Space Link Services Area report to CESG/CMC

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

Colorado Springs, USA, 24 January 2007J.L. Gerner / G. Moury

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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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1. SLS-RFM - RF & Modulation BOF

2. SLS-C&S – Coding & Synchronization WG

3. SLS-DC – Data Compression WG& Multi & Hyperspectral Data Compression BOF

4. SLS-SLP – Space Link Protocols WG

5. SLS-TCC – Telecommand Channel Coding WG - idle

6. SLS-RNG – Ranging WG

7. SLS-PROX – Proximity Links-1 Build-2 WG - closed

8. SLS-HDRU – High Data Rate Uplink WG

9. SLS-LEC - Long Erasure Codes BOF

A. LIST OF CURRENT WGs AND BOFs WITHIN AREA

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SLS Attendance (1/3)

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B. SUMMARY TECHNICAL STATUS1. RFM WG

Goal: Recommendations on 22 (the band near 22 GHz), 26 and 32 GHz modulation, and on 2

GHz modulation for Moon missions;

Revision of 2.4.17A, and editorial revision 2.4.17B and 2.4.18, and draft companion recommendations;

Editorial revision of 413.0-G;

Assessment of amount of work needed and affected sections for a revised 412.0-G.

Working Group Status: Active

Working Group Summary Situation:

status: OK CAUTION PROBLEM

comment: Good progress

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RFM WG (cont’d)

Working Group Summary progress:

• 32 GHz modulation recommendation agreed by WG• RES1 to submit new recommendation 2.4.20B for agency review

• Revised recommendation on phase/amplitude imbalance agreed by WG• RES2 to submit revised recommendation 2.4.12A and 2.4.12B for

agency review• Revised recommendation on 34/32 GHz turn-around ratios agreed by

WG• RES3 to submit revised recommendation 2.6.8B for agency review

• 413.0-G reviewed together with recommendations 2.4.17A/B and 2.4.18: way forward and actions agreed for next meeting

• 412.0-G not yet reviewed by WG members

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2. SLS-C&S: Coding & Synchronization WG (1 of 3)

• 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

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SLS-C&S: Coding & Synchronization WG (2 of 3)


Telemetry Channel Coding Green Book CCSDS 130.1-G-1: published.

Orange Book on LDPC Codes by GSFC & JPL (merged version) :

Issue 1 published.

Updated version presented at this meeting for update.

Orange Book on ESA SCCC: Updated Draft provided.

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

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

Publication of ESA+CNES+NASA/issue2 Books by April 2007 or earlier.

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SLS-C&S: Coding & Synchronization WG (3 of 3)


• 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).

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

ESA proposal presented and discussed. Consensus reached on approach to improve CRC figures.

Action: ESA to propose Technical Corrigendum to CRC-16 & CRC-32.

Next step (prior to next meeting): Ensure consistency among all blue books using CRC and issue technical corrigenda.

Further work: The material on CRC issues on e.g. techniques, performances, reference code, etc. be collected for updating (CRC parts of) TM/TC Green Books.

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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 X Idle ____



comment: Nearly complete.

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Data compression WG (cont’d)

Working Group Summary progress:

• Finalized Green Book draft. Submitted for publication Feb 07.

• Reviewed status of simulation softwares.• Agreed to list multiple available software

implementations on WG web site with a link from CCSDS web site blue book page.

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Problems and Issues:

• None

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Planning :

• GREEN BOOK to be submitted for SLS approval end of January 2007.

• Upload verification test data to WG web site February 2007.

• Disband WG upon completion of all AI

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Data compression WG (con’t)

Resolutions :

• Res7: Request SLS AD to submit GB to CESG polling upon completion of the GB (end Feb 2007);

• Res8: Dissolve the present working group pending approval and publication of Green Book.

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Multispectral/Hyperspectral Data Compression BOF

Goals:

• Establish Charter for Multi-/Hyper-spectral Data Compression Working Group;

• Establish milestones and schedules for Multi-/Hyper-spectral Data Compression Working Group;

• Request and gain support from participating agencies for Multi-/Hyper-spectral Data Compression Working Group.

BOF Status: Completed.

BOF Summary Situation:


comment: Goals achieved.

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Multi and Hyperspectral Data compression BOF (cont’d)

BOF Summary progress:• Drafted charter for new Multispectral and

Hyperspectral Data Compression (MHDC) Working Group

• New member: EADS Astrium (Martin Plintovic)• Reviewed agency needs to consolidate common

requirements matrix• Outlined work plan• BOF requests SLS Area Director to create MHDC

Working Group according to proposed charter

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• None

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Planning :

• Establish requirements matrix - Fall 2007• Establish selection criteria - Fall 2007• Establish test data sets - Fall 2007• Identify candidate approaches - Fall 2007• 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

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Resolutions :

• Request SLS Area Director to create new Multispectral and Hyperspectral Data Compression (MHDC) Working Group according to draft charter.

• Request SLS Area Director to approve Aaron Kiely as new Working Group chair.

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Next Meeting Objectives

• Select test data sets for algorithm evaluation

• Finalize requirements matrix

• Establish performance criteria for algorithm evaluation

• Establish candidate approaches

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4. SLS-SLP WG

Goal:

• Progress Overview of Space Communication GB to next GB version.

• Progress Space Data Link Protocol draft GB to a Green book.

• Progress Space Packet Protocol draft GB to a Green book.

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

WG Status: Active X Idle ____

WG Summary Situation: Good Progress



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SLS-SLP WG (cnt’d)

SLS-SLP Summary progress:

• All but 5 of the (ESA) open questions were answered concerning:• Draft Space Data Link Protocol GB• Version 1 of Space Communications protocol GB• Draft Space Packet Protocol GB

• However those 5 remaining issues are desires of ESA concerning the non-standard use of ISO defined terminology.

• A response was generated (to ESA) concerning the final resolution of these desirements

• Provision will be made for TBD statements in the Space Packet Protocol GB for inclusion of the old TM/TC definition of APID

• The RID against the Prox-1 GB from the SIS area director concerning how to express the performance of the new frame selection rules in the Prox-1 Data link layer blue book was explained and the resolution to this RID was accepted by the author. • A General Discussion of the Performance Analysis of the new

Frame selection rules will be supplied in this book before release

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WG Summary progress concerning the APID Definition:

• Concerning the definition of the APID:1. ESA (C&S WG chair) took the action to write a pink sheet to reestablish the old (non-LDP) TM/TC definition of the APID.2. ESA (C&S WG chair) took the action to write a pink sheet to optionally add the CRC-16 to the space packet.

ESA will circulate the draft pink sheets for #1 and #2 to the following joint WG members representing their member agencies for concurrence via email and eventual submission to Agency Review:a. Matt Cosby – BNSC, b. G.P. Calzolari – ESA, c. T. Yamada – JAXA, d. Greg Kazz - NASA/JPL, e. Tim Ray - NASA/GSFC, f. Gilles Moury - CNES

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• 3. Takahiro Yamada (JAXA) is assigned the action of investigating modifications to the Space packet Secondary Header per ESA request

• 4. Chris Taylor (ESA) is assigned the action of identifying any CFDP APID changes or as an alternative reinforcing the definition of the Space Packet type field.


WG Summary progress concerning the APID Definition:

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• See cross-area issues

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Planning :

• Provide final copies of these Green books to the CCSDS Secretariat within 2 months:

• Overview of Space Communication GB – Takahiro Yamada• Space Data Link Protocol GB – Takahiro Yamada• Space Packet Protocol GB – Takahiro Yamada• Proximity-1 Space Link Protocol – Greg Kazz

The SLP WG will be set idle upon publication of these 4 GBs and reactivated as soon as firm requirements from Mars BOF, Cislunar WG and Wireless BOF as well as from other sources (e.g. Space wireless workshop, agencies programmes, …) are available.

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Resolutions :

Res4 to request the Prox-1 GB be published as Version 1.0 Greenbook

Res5 to request the a) Space Data Link protocol and b) Space Data Communications Protocol be published as a) new green book and as b) an updated GB

Res6 to request the Space Packet GB be published as a new Green book

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5. 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:


See next slide


comment: Task Accomplished

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

• Working Group Summary progress:

Green Book CCSDS 230.1-G-1 : published.

Technical Corrigendum to BB 231: published.

In Colorado the WG supported the High Rate Uplink (HRU) WG Meeting

• Working Group Future:

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

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

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6. RNG WG

Goal: issue blue book on novel ranging techniques

Working Group Status: Active




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RNG WG (cnt’d)

Working Group Summary progress:• Current status:

• PN Ranging White Issue 2 book revised• Out of the 7 codes from previous issue, only 2 remain in present

release, selected for two different regenerative ranging scenarios• Discussion continues on two codes for transparent ranging • Missing transparent simulation as well as hardware test results

expected by July 2007• Future work/charter:

• Future work continues as per charter – 3 months delay needed due to delay with bread-boarding contract;

• Red book new due date October 2007• RNG WG charter updated (3 months’ delay)

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8. High Rate Uplink WG

Goal:

• Address the high rate uplink requirements as requested by 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: No definition of CCSDS HRU Requirements.


comment: No CCSDS requirements defined

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HRU WG (cnt’d)WG Summary progress:

• NASA presented HRU related “requirements” from Project Constellation. From a CCSDS perspective, these look more like solutions.

• Fabrizio Pollara (NASA/JPL) provided an update

(additional performance data) on the three uplink coding scenarios presented at the Rome meeting.

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High Rate Uplink WG (cnt’d)


• Each Agency needs to present its mission scenarios associated with high rate uplinks• NASA claims it has these scenarios but cannot yet share

them with other space agencies until management approval is given.

• ESA will investigate whether preliminary scenarios are available from the AURORA programme.

• A set of CCSDS high rate uplink related requirements has yet to be defined.

• The deadline given to the WG of End of Year 2007 for a blue book is deemed very hard to achieve given these constraints.

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High Rate Uplink WG (cnt’d)

Planning :

• Action item on each participating agency: CNES, ESA, NASA, JAXA to circulate its mission scenarios concerning high rate uplink by April 2007

• Res9: IOAG to provide mission/systems requirements for High Rate Uplink more detailed than those available with IOAG Res 8.7.1.

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9. 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:

NASA and ESA reports presented. Technical progress positive.

Future: see next slide


comment: work in progress

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SLS-LEC: Long Erasure Codes (‘tornado codes’) BOF (2 of 2)• Working Group Summary progress:

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). Confirmed.

The targets below for better inter-area discussion shall be finalized in the Darmstadt meeting (October 2007):

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).

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Cross-area technical issue

• A PICS (Protocol Implementation Conformance Statement) was requested by the SIS area Mars BOF to be defined for the 3 books of Prox-1, as identified by the Mars BOF. SLS proposes that SLS-SLP WG adopts this task as an update to the charter.

• Lunar/Mars missions. New needs may not be covered by Prox-1. New needs are to be identified. Upgrade of Prox-1 (?), development of Prox-2 (?). Inter-areas coordination to be put in place with SIS (Cislunar WG, Mars BOF) and SOIS (Wireless BOF).

• Space Packet Protocol: part of SIS or SLS?

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Other issues & concerns

• None

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Proposed area resolutions & action items (1/2)• Res1 to submit new recommendation 2.4.20B for agency review• Res2 to submit revised recommendation 2.4.12A and 2.4.12B

for agency review• Res3 to submit revised recommendation 2.6.8B for agency

review• Res4 to request the Prox-1 GB be published as Version 1.0

Greenbook• Res5 to request the a) Space Data Link protocol and b) Space

Data Communications Protocol be published as a) new green book and as b) an updated GB

• Res6 to request the Space Packet GB be published as a new Green book

Upon completion of the Data Compression GB (end Feb 07)• Res7 to request the Data Compression GB be published as a

new Green bookUpon publication of the Data Compression GB• Res8 to request the Data Compression WG be dissolved

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Proposed area resolutions & action items (2/2)

• Res9: IOAG to provide mission/systems requirements for High Rate Uplink more detailed than those available with IOAG Res 8.7.1.

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SLS AREA REPORT

Thank You

Space Link Services Area report to CESG/CMC

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