Mobile Broadcasting Emergency Alert Table and Fast Information Channel
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Solution Overview
Problem
Current mobile broadcasting systems lack the capability to effectively provide emergency alert services, as they do not efficiently transmit disaster-related information to users based on their location during emergencies.
Innovation Solution
A method and apparatus for providing an emergency alert service in a mobile broadcasting system, which involves generating an RS frame through Reed-Solomon-CRC encoding, dividing it into portions, and including a mobile emergency alert table in the service signaling channel to transmit emergency alerts, along with a Fast Information Channel for wake-up functions and automatic tuning, ensuring timely and targeted alert dissemination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If emergency alert information is transmitted through existing mobile broadcasting channels, then the information can be delivered to mobile users, but the transmission speed and reliability are insufficient for emergency situations
Solution Approach 1:
The emergency alert information is segmented into multiple parts and transmitted through different channels (FIC for wake-up signals, service signaling channel for alert tables, data groups for detailed information). This segmentation allows parallel transmission paths, improving both speed and reliability by ensuring that if one channel fails, other channels can still deliver critical alert information to mobile users.
2Reliability
If the mobile broadcasting system uses complex encoding and signaling protocols to ensure reliable emergency alert transmission, then the reliability improves, but the system complexity increases
Solution Approach 1:
The patent reuses existing mobile broadcasting infrastructure components (FIC, service signaling channels, data groups, RS frames) for emergency alert transmission. By making these existing components multi-functional—capable of serving both regular broadcasting and emergency alert purposes—the system achieves high reliability without adding significant complexity. The same transmission channels and encoding mechanisms are utilized for dual purposes.
3Loss of information
If the system transmits detailed emergency alert information to all mobile users, then the completeness of information improves, but the bandwidth consumption and transmission time increase
Solution Approach 1:
The system transmits a condensed mobile emergency alert table containing essential alert information (alert ID, priority level, affected area, brief description) first through the service signaling channel. Detailed emergency alert information is then transmitted subsequently through data groups only to users who have indicated interest or are in affected areas. This preliminary action ensures critical information reaches all users quickly while minimizing bandwidth consumption for detailed information.
Data Source
AI summary
A method of processing an emergency alert in a broadcast receiver includes receiving a broadcast signal including an emergency alert table, the emergency alert table including an emergency alert text related to an emergency alert message, information for identifying a viewing target for the emergency alert message and emergency-related broadcast service information for an emergency-related broadcast service, decoding the emergency alert table, displaying the emergency alert text in the decoded emergency alert table, and displaying an additional content related to the emergency alert message. The broadcast signal further includes wake-up information that includes 2 bits representing at least a first wake-up notification of a first emergency or a second wake-up notification of a second emergency different from the first wake-up notification of the first emergency.