Loop-free link stability metrics for proactive routing in wireless ad hoc networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Traffic engineering with traditional IP routing protocols
IEEE Communications Magazine
Managing routing disruptions in Internet service provider networks
IEEE Communications Magazine
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Thanks to the advances in wireless technology, Wireless Mesh Networks are becoming more and more widespread. Their application and deployment range from Internet access, e.g., Wireless Internet Service Providers using such a technology to provide Internet connectivity, up to crisis scenarios, e.g., public safety entities temporarily concentrated in small areas. So far, research work has focused mostly on routing and mobility management, resulting in a plethora of solutions able to cope with link instabilities and node movements. However, at the best of our knowledge, no research has been carried out in order to provide nodes with the possibility to gracefully leave a wireless mesh network without causing instabilities, routing loops, and packet drops. Common practice is to have a reactive approach, where the nodes leave the network by an abrupt shutdown, to which the network will then react. In this paper, we take a different angle, presenting a proactive technique, based on routing metric increments, to gracefully shutdown nodes before they actually leave the network. The results presented in the paper are encouraging and clearly show that such a technique helps in preventing routing loops and strongly reduces, sometimes even eliminating, packet loss, providing increased reliability.