Node sleep scheduling method and system comprehensively considering network coverage and energy efficiency

Abstract

The invention discloses a node sleep scheduling method and system comprehensively considering network coverage and energy efficiency, and the method comprises the steps that: the own scheduling priority of a node is calculated through the network coverage and residual energy, and a message containing the scheduling priority in a neighbor node set is transmitted and received; any node si divides neighbor nodes of the node si into two groups of nodes of an LSN and an HSN; firstly, a node si judges whether the coverage rate of neighbor nodes in an LSN group to the node si meets a threshold value theta or not; if yes, the node si broadcasts sleep message and enters a dormant state; otherwise, the node si randomly waits for a period of time and monitors the active message sent by the neighbor node in the HSN group; then, the node si continuously judges whether the coverage rates of the neighbor nodes in the LSN group and the neighbor nodes in the working state in the HSN group on the node si meet a threshold value theta or not; if yes, the node si broadcasts sleep message and enters a dormant state; and otherwise, the node si broadcasts the active message and enters a working state.

Description

technical field [0001] The invention relates to a node dormancy scheduling method and system that comprehensively considers network coverage and energy efficiency, is used in wireless sensor networks, and belongs to the technical field of wireless sensor networks. Background technique [0002] As one of the key supporting technologies for the Internet of Things and smart society, Wireless Sensor Network (WSN) has been widely deployed and applied. Wireless sensor network is a self-organizing network composed of a large number of sensor nodes deployed in the target monitoring area, which can intelligently perceive, collect and process the information in the coverage area. With the increase of network scale and business volume, energy consumption has become one of the important bottlenecks that seriously restrict the full use of wireless sensor networks. On the one hand, reducing energy consumption can prolong the lifetime of the network; on the other hand, reducing energy con...

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Problems solved by technology

[0006] Purpose of the invention: Aiming at problems such as unreasonable network topology, excessive redundant data, and unbalanced energy usage of nodes caused by random deployment of large-scale wireless sensor networks, the present invention provides a wireless sensor network that comprehensively considers network coverage and energy efficiency. The node dormancy scheduling method and system based on the priority-based distributed node dormancy scheduling method, by comprehensively considering the network coverage and the remaining energy of the nodes to construct the priority of the node for dormancy decision-making, can reasonably organize the nodes in the wireless sensor network The working status and tasks undertaken effectively reduce the problem of network boundary effects, balance the energy consumption of network nodes, and significantly extend the network service time

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