Radio Repeater Channel Release via Signal Detection
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Solution Overview
Problem
Existing radio repeating systems occupy channels unnecessarily after communication is finished, preventing other terminals from using the system due to a lack of efficient mechanism to release the channel, and requiring complex operations with an end key.
Innovation Solution
A radio repeating system with a controller that uses timers to detect transmission modes and halt relay operations when a radio terminal is in a transmission halt mode, allowing for automatic release of the channel without additional functions on the radio terminal, utilizing a push-to-talk switch to manage transmission modes and halt relay operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio repeating apparatus continues relay transmission operation for a predetermined hold time after communication finishes, then the channel occupation is maintained for ongoing transmission, but other radio terminals cannot use the radio repeating apparatus
Solution Approach 1:
The radio repeating apparatus monitors transmission signals from radio terminals continuously. When no transmission signal is detected during the hold time, the system automatically determines that communication has finished and releases the channel occupation, enabling other terminals to use the system promptly
Solution Approach 2:
The system uses its own transmission signal detection capability to automatically manage channel release without requiring external end keys or additional terminal functions. The radio repeating apparatus itself detects when transmission stops and autonomously releases the channel
2Ease of operation
If an end key function is implemented in the radio terminal to transmit end commands, then the hold time can be finished and channel released, but the radio terminal cost increases and operations become complex
Solution Approach 1:
The radio repeating apparatus performs automatic channel release by detecting the absence of transmission signals itself, eliminating the need for end keys or special terminal functions. This transfers the intelligence from the terminal to the repeating apparatus
Solution Approach 2:
The end key function and channel release control logic are extracted from the radio terminal and relocated to the radio repeating apparatus. This removes the complexity burden from terminals while maintaining the desired channel management functionality
Data Source
AI summary
A radio repeating system has first and second radio terminals, a radio repeater to receive a signal transmitted from the first radio terminal and transmit the signal to the second radio terminal, and a controller to control the radio repeater. The controller has a terminal signal determiner to detect a signal from the first radio terminal to determine whether the first radio terminal is in a transmission halt mode or a transmission mode, a first counter to start counting when a result of detection is the transmission halt mode, and a second counter to start counting when a result of detection is the transmission mode. The controller halts a wireless relay operation of the radio repeater when the result of detection is the transmission halt mode while the second timer is operating, or when the first timer finishes counting.