Wireless Sensor Retransmission Timing for Battery-Saving Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless sensors with two-way communication capabilities face reduced battery life due to frequent retransmissions of acknowledgement messages, which is not addressed by existing technologies.
Innovation Solution
Implementing a wireless sensor with a detector, memory, and a mesh-network transceiver that generates encrypted frames with both encrypted and unencrypted identifiers, waits for acknowledgements and responses, and retransmits only if not received within configurable times, using the Z-Wave 700 series protocol to optimize battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor uses frequent retransmissions of acknowledgement messages to ensure delivery, then message delivery reliability is improved, but battery life is reduced
Solution Approach 1:
The sensor performs preliminary actions by setting configurable timeout periods before transmitting messages. The system pre-establishes timing parameters that determine when retransmission occurs, allowing the sensor to wait for acknowledgements within controlled time windows rather than continuously retransmitting, thus extending battery life while maintaining reliability.
Solution Approach 2:
The system dynamically adjusts transmission behavior based on timeout conditions. When the acknowledgement is not received within the configured time period, the system activates retransmission logic. This dynamic response ensures reliable delivery only when necessary, avoiding unnecessary retransmissions that would consume battery power.
2Reliability
If the sensor implements two-way communication with receiver and transmitter, then message delivery reliability is improved, but power consumption increases
Solution Approach 1:
The sensor employs periodic action by using configurable timeout intervals to determine when to check for acknowledgements and initiate retransmissions. Instead of continuous monitoring or constant power consumption, the system checks for delivery status at periodic intervals defined by the timeout parameter, significantly reducing average power consumption while maintaining reliable communication.
3Duration of action of moving object
If the sensor uses configurable timeout periods for retransmission, then battery life is extended, but message delivery timing flexibility is reduced
Solution Approach 1:
The system addresses this contradiction by allowing parameter changes through configurable timeout periods. The timeout duration can be adjusted based on network conditions, message priority, and operational requirements. This flexibility in parameter configuration enables the system to adapt timing behavior to different scenarios while maintaining extended battery life through controlled retransmission windows.
Data Source
AI summary
Methods and apparatus are described for transmitting messages by sensors in a system, such as a home security system. The messages are deemed received only when a sensor receives both an acknowledgement and a response from a central controller, and retransmissions occur when either an acknowledgement or a response is not received.