IPv6 in 3G Core Networks
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Transcript of IPv6 in 3G Core Networks
1 © NOKIA 3g-ipv6.PPT/17-03-2000
John John LoughneyLoughneyResearch Engineer / Project ManagerResearch Engineer / Project Manager
Nokia Research Center, HelsinkiNokia Research Center, Helsinki
IPv6 In 3G Core Networks
2 © NOKIA 3g-ipv6.PPT/17-03-2000
Table of Contents• Introduction
• 3G Architecture
• Some IPv6 benefits for 3G
• Drawbacks of IPv4
• Current 3G Network Architecture
• Conclusion
• Appendices• Current 3GPP Architecture
3 © NOKIA 3g-ipv6.PPT/17-03-2000
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)
4 © NOKIA 3g-ipv6.PPT/17-03-2000
MRFMRF InternetInternet
SCPSCP
ApplicationApplicationserversservers
HSSHSSGr+Gr+
MAP+MAP+
CAPCAPWINWIN
PSTNPSTN
CSCF Call State Control Function MRF Multimedia Resource FunctionHSS Home Subscriber Server RAS Remote Access Server (DSLAM, head end…)MGCF Media Gateway Control Function RSGW Roaming Signaling GatewayMGW Media Gateway TSGW Transport Signaling Gate
3G RAN3G RANIuIu--PSPS
CSCFCSCFMGCFMGCF
SGSNSGSN
OSAOSA
ServiceServicecapabilitycapability
serversservers
TSGWTSGW
LegacyLegacyCellularCellular
RSGWRSGW
ISUPISUP
MAPMAPISIS--4141
IPv6IPv6AllAll--IP CoreIP Core MGWMGW
SIPSIPH.248H.248
WLAN, DSL,WLAN, DSL,cable...cable...
RASRAS
GGSNGGSN
FWFW
All-IP System Level Architecture
5 © NOKIA 3g-ipv6.PPT/17-03-2000
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".
6 © NOKIA 3g-ipv6.PPT/17-03-2000
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.
7 © NOKIA 3g-ipv6.PPT/17-03-2000
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.
8 © NOKIA 3g-ipv6.PPT/17-03-2000
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.
9 © NOKIA 3g-ipv6.PPT/17-03-2000
Deployment Scenarios (2/2)
3G Core Network
IPv6 NetworkIPv4 Internet
IPv6 Network
Dual Stack Router
Dual Stack Host
IPv6 Device
IPv6Device
3G Core Network
IPv4
Local servers(e.g., DNS, DHCP)
6to4Router
10 © NOKIA 3g-ipv6.PPT/17-03-2000
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.
11 © NOKIA 3g-ipv6.PPT/17-03-2000
Further Reading
•• Nokia 3G PageNokia 3G Page•• http://www.nokia.com/3g/index.htmlhttp://www.nokia.com/3g/index.html
•• IETF IPng Working GroupIETF IPng Working Group•• http://playground.sun.com/ipnghttp://playground.sun.com/ipng
•• Third Generation Partnership ProjectThird Generation Partnership Project•• http://www.3gpp.orghttp://www.3gpp.org
•• Third Generation Partnership Project (ANSI)Third Generation Partnership Project (ANSI)•• http://www.3gpp2.orghttp://www.3gpp2.org
•• IPv6 ForumIPv6 Forum•• http://www.ipv6forum.com/http://www.ipv6forum.com/
•• Internet Engineering Task ForceInternet Engineering Task Force•• http://www.ietf.orghttp://www.ietf.org
12 © NOKIA 3g-ipv6.PPT/17-03-2000
Appendices
• 3GPP Release 1999 Protocol Stack
• 3GPP Release 1999 Architecture
• 3GPP Release 2000 Proposed All IP Architecture
13 © NOKIA 3g-ipv6.PPT/17-03-2000
R99 Interfaces and ProtocolsUMTS User Plane
L1
RLC
PDCP
MAC
E.g., IP,PPP,OSP
Application
L1
RLC
PDCP
MAC
ATM
UDP/IP
GTP-U
AAL5
Relay
L1
UDP/IP
L2
GTP-U
E.g., IP,PPP,OSP
3G-SGSNUTRANMSIu-PSUu Gn Gi
3G-GGSN
ATM
UDP/IP
GTP-U
AAL5
L1
UDP/IP
GTP-U
L2
Relay
14 © NOKIA 3g-ipv6.PPT/17-03-2000
UTRAN
RNS
UE(MS)
UE(MS)
UE(MS)
UE(MS)
BS
RNC
RNC
WMSC/VLR
3G-SGSN
WCDMA air interface
GGSN
GMSC
IP-network
PLMNs, PSTN,ISDN, etc...
HLR SCP
MAPe
MAPe
CAP
Iu
Iub
CAP CAP
CAP
WMSC = Wideband MSCGMSC = Gateway MSCSCP = Service Control Point (IN/CAMEL)
MS = Mobile Station (MT+TE+USIM)UE = User Equipment (= MS in ETSI)BS = Base StationRNC = Radio Network Controller
3G-SGSN = 3G Serving GPRS Support NodeGGSN = Gateway GPRS Support Node
UTRAN = UMTS Terrestrial RadioAccess NetworkRNS = Radio Network System
Gs(optional)Iur
RNS
BS
BS
BS
Rel. 99 Reference Architecture
15 © NOKIA 3g-ipv6.PPT/17-03-2000
Rel. 00 All-IP Reference Architecture
Gf GiIu-ps'
Iu
GiMr
Gi
Ms
Gi
R UuMGW
Gn
Gc
Gp
Signalling and Data Transfer InterfaceSignalling Interface
TE MT UTRAN
GrOther PLMN
SGSN
GGSN
GGSN
EIR
SGSN
Gn
MGCF
R-SGW
MRF
MultimediaIP Networks
PSTN/Legacy/External
Applications &Services *)
Mm
Mw
Legacy mobilesignalingNetwork
Mc
Cx
R UmTE MT ERAN
AlternativeAccess
Network
Mh
CSCF
CSCFMg
T-SGW *)
T-SGW *)
HSS *)
HSS *)
Applications& Services *)
MSC server GMSC serverIu 1 = Iucs (RTP, AAL2)
Iu 2 = Iu (RANAP)
*) those elements are duplicated for figurelayout purpose only, they belong to the samelogical element in the reference model
McMc
MAPMAP
SCP
CAP
MGWNb
Nc
Iu 1
Iu 2
R-SGW *)
Mh