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Information Seminar Paper

Title

SIMULATION OF MOBILE IP WITH MOBIWAN

Writers

MOAZZENI SUSSAN

Pages

 Start Page | End Page

Abstract

 MOBILE IP IS A PROTOCOL TO SUPPORT THE MOBILITY OF A HOST, CHANGING ITS POINT OF ATTACHMENT TO THE INTERNET. THIS PROTOCOL INTRODUCES DIFFERENT MECHANISMS, TO SUCCESSFULLY ROUTE PACKETS DESTINED TO THE MOBILE NODE [5]. BUT, SOME OF THESE INTRODUCED MECHANISMS SUFFER FROM THE LACK OF PROPER EFFICIENCY. ONE OF THESE MECHANISMS IS TRIANGLE ROUTING. IN THIS METHOD; PACKETS ARE ROUTED TO THE HOME NETWORK OF MN AND THEN TUNNELED TO MOBILE NODE (MN) BY HOME AGENT (HA) [1]. THIS INDIRECT ROUTING IS FAR FROM OPTIMAL, BECAUSE OF THE EXISTENCE OF GREAT DELAY IN DELIVERY OF THE PACKETS TO MN. ROUTE OPTIMIZATION IS A PROTOCOL TO OVERCOME DELAY IN TRIANGLE ROUTING. IN ROUTE OPTIMIZATION, MN INFORMS CORRESPONDENT NODE (CN) WITH ITS CURRENT LOCATION AND THEN, THE PACKETS ARE DIRECTLY SENT TO MN BY CORRESPONDENT NODE [1], [4]. IN THIS SIMULATION, WE HAVE COMPARED LINEAR AND STAR TOPOLOGIES WITH & WITHOUT ROUTE OPTIMIZATION. WE HAVE USED NETWORK SIMULATOR (NS) AND MOBIWAN, TO VERIFY SIMULATION RESULTS [2], [3]. IT IS NOTICEABLE THAT, DIFFERENT SIMULATIONS REGARDING DELAY PERFORMANCE OF ROUTE OPTIMIZATION, HAVE BEEN DONE BY DIFFERENT GROUPS, BUT MOST OF THEM HAVE USED UNREAL TOPOLOGY MODELS. TOPOLOGY MODEL HAS IMPORTANT EFFECTS ON RESULTS OF THE SIMULATION. GT-ITM MODEL HAS BEEN USED IN OUR TOPOLOGIES FOR HAVING A BETTER JUDGMENT ON PERFORMANCE OF ROUTE OPTIMIZATION. FEATURES OF THIS MODEL WILL BE DISCUSSED IN THIS PAPER [6]. BY EVALUATING THE RESULTS OF THE SIMULATION, WE FOUND THAT, JITTER IS NOT JUST THE FUNCTION OF ROUTE OPTIMIZATION. THE STRUCTURE OF TOPOLOGY ALSO, HAS SOME IMPORTANT EFFECTS ON IT. FINALLY WE CONCLUDED THAT, ROUTE OPTIMIZATION STRATEGIES IN STAR TOPOLOGY, REDUCES JITTER, BUT THE SAME STRATEGIES IN LINEAR MODEL INCREASE JITTER. NOTE THAT ROUTE OPTIMIZATION IMPROVES DELAY, REGARDLESS OF THE TOPOLOGY USED.

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