Wireless Communication Device Power Management Synchronization
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Solution Overview
Problem
Existing wireless communication devices face challenges in establishing synchronization quickly and efficiently, especially in home automation networks, due to power-off scenarios and increased power consumption during re-transmission control and data encryption, particularly when multiple sensors detect events simultaneously or experience interference.
Innovation Solution
A wireless communication device that includes a battery, first and second storage units, an event detection unit, and a control unit, which generates and transmits data packets with a wireless link request and packet number, and adjusts power supply to establish synchronization efficiently by changing frequencies and updating packet numbers, allowing immediate communication initiation and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power is cut off to reduce power consumption, then power consumption is reduced, but synchronization establishment time increases
Solution Approach 1:
The device stores packet numbers in first storage unit before power-off, and stores frequency information in second storage unit before power-off. This preliminary storage of critical communication parameters enables rapid resumption of communication without full re-initialization, resolving the contradiction between power-saving power-off and quick synchronization re-establishment
Solution Approach 2:
The control unit automatically retrieves stored packet numbers and frequency information from storage units when power is restored, and autonomously resumes packet transmission without requiring external intervention or complex re-synchronization procedures, achieving quick recovery while maintaining low power consumption operation
2Reliability
If packet re-transmission control is implemented for security, then security is improved, but power consumption increases
Solution Approach 1:
The device implements packet re-transmission control based on periodic acknowledgment checks, where the control unit determines whether to re-transmit packets based on received acknowledgments. This periodic control mechanism ensures security through proper re-transmission while avoiding continuous high-power operation, balancing security requirements with power consumption constraints
3Measurement precision
If frequency changing is performed for synchronization, then synchronization accuracy is improved, but communication delay increases
Solution Approach 1:
The second storage unit pre-stores frequency information that was used during previous successful communications. When power is restored or events occur, the control unit immediately retrieves and applies these pre-stored frequency values, avoiding the time-consuming process of frequency scanning and synchronization searching, thus achieving both accurate synchronization and minimal delay
Data Source
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AI summary
A wireless communication device for packet communication is provided. When a battery is mounted, a control signal for obtaining information necessary for packet communication is received, and the information is stored in a first communication information storage unit, along with a reception frequency of the control signal. In a waiting state, main components for wireless communication are powered off. The main components for the wireless communication are powered on at the time of sensor detection. The packet communication is performed using the information in the first communication information storage unit.