Adaptive Gateway Discovery in Hybrid MANETs
Alicia Triviño, Bernardo Ruiz-Villalobos, E. Casilari · 2007
Gateway Discovery in Internet-connected MANETs allows the stateless address configuration as well as the update of the routes to external hosts. Similar to conventional ad hoc route discovery, this procedure could be accomplished employing three different methodologies: proactive, reactive and hybrid. In proactive gateway discovery, MRA messages are periodically sent each TMRA interval. The election of TMRA greatly influences the network performance (a low TMRA could lead to unnecessary control packets meanwhile a high TMRA could make nodes keep invalid routes to external hosts). The appropriate selection of TMRA depends on the network conditions as the load, the node density or the node mobility. In order to automatically tune the TMRA interval, in this work we present an algorithm for adaptive Gateway Discovery under the proactive scheme. The method allows optimizing the trade-off between experimented quality metrics offered by a MANET and the overhead of the original proactive algorithm.