Energy-efficient networking method in heterogeneous sensor network

Abstract

The invention discloses an energy-efficient networking method in a heterogeneous sensor network, and belongs to the technical field of wireless sensor networks. According to the method, cluster head election is carried out based on neighbor information and residual energy Ei of each node, and the structure scale of a cluster is determined; a self-adaptive cluster scale networking mode based on energy efficiency is adopted. The physical radius of the cluster is reduced while the communication distance is met, so that the single-hop communication distance of the node is short and effective, andthe unreasonable situation that in probability election, the node capacity is not equal, but the opportunities are equal to that of selecting cluster heads is broken through by providing a cluster head election mechanism under the joint influence of energy and neighbors; a concept of adaptive value radius is introduced, and a cluster head communication distance is dynamically controlled to adjustthe structure and scale of the cluster; the communication cost between the cluster heads is calculated to serve as the basis of communication path selection, the utilization efficiency of node energyin the random heterogeneous sensor network is improved, and the effect of reducing communication energy consumption is achieved.

Description

technical field [0001] The invention relates to an energy-efficient networking method in a heterogeneous sensor network, and belongs to the technical field of wireless sensor networks. Background technique [0002] In the wireless sensor network WSN (Wireless Sensor Networks), because the wireless sensor node is a tiny device, it can only be equipped with a limited power supply. In some applications, it is almost impossible to replace the power supply. This makes the life of the sensor nodes largely depend on the life of the battery, and the node energy utilization efficiency of each sensor node directly affects the life cycle of the network. Since distributed node selection into clusters and standardized routing are more advantageous in network energy saving, the working mode of network clustering and step-by-step transmission is more suitable for WSNs powered by batteries. At present, the homogeneous networking algorithm is relatively mature, but in practical applications...

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Problems solved by technology

[0007] At present, the existing technologies to improve the energy utilization efficiency of nodes are mostly aimed at sensor networks with homogeneity or single-element heterogeneity. In actual network application scenarios, nodes present multi-element and randomized heterogeneity characteristics. In order to solve the problem that existing technologies cannot effectively For the problem of improving node energy utilization efficiency in a random multi-level heterogeneous sensor network, the present invention provides an energy-efficient networking method in a heterogeneous sensor network, the method includes the formation of a cluster structure and the formation of routing, The clustering structure includes the distinction between the cluster head node and the ordinary node and the reasonable adjustment of the size of the cluster through the fitness value radius; the formation of the route can obtain the routing information table of the global node;

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