Transcript Wireless Broadband Access (WBA) - ITU

ITU/BDT Arab Regional Workshop on Wireless Network
Evolution
Tunisie Télécom
Muscut Oman 3-5 May 2004
WIRELESS
BROADBAND ACCESS
“WBA”
SLAHEDDINE MAAREF
TUNISIE TELECOM
SOMMARY
•Market Overview
•Definition
•Applications
•advantages
•WBA Technologies
•Tunisie Telecom WBA Project
•Comparative Study for Broadband Access :
Market overview 1
• Forcast on Bandwith Demand shows that all
users need more and more bandwith
• According to the « sophisticated »
multimidia applications they are using,
residential subscribers are asking for high
speed internet.
Market overview 2
• Tariffs for broadband services are
decreasing around the world.
• The boom of the broadband market is
coming.
• Operators have to prepare infrastructure to
face demands every where.
Market Overview 3
• Operators today problem : Availability &
Quality of Access Network
• xDSL technologies are not available and
suitable every where
• Deployment of xDSL technologies depends
on the quality and coverage of existing
wired network
Definition 1
Wireless Broadband Access (WBA) is a
new solution based on point to multipoint
radio distribution to provide broadband
access.
Definition 2
It comes as attractive and innovative
alternative for conventional broadband
connections based on traditional copper
links.
Definition 3
Wireless Broadband Access (BWA) is
used to provide broadband services
to suburban and remote users (Voice,
Data, High speed Internet).
Access Network
Wireless solution
 Internet et voix simultanés
Net Data rate: jusqu‘à 2 Mbps
2000 utilisateurs par station de base
Portée de 50 Kms
Router
Gateway
IP Network
IAP
Local
Exchange
PSTN
• Internet Access
Point
LOBBY
LOBBY
Wireless for telephony
• High quality voice with MOS > 4
• Fax G3 (14.4 Kbit/s)
• Modem V.90 (56 kbit/s)
• Bit error rate BER <= 10-4
• Pay phones
• Supplementary services
And for Internet....
•Débits allant à 512 Kbps
•Bit error rate BER <= 10-6
•Connection permanente
•Système transparent au
dessus de la couche 2
Téléphony & Internet
cellular configuration to got more
capacity
Typical applications of BWA
•Big enterprises managing important
telecommunication traffic such as Call
Centers located on suburban areas.
• Other Applications such as :
Internet Network Permanent Access
Multichannel video entertainment
programming (similar to land based
cable television).
Typical Network Architecture
Frame Relay
IP
LL
Ethernet 100 Base T
PSTN
RNIS
Interface V5.2
Station Centrale
Station de Gestion
Station de base &
Contrôleur de station de base
Typical Network Architecture (Cd)
Routeur
TCP/ IP
E1
Frame Relay
Terminale SU
Lignes
spésialisées
PABX
RTCP
RNIS
Interface V5.2
Station de base
E1
Routeur
Ethernet 10 Base T
Station de Gestion
LAN
Advantages of BWA
• BWA may be profitable compared to wired lines in
areas with low density
•Wireless network deployment is progressive :
Gradual deployement
minimum market risks.
•Time to market is shorter than wired network .
ITU/BDT Arab Regional Workshop on Wireless Network
Evolution
Muscut Oman 3-5 May 2004
Wireless Broadband Access
Technologies
Wireless Broadband Access
Technologies
LMDS technology
LMDS solution (Local Multipoint Distribution Service).
LMDS combines voice and data in order to offer a wide
range of broadband communication services.
LMDS system focuses first on Small and Medium
Enterprises.
LMDS Specifications
• IEEE Standard : 802.16.1
• Access type : OFDM
• Frequency :
– 27.5-28.35 GHZ
– 31.0-31.30 GHZ
• Bit rate : from 5 Mb/s to 1.25 Gb/s (with dynamic
allocation)
• Covering :
5km
• Services : voice, data ( Internet, LL, VPN, Frame
Relay, Broadcast,...).
Wireless Broadband Access Technologies (Cd)
MMDS Technology
• Microwave Multipoint Distribution System (designed to serve
small geographic area ).
• MMDS system focuses first on Small and Medium
Enterprises.
MMDS Specifications
• IEEE Standard : 802.16.3
• Access type : OFDM
• Frequency :
 2.1-2.2 GHZ
 2.5-2.7 GHZ
• Bit rate : from 3 Mb/s to 1 Gb/s
• range :
35km (with non line-of-sight).
• Services : voice, data ( Internet, LL, VPN, Frame
Relay, Broadcast,...).
Wireless Broadband Access Technologies (Cd)
W_CDMA technology
Multi-services broadband access network with
point-multipoint radio distribution using CDMA
access techniques.
W_CDMA to provide wireless connections up
to 1 Mb/s.
W-CDMA specifications
Access type : CDMA
• Frequency band :
– 3.4-3.6 GHZ
– 3.5-3.7 GHZ
• Bit rate : until 512 kb/s
• Couvering :
25km (with non line-of-sight
• Services : voice, data ( Internet, LL, VPN, Frame- Relay,
Broadcast,...).
Tunisia Telecom WBA
Projet
Objective
Network configuration
Scope of Projet
Project Objective
 Built a WBA network to provide the following services :
 Internet high speed access (up to 512 Kb/s down link, up
to 128 Kb/s up link).
 ISDN Accès (2B+D).
 Frame Relay Accès.
 LL Accès (64 Kb/s & 128 Kb/s).
 Voice sevices
Project Description
 Installation of :
 3 base stations BSs
 1 BSCs
 1 Central Station
 600 of Different types of Subscriber Terminal Equipement :
 1 Line high speed Internet asymétric + 2 Telephone Lines
 1 ISDN Line (2B+D).
 1 LL 128 Kb/s or 2*64 Kb/s.
 2 Téléphone lines
Project Description
Areas to be covered by WBA :
Zone South Hammamet
North suburbs of Tunis
South suburbs of Tunis (Ouardia)
Network Architecture
Frame Relay
IP
LL
Ethernet 100 Base T
PSTN
RNIS
Interface V5.2
Station Centrale
Station de Gestion
Station de base &
Contrôleur de station de base
Scope of projet
 400 High speed Internet (128 to 512 Kb/s for down link & 32
to 128 Kb/s up link).
 50 accès Frame Relay 64 & 128 Kbit/s
 50 accès LL 64 & 128 Kbit/s
 50 accès ISDN (2B+D)
 50 téléphone lines
COST COMPARAISON
WBA
<>
Wired ADSL
For suburban areas
• Cost calculation of ADSL wired access
Assumption
we use 4 km + 2 km (primary + secondary) of
undergrounded copper cable (0.6mm) to prvide
ADSL access for 20 suburban subscribers.
We use small capacity DSLAM & ADSL modem
Cost calculation of ADSL wired access (Cd)
Average cost of cable
(6km)
Cost of ADSL terminal
2500 dinars
100 dinars
Cost of one DSLAM
port
100 dinars
Total
2700 Dinars
 The average cost per ADSL wired access = 2700 DT
• Cost calculation of WBA_CDMA access
Cost of a small WBA
network (200 accèss)
Average cost of one WBA
500 000 Dinars
2500 Dinars
COST COMPARAISON
For suburban areas
WBA
<>
Wired ADSL
2500 DT < > 2700 DT
Conclusion
The optimal Broadband solution to
connect suburban users depends on
distanses (geographical distribution)
and number of subscribers.
The main advantages of WBA are time
to market and easy re-use.