Internet 2-Way Broadband Satellite

Transcript

Internet 2-Way Broadband Satellite
ICTP-Febbraio 2005
Ing. Stefano Zara
Project Manager & Technology Consultant
[email protected]
Property of Stefano Zara
Why satellite for TLC (1)
• Broad Satellite Coverages allow to extend the networks over
large areas well beyond the borders of each country
• Links independent from terrestrial infrastructure
and geological conditions
• Networks easily expandable:
adding a new site only implies to install a new terminal at the
site
• Reduced investment risk
Why satellite for TLC (2)
• Highly reliable:
terminal equipment and satellites are redunded
• Easy implementation of Multicast and Broadcast transmissions
• Satellite links are broadband and therefore allow high
information rates
Why satellite TLC (3)
• Satellite capacity (bandwidth) can be shared among all the
sites and assigned on demand
• Different satellite capacity can be assigned to forward and
return direction
• Connection price is independent from the distance
Eutelsat and Technology Development (1)
Eutelsat has always been at the forefront of
technology both for Satellites and for TLC Systems
Satellites
– Antennas: Combined Tx/Rx Beam Forming Networks,
gridded reflectors, shaped reflectors, Sunshields,
steerable/rotatable antennas, Ka-band multiple
beams
– Repeaters: Increasing TWTA powers, larger OMUX’s,
dielectric DEMUX’s, cooled LNAs
– Satellite platforms: Larger structures able to support higher
mass, increasing solar array power and battery
capacity
Eutelsat and Technology Development (2)
Eutelsat has always been at the forefront of
technology both for Satellites and for TLC Systems
TLC Systems
–
–
–
–
–
TDMA (DSTAR, DSAT)
SkyplexData
DVB/IP Multicasting
Bidirectional broadband network systems
DVB-RCS
Internet services: a platform for growth
• Internet & broadband services
Bi-directional Satellite communication Networks
Network Topologies: Star
with one hop on the satellite each node of the
network can access only the centre of the star.
To connect two nodes two hops are necessary.
Positive: Low cost Terminal (2 K€), small dimension,
Standard Multi-TXp-Multi-Satellite Network.
Negative: Double satellite latency, limited
upstreaming.
Bi-directional Satellite communication Networks
Network Topologies: Mesh
each node of the network can access all the other
nodes with only one hop on the satellite.
Positive: Single Satellite latency, higher bitrate
Streaming, Security
Negative: huge antenna and Power (so high cost 20K€)
…So? The Best?
Star Network
WAN
HUB
Star Multimedia Platform
The receive sites are equipped with transmit/receive
terminals connected to PC or LAN. The receiver of the
terminal de-embeds the IP contents of DVB/IP
channels transmitted from the satellite.
The transmitter of the terminal transforms the IP
stream in TDMA bursts that are transmitted via
satellite to the Hub station connected to the platform.
The position of the burst in the TDMA frame is given
by the hub.
Both Forward and Return Channels are broadband
Skylogic Dstar Network
W3A
AB1
Sesat2
W1
eBird
Data Centre
- AAA
- VPN
- Data Storage
- Push
- Streaming
- Scheduling
-Fast Internet
-Hosted/Housed servers
RF
DVB
IP/DVB
IP
MPEG-2
TS
PSTN/ISDN
PSTN/ISDN
RF
DVB
MPEG-2
TS
IP/DVB
IP
IP
HUB
Internet
Internet
COLT Data Centre
PARIS
TDMA
IP
TopIX
TopIX
Mesh Network
WAN
Mesh
Star
Ibrid
Mesh Networks: DAMA System
DAMA (Demand Assignment Multiple Access)
Systems
Based on MF-TDMA technology: each terminal
transmits and receives in TDMA bursts assigned ondemand by the Network Control Centre (NCC). Burst
duration is automatically changed according to
terminal needs and available capacity.
Evolution in Mesh Network: SkyplexData
SkyplexData
The terminals encapsulate the IP streams into MPEG2 streams and transmit them to the satellite. Skyplex
“On Board Processing” demodulates the SCPC
signals,multiplexes the contributions from all the
terminals and modulates a carrier which is retransmitted to all the terminals of the network. The
connections between the terminals are established on
the basis of PIDs and IP addresses.
DAMA System Layout
SkyplexData Layout
HOT BIRD 4 & 5& 6
SCPC/TDMA
Contributions
DVB -S Multiplex
Internet
MULTIMEDIA VIA SATELLITE
DIGITAL TV BROADCAST
CONTRIBUTION LINKS
SkyplexData vs Star System
With Skyplex
Small earth station
Central earth station
Eutelsat broadband services:
Eutelsat capacity with selected services
•
Broadband Internet
& multimedia
services
•
Broadband IP
services
Homes
One-way
services
Businesses
Two-way
services
•
Enterprise network
solutions
Two-way broadband solutions
4KEY APPLICATIONS
4KEY BENEFITS
– Broadband Internet access
– Premium quality Internet browsing
– Star data networks
– File multicasting
– Streaming services
– Return channels up to 2 Mbps
– Cost-effective broadband services
4KEY USERS
SMEs/SOHOs
Regional administrations
Two-way broadband solutions
4KEY APPLICATIONS
4KEY BENEFITS
– Broadband meshed networks
– Bandwidth-on-demand
– Videoconference services
– Rural telephony
– Maritime communications
– PSTN substitute
– Emergency networks
– Newsgathering & broadcasting
– Telemedicine
– Fully packaged solutions
– Scalable capacity
4KEY CUSTOMERS
Land-based communications
Maritime communications
Internet for Corporate
Internet (IP Network) for Corporate
Internet (IP Network) for Public Administration
Integration with VoIP
VoIP
VoIP
POTS
IP
Skylogic
Top-ix
Operatore
Integration with WiFI
WiFi
WiFi
Internet
Skylogic
Case History: Stromboli 1
• collegamenti
telefonici, video, di
teleconferenza e per
il monitoraggio da
remoto dal vivo
dell'evoluzione
dell'attività
vulcanica
Esempi Concreti: Stromboli 2
• Il sistema installato
ha permesso di
ripristinare i servizi
di telefonia, anche
durante le
interruzioni della
rete terrestre
causate dall'evento
in corso.
Esempi Concreti: San Benedetto Belbo 1
• Il progetto ha preso
la forma di un
accesso
centralizzato a
internet via satellite
nel Municipio di San
Benedetto Belbo, in
provincia di Cuneo
• Attraverso l’impiego della
tecnologia wireless, un ombrello
radio copre l’area abitata
garantendo così l’accesso a
banda larga a tutti i residenti
Servizi
Rete Wireless
Video sorveglianza
24h/24h
Web Site ufficiale del
comune
Edizione elettronica del
giornale locale
Sistema di video
comunicazione
Internet Point pubblico
•
•
•
•
•
•
La rete Wireless
5 Km quadrati di copertura Wi-Fi
#13 computer #3 WebCam
Standard 802.11b
11 Mbps di velocità
•
•
•
•
Progetto realizzato da Basedue,
distributore Skylogic, con
tecnologia bidirezionale D-Star
servizio IP Access Skylogic, oltre
all'installazione e alla configurazione
dei punti di accesso locali di tipo WiFi. Partner di Basedue, la società
Eye-Like, responsabile
dell'installazione di webcam per la
videosorveglianza, collegate
anch'esse in Wi-Fi, e della linea
servizi di tutti gli aspetti legali legati
al progetto.
Esempi Concreti: Macugnaga
•
Una soluzione analoga di
comunicazione satellitare con
monitoraggio video già fornita in opera
alla Protezione Civile sul Monte Rosa
durante l'intervento che ha riguardato il
lago Effimero, nei pressi di Macugnaga.
Esempi Concreti: prototipo S.Croce di Magliano
La rete Wireless di
S.Croce di Magliano
(Molise) realizzata
da AFA Sistems srl
Internet
MajorNet
Comune
Laboratorio informatico
“F.Trizzino”
Liceo Scientifico
Esempi Concreti: Elettromeccanica Adriatica
Cantieri
Temporanei
4 Centrali
Idroelettriche
Telecontrollate
HUB
Skylogic
Top-IX
Internet
PLC
GPRS
ISDN
Radio& Data
Mobile Network
Sede Centrale
NMS
Stabilimento Produttivo
DNS
SMTP
Notebook
Cache
Server
Telelavoratori
Esempi Concreti: Elettromeccanica Adriatica
• Accesso Internet
• Intranet tra sede centrale e stabilimento produttivo
• Telecomando e telecontrollo di centrali idroelettriche
remote
• DNS, SMTP, Cache Services
• Accesso remoto via GPRS, ISDN
• Prossima connessione Intranet di cantieri temporanei
Esempi Concreti: Dettaglio…
•
Il Server NMS controlla costantemente lo stato, le variabili
–
–
–
–
•
•
Produzione energia elettrica
Energia immessa in rete
Variabili di acquedotto
Statistiche e Log delle centrali idroelettriche remote
Le centrali remote inviano Traps a NMS
In caso di Trap “Severity: Critical”, il NMS
– Invia E-mail a indirizzo reperibile, notificata via SMS/GSM
– Tramite combinatore telefonico, manda 3 squilli a telefono reperibile
•
•
Il tecnico reperibile, si collega via GPRS a NMS in sede centrale e, via
satellite, accede a centrale remota
I telelavoratori accedono a Intranet via ISDN con possibilità di controllo
sicuro di centrali remote
Evolutions: TLC System Technology
Objectives of new developments of TLC Systems
• increasing the efficiency of communication links
• decreasing the price of the terminals
• simplifying the installation of the terminals
Increasing the efficiency of communication links
•
•
•
•
Modulation (8PSK, 16QAM)
Coding
Bandwidth management
Access mode
Decreasing the price of the terminals
• Satellite Spot Beam (high G/T) Antennas to enable
decreasing terminal antenna diameter and power
• Ka band technology
• On-board Processing for on-board signal regeneration
and dynamic cross connection between the beams
• Standardisation of the systems (DVB-RCS)
Simplifying the installation of the terminals
With the reduction of terminal prices, the installation
price becomes a non negligible percentage of the
investment.
• deployment and pointing of the antennas
• automatic terminal commissioning
• software downloading from the hub
Evolutions: New Applications
New Applications are a key factor in development of
networks. The customer is not interested in the
transmission technology: he looks for efficient and
low cost solutions to his problems.
Evolutions: New Applications
•
•
•
•
Among already developed applications:
Videoconference
tele-medicine
e-learning
content delivery
Evolutions: Network Integration
On-going projects
•
•
•
•
•
Integration
Integration
Integration
Integration
Integration
of
of
of
of
of
satellite
satellite
satellite
satellite
satellite
and
and
and
and
and
WIFI (done)
ADSL (done)
Digital terrestrial TV
2G, 2.5 and 3G
PLC

Internet 2-Way Broadband Satellite

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