadcasting to all viewers universally.
Solution Approach 2:
The system applies local quality by tailoring alert content to specific geographic regions through dedicated broadcast channels. Each channel provides alert information with local quality appropriate to its geographic area, ensuring that viewers receive alerts relevant to their location while maintaining system simplicity through the use of conventional broadcast distribution mechanisms.
Data Source
AI summary
A set-top box device is disclosed. The set-top box device includes a processor and a memory device accessible to the processor. The memory device includes instructions to communicate with a multi-cast alert server to receive a multicast emergency alert message. The multicast emergency alert message includes data related to a location code and data related to a set-top box action. The memory device stores location information and includes instructions to execute the set-top box action when the location code matches the location information.