A Seamless Handoff Approach of Mobile IP Protocol for Mobile
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Transcript A Seamless Handoff Approach of Mobile IP Protocol for Mobile
A Seamless Handoff Approach of
Mobile IP Protocol for Mobile
Wireless Data Network.
資研一 黃明祥
Overview
Abstract
Introduction
Overview of Mobile IP
A Seamless Handoff Approach
Simulation and Results
Conclusion
Abstract
Today, mobile high-bandwidth data
communications are becoming the next
candidate of new targeting business.
In what kind of approach we could make
the communication more comfortable and
more correct?
Introduction
Mobile IP technique is the most common
solution for offering seamless roaming to
mobile devices.
There are many problems associated with
Mobile IP.
Such as : Triangular routing, about
tunneling management, etc.
Triangular routing problem
How to solve that problems?
Route optimization is proposed by using
binding update.
In this paper, it proposes a seamless
handoff mechanism to modify Mobile IP
protocol.
Approach
Propose an efficient handoff scheme in a
routing table.
(named Mobile Routing Table. MRT)
Propose a packet retransmission scheme
to reduce the packet loss.
Overview of Mobile IP
Main Components of MIP.
Basic Operations of MIP.
Problems in MIP.
Main Components of MIP
Home Network:
the network provide to which MN is
registered. (the address is Home Address.)
Foreign Network:
every other a MN can connect.
Care-of Address (CoA)
IP that MN registers with its home agent.
Main Components of MIP
Basic Operation of MIP
Agent Advertisement messages.
Mobile Agent Discovery.
Registration.
Tunneling.
Binding Update.
Foreign Agent Smooth Handoffs.
Problems in MIP
MIP has a triangular routing problem with
a MN roaming from HA to FA.
It causes two problems:
。Longer packet transmission time.
。The handoff process results in packet
loss.
A Seamless Handoff Approach
Difference
Standard Mobile IP:
implement a binding cache.
Our Approach:
construct an MRT in each mobile agent.
(including HA, FA, and router)
Mobile Routing Table (MRT)
Example of MRT
The State Transition
MRT Registration/Update
(1/2)
MRT Registration/Update
(2/2)
The Proposed Handoff Scheme
Packet transmission CN→MN.
Packet transmission MN→CN.
Inter-network handoff.
CN→MN
(1/2)
CN→MN (2/2)
MN→CN
MN Inter-Network Handoff
Packet Retransmission Mechanism
Comparison
(1/2)
Δ1:From MN to HA or FA.
Δ2:From FA to MN.
Δ3:From HA to FA or from previous FA to new
FA.
Comparison
(2/2)
T:Traffic between MN and CN.
N:The numbers of MNs that move from HA to
FA.
Simulation and Results
(1/4)
Simulations and Results
(2/4)
Simulations and Results
(3/4)
Simulations and Results
(4/4)
Conclusion
Based on MRT scheme, it can:
。avoid the triangular routing problem.
。a packet retransmission scheme to
reduce packet loss during handoff.