Abstract:

A wireless sensor network (WSN) consists of several sensor nodes, all of which are resource limited, and the energy consumption on every node has significant influence on the network. Clustering schemes can effectively control overall energy consumption. Based on the characteristics of the node status, the dynamic change of the event location at the actual running phase of the network, we propose a dynamic uneven clustering scheme with load balancing. The main idea is that the network completes uneven clustering using the OLEACH algorithm with self organization, and then a certain number of decision nodes from the cluster heads are selected dynamically for data aggregation. The role of decision nodes changes dynamically with the transformation of the event location and node state. Simulation results show that the scheme balances the energy consumption, improves transmission efficiently and prolongs the network life in comparison with the CAPNet scheme.

Key words: wireless sensor network;uneven clustering;dynamic;load balancing;decision nodes