EXPERIMENTAL EVALUATION OF SINGLE PATH: INTRODUCTION

INTRODUCTION

Since the birth of the packet radio network (1970s) later widely known as Ad hoc network, research is going on to improve Wireless technology. The popularity has drawn the attention of researchers in doing research in most immerging research area as mobile wire-less ad hic network. The wireless technology can be mainly categorized into two. Infrastructure-less and Infrastructured wireless networks.

Infra structured networks are mainly known as single hop communication and they have fixed base stations connected to other through wired gateways and mobile node communicate through base stations,exchanges or gateways, fixed routers, etc. These networks are permanent network most of the time. GSM networks are example of this infrastructured wireless networks. Whereas in the infrastructure less networks, base stations, fixed routers are not required.They communicate within their radio range directly through the antenna. These networks are self configurable and temporary, most of the time. As this is known as mobile ad hoc networks.

The mobile as hoc network has more challenges to design and implement. They includes spectrum allocation and purchase, media access,routing, multicasting,energy efficiency, TCP performances, service locations,provision & access and security & privacy. In the absence of infrastructure, each node will be working as router. The existing routing protocols in MANET are many and among them the most widely used and popular in research community is the reactive routing protocol Ad hoc On demand Distance Vector routing protocol for single path and its multi path variant AOMDV. The AODV [2.3] is birthed from mainly two routing protocol DSDV and DSR. The good properties are taken from these two protocols. The sequence numbers from DSDV and on demand request of DSR made AODV most popular in industry and became accepted standard.

Till today many research has been done on the AODV protocol. But still this protocol is not without problems. Also as an energy constraint, how these two protocols ADOV and AOMDV do show their performance is also one view point. Keeping these in mind, in this paper, we did some experiments using NS2 simulator and evaluated the performance of routing protocols. This paper is organized in five sections. The first section covers the introduction whereas second section contains the conceptual comparison of AODV and AOMDV as single path and multipath routing protocol respectively. The third section contains the performance measures, fourth session contains the experimental evaluation and result and final section contains the conclusion and future work.