Prolonging the network lifetime depends on efficient management of sensing node energy resource. Energy consumption is therefore one of the most crucial design issues in WSN. Hierarchical routing protocols are best known in regard to energy efficiency. By using a clustering technique hierarchical routing protocols greatly minimize energy consumed in… (More)
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The deployment of wireless sensor networks in many application areas requires self organization of the network nodes into clusters. The clustering Algorithm is a kind of key technique used to reduce energy consumption. Efficient way to enhance the lifetime of the system is to partition the network into distinct clusters with a high energy node as cluster… (More)
Coverage preservation and connectivity are the most essential functions to guarantee quality of service (QoS) in wireless sensor network. Therefore, the goal of an optimal sensor deployment strategy is to have a globally connected network, while optimizing coverage at the same time. By optimizing coverage, the deployment strategy would guarantee that… (More)
Wireless sensor networks are currently the greatest innovation in the field of telecommunications. WSNs have a wide range of potential applications, including security and surveillance, control, actuation and maintenance of complex systems and fine-grain monitoring of indoor and outdoor environments. However security is one of the major aspects of Wireless… (More)
The main contribution in this paper is to improve the weakness of cookies exchange in the handshake process in order to counter DoS attacks. The enhanced protocol is performed on Cooja simulator in Contiki operating system for the Internet of Things, and compared with the original DTLS. The simulation results lead to better performance of the proposed… (More)