gprs vs edge
Post on 16-Nov-2014
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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
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