Authors: Barnabas Hegyi, Janos Levendovszky
Addresses: Faculty of Information Technology, Peter Pazmany Catholic University, 1083 Budapest Prater u. 50/a., Hungary. ' Faculty of Information Technology, Peter Pazmany Catholic University, 1083 Budapest Prater u. 50/a., Hungary; Department of Telecommunications, Budapest University of Technology and Economics, 1117 Budapest Magyar tudosok korutja 2., Hungary
Abstract: The paper is concerned with developing energy balancing cooperative diversity schemes for wireless sensor networks in a Rayleigh fading environment. In the network scenario we consider, the network is composed of a bottleneck node (BN) – for which energy consumption is of crucial importance – and a number of other less energy constrained nodes. Energy balance is maintained between the BN, i.e. the source and the rest of the network – the relays and the destination. The latter nodes are elected dynamically in a distributed fashion. In the paper, the optimal decision rules for the destination node as well as the corresponding bit error probability formulas are derived. Besides the theoretical analysis, the gain achieved by cooperative decision has also been evaluated by extensive simulations, which demonstrated that the lifetime of the BN can considerably be increased by the proposed energy-balancing, cooperative diversity scheme.
Keywords: wireless sensor networks; WSN; energy balancing; cooperative diversity; 2D Poisson distribution; optimal decision rule; Rayleigh fading; wireless networks; bit error probability; simulation; bottleneck nodes.
International Journal of Communication Networks and Distributed Systems, 2008 Vol.1 No.4/5/6, pp.524 - 543
Published online: 03 Nov 2008 *Full-text access for editors Access for subscribers Purchase this article Comment on this article