Dual Power Mode Transceiver for Wireless Security Audio
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Solution Overview
Problem
Existing security and public address systems are costly and inefficient, particularly in large areas, due to high power consumption and frequent battery replacement of wireless sensors and annunciators, which affects network throughput and battery life.
Innovation Solution
The system employs a dual power mode transceiver with a low power mode for normal operation and a high power mode for streaming audio, using TDMA and CSMA/CA protocols respectively, along with a parent-child node relationship for data aggregation and redundancy, to optimize power usage and network throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless sensors and annunciators operate in high power mode continuously, then data transmission rate and audio streaming quality are improved, but battery life deteriorates
Solution Approach 1:
The system dynamically switches between low power mode and high power mode based on operational requirements. The transceiver operates in low power mode during normal sensor data transmission and switches to high power mode only when audio streaming is required, optimizing the balance between data transmission rate and battery life
Solution Approach 2:
The system uses periodic TDMA (Time Division Multiple Access) communication for sensor data transmission, where devices wake up at scheduled intervals to exchange data. This periodic operation allows the transceiver to remain in low power state between intervals, significantly extending battery life while maintaining necessary communication functionality
2Duration of action of moving object
If wireless sensors and annunciators operate in low power mode, then battery life is extended, but network throughput and audio streaming capability deteriorate
Solution Approach 1:
The system dynamically adjusts power mode based on real-time requirements. When audio streaming is detected or required, the transceiver switches from low power mode to high power mode, enabling full network throughput and audio streaming capability temporarily, then returns to low power mode afterward
Solution Approach 2:
The system performs power mode switching in advance based on predicted or detected audio streaming requirements. The transceiver transitions to high power mode before audio streaming begins to ensure immediate availability of full throughput, then switches back to low power mode after streaming completes
3Adaptability or versatility
If audio streaming is implemented over wireless network, then voice alarm and public announcement functionality are achieved, but power consumption increases
Solution Approach 1:
The transceiver dynamically switches power modes based on operational state. During normal sensor monitoring, it operates in low power mode. When audio streaming for voice alarm or public announcement is required, it transitions to high power mode to deliver the necessary audio quality, then returns to low power mode afterward
Solution Approach 2:
The system extracts audio streaming functionality as a separate, intermittent operation from continuous high power operation. Audio streaming is implemented only when specifically needed for voice alarms or public announcements, rather than being continuously active, thereby reducing overall power consumption while maintaining versatility
4Reliability
If frequent battery replacement is performed, then device reliability is maintained, but maintenance costs and system downtime increase
Solution Approach 1:
By implementing dynamic power mode switching between low power and high power modes, the system significantly extends battery operational life. This reduces the frequency of battery replacements required to maintain device reliability, thereby minimizing maintenance interruptions and system downtime
Solution Approach 2:
The system autonomously manages power consumption through intelligent mode switching based on operational requirements. This self-service power management extends battery life without requiring external intervention or frequent maintenance, allowing the system to maintain reliability while minimizing the time lost to battery replacement operations
Data Source
AI summary
An apparatus including an audio annunciator of a security system that protects a secured geographic area, a first wireless interface of the annunciator that wirelessly exchanges synchronization and channel maintenance messages with a control panel of the security system under a TDMA format and a second wireless interface of the annunciator that wirelessly exchanges alarm messages with the control panel of the security system through a second wireless interface under a CSMA/CA format, the second wireless interface being maintained in a deactivated state until an alarm message is detected from the control panel through the first wireless interface, the second interface being activated in response to the alarm message and wherein audio information is thereafter streamed from the control panel to the annunciator through the second wireless interface.