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IPv6 in 3G Core Networks
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Presentation of IPv6 in 3GPP Core Networks. Chinese IPv6 Summit, April 5th, 2000
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IPv6 in 3G Core Networks
1.
IPv6 In 3G
Core Networks John Loughney Research Engineer / Project Manager Nokia Research Center, Helsinki 1 © NOKIA 3g-ipv6.PPT/17-03-2000
2.
Table of Contents
• Introduction • 3G Architecture • Some IPv6 benefits for 3G • Drawbacks of IPv4 • Current 3G Network Architecture • Conclusion • Appendices • Current 3GPP Architecture 2 © NOKIA 3g-ipv6.PPT/17-03-2000
3.
Introduction
• 3G consists of several radio access technologies (WCDMA, EDGE, etc.) attached to a common core network. • IPv6 is an option in the current 3GPP specifications. • Specifications for an IP-based 3G network are currently being developed. • Two levels of IP protocols in IP based 3G Networks. • Transport level (Network layer transport) • Application level (IP Telephony layer) 3 © NOKIA 3g-ipv6.PPT/17-03-2000
4.
All-IP System Level
Architecture Application servers Service SCP capability HSS CAP OSA servers Gr+ WIN MAP+ Iu-PS 3G RAN SGSN GGSN IPv6 TSGW PSTN ISUP RAS All-IP Core MGW RSGW Legacy WLAN, DSL, Cellular cable... MAP SIP IS-41 FW H.248 CSCF MGCF MRF Internet CSCF Call State Control Function MRF Multimedia Resource Function HSS Home Subscriber Server RAS Remote Access Server (DSLAM, head end…) MGCF Media Gateway Control Function RSGW Roaming Signaling Gateway MGW Media Gateway TSGW Transport Signaling Gate 4 © NOKIA 3g-ipv6.PPT/17-03-2000
5.
IPv6 Benefits for
3G • Protocol for bigger, better Internet. • Address Space Problem • There will be billions of mobile terminals when the first IP based 3G networks are deployed. • Since these terminals should have IP addresses, the address space for IPv4 is not sufficient. • The lack of IPv4 addresses will be first felt in Asia. • Autoconfiguration • IPv6 includes address autoconfiguration, which can help network administrators in configuring the networks. • Security and mobility built-in • Global address facilitate end-to-end security. • IPv6 includes packet encryption and source authentication. • To support real-time traffic, IPv6 has a "Flow Label". 5 © NOKIA 3g-ipv6.PPT/17-03-2000
6.
IPv4 Successes
• Behind huge success of Internet: • “Everything” supports IPv4 • 3G network architecture is considered because synergy with existing Internet • …but • Security issues are unsolved. • IPv4 requires the use of NAT between operators and even within large operators - which will be expensive and hard to manage. • Global roaming will be quite difficult. • IPv4 is running out of addresses. • Transition to IPv6 will take place - 3G will be the driver. 6 © NOKIA 3g-ipv6.PPT/17-03-2000
7.
IPv6 Deployment Problems
• Existing operator networks & hardware are based on IPv4. • Extensions to legacy call control protocols may be required by IPv6. • Support for legacy IPv4 systems. • Interworking with existing IPv4 networks. • But, there are solutions for these problems, the trick is picking the proper solutions for the correct situations. 7 © NOKIA 3g-ipv6.PPT/17-03-2000
8.
Deployment Scenarios (1/2)
• Operator deployment decision: • Interoperability problems may exists, due to existing equipment, operators may end up of selecting IPv4 • IPv4 and the IPv6 are not directly compatible, protocol interworking / conversion / tunneling is needed • 3G networks are fully IPv6 based at deployment on both transport and application level. • The solution is future proof, backward compatible and interoperability is assured. 8 © NOKIA 3g-ipv6.PPT/17-03-2000
9.
Deployment Scenarios (2/2)
IPv6 Device IPv4 IPv6 Device 3G Core Network IPv6 Network 6to4 3G Core Network IPv4 Internet Router Local servers (e.g., DNS, DHCP) Dual Stack Router Dual Stack IPv6 Network Host 9 © NOKIA 3g-ipv6.PPT/17-03-2000
10.
Conclusions
• 3G networks will be the ultimate driver for IPv6 deployment. • The inter-working between the legacy IPv4 network and the 3G IPv6 network can be handled at the borders. • 3G Core Networks should be IPv6 based right from the start: • The transition period between the legacy IPv4 networks and the IPv6 networks will be considerably shorter. • Less time, money and effort will be spent on fixing problems caused by IPv4. • IPv6 + 3G = the Mobile Information Society. • China stands in an important position to help bring this about. • Since the Y2K problem was solved, then it must be time to address IPv6. 10 © NOKIA 3g-ipv6.PPT/17-03-2000
11.
Further Reading
• Nokia 3G Page • http://www.nokia.com/3g/index.html • IETF IPng Working Group • http://playground.sun.com/ipng • Third Generation Partnership Project • http://www.3gpp.org • Third Generation Partnership Project (ANSI) • http://www.3gpp2.org • IPv6 Forum • http://www.ipv6forum.com/ • Internet Engineering Task Force • http://www.ietf.org 11 © NOKIA 3g-ipv6.PPT/17-03-2000
12.
Appendices
• 3GPP Release 1999 Protocol Stack • 3GPP Release 1999 Architecture • 3GPP Release 2000 Proposed All IP Architecture 12 © NOKIA 3g-ipv6.PPT/17-03-2000
13.
R99 Interfaces and
Protocols UMTS User Plane Application E.g., IP, E.g., IP, PPP, PPP, OSP OSP Relay Relay PDCP PDCP GTP-U GTP-U GTP-U GTP-U RLC RLC UDP/IP UDP/IP UDP/IP UDP/IP MAC MAC AAL5 AAL5 L2 L2 L1 L1 ATM ATM L1 L1 Uu Iu-PS Gn Gi MS UTRAN 3G-SGSN 3G-GGSN 13 © NOKIA 3g-ipv6.PPT/17-03-2000
14.
Rel. 99 Reference
Architecture WCDMA air interface MS = Mobile Station (MT+TE+USIM) UTRAN = UMTS Terrestrial Radio Iub UE = User Equipment (= MS in ETSI) Access Network BS = Base Station RNS = Radio Network System UE Iu RNC = Radio Network Controller (MS) BS WMSC/ PLMNs, PSTN, RNC GMSC ISDN, etc... VLR UE BS (MS) MAPe CAP CAP RNS Gs HLR CAP SCP Iur (optional) MAPe CAP UE BS (MS) 3G- RNC GGSN IP-network SGSN UE BS 3G-SGSN = 3G Serving GPRS Support Node (MS) WMSC = Wideband MSC GGSN = Gateway GPRS Support Node GMSC = Gateway MSC RNS SCP = Service Control Point (IN/CAMEL) UTRAN 14 © NOKIA 3g-ipv6.PPT/17-03-2000
15.
Rel. 00 All-IP
Reference Architecture Alternative Legacy mobile Applications & signaling Access Services *) Network Network SCP Multimedia CSCF IP Networks R-SGW Mh Mw SGSN Ms GGSN CAP Mm Gn HSS *) Cx Other PLMN CSCF Gr Mg Gp Gi Mr Gi EIR MRF TE MT ERAN Gf MGCF T-SGW *) Gc Gi R Um Iu-ps' SGSN GGSN Mc Iu Gi Gn Iu 1 PSTN/ TE MT UTRAN MGW MGW Legacy/External R Uu Nb Iu 2 Mc Mc Iu 1 = Iucs (RTP, AAL2) Nc 2 Iu = Iu (RANAP) MSC server GMSC server T-SGW *) MAP MAP Mh Applications & Services *) HSS *) R-SGW *) *) those elements are duplicated for figure Signalling Interface layout purpose only, they belong to the same Signalling and Data Transfer Interface logical element in the reference model 15 © NOKIA 3g-ipv6.PPT/17-03-2000
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