Interface%20Selection%20for%20a%20Multihomed%20Mobile%20Router%20(draft-park-mis-01.txt)

1
Interface Selection for a Multihomed Mobile
Router(draft-park-mis-01.txt)

• 67th IETF
• Semun Lee
• Seoul National University
• smlee_at_mmlab.snu.ac.kr

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Problem statement

• Various characteristics of access networks
• WCDMA (3G), WiFi, WiMax/WiBro,
• A multihomed mobile router (MMR) has multiple
  kinds of wireless interfaces, each of which is
  attached to different access networks
• How to exploit them?

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Multiple interface selection

• A multihomed mobile router (MMR) selects
  appropriate access network to forward traffic

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Traffic control option
Option type (8bits)
Opt. value length (8)
Preference (16bits)
Traffic class (8bits)

• Option type
• 001xxxxx
• Option value length
• 3
• Traffic class
• Represents the traffic class to which the packet
  belongs
• Preference
• Represents the detailed requirement of the traffic

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Test Implementation

• Fedora core 4
• Kernel version
• ARs and MMR 2.6.15
• Other machines 2.6.9
• Using ip6tables and libipq library, we captured
  packets from MN to CN at MMR and select proper
  egress interface of MMR for that packet
• The interface is selected based on pre-defined
  policy
• We tested video streaming from MN to CN

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Conclusion

• An interface selection mechanism is needed to use
  the accessibility of a multihomed mobile router
  efficiently
• Information needed to select appropriate access
  network is carried on the traffic control option
  in the Hop-by-hop options extension header