IP-VSAT BROADBAND INTERNET VIA SATELLITE

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Joanna Logan
7 years ago
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IP-VSAT BROADBAND INTERNET VIA SATELLITE BAGGI is a company based in Milan (Italy) who has been designing, installing, integrating and maintaining telecommunication systems since 1975.

Due to our success in Italy and abroad, our activity has expanded to other fields, that go beyond ISDN voice transmission and switching.

1 IP-VSAT BROADBAND INTERNET VIA SATELLITE BAGGI is a company based in Milan (Italy) who has been designing, installing, integrating and maintaining telecommunication systems since Initially we were dedicated to the cabling and installation of Time Division voice PABXes for medium and large enterprises; since the brand name VoicEvolution. Due to our success in Italy and abroad, our activity has expanded to other fields, that go beyond ISDN voice transmission and switching. Our company provides turn-key systems, designed according to the Customer s requirements, installed world-wide, certified according to the local regulations, delivered with the as-built documentation and with the possibility of training courses. The VoicEvolution IP-VSAT is a satellite based system of Very Small Aperture Terminal ground stations. This solution is optimized for interconnecting IP Local Area Networks (LANs) of corporate networks or governmental institutions. A typical application is the implementation of a broadband VPN (Virtual Private Network) for allowing highly secure voice/video/data connections between multiple sites, at reduced operational costs in comparison with traditional means of terrestrial network connection. TDSCS10603AR0_IPVSAT page 1

2 1 Introduction VSAT stands for "Very Small Aperture Terminal", this term refers to any small fixed satellite terminal that is used to provide interactive or receive-only communications. The VSAT comprises of two modules - an outdoor unit and an indoor unit. The outdoor unit consists of an Antenna and Radio Frequency Transceiver (RFT). The antenna dish size is typically from 75 cm to 2.4 m in diameter. The indoor unit functions as a modem and also interfaces with the end user equipment like PCs, LANs, Telephones or PABX. They are used for a wide variety of telecommunications applications, including corporate networks, rural telecoms, distance learning, telemedicine, disaster recovery, ship-board communications, transportable "fly-away" systems, and much more. VSATs are becoming increasingly popular, because they are a single, flexible communications platform that can be installed quickly and cost effectively to provide telecoms solutions for consumers, governments and corporations. They have been in use for more than 10 years and, with more than 500,000 systems operating in more than 120 countries, VSATs are a mature and proven technology. Among the many applications: SCADA (supervisory control and data acquisition), Point-of- Sale transactions such as credit cards, Internet Access, Voice-Over-IP, Bank transactions between headquarters and branches and any IP application. BAGGI VoicEvolution is an overall Solution Provider in the field of Telecommunications. Our company has been providing turn-key systems, designed according to the Customer s requirements, certified according to the local regulations and integrated by world-wide support. Hereafter are listed the offered Products and Services: Voice over IP (VoIP) solutions for small and medium enterprises. Cabling (either wire or fiber) for any telecom application, e.g. Triple Play services. Internet LAN/WAN (hubs, bridges, switches, routers, gatekeepers, gateways) Videoconference solutions (either ISDN or IP based) Remote e-learning Data Acquisition from sensors in industrial plants VoicEvolution complements its offer by delivering VSAT based solutions in the following applications: Broadband IP networks for LAN interconnections (VPN) with MPLS capability Videoconferencing, VoIP telephony and Fax over IP (Bandwidth on demand) Maritime communications Offshore oil platforms communications (in presence of potentially explosive atmospheres) Interactive Distance Learning (IDL) SCADA control and monitoring in the Oil and Gas industry (in presence of potentially explosive atmospheres) TDSCS10603AR0_IPVSAT page 2

3 2 VSAT System Architecture All the solutions proposed by BAGGI VoicEvolution follow the internationally adopted DVB-RCS open standard architecture for 2-way VSAT networking. A DVB-RCS VSAT network is a satellite-based communications system that provides interconnection between users who are exchanging real time (and non-real time) applications based on several data types (text, voice, images, video etc ). There are two transmission paths: the Forward Channel from the centralized Hub location to the satellite and then from the satellite to the remote location the Return Channel from the remote location to the satellite and then from the satellite to the central Hub. The DVB-RCS VSAT system underwent final standardization by the European Telecommunications Standards Institute (ETSI) in The standard calls for a forward link based on a DVB/MPEG-2 data format and a return link using Multi-Frequency Time Division Multiple Access (MF-TDMA) scheme, allowing a two-way exchange of data (refer to the figure). The DVB/MPEG-2 format carries from 1 Mbps up to 45 Mbit/s in the forward link and the MF-TDMA scheme allows from 64 kbps up to 4 Mbps per carrier. A revision of the DVB-RCS standard added support for the new DVB-S2 transmission standard, including adaptive coding and modulation features. All these advanced features are supported by the VoicEvolution solutions. The network consists of a central earth station Hub station, the communication satellite, and VSAT terminals at the remote sites. The DVB-RCS channel (Return Channel via Satellite), in MF-TDMA format, is the uplink channel from the remote terminal to the satellite and provides the remote user with a satellite based ADSL-style link without the need for the land based cables. The DVB-S channel is the outbound channel from the Hub. This forward link is shared among a population of terminals using either DVB-S (EN ) or the highly efficient DVBS2 standard (EN ). Adaptive transmission to overcome variations in channel characteristics (e.g., rain fade) can be implemented in both the forward and return links. Among the Protocols supported: TCP/IP, UDP/IP, IGMP, RIP1&2, IP QoS, VoIP. TCP acceleration is available. TDSCS10603AR0_IPVSAT page 3

4 The following diagram illustrates a typical application: an End-to-End VPN tunnel. This example arrangement provides end users security over the satellite link and over the Internet. The tunnel is established as soon as the Host wants to communicate with the Corporate Center. The unicast user traffic data is encrypted in both direction, the forward and the return links. The VoicEvolution solution comes with all the necessary IP devices, in addition to the antenna and the Radio Frequency components (Return Link Sub-System and Forward Link Sub-System): VPN server Firewall Router Ethernet switch Another widely used application is Voice over IP (VoIP) in a satellite environment. The VoicEvolution solution optimizes the handling of bandwidth-on-demand, jitter, latency and perception quality. With reference to the following diagram, the solution comprises all the necessary devices, including the media gateways and support for analog PBX. TDSCS10603AR0_IPVSAT page 4

5 3 Products BAGGI VoicEvolution is able to supply the following off-the-shelf components: Ku-band antennas (diameters from 0.9m to 3.8m) C-band antennas (diameters from 1.9m to 3.8m) Antenna mounts Feed systems Waveguides Satellite modems (Terminal Indoor Unit) Satellite routers (Terminal Indoor Unit) - including encryption and acceleration Ku-band Low Noise Block Down-Converter (Terminal Outdoor Unit) C-band Low Noise Block Down-Converter (Terminal Outdoor Unit) Ku-band Block Up-Converter (Terminal Outdoor Unit) C-band Block Up-Converter (Terminal Outdoor Unit) Power suppliers IP and PSTN equipments: Routers, Media gateways, Signalling gateways, Firewalls, IP PBX, ISDN PBX Field spectrum analysers Workstations and PCs for Network Management ATEX proof fixed and mobile telephone sets. Cable kits and tools Cabinets and Shelters (also for ATEX environments) 4 Services BAGGI VoicEvolution is a Solution Provider and a System Integrator in the Telecommunications field. Turnkey global network services are provided by highly qualified personnel and advanced technology, at competitive prices. It is a single source for satellite and VSAT hardware, installation material and system integration. The design of the network (star or meshed topology, satellite operator, security, redundancy, bandwidth) is carried out in close contact with the Customer. The site survey, civil works, power supply, signal and electrical cabling, terrestrial interconnections, local regulations, commissioning are all taken care by BAGGI. The Network Management software is provided on a centralized workstation or PC (SNMP protocol) with analysis of traffic measurements and statistics for system optimization. Remote technical support and expedited spares shipment are available worldwide. Due to the long time experience in data acquisition for the Oil & Gas industry, BAGGI offers also VSAT terminal equipments and sensors able to operate in the potentially explosive atmospheres of Oil rigs and offshore platforms, for either SCADA or VoIP applications. 5 Benefits Summarizing, one of the main benefits of choosing BAGGI VoicEvolution for establishing a satellite IP network is to have a single interface that solves a myriad of technical issues (power, frequencies, cable loss, flange types, climatic environments, local infrastructures and regulations) to achieve Customer s satisfaction. TDSCS10603AR0_IPVSAT page 5

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