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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). 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)

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  1. 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

  2. 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

  3. Multiple interface selection • A multihomed mobile router (MMR) selects appropriate access network to forward traffic Seoul National University

  4. 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

  5. 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

  6. 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

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