1 Space Link Services Area report to CESG/CMC Darmstadt, Germany, 9 October 2007 J.L. Gerner / G. Moury

SLS AREA REPORT CONTENTS A.CURRENTLY ACTIVE WGs AND BOFs WITHIN AREA B.SUMMARY TECHNICAL STATUS OF EACH WG & BOF C.INTRA & CROSS-AREA TECHNICAL ISSUES D.OTHER ISSUE AND CONCERNS E.PROPOSED AREA RESOLUTIONS / ACTION ITEMS

SLS AREA REPORT A.CURRENTLY ACTIVE WGs AND BOFs WITHIN AREA 1. RFM WG 2. RNG WG 3. TCC WG 4. C&S WG 5. SLP WG 6. LEC BOF 7. HRU WG 8. MHDC WG

SLS AREA REPORT B. SUMMARY TECHNICAL STATUS OF EACH WG & BOF

SLS AREA REPORT RFM WG & RNG WG

B.SUMMARY TECHNICAL STATUS 1.RFM WG Goal: Review of SFCG-26/27 and WRC-07 decisions affecting B; White-1 recommendation on 22 (the band near 22 GHz), 26 GHz modulation; White recommendations on 32 GHz modulation, and on 2 GHz modulation for Moon missions; Pink A/B, and Red companion recommendations; draft revised G ready for approval by CESG; pre-draft revised G. SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 1.RFM WG Working Group Summary Situation: No SFCG-26/27 decisions affecting B; WRC-07 not expected to affect B; White-1 recommendation on 26 GHz modulation; No work done yet on 22 GHz; Blue recommendation on 32 GHz modulation; No work done yet on 2 GHz modulation for Moon missions; Pink A/B, and pink companion recommendations; White draft revised G to remain in WG awaiting pink ; silver status for G. SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 1.RFM WG Working Group Status: Active Working Group Summary Situation: status:OKCAUTIONPROBLEM comment:Good progress SLS AREA REPORT

1.RFM WG Resolve 1: raise recommendations A/B, B and 2.6.8B to blue status; Resolve 2: initiate agency review of pink recommendations 2.2.3, and A/B; Resolve 3: retire G to historical status; Resolve 4: approve revised charter (deletion of 412 updating activities). SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 2.RNG WG Goal: issue Red Book on novel ranging techniques by November 2007 Working Group Status: Active Working Group Summary Situation: status:OKCAUTIONPROBLEM comment:Good progress AREA REPORT

2.RNG WG Working Group Summary progress: Current status: –PN Ranging White Book Issue 2.1 reviewed; –Regenerative channel sections completed; –Transparent channel sections expected to be finalized by April Decisions: –Agreed White Book Issue 2.2; –Do not publish Red Book on regenerative channels only. Future work/charter: –Red Book due April 2008 instead of November 2007; –Green Book proposed by April 2009; –Resolve 1: for approval of RNG WG charter update. SLS AREA REPORT

TCC WG C&S WG LEC BOF

B.SUMMARY TECHNICAL STATUS 3.SLS-TCC: Telecommand Channel Coding WG (1 of 2) Goal: Development of a Telecommand Channel Coding Green Book. Working Group Status: Suspended. Working Group Summary Situation: Working Group Summary progress :  See next slide status:OKCAUTIONPROBLEM comment: Task Accomplished SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 3.SLS-TCC: Telecommand Channel Coding WG (2 of 2)  Original goal was achieved. Working Group Summary progress:  In Heppenheim the WG supported the High Rate Uplink (HRU) WG Meeting Working Group Future:  The TCC WG is closed.  HRU coding activities will be dealt with in the C&S WG Resolve 1: Closure of TCC WG SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 4.SLS-C&S: Coding & Synchronization WG (1 of 5) Goal : - Issue TM Channel Coding GB - Issue new codes experimental (orange) book(s) Working Group Status: Active Working Group Summary Situation: Working Group Summary progress :  See next slide status:OKCAUTIONPROBLEM comment:X SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 4.SLS-C&S: Coding & Synchronization WG (2 of 5)  Original goal for publication of Telemetry Channel Coding Green Book achieved in the past. Working Group Summary progress :  Orange Book on LDPC Codes by GSFC & JPL ( merged version ) :  Updated version published.  Orange Book on ESA SCCC: published.  CNES Orange Book for Telemetry Frames over DVB-S2. Updated Draft provided. Resolution to publish the book. [DVB- S2 Copyright issues to be investigated (G.Lesthievent will contact ETSI/DVB and ask for free use of the Cnes Orange Book)] Way to proceed to be discussed at CESG SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 4.SLS-C&S: Coding & Synchronization WG (3 of 5) Working Group Summary progress : Joint activity performed with SLP for CRC clarification issues (shared topic: Coding expertise needed for Books under SLP responsibility). Remarks: CRC is used in several books (e.g. TC, TM, Prox-1).  ESA draft pink sheets presented and discussed with minor improvements. Resolution  Submit the following Pink Sheets to Agency Review [after fulfilling an ACTION (ESA) to Introduce notation C* for received frames]:  CCSDS = TM SPACE DATA LINK PROTOCOL  CCSDS = AOS SPACE DATA LINK PROTOCOL  CCSDS = TC SPACE DATA LINK PROTOCOL  CCSDS = SPACE PACKET PROTOCOL (addition, not improvement) [This book needs also a Technical Corrigendum for APID issues] SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 4.SLS-C&S: Coding & Synchronization WG (4 of 5) Working Group Summary progress : ESA draft pink sheets presented and discussed with minor improvements also for CCSDS = PROXIMITY-1 SPACE LINK PROTOCOL- CODING AND SYNCHRONIZATION SUBLAYER Resolution : Pink sheet SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 4.SLS-C&S: Coding & Synchronization WG (5 of 5) Working Group Summary progress :  Follow up for the future: Ensure consistency among all blue books using CRC. The material on CRC issues on e.g. techniques, performances, reference code, etc. be collected for updating (CRC parts of) TM/TC Green Books. SLS AREA REPORT

4. C&S Current+Future Work Items (1 of 2) Support Publication, RID Review and Approval of CRC Pink Sheets (4 +1 books) Update of the TM Channel Coding Green Book for –CRC clarifications (ESA) [TC Green Book too?] –Convolutional Codes clarifications (JPL) CCSDS Proximity-1 Space Link Protocol-coding And Synchronization Sublayer was published in April 2003  Five Years Review due. Recommended to perform review and correct some inconsistencies. Check consistency wrt actual implementations. Eventually, verify correctness of related Green Book CCSDS G-1 Proximity-1 Space Link Protocol-rationale, Architecture, and Scenarios B.SUMMARY TECHNICAL STATUS

High Data Rate Randomizer: Study will be started by ESA/ESOC –Impact on TM Channel Coding Green Book –Possible adoption of additional randomizer (i.e. impact on Blue Book[s]) High Rate Uplink Coding: task is likely to come from finalized report of HRU WG (TBC). Support to Proximity-2 Working Group (TBC) 4. C&S Current+Future Work Items (2 of 2) B.SUMMARY TECHNICAL STATUS

6.SLS-LEC: Long Erasure Codes (‘tornado codes’) BOF (1 of 2) Goal: Make, if conclusive, a proposal for the creation of a WG on application of long erasure-correction codes. BOF Status : Active (extended till end of 2007) BOF Summary Situation: Working Group Summary progress:  Technical progress positive.  Future: see next slide status:OKCAUTIONPROBLEM comment: work completed SLS AREA REPORT

B.SUMMARY TECHNICAL STATUS 6.SLS-LEC: Long Erasure Codes (‘tornado codes’) BOF (2 of 2) Working Group Summary progress:  Work finalized in this meeting.  Difficulties in having right perception by other Areas felt. This is an important issue since the implied coding solutions would penetrate also into higher layers data structures (e.g. post –pass recovery of “erased” frames or packets).  Cross-Area presentation has been held. Design ideas of LEC solutions have been presented addressing both:  Approach at Frame level (i.e. constant length input data)  Approach at (Space/CFDP) Packet level (i.e. variable length input data).  Next steps depends on CESG/Agencies decisions.  SLS PROPOSAL TO CREATE A LEC WG. LEC BOF TO PRODUCE A CHARTER SLS AREA REPORT

HRU WG SLP WG

7. High Rate Uplink WG Goal: Address Agency high rate uplink requirements from the IOAG. Provide technical recommendations in the areas of RF&Modulation, Coding, and Link Layer protocols in support of the Lunar Exploration Missions and extension to deep space. WG Status: Active X Idle ____ WG Summary Situation: Good progress. status:OKCAUTIONPROBLEM comment:Good progress SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

7. High Rate Uplink WG (cnt’d) WG Summary progress: Discussion on current uplink requirements and constraints presented by Matt Cosby/Victor Sank. Fabrizio Pollara provided an update to the performance characteristics of LDPC codes for use on the uplink. General discussion on how this WG should parcel out assigned tasks related to HRU to the RF&MOD WG, Coding & Sync WG, and Space Link Protocols WG. SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

7. High Rate Uplink WG (cnt’d) Problems and Issues: Ensure that the future work needed to augment the aging CCSDS Telecommand recommendations (BCH code, TC frame, etc) with more advanced coding, modulation, and link layer protocols be allowed to proceed SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

7. High Rate Uplink WG (cnt’d) Planning : ESA to deliver a Mission Profiles White paper to the WG by 15 January, 2008 describing the future new requirements for uplink. NASA to provide inputs for this white paper as well. Same date. Fabrizio Pollara (NASA/JPL) to deliver a CCSDS White book on uplink coding. One chapter for high rate and one chapter for low rate before the Spring 2008 meeting. Charter to be updated SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

5. SLS-SLP WG Goal: Progress Overview of Space Communication GB to next version. Progress Space Data Link Protocol draft GB to a Green book. Progress Space Packet Protocol draft GB to Green book Generate Encapsulation Service pink sheets for Fill Packet. Also include Technical Corrigendum for AOS and TM Space Data Links with respect to Fill Packet. APID definition resolution WG Status: Active X Idle ____ WG Summary Situation: status:OKCAUTIONPROBLEM comment:Good progress SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

5. SLS-SLP WG (cnt’d) SLS-SLP Summary progress: Takahiro Yamada answered the questions concerning: Draft Space Data Link Protocol GB (delivered at this meeting) Overview Space Communications protocol GB (delivered at this meeting) Space Packet Protocol GB ( due a few weeks after this meeting) Encapsulation Service pink sheets covering Fill packets to be added by Greg Kazz/Marjorie Delandelong. Also pink sheets to Fill packet sections of AOS and TM will also be provided to Secretariat. Changes presented by Gian Paolo Calzolari on resolving the APID definition in the SPP were accepted by the Working Group. Pink sheets to be produced. SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

5. SLS-SLP WG (cnt’d) Problems and Issues: No other additional problems or issues. SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

5. SLS-SLP WG (cnt’d) Planning : Provide pink sheets to Encapsulation Service Provide Pink sheets to AOS and TM Space Data Link Protocols Provide all 3 GBs to CCSDS Secretariat Provide Pink sheets for Space Packet Protocol SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

5. SLS-SLP WG (cnt’d) Resolutions : 1)Request again that the a) Space Data Link protocol Version 1.0 GB and b) Space Data Communications Protocol Version 2.0 GB and c) Space Packet Protocol GB Version 1 be published as green books on the CCSDS web site. 2)Request that pink sheets be circulated for agency review on the Fill packet description for the Encapsulation Service 3)Request that pink sheets be circulated for agency review on the APID definition for SPP BB 4)Request that pink sheets be circulated fro agency review on the fill packet and CRC definition for AOS and TM SDLP SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

SLS AREA REPORT MHDC WG

8. Multispectral & Hyperspectral Data Compression (MHDC) WG Goals: Establish selection criteria and requirements matrix for lossless and lossy compression standard(s). Establish a set of test data for testing and evaluation of candidate compression algorithms. Evaluate candidate algorithms Develop recommendation together with supporting information (simulation software, test data sets, and Green Book). Working Group Status: Active X Idle ____ Working Group Summary Situation: status:OKCAUTIONPROBLEM comment:very good progress SLS AREA REPORT B.SUMMARY TECHNICAL STATUS

8. MHDC WG (con’t) WG Summary progress: Established requirements matrix Established selection criteria Collected several data sets for testing & evaluation; Identified four additional data sets to be added Discussed concept papers for candidate compressors from CNES, ESA, NASA, CSA New members: Zhongwei Zhang (CAS), Rodney Grubbs (NASA MSFC) Participated in Motion & Imagery Applications BOF (SIS) Discussed likelihood of standardizing lossless compressor before lossy compressor; “one-size-fits-all” solution appears unlikely SLS AREA REPORT Problems and Issues: None B.SUMMARY TECHNICAL STATUS

8. MHDC WG (con’t) Planning : Evaluate candidate approaches - May 2008 Select approach for standardization - October 2008 White Book - January 2009 Red Book - May 2009 Reference software & compliance data sets - May 2009 Blue Book - October 2009 Green Book - October 2009 SLS AREA REPORT Resolutions : None. B.SUMMARY TECHNICAL STATUS

SLS AREA REPORT C. INTRA & CROSS-AREA TECHNICAL ISSUES  Wireless BOF Refocused on intra-satellite links  Time code BOF  Requirements to be submitted by agencies (Jan 08)  Reported by SEA

SLS AREA REPORT D. OTHER ISSUES 1.FUTURE PLANS 2.NEW BOFS

1. Future Plans  Mission Profiles SLS AREA D. OTHER ISSUES

Mission Profiles  Preparing for the future. Targets need to be clearly identified  Need for top-down approach: identify requirements  SLS proposes to develop a white book on profiles that are not satisfied with current CCSDS BBs  The white book will be a living document (moving targets)  New Future Mission Profiles BOF to be discussed at Spring 2008 meeting  Following slides : examples mission profiles not fully covered with current SLS books SLS AREA 1. Future Plans D. OTHER ISSUES

Relay Satellite Mission Profiles - Moon B C High Rate Uplink High Rate Downlink High Rate Uplink High Rate Downlink Prox-1 / Prox-2 HRU HRD PROX SLP C&S RFM 22GHz 26GHz

High Rate D/L L1/L2 Mission Profiles – Deep Space & Quasi-Deep Space Mars HRD SLP C&S RFM 32GHz 26GHz 32GHz

Mission Profiles – Near Earth High Rate D/L SLP C&S RFM High Rate Uplink HRU HRD 8/26 GHz 2 GHz

SLS AREA  Authentication Protocol BOF 2. New BOFs D. OTHER ISSUES  Optical Modulation & Coding BOF

Authentication / Encryption (1/3) SLS AREA  Security WG is almost ready to output two recommended practices :  authentication algorithm  encryption algorithm  No work on TC authentication or encryption protocol scheduled in security WG  Strong demand from commercial S/L operators for standard TC authentication protocol  SLS & SEA area should tackle this work item

Authentication / Encryption (2/3) SLS AREA  Objectives (1/2) :  develop TC authentication protocol (based on TC space data link protocol)  involve in the process TT&C knowledgeable persons from security WG  capitalize on solutions developed for dual-use missions (like Galileo, Pleiades-HR, …) since TC authentication protocol is very safety critical

Authentication / Encryption (3/3) SLS AREA  Objectives (2/2) :  create a BOF with 3 work items :  review the authentication and encryption algorithms red books  gather operational requirements for TC security protocol  establish charter for WG (or specify work item to be added to SLP WG charter)  M. Cosby (QinetiQ/BNSC), given his background in secure TC links, could lead this work item ?

Optical Mod & Coding BOF  Goals  Develop a table of optical mission profiles  Develop baseline requirements for the forward error correction (FEC) coding and modulation needed for each mission profile  Establish charter for OMC WG  Schedule  Spring White paper on application profiles.  Fall Report on baseline requirements validated by at least two agencies.  Spring If enough interest has been generated, develop a charter for a WG or include scope in existing Coding & Synchronization WG. SLS AREA

SLS AREA REPORT E. PROPOSED AREA RESOLUTIONS / ACTION ITEMS 1.RFM WG Resolve 1: raise CCSDS 401 recommendations A/B, B and 2.6.8B to blue status; Resolve 2: initiate agency review of CCSDS 401 pink recommendations 2.2.3, and A/B; Resolve 3: retire CCSDS G to historical status; Resolve 4: approve RFM WG revised charter (deletion of 412 updating activities). 2. RNG WG Resolve 1: for approval of RNG WG charter update. 3. TCC WG Resolve 1: Closure of TCC WG

SLS AREA REPORT E. PROPOSED AREA RESOLUTIONS / ACTION ITEMS 4. C&S WG Resolve 1: publish DVB-S2 OB; Resolve 2: publish pink sheets on CRC clarification on books: –CCSDS = TM SPACE DATA LINK PROTOCOL –CCSDS = AOS SPACE DATA LINK PROTOCOL –CCSDS = TC SPACE DATA LINK PROTOCOL –CCSDS = SPACE PACKET PROTOCOL for agency review Resolve 3: publish pink sheets on CRC clarification on book CCSDS 211.2

SLS AREA REPORT E. PROPOSED AREA RESOLUTIONS / ACTION ITEMS 5. SLP WG Resolve 1: that the a) Space Data Link protocol Version 1.0 GB and b) Space Data Communications Protocol Version 2.0 GB and c) Space Packet Protocol GB Version 1 be published as green books Resolve 2: that pink sheets be circulated for agency review on the Fill packet description for the Encapsulation Service Resolve 3: that pink sheets be circulated for agency review on the APID definition for SPP BB Resolve 4: that pink sheets be circulated for agency review on the fill packet for AOS and TM SDLP