Method and system for enquiring data of sensor network and sensor node

Abstract

The provided data inquiry method in sensor network comprises: determining the energy message for every sensor node in the network, and selecting the node with the maximal residual energy as the cluster center, as well as the sensor node for non-cluster center; the non-cluster center sensor sends self-collected data to corresponding cluster center, and enters sleeping state; the cluster node receives inquiry request and obtains the objective data for report. This invention reduces total energy consumption and improves service time of the sensor network.

Description

technical field [0001] The invention relates to sensor network technology, in particular to a data query method and system of the sensor network and sensor nodes. Background technique [0002] A sensor network is a network formed by a plurality of scattered sensor nodes connected through wireless communication. In the sensor network, each sensor node collects data from the environment in order to monitor the environment in real time. The data query for environmental monitoring mainly adopts a top-down method that consumes less transmission bandwidth and energy, that is, the system central node sends query information to the sensor node at the corresponding location according to the processing needs, and the sensor node feeds back the query result to the system central node . [0003] Due to the arrangement of sensor nodes and the limitations of the application environment, it is not easy to replace the battery frequently. Therefore, it is very important to save the energy ...

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Problems solved by technology

[0012] This method uses reasoning to enable the system to query the environmental data of any position in the monitoring area, and at the same time, it can make some sensor nodes sleep, thereby reducing the total energy consumption. However, the sensor central node set by this method will also consume more energy than other sensors. The node has more energy, the energy of the sensor central node will be consumed quickly, and the imbalance of energy consumption among sensor nodes will also reduce the life of the sensor network

[0013] It can be seen from the above that there is no reasonable method in the prior art that can balance the energy consumption between sensor nodes on the basis of reducing the total energy consumption of the sensor network, thereby prolonging the life of the sensor network

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