QR Code Emergency Messaging via Public Broadcasting
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Solution Overview
Problem
During natural disasters, normal communication networks like mobile devices and landline phones often fail due to damage or power outages, leading to congestion issues in public broadcasting systems, making it difficult to exchange safety messages effectively.
Innovation Solution
A method and system that encodes messages using QR codes for visual display, allowing them to be read by devices like cameras and broadcasted through public broadcasting channels, with a broadcast center sorting and relaying messages on specific channels at designated times, enabling peer-to-peer communication even when traditional networks are down.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If public broadcasting systems are used for emergency communication, then message delivery is possible when traditional networks are down, but network congestion occurs limiting usefulness
Solution Approach 1:
The message is segmented into two distinct parts: an index message containing routing information (channel number, timing) broadcast on an index channel, and the actual message body broadcast on a designated message channel. This segmentation allows the index channel to remain lightweight and efficient while the message channel handles the actual content, preventing congestion on the primary communication path.
Solution Approach 2:
An index channel acts as an intermediary between the broadcast center and the message channel. Instead of broadcasting all messages directly on the message channel (causing congestion), the index channel provides routing information that guides receivers to the appropriate message channel at the appropriate time, efficiently mediating the message delivery process.
2Device complexity
If all messages are broadcast on the same channel, then message delivery is simple, but network congestion occurs and bandwidth is wasted
Solution Approach 1:
The broadcasting system is segmented into multiple functional channels: an index channel for routing information and separate message channels for content delivery. This segmentation allows efficient bandwidth utilization by directing different types of data to appropriate channels, preventing the congestion that would occur if all messages were broadcast on a single channel.
Solution Approach 2:
The system adds a temporal and spatial dimension to message broadcasting by using multiple channels and specific timing. Instead of a single-dimensional approach (one channel, continuous broadcast), messages are distributed across multiple channels at designated times, reducing congestion and improving overall system productivity.
3Ease of operation
If message routing information is included with every message, then direct delivery is possible, but message size and transmission overhead increase
Solution Approach 1:
The routing information (channel number, broadcast time) is extracted from the message body and placed in a separate index message. This extraction reduces the data volume of the actual message content while maintaining complete routing capability, as the index channel provides the necessary delivery information independently of the message body.
Solution Approach 2:
The routing information is provided in advance through the index channel before the actual message body is broadcast. This preliminary action allows receivers to prepare and tune to the correct channel at the correct time, eliminating the need to include routing overhead with every message transmission.
Data Source
AI summary
A method for emergency communication includes encoding a message for visual display including a message to field and a message from field. The visual display is revealed to a reading device in communication with a broadcast center, which stores the visual display. The messages are decoded and sorted from visual displays at the broadcast center. On an index channel, a time and channel number for when a message body of the message will be broadcast on a message channel is broadcasted. The message body is broadcasted on the message channel.