Sensing radius adjusting method and device of sensor node

Abstract

The invention discloses a sensing radius adjusting method and a sensing radius adjusting device of a sensor node, which are used for reducing the covering redundancy and improving the network resource utilization rate on the basis of guaranteeing the network covering performance of a wireless sensor. The method comprises the following steps: determining that a current sensing circle of the sensor node is at a fully-restrained state; determining the current sensing circle of each neighbor node; determining a crossed point set of the self current sensing circle of each neighbor node in the current sensing circle; if the number of crossed points in the crossed point set is zero, reducing the self current sensing radius to zero; otherwise, determining the crossed point which is covered by the current sensing circle of the each neighbor node for times no more than a pre-set value to be a blind zone vertex; covering a blind zone region formed by the blind zone vertex by reducing the self sensing radius; or selecting the neighbor node which meets a pre-set condition and indicating the selected neighbor node to cover the blind zone region through reducing the self current sensing radius.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for adjusting the sensing radius of a sensor node. Background technique [0002] At present, when deploying sensor nodes in wireless sensor networks, there are two deployment strategies: one is large-scale random deployment, that is, the deployment location of sensor nodes is randomly selected; the other is deployment at a designated location for a specific purpose sensor nodes. At present, most of them adopt random deployment strategy, and through large-scale and high-density deployment of sensor nodes, wireless sensor networks can achieve better coverage performance. Each sensor node can cover a circular area with the location of the sensor node as the center of the sensing circle and the current sensing radius as the radius. The circular area is also called the sensing circle of the sensor node. However, large-scale high-density random deployment is di...

AI Technical Summary

Problems solved by technology

However, large-scale high-density random deployment is difficult to deploy a large number of sensor nodes in suitable locations at one time, and it is easy to cause the distribution of nodes in the sensor network to be too dense or too sparse, thus forming overlapping areas of wireless sensor network coverage and coverage hole

Coverage overlappi

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