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MobileHost

FixedHost

FixedHost

MobileHost

WirelessNetwork

WirelessNetwork

Fixed

Host

IP-Based Network

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MobileHost

Mobile Node

Foreign Agent Home Agent

Registration Request

Registration Reply

Internet

MobileHost

Home Agent

Registration Request

Registration Reply

Internet

Mobile Node

MobileHost

Home Agent

Internet

Mobile Node

Deregistration Request

Deregistration Reply

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MobileHost

MobileHost

Packets sent by correspondent

Tunnel

Packets sent by mobile node

Mobile node withforeigh agent care-of address

Home Agent

Mobile Node with

collocated care-of address

Foreign Agent

Internet

Correspondent

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Internet

MobileHost

Internet

MobileHost

Correspondent

Correspondent

Home Agent Foreigh Agent

Update Process

Home Agent Foreigh Agent

Packets sent by correspondent

Tunnel

Packets sent by mobile node

Care-of address update

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4 bitsVersion Header

LengthType of Service Total Length of Datagram

16 bits

Datagram Identification (16 bits)

8 bits

3 bitsFlag Fragment Offset (13 bits)

8 bits8 bitsTime to Live Protocol Header Checksum

16 bits

Source IP Address (32 bits)

Destination IP Address (32 bits)

IP Options

Data Portion of Datagram

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4 bits4 bitsVersion Priority Flow Label (24 bits)

Next Header (8 bits) Hop Limit (8 bits)Payload Length (16 bits)

Source IP Address (128 bits)

Destination IP Address (128 bits)

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MobileHost

Home Agent

Internet

Mobile node

Correspondent

which doesnt know

which knows

Correspondent

Tunnel

Packets sent by mobile node

Source Routing

Packets sent by correspondent

the care-of address

the care-of address

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MobileHost

Mobile SupportRouter

Internet

Regular TCPWireless TCP

Correspondent

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Internet

Supervisor

Host

Supervisor

Host

MHMHMH

Level 2

Level 3

Level 1

Base Station

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