Combating Routing Microholes in Hybrid Wireless Sensor Networks

摘要

In this paper we propose a new technique for dealing with routing holes found in Wireless Sensor Networks (WSNs) with the help of mobile sensor nodes that are deployed alongside the static nodes. In a nutshell, our technique in volves using mobile nodes in order to bridge the gaps cre ated by routing holes, shortening the average hop distance of routing paths, and thereby leading to significant energy gains. We also introduce a new routing anomaly which we term the microhole. Microholes are very small imperfec tions in the routing path and are not classified as routing holes by the traditional routing hole definition. We evaluate our approach with respect to microholes while using energy as the primary metric and show that our approach can pro vide a reduction in energy consumption in certain WSNs deployment scenarios. Based on our finding, we propose DARMA - an algorithm for combating microholes.