1 / 20

SLS AREA REPORT November 2004

SLS AREA REPORT November 2004. SLS AREA REPORT. CONTENTS. CURRENTLY ACTIVE WGs AND BOFs WITHIN AREA SUMMARY TECHNICAL STATUS OF EACH WG & BOF CROSS-AREA TECHNICAL ISSUES OTHER ISSUE AND CONCERNS PROPOSED AREA RESOLUTIONS/ACTION ITEMS. SLS AREA REPORT.

reilly
Download Presentation

SLS AREA REPORT November 2004

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SLS AREAREPORT November 2004

  2. SLS AREA REPORT CONTENTS • CURRENTLY ACTIVE WGs AND BOFs WITHIN AREA • SUMMARY TECHNICAL STATUS OF EACH WG & BOF • CROSS-AREA TECHNICAL ISSUES • OTHER ISSUE AND CONCERNS • PROPOSED AREA RESOLUTIONS/ACTION ITEMS

  3. SLS AREA REPORT • LIST OF CURRENT WGs AND BOFs WITHIN AREA • SLS-RFM - RF & Modulation WG • SLS-C&S – Coding & Synchronisation WG • SLS-DC – Data Compression WG • SLS-SLP – Space Link Protocols WG • SLS-TCC – Telecommand Channel Coding WG • SLS-RNG – Ranging WG • SLS-Prox-1 Build-2 WG • SLS-LEC - Long Erasure Codes BOF • SLS-LDPC - New Codes BOF

  4. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-RFM WG • Goal: align 401.0-B with WRC-03, SFCG-23 and SFCG-24 • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress: • Agreed way forward to resolve deadlock on recommendation 2.4.18 found. White 2.4.18 drafted in accordance with SFCG 14-3R6 to remain white until after SFCG-25 meeting in October 2005;

  5. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-RFM WG • Working Group Summary progress: • small number of revised recommendations expected in Spring 2005, following on-going simulation results and joint RFM-C&S WGs meeting. • Problems and Issues: • Requirement to await SFCG-25 completion before finalizing white 2.4.18 to avoid same problems of current 2.4.18  need to delay WG termination date from August 2005 to end of November 2005. SLS-RFM WG Fall-05 meeting to be planned Nov’05 (after SFCG-25) • Green Book containing Earth station characteristics (411.0-G-3) will not be maintained any longer. To be taken over by IOAG or ECSS.

  6. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-C&S: Coding & Synchronization WG (1) • Goal: - Issue TM Channel Coding GB • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress:

  7. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-C&S: Coding & Synchronization WG (2) • Problems and Issues: • Telemetry Channel Coding Green Book could not be published for reasons of formating problems (see D. Other Issues & Concerns, Issue 1) • Scope of the Orange Book • WG mainly discussed the Orange Book as per MoMs held at University of Maryland. • WG is still awaiting NASA’s reply to CMC-S04-A25 to proceed (or not) with the Orange Book .

  8. SLS AREA REPORT • 3. Data compression WG • Goal: • Specify an image compression algorithm fulfilling identified space mission requirements • Develop a subsequent recommendation together with the supporting information (performances, usage, reference software, etc …). • Working Group Status: Active • Working Group Summary Situation: • Charter has been updated

  9. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • 4. SLS-SLP WG • Goal: - Adapt, Adopt, and Create link layer Protocols for space data systems - Develop Link Layer Green Books for CCSDS Link Layer Protocols • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress: • Produced Pink Sheet to Space Link Identifiers Blue Book to add Prox-1 Port ID Values. Submitted to secretariat for agency review. • Reviewing the Draft Proximity-1 Space Link Protocol GB. • Recommend that the Secretariat publish the Space Link Protocols GB and the Space Data Link Protocol GB. Submitted to secretariat for publishing on web site.

  10. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • 4. SLS-SLP WG • Problems and Issues: • Pink sheets for AOS Link Layer Protocol (increase in AOS frame sequence count) approved for release by CMC (Spring’04) but still not published for agency review. • RED-2 Version of Encapsulation Packet Service approved by CESG (Spring’04) submitted again to secretariat for agency review

  11. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-TCC: Telecommand Channel Coding WG • Goal: Development of a Telecommand Channel Coding Green Book. • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress: • First Draft Book delivered by ESA Editor for commenting within the WG. Under WG review.

  12. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • RNG WG • Goal: issue blue book on novel ranging techniques • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress: • Agency review on delta-DOR recommendation completed; • Independent theoretical analysis and simulation results on most regenerative PN ranging specs available from two Agencies; • Four (+one) different ranging schemes identified as possible candidates for regeneration;

  13. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • 6. RNG WG • Working Group Summary progress (cont.): • Preliminary hardware results on a subset of the four options available from one Agency; • White book (Issue 1) to be issued by July 2005 is being written with focus on regenerative PN codes; • Transparent PN codes will be addressed after WB issue 1 is out. • Simulation work initiated with one agency. • Problems and Issues: • None so far.

  14. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • 7. Prox-1-Build-2 WG • Goal: Update the Proximity-1 Space Link (3) books to be in sync with the first generation of Prox-1 spacecraft • Working Group Status: Active • Working Group Summary Situation: • The only remaining item in this WG, is to resolve the following physical layer requirements: 1) data rate offset, 2) short term data rate stability, 3) long term data rate stability. • Working Group Summary progress: • Pink Sheets created for Prox-1 Physical Layer BB to cover those three requirements above. Submitted to secretariat for agency review. • Problems and Issues: • None

  15. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS-LEC: Long Erasure Codes (‘tornado codes’) BOF • Goal: Make, if conclusive, a proposal for the creation of a WG on application of long erasure-correction codes. • Working Group Status: Active • Working Group Summary Situation: • Working Group Summary progress: • Restart expected by April’05 • Problems and Issues: • NASA/JPL did not contribute to this meeting (because of – now solved- funding issues) but report readiness to collaborate for Spring 2005 Meeting.

  16. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS- LDPCC: New CodesBOF (part 1) • Goal: Identify Requirements for future codes and possibly select a family of Codes according to identified requirements. • Working Group Status: Active • Working Group Summary Situation:

  17. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • SLS- LDPCC: New Codes BOF • Plan of Action Decided at SLS Plenary (1): • The discussion highlighted the need of identifying and approving requirements in stronger and more formal way. • ESA/ESOC/UniBO is leading the Editing work for a Requirements and Evaluation Criteria Document (RECD) (with weighting factor) for approval by Agencies. RECD will include rationale for each requirement. • 1st issue RECD shall be distributed by 10 January 2005. It shall provide a preliminary list of requirements/rationale and evaluation criteria for at least 3 application profiles: High rate EES TM, Deep space TM and Near Earth science TM. • Comments to 1st issue RECD by email by 31 January 2005. Telecon if necessary. • 2nd issue RECD distributed 15 Feb • Comments to 2nd issue RECD 15 March – any later comment will be discarded. (Agencies will be asked to “sign up” or ‘deny” individual items by e-mail revision/discussion by 15 March 2005). • 3rd (tentative final) issue RECD distributed 25 March

  18. SLS AREA REPORT • SUMMARY TECHNICAL STATUS • 9. SLS- LDPCC: New Codes CodesBOF (part 4) • Plan of Action Decided at SLS Plenary (2): • SLS-LDPCC Spring 2005 Meeting (11..15 April 2005) will be dedicated to addressing not closed comments to 2nd issue and finalising the RECD. • Approval of RECD by agencies subsequent to Spring’05 meeting. • Upon approval of RECD, agencies will be invited to submit proposals (codes) together with compliance matrix to RECD. • Codes proposals to be discussed at Fall’05 meeting

  19. SLS AREA REPORT • CROSS-AREA TECHNICAL ISSUES • Secure CommunicationsJoint SLS Area – Security WG planned for April meeting (pending schedule compatibility)

  20. SLS AREA REPORT • OTHER ISSUES AND CONCERNS Nothing to report

More Related