Connectivity Restoration in Multi-Channel Wireless Sensor Networks

Fault tolerance is one of the most important requirements in the Wireless Sensors Networks (WSNs). In fact, the performance and the reliability of a RCSF degrade because of several factors. On one hand, the interferences between simultaneous transmissions generate infinite phenomena of collision / retransmission. On the other hand, the failure of some components of the network may introduce the failure of the whole network. In this fact, the integration of the mechanisms which prevent or reduce the impacts of these two problems (interferences and failures) becomes an obligation. In this work, we propose the Connectivity Restoration for wireless sensor networks in Routing based Multi-Channel Context approach (CR-RMC) to improve the WSN reliability. This solution uses multi-channel communications to reduce the interference ratio, as well as network reorganization to recover from a critical node and restore the connectivity. We evaluate the obtained results regarding the fixed objectives.