1 19 September 2005 Space Link Services Area report to CMC Reston, Virginia, USA, 26 September 2005

19 September 20051

Space Link Services Area Space Link Services Area report to CMCreport to CMC

Reston, Virginia, USA, 26 September 2005

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

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

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

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


comment: X

SLS AREA REPORT

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

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.


comment: work in progress

SLS AREA REPORT

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:



SLS AREA REPORT

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:



SLS AREA REPORT

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 Summary Situation : Convert to a WG in support of CIS-Lunar



SLS AREA REPORT

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

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:



SLS AREA REPORT

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

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

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 Summary Situation : There is consensus to form a WG



SLS AREA REPORT

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

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

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.

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.

Documents

1 19 September 2005 Space Link Services Area report to CMC Reston, Virginia, USA, 26 September 2005