Presentation Confidential between MTN and audience Deploying EDGE To Cost-Effectively Meet The Increasing Data Requirements Of Your Subscriber Base Wasiu Otukoya RF Optimization Manager MTN Nigeria Communications Limited March 2008 Presentation Confidential between MTN and audience
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Presentation Confidential between MTN and audience
Deploying EDGE To Cost-Effectively Meet The Increasing Data Requirements Of Your Subscriber Base
Wasiu Otukoya
RF Optimization Manager
MTN Nigeria Communications Limited
March 2008
Presentation Confidential between MTN and audience
Presentation Confidential between MTN and audience
MTN NIGERIA-BACKGROUND
• The biggest mobile operator in West Africa
•Commercial launch in August 2001
• 17 million subscribers and still counting
• 3500+ Base Stations and over 55,000 TRXs
•Uses 2 vendors on the BSS (Ericsson & Huawei) and one vendor (Ericsson) on the core network
•76% of Nigeria’s population and 70% of the area covered by MTNN GSM/GPRS network
Presentation Confidential between MTN and audience
AGENDA
• The evolution and status of EDGE in Africa
• Benefits of deploying EDGE for mobile operators
•
Technical requirements and costs of upgrading to EDGE for mobile operators
•Assessing the impact of deploying EDGE on QoS
and QoE
for voice and data services
•Examining the advantages of deploying EDGE in addition to 3G for
mobile operators
•The Future of EDGE: EDGE Evolution
•Summary
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EDGE DEPLOYMENT STATUS
290 networks in 136 countries worldwide deploying GSM/EDGE networks .
20 countries/31 networks deploy EDGE commercially in Africa. Other countries/networks have also made commitments to rollout.
Over 75% of GPRS operators upgrade to EDGE
148 WCDMA operators operating or deploying a combined EDGE-
WCDMA network
Over 700 GSM/EDGE user devices launched (mostly mid and high end
phones)
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AFRICA EDGE DEPLOYMENT STATUS
Source:www.gsa.com
S/N Countries Networks1 Algeria Djezzy;Nedjma
2 Botswana Mascom
Wireless
3 Cameroun Orange
4 Chad Tigo
5 D.R Congo Celtel, Tigo, Vodacom
6 Egypt Mobinil, Etisalat
Misr
7 Ghana MTN Ghana, Tigo, OneTouch
8 Cote D Voire Moov
9 Kenya Celtel, Safaricom
10 Liberia Libercell
11 Madagascar Telma
12 Mozambique Vodacom
13 Namibia MTC
14 Sierra Leone Tigo
15 Somalia Somafone
16 South Africa Cell C, MTN, Vodacom
17 Tanzania Celtel, Tigo, Vodacom
18 Tunisia Tunisiana
19 Uganda Celtel
20 Zambia Celtel
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NEED FOR EDGE DEPLOYMENT
EDGE is about enabling 3G Services to all data users
Web browsing Messaging E-mailPush-to-TalkGaming Mobile TVMusic download
This is in addition to supporting the services offered by existing GPRS network
Requires a software upgrade of the existing GSM/GPRS network
No new sites or new spectrum, and has no impact on existing cell or frequency plans.
Prolongs the lifetime of the multi-billion dollar legacy 2G infrastructure.
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BENEFIT OF EDGE-OPERATORS
EDGE provides operators a cost-efficient way to reach the mass market to boost the uptake of mobile data services.
EDGE is a viable alternative for providing Internet access in markets where fixed network infrastructure is yet to be established.
EDGE is an important complement to mobile broadband services delivered today over WCDMA/HSPA and in the future LTE networks.
EDGE enables new applications and greater network efficiency resulting in increased ARPU
EDGE provides smooth evolution of GSM/GPRS systems towards 3rd generation capabilities
Upgrading the GPRS network to EDGE will maximize ROI and subscriber loyalty.
Presentation Confidential between MTN and audience
BENEFIT OF EDGE-END USER
Improved quality of serviceIncrease data capacity and higher throughput, and lower response
time
Personal Multimedia ServicesAttractive EDGE compatible terminals now available
Lower Price Per BitLower cost of data capacity gives operators flexibility in pricing which will translate to lower price for the end user.
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EDGE DATA RATES
Figure 1. EDGE is four times as efficient as GPRS. GPRS use four
coding schemes (CS-1 to 4) while EDGE use nine Modulation and Coding Schemes (MCS-1 to 9).
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BASIC PACKET SWITCH NETWORK REQUIREMENTS
PS network integrated with CS network
Hardware components integrated with GSM Structure– PCU– SGSN–
GGSNTransmission on both PS and CS Data (No additional transmission capacity for CS1
& CS2 )
Feature activation on both BTS and BSC (depending on the vendor)
Packet Data Channels (PDCH) enables transmission of packet data over the air
interface
Fixed
On-Demand
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BASIC PACKET SWITCH ARCHITECTURE
GGSN ExternalIP
Network
SMS-G/IW MSC
HLR
BTS
SW + HW
SW
SWMS
BSC
New design BackboneNetw ork
Traffic & SignallingSignalling
SGSN - Serving GPRS Support NodeGGSN - Gateway GPRS Support NodeBTS - Base Transceiver StationBSC - Base Station ControllerMSC - Mobile Switching CentreHLR - Hom e Location Register
MSC/VLR
SW
SOG
BGw SW
SW
Gn
Gi
Gd
GrGb
Gs
Gn
SGSN
AUC
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EDGE REQUIREMENTS
EDGE capable MS/Data Cards
TRX capability/Radio Network Configuration
A-bis transmission requirements
Additional PCU requirements
Gb Interface Capacity
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TECHNICAL REQUIREMENTS FOR EDGE UPGRADE
G G S N E xtern a l IP
N etw o rk
S M S -G /IW M S C
H L R
B TS
S W + H W
S W +H W
M S B S C
N ew d es ig n B ackb o n e N etw o rk
T ra ffic & S igna llingS igna lling
S G S N - S e rv ing G P R S S upport N odeG G S N - G atew ay G P R S S upport N odeB T S - B ase T ransce ive r S ta tionB S C - B ase S tation C on tro lle rM S C - M ob ile S w itch ing C en treH LR - H om e Loca tion R eg is te r
M S C /V L R
S O G
B G w G n
G i
G d
G r G b
G s
G n
S G S N
A U C
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TRX CAPABILITY & RADIO NETWORK CONFIGURATION
EDGE capable TRX (hardware)General recommendation for an EDGE
cell–
EDGE timeslots defined on cells– 4+4+4 ETCH/Site–
FPDCH in hotspots–
5 or more ETCH in hotspots–
CHGR 1 for CS (Hopping)–
CHGR 0 for BCCH and PS-Might require an extra TRX/cell depending on levels of CS traffic
Presentation Confidential between MTN and audience
DEPLOYING EDGE: TECHNICAL REQUIREMENTS
PCU CAPACITY
Increased data traffic expected when EDGE is introduced
Additional RPP capacity is required. Each EDGE or CS 3/4 enabled
PDCH requires almost 3 times more RPP capacity than GPRS CS1/CS2.1 RPP supports max 150 BPDCH or 100 EPDCH.
PCU capacity can be enhanced by utilizing semi dedicated PDCH (SPDCH) on thePCU.For each Semi-Dedicated PDCH:–
1 Dedicated PDCH on TRX–
1 Dedicated Abis
TS–
1 On Demand GPH (RPP/PCU)
In addition to dimensioning, software upgrade will be implemented on the PCUto support EDGE
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Gb
INTERFACE CAPACITY
Gb
interface capacity has to redimensioned
to handle the additional requirements of EDGE
Gb
over IP
Why Gb
over IP and what does it offers us?
Saves PCU resources; no GPH required
Capacity on the Gb
interface not a limiting factor
CAPEX savings in transmission network and PCU
OPEX savings due to lower transmission and operational costs
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A-Bis
Interface Capacity
EPDCH takes 64K on the A-Bis
interface (4 times capacity required by BPDCH). Every ETCH is linked to a 64K timeslot on the A-Bis
interface.
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A-BIS CAPACITY –
OPTIONS AVAILABLE
Transmission Upgrades
Long Lead time
Capital intensive
A-Bis
transmission over IP
Utilises a low cost transmission medium (Ethernet/xDSL)
A-Bis
optimisation
Improves A-Bis utilization efficiency thereby removing the need for costly upgrades.
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A-BIS CAPACITY –
ABIS OPTIMIZATION
A-Bis
optimisation removes the need to upgrade existing transmission
Achieves bandwidth savings by removal of redundant information and packing of frames in both uplink and downlink.
Traffic and signalling information sent as LAPD frames on the super channels instead of dedicated timeslots on the A-bis interface.
Requires only additional BSC hardware (PGW) installation.
Achieves gains in excess of 40% for a typical 4+4+4 site. Lower gains with higher TRX configurations (1 E1 will be enough to support a 222/444 site compared with 2 E1 without A-bis optimisation.)
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A-BIS OPTIMIZATION
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ASSOCIATED COSTS
Capex
BTS Cost (cost of installing EDGE compatible TRUs
where necessary) $3,200/TRX
Complete swapout
of Micro RBS (where necessary) $25,000/RBS
EDGE software $350/TRX
Additional RPP Installation $4,800/RPP
A-Bis
Optimisation $60,000/BSC
Transmission Links Upgrade $36,000/radio
Site Acquisition Nil
Power & Air-conditioning Nil
Opex
Annual site rental cost Nil
Electric Power Nil
Transmission Nil
Maintenance Nil
Vendor Support Nil
Expected payback period 15 -
18 Months
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QoS
impact on Voice & Data Services
Reduced resource for CS Traffic
Grade of service (TCH congestion)
Additional TRUs
(TRU Upgrades)
Utilize HR codecs
(Increase capacity-negative impact on voice
quality)
Utilize AMR codecs
(Increase capacity without compromising
voice quality)
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Presentation Confidential between MTN and audience
RF QoS
Measures-
DATA
PDCH Allocation Success:
Successful allocation of required PDCH resources
PDCH Load Factor (#TBF/PDCH):
Indicates the number of simultaneous TBF in the downlink sharing the same PDCH resource. A high load factor has a negative impact on subscriber experience.
TBF Allocation Success: Successful allocation of TBF for downlink data transfer
EDGE (DL/UL) IP Throughput: Measure of the speed with which the BSS ship packet data to and from the users, provides the best indication of the user experience. Drawback of this measure is that it is affected by the class of handset and application level.
PDCH Pre-emption
: # active PDCH preempted / # attempts to allocated PDCH resource
TBF Pre-emption:# UL & DL TBFs preempted / # attempts to allocated PDCH resource
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Presentation Confidential between MTN and audience
RF QoS-
Measures –DATA (LGBSC2)
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EDGE –A COMPLEMENT TO 3G
Fast rollout thus enabling operators to offer 3G services while still rolling out the 3G networks.
Prolongs the lifespan of existing 2G infrastructure while still allowing operators to forge ahead with new technologies.
Provide instant nationwide “3G”
coverage with EDGE.
Seamless network enables transparency towards end user
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EDGE –A COMPLEMENT TO 3G
Allows operators to segment their market by using EDGE to provide services to low ARPU customers and 3G for high ARPU customers
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EDGE –A COMPLEMENT TO 3G
It will not be cost effective for operators to deploy 3G to some
rural areas across Africa. EDGE allows the occasional visitors from urban centres to still have good service while in rural areas.
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THE FUTURE -
EDGE EVOLUTION
EDGE Evolution
Standards defined in release 7 of the 3GPP standards.
EDGE Evolution will improve improve the user-experiencedperformance across all services by:
2 –
3 times increase in EDGE bit rates (peak bit rates of 1Mbps and
typical bit rates of 400Kbps)
2 –
3 times spectral efficiency gain (for voice & data capacity)
Reduce latency (Roundtrip time) to below 100ms.
All these will be achieved with low impact on the GSM/EDGE network
Requires extensive terminal modifications
EDGE Evolution functionality expected to be available in 2008
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SUMMARY
EDGE enables 3G applications over current GSM networks, and provides seamless services with 3G.
Complement to WCDMA and retain high end users.
CAPEX/OPEX associated with EDGE deployments can be minimized by taking advantage of latest features from OEMs
-
Semi Dedicated PDCH (SPDCH) on the PCU-
Gb
over IP-
A-Bis
over IP-
A-Bis
Optimisation
EDGE Evolution, currently being standardized in 3GPP, will further improve performance and makes it imperative for GSM operators worldwide, to upgrade to EDGE.
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