Gprs vs Edge

FLOW OF PRESENTATION

1 GPRSINTRODUCTIONFEATURESARCHITECTUREMODULATION-GMSKMOBILITY MANAGEMENTSERVICES

2. EGPRSINTRODUCTIONMODULATION IMPLEMENTATION

3.COMPARISON4 CONCLUSION

INTRODUCTION

•What is GPRS?

•Uses Packet Switching

•Multi-User Sharing

FEATURES

• High Speed (Data Rate 14.4 – 115 kbps).

• Efficient use of radio bandwidth.

FEATURES

• Internet on the Mobile

• Billing based on volume of data transferred

• Constant connectivity.

GPRS ARCHITECTURE

User data & Signaling data

Signaling data

BTS

BTSMS

BSC Gb

SGSN

Gf

GsGr

DEIR

MSC/VLR

HLR

Gc

Gn

GGSNGi

PDN

Gp GGSN

GMSK

•GMSK=FSK.

Data

Modulated signal

1 10 0

f0 f0 f1 f1

MOBILITY MANAGEMENT

• Introduction

•Purpose

STATE MODEL

LOCATION UPDATE

ROUTING UPDATE

• Intra-SGSN RAU

• Inter-SGSN RAU

SERVICES

PRODUCTIVITY INFORMATION

ENTERTAINMENTCOMMUNICATION

INTRODUCTION

•EDGE = Enhanced Data rates for GSM Evolution.

•EDGE is an extension to GPRS

EDGEGPRS EGPRS

MODULATION USED

• 8-PSK

3∏ /8 solves the requirement for infinite dynamic range on the power.

EDGE IMPLEMENTATION

Downlink

uplink

Class Downlink uplink

A 8PSK GMSKB 8PSK 8PSK

•EGPRS introduces changes to GPRS only on the base station system part of the network.

DATA

DATA

TRANSMISSION RATEpractical data rate 115 Kbps theoretical up to 171.2 Kbps

practical data rate 384 Kbpstheoretical up to 473.6 Kbps

GPRS

EGPRS

TRANSMISSION TECHNIQUE

•GPRS - Packet Switching.

•EGPRS – Packet Switching+Link Adaptation

PACKET SWITCHING

•Message = packet1+packet2+………

Typical packet format

HEADER

USER DATADEST

IDSOURCE ID

MSG ID PCKT ID

P3P2

P1 P2 P3

P1N1

T3

N2

N3

T4

T2 T1

H2

H4

H5

H3

H1

N4

P1 P2P3

LINK ADAPTATION

•Uses MCS - radio link quality.

•Downlink- MSUplink - BS

MODULATION USED

•GPRS------------ GMSK.

•EGPRS---------- GMSK and 8-PSK.

CODING SCHEMES

PACKET HANDLING

•In GPRS, Re-segmentation is not possible.

•In EGPRS, Re-segmentation is possible.

INTERLEAVING

OTHER FACTORS

• Addressing Window

• Modulation Bit Rate

• User Handling Capacity

• Spectral Efficiency

SERVICESServices GPRS EGPRS

MMS

Audio/VideoStreaming

VideoMessaging

FileDownloads

VideoTelephony

BEST FITTED TECHNOLOGY

MODERATETECHNOLOGY

NOT AVAILABLE

CONCLUSION

• EGPRS- the BETTER ONE

• FUTURE = EGPRS