EDGE

Supercharging your GSM

network for high-speed

mobile data

With businesses and consumers embracing

multimedia services, the importance of wire-

less data is increasing on an unparalleled scale

and driving savvy operators to seek affordable

ways to boost data rates. If you are looking to

do this, look no further. Enhanced Data rates

for GSM Evolution (EDGE) has arrived.

A here-and-now radio interface, EDGE intro-

duces new coding schemes, improved link

adaptation, and increased spectral efficiency

to boost performance. Fully compatible with

legacy GSM/GPRS network infrastructures,

EDGE is the evolutionary step towards high-

speed mobile data and multimedia services.

EGPRS

In contrast to GPRS’ four coding

schemes, EGPRS (Enhanced GPRS)

introduces nine new modulation and

coding schemes (MCS1-9) right out of

the box. The higher MCS5-9 coding

schemes utilize the new modulation

scheme (8-PSK); the lower coding

schemes continue to address the preva-

lent GMSK modulation scheme. EDGE

also features an improved link adapta-

tion mechanism whereby MCS are

switched dynamically according to the

radio conditions - even during calls.

Combining several EGPRS time slots in

an uplink or downlink enables packet-

oriented data transfer rates of up to

473 kbit/s.

Fully in step with mobile data services'

evolutionary path, EDGE enhances GPRS

while leaving options for future voice

improvements open. Fully compatible

with all existing GSM standards and

protocols and designed to use legacy

GSM or TDMA frequency bands, EDGE

is a "natural” progression in the evolu-

tionary path from GSM and GPRS. And

it outperforms GPRS data throughput

capacity by up to 300%.

Beyond that, EDGE improves spectral

efficiency to deliver capacity gains. The

first choice for operators who do not

own UMTS licenses, EDGE also pro-

vides ubiquitous coverage to operators

seeking to deploy UMTS in densely

populated areas. A cost-efficient way to

optimize high-quality data services’

availability, EDGE’s performance satis-

fies both subscribers and operators.

And EDGE networks will prove their

merits in the field in regions through-

out the world, including North and

South America, Asia and even Central

Europe.

Beef up your network

Fax/Data/SMS

9.6 Kbps

Data

compression

(2.5x9.6 Kbps)

Mobile

Internet

Access

HSCSD

57.6 Kbps

(+ data com-

pression GPRS

Pilot System)

GPRS

(9-170 Kbps

per subscriber

+ data com-

pression)

EDGE

(9-480 Kbps

per subscriber

+ data com-

pression)

UMTS

(9-2000 Kbps

per subscriber

+ data com-

pression)

Evolution of Mobile Data Services

1993 1996 1998 1999 2000 2001 2002

40 Kbit/s 75 Kbit/s 220 Kbit/s 2 Mbit/s

GPRS

EDGE

W-CDMA

Rich call services

Content-to-person services

Messaging

Provided service

SMSE-mail

MultimediaMessaging Service

Audio download

Video download

Audio streaming

Video streaming

Video Telephony

Video conferencing

Product evolution according to mobile data demand

Higher performance rates capacitate more demanding applications

Applications

EDGE empowers operators to introduce

high-speed data applications in legacy

GSM/GPRS and TDMA networks. What’s

more, EDGE boosts the speed and effi-

ciency of packet-oriented transmission

threefold over GPRS, thereby optimiz-

ing cost of ownership.

�Multimedia Messaging (MMS)

�Audio streaming

�Video streaming

�Game, ring tone, image downloads

� File downloads

� Fast Internet access

Operator benefits:

EDGE paves the road to mobile multi-

media applications while protecting

your investments:

�No new network elements required.

� Easy upgrading: Simply add or

replace EDGE CUs in the BTS and

download software.

� Fully backward-compatible with GSM

to minimize investment risk.

�New EDGE and old GSM cell sizes are

identical courtesy of high-powered

Siemens TRX.

� Siemens ECU’s best-in-class architec-

ture is ready for future applications

like interference cancellation, VoIP,

and AMR over 8PSK.

�Highest RF transmission power per

BTS footprint.

� Smooth evolutionary path. EDGE:

- supports GPRS services, even with

data rates exceeding 400 kbit/s,

- uses the GSM spectrum, band-

width, protocol, carrier structure

and cell planning process,

- complements UMTS, ensuring cost-

efficient network evolution,

- affords new business opportunities

in a strong growth market,

- offers excellent value, particularly

in terms of its cost-to-bandwidth

ratio, and

- will deliver extra voice capacity

when AMR over 8PSK is intro-

duced.

User benefits:

The latest generation of handsets fea-

tures color displays, Java, and polyphonic

ring tones, creating real demand for

higher bandwidth. EDGE significantly

improves the quality and speed of con-

sumer services:

�Multimedia Messaging (MMS),

� Faster downloading of games, pic-

tures, polyphonic ring tones,

� Satisfying speed even for complex

WAP portals,

� Fast Internet access with high data

throughput,

� Improved voice quality with wide

band AMR, and

� Reduced EMI due to more efficient

modulation.

VisitedMSC/VLR

GatewayMSC

HLR

GatewayGSN

Serving-GSN

PSTN

ISDN

Internet

Intranet

PSPDN

BSC

packet switched: GPRSTRX extension

by EDGECU + SW

SWdownload

New Abis

I/F (SWdownload)

BTS ECU

Impact of EDGE on a legacy GPRS network infrastructure

Siemens ECU – the most powerful and advanced

EDGE TRX on the market

Printed in Germany • D01003M • 0703PoD

© COPYRIGHT • Siemens AG 2003

Information and Communication Mobile • Networks

Hofmannstr. 51 • 81359 Munich • Germany

Order No. A50001-N3-P68-4-7600

This publication is issued to provide information only and is not

to form part of any order or contract. The products and services

described herein are subject to availability and to change with-

out notice.

8-PSK 8 Phase Shift Keying

AMR Adaptive Multi RateCodec

BSC Base Station Controller

BTS Base Transceiver Station

CU Carrier Unit

ECU EDGE Carrier Unit

EDGE Enhanced Data rates for GSM

Evolution

EGPRS Enhanced General Packet Radio

Service

EMI Electro-Magnetic Interference

GMSK Gaussian Minimum Shift

Keying

GPRS General Packet Radio Service

GSM Global System for Mobile

Communication

GSN GPRS Support Node

HLR Home Location Register

ISDN Integrated Services Digital

Network

MCS Modulation and Coding

Scheme

MMS Multimedia Messaging Service

MSC Mobile Switching Center

PSPDN Public Switched Packet Data

Network

PSTN Public Switched Telephone

Network

RF Radio Frequency

SMS Short Message Service

TDMA Time Division Multiple Access

TRX Transceiver

UMTS Universal Mobile

Telecommunications Systems

VLR Visitor Location Register

VoIP Voice over IP

WAP Wireless Application Protocol

W-CDMA Wideband Code Division

Multiple Access

www.siemens-mobile.com/btob