Energy balancing by combinatorial optimization for wireless sensor networks

Authors:
J. Levendovszky;A. Bojárszky;B. Karlócai;A. Oláh
Affiliations:
Faculty of Information Technology, Pazmany Peter Catholic University, Budapest, Hungary;Faculty of Information Technology, Pazmany Peter Catholic University, Budapest, Hungary;Faculty of Information Technology, Pazmany Peter Catholic University, Budapest, Hungary;Faculty of Information Technology, Pazmany Peter Catholic University, Budapest, Hungary
Venue:
WSEAS TRANSACTIONS on COMMUNICATIONS
Year:
2008

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Abstract

In this paper novel protocols are developed for wireless sensor networks (WSNs) in order to ensure reliable packet transmission and maximize lifespan at the same time. The optimal transmission energies are derived which guarantee that the packets are received by the Base Station (BS) with a given reliability subject to achieving the longest possible lifespan. These protocols can be applied in biomedical applications where energy consumption and longevity is of crucial importance. The optimization has been carried out for the chain protocol (when nodes are forwarding the packets toward the BS via the neighbouring nodes) and for the shortcut type of protocols (when a packet may get to the BS by being first transferred in the chain up to a certain node which then sends it directly to the BS). The new results have been tested by extensive simulations which also demonstrated that the lifespan of WSN can significantly be increased by the new protocols.