Local Route Repair in MANET for on Demand Routing Protocol: A Review

Ad hoc networks are the infrastructure-less wireless network in which there is no central access point. MANETs are the ad hoc networks in which nodes are mobile. Due to continuous mobility of nodes, topology is highly dynamic and unpredictable. Due to mobility of nodes probability of link failure is high as nodes can move away from the active path and remains no longer accessible. Local route repair is the mechanism that is used to repair the broken link by the upstream node on which the link is broken without notifying the source node. Local route repair is implemented on reactive routing protocol. . Reactive routing protocols are the routing protocol in which routes are established only when needed i.e. when there is communication between nodes. Local route repair decrease the routing overhead as the link is repaired quickly as compared to the source repair. Local route repair provides the scalability to the routing protocol. This paper presents some mechanisms that have been used to improve and optimize a local route repair on reactive routing protocol. AODV is used as the reactive routing protocol for the local route