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My Introduction
 Mohammad
Qasim Khan
– Religion Islam
– Cast Pathan
– Country Pakistan
– Province NWFP
– Mother Language Phusto
– Family
Pakistan
Official Name: Islamic Republic of
Pakistan.
 Capital: Islamabad.
 Area: 796,096-sq. km.
 Population: 130.60 million
 Composition: 95% Muslims, 5%
othersPer

•Currency: Pak Rupee.
• Language: Urdu (National language)
• English (Official)
• Cities: Islamabad, Karachi, Lahore,
Peshawar, Quetta, Rawalpindi,
Hyderabad, Faisalabad and Multan.
•Climate Four Seasons
The Flag of PAK
MAP
Some Beautiful Pictures
Education
SSC from my home village Lund khwar
1997
 FSc from PAF College Peshawar 2001 Pre
Engineering
 BSc from Peshawar University 2003
(Computer Science)
 MSc from Peshawar University 2005
(Computer Science)
 MS-IT from Peshawar University 2007

PhD Funding
Getting funds from Pakistani Govt.
 Higher Education Commission of Pakistan
responsible for selection.
 Selection criteria includes test and
interviews.
 SIU is the Norwegian organization
Cooperating with HEC.

Jobs
Mainly teaching jobs at different levels in
Pakistan
 Last job
– Worked as a teacher in Doha Qatar
(Gulf) in a Pakistani Community Based
Education Institution.

My Research
Interest in MIP
 Research in Image Processing during
Masters


Future area Wireless Networks
Introduction to Mobile IP
 IP
supporting Mobility
 Advantages
– Communication on the go
– Seamless roaming
– Real time communication i.e. Audio or
Video
Problems with Mobility in IP
 Problem
with IP
– The network part of an IP address
locates the nodes point of attachment.
– Node needs to configure a new IP
address when it moves from one N/W to
another.
– But this new IP address causes the
existing TCP connections to abort.
MIPV6 Solution

Mobile IPv6 uses two IP addresses per MN
to separate localization semantics from
identification semantics
– transient care-of address Assigned by
Foreign Agent
– static home address does not change
Route Optimization
Data packets can be directly relayed
between the MN and CN called route
optimization.
 If the CN does not support route
optimization then all traffic between CN
and MN must be routed through home
agent.

Triangle Routing
Add a level of indirection
CH
Home network
HA
Foreign network
FA
MH
Route Optimization
CH
Home network
HA
Foreign network
FA
MH
Route Optimization
If route optimization is used, a new COA is
communicated to the mobile node’s home
agent and to the CN.
 This is called a home registration and a
correspondent registration.
 Without route optimization, the
correspondent registration is omitted.

Security Problems in MIP


When the CN receives a command to
redirect a MNs packets, how can the CN
be sure that it is the legitimate MN,rather
than a malicious third node, which has
send this command?
How can the CN rely on the mobile node
actually being present at the IP address to
which packets are to be redirected?
Return-Routability Procedure.

It is part of a correspondent registration
and consists of two tests
1)home-address test
– the MN sends a Home Test Init (HoTI)
message to the HA . The home agent
forwards the HoTI to the correspondent
node.
– The CN sends in response a Home Test
(HoT) message containing a secret
Home Keygen Token. The HoT is sent to
HA which forwards it to the MN’s current
care-of address
COA Test
– care-of-address test,
– During the COA test, the MN sends a
Care-of Test Init (CoTI) message to the
CN, which returns a Care-of Test (CoT)
message containing a secret Care-of
Keygen Token. The CoTI and CoT are
routed between the MN and the CN
directly. They do not pass the home
agent.
Use of Tokens
 The
mobile node needs both the
Home Keygen Token and the Care-of
Keygen Token to validate the
correspondent registration:
Standard CN Registration
Optimized Correspondent
Registration Using EBA
Saying of the Holy Prophet
Muhammad Peace be upon him.
 The
Ink of a scholar is more precious
than the blood of a martyr.
Thanks for your time and
patience