Design and analysis of hybrid on-demand multipath routing protocol with multimedia application on MANETs

AODV and DSR are the two most widely studied on-demand ad hoc routing protocols because of their low routing overheads. However, previous studies have identified various limitations of these protocols. For example, whenever a link break occurs on the active route, they must both invoke a route discovery process. In general, on-demand protocols use query floods to discover routes. Such floods consume a substantial portion of the network bandwidth. To alleviate these problems, this study proposed an On-demand Hybrid Multipath Routing (OHMR) which extends AODV by equipping it with the capability to discover multiple routing paths. OHMR features two novel characteristics; it establishes multiple node-disjointed and braided routing paths between a source- destination pair and it reduces the frequency of route discoveries. The present results demonstrate that OHMR for multimedia communication can improve the performance of the fraction of decodable frames and achieve better performance in terms of video quality than the traditional node-disjoint multipath.