oSIST prEN 16603-50-25:2021

Space engineering - Adoption Notice of CCSDS 232.0-B-3, TC Space Data Link Protocol

This document identifies the clauses and requirements modified w ith respect to the standard CCSDS 131.0-B-3, TM Synchronization and Channel Coding, Issue 3, September 2017 for application in ECSS.

Raumfahrttechnik - Adoption Notice von CCSDS 232.0-B-3, TC Space Data Link Protocol

Ingénierie spatiale - Notice d’adoption de la CCSDS 232.0-B-3, TC Space Data Link Protocol

Le présent document identifie les paragraphes et exigences modifiés par rapport à la norme CCSDS 232.0-B-3, TC Space Data Link Protocol, édition 3, septembre 2015 en vue d'une application dans le cadre de l'ECSS.

Vesoljska tehnika - Sprejem obvestila CCSDS 232.0-B-3, protokol vesoljske podatkovne povezave TC

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Sep-2021
• ICS: 49.140 - Space systems and operations
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Jul-2022
• Due Date: 17-Sep-2022
• Mandate: M/496 - Mandate addressed to CEN, CENELEC and ETSI to develop standardisation regarding space industry (Phase 3 of the process)
• Ref Project: EN 16603-50-25:2022 - Space engineering - Adoption Notice of CCSDS 232.0-B-3, TC Space Data Link Protocol

RELATIONS

• Replaces: SIST EN 16603-50-04:2015 - Space engineering - Space data links - Telecommand protocols, synchronization and channel coding
• Effective Date: 13-Jul-2022
• Revised: SIST EN 16603-50-04:2015 - Space engineering - Space data links - Telecommand protocols, synchronization and channel coding
• Effective Date: 15-Dec-2021

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 16603-50-25:2021
01-september-2021
Vesoljska tehnika - Sprejem obvestila CCSDS 232.0-B-3, protokol vesoljske
podatkovne povezave TC, številka 3, september 2015
Space engineering - Adoption Notice of CCSDS 232.0-B-3, TC Space Data Link
Protocol, Issue 3, September 2015
Ta slovenski standard je istoveten z: prEN 16603-50-25
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
oSIST prEN 16603-50-25:2021 en,fr,de

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

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oSIST prEN 16603-50-25:2021
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oSIST prEN 16603-50-25:2021
EUROPEAN STANDARD
DRAFT
prEN 16603-50-25
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 49.140
English version
Space engineering - Adoption Notice of CCSDS 232.0-B-3,
TC Space Data Link Protocol, Issue 3, September 2015
Raumfahrttechnik - Adoption Notice von CCSDS 232.0-
B-3, TC Space Data Link Protocol, Ausgabe 3,
September 2015

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.
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Table of contents

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

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

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

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

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

Bibliography ............................................................................................................. 19

Tables

Table 4-1: Applicability table for CCSDS 232.0-B-3 ................................................................ 7

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European Foreword
This document (prEN 16603-50-25:2021) has been prepared by Technical
Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN
(Germany).
This document (prEN 16603-50-25:2021) originates from ECSS-E-AS-50-25C-
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
EN16603-50-04:2014.
The main changes with respect to EN16603-50-04:2014 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).
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Scope
This document identifies the clauses and requirements modified with respect to
the standard CCSDS 232.0-B-3, TC Space Data Link Protocol, Issue 3, September
2015 for application in ECSS.
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Context information
In the standard CCSDS 232.0-B-3, TC Space Data Link Protocol, CCSDS specifies a
data link layer protocol for the efficient transfer of space application data of
various types and characteristics over ground-to-space links. The
Communications Operation Procedure-1 (COP-1) specified in CCSDS 232.1-B-2
is used with the TC Space Data Link Protocol: it provides a mechanism for
delivery of frames in sequence and without gaps or duplication.
This Adoption Notice adopts and applies CCSDS 232.0-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.
The TC Transfer Frame specified in CCSDS 232.0-B-3 is similar to the TC
Transfer Frame specified in clauses 5 (Segmentation sublayer) and 6 (Transfer
sublayer) in the EN 16603-50-04:2014 (ECSS-E-ST-50-04) Space data links –
Telecommand protocols synchronization and channel coding.
EN 16603-50-04:2014 (ECSS-E-ST-50-04) 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 two 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)
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Abbreviated terms
Abbreviation Meaning
Communications Operation Procedure
COP
Frame Acceptance and Reporting Mechanism
FARM
Frame Data Unit
FDU
Global Virtual Channel Identifier
GVCID
Space Data Link Security
SDLS
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Application requirements

a. CCSDS 232.0-B-3, TC Space Data Link Protocol, Issue 3, September 2015 shall apply with the following modifications listed in Table 4-1.

Table 4-1: Applicability table for CCSDS 232.0-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)

4.1.1b Modified Transfer Frame Data Field (up to 1017 CCSDS requirement modified: Transfer Frame Data Field (up to

octets, mandatory); 1019 or 1017 octets, mandatory);
number “1019” deleted

4.1.1c Modified Frame Error Control Field (2 octets, CCSDS requirement modified: Frame Error Control Field (2 octets,

mandatory). word “optional” replaced by the optional).
word “mandatory.”
4.1.3.2.1.4 Modified NOTE 1 CCSDS existing NOTE is given a NOTE
new number – the content of the
(renumbered
note is unchanged
NOTE)
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4.1.3.2.1.4 Modified NOTE 2 – If the Packet Assembly New NOTE is added
Controller Function specified in 4.4.9 is
(new NOTE)
used, there can be Frame Data Units that
carry a MAP Reset command. In this case,
the Frame Data Unit consists of a Segment
Header only and the User Data field is
absent. See 4.4.9.4.
4.1.4.1.1 Modified Requirement deleted The Frame Error Control Field is
optional; its presence or absence
(deleted
shall be established by
requirement)
management.

4.1.4.1.2 Modified The Frame Error Control Field shall occupy CCSDS requirement modified: If present, the Frame Error Control

the two octets following, without gap, the words “if present” deleted. Field shall occupy the two octets

Transfer Frame Data Field. following, without gap, the
Transfer Frame Data Field.
4.1.4.1.3 Modified Requirement deleted If present, the Frame Error Control
Field shall occur within every
(deleted
Transfer Frame transmitted within
requirement)
the same Physical Channel
throughout a Mission Phase.
Note 2, below Modified NOTE deleted Whether this field should be used
4.1.4.1.3 on a particular Physical Channel
(deleted NOTE)
will be determined based on the
mission requirements for data
quality and the selected options for
the underlying Channel Coding
Sublayer.
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Note 1 in Modified The No Bit Lock Flag provides a CCSDS requirement modified: The No Bit Lock Flag is an optional,

4.2.1.8.3.1 performance quality indicator that indicates words “mission specific mission-specific engineering

(modified NOTE)

specifically whether the Physical Layer is engineering measurement that” measurement that provides a

working normally by having enough signal deleted. performance quality indicator that

energy to achieve bit synchronization with indicates specifically whether the
the received data stream. Physical Layer is working normally
by having enough signal energy to
achieve bit synchronization with
the received data stream.

4.2.1.8.3.2 Modified The No Bit Lock Flag shall be set as follows: CCSDS requirement modified to Use of the No Bit Lock Flag is

‘0’ when at least one of the spacecraft refer to spacecraft demodulation optional; if used,

demodulation units for the physical units for the physical channel. a) ‘0’ shall indicate bit lock has been

channel has achieved bit lock; Sentences “Use of the No Bit Lock achieved;

‘1’ when none of the spacecraft Flag is optional; if used, b) ‘1’ shall indicate bit lock has not

demodulation units for the physical a) ‘0’ shall indicate bit lock has been achieved.

channel has achieved bit lock. been achieved;
b) ‘1’ shall indicate bit lock has
not been achieved.”deleted.

4.2.1.8.3.3 Modified The No Bit Lock Flag shall always carry an CCSDS requirement modified to The single No Bit Lock Flag shall

actual report of the status of the physical refer to actual report of the status apply to all Virtual Channels and

channel, even when other fields in the of the physical channel. Sentense shall be updated whenever a

CLCW report the status of an inactive “The single No Bit Lock Flag shall change is signaled by the Physical

virtual channel. apply to all Virtual Channels and Layer.
shall be updated whenever a
change is signaled by the Physical
Layer”. deleted.
4.2.1.8.3.4 Modified Requirement deleted If the No Bit Lock Flag is not used,
it shall be set permanently to ‘0’.
(deleted
requirement)
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4.4.1.6 (new) New requirement When extracting and reconstructing New requirement added:

Packets from Frame Data Units, the Packet
added the Packet Assembly
Assembly Controller Function specified in
...