Presentation on theme: "Inmarsat - Products and Strategy"— Presentation transcript:
1Inmarsat - Products and Strategy Workshop on Satellite in IP and MultimediaGene Jilg, Chief Technology Officer
2Overview of Inmarsat Today Leading global mobile satellite communications service providerData and voice to maritime, land and aeronautical users23 years of market, technical and regulatory experienceEstablished in 1979 as an international co-operativeService on leased satellites beginning in 1982Satellite operator since 1990Privatised as a United Kingdom entity in April 19999 successful satellite launches (Inmarsat-2 and Inmarsat-3 fleets); all satellites still fully operationalMore than 260,000 registered terminals
3Current Portfolio of Services Circuit switched:Inmarsat-A: tel, fax, 64 kbit/s dataInmarsat-B (digital replacement to A)Inmarsat-M/mini-M: tel., fax, 2.4 kbit/s dataInmarsat Aero miniMInmarsat Aero I / H: tel., fax, 2.4 / 4.8 kbit/s dataInmarsat GAN ISDN: tel, fax, ISDN (64 kb/s 1B+S)Fleet 77/Swift 64 : tel, fax, ISDNMessaging/ Packet based, data services:Inmarsat-C: low bit rate S/F messagingInmarsat Aero CInmarsat-D/D+: two way paging systemInmarsat Aero L / H: 0.6 / 10.5 kbit/s packet data (X.25)Inmarsat E: distress alert service for maritimeInmarsat GAN MPDS: 64kb/s packet data over shared bearerFleet 77 (MPDS)
4Regional BGAN 144 kbps data services Via leased capacity on Thuraya satelliteAnchored at a SAS facility in Fucino (Italy)Air interface based on GSM adapted to satellite usageStandardised as GMR-1 by ETSI and TIA enhancing future interoperabilityMigration path to GPRS or UMTS PS serviceStrong resemblance to GSM in upper protocol layers allows integration of standard GSM services (SMS)R-BGAN has just completed acceptance testing, and is currently undergoing pre-operational trials and operator training. It is operated out of the Fucino earth station facility in Italy.The air interface has been developed and standardised with both ETSI and TIA, and draws heavily from GSM but with specific enhancements for operation over a satellite channel. This optimisation affects the lower protocol layers, with the upper protocol layers being extremely similar to GSM allowing the integration of current and future GSM services (such as SMS for example).This is a real R-BGAN user terminal, not a demonstration mock up, to give you an idea of the terminal size required to support up to 144 kbps operation. If anyone would like to see a live demonstration of the R-BGAN service, please see me at the end and I can arrange for this at Inmarsat HQ in the next couple of weeks.
6Regional BGAN Terminal User terminal looks and feels like a laptop, costs about $1100, receives and transmits at 144 kbps with end-user airtime charge around $11/MByte
7BGAN Improves upon performance of Regional BGAN Full ground segment diversity (Holland and Italian SASs)Voice and data services supportedHigher data rates (up to 432 kbps)Increased coverage (US, Europe, Far East)Two Inmarsat 4 satellites53 °W and 64 °E9 m L-band satellite antenna – generates 1° spot beamsFlexible DSP based payload, 630 dynamically assigned channels, digital beam forming200 kHz channelsThe BGAN service will improve on the performance of R-BGAN when it comes into service in 2004.This will add ground segment diversity, voice services, wider coverage and higher data rates. Additional user terminals will also be introduced (smaller and larger than the laptop size used by R-BGAN).Key to the performance of the system is a 9 metre deployed reflector antenna on the satellite capable of generating 1 degree spot beams at L-band, and the advanced DSP based payload and digital beam forming. Channels are switched between beams in multiples of 200 kHz, giving extremely high flexibility to focus resources in specific regions. Extensive frequency re-use is deployed to maximise capacity.
8Inmarsat-4 User Link : L Band Feeder Link : C Band Processed Band : 2 x 126 MHzSpacecraft Power : 12 kWLaunch Mass : 6 TonsSolar Array Span : 48 mPrime Contractor : AstriumMajor SubcontractorsTRW Astro, L Band ReflectorEMS, L Band FeedLaunchersAtlas VAriane 5
9L-band Beam PatternsThese bean plots should give you an idea of the type of coverage offered by BGAN.The map on the left shows an example deployment of the 1 degree Personal Mobile Cell (PMC) beams used to service the small BGAN terminals. Each beam is serviced by an integer number of 200 kHz channels, which are shared by the users present in the beam. As loading increases in a beam, additional channels are allocated to it dynamically.Not all beams are active at any time: some have no channels allocated at all. Procedures for ‘dark beam activation’ are supported by the system, to cover the first user to request service in any specific beam.The map on the right shows larger beams which are used to support Inmarsat’s Existing and Evolved services.