Research Article Open Access

Energy-Efficient Topology Control with Selective Diversity in Cooperative Wireless Ad Hoc Networks: An Overview

Abstract

The Cooperative Communication is a technology that allows multiple nodes to simultaneously transmit thesame data. It can save power and extend transmission coverage. However, prior research work on topology controlconsiders CC only in the aspect of energy saving, not that of coverage extension. We identify the challenges in thedevelopment of a centralized topology control scheme, named Cooperative Bridges, which reduces transmission power ofnodes as well as increases network connectivity. Prior research on topology control with CC only focuses on maintainingthe network connectivity, minimizing the transmission power of each node, whereas ignores the energy efficiency of paths inconstructed topologies. This may cause inefficient routes and hurt the overall network performance in cooperative ad hocnetworks. we propose a distributed energy-efficient selective diversity(EESD) topology control to improve energy efficiency in thenetwork, which jointly considers network capacity and energyconsumption in terms of bits per Joule. EESD forms transmissioncoalitions via cooperative manner (i.e, diversity) selections, bytaking into account the cost of channel information exchange.We then formulate EESD as a coalition game and propose anadaptive coalition formation algorithm for EESD with proved convergence property and stable coalition structures. Simulationresults show the performance improvement of EESD in energyefficiency compared to the existing topology control system.

Pallavi S. Donadkar, Prof. R. B. Singh.

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