Interworking IPv6 in Mobile Networks
Mat Ford [email protected]
© British Telecommunications plc, 2002 2
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 3
Typical Broadband IP Model
L2TP Tunnel
Access PoP
ISP
ISP
INTERNET
Carrier IP core
Access PoP
© British Telecommunications plc, 2002 4
BAS
Broadband ‘Direct’
Access PoP
ASP
ASP
INTERNET
Access PoP
Carrier IP core
© British Telecommunications plc, 2002 5
IP Mobility
No true IP mobility is available L2TP provides limited IP mobility within the
boundaries of the specific access network Only MobileIP technology can provide true
IP mobility to end users
© British Telecommunications plc, 2002 6
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 7
IPv6 in 3G NetworksIM Domain
IPv6
PS DomainIPv4 or IPv6
Existing IPv4Internet
SGSN GGSN
Mobile Terminal
SIP ProxyServer
Media/SignallingGateway
PSTN
SIP Client
SIP ProxyServer
GTP OperatorsISP
WWW Server
© British Telecommunications plc, 2002 8
IPv6 in Broadband Networks
DSLAMATM
IP Core
Internet
BASInternet VC – Variable Bit Rate
SIP VC – Constant Bit Rate
IPv6 Multimedia Domain
SIP Serve
r
Other Operator’s Multimedia Domain
Globally routable IPv6 address(es)
IPv4 or IPv6 address
© British Telecommunications plc, 2002 9
Broadband/3G Integration
Unified infrastructure- No interworking or gateways
No addressing problems- Forecasted volumes easy to cater for
Leverage application development for maximum returns
© British Telecommunications plc, 2002 10
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 11
MobileIPv6 Benefits
MobileIPv6 + Broadband ‘Direct’ model is a powerful enabler of IP mobility
End-users running services are continuously on-line and contactable while roaming between broadband network access segments
© British Telecommunications plc, 2002 12
MobileIPv6 and Broadband
Without MobileIP, connections from UserA to UserB have to go via ISP A and ISP B
Inefficient routing Poor scalability Multiple single-points-
of-failure
ISP B
UserA
UserB
ISP A
© British Telecommunications plc, 2002 13
MobileIPv6 and Broadband
ISP B
UserA
UserB
ISP A
Initial traffic only passes through ISPs
Subsequent traffic direct to Care-of-address
Home Agent
Home Agent
Holds care-of-address of user B
Holds care-of-address of user A
© British Telecommunications plc, 2002 14
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 15
IPv6 Transition & Interworking
Transition- how we migrate to IPv6
Interworking- how we continue to operate with IPv4
New networks have no transition requirements
Transition requirements for core networks met through routine upgrades
© British Telecommunications plc, 2002 16
IPv6 Interworking
Interworking multimedia domains- Enabling SIP application interworking- Deploy proxies at the network boundary
Interworking network core- Dependent on type of address allocation to end-
user- Translation is required where user has no IPv4
address
© British Telecommunications plc, 2002 17
IM DomainIPv6
PS DomainIPv4 or IPv6
Existing IPv4Internet
SGSN GGSN
Mobile Terminal
SIP ProxyServer
Media/SignallingGateway
PSTN
SIP Client
SIP ProxyServer
GTP OperatorsISP
WWW Server
Interworking Options
Potential points of IPv4/IPv6 interworking
support
© British Telecommunications plc, 2002 18
NAT-PT Translation
DSL Access Network
IP Network (IPv4)Access Router (IPv6)
End User Equipment(IPv6 only)
NAT-PT
IPv6 DNS
IPv4 DNS
DNS exchange initiates communication via translator
Communication with IPv4 via translator
© British Telecommunications plc, 2002 19
DSTM Support for native IPv4
DSL Access Network
IP Network (IPv4)
Access Router (IPv6)End User
Equipment(Initially IPv6
only)
DHCPv6End user discovers communication to IPv4 – requests temporary IPv4 address
Native communication with IPv4
IPv4 over IPv6 tunnel
© British Telecommunications plc, 2002 20
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 21
Smart v6 Trial Collaboration between BT, SmarTone and
Ericsson Demonstrating:
- IPv6 applications- IPv6/IPv4 interworking- IPv6 over GPRS- MobileIPv6- Intelligent content delivery
© British Telecommunications plc, 2002 22
Smart v6 Trial
Scenario 1: IPv6-only clients, IPv6-only network running Quake, mp3, Video, WWW
Scenario 2: Interworking IPv4 and IPv6 Scenario 3: MobileIPv6 and content
customisation Scenario 4: Inter-technology handover
© British Telecommunications plc, 2002 23
IPv4 GPRSContainer
RNC
WLAN BS2
Serial Router 2
Ultima202.140.100.18
202.140.100.22-30
HKLive IPv4
MAP202.140.100.20
Scenario 4: Fixed/Mobile
roaming
R520Ethernet
Scenario 3: Broadband MobileIPv6
Scenario 2: Wireless
broadband IPv6
WLAN BS1 Scenario 1: Fixed
broadband IPv6
VOD
Local Native IPv6 Network
HA
Hub 3
Hub 2
APPS(WWW, MP3, Quake, DNS)
202.140.100.17
PROXY202.140.100.19
CN
Hub 1
Router 1
Ethernet 6in4 tunnel202.140.100.21
PC 6in4 tunnelPrivate IPv4 addresses
To UK
PC
MIPv6
MIPv6
© British Telecommunications plc, 2002 24
Scenario 1: Broadband IPv6
Applications Server
DNS Server
HK IPv6 Network
WLAN
Quake IPv6 LocalInternet
IPv6 MP3 Audio
IPv6 VoD
© British Telecommunications plc, 2002 25
Scenario 2: IPv6 meets IPv4
DNS Server
HK IPv6 Network
IPv4 Internet
UK IPv6 Network
IPv6 Internet
IPv4Internet
IPv6 MP3 Audio
© British Telecommunications plc, 2002 26
Scenario 3: MobileIPv6
Portal Server
Database Server
Home Agent
IPv4 InternetHK IPv6
Network
Local News & Weather
Home Domain
Office Domain
WLAN
Business News, Shares & Reminders
WLAN
MIPv6
© British Telecommunications plc, 2002 27
Scenario 4: Inter-technology handover
Portal Server
Database Server
Home Agent
IPv4 Internet
WLAN
HK IPv6 Network
GPRS
Business News, Shares & Reminders
Mobile Domain
Low Bandwidth
Business News, Shares & Reminders
GPRS
Office Domain
High Bandwidth
Business News, Shares & Reminders
Reformatted
MIPv6
© British Telecommunications plc, 2002 28
Smart v6 Trial
© British Telecommunications plc, 2002 29
Agenda
Broadband IP network evolution Broadband/3G integration Benefits of MobileIPv6 Interworking options
- NAT-PT- DSTM
Smartv6 Demonstration Conclusions
© British Telecommunications plc, 2002 30
Conclusions
Provide a Broadband ‘Direct’ architecture- No ISP lock-in- Optimises bandwidth consumption- Greater flexibility for end-users
Build a network that will scale- Use IPv6
Allow for ‘always-on’ P2P applications- Requires globally routable addressing- Requires IPv6
© British Telecommunications plc, 2002 31
Conclusions
Prepare for 3G multimedia convergence- 3G IP multimedia *will* run IPv6 only
IPv6 provides many advantages for broadband
- Autoconfiguration, mobility, security…
Transition and migration issues must be overcome
© British Telecommunications plc, 2002 32
Useful Links
www.ist-ipv6.org www.bt.com/ipv6 www.6winit.org
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