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Interface Selection for a Multihomed Mobile Router (draft-park-mis-01.txt). 67 th IETF Semun Lee Seoul National University smlee@mmlab.snu.ac.kr. Problem statement. Various characteristics of access networks WCDMA (3G), WiFi, WiMax/WiBro, …

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Interface selection for a multihomed mobile router draft park mis 01 txt

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

67th IETF

Semun Lee

Seoul National University

smlee@mmlab.snu.ac.kr

Seoul National University


Problem statement
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?

Seoul National University


Multiple interface selection
Multiple interface selection

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

Seoul National University


Traffic control option
Traffic control option

  • 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

Option type (8bits)

Opt. value length (8)

Traffic class (8bits)

Preference (16bits)

Seoul National University


Test implementation
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

Seoul National University


Conclusion
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

Seoul National University