Door Intercom Sync Word Generation for Power and Resource Efficiency
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Solution Overview
Problem
In locator systems, the continuous transmission of a calling signal for an extended period increases power consumption, and simultaneous communication with multiple devices in systems like door intercoms restricts radio resource usage, leading to inefficiencies and increased power consumption.
Innovation Solution
A radio communication system where the control station determines a sync word and transmits a control signal, allowing the subsidiary station to synchronize and reduce retries, enabling efficient time-division multiplex communication with minimal interference from other devices, thus optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the locator continuously transmits the calling signal for an extended period to reduce power consumption, then power consumption is reduced, but radio resource usage efficiency deteriorates
Solution Approach 1:
The locator transmits the calling signal periodically at predetermined intervals rather than continuously, allowing the receiver to wake up at specific intervals to check for signals. This periodic transmission pattern reduces overall power consumption while maintaining communication effectiveness and radio resource efficiency.
2Adaptability or versatility
If multiple devices communicate simultaneously in a door intercom system, then system functionality is improved, but radio resource availability for each device deteriorates
Solution Approach 1:
The radio communication system divides time into discrete slots within frames, allocating specific time slots to different devices for transmission and reception. This time-division multiplexing approach allows multiple devices to communicate simultaneously without interfering with each other, maintaining system functionality while ensuring adequate radio resource availability for each device.
Data Source
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AI summary
A radio communication system is provided so as to achieve effective usage of a radio resource and reduce power consumption in devices operating on batteries. Door-intercom master unit 100 determines a sync word based on a master-unit identification code and transmits a control signal including the sync word to monitor terminal 200. When synchronization is established in notification of presence confirmation, monitor terminal 200 detects the sync word determined by door-intercom master unit 100 based on the master-unit identification code and establishes synchronization with door-intercom master unit 100.