Impact of IPv6 to an NGN and Migration Strategies. Gyu Myoung Lee ETRI

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1 ITU Workshop on IPv6 Geneva, Switzerland, 4 5 September 2008 Impact of IPv6 to an NGN and Migration Strategies Gyu Myoung Lee ETRI gmlee@etri.re.kr Geneva, Switzerland, 4-5 September 2008

2 Contents Introduction Impact of IPv6 to an NGN IPv6-based NGN Impact of IPv6 Key technical solutions Roadmap for future standardization Migration Strategies Conclusion 2

3 Introduction IPv6 IETF has designed IPv6 from 1994 An Internet Layer protocol for packetswitched internetworks A much larger address space than IPv4 Many features and benefits Direction for network evolution PSTN to NGN in Telco s perspective Adopt IPv6 technologies to an NGN 3

4 Why IPv6? IPv6 and NGN One of the useful delivery protocols for the future fixed and wireless/mobile network environments Why NGN? Packet-based converged network Multiple broadband, QoS-enabled transport, Separation services with transport IPv6 + NGN = IPv6-based NGN 4

5 ITU-T Q.9/13 Impact of IPv6 to an NGN IPv6 protocol and its mechanisms in alignment with the functional architecture and reference model of NGN IPv6 protocol architectures and functional blocks in NGN Impact of possible use of IPV4 and IPV6 in transitional phases of NGN. 4 Recommendations (Jan. 2008) 5

6 IPv6-based NGN General overview Y.2051, General overview of IPv6-based NGN IPv6-based service/application Application Service Stratum IPv6 Enabled Processing IPv6 Enabled End-User Functions xdsl Access Mobile Access Wireless Access(WiMAX) Transport Stratum Core Network Fiber Access IPv6-based IP Connectivity 6

7 Impact of IPv6 Enhanced service capabilities Any-to-any IP connectivity Self organization and service discovery using auto-configuration Multi-homing using IPv6 addressing 7

8 Key technical solutions (1) IPv6 signalling Y.2054, Framework to support signalling for IPv6-based NGN Traffic class, flow label, extension header Applications ANI Signalling for service control IPv6 Enabled Application/Service Support Functions Service Control Functions IPv6 Enabled End-User Functions Signalling for tr ansport control Service Stratum IPv6 Enabled Network Attachment Control Functions IPv6 Enabled Resource & Admission Control Functions Transport Control Functions Signalling for interworking IPv4/IPv6 networks PSTN/ISDN mobile/wireless networks UNI IPv6-based Transport Functions Transport Stratum NNI Broadcasting networks Other Networks Control IPv6-based IP connectivity Media 8

9 Key technical solutions (2) IPv6 multi-homing Always-on connectivity Load sharing Traffic engineering Fault tolerance with redundancy Session continuity across access networks Y.2052, Framework of multi-homing in IPv6-based NGN 9

10 Key technical solutions (3) IPv4-to-IPv6 transition Y.2053, Functional requirements for IPv6 migration in NGN Dual stack, Configured tunnel, NAT-PT. Public Internet. Other NGN. AN-FE NACF RACF EN-FE ABG-FE IBG-FE Access Network Core Transport Network Access Network. Access Network Access Network Access Network. Customer Network.. 10

11 Roadmap for future standardization(1) Proposed roadmap items based on NGN Draft Title Target Date Y.ipv6-Transport Transport Stratum Extension in IPv6- End of 2009 based NGN (with Q.3/13) Y.ipv6-Service Service Stratum Extension in IPv6- End of 2009 based NGN (with Q.3/13) Y.ipv6-ID Framework of identity processing in IPv6-based NGN End of 2010 Y.ipv6-amf IPv6 address mapping functions for ID/LOC separation in IPv6-based NGN End of 2010 Interworking with heterogeneous Y.ipv6-interworking networks in IPv6-based NGN Mid of

12 Roadmap for future standardization(2) Additional roadmap items based on NGN (under consideration) Draft Title Target Date Y.ipv6-vcmh Y.ipv6-adhoc Y.ipv6-deploy Vertical Cognitive Multihoming in IPv6-based NGN Framework of ad-hoc network in IPv6-based NGN Deployment scenarios of IPv6- baseed NGN TBD TBD TBD 12

13 Migration Strategies (1) Basic assumption for migration IPv6 is expected to gradually replace IPv4 IPv4 and IPv6 will need to coexist during the transition NGN can run both IPv4 and IPv6 concurrently throughout the migration IPv4 IPv6 coexistence 13

14 Migration Strategies (2) Governments Policy Guideline, promotion, address allocation Network operators Deployment and operation Enabling IPv6 on the core transport network Vendors Development of technical solutions Dual-stack, IPv6-enabled end-devices Create new business and market with IPv6 14

15 Migration Strategies (3) Stepwise approach IPv6 Deployment Stage 3 IPv6 dominant Stage 2 IPv6 dissemination Stage 1 IPv6 introduction Government driven Market driven Critical timeline Time 15

16 Migration Strategies (4) Backward compatibility for gradual transition Relationships with heterogeneous networks 2a IPv6-based IPv6-based 1a IPv6-based 2b NGN2 IPv6-based 1b NGN1 IPv4-based IPv4-based 1c 2c IPv4-based 3c IPv4-based 3b 4b 3a 4c Non-NGN IPv6-based IPv4-based 4a Group 1 Intra-NGN Communication IPv6-based Group 2 Group 3 Group 4 Inter-NGN Communication Interworking with Non-NGN Interworking between Non-NGN 16

17 IPv6-based NGN Conclusion Key infrastructure for packet-based converged network Future work Preparation for increase of devices Standardization (ITU-T, IETF, etc) How to adopt IPv6 technologies to an NGN Focus on realization of NGN with IPv4- IPv6 migration 17

18 Backup Slides 18

19 Packet Format Addressing QoS Security Mobility Key features of IPv4 and IPv6 IPv4 Size of IPv6 header Variable size Constant size Optional headers Optional headers Extension headers and options IPv6 Addressing spaces Lack of address spaces Large address spaces End-to-end communications No Yes Types of addresses Unicast, multicast and broadcast Unicast, multicast and anycast Scopes of addresses Local and global Link-local, local and global Address configuration to an interface A address Multiple addresses Address allocation to an equipment Multiple interface/addresses Multiple interfaces/addresses Address Autoconfiguration Using private addresses Using public addresses Hierarchical addressing - Yes Address Renumbering - Yes Management of service conflicts Type of Service field Traffic class field Identification of traffic flows None Flow label field Recognition of control/expedite data None Hop-by-Hop extension header AH header Optional Mandated ESP header Optional Mandated Detection of new networks - RA messages Generation of new addresses - Autoconfiguration Mobility headers - Mandated Option header Optional Mandated 19

20 Functional architecture of IPv6-based NGN Applications ANI IPv6 enabled Application Support Functions & Service Support Functions Management Functions IPv6 Enabled End-User Functions Service User Profiles Service stratum IPv6 Enabled Network Attachment Control Functions Transport User Profiles Service Control Functions Transport Control Functions IPv6 Enabled Resource and Admission Control Functions IPv4 Non NGN IPv6 Non NGN IPv4 NGN IPv6-based Transport Functions IPv6 NGN UNI Transport stratum Control Media Management NNI 20

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