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Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS (Satellite Data Link System) SYSTEM PRESENTATION ICAO ACP Working Group C - Toulouse October 2003 ACP WGC6/WP19
Reproduction interdite © Alcatel Espace Reproduction forbidden PRESENTATION PLAN PART I - INTRODUCTION & CONTEXT PART II - SDLS SYSTEM DESIGN PRESENTATION PART III - PROJECT STATUS AND WAY FORWARD
Reproduction interdite © Alcatel Espace Reproduction forbidden PART I - INTRODUCTION & CONTEXT
Reproduction interdite © Alcatel Espace Reproduction forbidden An Agreement of Co-operation has been signed and one task is to progress the definition of a Next Generation Satellite System The European Space Agency and Eurocontrol are co-ordinating their effort SDLS a CANDIDATE to NEXSAT INITIATIVE
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS AND NEXSAT CONTRIBUTIONS Eurocontrol and ESA associate their effort to develop a New Generation Aeronautical Satellite System
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS MISSIONS SDLS Definition SDLS is as a potential Next Generation Aeronautical Communication System SDLS Missions as specified in Eurocontrol Mission Requirement Document, in line with Nexsat initiative Complement the VHF communication system in Europe Support datalink applications deployment in dense Airspace World-wide coverage / Regional deployment capabilities Supports communications needs on remote and oceanic airspace Interoperable / Open architecture
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS GENERAL CONCEPT Safety dedicated system (ATS and AOC communication) Operation in protected radio-spectrum band ( L-band AMS(R)S ) Network security through clearly segregated system Controlled network with Guaranteed Performances Low cost infrastructure and operational cost Light and easy to install terminal Omnidirectional antenna Mono-Transmission Channel terminal Based on up-to-date communication technology Compatible to proven Bent-pipe Geostationary satellites Distributed network implementation capability (reduced ground network infrastructure) Capability for low cost GES implementation (in Ku band) Optimised network architecture (Spectrum efficiency)
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS SERVICES Services supported : ATM services (Services link2000+) AOC services (including support of ACARS) Critical Short data services Voice services (Point to Point, Party Line)
Reproduction interdite © Alcatel Espace Reproduction forbidden QUALITY OF SERVICE DATA SERVICES VOICE SERVICES
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS HIGH LEVEL SPECIFICATIONS Basic raw data rate 5.6kbps over dense areas (regional spot beams) Reduced raw data rate 3.2kbps over oceanic and remote airspace (global beams) BER : 10 -5 for data, 10 -3 for voice - Link availability 99.99 % QoS management
Reproduction interdite © Alcatel Espace Reproduction forbidden PART II - SDLS DESIGN PRESENTATION
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS DESIGN PARADIGMS Direct Sequence Code Division Multiple Access System (DS-CDMA) + Geostationary bent-pipe satellites Advantages of this configuration : Cancellation of Near-Far limitation of terrestrial CDMA systems Cancellation of frequency guard bands due to AES Doppler Cancellation of time guard with TDMA/CDMA configuration Resistance to interference, multipath and fading (scintillation..) Other by-products of interest : Supports decentralised access scheme Security at radio transmission level
Reproduction interdite © Alcatel Espace Reproduction forbidden WAVEFORM (Results of optimisation studies) CDMA Access mode Similar waveform on forward and return links Synchronous/Quasi Synchronous CDMA scheme alignment spec.1/8 of a chip Reference carriers for synchronisation and power control Asynchronous transmissions limited to GES and AES network entries Modulation QPSK with pulse shaping Spreading : Gold codes with a spread factor of 127 (BW=1MHz) Single Data/Voice Channel Coding : Turbo code with rate 1/2 Eb/No=2.6dB (256 bits blocks)
Reproduction interdite © Alcatel Espace Reproduction forbidden BASIC AES CHARACTERISTICS Design target : low cost SATCOM terminal (i.e. similar to a VHF radio). Basic Terminal Mono-transmit channel terminal with 30W HPA operated at saturation Omnidirectional antenna (0dBi at 5°, G/T -25dB/K) Include all the protocol stacks Supports Arinc 429 or Arinc 664 Interfaces Terminal Option AERO-I/H existing terminals supported (better EIRP-G/T figures) Up to 22kbps (4 times basic rate) could be provided
Reproduction interdite © Alcatel Espace Reproduction forbidden Current LINK BUDGET - MOBILE LINK
Reproduction interdite © Alcatel Espace Reproduction forbidden Possible Data Rate Improvement on future platforms
Reproduction interdite © Alcatel Espace Reproduction forbidden ACCESS - CARRIER DISTRIBUTION Forward CDMA carriers GES A Generic Distribution T CHANNEL TTTTT...T AES2 AES3 AES4 AES1 A Generic Distribution A CHANNEL Ad Ar Ad... Ad AES2 AES3 AES4 AES1 Collision AES1 and AES3 C Dedicated Return Carriers shared by several AES (Except voice multiplexed carriers) T T T A A C T A n 1 8 CDMA Codes 2 AES1 AES2 AES3 AES4 Common ASYNC CDMA shared by all AES (Spread-ALOHA). Log-on purpose (L channel) P and C AES AESx
Reproduction interdite © Alcatel Espace Reproduction forbidden ACCESS - CARRIER DEFINITION Typical payloads / bursts P, T, C : 150 bytes (Long Block Data Unit) A :Ar : 32 bytes (Short Block Data Unit) Ad : 8 bytes (Super Short Block Data Unit)
Reproduction interdite © Alcatel Espace Reproduction forbidden Network Architecture Paradigm Optimised Satellite Gateway
Reproduction interdite © Alcatel Espace Reproduction forbidden Gateway vs. Transparent Example SDLS Gateway Model Transparent Network Model Satellite Link Optimised Interface Network Dependent Interface Protocol Overhead reduction Minimal retransmissions Channel efficiency optimisation Flow control
Reproduction interdite © Alcatel Espace Reproduction forbidden QoS Management
Reproduction interdite © Alcatel Espace Reproduction forbidden Supported Diversity Schemes SDLS Design can be instantiated with diversity schemes at several levels : AES : Two patch antenna to avoid masking 2Rx / 1 Tx terminal 2Rx / 2 Tx terminals GES : GES site diversity in Ku band the feeder links to remove rain attenuation effect (up to 10dB) Satellite : Two satellites in hot redundancy
Reproduction interdite © Alcatel Espace Reproduction forbidden System Expandability SDLS is fully scalable. Minimal Configuration Operation in a single spot with one control and traffic station NMS/GES Multi GES Many GES can be instantiated in the system Transparent introduction allowed by the CDMA structure of the system Multi Frequency Slots Expandability by steps of 500/1000KHz on the same transponder Multi Spots On the same satellite, several spots can be used simultaneously Only one Network Master Station required for all spots Multi Satellite All system expansions are transparent to the Avionics
Reproduction interdite © Alcatel Espace Reproduction forbidden PERFORMANCE FIGURES (I) SDLS Traffic and capacity assumptions (from Eurocontrol ref.) Capacity assessment per aircraft
Reproduction interdite © Alcatel Espace Reproduction forbidden PERFORMANCE FIGURES (II) Initial Simulation Results Hypothesis & Modelling Queuing Analysis based on Markov models One GES configuration / One spot beam PIAC of 2000 aircrafts Preliminary Results Short Priority 2 (QoS3) Priority 3 (QoS4 & 5) Long* FD W RT Short Long* P P P P Ar T T PTPriority 1 (QoS1 & 2)4,41<4,5 s 3,30 6,71 7,65 12,29 <27 s <7,2 s Transit Delay (sec) * Long packets imply to make a reservation on A channel
Reproduction interdite © Alcatel Espace Reproduction forbidden PERFORMANCES (III) Summary Table : Total number of CDMA channels (PIAC 2000 aircrafts) Number of CDMA channels 1 GES configuration 15 GES configuration* Forward P channels 2730 Return A channel TBD Return T channel 1315 Total number TBD *Uniform PIAC AES distribution among 15 GES
Reproduction interdite © Alcatel Espace Reproduction forbidden COST FIGURES (I) SDLS Service Unit Costs: Results for Data Cost Hypothesis : Space capacity lease from 1 to 2M/year/MHz/39dBW
Reproduction interdite © Alcatel Espace Reproduction forbidden COST FIGURES (II) SDLS Service Unit Costs: Results for voice Cost Hypothesis : Space capacity lease from 1 to 2M/year/MHz/39dBW
Reproduction interdite © Alcatel Espace Reproduction forbidden PART III - PROJECT STATUS
Reproduction interdite © Alcatel Espace Reproduction forbidden EXPERIMENTATION STATUS Slide 1 : Initial Feasibility study Slice 2 : SDLS Demonstrator Baseline system qualified in July 2002, with : SDLS Network elements : NMS - GES - 2 AES SDLS Test Bed : set ATS and AOC applications SDLS Demonstrator Extension under completion : System Qualified on ESA Artemis Satellite (September 2003) Second Access Station deployed in Rome (November 2003) Slice 3 : SDLS Operational system study On-going SDLS Experimentation Plan for next phase include : Performance test bench development (transmission and network simulations) Real life test based on SDLS Demonstrator (with embarked tests)
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS SLICE 3 - WBS Experimentation Service Analysis Detailed Studies Economic Analysis System Consolidation
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS SLICE 3 : STUDY PHILOSOPHY Future SATCOM Solution SDLS feasibility analysis and technical solutions User needs Analysis, Service Requirements Making top-down and bottom-up approaches converge AccessProtocolsWaveform Solutions & Trade-Offs
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS SLICE 3 STUDY OVERVIEW Indra (SP) Schlumberger Sema (SP) Airtel (Ir) Skysoft (P) Vitrociset (I) Thales ATM (F) Alcatel Bell (B) AlcatelSpace
Reproduction interdite © Alcatel Espace Reproduction forbidden Slice 3 : Operational System Study Status Core studies have been conducted Services and QoS figures defined Baseline system architecture defined Studies currently on-going with short term results expected Transmission : Alternative spreading/scrambling schemes performance evaluation Envelope variation minimisation through complex scrambling Code reuse between spot using scrambling TCM-8PSK evaluation (bandwidth reduction) Reduced spreading option analysis in 500kHz bandwidth Network Architecture : Access performance refinement Gateway stack definition and performance refinement System consolidation activity on-going Outputs : System Design Concepts Justification File System Functional Specification
Reproduction interdite © Alcatel Espace Reproduction forbidden OPEN ISSUES & WAY FORWARD Consolidation of Mission Requirements with Eurocontrol Performances Verification Simulation models to be developed to confirm preliminary results network/protocol efficiency, capacity, QoS compliance system availability refinement (scintillation effects…) Safety assessment Safety analysis to be performed Security requirements Functions linked to security management could be included in the design if required (authentication / crypto /..) Experimentation Leverage existing system demonstrator to validate system key features (access diversity, gateway prototyping, environmental tests including in-flight demonstrations)
Reproduction interdite © Alcatel Espace Reproduction forbidden SDLS 2004 - 2005 2004 2005 System Prototype SDLS Demonstrator Pre-Operational System SARPS/MOPS D Pre-Operation SDLS Phase B Completion SDLS Phase C Flight Test Experimentation SDLS Slice 3 2003 CDR PDR NexSat Initiative Contribution to ICAO MRD V1 Users Steering Group STANDARDISATION DEVELOPPEMENT EXPERIMENTATION MRD V2 System Specification
26 Nov 2002 NexSAT Steering Group meeting 1 SATELLITE DATA LINK SYSTEM (SDLS) AN AERONAUTICAL MOBILE SATELLITE COMMUNICATION SYSTEM CONCEPT RESPONDING.
SATELLITE DATA LINK SYSTEM (SDLS)
Satellite Digital Multimedia Broadcast system : a new tool for Public Protection Disaster Recovery B. MARTIN Workshop.
DESIGN OF A SPECIFIC CDMA SYSTEM FOR AIR TRAFFIC CONTROL APPLICATIONS UNIVERSIDAD DE LAS PALMAS DE GRAN CANARIA UNIVERSIDAD POLITÉCNICA DE MADRID.
Phillipe Renaud and Nikos Fistas
Service Technique de la Navigation Aérienne NexSAT: Mission Hypothesis 20 may, 2003 STNA/31 ATM issues at horizon 2015 over ECAC Capacity: - VHF spectrum.
ATN Air-Ground Subnetworks
Space Time Processing for Fixed Broadband Wireless A. Paulraj Gigabit Wireless & Stanford University ISART 6 -8 September, 2000 Boulder, CO.
ESA Iris Programme: status
Presented by Philippe Renaud
CDMA X RTT Overview. Global 3G Evolution.
1 WP2: Communications Links and Networking – update on progress Mihael Mohorčič Jozef Stefan Institute.
Slide 1 NEWSKY – NEtWorking the SKY for aeronautical communications Michael Schnell, Sandro Scalise German Aerospace Center (DLR) Institute of Communications.
Presentation to Nexsat steering group - 20 / 05 / 03 Tous droits réservés © Alcatel Space All rights reserved SDLS Current Activities Presentation to NexSat.
NexSAT SG#7 9 th March 2006 Future Communications Infrastructure Jacky Pouzet Communication Domain manager European Organisation for the Safety of Air.
ATN ‘99, London, 23 September 1999 David Russell ATS Market Manager, SITA AIRCOM SITA AIRCOM Data Link Service.
Which telecommunication service is better for you?
Overview. UMTS (Universal Mobile Telecommunication System) the third generation mobile communication systems.
CDMA X EV-DO by S.Vidhya. CDMA 2000 CDMA2000 (also known as C2K or IMT Multi ‑ Carrier (IMT ‑ MC)) is a family of 3G mobile technology standards,
Next Generation SATCOM
IEEE 15.4k k J. Schwoerer (France Telecom) – N. Dejean (Elster)) Slide 1 Project: IEEE P Working Group for Wireless Personal Area.
Future Communications Roadmap
Wireless Communication Arjav A. Bavarva Dept. of Electronics and Communication.
Welcome to the launch of the Steering Group for a Next Generation Satellite System (NGSS) Eurocontrol, Brussels 26 November 2002.
Multiple Access Techniques for Wireless Communication FDMA TDMA CDMA SDMA PDMA.
8 June 04NexSAT Steering Group Fourth Meeting 1 SATELLITE DATA LINK SYSTEM (SDLS) TOWARDS A DEDICATED MOBILE SATELLITE COMMUNICATION SYSTEM FOR A/G SAFETY.
Legacy Satellite Systems
Introduction to MS-Aloha R. Scopigno, Networking Lab – 1.
1 SATELLITE NETWORKS 이 은 진. 2 Contents Introduction Polling ALOHA FDM(Frequency-Division Multiplex) TDM(Time-Division Multiplex) CDMA(Code.
IMT 2000, CDMA x And Future Trends. IMT 2000 objective. CDMA x. IMT 2000 Technological Options Brief Outline Migration Paths.
VDL Mode 4 Performance Simulator (DLS enhancements) presented by EUROCONTROL Montreal, 26 October 2004.
GSC: Standardization Advancing Global Communications Evolution of TD-SCDMA China Communications Standards Association (CCSA) Chicago, May 29th to 2nd June,
WIDEBAND CODE DIVISION MULTIPLE ACCESS & THE CAPACITY IN CODE DIVISION MULTIPLE ACCESS Presented by Maheshwarnath Behary Assisted by Vishwanee Raghoonundun.
Autumn2004 © University of Surrey SatComms A - part 4 - B G Evans 4.1 Satellite Communications A Part 4 Access Schemes in Satellite Networks -Professor.
20 May 03NexSAT Steering Group Meeting 1 SATELLITE DATA LINK SYSTEM (SDLS) TOWARDS A DEDICATED MOBILE SATELLITE COMMUNICATION SYSTEM FOR A/G SAFETY COMMUNICATIONS.
Bluetooth Techniques ECE 591. Overview Universal short-range wireless capability Uses 2.4-GHz band Available globally for unlicensed users Devices.
Tony Naaman Systems Architecture iDirect, USA
Integrated information and telecommunications solutions AIRCOM Implementation VHF Digital Link Presented by Philip Clinch to ATN 2001 Conference 19 September.
Multiple Access Techniques for wireless communication
SMART ANTENNA SYSTEMS IN BWA Submitted by M. Venkateswararao.
CDMA xEV-DO Overview Version The evolution to CDMA2000 1xEV-DO.
CSCI 465 Data Communications and Networks Lecture 6 Martin van Bommel CSCI 465 Data Communications and Networks 1.
EE578 Assignment #5 Abdul-Aziz.M Al-Yami November 8 th 2010.
GSM & CDMA A comparison. GSM Time Division Multiple Access Based Technology 200kHz bandwidth per carrier Deployed in reuse pattern 3/9, 4/12, 7/21 Available.
Multiple Access Protocol ผศ. ดร. อนันต์ ผลเพิ่ม Asst.Prof.Anan Phonphoem, Ph.D. Computer Engineering Department.
1 Presented by Mike Shorthose Helios Technology Ltd Chamberlain House High Street Bagshot Surrey UK VDL Mode 4 Overview and development status.
Sharif University of Technology Physical layer: Wireless Transmission.
Aeronautical Ku-band Satellite Communication Single Focus Workshop 25 March 2010 Peter Lemme.
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