Space Link Services Area report to CESG

16 June 20061

Space Link Services Area Space Link Services Area report to CESGreport to CESG

Rome, Italy, 16 June 2006J.L. Gerner / G. Moury

16 June 20062

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

16 June 20063

1. SLS-RFM - RF & Modulation BOF

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-HDRU – High Data Rate Uplink WG

7. SLS-SLP – Space Link Protocols WG

8. SLS-PROX – Proximity Links-1 Build-2 WG

9. SLS-DC – Data Compression WG

A. LIST OF CURRENT WGs AND BOFs WITHIN AREA

SLS AREA REPORT

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B. SUMMARY TECHNICAL STATUS1. RFM WG

Goal: align 401.0-B with WRC-03, SFCG-23 and SFCG-24

Working Group Status: Completed work

Working Group Summary Situation:

status: OK CAUTION PROBLEM

comment: Good progress

SLS AREA REPORT

16 June 20065

1. RFM WG

Working Group Summary progress:

• Review of Agency RIDs to RF&Mod Recs (401):• RIDs (mostly editorial) dispositioned • RES1 to elevate these recommendations to blue status

• IOAG and SFCG liaison statements on BW-efficient modulation recommendations• Response prepared in Fall2005 updated in light of above agency

review• RES2 to forward response liaison statements to IOAG & SFCG

SLS AREA REPORT

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1. RFM BOF• Status:

• BOF worked on Lunar/Martian mission profiles• Need for 22/26/32 GHz modulation schemes as well as 2 GHz

techniques for Moon missions identified (401). New WG to develop recommendations as needed based on requirements expressed by HRU WG

• Need to update green book on BW-efficient modulation (413) identified including normative/informative split

• Request by CESG to review green book on RF compatibility test procedures (412) considered

• Future work/charter:• Charter for new SLS-RFM WG agreed by BOF• SLS approved new charter• RES3 for approval of RFM WG charter

SLS AREA REPORT

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B. SUMMARY TECHNICAL STATUS2. RNG WG

Goal: issue blue book on novel ranging techniques

Working Group Status: Active




AREA REPORT

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2. RNG WG

Working Group Summary progress:• Current status:

• PN Ranging White Issue 2 book drafted• Contains all PN code options identified so far• Metrics for comparison/selection code(s) agreed• Two independent simulation results available for most

performance criteria• Missing simulation as well as hardware test results expected in

Spring 2007• Future work/charter:

• Future work continues as per charter – no changes/delays foreseen;

• Red book due July 2007

SLS AREA REPORT

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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: Active

• Working Group Summary Situation:

• Working Group Summary progress :

See next slide



SLS AREA REPORT

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3. SLS-TCC: Telecommand Channel Coding WG (2 of 2)

• Working Group Summary progress:

230.1 Green Book Poll: adopted by CMC, but no CESG quorum (2 Approve + 1 Abstain). SLS Area requests full approval by CESG.

Technical Corrigendum to BB 231.0-B-1 TC Sync & Ch Coding produced and processed – To Be on the CCSDS Publications page… soon.

The WG supported also the High Rate Uplink (HRU) WG Meeting

• Working Group Future:

The WG will deactivate as soon as the books are published.

WG Members are expected to continue contributing/monitoring the HRU work.

The WG will reactivate based on input task by HRU WG.

SLS AREA REPORT

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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:


See next slide


comment: X

SLS AREA REPORT

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B. SUMMARY TECHNICAL STATUS4. SLS-C&S: Coding & Synchronization WG (2 of 5)


Telemetry Channel Coding Green Book is under CESG+CMC Poll. SLS solicits CESG voting (closing 23/6).

Orange Book on LDPC Codes by GSFC & JPL :

CESG Poll rejected the Books (complaints to CCSDS procedures?).

Poll result “revoked” by CESG Chair.

Eventually NASA decided to merge the books. Merged version submitted to WG. Conflict about Bit Numbering conventions applied by GSFC/JPL to be fixed before publication. No technical change declared, but possible technical improvement presented by JPL (for their part) for future versions.

RES9: SLS Area submits NASA Orange Book for approval by CESG

SLS AREA REPORT

16 June 200613



Orange Book on ESA SCCC: New Draft provided. HW Demo held.

CNES Orange Book for Telemetry Frames over DVB-S2. Initial Draft provided.

General: The WG continues applying collaborative attitude on Orange Books without implying consensus.

CNES presented issues with Idle Data when CCSDS Randomizer is used (High Data Rates problem). A search for a more powerful randomizer likely to be future task for this WG.

• Round Table on Profiles & Requirements (Joint with RF&M) show no prospect for quick move towards a BB. Agencies are however asked to produce profiles for future applications of Channel Coding.

SLS AREA REPORT

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• Orange Books are not a CCSDS final objective but only one tool supporting development of BBs

• Risk of seing agencies developing each their own standard based on their OB

• SLS proposals:

1. Highlight on CCSDS web site and in publications the unique ‘ primary’ status of BBs as approved standards and classify the rest under ‘ other books’ or ‘ supporting material’

2. Put in place a new WG on next generation TM systems with ‘mission-minded’ members to identify mission needs and produce requirements

SLS AREA REPORT

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• Joint activity performed with SLP for CRC clarification issues (shared area: Coding expertise needed for Books under SLP responsibility). Remarks: CRC is used in several books (e.g. TC, TM, Prox-1).

Possible clarification discussed.

Agreement to be reached about inserting figures (i.e. Logical Diagrams) into the books. Draft figures produced for discussion (eventual e-mail exchange foreseen).

Focus is now on improving the affected Blue Books.

Possible point of discussion for the future: Should CRC issues on e.g. techniques, performances, reference code, etc. be collected together as Green Book material? Proposal to be analysed by the WG.

SLS AREA REPORT

16 June 200616

B. SUMMARY TECHNICAL STATUS6. 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

• BOF Summary Situation:


NASA and ESA reports presented. Technical progress positive.

Decision on creation of WG planned to be taken at this Spring 2006 meeting.

Only NASA in favour of creation of a WG


comment: work in progress

SLS AREA REPORT

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B. SUMMARY TECHNICAL STATUS6. SLS-LEC: Long Erasure Codes (‘tornado codes’) BOF (2 of 2)


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).

BOF is extended to 2007 with the targets below for better inter-area discussion:

Production of profiles addressing:

Scenario with limited number of erasures;

Scenario with High number of erasures;

Intermediate scenario.

Design, for the profiles above, of LEC solutions addressing both:

Approach at Frame level (i.e. constant length input data)

Approach at (Space/CFDP) Packet level (i.e. variable length input data).

SLS AREA REPORT

16 June 200618

6. High Rate Uplink WG

Goal:

• Address the 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.



SLS AREA REPORT

16 June 200619

6. High Rate Uplink WG (cnt’d)WG Summary progress:

• WG examined use of CC(7,1/2) code with CCSDS TC link protocol to provide 4 to 6 dB added coding gain.

• Fabrizio Pollara to provide white (concept) paper on the

performance characteristics of this code i.e., CC(7,1/2) with the BCH.

• Others are of the belief that the BCH code and the CC(7,1/2) don’t marry well - due to average burst error length out of Viterbi decoder – swamps BCH error detection capability

SLS AREA REPORT

16 June 200620

6. High Rate Uplink WG (cnt’d)

Problems and Issues:

• Is the low hanging fruit solution sufficient? How far do we need to go?

SLS AREA REPORT

16 June 200621

6. High Rate Uplink WG (cnt’d)

Planning :

• Deliver the White paper to the WG by Aug.30, 2006• Action on the WG to develop application profiles and associated

requirements

SLS AREA REPORT

16 June 200622

1. 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 Proximity-1 Space Link Protocol draft GB to Green book.

• Progress Pink Sheets to Space Link Identifiers to Blue.

• Verify that the Encapsulation Service progresses to Blue.

• Verify that the AOS pink Sheets progresses to Blue.

BOF Status: Active X Idle ____

BOF Summary Situation:



SLS AREA REPORT

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SLS-SLP WG (cnt’d)

SLS-SLP Summary progress:

• Takahiro answered the questions concerning:• Draft Space Data Link Protocol GB• Version 1 of Space Communications protocol GB

• ESA needs to get back to Takahiro to close the loop on Takahiro’s responses.

• Prox-1 GB needs to go out to the community as a green book (Aug. 15)• Performance Analysis of Frame selection rules will be supplied in this

book before release• Later versions will include RF&Mod, Coding& synch, and more link

layer performance issue discussions.• Pink sheet to Space Link Identifiers discussed and consensus obtained at the

WG level.• Make sure that we don’t lose track of two SLS documents that are in the

pipeline to become blue:• AOS Space Data Link Pink Sheets (to enhance frame seq counter)• Encapsulation Service to Blue

SLS AREA REPORT

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• No other additional problems or issues.

SLS AREA REPORT

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Planning :

• Provide Prox-1 GB to secretariat by Aug. 15• Continue development of Prox-1 GB on performance issues

across RF&MOD, Coding & synchronization, link layer.

SLS AREA REPORT

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Resolutions :

RES4 requests the a) Space Data Link Protocols and b) Overview of Space Communications Protocols be published as a) new green book and b) an updated GB

RES5 requests the Prox-1 GB be published as Version 1.0

SLS AREA REPORT

16 June 200627

8. Prox-1 Build-2 WG

Goal:

• Progress the Pink Sheet on the Prox-1 Space Data Link Protocol concerning the Frame Prioritization Rules within the Data Link layer of Proximity-1

• Provide performance analysis on these rules within the Prox-1 GB

WG Status: Active X Idle ____

WG Summary Situation:



SLS AREA REPORT

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8. Prox-1 Build-2 WG (cnt’d)WG Summary progress:

• Performance Analysis guidelines established. Details to

be provided in Prox-1 GB version 1.

SLS AREA REPORT

16 June 200629

8. Prox-1 Build-2 WG (cnt’d)


CESG poll on Prox Data Link Pink Sheets: no quorum?(SIS comments addressed & settled)

SLS AREA REPORT

16 June 200630

8. Prox-1 Build-2 WG (cnt’d)

Planning :

• Work completion by end 2006.

SLS AREA REPORT

16 June 200631

9. 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 X Idle ____




SLS AREA REPORT

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9. Data compression WG (cnt’d)

Working Group Summary progress:• New members: NOAA and Alcatel Alenia Space (AAS)• Released Image Data Compression BB 122.0-B.1

2 comments received.• Image Data Compression Green book is being re-organized,

draft completed with the exception of one annex. • Reference test vectors are available for complete functional

testing of coder and decoder implementations. • Cross verification of recommendation near completion: 3

S/W under verification with 2 completed, and the third 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.

• Flight hardware development near completion.

SLS AREA REPORT

16 June 200633


Working Group Summary progress:• Solicited input positions on future work

Received support from ASI, CNES, CSA, ESA and NASA on forming a BOF on multi-/hyper-spectral data compression.

• Participating members for BOF: CNES, CSA, ESA, NASA, NOAA, AAS

• Completed the preliminary mission requirements table with two mission profiles: multispectral and hyperspectral.

• Initiated WG review of 121.0-B.1 & 120.0-G.1 2 RIDS received for 121.0-B.1 and 2 RIDS received for

120.0-G.1 WG decides to re-confirm the two books pending

updates

SLS AREA REPORT

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Data compression WG (cnt’d)


• None

SLS AREA REPORT

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Data compression WG (cnt’d)

Planning :

• Complete GREEN BOOK draft Sep., 2006• Complete S/W cross-verification Aug., 2006• Internal release reference S/W, Sept., 2006• Public release reference S/W, Dec., 2006• Issue GREEN BOOK, Dec., 2006• Request for BOF “Multi/Hyper-spectral Data Compression”

Approval, June, 2006• Provide mission requirements and quality measures for BOF,

Next meeting

SLS AREA REPORT

16 June 200636


Outcomes:

SLS has approved creation of new BOF on Multi/Hyper-spectral data compression;

Resolutions :

• RES6 Given successful review of draft GB; SLS will submit GB to CESG polling upon completion of the GB (Dec. 2006); (in September)

• RES7: SLS requests CESG to re-confirm and re-issue updated CCSDS 121.0-B-1. & 120.0-G-1

• RES8: SLS requests CESG to release technical corrigendum for 122.0-B.1 with WG approved updates (editorial improvement).

SLS AREA REPORT

16 June 200637

Data Compression BOF

Next Meeting Objective

• To obtain agreement from the BOF members on WG Requirements

Table and mission profiles

• Decide on direction (select mission profiles)

• Secure resources

• Draft working group charter

• Request for approval of WG charter

SLS AREA REPORT

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Cross-area technical issue

• Need to reinforce HRU WG – Cislunar WG coordinationCan Cislunar WG provide application needs to HRU WG?Coordination with agencies lunar programmes?

SLS AREA REPORT

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Other issues & concerns

• None

SLS AREA REPORT

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Proposed area resolutions & action items

• RES1 SLS requests CESG to elevate these recommendations to blue status

• RES2 SLS requests CESG to forward response liaison statements to IOAG & SFCG

• RES3 SLS requests CESG to approve RFM WG charter• RES4 SLS requests the a) Space Data Link Protocols and b) Overview of

Space Communications Protocols be published as a) new green book and b) an updated GB

• RES5 SLS requests CESG to approve publication of the Prox-1 GB as Version 1.0

• RES6 Given successful review of draft GB; SLS will submit GB to CESG polling upon completion of the GB (Dec. 2006); (in September)

• RES7: SLS requests CESG to re-confirm and re-issue updated CCSDS 121.0-B-1. & 120.0-G-1

• RES8: SLS requests CESG to release technical corrigendum for 122.0-B.1 with WG approved updates (editorial improvement).

• RES9: SLS Area submits NASA Orange Book for approval by CESG

SLS AREA REPORT

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Space Link Services Area report to CESG

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