wireless network evolution tunisie télécom slaheddine maaref tunisie telecom itu/bdt arab regional...
TRANSCRIPT
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Wireless Network Evolution
Tunisie Télécom
SLAHEDDINE MAAREF
TUNISIE TELECOM
ITU/BDT Arab Regional Workshop on Wireless Network Evolution
Muscut Oman 3-5 May 2004
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Presentation outlines
1-Market envirenment2-Old Analog technologies used for rural wireless connectivity 3-Digital technologies used for rural
wireless connectivity4-conclusion
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Telecommunications is a key enabler of economic and social development of a nation Universal service is a particularly urgent issue for rural and remote communities
1-Market envirenment
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1-Market envirenment
– Today Internet access becomes as
essential as telephony
– New multimedia services and technological convergence are shifting the regulatory focus to UNIVERSAL ACCESS
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• Regulators are focusing on universal access
• Specific conditions are elaborated for rural
areas coverage on fixed network licences
• Operatores are looking for economic and effecient solutions to provide universal
service for rural and remote communities -
1-Market envirenment (Cd)
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2 - ANALOG WIRELESS TECHNOLOGIES
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2.1 Mono-channel & Bi-channel system
Principe : use a radio link to connect remote subscriber
moddule to the subscriber
equipement into the swich
Frequency : UHF / VHF
Range : UP to 40 km
-
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2.1 Mono-channel & Bi-channel system (Cd)
Applications : - isolated subscribers
- rural public phone - farm
- police - custom control
point
Service : basic telophony
-
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Station d'abonné (une
ou 2 lignes)
Interface analogique (2 fils)
Central téléphonique
UHF/VHF
2.1 Mono-channel & Bi-channel system (Cd)
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2-2 : Fixed Analog Cellular System
Priciple : use the analog cellular network to provide fixed
telephony serviceApplcations : connect isolated subscribers
located on the coverage area of the analog cellular Network
Frequency : 450 MHZ , 900 MHZRange : UP to 30km
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Service mobile
Service fixe
Station de baseCommutateur du réseau mobile
Terminal d’abonné radio
RTC
2-2 : Fixed Analog Cellular System (Cd)
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Common Standards used for Analog Cellular System
(*) AMPS (Advanced Mobile Phone System)
NMT (Nordic Mobile Télécommunications)
Origine Américain standard (1982)
Scandinavian Standard (1981)
Fréquency 900 Mhz 450 Mhz et 900 Mhz
Range 35 Km 40 Km (450 Mhz)
27 Km (900 Mhz)
2-2 : Fixed Analog Cellular System (Cd)
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• N-AMPS (Narrow Advanced Mobile Phone)
TACS (Total Access cellular System)
E-TACS (Extended Total Access Cellular
J-TACS (Japan Total Access Systeù
2-2 : Fixed Analog Cellular System (Cd)
Others Standards used for Analog Cellular System
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3 - DIGITAL WIRELESS TECHNOLOGIES
-
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3-1 : Point to Multipoint Radio System
Principe : Radio acces Network point to multipoint using wired
and/or wireless termination
- Frquency : 1.4 Ghz - 2.7 Ghz
- TDM technologies
- Range : 10 to 200 km
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Système de gestion de
réseau
Téléphone
Données bas débits
Interface Analogique/numérique
RTPC
Station centrale
FH(1,5 –> 2,7 GHz)
Station d'abonné
Données bas débits
Téléphone
Station d'abonné
Station d'abonné
Station Relais
Données bas débits
Téléphone
3-1 : Point to Multipoint Radio System (Cd)
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Applications : Connectivity of small villages
Services : Telephony
Data (narrow band)
Management of Priority for some subscribers
Emmergency call
Capacity - Base station : 500 subscribers
- Terminal station : micro station : 2-4 sub
large station : 128 sub
3-1 : Point to Multipoint Radio System (Cd)
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3-2 -Wireless local loop : WLL
Principle : using digital radio-acces to provide fixed
telophony service
Applications : connectivity of rural and suburban areas
Services : Telephony : All PSTN services Data : 64 kb/s and more
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Système de gestion
V5.2 ou Analogique
Station centrale
PSTN
Zone Suburbaine/Rurale
BSC
Terminal d’abonné radio
BS
Réseau de transport FH, FO ou cuivre
(xDSL)
Réseau de transport FH, FO ou cuivre
(xDSL)
Interface radio
3-2 -Wireless local loop : WLL (Cd)
Contrôleur de station de base + Station de base
Téléphonie
données
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3-2 -Wireless local loop : WLL (Cd)
Common Standards used for WLL
DECT (Digital Européean Cordless
Telecommunications)
CDMA (Code division Multiple
accès)
Origine Européen Standard (ETSI) Américain Standard
Fréquency 1880-1900 Mhz 450Mhz, 800 Mhz, 1.7-1.8 Mhz, 1.8-1.9 Mhz, 2.2-2.3,Mhz, 2.3-2.5 Mhz, 3.4-3.6 Mhz, 3.5-3.7 Mhz
Transmission AMRT/ DRT (Duplex à répartition temporelle)
CDMA
Range Up to 10 Km Up to 25 Km
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3-2 -Wireless local loop : WLL (Cd)
Common Standards used for WLL (Cd)
DECT (Digital Européean Cordless Telecommunications)
CDMA (Code division Multiple accès)
Capacity of BS (0.5 Er/Sub, GoS = 1%)
100 abonnés - 1 RF (omni) : 800 lignes
- 12 RF (2 RF*6 secteurs) :
7000 lignes
Data LL 64 Kb/s -LL (128 Kb/s)
-ISDN 2 B+D
-Accès asymétriques (512 Kb/s down link)
-Accès Ethernet
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3-3 : Fixed and /or Restricted GSM
- Principle : Using GSM Networks to provide fixed telephony ( or restricted mobility )
- Applications : Connectivity of rural areas
- Services : telephony : all GSM services
Data : - circuit : 9.6 kbps : - GPRS : 30-52 kbps
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3-3 : Fixed GSM (Cd)
Fixed GSM Terminal
BTS
BTS
BSC
MSC
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شكراMerci pour votre attention
Thank you for your attention
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WiFi-RadioLAN
Slaheddine MAAREFTunisia Telecom
ITU/BDT Arab Regional Workshop on“Wireless Network Evolution”
Muscat, Oman, 03-05 May 2004
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Our thanks are adressed to Tunisian
Frequency Agency (ANF) promoter and
manager of this pilot projet
ITU/BDT Arab Regional Workshop on“Wireless Network Evolution”
Muscat, Oman, 03-05 May 2004
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PLAN• WIFI Overview.• Applications of RadioLAN Technologies.• Définition of Hot Spot.• Standardization of RadioLAN Technologies.• Tunisian ANF pilot project• Tests & évaluation.• Commercial WiFi applications• Conclusion.
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WIFI Overview
• Wireless Local Area Network– Définition:
• Broadband Radio Network for interconnection of personnel data equipments (PC, lapTop, mobile terminal..) using high speed radio links.
– Dénominations :• WLAN : Wireless LAN• RLAN : Radio LAN• RLR: Réseau Local Radio
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Applications of RadioLAN Technologies
1. To built new LANs (entreprises, universities, library, private …).
2. To offer connectivity inside public areas, transit areas, .. (Hot Spot).
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What’s Hot Spot ?• Hot Spot is the area of coverage of Radio LAN
using the wireless standard 802.11 for Data transmission.
• Hot Spot to offer mobile high speed Data connectivity within the coverage area.
• Hot Spot usually implemented inside aéroports, hôtels, conférences centres, campus universitaires…
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RadioLAN Standardisation
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Coverage Range comparaison between 2,4GHz & 5GHz bandwidth at 15dBm
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Tunisian ANF pilot project
• OBJECTIVES :
• To be in line with CMR-03 recommandations.
• Try WiFi solution for Internet accès : Hot Spot.
• Learn about RadioLAN Technologies
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Deployement of the pilot project
• 3 Steps :
1. Technical Study : constraints & performances required .
2. Configuration & installation of équipements.
3. Tests & évaluations.
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Technical Study
• Constraints to be observed :
- Data Sécurity- Spatial Constraint : maximum couverage, minimum interférence- Technical Constraint : power connectivity (best place), Ethernet accèss.
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Constraint Spatial/Sécurity
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Data Sécurity
•Radio transmissions Possibility of interception.
•Solutions : Access contrôl :- Spatial : Coverage Range Mesurement & contrôl. - Access adresses Control.Sécurité protocole : WEP (Wired Equivalent Privacy).
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Configuration & Installation
– Installation of 2 RadioLANs inside 2 buildings located at 50m (ANF & Ministère des Technologies de la Communication et du Transport).
– Interconnexion of the two buildings using a bridge.
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Configuration & Installation(Cd)
– Installation & configuration of a Billing System to charge Internet connexion.
– Installation & configuration of a Network Management System
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WiFi Equipements for the pilot project
• Accès Points (5 for ANF building, 4 for Ministère building & 2 for interconnexion of the 2 buildings).
• Switchers (2 inside ANF building).
• Management & Billing system (2 SMB & 1 CMB).
• Portable terminals
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Management system (2 SMB & 1 CMB)
• SMB - On Site MultiBox :– Users Authentication– Sessions management – Accounting of connexion time
• CMB - Central MultiBox :– Data base management .– Validation of authentication request of SMBs– SMB’s management
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Network Topologie
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Access Point Configuration inside ANF building (Ethernet connexion)
Internet
SMB/ANF
AP
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Access Point Positions
AP3
AP1
AP2
Ground 1st Floor
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AP4
AP5
2d Floor 3d Floor
Access Point PositionsANF Building
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AP_TELMIN_3
AP_TELMIN_4
AP_TELMIN_2
AP_TELMIN_1
SMBTelmin
Access Point PositionsMinistère Building
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Directionnel antennas Installation
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Tests Évaluations
1- Radio Tests Results:
- Tested Signal Power : 15mW, 30mW, 50mW et 100mW.
- Data Speed : up to 5 Mb/s.
- Coverage Range : 15 to 25m.
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2- Sécurity Tests :
Intrusion Tests :- at radioLAN level- at serveurs( firewall….) level- at coding level.- at Authentication level.
Sessions management tests
Tests Évaluations (Cd)
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3-Operational Tests
System Administration :• Login Management.
• Access Point Management.
• VLAN Management.Network Coverage & handover.
4- Physical Tests– Mobile Terminals Mutuel Accès.
– Connectivity tests between servers : CMB, SMB1,SMB2.
Tests Évaluations (Cd)
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Common WiFi Applications• Case of « Hot Spot »
Integrated access service included in the package offered by the area manager (could be free of charge) : Aireport, Railway Station…
example : Wayport Network (USA) for hôtels information.
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Common WiFi Applications (Cd)
Access to ISPs
-Payement using credit card or prepaid card….
Mobiles opérators data access service using SIM card for authentication, charging...
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Conclusion• WiFi technologies are developping very fast offring
new facilities for terminal mobility.
• Private & Public operators are in compétition sharing this promising market.
• Development of advanced Standards : 802.11b802.11g to get higher speeds & better security.
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شكراMerci pour votre attention
Thank you for your attention