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Mobile Communications

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The ROBMOD Project

Robust Modulation & Coding for Personal Communications Systems

(ROBMOD), aimed at defining and validating a candidate approach for

the satellite component of 3rd-generation mobile system (S-UMTS)

Subcontactors:

Ascom(Switzerland), CoRiTel(Italy), IMST(Germany), Politecnico di Torino(Italy),

SquarePeg Comms Inc.(Canada), Universit Roma Tor Vergata(Italy)

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Main Outcomes Physical Layer Specifications: ESA submitted the ITU an S-UMTS

standardisation proposal for a CDMA-based access:

SW-CDMA: pure CDMA solution

S-CTDMA: CDMA/TDMA solution

Test Bed: comprehensive hardware facility representative of the SW-

CDMA physical layer. The Test Bed models a complete bi-directional

Gateway Terminalsatellite link, featuring:

multi-satellite diversity and satellite / spot-handoffs with coherent

combining channel simulation(path delay, Doppler, variable link attenuation,

user-defined propagation channel, etc.) including interference

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Test Bed

GW-side

applicationinterface

PLSE

NFSE

TBCE

GWISU

GWMU

GWDU

GW MODEMASSY

(GWMA)

TEST BED CONTROL ASSY (TBCA)

PIU MMIU

GWHCU

GWDIU

GWCCU

GW FUNCTIONSASSY

(GWFA)

MTISU

IMDU

MTDU

MTMU

MT MODEMASSY

(MTMA)

FLCSU

RLCSU

CHANNELSIMULATOR

ASSY

(CSA)

MTHCU

MTDIU

MTCCU

MT FUNCTIONSASSY

(MTFA)

DYNAMIC SIMULATOR ASSY (DSA)

DSPU DSMMIU

traffic + control / signaling path

control path

MT-side

applicationinterface

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ATB Project ESA contract Advanced S-UMTS Test Bed (ATB), aimed at defining and

validating solutions for the packet and the multicast mode is an S-UMTS

context. Contract develops over two Phases:

Subcontactors:

Alc atel Bell Space (Belgium), Alenia Spazio (Italy), Ascom

(Switzerland), RAI(Italy), SkySoft(Portugal), Telespazio(Italy)

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S-UMTS System Design Space Engineering is currently supporting Alenia Spazio in the

definition of an operational S-UMTS system

Two ESA contracts: S-UMTS Preparatory Activity(completed)

S-UMTS Bridging Phase(on-going)

Main Space Engineering involvement:

simulations for system capacity assessment

payload architectures (transparent, OBP, digital beam forming both

on-board and on-ground)

ground segment architectures Other team members:Accenture(Italy),Astrium(Germany), Elsacom

(Italy), Omnitel(Italy), Radiolinja(Finland), Telit(Italy)

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VIRTUOS Project

VIRTUOUSdemonstrates the first step of the migration path towards

UMTS, in which 3G users will still use 2G-compatible terminals

VIRTUOUSdemonstrator includes a real GPRS network and hardware-

emulated T-UMTS and S-UMTS access networks. Main Space Engineering roles:

system studies

implementation of both the T-UMTS and S-UMTS physical layers

Other Partners: Telespazio(coordinator, Italy),Ascom(Switzerland), EBA

(Italy), Siemens(Austria), Telefonica(Spain), Tilab(Italy), University of

Aachen(Germany), University of Rome La Sapienza(Italy)

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GAUSS Project

GAUSS aims at designing and demonstrating a realistic integrationconcept between navigation and communications systems adapted to

support the type of communications services being considered for

Galileo (i.e. bursty, packet-based services). Service demonstration will

be carried out over an existing satellite

Main Space Engineering role is:

to perform system studies

to contribute in the demonstrator access system implementation

to realize a digital receiver front-end common to COM and NAV Partners: Telespazio (coordinator, Italy), ARNI (Italy), Ascom

(Switzerland), Ericsson(Italy), GMV(Spain), Thales(France), Telefonica

(Spain), TTI(Spain)

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FUTURE Project Follow-on of VIRTUOUS, mainly intended to:

design a UMTS multimedia subsystem based on Session Initiation

Protocol (SIP), to offer real-time multimedia services. Implementation of

a SIP Client and a SIP Proxy, to support end-to-end Quality of Service

demonstration of "QoS guaranteeing functions", e.g. Connection

Admission Control (CAC) in a via-satellite context supporting

multicasting and packet services

Space Engineering involvement is the same as in VIRTUOUS

Partners: Telespazio(coordinator, Italy), EBA(Italy), Ericsson(Greece),

Integrasys(Spain), Siemens(Austria), Telefonica(Spain), University of Aachen

(Germany), University of lAquila(Italy)

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Other EC-funded Projects Two proposals are currently retained for final negotiation:

Project XXX : define and demonstrate, by means of a demonstrator

having both terrestrial and satellite access facilities, a mobile service

scenario encompassing location-based value-added services, rich

multimedia and Geographical Information (GI) contents

Project YYY: identify, design and demonstrate new services, upon an

integrated T/S-UMTS network. The software-based emulator of both

the Core Network and the Access Networks will permit to carry out a

Fully IP Based Core Network experiment and an Access NetworkResources Optimisation experiment

Space Engineering roles: system studies, simulations and

implementations