Mobile IP. 2 N+I_2k © 2000, Peter Tomsu 02_mobile_ip Evolution of Data Services Mobile IP GSM GPRS CDMA Other Cellular Circuit Switched Data Today Packet.

Mobile IPMobile IP

2N+I_2k © 2000, Peter Tomsu 02_mobile_ip

Evolution of Data Services

Mobile IPMobile IP

GSMGSM GPRSGPRS

CDMACDMA

Other CellularOther Cellular

Circuit SwitchedData Today

Packet Datafor GSM

Packet Switching For Data Built-in

Some AMPS and Non-AMPSCellular Systems Have Packet

Ability Today

Cellular Systems Are Moving Toward Support for Packet DataCellular Systems Are Moving Toward Support for Packet DataThis Is the Foundation for Mobile IPThis Is the Foundation for Mobile IP


CIP and MIPCIP and MIP

• Cellular IP

Draft for providing network access to mobile users within a small area (BS handover between a few cells)

• Mobile IP

Macro mobility between CIP LANs and other NWs


MIP RequirementsMIP Requirements

• Mobile host must be able to change his LL attachement point without changing IP address and data loss

• Mobile host must be able to communicate with any other host in external networks

• No enhancements and changes to IP protocol

• Mobility messages transmitted over the NW must be encrypted


MIP FunctionalityMIP Functionality

• Two new nodes are introduced

HA – home agent

FA – foreign agent

• MS currently not located in its home NW is serviced by FA

• FA takes care of all mobile users visiting the foreign NW

• FA notifies HA that MS is now reachable under FA’s c/o (care of) address

• All date sent to MS will be routed to home NW where HA

takes care of data packets

Does IP encapsulation

Routes them to c/o address

• Data from MS are directly forwarded to his home NW


Mobile IP Is the Solution for Wireless Connectivity

Mobile IP Is the Solution for Wireless Connectivity

• Transparent interoperability with all other hosts

• Mobile always reachable at the same IP address

• Only the home agent needs to know the mobile’s location

• All other routers do normal forwarding


Mobile IPMobile IP

• The IETF proposed standard solution for mobility at Layer 3

• RFCs 2002–2006 define the functionality

• Protocol works over any intermediate media

• Movement is transparent to hosts who communicate with the mobile user

• No IP address changes are needed to allow mobility


Overview: Mobile IP Functionality

•Mobile IP forms a layer 3 tunnel

From Home Agent (HA)

To the Mobile Node (MN)

•HA can continue to use its home address to receive IP Datagrams

MN

InternetISPISP

HA


Mobile IP

FA

FA

MN 10.31.1.1

10.31.2.1 HA

MN

Mobility Binding Table:MN CoA1.1.1.3 10.31.1.11.1.1.7 10.31.1.1 1.1.1.8 10.31.2.11.1.1.5 10.31.3.1

10.31.2.1

The Movement Is Transparent to all Other Devices

Old Data Path

New Data Path

When the new Registration is received,When the new Registration is received,a new COA is installed in the HAa new COA is installed in the HA

No Change IsNo Change IsPropagated toPropagated toCorrespondentsCorrespondents

FA MN

10.31.3.1

RFC 2002RFC 2002


MIP RoutingMIP Routing

• No optimized routing (roundabout route over HA)

• Inefficient tunnel from HA to FA (IP encapsulated in IP)

Can be optimized with minimal encapsulation (RFCs 2003 and 2004)

• Can be implemented on top of existing GPRS mobility management

Use GGSN as FA

Router at home NW serves as HA


MSC

MSC

EIRAUCHLRVLR

BSC

BSC

A Look Ahead for Cellular & PCSBackbone Transition From Circuit to PacketA Look Ahead for Cellular & PCS

Backbone Transition From Circuit to Packet

•Packet network supports all backbone & backhaul

•BSC becomes a service element in the network

•MSC services begin to distribute to service elements

BTS

BTSBackbone

Completed packet

network backbone


1999 2000 2001 2002

Peer-to-PeerPacketBackbone

DataServices

- GPRS

- CDMA data

- Mobile IP

- Packet BTS

- Packet gateways

- PSTN and toll bypass

- Feature servers

- common IP infrastructure for 2G & 3G

- high speed data / multimedia services

- no MSC

- innovative services everywhere

Expected Market EvolutionExpected Market Evolution


MSCBSC

PacketBTS

BTS

PSTN

PacketsBTS Backhaul

• Low cost IP packet backhaul

Reduced recurring costs

Better bandwidth efficiency

Positioned for 3G

Network Migration 1

BTS Packet BackhaulBTS Packet Backhaul

IP

GPRS


MSCBSC

2G Voice / data

PacketBTS P acket

NetworkInternet

• Minimize MSC dependence

VoIP

Offload traffic

PSTN/Toll Bypass services

Data Services

Network Migration 2

PSTN

IP

Circuit/Packet GatewaysCircuit/Packet Gateways

Circuit/PacketGateways


MSCBSC

Circuit Gateways

2G Voice / dataService Gateways

PacketBTS

PacketNetwork

PSTN

Internet

• Enhanced Services

Feature servers

APIs for 3rd parties

Rapid service delivery

Network Migration 3

Service GatewaysService Gateways

Circuit/PacketGateways


Internet

PSTN

IntegratedBTS

IntegratedBTS

IP Network

CircuitGateways

ServiceGatewaysFeature

Servers

CallControl

3rd ParyApps.

Peer-to-PeerPeer-to-Peer


MSC

EIR

AUC

HLR

VLR

BTS

Backhaul

Today’s Wireless Voice Network

Complete packet network for backhaul and backbone

BSC

BSC

MSC

MSC

EIR

AUC

HLR

VLR

“New World” Wireless Infrastructure

BTS

Backbone

PSTN

InternetServiceElement

ServiceElement

ServiceElement

ATM/IP

ATM/IP

New World VisionATM-IP Enabled Infrastructure

New World VisionATM-IP Enabled Infrastructure

Questions ???Questions ???

Mobile IP. 2 N+I_2k © 2000, Peter Tomsu 02_mobile_ip Evolution of Data Services Mobile IP GSM GPRS CDMA Other Cellular Circuit Switched Data Today Packet.

Documents

mobile ip slide

ip mobile ip fa mn

ip gprs

ip cip

ip gprs slide

ip overview

mobile users

hosts mobile