Wireless Relay Channel Switching for Priority Call Handling
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Solution Overview
Problem
In hierarchical organizational structures, wireless terminal devices at lower hierarchies cannot be communicated with or perform simultaneous multicasting when those at higher hierarchies attempt to call them, especially in systems without dedicated control channels, leading to missed important communications due to channel conflicts.
Innovation Solution
A wireless communication system that allows wireless terminal devices to select relay devices and acquire information about other relay devices' status and priority levels, enabling channel switching when a higher priority call is detected, ensuring communications can be routed through alternative channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless terminal device communicates through a communication channel of a relay device, then communication is established, but when another wireless terminal device at higher hierarchy attempts to call those devices, the call cannot be made through another channel due to channel conflicts
Solution Approach 1:
The system dynamically switches communication channels based on priority levels. When a higher-priority call is detected, the wireless terminal device transitions from the current communication channel to an alternative channel, allowing simultaneous handling of multiple communications with different priority levels without channel conflicts
Solution Approach 2:
The communication system segments channels by priority levels, allowing different priority communications to occur simultaneously on different channels. This segmentation enables higher-priority calls to be routed through alternative channels while lower-priority communications continue on original channels
2Device complexity
If wireless terminal devices use a distributed trunking system without dedicated control channels, then system complexity is reduced, but wireless terminal devices cannot respond to higher-priority calls when communicating through channels other than home repeater channels
Solution Approach 1:
The system performs preliminary actions by notifying wireless terminal devices of higher-priority calls through the communication channel currently in use. Instead of requiring devices to monitor separate control channels, priority call information is proactively delivered through existing communication paths, ensuring timely response without adding system complexity
Solution Approach 2:
Communication channels serve multiple functions: they are used for both normal communication and for notifying priority calls. This multi-functionality eliminates the need for dedicated control channels while maintaining the ability to respond to higher-priority communications
3Productivity
If wireless terminal devices at lower hierarchy communicate with each other through a relay device channel, then communication is established, but simultaneous multicasting communication from higher hierarchy cannot be performed
Solution Approach 1:
The system dynamically allocates communication channels based on the type of communication required. When simultaneous multicasting is needed, the system switches from using a single relay device channel to utilizing alternative channels, enabling flexible adaptation between point-to-point communication and multicasting scenarios
Data Source
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AI summary
There is provided a wireless communication system which causes a wireless terminal to select a relay device among plural relay devices connected together via a communication line when the wireless terminal attempts to communicate with another wireless terminal. The relay device has an information acquiring unit, a calling determining unit, and an information adding unit. The wireless terminal has an information analyzing unit which analyzes whether or not the own device is included in a communication counterparty of calling information when the calling information is included in communication information, a priority comparing unit which determines whether or not a priority level of the calling information is higher than that of a current communication when the own device is included, and a channel changing unit which changes a channel to that of another relay device of the calling information when the priority level of the calling information is higher.