Abstract
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.
System
Analysis
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.
System
Requirements
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.
