Research On Low-power Node Of Wireless Sensor Network

Wireless sensor network is a non-fixed center of self-organizing network, the large number of its nodes, high density, and node energy resources and data processing resources are very limited, so the low-power design and research has a very important node significanceIn this word in this paper wireless sensor network composition and characteristics,analysis of the node energy consumption link, put forward various measures can be taken to low power consumption, mainly divided into two aspects of hardware and software.Hardware according to the functional requirements of the wireless sensor network node and on the composition of the various modules of the node, including: processor module,communication module, sensor module and power supply module for the analysis of energy consumption. Power loss nodes mainly in the processor and wireless transceiver module, so the hardware design is the choice of these two main modules.Comparative analysis of various kinds of chips, S3C6410 processor and CC2530 RF chip is selected as the node data processing and communication core; design scheme of each module is given circuit design communication module and processor module interface circuit. The nodes of the system can take a low-power software measures include using the timer interrupt enable nodes periodically enter sleep state, at the same time, the use of dynamic power management,introduced DVS(Dynamic Voltage Scaling) energy-saving technological transformation of the EDF(Earliest Deadline First) model, concentrated in the periodic task, according to the constraint relationship between task scheduling priority tasks according to the task attributes of the step-down task insert DVS operation, respectively for the entire task sets share a final deadline and tasks from different tasks there are different deadlines to draw different scheduling approaches.Also in accordance with the above design making the nodes and conducted a series of experiments, the node design has the characteristics of low power consumption, good stability,given the low energy consumption measures can prolong the lifetime of wireless sensor network node, to a great extent to meet the application needs.