1 19 september 2005 space link services area report to cmc reston, virginia, usa, 26 september 2005
TRANSCRIPT
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19 September 20051
Space Link Services Area Space Link Services Area report to CMCreport to CMC
Reston, Virginia, USA, 26 September 2005
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19 September 20052
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
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19 September 20053
1. SLS-RFM - RF & Modulation WG (*)
2. SLS-RNG – Ranging WG (*)
3. SLS-TCC – Telecommand Channel Coding WG
4. SLS-C&S – Coding & Synchronization WG
5. SLS-LEC - Long Erasure Codes BOF
6. SLS-SLP – Space Link Protocols WG
7. SLS-PROX – Proximity Links-1 Build-2 WG
8. SLS-HDRU – High Data Rate Uplink BOF
9. SLS-DC – Data Compression WG
10. SIS-IPCL – IP-over-CCSDS Links BOF (**)
(*) did not meet in Atlanta, will meet 11/2912/2 after SFCG(**) not in the area but dealing with space link interface
A. LIST OF CURRENT WGs AND BOFs WITHIN AREA
SLS AREA REPORT
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19 September 20054
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:
Green Book finalized.
Rids to BB 231 processed – Agreed to ask Technical Corrigendum instead of Pink Sheets (Change previous resolution on the subject)
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 20055
SLS-C&S: Coding & Synchronization WG (1)• 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: OK CAUTION PROBLEM
comment: X
SLS AREA REPORT
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19 September 20056
SLS-C&S: Coding & Synchronization WG (2)• Telemetry Channel Coding Green Book prepublication version
provided by secretariat. A few minor changes agreed in this meeting (old resolution existed covering publication of GB)
• Orange Book on GSFC LDPC Codes:Book was discussed, update to be performed according to comments received. Ready to be published.
• Orange Book on JPL LDPC Codes:No update provided. Previous version considered “Ready for publication” by JPL
• NASA official decision awaited w.r.t. the number of orange books (1 or 2) to be published
• Orange Book on ESTEC SCCC:Initial Draft provided.
• Report on Requirements from (closed) New Codes BOF presented. No further progress made towards a common set of requirements
SLS AREA REPORT
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19 September 20057
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 to CCSDS coms
• BOF Status : Active
• BOF Summary Situation:
• Working Group Summary progress:
NASA and ESA reports presented.
Draft Requirements for eventual WG identified (To Be Discussed).
Decision on creation of WG to be taken at Spring 2006 meeting.
Presentation to SDLP/MOIMS/SIS of LEC capabilities in spring 2006 foreseen to have feedback on mission scenarios & requirements.
status: OK CAUTION PROBLEM
comment: work in progress
SLS AREA REPORT
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19 September 20058
SLS-Space Link Protocols WG
Goal:
• Dispose AOS Frame Sequence counter extension RID to Pink Sheet.
• Discuss Encapsulation Header Pink Sheet (32-bit compatibility)
• Discuss RID on Prox-1 Data Link Layer Pink Sheet (Frame Prioritization)
• Pink Sheets to Space Link Identifiers
• Discussion on comments to Link Layer Green books
BOF Status: Active X Idle ____
BOF Summary Situation:
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 20059
Prox-1 Build-2 WG
Goal:
• Provide a requirement in the Prox-1 Physical Layer for data rate stability: both short and long term
WG Status: Active X Idle ____
WG Summary Situation:
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 200510
High Rate Uplink BOF
Goal:
• Provide technical recommendations to the CIS-Lunar WG in the areas of RF&Modulation, Coding, and Link Layer protocols in support of the Lunar Exploration Missions.
• Address the high rate uplink requirements from the IOAG.
BOF Status: Active X Idle ____
BOF Summary Situation : Convert to a WG in support of CIS-Lunar
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 200511
High Rate Uplink BOF (cnt’d)
BOF Summary progress:
• This BOF has provided a preliminary set of issues/requirements for the CIS-Lunar WG to respond to.
• The draft WG charter will be updated to become the
WG charter (if approved by CESG)
SLS AREA REPORT
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19 September 200512
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, test data for compliance testing, …).
Working Group Status: Active X Idle ____
Working Group Summary Situation:
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 200513
• Image Data Compression CCSDS 122.0-R-2 has been reviewed : 46 RIDS received and closed. Update RB-2 with disposed RIDS and request for promotion to BB.
• Image Data compression Green book is being assembled; editing leadership has been split among WG members; major chapters completed. Complete GB draft WG review and request approval from CESG
• Cross verification of recommendation near completion: 3 S/W under verification with 95% completion. Decision is to host JPL S/W at Open Channel S/W website which JPL has an agreement for open-source S/W.
• Compression needs and on-going work presented by ESA, CSA, CNES and NASA JPL. Three topics for potential BOFs will be considered, only one will be
chosen before next meeting.
SLS AREA REPORT
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19 September 200514
Data compression WG (cnt’d)
Planning :
• Complete S/W cross-verification Oct., 2005• Issue BLUE BOOK, Oct., 2005• Complete GREEN BOOK draft Feb., 2006• Release reference S/W, March, 2006• Issue GREEN BOOK, April, 2006• Begin agency review of 121.0-B-1: Lossless Data Compression
Blue Book issued 1997 for either confirmation, update or retirement, March, 2006
• Decision on new Compression BOF (SAR, Multi/Hyper-Spectral, New Lossless), April 2006
SLS AREA REPORT
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19 September 200515
IP over CCSDS Links BOF
Goals:
• Clearly articulate the need to transfer IPv4 and IPv6 datagrams over the four underlying internationally standardized CCSDS link layer protocols
• Describe the standard CCSDS options for carrying IP datagrams within those CCSDS frames, including the mode where those IP datagrams are encapsulated within a specific HDLC serial bit stream for interfacing with a COTS router.
BOF Status: Active X Idle ____
BOF Summary Situation : There is consensus to form a WG
status: OK CAUTION PROBLEM
comment: Good progress
SLS AREA REPORT
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19 September 200516
IP over CCSDS BOF (cnt’d)BOF Summary progress:
• This BOF has reviewed the Concept Paper i.e., draft White book towards the development of a Recommended Practice for how to guide the user in transferring IP over CCSDS links.
• The draft WG charter will be updated to become the WG charter
SLS AREA REPORT
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19 September 200517
Cross-area technical issue
• Secure communications
• Need for secure RF&Mod recommended techniques ?• Need for secure data link protocols ?
• Cislunar missions
• Input expected from Cis-lunar space internetworking WG- Services & performances expected from layers 1 & 2
- Critical as a starting point for high rate uplink WG
• SIS area
• Review by SIS of Space Packet Protocol GB needed
• Interaction with SIS needed on encapsulation packet definition- Protocol ID extension, end-destination address- Inclusion of “encapsulation packet” rec. in IP-over-CCSDS link charter
• Interpretation of APID- Old interpretation have been dropped in the restructuring of
recommendations
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19 September 200518
Proposed area resolutions & action items
• Res 1 : request CESG to enable the creation of high rate uplink WG
• Res 2 : Request CESG to trigger review of modified Pink Sheet to AOS “extension of VC frame counter”
• Res 3 : Request CESG to trigger review of Pink Sheet to Prox-1 Data Link Layer
• Res 4 : Request CESG approve Pink Sheet to Space Link Identifiers as is.
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19 September 200519
Proposed area resolutions & action items
• Res 5 : Given successful review of Image Compression RB-2, request CESG to approve Image Compression recommendation as a blue book after final update
• Res 6 : request creation (at next meeting) of new BOF on subjects to be chosen among three topics: SAR data compression, Multi/Hyper-spectral data compression or new general-purpose lossless compression
• Res 7 : Ask Technical Corrigendum for BB 231(TC channel coding & synchronization) instead of Pink Sheets
• Res 8 : request publication of TM Channel Coding GB
• Res 9 : request CESG approval of new codes Orange Book from NASA.