Enhanced AODV (EN-AODV) in ad hoc networks

Abstract

A set of wireless nodes or routers coming together to form a network in which every node acts as a router can be defined as a mobile ad hoc network (MANET). Mobility causes a number of issues in ad hoc networks. To overcome this, routing protocols using various mobility metrics have been suggested. One such protocol is proposed in this thesis, whereby the most commonly used ad hoc on-demand distance vector (AODV) routing protocol is modified so that it uses the mobility metric “route lifetime” as a routing metric In addition, the route cache timeout or the route expiry timeout is set to the value of the route lifetime. To achieve this, the value of the route lifetime is calculated and then implemented appropriately in AODV. Simulations in the Global Mobile Information System Simulator (GloMoSim), a network protocol simulation software that simulates wireless and wired network systems, demonstrate an increase in packet delivery ratio and a decrease in mean end-to-end latency, in comparison to the AODV protocol. This is achieved with a slight increase in control overhead.