SATNAC 2003 10 September 2003
Rev A 1
Rev A SATNAC 200310 September 2003 1
EDGE: The Introduction of High Speed Data in GSM / GPRS Networks
Wendy FlorenceEricsson South Africa
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Agenda
• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …
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Rev A 2
Rev A SATNAC 200310 September 2003 3
Agenda
• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …
Rev A SATNAC 200310 September 2003 4
The The Abbreviation
GPRS = GPRS = GGeneral eneral PPacket acket RRadio adio SSystemystem
EDGE = EDGE = Enhanced Data rates for Global Evolution
EEGPRS = GPRS + EDGE modulationGPRS = GPRS + EDGE modulation
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GPRS / EGPRS Protocol
BTS PCU
SGSN GGSNMS
Internet
GPRSGPRS Protocol
EDGETRU
MSEDGE EDGE Protocol No changes
SGSN GGSN
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I
Q
(0,1,1)
(1,1,0)(1,0,1)
(0,0,0)
(0,0,1) (1,1,1)
(1,0,0)
(0,1,0)
I
Q
“1”
“0”
EDGE introduces a new modulation scheme …
Currently:GMSK Modulation
EDGE:8PSK Modulation
“1 bit per symbol” “3 bits per symbol”
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GPRS and EDGE: Basic Technical Parameters
GSM EDGE
Modulation GMSK 8-PSK / GMSK
Symbol rate 270 ksym/s 270 ksym/s
Modulation bit rate 270 kb/s 810 kb/s
Radio data rate per time slot 22.8 kb/s 69.2 kb/s
User data rate per time slot 20 kb/s (CS4) 59.2 kb/s (MCS9)
User data rate (8 time slots) 160kb/s 473.6kb/s
(182.4kb/s) (553.6kb/s)
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10
20
30
40
50
60
0
MC
S1
MC
S2
MC
S3
MC
S4
MC
S5
MC
S6
MC
S7
MC
S8
MC
S9
CS1
CS2
CS3
CS4
GMSK modulation 8PSK modulation
8.0
12.014.4
20.0
8.411.2
14.817.6
22.4
29.6
44.8
54.4
59.2kbps
GPRS EGPRS
EGPRS Coding Schemes
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0 10 20 30 5040 600 5 10 15 20 25 30 35 40C/I [dB]
EDGE versus GPRS link level performanceC/I distribution for 4/12 frequencyre-use with different loads
C/I [dB]
0
10
30
40
50
60
20
Thro
ughp
ut p
er T
S [
kbps
]
C.D
.F. [
%]
0
20
60
80
100
40
90% of the users 90% of the area
Assume even traffic distribution in cell
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EDGE application coverage comparison in a C/I limited system
GPRS
3dB
• EDGE & GPRS will use GMSK Modulation in low C/I areas, close to cell border.• Cell coverage is not affected by 8PSK Modulation technique
GPRS requires C/I of 10 db
EDGE requires C/I of only 7db !
To provide 12kbps/Ts throughput:
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Agenda
• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …
Rev A SATNAC 200310 September 2003 12
Overview of needed network modifications
New hardware, software and dimensioning
New software and dimensioning
New software
New dimensioning
Gi (IP)
Gn
Gr (MAP)GsGb
Gn
A
IPNetwork
Backbone
NetworkIP
SOGSOG
BGWBGW
A-bis
BSC/PCU
BSC/PCUBSC/PCU
BSC/PCU
A-bis
HLRBTSBTS
SGSNSGSN GGSNGGSN
MSC/VLRMSC/VLRBTSBTS
SGSNSGSN
HLR
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Agenda
• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …
Rev A SATNAC 200310 September 2003 14
BTS PCUBSC SGSN
GGSN
HLRAUC
MSCVLR
GbAbis
Um
R
GiGs GrA
Gn
Gc
DThroughput
per TS
# EDGE TRX
Applications and settings
Abisdimensioning
BSC capacity with EDGE TRX
PCU capacity for simultaneous
EDGE channels
Network Planning Issues
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Existing ornew network
Dimensioning Issues
Dimensioning of Radio Network
Voice capacityand quality
Data capacityper cell [kbits/s]
Throughput perPDCH [kbits/s]
MS class andcapabilities
Experiencede-2-e throughput
Reuse andspectrum
Configuration
# TRXs# ePDCHs# gPDCHs# bPDCHs
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50 40 30 20 1060
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
MCS8
MCS9
CS1
CS3
CS4
CS2
8.0
12.0
14.4
20.0
8.4
11.2
14.8
17.6
22.4
29.6
44.8
54.4
59.2
kbits/s 0 16 32 48 64 80
Transmission Planning
User data rate in the air A-bis data rate
voice
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Agenda
• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …
Rev A SATNAC 200310 September 2003 18
Field Tests with an Operator:
• Measured– Cell edge, C/I = 10 dB, 34.1kbps, 2TS– Max MCS9, 500kb file, C/I = 15dB, 78.4 kbps, 2TS
• Anticipated EDGE user data speed (with 4 DL time slots)– 80 to 130 kbits/s over 90% of cell– 150 to 200 kbits/s over 50 % cell radius
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Live EDGE Demos at Ericsson
Ericsson Experience Center
• Commercial SW and HW• 1900 and 1800 dTRU• Currently running demo with Nokia
6200 EDGE mobile (2 DL, 1 UL)• We show customer that EDGE is a
reality
What are we showing?
1. A PC is using EDGE terminal as modem for internet connection
2. Show data throughput on application layer3. Start streaming music (~20 kbits/s)4. Add streaming video news (~55 kbits/s)5. Add web browsing (~35kbps)6. FTP of large file (~110 kbits/s)7. Stream high quality music+video 8. Stream high quality movie clip
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Transfer speed at application level
~111 kbits/s
Freeware application showing application
throughput
Music Streaming~20 kbits/s
Streaming Video~35 kbits/s
Web browsing~55 kbits/s
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File Transferspeed at application level
~110 kbits/s
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EDGE ...is easy to implement
increases both capacityand performance in GPRS networks
provides complementary coverage
takes GSM to one seamless network
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EDGE Handsets Availability
2002 2003 20042002 2003 20042002 2003 2004
GSM/EDGE800/1900/1800Volumes
GSM/EDGE900/1800/1900Volumes
GSM/EDGE/WCDMAFirst Volumes
GSM/EDGE900/1800/1900
First
GSM/EDGE800/1800/1900
First
3 band or 4 band
GSM/EDGE800/900/1800/1900
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First announced EDGE devicesNokia 6220(with camera)
900/1800/19002+1 TS (DL +UL)
GA
Q3
2 00 3
Motorola T725
800/1800/19003+1 TS (DL +UL)
Nokia 6200
800/1800/19002+1 TS (DL +UL)
GA
Q2
2 00 2
Sony Ericsson(PC card)
800/900/1800/19004+2 TS (DL +UL)
GA
Q1
2 00 4