Wireless sensor network routing protocol based on improved tree clustering

Abstract

The invention provides a wireless sensor network routing protocol based on improved tree clustering; in a wireless sensor network, a cluster head is elected out and clustered; a tree structure is constructed in the cluster; with the cluster head as a root node, each sensor node in the cluster directly communicates with the cluster head if being close to the cluster head; otherwise, other sensor node relatively close to the cluster head is selected to communicate with the cluster head; with the cluster head closest to an aggregation node as the root node, all cluster heads form a tree, and theroot node directly communicates with the movable aggregation node; after every sensor node is elected out to be the cluster head for one time, a new round of clustering is started for the whole network; and residual energy of the sensor nodes is considered when electing the cluster head. According to the routing protocol, the sensor nodes are prevented from premature death, and the service life ofthe wireless sensor network is prolonged.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and in particular relates to a method for transmitting data in a wireless sensor network. Background technique [0002] A wireless sensor network is a low-cost, highly adaptive wireless network composed of a large number of tiny sensor nodes in a self-organizing manner. It can quickly and accurately sense and collect key information of the target area, such as the perception of temperature and smoke in forest fire monitoring, and the detection of temperature, humidity and air pressure in environmental monitoring. However, due to the limitation of the cost and size of wireless sensor nodes, the communication, computing and storage capabilities of the nodes are limited. The most prominent one is that the battery energy is very limited, and the sensor nodes are easy to die early, which leads to the failure of the wireless sensor network and causes great difficulties to the applicat...

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Problems solved by technology

However, it assumes that all nodes can communicate with the sink node, and the cluster head node far away from the sink node will cause the energy consumption of the cluster head node to die prematurely due to high-power communication, which will affect the use of the sensor network. life

In the single-hop routing protocol of the mobile sink node, the sink node can move to the vicinity of the cluster head for single-hop communication, and reduce the energy consumption during data transmission through short-distance communication to achieve the purpose of saving energy, but this transmission method requires the sink node Visiting all clusters one by one takes a long time and causes a large delay

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