Internet 2-Way 2. Broadband Satellite. Ing. Stefano Zara. ICTP-Febbraio Project Manager & Technology Consultant szara@skylogic.

Transcript

1 Internet 2-Way 2 Broadband Satellite Ing. Stefano Zara Project Manager & Technology Consultant szara@skylogic.it ICTP-Febbraio 2005

2 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

3 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

4 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

5 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

6 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

7 Internet services: a platform for growth Internet & broadband services

8 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.

9 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?

10 Star Network WAN HUB

11 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

12 Skylogic Dstar Network W3A AB1 Sesat2 W1 ebird RF DVB IP/DVB IP Data Centre - AAA -VPN - Data Storage - Push - Streaming - Scheduling -Fast Internet -Hosted/Housed servers MPEG-2 TS RF DVB IP IP/DVB TDMA MPEG-2 TS PSTN/ISDN COLT Data Centre PARIS IP Internet IP TopIX HUB

13 Mesh Network WAN Mesh Star Ibrid

14 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.

15 Evolution in Mesh Network: SkyplexData SkyplexData The terminals encapsulate the IP streams into MPEG- 2 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.

16 DAMA System Layout

17 SkyplexData Layout HOT BIRD 4 & 5& 6 SCPC/TDMA Contributions DVB -S Multiplex Internet MULTIMEDIA VIA SATELLITE DIGITAL TV BROADCAST CONTRIBUTION LINKS

18 SkyplexData vs Star System With Skyplex Small earth station Central earth station

19 Eutelsat broadband services: Eutelsat capacity with selected services Broadband Internet & multimedia services Homes One-way services Broadband IP services Businesses Two-way services Enterprise network solutions

20 Two-way way broadband solutions 4KEY APPLICATIONS Broadband Internet access Star data networks File multicasting Streaming services 4KEY BENEFITS Premium quality Internet browsing Return channels up to 2 Mbps Cost-effective broadband services 4KEY USERS SMEs/SOHOs Regional administrations

21 Two-way way broadband solutions 4KEY APPLICATIONS Broadband meshed networks Videoconference services Rural telephony Maritime communications PSTN substitute Emergency networks Newsgathering & broadcasting Telemedicine 4KEY BENEFITS Bandwidth-on-demand Fully packaged solutions Scalable capacity 4KEY CUSTOMERS Land-based communications Maritime communications

22 Internet for Corporate

23 Internet (IP Network) for Corporate

24 Internet (IP Network) for Public Administration

25 Integration with VoIP VoIP VoIP IP POTS Skylogic Top-ix Operatore

26 Integration with WiFI WiFi WiFi Internet Skylogic

27 Case History: : Stromboli 1 collegamenti telefonici, video, di teleconferenza e per il monitoraggio da remoto dal vivo dell'evoluzione dell'attività vulcanica

28 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.

29 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

30 Esempi Concreti: San Benedetto Belbo 2 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 b 11 Mbps di velocità

31 Esempi Concreti: San Benedetto Belbo 3 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 Wi- Fi. 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.

32 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.

33 Esempi Concreti: prototipo S.Croce di Magliano Internet La rete Wireless di S.Croce di Magliano (Molise) realizzata da AFA Sistems srl MajorNet Comune Laboratorio informatico F.Trizzino Liceo Scientifico

34 Esempi Concreti: Elettromeccanica Adriatica Cantieri Temporanei HUB Skylogic Top-IX 4 Centrali Idroelettriche Telecontrollate PLC Internet Telelavoratori Notebook Stabilimento Produttivo GPRS ISDN DNS SMTP Cache Server NMS Radio& Data Mobile Network Sede Centrale

35 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

36 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 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

37 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

38 Evolutions: TLC System Technology Increasing the efficiency of communication links Modulation (8PSK, 16QAM) Coding Bandwidth management Access mode

39 Evolutions: TLC System Technology 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)

40 Evolutions: TLC System Technology 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

41 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.

42 Evolutions: New Applications Among already developed applications: Videoconference tele-medicine e-learning content delivery

43 Evolutions: Network Integration On-going projects Integration of satellite and WIFI (done) Integration of satellite and ADSL (done) Integration of satellite and Digital terrestrial TV Integration of satellite and 2G, 2.5 and 3G Integration of satellite and PLC