Space engineering - Adoption Notice of CCSDS 231.0-B-3, TC Synchronization and Channel Coding

This document identifies the clauses and requirements modified with respect to the standard CCSDS 231.0-B-3, TC Synchronization and Channel Coding, Issue 3, September 2017 for application in ECSS.

Raumfahrttechnik - Adaption CCSDS 231.0-B-3, Telekommando-Synchronisation und -Kanalkodierung

Ingénierie spatiale - Notice d’adoption de la CCSDS 231.0-B-3, TC Synchronization and Channel Coding

Le présent document identifie les paragraphes et exigences modifiés par rapport à la norme CCSDS 231.0-B-3, TC Synchronization and Channel Coding, édition 3, septembre 2017 en vue d'une application dans le cadre de l'ECSS.

Vesoljska tehnika - Sprejem obvestila CCSDS 231.0-B-3, sinhronizacija TC in kodiranje kanalov

General Information

Status
Published
Public Enquiry End Date
30-Sep-2021
Publication Date
17-Jul-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jul-2022
Due Date
17-Sep-2022
Completion Date
18-Jul-2022

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SLOVENSKI STANDARD
SIST EN 16603-50-24:2022
01-september-2022
Nadomešča:
SIST EN 16603-50-04:2015
Vesoljska tehnika - Sprejem obvestila CCSDS 231.0-B-3, sinhronizacija TC in
kodiranje kanalov
Space engineering - Adoption Notice of CCSDS 231.0-B-3, TC Synchronization and
Channel Coding
Raumfahrttechnik - Adaption CCSDS 231.0-B-3, Telekommando-Synchronisation und -
Kanalkodierung

Ingénierie spatiale - Notice d’adoption de la CCSDS 231.0-B-3, TC Synchronization and

Channel Coding
Ta slovenski standard je istoveten z: EN 16603-50-24:2022
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
SIST EN 16603-50-24:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 16603-50-24:2022
---------------------- Page: 2 ----------------------
SIST EN 16603-50-24:2022
EUROPEAN STANDARD EN 16603-50-24
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2022
ICS 49.140
Supersedes EN 16603-50-04:2014
English version
Space engineering - Adoption Notice of CCSDS 231.0-B-3,
TC Synchronization and Channel Coding

Ingénierie spatiale - Notice d'adoption de la CCSDS Raumfahrttechnik - Adaption CCSDS 231.0-B-3,

231.0-B-3, TC Synchronization and Channel Coding Telekommando-Synchronisation und -Kanalkodierung

This European Standard was approved by CEN on 13 March 2022.

CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for

giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical

references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to

any CEN and CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,

Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,

Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2022 CEN/CENELEC All rights of exploitation in any form and by any means
Ref. No. EN 16603-50-24:2022 E
reserved worldwide for CEN national Members and for
CENELEC Members.
---------------------- Page: 3 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Table of contents

European Foreword ................................................................................................... 3

1 Scope ....................................................................................................................... 4

2 Context information................................................................................................ 5

3 Abbreviated terms .................................................................................................. 6

4 Application requirements ...................................................................................... 7

Bibliography ............................................................................................................. 16

Tables

Table 4-1: Applicability table for CCSDS 231.0-B-3 ................................................................ 7

---------------------- Page: 4 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
European Foreword

This document (EN 16603-50-24:2022) has been prepared by Technical Committee CEN-

CENELEC/TC 5 “Space”, the secretariat of which is held by DIN.
This standard (EN 16603-50-24:2022) originates from ECSS-E-AS-50-24C.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by January 2023, and conflicting national standards shall

be withdrawn at the latest by January 2023.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

EN 16603-50-24, EN 16603-50-25 and EN 16603-50-26 together supersede EN 16603-50-04:2014.

The main changes with respect to EN 16603-50-04:2014 are listed below:
- Replacement of document by three Adoption Notices.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association.

This document has been developed to cover specifically space systems and has therefore precedence

over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace).

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of

Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia,

Spain, Sweden, Switzerland, Turkey and the United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Scope
This document identifies the clauses and requirements modified with respect to
the standard CCSDS 231.0-B-3, TC Synchronization and Channel Coding, Issue 3,
September 2017 for application in ECSS.
---------------------- Page: 6 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Context information
In the standard CCSDS 231.0-B-3, TC Synchronization and Channel Coding,
CCSDS specifies synchronization and channel coding schemes, and the Physical
Layer Operations Procedures, for use with EN 16603-50-25 (ECSS-E-AS-50-25)
TC Space Data Link Protocol.
This Adoption Notice adopts and applies CCSDS 231.0-B-3 with a minimum set
of modifications, identified in the present document, to allow for reference and
for a consistent integration in the ECSS system of standards.
CCSDS 231.0-B-3 is similar to clauses 8 (Synchronization and coding sublayer)
and 9 (Physical layer) of the EN 16603-50-04:2014 (ECSS-E-ST-50-04C) Space data
links – Telecommand protocols synchronization and channel coding.
EN 16603-50-04:2014 (ECSS-E-ST-50-04) that is superseded by the following
three Adoption Notices: EN 16603-50-24 (ECSS-E-ST-50-24), EN 16603-50-25
(ECSS-E-AS-50-25) and EN 16603-50-26 (ECSS-E-AS-50-26).
Differences between these standards that are not covered by the normative
modifications in clause 4 are described in the informative Annex A.
Overview of superseded EN 16603-50-xx Standards
Superseded EN New EN Based on CCSDS
EN 16603-50-01:2014 EN 16603-50-21 CCSDS 131.0-B-3 (Sept. 2017)
EN 16603-50-03:2014 EN 16603-50-22 CCSDS 132.0-B-2 (Sept. 2015)
EN 16603-50-23 CCSDS 732.0-B-3 (Sept. 2015)
EN 16603-50-04:2014 EN 16603-50-24 CCSDS 231.0-B-3 (Sept. 2017)
EN 16603-50-25 CCSDS 232.0-B-3 (Sept. 2015)
EN 16603-50-26 CCSDS 232.1-B-2 (Sept. 2010)
---------------------- Page: 7 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Abbreviated terms
Abbreviation Meaning
Bose-Chaudhuri-Hocquenghem
BCH
Communications Link Transmission Unit
CLTU
Low-density Parity-check
LDPC
Physical Layer Operations Procedure
PLOP
Single Error Correction
SEC
---------------------- Page: 8 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Application requirements

a. CCSDS 231.0-B-3, TC Synchronization and Channel Coding, Issue 2, September 2010 shall apply with the following modifications listed in Table 4-1.

Table 4-1: Applicability table for CCSDS 231.0-B-3
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)

2.2.2 Modified The Frame Error Control Field (FECF) CCSDS informative section The Frame Error Control Field

(statement in defined in reference [1] is used to reduce modified: (FECF) defined in reference [1] may

informative the probability of undetected errors. be used to reduce the probability of

words “may be used” replaced by
section) undetected errors, particularly
words “is used”; words
when the modified BCH code is
“particularly when the modified
decoded in an error-correcting
BCH code is decoded in an error-
mode.
correcting mode”deleted.

3.5 Modified Codewords that have been encoded using CCSDS requirement modified: Codewords that have been encoded

the modified BCH code described in 3.3 SEC decoding not optional for using the modified BCH code

shall be decoded in an error correcting BCH; described in 3.3 may be decoded
mode (Single Error Correction, or SEC). In either in an error-detecting mode
Word “may” replaced by word
error-correcting mode, the code can correct (Triple Error Detection, or TED) or
“shall”. Words
one bit in error and can detect two bits in in an error correcting mode (Single
---------------------- Page: 9 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)
error. Error Correction, or SEC),
“either in an error-detecting mode
depending on mission
(Triple Error Detection, or TED)
requirements. When the error-
or” and words “depending on
detecting mode is chosen, one, two
mission requirements” deleted.
or three bits in error will be
Sentence “When the error-
detected within the codeword (not
detecting mode is chosen, one,
counting the appended Filler Bit);
two or three bits in error will be
when the error-correcting mode is
detected within the codeword
chosen, one bit in error will be
(not counting the appended Filler
corrected and two bits in error will
Bit); when the error-correcting
be detected.
mode is chosen, one bit in error
will be corrected and two bits in
error will be detected” deleted.
New sentence “In error-correcting
mode, the code can correct one bit
in error and can detect two bits in
error” added.

Table 5-1, in Modified Codewords, which are either free of error CCSDS text in Table 5-1 modified: Codewords, which are either free of

row S3 for or which can be corrected, are received, error or
(Text in a Table 5- randomization not optional both
State decoded, and derandomized, and their
1) for BCH and for LDPC. Words “if which can be corrected, are
Definition contents are transferred to the sublayer
necessary” deleted. received, decoded,
bullet 1 above
and derandomized (if necessary),
and their contents are transferred to
the sublayer above.

Note 1 below Modified When BCH code is used, the search for the CCSDS NOTE modified: SEC In the search for the Start Sequence

Table 5-2 Start Sequence in State 2 accepts a Start decoding not optional for BCH. in State 2, no error in the Start

(NOTE)

Sequence containing one error. Word “in” deleted and replaced Sequence is allowed if the modified

by words “when BCH code is BCH code is decoded in the error-
---------------------- Page: 10 ----------------------
SIST EN 16603-50-24:2022
EN 16603-50-24:2022 (E)
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)
used”. Words “no error in the detecting mode; one error in the
Start Sequence is allowed if the Start Sequence is allowed if the
modified BCH code is decoded in modified BCH code is decoded in
the error-detecting mode; one the error-correcting mode.
error in the Start Sequence is
allowed if the modified BCH cod
...

SLOVENSKI STANDARD
oSIST prEN 16603-50-24:2021
01-september-2021
Vesoljska tehnika - Sprejem obvestila CCSDS 231.0-B-3, sinhronizacija TC in
kodiranje kanalov, številka 3, september 2017
Space engineering - Adoption Notice of CCSDS 231.0-B-3, TC Synchronization and
Channel Coding, Issue 3, September 2017
Raumfahrttechnik - Adoption Notice von CCSDS 231.0-B-3, TC-Synchronisation und
Kanalcodierung, Ausgabe 3, September 2017
Ta slovenski standard je istoveten z: prEN 16603-50-24
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
oSIST prEN 16603-50-24:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 16603-50-24:2021
---------------------- Page: 2 ----------------------
oSIST prEN 16603-50-24:2021
EUROPEAN STANDARD
DRAFT
prEN 16603-50-24
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 49.140
English version
Space engineering - Adoption Notice of CCSDS 231.0-B-3,
TC Synchronization and Channel Coding, Issue 3,
September 2017
Raumfahrttechnik - Adoption Notice von CCSDS 231.0-
B-3, TC-Synchronisation und Kanalcodierung, Ausgabe
3, September 2017

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/CLC/JTC 5.

If this draft becomes a European Standard, CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal

Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any

alteration.

This draft European Standard was established by CEN and CENELEC in three official versions (English, French, German). A

version in any other language made by translation under the responsibility of a CEN and CENELEC member into its own

language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,

Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,

Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.Recipients of this draft are invited to submit, with their comments, notification

of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
---------------------- Page: 3 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Table of contents

European Foreword ................................................................................................... 3

1 Scope ....................................................................................................................... 4

2 Context information................................................................................................ 5

3 Abbreviated terms .................................................................................................. 6

4 Application requirements ...................................................................................... 7

Bibliography ............................................................................................................. 16

Tables

Table 4-1: Applicability table for CCSDS 231.0-B-3 ................................................................ 7

---------------------- Page: 4 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
European Foreword
This document (prEN 16603-50-24:2021) has been prepared by Technical
Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN
(Germany).
This document (prEN 16603-50-24:2021) originates from ECSS-E-AS-50-24C-
DIR1.
This document is currently submitted to the ENQUIRY.
EN 16603-50-24, EN 16603-50-25 and EN 16603-50-26 will together supersede
EN 16603-50-04:2014.
The main changes with respect to EN 16603-50-04:2014 are listed below:
- Replacement of document by three Adoption Notices.
This document has been developed to cover specifically space systems and will
therefore have precedence over any EN covering the same scope but with a
wider do-main of applicability (e.g. : aerospace).
---------------------- Page: 5 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Scope
This document identifies the clauses and requirements modified with respect to
the standard CCSDS 231.0-B-3, TC Synchronization and Channel Coding, Issue 3,
September 2017 for application in ECSS.
---------------------- Page: 6 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Context information
In the standard CCSDS 231.0-B-3, TC Synchronization and Channel Coding,
CCSDS specifies synchronization and channel coding schemes, and the Physical
Layer Operations Procedures, for use with EN 16603-50-25 (ECSS-E-AS-50-25)
TC Space Data Link Protocol.
This Adoption Notice adopts and applies CCSDS 231.0-B-3 with a minimum set
of modifications, identified in the present document, to allow for reference and
for a consistent integration in the ECSS system of standards.
CCSDS 231.0-B-3 is similar to clauses 8 (Synchronization and coding sublayer)
and 9 (Physical layer) of the EN 16603-50-04:2014 (ECSS-E-ST-50-04C) Space data
links – Telecommand protocols synchronization and channel coding.
EN 16603-50-04:2014 (ECSS-E-ST-50-04) that is superseded by the following
three Adoption Notices: EN 16603-50-24 (ECSS-E-ST-50-24), EN 16603-50-25
(ECSS-E-AS-50-25) and EN 16603-50-26 (ECSS-E-AS-50-26).
Differences between these standards that are not covered by the normative
modifications in clause 4 are described in the informative Annex A.
Overview of superseded EN 16603-50-xx Standards
Superseded EN New EN Based on CCSDS
EN 16603-50-01:2014 EN 16603-50-21 CCSDS 131.0-B-3 (Sept. 2017)
EN 16603-50-03:2014 EN 16603-50-22 CCSDS 132.0-B-2 (Sept. 2015)
EN 16603-50-23 CCSDS 732.0-B-3 (August 2016)
EN 16603-50-04:2014 EN 16603-50-24 CCSDS 231.0-B-3 (Sept. 2017)
EN 16603-50-25 CCSDS 232.0-B-3 (Sept. 2015)
EN 16603-50-26 CCSDS 232.1-B-2 (Sept. 2010)
---------------------- Page: 7 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Abbreviated terms
Abbreviation Meaning
Bose-Chaudhuri-Hocquenghem
BCH
Communications Link Transmission Unit
CLTU
Low-density Parity-check
LDPC
Physical Layer Operations Procedure
PLOP
Single Error Correction
SEC
---------------------- Page: 8 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Application requirements

a. CCSDS 231.0-B-3, TC Synchronization and Channel Coding, Issue 2, September 2010 shall apply with the following modifications listed in Table 4-1.

Table 4-1: Applicability table for CCSDS 231.0-B-3
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)

2.2.2 Modified The Frame Error Control Field (FECF) CCSDS informative section The Frame Error Control Field

(statement in defined in reference [1] is used to reduce modified: (FECF) defined in reference [1] may

informative the probability of undetected errors. be used to reduce the probability of

words “may be used” replaced by
section) undetected errors, particularly
words “is used”; words
when the modified BCH code is
“particularly when the modified
decoded in an error-correcting
BCH code is decoded in an error-
mode.
correcting mode”deleted.

3.5 Modified Codewords that have been encoded using CCSDS requirement modified: Codewords that have been encoded

the modified BCH code described in 3.3 SEC decoding not optional for using the modified BCH code

shall be decoded in an error correcting BCH; described in 3.3 may be decoded
mode (Single Error Correction, or SEC). In either in an error-detecting mode
Word “may” replaced by word
error-correcting mode, the code can correct (Triple Error Detection, or TED) or
“shall”. Words
one bit in error and can detect two bits in in an error correcting mode (Single
---------------------- Page: 9 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)
error. Error Correction, or SEC),
“either in an error-detecting mode
depending on mission
(Triple Error Detection, or TED)
requirements. When the error-
or” and words “depending on
detecting mode is chosen, one, two
mission requirements” deleted.
or three bits in error will be
Sentence “When the error-
detected within the codeword (not
detecting mode is chosen, one,
counting the appended Filler Bit);
two or three bits in error will be
when the error-correcting mode is
detected within the codeword
chosen, one bit in error will be
(not counting the appended Filler
corrected and two bits in error will
Bit); when the error-correcting
be detected.
mode is chosen, one bit in error
will be corrected and two bits in
error will be detected” deleted.
New sentence “In error-correcting
mode, the code can correct one bit
in error and can detect two bits in
error” added.

Table 5-1, in Modified Codewords, which are either free of error CCSDS text in Table 5-1 modified: Codewords, which are either free of

row S3 for or which can be corrected, are received, error or
(Text in a Table 5- randomization not optional both
State decoded, and derandomized, and their
1) for BCH and for LDPC. Words “if which can be corrected, are
Definition contents are transferred to the sublayer
necessary” deleted. received, decoded,
bullet 1 above
and derandomized (if necessary),
and their contents are transferred to
the sublayer above.

Note 1 below Modified When BCH code is used, the search for the CCSDS NOTE modified: SEC In the search for the Start Sequence

Table 5-2 Start Sequence in State 2 accepts a Start decoding not optional for BCH. in State 2, no error in the Start

(NOTE)

Sequence containing one error. Word “in” deleted and replaced Sequence is allowed if the modified

by words “when BCH code is BCH code is decoded in the error-
---------------------- Page: 10 ----------------------
oSIST prEN 16603-50-24:2021
prEN 16603-50-24:2021 (E)
Clause or Applicability Applicable text Comments Text as in the original
requirement document
(the new/added text is underlined)
number
(deleted text with strikethrough)
used”. Words “no error in the detecting mode; one error in the
Start Sequence is allowed if the Start Sequence is allowed if the
modified BCH code is decoded in modified BCH code is decoded in
the error-detecting mode; one the error-correcting mode.
error in the Start Sequence is
allowed if the modified BCH code
is decoded in the error-correcting
mode” deleted and replaced by
words ” accepts a Start Sequence
containing one error”

6.1.2 Modified The Pseudo-Randomizer defined in this CCSDS requirement modified In order to ensure proper receiver

section shall be used. randomization not optional for operation, the data stream must be

both BCH and LDPC. sufficiently random. The Pseudo-
Randomizer defined in this section
Sentence “In order to ensure
is the preferred method to ensure
...

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