Wireless Solutions for Rural Connectivity

Tunisie Télécom

SLAHEDDINE MAAREF

TUNISIE TELECOM

ITU/BDT Arab Regional Workshop on Wireless Network Evolution

Muscut Oman 3-5 May 2004

Presentation outlines

1-Market envirenment2-Old Analog technologies used for rural wireless connectivity 3-Digital technologies used for rural

wireless connectivity4-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 telephonyNew multimedia services and technological convergence are shifting the regulatory focus to UNIVERSAL ACCESS

-

• 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)

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

-

Station d'abonné (une

ou 2 lignes)

Interface analogique (2 fils)

Central téléphonique

UHF/VHF

2.1 Mono-channel & Bi-channel system (Cd)

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

Service mobile

Service fixe

Station de baseCommutateur du réseau mobile

Terminal d’abonné radio

RTC

2-2 : Fixed Analog Cellular System (Cd)

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)

• 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

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

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)

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)

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

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

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

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

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)

Fixed GSM Terminal

BTS

BTS

BSC

MSC

3-3 : Restricted GSM (Cd)

BTS

BTS

BSC1

MSC

Allowed mobility for that Subscriber

All other cells are barred for that Subscriber

– Limited mobility option and rich set of value-added services when using mobile handsets

– Smooth migration to GPRS/EDGE enabling higher data rates and new services

– 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

Advantages of GSM for limited mobility solutions

3-3 : Fixed and/or Restricted GSM (Cd)

– 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 spreadQuick deployment and easy installationThe fixed GSM solution is capable of evolving to a full mobile solutionPre-paid (public phones & mobile pre-paid) 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

H UGHESNETWORK SYSTEMSA HUGHES ELECTRONICS COMPANY

Quantum-Direct

Station TerriennePers on al E arth S tatio n 50 00

H U G HE SNETWORKSYSTEMSAHUGHESELECTRONICSCOMPANY

HUGHES

NETWORK SYSTEMS

A HUGHES ELECTRONI CS COMPANY

Quantum-Direct

HUB

RTC

HUGHESNETWORK SYSTEMSA HUGHES ELECTRONICS COMPANY

Quantum-Direct

Stations terminales VSAT

Publiphone

Station multilignes

Station monoligne

IP

CONCLUSIONWLL (DECT) Accès GSM VSAT

Population Density Medium Low High (small area)

Applications & services

TéléphonyFaxData

TéléphonyFaxDataSMS (GPRS)

TéléphonyFaxDataMultimédia

Speeds Up to 70 kbits 9,6 Kbits Up to 45 Mbits

MobilityNo (limited) Yès

(Restricted/limited)

No

Coverage Range < 5 km <30 km Local

GoS (Compared to wired line)

Equivalent Less Equivalent

شكراMerci pour votre attention

Thank you for your attention