IPv6-based Multihoming Standardization Activities April, 2008 SOURCE TTA TITLE IPv6-based Multi-homing Standardization Activities MEETING CJK 08 NGN 12 CONTACT Yong-Geun Hong ( yghong@etri.re.kr ) Tel : +82 42 860 6557 Fax : +82 42 861 5404 IPv6-based Multihoming Standardization Activities April, 2008 Yong-Geun Hong

Purpose of this Contribution Introduce of the work of IPv6-based multihoming activities in SG13 Raise the issues of multihoming related technologies How to collaborate the multi-connection work in SG13

IPv6 related Recommendation in ITU-T SG13 Y.2051: General overview of IPv6-based NGN Y.2052: Framework of Multi-homing in IPv6- based NGN Y.2053: Functional Requirements for IPv6 Migration in NGN Y.2054: Framework to support Signalling for IPv6 based NGN

IPv6-based Multihoming Standardization Activities in SG13 - Y.2052

Scope of Y.2052

Overall configuration model of IPv6-based NGN

Multi-homing in IPv6-based NGN

General requirements of multi-homing IPv6-based NGN transport stratum shall provide users multiple access capabilities to the network. IPv6-based NGN shall provide multiple accesses to heterogeneous access networks. A network shall have multiple network connections with other networks. A user terminal shall have multiple network connections with network. A user terminal shall support multiple network interfaces. A user terminal shall have multiple IPv6 addresses in a network interface. A user terminal shall have capability to use multiple connections simultaneously. A user terminal shall acquire (or relinquish) additional IPv6 addresses dynamically via a user terminal’s movement or host renumbering protocol. A user terminal shall acquire (or relinquish) additional network interface dynamically via multiple network interfaces or tunnel configuration. A network shall acquire (or relinquish) additional prefixes dynamically via the router renumbering protocol [b-IETF RFC2894].

Requirements of site multi-homing Core network shall be able to provide multiple network connections to other networks. Access network shall be able to provide multiple network connection to other networks.

Requirements of host multi-homing A user terminal shall be able to have multiple network connections to access networks with multiple IPv6 addresses and/or multiple network interfaces. A user terminal shall be able to have multiple IPv6 addresses and/or multiple network interfaces and shall be able to connect to multiple heterogeneous access networks with multiple IPv6 addresses and/or multiple network interfaces. A user terminal shall be able to activate those multiple network interfaces/multiple IPv6 address simultaneously. A mobile user using host multi-homing feature in IPv6-based NGN shall be able to continue the services, even though the mobile user continues to move from one access network to the other access network using different access network technologies.

Traditional communication

Usage of multiple network interfaces

Usage of multiple IPv6 addresses

Usage of multiple transport sessions

NGN Functional architecture related to multi-homing

Applications of multi-homing Always-on connectivity Load sharing Traffic Engineering Fault tolerance with redundancy Session continuity across access networks

Issues of Multihoming related Technologies

Multihoming Usually, it refers layer 3 (network layer, IPv6) multihoming But, there are other layer which are related to multihoming Multi-radio/Multi-channel in PHY/MAC Multi-homing/Multi-streaming in Transport layer

Multi-radio in PHY/MAC (1)

Multi-radio in PHY/MAC (2)

Multiple CSMA in PHY/MAC (1)

Multiple CSMA in PHY/MAC (2)

Multi-radio Handover

Multi-homing in Transport layer (e.g. SCTP)

Multi-streaming in Transport layer (e.g. SCTP)

How to collaborate Multi-connection work in SG13

Multi-homing vs. Multi-network Multiple connections particularly based on network layer characteristics (e.g., multiple IPv6 addresses) Multi-network A network where multiple IP addresses, multiple transport sessions, and changeable QoS parameters are used with based on multiple radio, multiple channel, and multiple network interfaces

After the work of Y.2052 In Y.2052; After that; Multi-homing based on IPv6 is described After that; The study of Multi-network including Y.2052 is needed It is necessary to describe multi-homing/multi-network in entire layer So, the work of multi-connection is very valuable and inspired