Optimal restoration approach to handle multiple actors failure in wireless sensor and actor networks

The connectivity of actor network is vital in the wireless sensor and actor networks because the actors need to perform tasks collaboratively. Relocating actors is an effective solution to restore the connectivity when actors fail. Recent studies proposed relocation solutions which do not optimise the relocation distance. In this study, the authors present a network flow-based multi-objects non-linear mathematical programming model to handle the multiple actors failure. Minimising the total relocation distance and the individual relocation distance are two optimal objects. The model views the actor network as a transportation network and uses the flow balancing condition to reconstruct the connectivity of the network. The simulation results confirm the effectiveness of our model and show that the author´s model outperforms other existed approaches in terms of optimal relocation distance in handling multiple failures.