Wireless Control Node Sleep Scheduling for Battery Life
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Solution Overview
Problem
Battery-powered wireless nodes in building control systems face challenges in energy conservation due to limited battery life and the need for efficient power management, as well as the requirement for adjustable communication frequency to balance energy consumption with responsive communication needs.
Innovation Solution
A battery-powered wireless control node with a processor and network communication device that periodically de-energizes and re-energizes its communication components to conserve energy, allowing for adjustable silent periods and increased communication frequency during desirable response times, using a method that includes predetermined intervals and event-driven continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the wireless communication radio is continuously enabled, then communication responsiveness is improved, but battery life deteriorates
Solution Approach 1:
The patent implements periodic action by enabling the wireless communication radio only at scheduled intervals rather than continuously. The node transitions between active communication periods and silent periods where the radio is deactivated, thereby reducing overall power consumption while maintaining necessary communication functionality.
Solution Approach 2:
The patent applies dynamics by making the communication frequency adjustable based on system needs. The node can dynamically switch between different operational modes including normal mode with periodic communication, fast response mode with increased communication frequency, and silent mode with minimal communication, allowing optimization between responsiveness and battery life.
2Productivity
If the communication frequency is increased, then system responsiveness is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of communication frequency based on operational requirements. The system can operate in normal mode with lower communication frequency to conserve energy, or switch to fast response mode with higher communication frequency when rapid system response is needed, thereby dynamically balancing productivity and energy consumption.
3Reliability
If the node remains in fast response mode continuously, then communication reliability is improved, but battery life deteriorates
Solution Approach 1:
The patent applies periodic action by implementing scheduled transitions between fast response mode and normal mode. Rather than maintaining fast response mode continuously, the node periodically switches between high-reliability communication periods and energy-saving periods, thereby maintaining adequate communication reliability while extending battery life through rhythmic operation patterns.
Data Source
AI summary
A battery powered wireless apparatus, method, and system. A battery powered wireless node operates to communicating with a gateway on a local area network through the network communication device, cease communication with the gateway after a predetermined period for a predetermined interval of time, and communicate with the gateway continuously when an event occurs.