Fault tolerant placement strategy for WSN

In this paper, we introduce a new fault tolerant initial deployment schema. We aim at maximizing WSN lifetime by considering the energy consumption of nodes led by their communication activities. We defined a circular multi-layer model in which a number of nodes are placed in each layer with regards to the overall energy consumption. To that end, we define first a simple worst case model for nodes energy consumption taking into account their involvement in the routing function. From this model, we derive the optimal number of nodes that should be placed in every layer of the network to achieve energy consumption balancing among all layers. Extensive simulations show that the proposed deployment scheme outperforms random and uniform grid deployment models in terms of connectivity, network lifetime and energy consumption.