Wireless Sensor Node Data Buffering for Lossless Transmission
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Solution Overview
Problem
Current wireless sensor networks experience data loss due to limitations in energy sources and network size, making it impractical to implement expensive data buffers and retransmission methods, which is critical for applications requiring continuous data collection and condition-based sensing.
Innovation Solution
The implementation of a method that attaches timestamps to sensor data, buffers it in memory, and uses acknowledgement messages and retransmission to ensure lossless data transmission, with the base station sending data packets and acknowledgments, and dynamically adjusting bandwidth and transmission power to minimize data drop rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data buffers and retransmission methods are implemented to prevent data loss, then data transmission reliability is improved, but system cost and complexity increase
Solution Approach 1:
The patent implements preliminary action by having sensor nodes buffer data locally in memory before transmission occurs. This pre-buffering approach ensures data is ready for immediate transmission when the channel is available, preventing data loss without requiring complex retransmission protocols. The base station also maintains a buffer to receive and store data from multiple nodes, coordinating transmissions to avoid collisions and ensure reliable delivery.
Solution Approach 2:
The patent introduces buffers as intermediary storage elements between sensor nodes and the base station. These buffers act as mediators that temporarily hold data, allowing for coordinated transmission scheduling and preventing data loss due to channel conflicts or transmission failures. The buffer serves as an intermediary that decouples the data generation rate from the transmission rate, ensuring reliable delivery without complex retransmission mechanisms.
2Reliability
If data buffers are implemented to prevent data loss, then data transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-buffering data in low-power memory structures before transmission. This allows sensor nodes to accumulate data locally without requiring continuous high-power transmission, enabling them to transmit in efficient bursts when the channel is available. The base station buffer similarly pre-receives and stores data, reducing the need for energy-intensive retransmission operations.
3Reliability
If retransmission methods are used to ensure lossless data transmission, then data integrity is improved, but transmission time increases
Solution Approach 1:
The patent implements preliminary action through pre-buffering at both sensor nodes and the base station. This ensures that data is already prepared and stored in memory before transmission is attempted, eliminating delays associated with data preparation during retransmission. The coordinated buffering approach allows for efficient single-transmission delivery, preventing the need for time-consuming retransmission cycles.
Data Source
AI summary
Systems, methods, and computer readable media for providing lossless transmission of sensor data in a wireless network are provided. In some aspects, a method for transmitting data in a wireless sensor network includes collecting data at a sensor node, attaching a timestamp to the data, buffering the data and the timestamp to a memory device and retransmitting the collected data where the sensor node fails to receive an acknowledgement message from the base station after the data transmission. In some aspects, a system can include a plurality of wireless sensor nodes having synchronized clocks and a base station. Collected sensor data can be associated with a timestamp via the clock prior to transmitting the data to the base station. The data can be buffered at a memory device and retransmitted therefrom to provide lossless data transmission.