Projects

Overview
Project Title	Improved Coding Schemes for the Proximity Link
Approval	Approved
Document Number	211.2
Charter	5.02 Space Link Coding and Synchronization Working Group
Document Type	Blue
Description of Document	CCSDS 211.2-B: Proximity-1 Space Link Protocol—Coding and Synchronization Sublayer. Blue Book. This Recommendation specifies Proximity space links. This Recommendation contains the Coding and Synchronization Sublayer specification originally published as part of CCSDS 211.0-B-1, Proximity-1 Space Link Protocol. Objective of this Project is to propose the addition of Improved Coding Schemes as the LDPC code AR4JA (1024,1/2) to the Proximity‐1 Coding and Synchronization Sublayer. The rationale for the addition is to employ a code which provides a significant improvement (2‐3 dB) more than the current Proximity‐1 coding scheme (Convolutional only). The ultimate goal is to enhance the data return on the Proximity‐1 link by at least 30% to 40% over the current baseline without major impact to the existing Prox‐1 protocol and installed base. Backward compatibility will also be ensured.
Applicable Patents	There are patent issues in this work area, but appropriate ISO forms have been submitted indicating RAND licensing policy by the patent holder or licensor (explain in comments).
Patent Comments	United States Patents 7343539 (ARA type protograph codes) and 7499490 (Encoders for block-circulant LDPC codes) are applicable. These patents are also applicable to CCSDS 131.0 and the signed ISO patent declaration form for US Patents 7343539 and 7499490 has been already provide for ""CCSDS 131.0 TM channel coding blue book; i.e. the identified patent issues are covered by signed ISO patent declaration forms indicating RAND license terms.
Survey of Similar Standards Documents or Projects Undertaken in Other Bodies and elsewhere in CCSDS
Resources
Book Editor	ESA
Book Editor Resources	WG Chair
Prototype 1	NASA
Prototype 1 Resources	NASA
Prototype 2	NASA
Prototype 2 Resources	NASA
Prototype 3
Prototype 3 Resources
Contribute
Monitor Only	CNES, DLR, UKSA
Resource Comments

Schedule

Legend for Schedule Milestones = Required for Orange Books = Required for Green Books = Required for Magenta Books = Required for Blue Books Note - Red Books are Draft Blue/Magenta Books Schedule Milestones	Original Completion Date (Date in M/D/YYYY format.)	Comments (Date in M/D/YYYY format.)
Project Approved	4/4/2011
Project Start Date	7/30/2011
Internal WG Review
First Draft Circulated to WG	4/4/2011	Preliminary discussion held at Spring 2011 Berlin
First Draft Comments Due	5/15/2011
Second draft circulated to WG	6/15/2011
Second Draft Comments Due	9/30/2011	for discussion at Fall 2011 Meeting
Final WB Submitted to AD for Further Processing	11/15/2011	Pink Sheets, not White Book
External Milestones
Secretariat Document Processing	11/30/2011	Agency review started on 19 March 2012, ending 1 June 2012
First Agency Review	2/28/2012	RIDs collected
RID Resolution	4/20/2012	Delayed by discussion on (P)ICS
Secretariat Document Processing 2	5/1/2012	CESG-P-2013-11-008
Final Agency Review		NOT needed
RID Resolution		NOT needed
First Prototype Development	3/1/2012	See NASA.LDPCyellowV3.pdf for 131.0-B-2
Second Prototype Development	3/1/2012	See NASA.LDPCyellowV3.pdf for 131.0-B-2
CMC Approval	5/15/2012	CMC-P-2013-12-007
Total Time to Complete (in months)	9