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Fault-Tolerant and Energy-Efficient Generic Clustering Protocol for Hetero- geneous WSNs

In the context of Wireless Sensor Networks (WSNs), where sensors have limited energy power, it is necessary to carefully manage this scarce resource by saving communications. Clustering is considered as an effective scheme to increase the scalability and lifetime of wireless sensor networks. Moreover, failures and topological changes are inevitable in sensor networks due to the inhospitable environment, unattended deployment or nodes mobility. Therefore, one of the wanted properties of WSNs is the fault tolerance and adaptivity to topological changes. We propose a fault-tolerant and energy-efficient distributed selfstabilizing clustering protocol based on message-passing for heterogeneous wireless sensor networks. This protocol is adapted to topological changes, optimizes energy consumption and prolongs the network lifetime by minimizing the number of messages involved in the construction of clusters. Our generic clustering protocol can be easily used for constructing clusters according to multiple criteria in the election of cluster-heads, such as nodes’ identity, residual energy or degree. We propose to validate our approach under the different election metrics by evaluating its communication cost in terms of messages, energy consumption and number of clusters. Simulation results show that, in terms of of messages, energy consumption and clusters distribution, it is better to use the Highest-ID metric for electing CHs. Furthermore, after faults occurrence, the re-clustering cost is minimal compared to the clustering cost.

Auteur(s) : Mandicou Ba, Olivier Flauzac, Rafik Makhloufi, Florent Nolot et Ibrahima Niang,
Pages : 231 - 245
Année de publication : 2013
Revue : International Journal On Advances in Networks and Services
N° de volume : vol 6 no 3 & 4
Type : Article
Mise en ligne par : NIANG Ibrahima