Mobility Management Approaches for Mobile IP Networks(2009)

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    In wireless networks, efficient management of mobility is a crucial issue to support mobile users. The Mobile Internet Protocol (MIP) has been proposed to support global mobility in IP networks. Several mobility management strategies have been proposed which aim reducing the signaling traffic related to the Mobile Terminals (MTs) registration with the Home Agents (HAs) whenever their Care-of-Addresses (CoAs) change. They use different Foreign Agents (FAs) and Gateway FAs (GFAs) hierarchies to concentrate the registration processes. For high-mobility MTs, the Hierarchical MIP (HMIP) and Dynamic HMIP (DHMIP) strategies localize the registration in FAs and GFAs, yielding to high-mobility signaling. The Multicast HMIP strategy limits the registration processes in the GFAs. For high-mobility MTs, it provides lowest mobility signaling delay compared to the HMIP and DHMIP approaches. However, it is resource consuming strategy unless for frequent MT mobility. Hence, we propose an analytic model to evaluate the mean signaling delay and the mean bandwidth per call according to the type of MT mobility. In our analysis, the MHMIP Outperforms the DHMIP and MIP strategies in almost all the studied cases. The main contribution of this paper is the analytic model that allows the mobility management approaches performance evaluation.

Existing System

          Hierarchical Mobile IP (HMIP) has been proposed to reduce the number of location updates to HA and the signaling latency when an MT moves from one subnet to another. In this mobility scheme, FAs and Gateway FAs (GFAs) are organized into a hierarchy. When an MT changes FA within the same regional network, it updates its CoA by performing a regional registration to the GFA.

                 When an MT moves to another regional network, it performs a home registration with its HA using a publicly routable address of GFA. The packets intercepted by the HA are tunneled to a new GFA to which the MT is belonging .The GFA checks its visitor list and forwards the packets to the FA of the MT .This regional registration is sensitive to the GFAs failure because of the centralized system architecture .Moreover, a high traffic load on GFAs and frequent mobility between regional networks degrade the mobility scheme performance

Proposed System

         In order to reduce the signaling load for interregional networks, mobility dynamic location management approaches for MIP have been proposed: A Hierarchical Distributed Dynamic Mobile IP (HDDMIP) and Dynamic Hierarchical Mobile IP (DHMIP). In the HDDMIP approach, each FA can act either as an FA or GFA according to the user mobility. The traffic load in a regional network is distributed among the FAs. The number of FAs attached to a GFA is adjusted for each MT. Thus, the regional network boundary varies for each MT. This number is computed according to the MT mobility characteristics and the incoming packet arrival rate. This number is adjustable from time to time according to the variation of the mobility and the packet arrival rate for each MT.

Module Description

Following are the important modules in the proposed system.

·         Mobile terminal

·         Foreign agents

·         Gateway Foreign agents

·         Mobile Server

Mobile Terminal

            The  mobile data is browsed and sent to foreign agents and through this to gateway foreign agents. Each foreign agent acts as one of the three mobile IP Strategies.

Foreign Agents

          A foreign agent stores information about mobile nodes visiting its network. The foreign agent will receive the mobile data from the mobile terminal and then send to respective gateway foreign agent. Group of foreign agents are hierarchically connected to gateway foreign agents.

 Gateway Foreign agents

              A gateway foreign agent will receive the mobile data from the foreign agent  connected to it and send the file details to mobile server.

Mobile Server

Mobile Server collects the information given by mobile terminal through foreign agents and gateway foreign agents and display the details of the file. It calculates the bandwidth, time delay for each mobile IP strategy and compare.

Hardware Requirements:

•         System                        : Pentium IV 2.4 GHz.

•         Hard Disk                   : 40 GB.

•         Floppy Drive               : 1.44 Mb.

•         Monitor                        : 15 VGA Colour.

•         Mouse                         : Logitech.

•         Ram                            : 256 Mb.

Software Requirements:

•         Operating system     : Windows XP Professional.

•         Coding Language    : Java.

•         Tool Used                  : Eclipse.

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