Implementation of Explicit Multicast with Mobile IP in Mobile Environment

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Implementation of Explicit Multicast with
Mobile IP in Mobile Environment
2003. 2. 27. J.W. PYUN, Prof. Y.J.
PARK. (Hanyang University, Korea)
Ph.D. W.T. Kim.
(Rostic Technologies. Inc.)

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Introduction

• Overview
• Explicit Multicast(Xcast)
• Mobile IPv4 concepts
• Xcast over Mobile IPv4
• Implementation(HA, FA, MN)
• Conclusion

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Overview

• Multicasting in Mobile IP
• - unicasting by tunneling
• - IGMP
• Using Xcast
• Adding Xcast function on Mobile IP software
• Experiment
• - Wireless LAN(IEEE 802.11b)

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Multicasting problem in Mobile IP
Correspondent Node
Home Agent
AP
AP
MN in Notebook
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What is Xcast?(1)

• Xcast(Explicit Multicast)
• small group multicast (max. 127)
• SSM(Source-Specific Multicast)
• No, need for multicast routing protocol
• The source encodes the list of destinations in
  the Xcast header
• The Xcast packet can be converted into a normal
  unicast packet called X2U (Xcast to Unicast)

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What is Xcast?(2)
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Xcast Application

• Xcast Application
• IP Telephony(VoIP application)
• Video conferencing
• Real-time collaborative applications
• Networked games

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Mobile IPv4 Network
Home Agent
Foreign Agent
Foreign Agent
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Mobile IPv4 protocol
Foreign Agent
Home Agent
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Implementation Environment

• Dynamics - HUT Mobile IP system
• http//www.cs.hut.fi/Research/Dynamics/
• developed at Helsinki University of Technology
  (HUT)
• Mobile IP software for Linux
• - Home Agent, Foreign Agent module for Linux
  Router
• - Dynamics Mobile Node is partially ported
• for Microsoft Windows (98SE, ME, NT4,
  2000)
• Communication availability with Mobile IP in
  wireless LANs

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Implementation Environment(II)
Correspondent Node

• Linux Router 4,
• AP(Access Point) 2,
• Notebook with
• WLAN card

Home Agent
AP
AP
MN in Notebook
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Home Agent
ICMP handler
Advertisement message
Registration Reply
X tunnel
Home Agent Main
Authentication module
Tunneling
X parse
IP - IP
ARP processor
Registration Request
Routing Table update
Binding Info.
Mobile IP module
Xcast module
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Foreign Agent
ICMP handler
Solicitation Reply
Advertisement message
Registration Reply
X tunnel
Foreign Agent Main
Authentication module
Tunneling
X parse
bitmap
IP - IP
ARP processor
Registration Request
Routing Table update
Mobile IP module
Xcast module
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Conclusion

• mobile multicasting for small group membership
• in Wireless LAN(IEEE 802.11b) with
  Xcastable Router
• embeded Xcast over Mobile IPv4 protocol
• Xcast dont need for multicast routing protocols
• Xcast only works with a limited number of
  receivers

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Reference

• IBM Explicit Multicast
• http//www-124.ibm.com/developerworks/oss/xc
  ast/
• Alcatel Explicit Multicast/Small Group Multicast
• http//www.alcatel.com/xcast/
• Xcast over Mobile IP
• draft-lee-xcast-mobile-ip-00.txt
• Explicit Multicast(Xcast) Basic Specification
  
• draft-ooms-xcast-basic-spec-01.txt