1presentation_id spring von 2001 session 32 - 4g wireless: future of voip 4g: the end of the...

1Presentation_ID Spring VON 2001 Session 32 - 4G Wireless: Future of VoIP

4G: The End of the Intelligent 4G: The End of the Intelligent NetworkNetwork

Dana blair ([email protected])

678-352-2789

Spring VON 2001 Session 32 - 4G Wireless: Future of VoIP © 2000, Cisco Systems, Inc.

• Current mobile wireless infrastructure is the last outpost of the Intelligent Network

• Service delivery centered around SS7/IS-41/GSM MAP intelligent nodes within the network

• 1G is POTS over the air

• 2G/2.5G/3G is ISDN over the air

Pre-4G Intelligent NetworkPre-4G Intelligent Network


• Every digital wireless phone is an ISDN phone with handoff and paging

• Voice service deployment with 3G is equivalent to service deployment with ISDN

• ISDN was unsuccessful in deployment of new voice services and integrated voice/data.

• However, 3G has cracked open the door with SIP and IPv6 endorsement

Pre-4G Intelligent NetworkPre-4G Intelligent Network


2G to 4G Voice Delivery2G to 4G Voice Delivery

BTS

Mobile Switching Center(MSCA)

Base StationController

2G

Circuit

Node BMSC Server

RNC3G R’99

ATMATM

ISDN w/ handoff

ISDN w/ handoff

3G R’00 VoIP Node B

Call State Control FunctionSIP Call stateful Proxy

SGSNRNC

ATM IP Tunnel IP Tunnel

GGSN

Internet

Node B4G VoIP

IPSIP Media Gateway

PSTN


• ISDN call model with SIP protocol instead of Q.931

• Replace SS7/IS-41/GSM MAP application development with SIP

• Voice call control performed by Intelligent Network nodes (CSCF, …)

• Similar to ISDN voice and integrated voice/data service deployment model

3G View of SIP3G View of SIP


• Need larger address space for billions of mobile devices

• Permanently assign an IPv6 address to every mobile device

• Global tromboning through Intelligent Network nodes

• Mobility managed through IP tunneling

3G View of IPv63G View of IPv6


2G to 4G Data2G to 4G Data

BTS

PSTN

Mobile Switching Center(MSCA)

Base StationController

2G

Circuit

ISDN w/ handoff

Node B4G

IP

Node B SGSN

2.5G GPRS RNC


GGSN

V.110 NAS

Node B SGSNRNC


GGSN3G

UMTS Internet

3G data delivery is the same as 2.5G


• Multimode radio still needed

• Similar throughput, delay, reliability, QoS advantage

• Same ISDN call model

• Voice and Data continue to use seperately signalled channels

• Very similar service delivery model.

3G compared 2G/2.5G3G compared 2G/2.5G


• How much energy can be squeezed into a cubic meter of air without damaging plants and animals ?

• Transmission rates are limited by the output power of the mobile device and human factors

4G: What About Bandwidth ?4G: What About Bandwidth ?


• Battery technology improves

• Human factors do not change.

Why does a microwave oven shut off immediately when the door is open ?

• Solution - decrease the distance from handset to receiver with greater base station density

4G: What About Bandwidth ?4G: What About Bandwidth ?


• GSM/TDMA/EDGE/CDMA 2G/2.5G radios

• IP over 3G R’99 ATM infrastructure

• SIP and IPv6 in the handset

• Optimal internet routing and handoff protocols

• Greater base station density improves bandwidth

A View of 4GA View of 4G


• Seamless use of many radio protocols both licensed and unlicensed spectrum (802.11, bluetooth, cellular, …)

• Integration of voice and data over the same transmission channel

• Integrated voice and data SIP-enabled applications

A View of 4GA View of 4G

1presentation_id spring von 2001 session 32 - 4g wireless: future of voip 4g: the end of the...

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