An Enhanced Dsr Protocol Using Path Ranking Technique

Mobile Adhoc networks are infra structure-less and are categorized by multi-hop wireless connectivity and dynamic changing network topology. They are self organized networks without dependency on any fixed infrastructure. Application area of MANET is varied, ranging from small, static networks to large scale highly mobile and highly dynamic networks. Routing is an important issue in wireless adhoc networks. Routing protocols plays a very important role because MANET use dynamic changing network topology. Most famous categories are Proactive, Reactive and Hybrid. Proactive routing protocols setup route based on continuous control traffic information. All routes and maintained all the times. On the other hand Reactive routing protocols does not take any initiative for finding routes. It establishes routes ‘on demand’ basis. Hybrid protocol have the advantages of both proactive and reactive protocol. In this paper, an attempt has been made to compare performance of ZRP (hybrid), DSDV (Proactive) and reactive (DSR and modified DSR) on the basis of their performance in MANETs using NS2 simulator. A comparative study on reactive and proactive has been done by some modification that how DSR can be modified for its performance enhancement from average to something extra to make MANETs more reliable. To achieve this goal DSR is modified by using route ranking technique in order to load balancing, to avoid congestion and lower packet delivery.