Topology management method based on event-driven wireless sensor network

Abstract

The invention relates to a topology management method based on an event-driven wireless sensor network. The method comprises the following steps that when sensing that an event occurs, a node enters apre-activated state from a dormant state, and conducts first-stage redundancy determination according to the position of a neighbor node and a sensing range, the node determined to be redundant returns to the dormant state, and other nodes compete for a cluster head, and completes a clustering operation; the cluster head sends an activation signal to a relay node on a path according to a routingtable, meanwhile, member nodes in the cluster, before sending the sensing data to the cluster head, carryes out second-stage redundancy determination, the node determined to be redundant maintains a pre-activation state, and the other member nodes in the cluster send the sensing data to the cluster head; the cluster head carries out fusion processing on the sensing data and then transmits the sensing data to a base station according to the path in the routing table; and when a target moves to a cluster edge, a prediction clustering mechanism is triggered. According to the method, the high real-time performance and reliability of data can be ensured, and the network energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of event-driven wireless sensor networks, in particular to an event-driven wireless sensor network topology management method. Background technique [0002] With the advancement of manufacturing technology combining sensing technology and wireless communication technology, tiny sensor nodes can be densely deployed in required areas to form a large-scale wireless sensor network. The event-driven wireless sensor network has outstanding advantages in detecting emergencies, and can be widely used in many fields such as fire, earthquake, urban traffic, animal whereabouts, and space exploration. [0003] Specifically, the advantages of the event-driven network are: first, the sensor nodes can track and sense the target, so that the data has better fidelity; It is sent to the base station at a time, which has a high degree of real-time performance; thirdly, the sensor network adopts a discontinuous sensing method,...

AI Technical Summary

Problems solved by technology

This kind of method will cause unnecessary cluster communication overhead in most of the clusters where no events occur, resulting in unnecessary energy consumption and shortening the network life.

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