A fault-tolerant routing mechanism is a robust technique that allows routing protocols to react to failures that might occur in the network. Most importantly, they allow the network to continue to operate as expected without failures. Wireless sensor networks (WSNs) are by nature prone to failures because they are usually deployed in harsh environment. In this paper, we propose a dynamic fault-tolerant routing (DFTR) protocol for convergecast WSNs that is able to cope with random node failures with very little impacting on the overall network performances. DFTR is based on a combination of 2 routing metrics which are the access delay and the expected number of transmissions and the use of load balancing and queue overflow avoidance techniques. We also emphasize on the fact that fault-tolerant protocols should perform well in scenarios without failures and not only in the presence of failures. We evaluated our proposal using Cooja simulator and compared it to other fault-tolerant techniques inspired from the literature. Results show that DFTR support node failures very well in the studied scenarios with very little impact on the network performances.
DFTR: Dynamic Fault-Tolerant Routing Protocol for Convergecast WSNs
2017-09-01
354791 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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