1 Space Link Services Area report to CESG/CMC Darmstadt, Germany, 9 October 2007 J.L. Gerner / G. Moury.

1

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

Darmstadt, Germany, 9 October 2007J.L. Gerner / G. Moury

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

SLS AREA REPORT

A. CURRENTLY ACTIVE WGs AND BOFs WITHIN AREA

1. RFM WG

2. RNG WG

3. TCC WG

4. C&S WG

5. SLP WG

6. LEC BOF

7. HRU WG

8. MHDC WG

SLS AREA REPORT

B. SUMMARY TECHNICAL STATUS OF EACH WG & BOF

SLS AREA REPORT

RFM WG

&

RNG WG

B. SUMMARY TECHNICAL STATUS1. RFM WG

Goal: • Review of SFCG-26/27 and WRC-07 decisions affecting 401.0-B;

• White-1 recommendation on 22 (the band near 22 GHz), 26 GHz modulation;

• White recommendations on 32 GHz modulation, and on 2 GHz modulation for Moon missions;

• Pink 2.4.17A/B, 2.4.18 and Red companion recommendations;

• draft revised 413.0-G ready for approval by CESG;

• pre-draft revised 412.0-G.

SLS AREA REPORT


Working Group Summary Situation:

• No SFCG-26/27 decisions affecting 401.0-B; WRC-07 not expected to affect 401.0-B;

• White-1 recommendation on 26 GHz modulation; No work done yet on 22 GHz;

• Blue recommendation on 32 GHz modulation;

• No work done yet on 2 GHz modulation for Moon missions;

• Pink 2.4.17A/B, and pink companion recommendations; White 2.4.18

• draft revised 413.0-G to remain in WG awaiting pink 2.4.18;

• silver status for 412.0-G.

SLS AREA REPORT


Working Group Status: Active


status: OK CAUTION PROBLEM

comment: Good progress

SLS AREA REPORT

1. RFM WG

Resolve 1: raise recommendations 2.4.12A/B, 2.4.20B and 2.6.8B to blue status;

Resolve 2: initiate agency review of pink recommendations 2.2.3, 2.4.2 and 2.4.17A/B;

Resolve 3: retire 412.0-G to historical status;

Resolve 4: approve revised charter (deletion of 412 updating activities).

SLS AREA REPORT

B. SUMMARY TECHNICAL STATUS2. RNG WG

Goal: issue Red Book on novel ranging techniques by November 2007

Working Group Status: Active




AREA REPORT

2. RNG WG

Working Group Summary progress:• Current status:

– PN Ranging White Book Issue 2.1 reviewed;– Regenerative channel sections completed;– Transparent channel sections expected to be finalized by April

2008.• Decisions:

– Agreed White Book Issue 2.2;– Do not publish Red Book on regenerative channels only.

• Future work/charter:– Red Book due April 2008 instead of November 2007;– Green Book proposed by April 2009;

– Resolve 1: for approval of RNG WG charter update.

SLS AREA REPORT

SLS AREA REPORT

TCC WG

C&S WG

LEC BOF

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: Suspended.

• Working Group Summary Situation:

• Working Group Summary progress :

See next slide


comment: Task Accomplished

SLS AREA REPORT


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

Original goal was achieved.

• Working Group Summary progress:

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

• Working Group Future:

The TCC WG is closed.

HRU coding activities will be dealt with in the C&S WG

• Resolve 1: Closure of TCC WG

SLS AREA REPORT


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

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

Original goal for publication of Telemetry Channel Coding Green Book achieved in the past.


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

Updated version published.

Orange Book on ESA SCCC: published.

CNES Orange Book for Telemetry Frames over DVB-S2. Updated Draft provided. Resolution to publish the book. [DVB-S2 Copyright issues to be investigated (G.Lesthievent will contact ETSI/DVB and ask for free use of the Cnes Orange Book)]Way to proceed to be discussed at CESG

SLS AREA REPORT

B. SUMMARY TECHNICAL STATUS4. SLS-C&S: Coding & Synchronization WG (3 of 5)


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

ESA draft pink sheets presented and discussed with minor improvements. Resolution Submit the following Pink Sheets to Agency Review [after fulfilling an ACTION (ESA) to Introduce notation C* for received frames]:

CCSDS 132.0 = TM SPACE DATA LINK PROTOCOL

CCSDS 732.0 = AOS SPACE DATA LINK PROTOCOL

CCSDS 232.0 = TC SPACE DATA LINK PROTOCOL

CCSDS 133.0 = SPACE PACKET PROTOCOL (addition, not improvement) [This book needs also a Technical Corrigendum for APID issues]

SLS AREA REPORT




• ESA draft pink sheets presented and discussed with minor improvements also for

• CCSDS 211.2 = PROXIMITY-1 SPACE LINK PROTOCOL-CODING AND SYNCHRONIZATION SUBLAYER

• Resolution : Pink sheet 211.2

SLS AREA REPORT




Follow up for the future: Ensure consistency among all blue books using CRC. The material on CRC issues on e.g. techniques, performances, reference code, etc. be collected for updating (CRC parts of) TM/TC Green Books.

SLS AREA REPORT

4. C&S Current+Future Work Items (1 of 2)

• Support Publication, RID Review and Approval of CRC Pink Sheets (4 +1 books)

• Update of the TM Channel Coding Green Book for

– CRC clarifications (ESA) [TC Green Book too?]

– Convolutional Codes clarifications (JPL)

• CCSDS 211.2 Proximity-1 Space Link Protocol-coding And Synchronization Sublayer was published in April 2003 Five Years Review due. Recommended to perform review and correct some inconsistencies. Check consistency wrt actual implementations.

• Eventually, verify correctness of related Green Book CCSDS 210.0-G-1 Proximity-1 Space Link Protocol-rationale, Architecture, and Scenarios


• High Data Rate Randomizer: Study will be started by ESA/ESOC

– Impact on TM Channel Coding Green Book

– Possible adoption of additional randomizer (i.e. impact on Blue Book[s])

• High Rate Uplink Coding: task is likely to come from finalized report of HRU WG (TBC).

• Support to Proximity-2 Working Group (TBC)

4. C&S Current+Future Work Items (2 of 2)


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 (extended till end of 2007)

• BOF Summary Situation:


Technical progress positive.

Future: see next slide


comment: work completed

SLS AREA REPORT

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


Work finalized in this meeting.

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).

Cross-Area presentation has been held. Design ideas of LEC solutions have been presented addressing both:

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

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

Next steps depends on CESG/Agencies decisions.

SLS PROPOSAL TO CREATE A LEC WG. LEC BOF TO PRODUCE A CHARTER

SLS AREA REPORT

SLS AREA REPORT

HRU WG

SLP WG

7. High Rate Uplink WG

Goal:

• Address Agency 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


7. High Rate Uplink WG (cnt’d)

WG Summary progress:

• Discussion on current uplink requirements and constraints presented by Matt Cosby/Victor Sank.

• Fabrizio Pollara provided an update to the performance

characteristics of LDPC codes for use on the uplink.

• General discussion on how this WG should parcel out assigned tasks related to HRU to the RF&MOD WG, Coding & Sync WG, and Space Link Protocols WG.

SLS AREA REPORT



Problems and Issues:

• Ensure that the future work needed to augment the aging CCSDS Telecommand recommendations (BCH code, TC frame, etc) with more advanced coding, modulation, and link layer protocols be allowed to proceed

SLS AREA REPORT



Planning :

• ESA to deliver a Mission Profiles White paper to the WG by 15 January, 2008 describing the future new requirements for uplink. NASA to provide inputs for this white paper as well. Same date.

• Fabrizio Pollara (NASA/JPL) to deliver a CCSDS White book on uplink coding. One chapter for high rate and one chapter for low rate before the Spring 2008 meeting.

• Charter to be updated

SLS AREA REPORT


5. 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 Space Packet Protocol draft GB to Green book

• Generate Encapsulation Service pink sheets for Fill Packet. Also include Technical Corrigendum for AOS and TM Space Data Links with respect to Fill Packet.

• APID definition resolution

• WG Status: Active X Idle ____

WG Summary Situation:status: OK CAUTION PROBLEM


SLS AREA REPORT


5. SLS-SLP WG (cnt’d)SLS-SLP Summary progress:

• Takahiro Yamada answered the questions concerning:• Draft Space Data Link Protocol GB (delivered at this meeting)• Overview Space Communications protocol GB (delivered at this

meeting)• Space Packet Protocol GB ( due a few weeks after this meeting)

• Encapsulation Service pink sheets covering Fill packets to be added by Greg Kazz/Marjorie Delandelong. Also pink sheets to Fill packet sections of AOS and TM will also be provided to Secretariat.

• Changes presented by Gian Paolo Calzolari on resolving the APID definition in the SPP were accepted by the Working Group. Pink sheets to be produced.

SLS AREA REPORT


5. SLS-SLP WG (cnt’d)

Problems and Issues:

• No other additional problems or issues.

SLS AREA REPORT



Planning :

• Provide pink sheets to Encapsulation Service• Provide Pink sheets to AOS and TM Space Data Link Protocols• Provide all 3 GBs to CCSDS Secretariat• Provide Pink sheets for Space Packet Protocol

SLS AREA REPORT



Resolutions :

1) Request again that the a) Space Data Link protocol Version 1.0 GB and b) Space Data Communications Protocol Version 2.0 GB and c) Space Packet Protocol GB Version 1 be published as green books on the CCSDS web site.

2) Request that pink sheets be circulated for agency review on the Fill packet description for the Encapsulation Service

3) Request that pink sheets be circulated for agency review on the APID definition for SPP BB

4) Request that pink sheets be circulated fro agency review on the fill packet and CRC definition for AOS and TM SDLP

SLS AREA REPORT


SLS AREA REPORT

MHDC WG

8. Multispectral & Hyperspectral Data Compression (MHDC) WG

Goals:

• Establish selection criteria and requirements matrix for lossless and lossy compression standard(s).

• Establish a set of test data for testing and evaluation of candidate compression algorithms.

• Evaluate candidate algorithms

• Develop recommendation together with supporting information (simulation software, test data sets, and Green Book).

Working Group Status: Active X Idle ____



comment: very good progress

SLS AREA REPORT


8. MHDC WG (con’t)

WG Summary progress:• Established requirements matrix

• Established selection criteria

• Collected several data sets for testing & evaluation; Identified four additional data sets to be added

• Discussed concept papers for candidate compressors from CNES, ESA, NASA, CSA

• New members: Zhongwei Zhang (CAS), Rodney Grubbs (NASA MSFC)

• Participated in Motion & Imagery Applications BOF (SIS)

• Discussed likelihood of standardizing lossless compressor before lossy compressor; “one-size-fits-all” solution appears unlikely

SLS AREA REPORT

Problems and Issues:• None


8. MHDC WG (con’t)

Planning :• 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

SLS AREA REPORT

Resolutions :

• None.


SLS AREA REPORT

C. INTRA & CROSS-AREA TECHNICAL ISSUES

Wireless BOFRefocused on intra-satellite links

Time code BOF

Requirements to be submitted by agencies (Jan 08)

Reported by SEA

SLS AREA REPORT

D. OTHER ISSUES

1. FUTURE PLANS

2. NEW BOFS

1. Future Plans

Mission Profiles

SLS AREA

D. OTHER ISSUES

Mission Profiles Preparing for the future. Targets need to be clearly identified

Need for top-down approach: identify requirements

SLS proposes to develop a white book on profiles that are not satisfied with current CCSDS BBs

The white book will be a living document (moving targets)

New Future Mission Profiles BOF to be discussed at Spring 2008 meeting

Following slides : examples mission profiles not fully covered with current SLS books

SLS AREA

1. Future Plans

D. OTHER ISSUES

Relay Satellite

Relay Satellite

Mission Profiles - Moon

B

C

High Rate Uplink

High Rate

Downlink

High Rate Uplink

High Rate Downlink

Prox-1 / Prox-2

HRU

HRD

PROX

SLP

C&S

RFM

22GHz

22GHz

26GHz

26GHz

High Rate D/L

L1/L2

Mission Profiles – Deep Space & Quasi-Deep Space

Mars HRD

SLPC&SRFM

32GHz

26GHz

32GHz

Mission Profiles – Near Earth

High Rate D/L

SLPC&SRFM

High Rate Uplink

HRU

HRD

8/26 GHz

2 GHz

SLS AREA

Authentication Protocol BOF

2. New BOFs

D. OTHER ISSUES

Optical Modulation & Coding BOF

Authentication / Encryption (1/3)

SLS AREA

Security WG is almost ready to output two recommended practices :

authentication algorithm

encryption algorithm

No work on TC authentication or encryption protocol scheduled in security WG

Strong demand from commercial S/L operators for standard TC authentication protocol

SLS & SEA area should tackle this work item


SLS AREA

Objectives (1/2) :

develop TC authentication protocol (based on TC space data link protocol)

involve in the process TT&C knowledgeable persons from security WG

capitalize on solutions developed for dual-use missions (like Galileo, Pleiades-HR, …) since TC authentication protocol is very safety critical


SLS AREA

Objectives (2/2) :

create a BOF with 3 work items :

review the authentication and encryption algorithms red books

gather operational requirements for TC security protocol

establish charter for WG (or specify work item to be added to SLP WG charter)

M. Cosby (QinetiQ/BNSC), given his background in secure TC links, could lead this work item ?

Optical Mod & Coding BOF

Goals

Develop a table of optical mission profiles

Develop baseline requirements for the forward error correction (FEC) coding and modulation needed for each mission profile

Establish charter for OMC WG

Schedule

Spring 2008. White paper on application profiles.

Fall 2008. Report on baseline requirements validated by at least two agencies.

Spring 2009. If enough interest has been generated, develop a charter for a WG or include scope in existing Coding & Synchronization WG.

SLS AREA

SLS AREA REPORT


1. RFM WG

Resolve 1: raise CCSDS 401 recommendations 2.4.12A/B, 2.4.20B and 2.6.8B to blue status;

Resolve 2: initiate agency review of CCSDS 401 pink recommendations 2.2.3, 2.4.2 and 2.4.17A/B;

Resolve 3: retire CCSDS 412.0-G to historical status;

Resolve 4: approve RFM WG revised charter (deletion of 412 updating activities).

2. RNG WG

Resolve 1: for approval of RNG WG charter update.

3. TCC WG

Resolve 1: Closure of TCC WG

SLS AREA REPORT


4. C&S WG

Resolve 1: publish DVB-S2 OB;

Resolve 2: publish pink sheets on CRC clarification on books:– CCSDS 132.0 = TM SPACE DATA LINK PROTOCOL– CCSDS 732.0 = AOS SPACE DATA LINK PROTOCOL– CCSDS 232.0 = TC SPACE DATA LINK PROTOCOL– CCSDS 133.0 = SPACE PACKET PROTOCOL

for agency review

Resolve 3: publish pink sheets on CRC clarification on book CCSDS 211.2

SLS AREA REPORT


5. SLP WG

Resolve 1: that the a) Space Data Link protocol Version 1.0 GB and b) Space Data Communications Protocol Version 2.0 GB and c) Space Packet Protocol GB Version 1 be published as green books

Resolve 2: that pink sheets be circulated for agency review on the Fill packet description for the Encapsulation Service

Resolve 3: that pink sheets be circulated for agency review on the APID definition for SPP BB

Resolve 4: that pink sheets be circulated for agency review on the fill packet for AOS and TM SDLP

1 Space Link Services Area report to CESG/CMC Darmstadt, Germany, 9 October 2007 J.L. Gerner / G. Moury.

Documents

slidesls area reportstatus

areasummary technical

telecommand channel

coding synchronization

white book issue

b white

issue red book

good progressrfm wg