Abstract
Optimizing and enhancing network lifetime with minimum energy consumption is the major challenge in field of wireless sensor networks. Existing techniques for optimizing network lifetime are based on exploiting node redundancy, adaptive radio transmission power and topology control. Topology control protocols have a significant impact on network lifetime, available energy and connectivity. In this paper we categorize sensor nodes as strong and weak nodes based on their residual energy as well as operational lifetime and propose a Maximizing Network lifetime Operator (MLTO) that defines cluster based topology control mechanism to enhance network lifetime while guarantying the minimum energy consumption and minimum delay. Extensive simulations in Java-Simulator (J-Sim) show that our proposed operator outperforms the existing protocols in terms of various performance metrics life network lifetime, average delay and minimizes energy utilization.
Highlights
Topology of a Wireless Sensor Network determines the connectivity of the wireless network and profoundly impacts the routing algorithms applied to the network
We evaluate the performance of Maximizing Network lifetime Operator (MLTO) with respect to performance metrics like network connectivity, energy consumption and network operational lifetime etc
From all of the above figures we see that the performance of MLTO and Conservation Protocol (CEC) are comparable in terms of performance metrics like network operation lifetime, average energy of the network etc., but MLTO outperforms CEC with respect to connectivity
Summary
Topology of a Wireless Sensor Network determines the connectivity of the wireless network and profoundly impacts the routing algorithms applied to the network. Like all other aspects of wireless sensor networks, topology control protocols have to be designed and implemented subject to a severe set of computational and energy constraints. Topology control protocols are designed to exploit node density in the network to extend the network lifetime and provide connectivity. The following criteria have been identified as the key concepts for designing topology control protocols for wireless sensor networks. Topology control protocols must ensure minimum connectivity in the network, so that the network is not partitioned. Topology control protocols should take advantage of the high node density in large-scale wireless sensor networks to reduce the energy dissipated in the network
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