International Journal of Computer Applications (0975 – 8887) Volume 90 – No 12, March 2014 7 Applicability of DSDV and DSR Routing Protocol for MANET with Mobile Gateway Abu Bony Amin Department of Electrical & Electronic Engineering, Chittagong University of Engineering and Technology (CUET), Chittagong-4349, Bangladesh Choton Kanti Das Department of Electrical & Electronic Engineering, Chittagong University of Engineering and Technology (CUET), Chittagong-4349, Bangladesh ABSTRACT In this technological era mobile communication among air transportation is increasing day by day. Maintaining seamless communication by avoiding congestion in a cost effective way is a future challenge. This future challenge can be met by developing solutions for an aeronautical air-ground communication network based on internet technologies. This is done by developing Mobile Ad hoc Network (MANET). Mobile Ad hoc networks (MANETs) are infrastructure-less dynamic networks allowing mobile nodes to communicate beyond transmission range. Nodes in a MANET that connect it to the Internet are called Internet gateways. This research will present a new paradigm for aeronautical communication in air to ground and air to air at future with mobile gateway. Most of the previous researches on MANET were focused on static gateway. In this paper two routing protocols DSDV (Destination Sequenced Distance Vector) and DSR (Dynamic Source Routing Protocol) are considered for simulation by Network Simulator (NS-2.35) and shown by performance metrics which is the best one. Keywords Destination Sequenced Distance Vector (DSDV), Dynamic Source Routing Protocol (DSR), MANET, mobile gateway, Network Simulator (NS-2.35). 1. INTRODUCTION Mobile communications and wireless internet access are increasingly becoming an essential part of people's lives in this era of information technology. The growing interest by commercial, rescuer and fighter aircrafts in providing internet access and cellular connectivity in the cabin has led to the emergence. Apparently, a satellite communications link is the most feasible and flexible way to keep the aircraft connected to the ground throughout the flight. But with a satellite, there is always a one-way end-to-end propagation delay required for the signal to travel up and down from the satellite. This is not cost effective for bandwidth usage. So, other effective way can be applied to obtain seamless communication such like as Mobile Ad hoc network [1]. A Mobile Ad hoc Network (MANET) is a collection of wireless nodes that can dynamically form a network to exchange information without using any pre-existing fixed network infrastructure. Moreover, MANET is a self-organized and self-configurable network where the mobile nodes move arbitrarily. The mobile nodes can receive and forward packets as a router. Each node operates not only as an end system, but also as a router to forward packets. The nodes are free to move about and organize themselves into a network. These nodes change position frequently. A pair of mobile nodes may communicate with each other either directly or indirectly with the help of the intermediate nodes in the Mobile Ad Hoc Network [2][3][4]. Most of the previous researches on MANET with different routing protocols have mainly analysed the horizontal and vertical scenario in a communication environment [5]. But in this approach an aircraft will act as a gateway. So, in this research gateway is configured as mobile by which this approach can be applied in the aeronautical communication. It is our a very little attempt to obtain a cost effective way to communicate in air to air without using most costly Satellite link. 2. SIMULATION SCENARIO DESCRIPTION Since, in the MANET the aircrafts themselves act as a gateway therefore, the simulation is done for mobile gateway. Here by this network air-ground as well as air-air communication can be made very effectively. The usage of Satellite link will be reduced. So, the end-to-end delay will be reduced appreciably. Consequently, a cost effective way for communication will be achieved. Fig 1 shows that MANET is envisioned as a means to extend the coverage of air-ground access networks. By enabling aircraft themselves to act as network routers, a mobile ad hoc network is formed in the sky. Fig 1: Scenario of air-ground (A/G coms) and air-air (A/A coms) communication by Mobile Ad hoc Network with mobile gateways [6]. A/G coms Satellite systems A/A coms A/A coms Ground network Mobile gateway Mobile gateway A/G coms