Gprs Vs Edge

FLOW OF PRESENTATION 1 GPRS INTRODUCTION FEATURES ARCHITECTURE MODULATION-GMSK MOBILITY MANAGEMENT SERVICES 2. EGPRS INTRODUCTION MODULATION IMPLEMENTATION 3.COMPARISON 4 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 SGSN

Gp

GGSN

Gn BSC Gb

Gf Gs

BTS

MS

BTS

EIR

Gr

D MSC/VLR

User data & Signaling data Signaling data

Gc GGSN Gi HLR

PDN

GMSK • GMSK=FSK. Data Modulated signal

1

0

0

1

f1

f0

f0

f1

MOBILITY MANAGEMENT • Introduction • Purpose

STATE MODEL

LOCATION UPDATE

ROUTING UPDATE • Intra-SGSN RAU

• Inter-SGSN RAU

SERVICES PRODUCTIVITY

ENTERTAINMENT

INFORMATION

COMMUNICATIO

INTRODUCTION • EDGE = Enhanced Data rates for GSM Evolution. • EDGE is an extension to GPRS GPRS

EDGE

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 B

8PSK 8PSK

GMSK 8PSK

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

TRANSMISSION RATE practical data rate 115 Kbps theoretical up to 171.2 Kbps DATA

GPRS practical data rate 384 Kbps theoretical up to 473.6 Kbps DATA

EGPRS

TRANSMISSION TECHNIQUE • GPRS - Packet Switching.

• EGPRS – Packet Switching+Link Adaptation

PACKET SWITCHING •Message = packet1+packet2+……… HEADER DEST ID

SOURCE ID

MSG ID

PCKT ID

USER DATA

Typical packet format

H5 P1 P3 P2

T4

T3

N3

H4 N2

T1

T2 H3

P2 P1 N1 P3 H1 H2 P1 P2 P3

N4

LINK ADAPTATION • Uses MCS - radio link quality. • Downlink- MS Uplink - BS

MODULATION USED • GPRS------------ GMSK.

• EGPRS---------- GMSK and PSK.

8-

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

SERVICES Services

GPRS

EGPRS

MMS Audio/Video Streaming Video Messaging File Downloads Video Telephony BEST FITTED TECHNOLOGY

MODERATE TECHNOLOGY

NOT AVAILABLE

CONCLUSION • EGPRS- the BETTER ONE

• FUTURE = EGPRS