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Charters : 5.02 Space Link Coding and Synchronization Working Group

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Area

Chairperson

Chairperson E-Mail Address

Chairperson Agency

Deputy Chairperson

Deputy Chairperson E-Mail Address

Deputy Chairperson Agency

Mailing List

Scope of Activity

Rationale for Activity

Goals

Survey of Similar Standards Efforts Undertaken in Other Bodies and elsewhere in CCSDS

Patent Licensing Applicability for Future Standards

Technical Risk Mitigation Strategy

Management Risk Mitigation Strategy

Description of Change

Calzolari Gian Paolo (12/21/2010 3:04 AM): Latest change addresses the addition of the Orange Book on Erasure Correcting Codes for Near-Earth and Deep-Space Communications

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Name of Group

5.02 Space Link Coding and Synchronization Working Group

Area

Space Link Services Area (SLS)

Chairperson

Massimo Bertinelli

Chairperson E-Mail Address

Massimo.Bertinelli@esa.int

Chairperson Agency

ESA

Deputy Chairperson

Kenneth Andrews

Deputy Chairperson E-Mail Address

andrews@shannon.jpl.nasa.gov

Deputy Chairperson Agency

NASA

Mailing List

sls-cc@mailman.ccsds.org

Scope of Activity

This working group will concentrate on creating, maintaining and updating the set of Channel Coding Books to incorporate recommended coding scheme for Telemetry, Telecommand and Proximity-1 links.

Rationale for Activity

In order to establish a common framework within which the Agencies may develop standardized services for Telemetry, Telecommand and Proximity-1 links, the CCSDS advocates adoption of a layered systems architecture. Within this approach, the Coding and Synchronization Layer has the purpose of protecting higher layer data units (i.e. "frames") against errors induced during transmission through the physical path to/from a spacecraft. The Coding layer shall satisfy the System requirement for the error-free delivery of data units to the receiving end upper layer. It shall satisfy this task by encoding the user data from the layer above to protect them against noise-induced errors during transmission through the underlying radio frequency channel and by using suitable synchronization techniques to allow proper identification of the individual data units.. In addition the wide range of environment (space-Earth or space-space, near Earth congested bands and deep space link operations in extreme conditions of SNR, links dependent of atmospheric conditions in the new high frequency bands, optical links) requires coding systems with different levels of power efficiency and bandwidth efficiency, or different levels of link reliability or delivered data quality. Additionally, harsh environment impairments such as out-of-synchronization events, adverse weather conditions, and optical link turbulence demand for the application of higher-layer coding techniques, actually complementing the lower layers channel coding schemes.

Goals

The targets mentioned above shall be achieved by defining the methods by which data can be sent from a source to a destination such that distinct messages can be easily distinguishable from one another and their reconstruction can be performed with low error probability, thus improving the performance of the channel. The Coding and Synchronization WG shall provide/maintain standards to be applied to Telemetry, Telecommand and Proximity-1 links to allow Agencies to implement the most appropriate Coding & Synchronization procedures. The characteristics of the codes shall be specified only to the extent necessary to ensure interoperability and cross-support. Correct interaction with the procedures at the Data Link Procol and RF and Modulation layers shall be ensured too. These goals shall be achieved by updating the existing set of Channel Coding Books by either modifying existing books or creating new books as required and described in the WG Projects. Current goals/projects are:

Update TM channel coding Blue Book with LDPC Codes (COMPLETED)
Update TM channel coding green book with LDPC Codes etc (COMPLETED)
Blue Book for SCC Codes (COMPLETED)
Blue Book for DVB-S2 Codes (COMPLETED)
Magenta Book on TM Channel Coding Application Profiles (COMPLETED)
Orange Book on Erasure Correcting Codes for Near-Earth and Deep-Space Communications
Update of CCSDS 230.1-G, “TC Sync and Channel Coding Green Book” (COMPLETED)
Review Proximity-1 Coding and Synchronization Sublayer. Blue Book (5 years review) (COMPLETED)
Update Proximity-1 Coding and Synchronization Sublayer. Blue Book with Improved Coding Schemes (COMPLETED)
Orange Book on Short (64, 128, 256 bit ) LDPC codes for uplink
Update TM channel coding green book with SCC Codes
Update CCSDS 231.0-Blue Book with new channel coding schemes for the Telecommand (TC) link Update CCSDS 230.1-G Informational Report to add material relative to the new coding technique(s) as per updated CCSDS 231.0-Blue Book. Magenta Book for Variable Code and Modulation (VCM) Update TM channel coding Blue Book with LDPC slicing

Survey of Similar Standards Efforts Undertaken in
Other Bodies and elsewhere in CCSDS

Patent Licensing Applicability for Future Standards

YES - The WG is working on patented technologies for 3 items: LDPCC, SCCC and DVB-S2 

Technical Risk Mitigation Strategy

No technical risks have been identified.

Management Risk Mitigation Strategy

The schedule is very dependent upon Agency commitment of resources and the use of the same personnel working on concurrent CCSDS tasks.
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Note - To view "Draft" projects, which are not yet approved Click Here.

 Approved Projects

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Currently 19 Projects     
Document Type
Project Status
Project Phase
Modified By
Update TM channel coding Blue Book with LDPC CodesBlueAll Tasks CompletedProject CompletedCCSDS Tech Support 
Update TM channel coding green bookGreenAll Tasks CompletedProject CompletedCCSDS Tech Support 
Proximity-1 Space Link Protocol—Coding and Synchronization Sublayer - Issue 2BlueAll Tasks CompletedProject CompletedCCSDS Tech Support 
Revision of CCSDS 231.0-B-1 TC Synchronization and Channel Coding. Blue Book. Issue 1. September 2003.BlueAll Tasks CompletedProject CompletedCCSDS Tech Support 
Produce Blue Book for SCC CodesBlueAll Tasks CompletedProject CompletedCCSDS Tech Support 
Produce Blue Book for DVB-S2 CodesBlueAll Tasks CompletedProject CompletedCCSDS Tech Support 
Magenta Book on TM Channel Coding Application ProfilesMagentaAll Tasks CompletedProject CompletedCCSDS Tech Support 
Erasure Correcting Codes for Near-Earth and Deep-Space Communications OrangeAll Tasks CompletedProject CompletedCalzolari Gian Paolo 
Update of CCSDS 230.1-G, “TC Sync and Channel Coding Green Book”GreenAll Tasks CompletedProject CompletedCCSDS Tech Support 
Improved Coding Schemes for the Proximity LinkBlueAll Tasks CompletedProject CompletedCalzolari Gian Paolo 
Short (64, 128, 256 bit ) LDPC codes for uplink OrangeAll Tasks CompletedProject CompletedCCSDS Tech Support 
TM Channel Coding for DVB-S2, Green Book GreenAll Tasks CompletedProject CompletedCalzolari Gian Paolo 
Next Generation Uplink CodingBlueAll Tasks CompletedProject CompletedBrian Oliver 
Update TM channel coding Blue Book with LDPC slicingBlueAll Tasks CompletedProject CompletedBrian Oliver 
Proximity-1 Coding & Synchronization Sublayer Modification to support USLP Frame FormatBlueOn ScheduleProject not StartedKenneth Andrews 
TC Synchronization and Channel Coding -- Summary of Concept and Rationale, Issue 3 GreenOn ScheduleSecond draft circulated to WGMassimo Bertinelli 
CCSDS Space Link Protocols over ETSI DVB-S2X standardOrangeOn ScheduleSecond draft circulated to WGMassimo Bertinelli 
TM Channel Coding for SCCC, Green BookGreenOn ScheduleSecretariat Document ProcessingMassimo Bertinelli 
Variable Code and Modulation (VCM) Systems for CCSDSBlueOn ScheduleSecretariat Document ProcessingKenneth Andrews