ISO 20105:2015

Space data and information transfer systems — Operation of CFDP over encapsulation service

The CCSDS File Delivery Protocol (CFDP?reference [1]) has been designed to support the transfer of files in a variety of mission scenarios. CFDP offers different qualities of service ranging from best effort to fully reliable and has been specifically optimized for long delay, noisy, and disjoint links. CFDP requires a simple minimum service from the underlying protocols, operating over any link providing a packet communication service. ISO 20105:2015 is to specify how to operate CFDP over the CCSDS Encapsulation Service (reference [2]) as provided for Earth-to-spacecraft, spacecraft-to-Earth, and spacecraft-to-spacecraft communications. It sets out the communications architecture for CFDP operating over the Encapsulation Service. It describes the service expected by CFDP of the underlying layers and reconciles this with the service provided by the Encapsulation Service.

Systèmes de transfert des informations et données spatiales — Exploitation du CFDP lors des services d'encapsulation

General Information

• Status: Published
• Publication Date: 10-Aug-2015
• ICS: 49.140 - Space systems and operations
• Technical Committee: ISO/TC 20/SC 13 - Space data and information transfer systems
• Drafting Committee: ISO/TC 20/SC 13 - Space data and information transfer systems
• Current Stage: 9093 - International Standard confirmed
• Start Date: 14-Nov-2023
• Completion Date: 13-Dec-2025

Relations

• Consolidated By: ISO 15609-2:2019 - Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 2: Gas welding
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20105
First edition
2015-08-15
Space data and information transfer
systems — Operation of CFDP over
encapsulation service
Systèmes de transfert des informations et données spatiales —
Exploitation du CFDP lors des services d’encapsulation
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
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ii © ISO 2015 – 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 20105 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as
CCSDS 722.1-M-1, March 2014) 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.

Recommendation for Space Data System Practices
OPERATION OF CFDP
OVER
ENCAPSULATION
SERVICE
RECOMMENDED PRACTICE
CCSDS 722.1-M-1
MAGENTA BOOK
March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
AUTHORITY
Issue: Recommended Practice, Issue 1
Date: March 2014
Location: Washington, DC, USA
This document has been approved for publication by the Management Council of the
Consultative Committee for Space Data Systems (CCSDS) and represents the consensus
technical agreement of the participating CCSDS Member Agencies. The procedure for
review and authorization of CCSDS documents is detailed in Organization and Processes for
the Consultative Committee for Space Data Systems (CCSDS A02.1-Y-3), and the record of
Agency participation in the authorization of this document can be obtained from the CCSDS
Secretariat at the address below.

This document is published and maintained by:

CCSDS Secretariat
Space Communications and Navigation Office, 7L70
Space Operations Mission Directorate
NASA Headquarters
Washington, DC 20546-0001, USA
CCSDS 722.1-M-1 Page i March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
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 Recommendations and are not in
themselves considered binding on any Agency.
CCSDS Recommendations take two forms: Recommended Standards that are prescriptive
and are the formal vehicles by which CCSDS Agencies create the standards that specify how
elements of their space mission support infrastructure shall operate and interoperate with
others; and Recommended Practices that are more descriptive in nature and are intended to
provide general guidance about how to approach a particular problem associated with space
mission support. This Recommended Practice is issued by, and represents the consensus of,
the CCSDS members. Endorsement of this Recommended Practice is entirely voluntary
and does not imply a commitment by any Agency or organization to implement its
recommendations in a prescriptive sense.
No later than five years from its date of issuance, this Recommended Practice 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 Practice is issued, existing
CCSDS-related member Practices and implementations are not negated or deemed to be non-
CCSDS compatible. It is the responsibility of each member to determine when such Practices
or implementations are to be modified. Each member is, however, strongly encouraged to
direct planning for its new Practices and implementations towards the later version of the
Recommended Practice.
CCSDS 722.1-M-1 Page ii March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
FOREWORD
This document is a technical Recommended Practice 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 Recommended Practice described herein is
intended for missions that are cross-supported between Agencies of the CCSDS.
This Recommended Practice specifies methods for operating the CCSDS File Delivery
Protocol (CFDP) over the CCSDS Encapsulation Service.
Through the process of normal evolution, it is expected that expansion, deletion, or
modification of this document may occur. This Recommended Practice is therefore subject
to CCSDS document management and change control procedures, which are defined in the
Organization and Processes for the Consultative Committee for Space Data Systems
(CCSDS A02.1-Y-3). 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 addressed to the
CCSDS Secretariat at the address indicated on page i.
CCSDS 722.1-M-1 Page iii March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
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.
– 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 722.1-M-1 Page iv March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
DOCUMENT CONTROL
Document Title Date Status
CCSDS Operation of CFDP over March 2014 Original issue
722.1-M-1 Encapsulation Service,
Recommended Practice, Issue 1
CCSDS 722.1-M-1 Page v March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
CONTENTS
Section Page
1 INTRODUCTION . 1-1

1.1 PURPOSE AND SCOPE OF THIS DOCUMENT . 1-1
1.2 APPLICABILITY . 1-1
1.3 RATIONALE . 1-1
1.4 DOCUMENT STRUCTURE . 1-1
1.5 CONVENTIONS AND DEFINITIONS. 1-2
1.6 NOMENCLATURE . 1-2
1.7 REFERENCES . 1-3

2 OVERVIEW . 2-1

2.1 GENERAL . 2-1
2.2 CONTEXT AND GUIDELINES . 2-1

3 CFDP-OVER-ENCAPSULATION . 3-1

3.1 GENERAL . 3-1
3.2 DISCUSSION—CFDP REQUIRED SERVICE . 3-1
3.3 DISCUSSION—ENCAPSULATION SERVICE . 3-1
3.4 EQUIVALENCIES . 3-2

ANNEX A INFORMATIVE REFERENCES . A-1
ANNEX B CFDP OPERATION OVER CCSDS SPACE LINKS (INFORMATIVE) . B-1
ANNEX C OPTIONS FOR DEPLOYMENT INTO GROUND STATION
NETWORKS (INFORMATIVE) . C-1
ANNEX D ABBREVIATIONS . D-1
Figure
2-1 CFDP Communication over Encapsulation . 2-1
B-1 CFDP Earth/Spacecraft Architecture Example .B-1
B-2 CFDP Communication between Earth and a Spacecraft .B-2
B-3 CFDP Proximity Physical Architecture Example .B-3
B-4 CFDP Communication with Landed Element .B-4

Table
B-1 Link Designations .B-2
B-2 Link Designations .B-4

CCSDS 722.1-M-1 Page vi March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
1 INTRODUCTION
1.1 PURPOSE AND SCOPE OF THIS DOCUMENT
The CCSDS File Delivery Protocol (CFDP—reference [1]) has been designed to support the
transfer of files in a variety of mission scenarios. CFDP offers different qualities of service
ranging from best effort to fully reliable and has been specifically optimized for long delay,
noisy, and disjoint links. CFDP requires a simple minimum service from the underlying
protocols, operating over any link providing a packet communication service.
The purpose of this document is to specify how to operate CFDP over the CCSDS
Encapsulation Service (reference [2]) as provided for Earth-to-spacecraft, spacecraft-to-
Earth, and spacecraft-to-spacecraft communications. It sets out the communications
architecture for CFDP operating over the Encapsulation Service. It describes the service
expected by CFDP of the underlying layers and reconciles this with the service provided by
the Encapsulation Service.
1.2 APPLICABILITY
This document applies to any mission or equipment claiming to provide a CCSDS-compliant
CFDP capability between two endpoints operating over a single CCSDS space link.
1.3 RATIONALE
This document is needed to clarify how CFDP should be used with the CCSDS
Encapsulation Service.
1.4 DOCUMENT STRUCTURE
The document has three major sections and four annexes:
– this section, containing administrative information, definitions, and references;
– section 2, describing the communications architecture of CFDP operating over an
underlying transport protocol;
– section 3, reconciling the service required of the underlying layer by CFDP with the
service provided by the underlying Encapsulation Service;
– annex A, listing informative references;
– annex B, discussing the operation of CFDP over long-haul and planetary CCSDS
space links;
– annex C, discussing options for deployment into ground station networks;
– annex D, expanding abbreviations used in the document.
CCSDS 722.1-M-1 Page 1-1 March 2014
RECOMMENDED PRACTICE FOR OPERATION OF CFDP OVER ENCAPSULATION SERVICE
1.5 CONVENTIONS AND DEFINITIONS
1.5.1 DEFINITIONS
1.5.1.1 General
For the purpose of this document the following definitions apply.
1.5.1.2 Definitions from the Open Systems Interconnection (OSI) Basic Reference
Model
This document is defined using the style established by the Open Systems Interconnection
(OSI) Basic Reference Model (reference [A1]). This model provides a common framework
for the development of standards in the field of systems interconnection.
The following terms, used in this Recommended Practice, are adapted from definitions given
in reference [A1]:
layer: Subdivision of the architecture, constituted by subsystems of the same rank.
protocol data unit: Unit of data specified in a protocol and consisting of protocol-control
information and possibly user data.
protocol ID: Identifier that specifies the layer-(N+1) protocol (type of service data unit)
encapsulated within a protocol data unit at layer N.
service: Capability of a layer (service provider) together with the layers beneath it, provided
to the service users.
service data unit, SDU: Set of data that is sent by a
...