Sensor Network Energy Control via Dynamic Transmission Adjustment
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Solution Overview
Problem
Wireless sensor networks face limitations in communication bandwidth and power energy, leading to high packet loss and reduced node lifespan due to inefficient energy consumption, especially when data transmission exceeds available bandwidth and power supply is limited.
Innovation Solution
A method and apparatus that acquire energy information from nodes in the network to adjust data transmission parameters, such as retransmission timeout and frequency, based on the energy status and available bandwidth, to optimize power usage and prolong network life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is increased to improve network communication effectiveness, then communication capacity is improved, but energy consumption increases and bandwidth limitations cause high packet loss
Solution Approach 1:
The patent dynamically adjusts data transmission parameters including sampling frequency, transmission interval, and packet size based on real-time energy status of sensor nodes. Nodes with sufficient energy transmit more frequently with larger packets, while energy-constrained nodes reduce transmission activity, creating a dynamic adaptation to energy conditions that optimizes both communication effectiveness and energy efficiency
Solution Approach 2:
The system changes transmission parameters such as sampling rate, transmission interval, and data packet size according to energy levels. When energy is abundant, parameters are adjusted to increase data transmission volume and frequency. When energy is limited, parameters are modified to reduce transmission activity, directly addressing the contradiction between communication effectiveness and energy consumption
2Measurement precision
If data transmission frequency is increased to improve monitoring accuracy, then measurement precision is improved, but node lifespan decreases due to higher energy consumption
Solution Approach 1:
The patent implements dynamic adjustment of sampling frequency and transmission interval based on energy status. Monitoring accuracy is maintained when energy is sufficient by using higher sampling rates, but when energy becomes limited, the system dynamically reduces sampling frequency while extending node lifespan through lower transmission activity, resolving the contradiction between measurement precision and duration of action
Solution Approach 2:
The system continuously monitors energy status of sensor nodes and uses this feedback to adjust transmission parameters. When energy levels drop below thresholds, the system reduces sampling frequency and transmission frequency, creating a feedback loop that preserves node lifespan while maintaining acceptable monitoring accuracy throughout the node's operational life
3Reliability
If retransmission attempts are increased to improve data transmission reliability, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent adjusts retransmission parameters including maximum retransmission attempts and retransmission interval based on energy status. When energy is abundant, the system allows more retransmission attempts to ensure high data reliability. When energy is limited, the system reduces retransmission attempts and increases intervals between attempts, balancing reliability requirements with energy conservation
Data Source
AI summary
A method and apparatus for controlling energy expended by sensor network nodes is disclosed. The method comprises steps of acquiring energy information that is indicative of an energy status of a node in the network and adjusting at least one data transmission parameter according to the energy information. In a wireless network where the communication capacity and power energy of sensor nodes are limited, the invention provides the capability of efficiently utilizing the network resources, conserving power consumption of sensor nodes, and prolonging the life of the sensor network.