EDGE: The Introduction of High Speed Data in GSM / GPRS ... · PDF fileEDGE: The Introduction of High Speed Data ... • EDGE & GPRS will use GMSK Modulation in low C/I areas,

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


Agenda

• What is EDGE?• Implementing EDGE• Network and transmission planning• The live experience …


Rev A 2


Agenda



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


Rev A 3


GPRS / EGPRS Protocol

BTS PCU

SGSN GGSNMS

Internet

GPRSGPRS Protocol

EDGETRU

MSEDGE EDGE Protocol No changes

SGSN GGSN


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”


Rev A 4


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)


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


Rev A 5


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


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:


Rev A 6


Agenda



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


Rev A 7


Agenda



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


Rev A 8


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


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


Rev A 9


Agenda



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


Rev A 10


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


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


Rev A 11


File Transferspeed at application level

~110 kbits/s


EDGE ...is easy to implement

increases both capacityand performance in GPRS networks

provides complementary coverage

takes GSM to one seamless network


Rev A 12


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


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

Documents

EDGE: The Introduction of High Speed Data in GSM / GPRS ... · PDF fileEDGE: The Introduction of High Speed Data ... • EDGE & GPRS will use GMSK Modulation in low C/I areas,