ISO 22645:2016

INTERNATIONAL ISO
STANDARD 22645
Second edition
2016-11-15
Space data and information transfer
systems — TM (telemetry) space data link
protocol
Systèmes de transfert des données et informations spatiales — Protocole de
liaison de données spatiales TM (télémétrie)
Reference number
©
ISO 2016
©  ISO 2016
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ii © ISO 2016 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
ISO 22645 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as
CCSDS 132.0-B-2, September 2015) and was adopted (without modifications except those stated in
clause 2 of this International Standard) by Technical Committee ISO/TC 20, Aircraft and space
vehicles, Subcommittee SC 13, Space data and information transfer systems.
This second edition cancels and replaces the first edition (ISO 22645:2005), which has been technically
revised. It also incorporates the amendment ISO 22645:2005/Amd.1:2015.
CCSDS RECOMMENDED STANDARD FOR TM SPACE DATA LINK PROTOCOL
STATEMENT OF INTENT
The Consultative Committee for Space Data Systems (CCSDS) is an organization officially
established by the management of its members. The Committee meets periodically to address
data systems problems that are common to all participants, and to formulate sound technical
solutions to these problems. Inasmuch as participation in the CCSDS is completely voluntary,
the results of Committee actions are termed Recommended Standards and are not
considered binding on any Agency.
This Recommended Standard is issued by, and represents the consensus of, the CCSDS
members. Endorsement of this Recommendation is entirely voluntary. Endorsement,
however, indicates the following understandings:
o Whenever a member establishes a CCSDS-related standard, this standard will be in
accord with the relevant Recommended Standard. Establishing such a standard
does not preclude other provisions which a member may develop.
o Whenever a member establishes a CCSDS-related standard, that member will
provide other CCSDS members with the following information:
-- The standard itself.
-- The anticipated date of initial operational capability.
-- The anticipated duration of operational service.
o Specific service arrangements shall be made via memoranda of agreement. Neither
this Recommended Standard nor any ensuing standard is a substitute for a
memorandum of agreement.
No later than five years from its date of issuance, this Recommended Standard will be
reviewed by the CCSDS to determine whether it should: (1) remain in effect without change;
(2) be changed to reflect the impact of new technologies, new requirements, or new
directions; or (3) be retired or canceled.
In those instances when a new version of a Recommended Standard is issued, existing
CCSDS-related member standards and implementations are not negated or deemed to be non-
CCSDS compatible. It is the responsibility of each member to determine when such
standards or implementations are to be modified. Each member is, however, strongly
encouraged to direct planning for its new standards and implementations towards the later
version of the Recommended Standard.
CCSDS 132.0-B-2 Page ii September 2015
CCSDS RECOMMENDED STANDARD FOR TM SPACE DATA LINK PROTOCOL
FOREWORD
This document is a technical Recommendation for use in developing flight and ground
systems for space missions and has been prepared by the Consultative Committee for Space
Data Systems (CCSDS). The TM Space Data Link Protocol described herein is intended for
missions that are cross-supported between Agencies of the CCSDS.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CCSDS has processes for identifying patent issues and for securing
from the patent holder agreement that all licensing policies are reasonable and non-
discriminatory. However, CCSDS does not have a patent law staff, and CCSDS shall not be
held responsible for identifying any or all such patent rights.
Through the process of normal evolution, it is expected that expansion, deletion, or
modification of this document may occur. This Recommended Standard is therefore subject
to CCSDS document management and change control procedures, which are defined in
Organization and Processes for the Consultative Committee for Space Data Systems
(CCSDS A02.1-Y-4). Current versions of CCSDS documents are maintained at the CCSDS
Web site:
http://www.ccsds.org/
Questions relating to the contents or status of this document should be sent to the CCSDS
Secretariat at the e-mail address indicated on page i.
CCSDS 132.0-B-2 Page iii September 2015
CCSDS RECOMMENDED STANDARD FOR TM SPACE DATA LINK PROTOCOL
At time of publication, the active Member and Observer Agencies of the CCSDS were:
Member Agencies
– Agenzia Spaziale Italiana (ASI)/Italy.
– Canadian Space Agency (CSA)/Canada.
– Centre National d’Etudes Spatiales (CNES)/France.
– China National Space Administration (CNSA)/People’s Republic of China.
– Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Germany.
– European Space Agency (ESA)/Europe.
– Federal Space Agency (FSA)/Russian Federation.
– Instituto Nacional de Pesquisas Espaciais (INPE)/Brazil.
– Japan Aerospace Exploration Agency (JAXA)/Japan.
– National Aeronautics and Space Administration (NASA)/USA.
– UK Space Agency/United Kingdom.
Observer Agencies
– Austrian Space Agency (ASA)/Austria.
– Belgian Federal Science Policy Office (BFSPO)/Belgium.
– Central Research Institute of Machine Building (TsNIIMash)/Russian Federation.
– China Satellite Launch and Tracking Control General, Beijing Institute of Tracking and
Telecommunications Technology (CLTC/BITTT)/China.
– Chinese Academy of Sciences (CAS)/China.
– Chinese Academy of Space Technology (CAST)/China.
– Commonwealth Scientific and Industrial Research Organization (CSIRO)/Australia.
– Danish National Space Center (DNSC)/Denmark.
– Departamento de Ciência e Tecnologia Aeroespacial (DCTA)/Brazil.
– Electronics and Telecommunications Research Institute (ETRI)/Korea.
– European Organization for the Exploitation of Meteorological Satellites
(EUMETSAT)/Europe.
– European Telecommunications Satellite Organization (EUTELSAT)/Europe.
– Geo-Informatics and Space Technology Development Agency (GISTDA)/Thailand.
– Hellenic National Space Committee (HNSC)/Greece.
– Indian Space Research Organization (ISRO)/India.
– Institute of Space Research (IKI)/Russian Federation.
– KFKI Research Institute for Particle & Nuclear Physics (KFKI)/Hungary.
– Korea Aerospace Research Institute (KARI)/Korea.
– Ministry of Communications (MOC)/Israel.
– National Institute of Information and Communications Technology (NICT)/Japan.
– National Oceanic and Atmospheric Administration (NOAA)/USA.
– National Space Agency of the Republic of Kazakhstan (NSARK)/Kazakhstan.
– National Space Organization (NSPO)/Chinese Taipei.
– Naval Center for Space Technology (NCST)/USA.
– Scientific and Technological Research Council of Turkey (TUBITAK)/Turkey.
– South African National Space Agency (SANSA)/Republic of South Africa.
– Space and Upper Atmosphere Research Commission (SUPARCO)/Pakistan.
– Swedish Space Corporation (SSC)/Sweden.
– Swiss Space Office (SSO)/Switzerland.
– United States Geological Survey (USGS)/USA.
CCSDS 132.0-B-2 Page iv September 2015
CCSDS RECOMMENDED STANDARD FOR TM SPACE DATA LINK PROTOCOL
DOCUMENT CONTROL
Document Title Date Status
CCSDS TM Space Data Link Protocol, September Original issue, superseded
132.0-B-1 Recommended Standard, Issue 1 2003
CCSDS TM Space Data Link Protocol, September Current issue:
132.0-B-2 Recommended Standard, Issue 2 2015 – adds specifications to
support the Space
Data Link Security
Protocol;
– updates Frame Error
Control Field
Encoding Procedure to
be consistent with
other CCSDS Space
Data Link Protocol
specifications;
– changes all
occurrences of ‘Packet
Service’ and ‘Packet
Transfer Service’ to
‘Virtual Channel
Packet Service’;
– corrects/clarifies
Service Specification
‘.indication’ text;
– updates/clarifies text
relating to Idle Packet
generation;
– removes obsolete
informative annex
detailing changes from
Historical
Recommendations
CCSDS 102.0-B-5-S
(1984–2005) and
CCSDS 103.0-B-2-S
(1996–2005).
NOTE – Substantive changes from the previous issue are marked by change bars in the
inside margin. For terminology changes affecting the entire document, only the first
instances are marked.
CCSDS 132.0-B-2 Page v September 2015
CCSDS RECOMMENDED STANDARD FOR TM SPACE DATA LINK PROTOCOL
CONTENTS
Section Page
1 INTRODUCTION. 1-1

1.1 PURPOSE . 1-1
1.2 SCOPE . 1-1
1.3 APPLICABILITY . 1-1
1.4 RATIONALE . 1-2
1.5 DOCUMENT STRUCTURE . 1-2
1.6 CONVENTIONS AND DEFINITIONS . 1-2
1.7 REFERENCES . 1-6

2 OVERVIEW . 2-1

2.1 CONCEPT OF TM SPACE DATA LINK PROTOCOL . 2-1
2.2 OVERVIEW OF SERVICES . 2-4
2.3 OVERVIEW OF FUNCTIONS . 2-12
2.4 SERVICES ASSUMED FROM LOWER LAYERS . 2-14

3 SERVICE DEFINITION. 3-1

3.1 OVERVIEW . 3-1
3.2 SOURCE DATA. 3-1
3.3 VIRTUAL CHANNEL PACKET (VCP) SERVICE . 3-4
3.4 VIRTUAL CHANNEL ACCESS (VCA) SERVICE . 3-8
3.5 VIRTUAL CHANNEL FRAME SECONDARY HEADER (VC_FSH)
SERVICE . 3-12
3.6 VIRTUAL CHANNEL OPERATIONAL CONTROL FIELD (VC_OCF) SERVICE3-15
3.7 VIRTUAL CHANNEL FRAME (VCF) SERVICE . 3-18
3.8 MASTER CHANNEL FRAME SECONDARY HEADER (MC_FSH)
SERVICE . 3-21
3.9 MASTER CHANNEL OPERATIONAL CONTROL FIELD (MC_OCF)
SERVICE . 3-24
3.10 MASTER CHANNEL FRAME (MCF) SERVICE . 3-27

4 PROTOCOL SPECIFICATION WITHOUT SDLS OPTION . 4-1

4.1 PROTOCOL DATA UNIT . 4-1
4.2 PROTOCOL PROCEDURES AT THE SENDING END . 4-15
4.3 PROTOCOL PROCEDURES AT THE RECEIVING END . 4-22

CCSDS 132.0-B-2 Page vi September 2015
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