Apr12-cesg-1

Gian Paolo Calzolari (AD) Gilles Moury (DAD)

SPACE LINK SERVICES (SLS) AREA

Apr12-cesg-2

CURRENTLY ACTIVE WGs, BOFs & SIGs WITHIN AREA

1. RFM WG Radio Frequency & Modulation

2. C&S WG Coding & Synchronisation

3. SLP WG Space Link Protocols

4. NGU WG Next Generation Uplink

5. MHDC WG Multi/Hyperspectral Data Compression

6. SDLS WG Space Data Link Security (Joint with SEA)

7. OCM SIG Optical Coding and Modulation

8. PlaCom SIG Planetary Communications

SLS Area Report

Apr12-cesg-3

SLS Area Report B. Meeting Demographics

Plenary C/S SLP NGU RFM C/S+NGU NGU+C/S+RFM+SLP SDLS

PLACOM BoF

OCM SIG + Wrkshp MHDC

ASI

CNES 3 3 1 3 3 2 3 2 4 2 2

CNSA 8 3 2 8 5

CSA 1

DLR 1 2 3 2 2 2 6 1

ESA 4 6 2 3 4 3 7 3 5 3 4

INPE

JAXA 1 2

NASA 4 6 2 3 5 4 6 5 5 6 2

RFSA 2 1

UKSA 1

Other* 1

TOTAL 20 20 6 12 16 11 27 12 17 19 14

1 webex

*Taiwan Meeting Duration 0.5 1 1 0.5 1.5 0.5 0.5 1.5 0.5 2 2.5 Agency Diversity 5 5 4 4 5 4 7 4 5 5 5

Apr12-cesg-4

SLS AREA REPORT RFM WG – Goals

Red recommendation on high rate telemetry and PN ranging; Red recommendation on 26 GHz modulations; Green Book on 2 GHz modulation for missions supported by data relay satellites; Pink recommendation on 32 GHz modulations; Pink recommendation 2.4.18 aligned with red recommendation on 26 GHz modulations; Red recommendation 2.4.21 (4D-8PSK impairments); Revised Prox-1 BB and draft GB; White recommendation on comms requirements in emergency

Apr12-cesg-5

SLS AREA REPORT RFM WG – Goals vs Status

Recommendation on high rate telemetry and PN ranging Additional independent work in progress, draft RED recommendation expected at Fall 2012 Recommendations on 26 GHz modulations for SRS Red 26 GHz ready for Agency Review along with two companion revised (pink) recs and one to be suppressed Green book on 2 GHz (CDMA) modulation for missions supported by data relay satellites Green book being drafted, expected to be ready for CESG/CMC Approval before Cleveland meeting Recommendation on 32 GHz modulations Revised rec (pink) ready for Agency Review along with companion revised (pink) rec Recommendation on 8 GHz modulation for EESS (2.4.18) No input for this meeting – DVB-S2 based Blue Book not yet available Recommendation on 4D-8PSK TCM impairments

No input for this meeting – resource problem Prox-1 PL BB Under Agency Review

Apr12-cesg-6

RFM WG – Goals vs Status

White recommendation on comms requirements in emergency No input for this meeting – NGU requirements formulated: no changes expected to 401 BB

RFM WG Summary

Some activities (26 and 32 GHz SRS modulations, CDMA green book, high rate TLM and PN RNG, Prox-1 PL BB) are approximately on schedule;

Some activities (revised EESS recs, 4D-8PSK TCM impairments, emergency communications) are behind schedule since no inputs were submitted.

SLS AREA REPORT

status: OK CAUTION PROBLEM comment: Some delays

experienced due to technical issues and missing resources

Apr12-cesg-7

SLS AREA REPORT

RFM WG – Resolutions

Recommendations on 26 GHz modulations Submit to Agency Review Red rec 2.4.XX Submit to Agency Review Pink rec 2.3.2 Submit to Agency Review Pink rec 2.4.12A Suppress Blue rec 3.3.3A Recommendation on 32 GHz modulations Submit to Agency Review Pink rec 2.4.20B Submit to Agency Review Pink rec 2.4.12B

Apr12-cesg-8

C&S: Coding & Synchronization WG

• Achievements before this meeting:

• Published CCSDS 131.2-B-1 Flexible Advanced Coding and Modulation Scheme for High Rate Telemetry Applications

SLS AREA REPORT

status: OK CAUTION PROBLEM comment: Good progress

Apr12-cesg-9

C&S: Coding & Synchronization WG - Working Group Summary progress (1 of 3)

DVB-S2 Standardization

In Berlin (Spring 2011), WG reached consensus on a WG resolution for starting Agency Review.

CNES editorial update pending till this meeting where a Streamlined version has been provided and discussed. A few editorial improvements have been identified and will be implemented soon by CNES.

WG Consensus confirmed WG resolution for starting Agency Review

Proximity-1 Review & Upgrade

Agency Review of the 3 Pink Books just started with deadline 1st of June 2012.

This would need discussing RIDs in the Summer 2012 with possible finalization before or at Fall 2012 Meeting.

SLS AREA REPORT

Apr12-cesg-10

C&S: Coding & Synchronization WG - Working Group Summary progress (2 of 3) TC Green Book 230.1-G Green Book Update

After the Introduction of TC Repeated Transmission in coordination with the Space Link Protocol WG, a few additional improvements and corrections have been approved in this meeting. (Similar SLP activity ongoing for updating 130.2-G Space Data Link Protocols Summary of Concept and Rationale Green Book)

Resolution for publication issued and book with CCSDS Editor. (Also true for 130.2-G)

TM Coding Green Book

Very good progress with latest changes agreed in this meeting

Agreement for issuing Green 2 deferring to Green 3 (or to separate book[s]) the SCCC and DVB-S2 material

Resolution for publication of Green 2 will be issued after update (forecast before end of May 2012)

SLS AREA REPORT

Apr12-cesg-11

C&S: Coding & Synchronization WG - Working Group Summary progress (3 of 3)

Long Erasures Codes

DLR presented an updated draft Orange Book On the use of Erasure Coding for CCSDS space missions. Progress not very fast.

New version will be discussed at Fall 2012 Meeting with increased level of detail.

Short (64, 128, 256 bit ) LDPC codes for uplink - Orange Book

NASA are producing an Orange Book on “Short-Blocklength LDPC Codes” suitable for emergency and low data rate uplink. They would provide improvement over the existing BCH codes.

Draft version discussed in this meeting. It will be updated, possibly with better codes.

SLS AREA REPORT

Apr12-cesg-12

SLS Space Link Protocols (SLP) WG

Goals: 1. Preliminary RID resolution of 5-year review version of Prox-1 Space

Data Link Protocol 2. Determine Impact of 5-year review on Proximity-1 Green Book 3. Pending AOS/TM approved pink sheets and their 5-year review 4. Review the NASA proposal for a singular all encompassing CCSDS Link

Layer protocol

status: OK CAUTION PROBLEM comment: Good progress

SLS AREA REPORT

Apr12-cesg-13

SLP WG Summary Progress:

• Preliminary RID resolution of Prox-1 Space Data Link Layer Protocol • Consensus reached on RIDs submitted by Keith Scott SIS AD • Agency review continues until June 1 – thereafter WG telecon will take place

to dispose any remaining RIDs submitted • UK Space Agency also to provide as RID updated PICS Proforma based upon

work already completed by NASA/ESA Mars 2016/Exomars teams • Updates to Proximity-1 Green Book due to 5- year review of Prox-1 Blue books

• CRC-32 and other material available • UK Space Agency to supply Lessons Learned Annex based upon Prox-1

interoperability testing between ESA and NASA missions • Pending AOS/TM previously approved pink sheets and 5-year Review

• WG Approved AOS & TM 2008 pink sheets exist (OID frame etc) • New short sections in AOS, TM, TC Space Data Link books needed to identify

the required use and reference emerging SDLS protocol (especially interpretation of frame length field in TC)

• NASA presented a proposal for a single future all encompassing link layer protocol to be used by all future missions • Merges the best of all the CCSDS link layer protocols into one

SLS AREA REPORT

Apr12-cesg-14

SLS-SLP WG (cnt’d) Problems and Issues: • If PICS Proforma can be easily supplied for Proximity-1 book, then introducing

them into the specifications may be feasible.

Planning:

• Telecons to be held in Summer 2012 to resolve Prox-1 RIDs • Updated Proximity-1 GB to be reviewed at Fall 2012 meeting • New SLP Project: 5-year Review of AOS Space Data Link Protocol + SDLS Rqmt • New SLP Project: 5-year Review of TM Space Data Link Protocol + SDLS Rqmt • New SLP Project: Review of TC Space Data Link Protocol for SDLS Rqmt • WG encouraged to continue solidifying concepts of a single unified link layer

protocol

SLS AREA REPORT

Apr12-cesg-15

Next Generation Uplink (NGU)

Goal: • Review Version 2 of NGU Green Book on functionality, performance, application

profiles, trade offs, etc. for Next Generation Uplink • Verify consensus on whether or not WG is willing to propose upgrade to the CCSDS

Telecommand Standard based upon NGU recommendations – NASA/JPL • Review the latest version of the NASA Draft Orange book for Short LDPC Codes for

uplink • Present latest work on NASA non-binary LDPC codes for uplink comparing DLR Turbo

codes status: OK CAUTION PROBLEM comment: Good progress

SLS AREA REPORT

Apr12-cesg-16

NGU WG Summary Progress • Version 2 of NGU Green Book on the CWE

• Book was updated to include scope, rational, application profiles, and trade-offs performed to date, and performance data. DLR material to be integrated before Fall 2012.

• NASA presented White Paper on proposed NGU upgrades to TC Sync & Channel Coding

• Current TC standard is out-of-date compared to current state of the art. Some current missions (NASA MSL, Solar Probe and potentially ESA Euclid) have identified benefits of having a better performance uplink.

• Minimum changes to the standard would be to add additional uplink codes such as LDPC to profit from the performance gains. Other potential changes include use of a larger message start sequence to aide in synchronization, and use of a signaling byte to signal the end of the CLTU instead of the use of a failed code word.

• In order to facilitate comparisons, SLS AD made the “let’s preserve terminology” presentation so that performance and functionality of the current TC vs the proposed TC changes could more easily be compared. WG concurred.

• NASA presented status and results on short LDPC codes for uplink

• New non-binary NASA LDPC code performance is approx. 1 dB better than the binary ones – very comparable to the performance of the DLR Turbo codes for uplink presented in Fall 2011 meeting.

• However the non-binary codes are approx. 64x more complex than the binary ones making them less attractive at this time for implementation. This work is on-going.

SLS AREA REPORT

Apr12-cesg-17

NGU WG Summary Progress Planning :

• Incorporate comments and complete NGU Green book by Fall 2012 meeting

• Propose new project to SLS-C&S to recommend upgrades to TC Sync & CC standard to determine a new CLTU format (e.g. LDPC encoded) in addition to the traditional BCH CLTU. This requires investigating e.g.

• Applicable Coding Scheme (including performances, complexity, randomization, etc.)

• Required Message Start Sequence

• Required Message Tail Sequence

• Continue study of NASA and DLR short length LDPC codes for uplink

SLS AREA REPORT

Apr12-cesg-18

Multispectral & Hyperspectral Data Compression (MHDC) WG

1. Lossy Compression

• Reviewed compression performance results for candidate lossy compression algorithms

• Selected a lossy approach for standardization: pre-processing spectral transform extension to existing CCSDS-122B Image Data Compression (current work)

• Lossy extension to CCSDS-123B (lower complexity) is being pursued under ESA leadership (possible future work)

2. Reviewed draft text submitted for lossless Green Book (supporting CCSDS-123B)

3. CMC Polls for 123.0-B Lossless Multispectral & Hyperspectral Image Compression and updated 121.0-B-2 Lossless Data Compression

Working Group Status: Active X Idle ____

status: OK CAUTION PROBLEM

comment: Good progress

SLS AREA REPORT

Apr12-cesg-19

SLS AREA REPORT

MHDC WG (con’t) Problems and Issues: • Lost CSA WG participant

Planning : • Lossless Green Book:

• Additional text and revisions to be delivered (Fall meeting)

• Lossy Compressor

• Extensions to 122B to support pre-processing transform to be identified (July) and reviewed by WG (Aug)

• White Book to be produced defining spectral preprocessing transforms (Fall meeting)

Apr12-cesg-20

Space Data Link Security (SDLS) WG Working Group Status: Active - Progress report: 1. SDLS core protocol

• Dispositioned all RIDs from agency review #2 of red-2 : no significant technical changes

• WG proposes to finalize draft SDLS Blue Book and submit to CESG/CMC approval for publication (once interoperability testing is performed)

• Interoperability testing: • CNES simulator development started – protocol validation results expected

end 2012. Test plan to be finalized by mid 2012. • Second independent implementation still to be started : ESA ? NASA ? DLR ?

• SDLS core protocol green book : 75% complete – target is to publish with BB 2. SDLS extended procedures : User Requirements and outline of future

recommendation agreed. Discussion of proposals for directives.

SLS AREA REPORT

status: OK CAUTION PROBLEM

comment: Good progress Interoperability testing

Apr12-cesg-21

SLS AREA REPORT

Space Data Link Security (SDLS) protocol (cont’d) Problems and Issues: • no firm commitment for development of second independent implementation of core protocol : could delay even further SDLS blue book publication • update of TC/TM/AOS SDLP blue book so that they refer to SDLS for secure mode and incorporate any necessary requirements for operation in secure mode.

Planning: • SDLS core protocol:

• Final draft blue book for CESG/CMC approval, ready by June 2012 • Final draft green book for CESG/CMC approval, ready by end 2012 • Interoperability testing: nov 2012 – fev 2013 • Blue book publication : march 2013

• SDLS extended procedures: • Red-1 expected mid 2013 • Blue book mid 2014

Apr12-cesg-22

SLS-OCM: Optical Coding & Modulations (SIG) Goals:

• Provide a discussion forum for cooperation and cross-support

• Prepare creation of a WG

status: OK CAUTION PROBLEM

comment: Future depends on IOAG recommendations

SLS AREA REPORT

Summary Progress: • IOAG/OLSG interim report was reviewed (final report is expected for Fall 2012) • Concept paper is left open for future possible updates • OCM workshop: update of agencies’ activities on optical communications. • Still no consensus on whether standardization should start now and what should

be standardized (wavelength?, Coding and modulation?) Planning: • OCM SIG will move towards BoF and WG if IOAG recommends to start

standardization. • OCM SIG activities will stop (or be significantly reduced) if IOAG does not

recommend standardization.

Apr12-cesg-23

SLS Planetary Surface Communications (PLACOM) SIG

Goal: • Survey and report on agencies needs and planning for lunar and Martian local

communications/navigation infrastructure (surface coms/nav and surface-orbit coms/nav)

• Establish a preliminary coarse inventory of communications/navigation requirements (URD)

• Identify the way forward, e.g. proposal for the creation of a WG, type of book needed (recommended standard, recommended practice, …)

status: OK CAUTION PROBLEM comment: X Difficult to gather

information

SLS AREA REPORT

PLACOM SIG Summary Progress: • Member agencies lunar/martian exploration plans on hold or under redefinition; No new

input provided at this meeting but expected before Fall’12 meeting • Report provided on exploration relays requirements and on frequency bands for proximity

links • Action taken by several agencies to put together user requirements on comms and nav by the

Fall’12 • Decision on way forward (e.g. Creation of a WG) at the Fall meeting

Apr12-cesg-24

A. ACTION TO BE COMPLETED WITHIN AREA

1. CMC-A-2011-11-04 CESG to review SC 13 liaisons to other groups

2. CMC-A-2011-11-06 CESG to investigate and encourage telecons

SLS Area Report

Apr12-cesg-25

SLS REPORT

ACTION CMC-A-2011-11-04 CESG

CESG will review SC 13 liaisons to other groups in order to identify appropriate CCSDS individuals with technical expertise to fill the liaison role to the following groups: ISO/TC 46/SC 4 (Technical Interoperability), ISO/TC 46/SC 11 (Archives/Records Management), ISO/TC 211 (Geographic Information/Geomatics), and JTC 1/SC 32 (Data Management and Interchange). Required input: 1) Identify suitable CCSDS representatives who could be appointed as the CCSDS

side of potential liaisons with: ISO/TC 46/SC 4 (Technical Interoperability), http://www.iso.org/iso/iso_technical_committee.html?commid=48798 ; ISO/TC 46/SC 11 (Archives/Records Management), http://www.iso.org/iso/iso_technical_committee?commid=48856 ; ISO/TC 211 (Geographic Information/Geomatics), http://www.isotc211.org/ ; ISO/IEC JTC 1/SC 32 (Data Management and Interchange), http://jtc1sc32.org/

2) Review the current list of Liaisons and identify any that you think should be added. The list is at: http://public.ccsds.org/participation/liaisons.aspx

SLS Reply: No Group pertinent for SLS Area

Apr12-cesg-26

SLS REPORT

ACTION CMC-A-2011-11-04 CESG

CESG to investigate various approaches to encourage greater use of teleconferences for Working Groups, especially those that are currently not taking advantage of this technology. Rationale:

Please remind that CCSDS face-face meeting time is becoming an increasingly expensive and precious resource, and that all Working Groups are expected to be using these media between Plenary meetings so that they come fully prepared for face-face decisional meetings.

Required input:

Responses (indicating which WGs are/are not using inter-Plenary tele/web-conference) are due by the CESG meeting on Friday 20 April. To be included as a table in SLS Area report. SLS Reply: See table for SLS Area next page

Apr12-cesg-27

SLS WGs Telecon Usage SLS WG Input

C&S C&S is using telecons/webconferences between meetings whenever needed and appropriate; e.g. specially for finalization of reviews. For the Agency Reviews for LDPCC and SCCC several telecons were held. The same for DVB-S2 Red Book.

NGU+ SLP

Both NGU and SLP have used Telcons in the past to prepare and solidify positions before the CCSDS Plenary meetings. Of particular success have been the Proximity-1 Telecons to resolve issues concerning the 5-year review of all three Prox-1 blue books that are under Agency Review.

MHDC The MHDC WG held a teleconference in March to discuss WG progress and review the status of action items. The WG continues to make use of very productive email exchanges. Telecons will be held as needed.

RFM RFM WG makes limited use of teleconferences and webconferences between meetings. However, the group extensively uses email exchanges where working versions of documents intended for blue or green books are reviewed and edited with clearly identified track changes. This interactive approach leaves only a few points open for discussion at the face-to-face meetings that as such have squeezed in duration from a full week to 1.5 days. Telecons planned for this summer.

SDLS SDLS WG is holding one or two intermediate webex telecons in between two face-to-face meetings. Difficulty is to find a common period of time due to time differences between JPL and Europe,

Apr12-cesg-28

SLS REPORT

SLS Area vs. IOAG Priorities (Letter 13 March 2012)

Top Priorities: • LDPC codes (3 mission models): Two standards published

(LDPC + SCCC) with the third one (DVB-S2) to start Agency Review.

• Space Data Link Security Standard on the way to publication (pending on prototypes).

Priority 1, 2 and 3: No other SLS standard directly in IOAG Letter. SLS Reply: SLS Area is fully aligned with IOAG requirements

and priorities.