A Two Tier Data Aggregation and Clustering Scheme for Heterogeneous Sensor Networks

Wireless sensor networking is envisioned as an economically viable paradigm and a promising technology because of its ability to provide a variety of services, such as intrusion detection, weather monitoring, security, tactical surveillance, and disaster management. The services provided by wireless sensor networks (WSNs) are based on collaboration among small energy-constrained sensor nodes. The large deployment of WSNs and the need for energy efficient strategy necessitate efficient organization of the network topology for the purpose of balancing the load and prolonging the network lifetime. Clustering has been proven to provide the required scalability and prolong the network lifetime. Due to the bottle neck phenomena in WSNs, a sensor network loses its connectivity with the base station and the remaining energy resources of the functioning nodes are wasted. In this paper, a new hierarchical clustering scheme is proposed to prolong the network lifetime in heterogeneous wireless sensor networks. Finally, the simulation results shows that our proposed scheme is more effective in prolonging the network lifetime compared with LEACH.