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Hybrid home network prefix for multihoming in PMIPv6 draft-hong-netext-hybrid-hnp-03

Hybrid home network prefix for multihoming in PMIPv6 draft-hong-netext-hybrid-hnp-03. Y-G.Hong , J-S.Youn ETRI IETF-79 netext Meeting @Beijing 2010.11.09. Goals of this draft. If the flow is classified by home network prefix, to support flow mobility between different interfaces

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Hybrid home network prefix for multihoming in PMIPv6 draft-hong-netext-hybrid-hnp-03

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  1. Hybrid home network prefix for multihoming in PMIPv6draft-hong-netext-hybrid-hnp-03 Y-G.Hong, J-S.Youn ETRI IETF-79 netext Meeting @Beijing 2010.11.09

  2. Goals of this draft • If the flow is classified by home network prefix, to support flow mobility between different interfaces • To enable PMIPv6 to support both inter-technology handoff and simultaneous access at the same time • Propose a hybrid home network prefix assignment scheme • Separate prefix for the purpose of inter-technology handoff and the purpose of simultaneous access • During flow mobility, some flow (prefix) is moved to another interface and some flow (prefix) is remained

  3. Motivation • In basic PMIPv6 (RFC 5213) • PMIPv6 basically supports multihoming • MN can connect to a PMIPv6 domain through multiple interfaces • But, • During inter-technology handoff, it does not support simultaneous access • Since all the home network prefixes associated with one interface are associated with another interface of a MN • If we assume that the flow is classified by home network prefix, then it cannot support flow mobility • Since flow mobility requires moving just some home network prefixes between interfaces

  4. Problems of PMIPv6 • During inter-technology handoff • The existing flows with the second interface may be disrupted • Compelled handoff of unwanted IP flows can be performed • MAG does not have sufficient information to set the handoff indicator flag • There is no way to add or delete a new home network prefix

  5. Hybrid Home Network Prefix (1/2) • Key idea • Flow is classified by home network prefix • For flow mobility, some flow (prefix) is moved another interface and some flow (prefix) is remained • Separate home network prefix into the purpose of simultaneous access and the purpose of inter-technology handoff

  6. Hybrid Home Network Prefix (2/2) • Key idea (cont’d) • Two categories of home network prefix • Static HNP : cannot beswitchable btw interfaces andused for simultaneous access • Dynamic HNP : assigned tomultiple interfaces and switchablebtw interfaces but activated on onlyone interface at a specific time and used for inter-technology handoff

  7. Message flow of HHNPA

  8. Usage scenario of HHNPA

  9. Decision of Handoff Indicator

  10. Usage on a logical interface • Two cases : • If one application uses dynamic prefixes at the starting time of comm., the session continuity through inter-technology handoff is supported. • If the typical application uses static prefixes at the starting time of comm., inter-technology handoff is not supported. • But, it is possible if the logical interface supports the change of network interface and also the change of home network prefix (only one HNP is shown to IP host stack),

  11. Next Step? • In basic PMIPv6 spec., per-MN prefix model is default and flow may be classified by home network prefix • For flow mobility by keeping the above facts, home network prefix may be separated into two categories • for simultaneous access • for inter-technology handoff • Is there interest in WG?

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