Partial on demand cluster head replacement method for wireless sensor network clustered routing

Abstract

The present invention discloses a method for replacing partial required cluster-head of cluster-based routing of wireless sensor network. Through the method, the cluster-head replacing in the cluster-based hierarchy-type routing in the wireless sensor network can be realized. Furthermore the problems such as energy consumption of normal whole network cluster changing are reduced through the partial required cluster-head replacing. The technical scheme adopted by the invention is that the data package transmission of cluster-head is monitored all the time by the non-cluster-head node in the cluster thereby estimating the residual energy of the cluster head. An cluster application is initialized according to the magnitude relationship between the estimated cluster-head residual energy and the self energy of non-cluster-head node thereby realizing partial required cluster-head replacing. The cluster-head replacement according to the invention uses cluster as a unit. The conditions whether each cluster should replace the cluster, when to change the cluster and which new node is selected for the cluster head are all independent from each other, thereby reducing the energy consumption when the whole network is changed with cluster timely, and obtaining an energy equalization of the whole network.

Description

technical field [0001] The present invention relates to a cluster head replacement method applied in hierarchical cluster routing of wireless sensor network, more particularly, refers to a method capable of locally replacing cluster heads on demand. Background technique [0002] Wireless sensor network integrates sensor technology, embedded computing technology, distributed information processing technology and communication technology. Process, obtain detailed and accurate information, and transmit it to users who need it. Wireless sensor networks can enable people to obtain a large amount of detailed and reliable information at any time, place and under any environmental conditions. Therefore, this network system can be widely used in national defense, military, national security, environmental monitoring, traffic management, medical and health , manufacturing, anti-terrorism and disaster relief and other fields. [0003] The energy resources, computing power and bandwid...

AI Technical Summary

Problems solved by technology

Replacing cluster heads can balance network energy consumption, but for some areas where data is not frequently sent, it is not necessary to replace cluster heads regularly. At the same time, for many areas where data is frequently sent, the time interval for replacing cluster heads cannot be completely consistent. Therefore, it is unscientific to replace the cluster heads by regularly initiating the replacement of cluster heads in the entire network. On the one hand, the cluster replacement itself consumes a certain amount of energy, and inappropriate cluster replacement will actually lead to waste of energy consumption. On the other hand, Changing clusters in the entire network will temporarily block the entire network to enter the cluster changing mode, and give up data monitoring

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