Transcript Wireless Solutions for Rural Connectivity - ITU

Tunisie Télécom
ITU/BDT Arab Regional Workshop on Wireless Network Evolution
Muscut Oman 3-5 May 2004
Wireless Solutions for
Rural Connectivity
SLAHEDDINE MAAREF
TUNISIE TELECOM
Presentation outlines
1-Market envirenment
2-Old Analog technologies used for rural
wireless connectivity
3-Digital technologies used for rural
wireless connectivity
4-conclusion
1-Market envirenment
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
Today Internet access becomes as
essential as telephony
New multimedia services and
technological convergence are shifting
the regulatory focus to UNIVERSAL
1-Market envirenment
(Cd)
• 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 -
-
2 - ANALOG WIRELESS
TECHNOLOGIES USED
FOR RURAL
CONNECTIVITY-
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
2.1 -Mono-channel
& Bi-channel system
(Cd)
Applications : - isolated subscribers
- rural public phone
- farm
- police
- custom control point
Service
: basic telophony
2.1 Mono-channel
& Bi-channel system
(Cd)
Interface analogique (2 fils)
UHF/VHF
Station
d'abonné (une
ou 2 lignes)
Central téléphonique
2-2 : Fixed Analog Cellular
System
Priciple
: use the analog cellular
network to provide fixed
telephony service
Applcations : connect isolated subscribers
located on the coverage area of
the analog cellular
Network
Frequency : 450 MHZ , 900 MHZ
Range
: UP to 30km
2-2 : Fixed Analog Cellular System
(Cd)
Service fixe
RTC
Commutateur du
réseau mobile
Terminal
d’abonné radio
Service mobile
2-2 : Fixed Analog Cellular System
(Cd)
Common Standards used for Analog Cellular
System
Origine
Fréquency
Range
(*) AMPS (Advanced
Mobile Phone System)
NMT (Nordic Mobile
Télécommunications)
Américain standard
(1982)
Scandinavian Standard
(1981)
900 Mhz
450 Mhz et 900 Mhz
35 Km
40 Km (450 Mhz)
27 Km (900 Mhz)
2-2 : Fixed Analog Cellular System
(Cd)
Others Standards used for Analog Cellular
System
• N-AMPS (Narrow Advanced Mobile
Phone)
 TACS (Total Access cellular System)
 E-TACS (Extended Total Access
Cellular
 J-TACS (Japan Total Access Systeù
-
3 - DIGITAL WIRELESS
TECHNOLOGIES USED
FOR RURAL
CONNECTIVITY
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
3-1 : Point to Multipoint Radio System
(Cd)
Interface Analogique/numérique
Téléphone
FH
(1,5 –> 2,7 GHz)
Données bas débits
Station
d'abonné
Téléphone
Données bas débits
Station centrale
Station
d'abonné
RTPC
Station Relais
Téléphone
Données bas débits
Système de
gestion de
réseau
Station
d'abonné
3-1 : Point to Multipoint Radio System
(Cd)
Applications : Connectivity of small villages
Services
Capacity
: Telephony
Data (narrow band)
Management of Priority for some subscribers
Emmergency call
- Base station
: 500 subscribers
- Terminal station : micro station : 2-4 sub
large station : 128 sub
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
3-2 -Wireless local loop : WLL
(Cd)
Interface radio
Téléphonie
Station centrale
Système de
gestion
Réseau de transport
FH, FO ou cuivre
(xDSL)
Terminal d’abonné
radio
BSC
V5.2 ou
Analogique
BS
Contrôleur de station de
base + Station de base
données
PSTN
Zone Suburbaine/Rurale
3-2 -Wireless local loop : WLL
(Cd)
Common Standards used for WLL
Origine
Fréquency
Transmission
Range
DECT (Digital Européean
Cordless
Telecommunications)
CDMA (Code
division Multiple
accès)
Européen Standard (ETSI)
Américain Standard
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
AMRT/ DRT (Duplex à
répartition temporelle)
CDMA
Up to 10 Km
Up to 25 Km
3-2 -Wireless local loop : WLL
(Cd)
Common Standards used for WLL (Cd)
DECT (Digital
Européean Cordless
Telecommunications)
Capacity of BS (0.5
Er/Sub, GoS = 1%)
Data
CDMA (Code division
Multiple accès)
100 abonnés
- 1 RF (omni) : 800 lignes
- 12 RF (2 RF*6 secteurs) :
7000 lignes
LL 64 Kb/s
-LL (128 Kb/s)
-ISDN 2 B+D
-Accès asymétriques (512
Kb/s down link)
-Accès Ethernet
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
3-3 : Fixed and/or Restricted GSM
(Cd)
Frequency : 900 Mhz , 1800 Mhz , 1900 Mhz
Range
: up to 35 km
3-3 : Fixed GSM (Cd)
MSC
BSC
Fixed GSM
Terminal
3-3 : Restricted GSM (Cd)
MSC
BSC
1
All other cells
are barred for
that Subscriber
Allowed mobility for
that Subscriber
– Limited mobility option and rich set of valueadded services when using mobile handsets
– Smooth migration to GPRS/EDGE enabling
higher data rates and new services
3-3 : Fixed and/or Restricted GSM
(Cd)
Advantages of GSM for limited mobility solutions
– Proven, very mature technology
– Large range - up to 35 km in an open rural
environment
– High spectrum efficiency for voice services
– Excellent & stable coverage/capacity ratio
– Smooth migration to GPRS/EDGE
enabling higher data rates and new
services
– Limited mobility option and rich set
of value-added services when using
mobile handsets
For rural and suburban areas, wireless
solutions are less costly than wired when
subscribers are spread
Quick deployment and easy installation
The fixed GSM solution is capable of evolving
to a full mobile solution
Pre-paid (public phones & mobile prepaid) for all users through the same IN
platform
3-4 Rural connectivity using V.SAT System
Principle :
provide fixed telophony & Data
services using satellite links
Applications : connectivity of wide rural areas
with very low density
Services : Telephony : All PSTN services
Data
: Circuit switching n*64 kb/s
: Packed switching : Ethernet
3-4 Rural connectivity using V.SAT
System
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CONCLUSION
Population Density
WLL (DECT)
Accès GSM
VSAT
Medium
Low
High (small area)
Téléphony
Fax
Data
Téléphony
Fax
Data
SMS (GPRS)
Téléphony
Fax
Data
Multimédia
Up to 70 kbits
9,6 Kbits
Up to 45 Mbits
No (limited)
Yès (Restricted/limited)
No
Coverage Range
< 5 km
<30 km
Local
GoS (Compared to wired line)
Equivalent
Less
Equivalent
Applications & services
Speeds
Mobility
‫شكرا‬
Merci pour votre attention
Thank you for your attention