Emergency Message Transmission Prioritization
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Solution Overview
Problem
Emergency messages in two-way radio systems may not be received or retransmitted effectively due to empty or out-of-coverage talkgroup channels, and radios may not efficiently transmit to all available devices within their range.
Innovation Solution
A communication device with an electronic processor selects and prioritizes multiple communication channels and types based on the emergency type, controlling the transmission of emergency messages over these channels to ensure efficient retransmission across various networks and devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency messages are transmitted on a currently-selected talkgroup channel, then the transmission is simple and direct, but the message may not reach other radios if the channel is empty or radios are outside coverage area
Solution Approach 1:
The patent segments the transmission process into multiple stages: first attempting transmission on the currently-selected talkgroup channel, then escalating to alternative channels (service channels, rescue channels) if the initial transmission fails. This segmentation allows the system to maintain simplicity for normal operations while ensuring reliability through progressive escalation to more complex transmission paths.
Solution Approach 2:
The system performs preliminary actions by pre-configuring multiple alternative channels and transmission paths before an emergency message needs to be sent. When an emergency message is transmitted, the system has already prepared alternative routes (service channels, rescue channels) that can be activated if the primary channel is unavailable, eliminating the need for complex real-time decision-making.
2Reliability
If radios retransmit emergency messages efficiently to all available devices, then message distribution is comprehensive, but channel congestion may occur
Solution Approach 1:
The patent implements dynamic channel selection where radios adaptively choose transmission channels based on current channel conditions and availability. Instead of all radios transmitting simultaneously on the same channel (which causes congestion), the system dynamically assigns different channels (talkgroup channels, service channels, rescue channels) to different radios, optimizing message distribution while preventing channel overload.
Solution Approach 2:
The patent introduces channel assignment mechanisms and coordination protocols as intermediaries between emergency message sources and target devices. These intermediaries manage channel allocation, coordinate retransmission timing, and select appropriate transmission paths, thereby enabling comprehensive message distribution while preventing direct channel congestion that would occur with uncoordinated simultaneous transmissions.
Data Source
AI summary
A method and system for retransmitting an emergency message including receiving, at a communication device, the emergency message including a first identifier indicative of a communication type and a second identifier indicative of a type of emergency. An electronic processor of the communication device selects, for distribution of the emergency message, a plurality of communication channels and at least one communication type based on the second identifier. The electronic processor prioritizes the plurality of communication channels and the at least one communication type according to a transmission priority having a higher priority associated with at least one of the group consisting of the first identifier and the second identifier. Then, the electronic processor controls transmission of the emergency message according to the transmission priority over the plurality of communication channels and the at least one communication type.