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CCSDS “ Space Link Services” Area

CCSDS “ Space Link Services” Area. Jean-Luc Gerner SLS Area Director ESA/ESTEC 11 April 2005. Joint Meeting of the CCSDS and the OMG-SDTF Athens, Greece, 11 April 2005. Spacecraft Onboard Interface Services. Space Internetworking Services. Mission Operations and Information

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CCSDS “ Space Link Services” Area

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  1. CCSDS “ Space Link Services” Area Jean-Luc Gerner SLS Area Director ESA/ESTEC 11 April 2005 Joint Meeting of the CCSDS and the OMG-SDTF Athens, Greece, 11 April 2005

  2. Spacecraft Onboard Interface Services Space Internetworking Services Mission Operations and Information Management Services Space Link Services Systems Engineering Cross Support Services Context: CCSDS Areas

  3. Charter and Scope of Area • Space Link Services address radio links: • Space Earth • Earth planets • Spacecraft spacecraft • Spacecraft planets landers, rovers, probes • Space Link Services include: • Radio Frequency and Modulation • Ranging • Channel Coding and Synchronisation • Telecommand & Telemetry Protocols • Data compression

  4. RF & Modulation WG Ranging WG Channel Coding & Synchronization WG LDPC Codes BOF Long Erasure Codes BOF Space Link Protocols WG Proximity Links WG Data Compression WG Working Groups and BOFs

  5. RF & Modulation WG, Ranging WG : Develop recommendations for modulation techniques to cover specific needs and constraints of space missions for C/C and payload TM links. Develop recommended high performance ranging techniques Achievements : Blue book covering RF & modulations techniques for both the low earth orbit and the deep space missions Ranging standard under construction Program of Work

  6. RF & Modulation WG, Ranging WG (products) : Program of Work Recommendations Technical Informations RF & Modulation S/C - Earth Stations Compat. Tests Bandwidth Efficient Modulations AVAILABLE BOOKS Proceedings Earth Stations Bandwidth Efficient Modulations RF & Modulation Novel Ranging Techniques IN PREPARATION update

  7. Channel Coding & Synchronization WG : Objectives : develop recommended channel coding and frame synchronization schemes to support all type of space links Status : Three blue books available : TM channel coding TC channel coding Proximity links channel coding Program of Work

  8. Low Density Parity Check Codes (LDPCC) BOF : Objectives : develop recommended coding schemes with high power and spectral efficiency, with low decoding complexity and with low residual frame and bit error rates for future high rate telemetry applications Status : requirements matrix and evaluation criteria are being finalized Program of Work

  9. Long Erasure Codes BOF : Objectives: develop recommended coding schemes for the specific case of potentially fading links (e.g. : Ka band links) Status : requirements analysis, survey of potential solutions Program of Work

  10. Space Data Links Protocols WG: Objectives: develop recommended framing and associated protocols schemes to provide data link layer functions for all types of space links Status : Three blue books available : TM space data link protocol TC space data link protocol AOS space data link protocol Program of Work

  11. Program of Work TC Sync & Channel Coding TC Space Data Link Protocol TM Sync & Channel Coding TM Space Data Link Protocol AVAILABLE BOOKS TM/TC AOS Space Data Link Protocol AVAILABLE BOOKS AOS ( International Space Station ) TM Channel Coding TC Channel Coding OverviewofSpace LinkProtocols TM Space Data Link TC Space Data Link IN PREPARATION

  12. Proximity Links WG : Objectives : develop bi-directional protocols for proximity links between spacecrafts and landers in the frame of planetary exploration Status : Build-1 recommendations available and covering : physical, coding & data link layers Build-2 under development to cover second generation of communication assets at mars Program of Work

  13. Proximity Links WG (products) : Program of Work AVAILABLE BOOKS Proximity-1 Prox-1 Physical Layer Prox-1 Coding & Sync Layer Prox-1 Data Link Layer Prox-1 Physical Layer Prox-1 Coding & Sync Layer Prox-1 Data Link Layer Prox-1 IN PREPARATION Updates

  14. Data compression WG : Objectives : develop an image data compression recommendation specifically suited to the on-board high rate and real-time image compression Status : . recommendation under final review, . associated green book being developed . reference software being validated . full set (recom., green book, software) should be available by end 2005 Program of Work

  15. Data compression WG (products) : Program of Work Lossless Data Compression Lossless Data Compression AVAILABLE BOOKS Image Data Compression Image Data Compression Image CompressionReferenceSoftware IN PREPARATION

  16. More information on the WG activities and products available at : Data compression : http://public.ccsds.org/sites/cwe/sls-dc/ Data link protocols : http://public.ccsds.org/sites/cwe/sls-slp/ RF & Modulation : http://public.ccsds.org/sites/cwe/sls-rfm/ Channel Coding : http://public.ccsds.org/sites/cwe/sls-cc/ More information

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