Rev A Ericsson Research2001-10-18 1

Internetdagarna 2001IPv6 in Mobile Networks

Conny LarssonEricsson Research

Rev A Ericsson Research2001-10-18 2

Presentation Outline

• Why do we need IPv6?• IPv6 in cellular networks• Migration from IPv4 to IPv6• Multi-access and IPv6

Rev A Ericsson Research2001-10-18 3

Growth of the Mobile Internet

1996 1998 2000 2002 20040

200

400

600

800

1,000

(Mill

ion

s)

Fixed

Mobile Internet

In 1999: 100 M PC’s275 Mobiles

4 year8 year (1992-2000) GSM

Mobile Internet

150 Million new usersby 2003-2004 implies

500.000/day

IPv4 addresses: 4B theoreticalChina 9 MillionEurope 80 MillionUS government 168 Million

1980: 200 users on mainframe2000: 1 mobile + 1 PC per user2020: 200 embedded, wireless devices

per user.Estimated number of users 2B==> 400B addresses required.

Rev A Ericsson Research2001-10-18 4

InternetInternet

Terminals: PC and LaptopApplications : Best effort, client-server

pull services (e.g. e-mail, FTP, surfing …etc)Mobility: Nomadicity

Home NetworkCorporate Network

Services

ServicesServices

Service Vision (Today’s Internet)

Rev A Ericsson Research2001-10-18 5

Terminals: 3G Phones, PC, Laptop, Notebook, PDA, etc.Applications : Peer-to-peer, push services, multimedia, real-time,

mobile focused services (e.g. where is the closest …)Mobility: “Seamless” mobility & Always connected to the Internet

Service Vision (Future Internet, i.e. the Mobile Internet)

WLAN

CorporateNetwork

HomeNetwork

3G CellularNetworks

Future AccessNetworks

InternetInternet

Rev A Ericsson Research2001-10-18 6

Drivers for IPv6 in Mobile Networks

IPv6Hierarchical addressing

Designed for efficientimplementation in silicon

Extended multicast/anycast support

Built-in mobility

Increased address space

Auto configuration for hosts andeasy renumbering for routers

Defined transitionmechanisms/tools

Flow identification

Built-in security

Lower Operation &Maintenance costs

Future proof design, due toflexible header extensions

Scalability

Rev A Ericsson Research2001-10-18 7

IP BackboneInterconnecting equipment/sites/networks

Primary Site

Sec. SiteAccess Site (1)

Sec. Site

RR

R

R

RR

R

AXI

AXI

AXI RXIAXI

Mgm

AXI

LargeCellHubSite

AXI

RNC

AXI

RXI

(1) RXI-router embedded inMGW on the access site

R: Embedded RXI router

RXI

Client nodes(RNC, GSN, MGW, Servers,…)

AXI

RR

MGW

RNC

PSTN

PeeringNetworksInternet

Rev A Ericsson Research2001-10-18 8

Logical Networks

Logical network: The interconnection of a specific setof function entities residing in the network elements

Example of logical networks

• Signaling network (Sigtran)

• CS network (ISDN over IP)

• Gi network (for public ISPs)

• Gi network (for private ISPs)

• Gn/Gp network (interconnecting GSNs)

• O&M network

Each logical network has a set of requirements with respect toconnectivity, addressing, QoS, security, network availability etc

Rev A Ericsson Research2001-10-18 9

3GPP UMTS Network

UTRANUTRAN UMTS/GPRSUMTS/GPRSBackboneBackbone

SGSN

GGSN

L1

RLC

PDCP

IP

TCP/UDP

Appl

RBS RNC

MAC

L1

RLC

MAC

PDCP GTP-U

Relay

L2/L1

UDP

IP

GTP-U GTP-U

Relay

L2/L1

UDP

IP

L2/L1

UDP

IP

L1

L2

L2/L1

UDP

IP

L1

IP

TCP/UDP

Appl

GTP-U

L2

Gn/Gp GiIu-PSUuUE UTRAN SGSN GGSN Host

UE

External PLMNExternal PLMNGp

Gn

User level IP

Transport level IP

Iub

IP

IPv6IPv6NetworkNetwork

IPv4IPv4NetworkNetwork

Rev A Ericsson Research2001-10-18 10

IPv6 Migration in 3G NetworksUser-level

2002 2003 2004 2005 2006

GPRSNAT / NAPT

Private IPv4 <=> Public IPv4

GPRS & UMTSNAT / NAPT / NAT-PT / NAPT-PT / SIIT

Private IPv4 <=> Public IPv4Public local IPv6 <=> Public IPv4

Public IPv6

GPRS & UMTSIMS based on IPv6

Rev A Ericsson Research2001-10-18 11

IMS Session Handling

HSS

HSS

AS

AS

A’s VisitedNetwork

B’s VisitedNetwork

HOME of A

HOME of B

2

6

810

Interr.CSCF

ServingCSCF

Interr.CSCF

ServingCSCF

7

5

9

ProxyCSCF

ProxyCSCF

3

4

IPv6Terminal

IPv6Terminal

1

12

11

RNC SGSN GGSN

RNC SGSN GGSN

IPv4 or IPv6

IPv4 or IPv6

IPv6 Domain

Rev A Ericsson Research2001-10-18 12

Multiple Access

3G CellularNetworks

EnterpriseWLAN

FixedAccess

WLAN

Rev A Ericsson Research2001-10-18 13

Conclusion

• IPv6 is a fact• IPv6 is driven by the mobile community due to the enormous

growth of users and new services (push and peer-to-peer)• 3GPP has mandated IPv6 for IMS• 3GPP has proposed using IPv6 for UTRAN• IPv6 for both user and transport level• IPv6 is not only a layer 3 issue. Applications are affected

as well

Rev A Ericsson Research2001-10-18 14

We have already started introducing IPv6.

It’s a long way to go but we willget there step by step !!

However, IPv4 will still be around forquite some time.