ISO 17355:2007

Space data and information transfer systems — CCSDS file delivery protocol

ISO 17355:2007 defines a CCSDS file delivery protocol (CFDP) and associated service for application in the space environment. It is intended for use over the current and envisaged packet delivery services used in the space environment, including CCSDS conventional packet telecommand; CCSDS conventional packet telemetry; CCSDS advanced orbiting systems (AOS) path service. It may also operate over a wide variety of ground network services, including those specified by the CCSDS for cross-support purposes. The protocol operates in the space-to-ground, ground-to-space, and space-to-space directions of transfer. It may be initiated by the file sending or receiving entity. In the interests of interoperability, protocol elements are included for generalized forms of standard file manipulation operations based on assumptions of a common model for a ‘filestore', or medium used to store files. It is recognized, however, that the precise nature and capabilities of filestore management systems are operating-system dependent and, for that reason, the protocol assumes a virtual filestore and associated services that an implementation must map to the capabilities of the actual filestore used. The scope and field of application are furthermore detailed in subclauses 1.2 and 1.3 of the enclosed CCSDS publication.

Systèmes de transfert des informations et données spatiales — Protocole CCSDS de livraison de fichiers

General Information

• Status: Published
• Publication Date: 06-May-2007
• 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: 9060 - Close of review
• Completion Date: 02-Sep-2029

Relations

• Revises: ISO 17355:2004 - Space data and information transfer systems — CCSDS file delivery protocol
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17355
Third edition
2007-05-15
Space data and information transfer
systems — CCSDS file delivery protocol
Systèmes de transfert des informations et données spatiales —
Protocole CCSDS de livraison de fichiers

Reference number
©
ISO 2007
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©  ISO 2007
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ii © ISO 2007 – 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 17355 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as
CCSDS 727.0-B-3, June 2005) 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 third edition cancels and replaces the second edition (ISO 17355:2004), which has been technically
revised.
INTERNATIONAL STANDARD ISO 17355:2007(E)

Space data and information transfer systems — CCSDS file
delivery protocol
1 Scope
This International Standard defines a CCSDS file delivery protocol (CFDP) and associated service for
application in the space environment. It is intended for use over the current and envisaged packet delivery
services used in the space environment, including
⎯ CCSDS conventional packet telecommand;
⎯ CCSDS conventional packet telemetry;
⎯ CCSDS advanced orbiting systems (AOS) path service.
It may also operate over a wide variety of ground network services, including those specified by the CCSDS
for cross-support purposes. The protocol operates in the space-to-ground, ground-to-space, and space-to-
space directions of transfer. It may be initiated by the file sending or receiving entity. In the interests of
interoperability, protocol elements are included for generalized forms of standard file manipulation operations
based on assumptions of a common model for a ‘filestore’, or medium used to store files. It is recognized,
however, that the precise nature and capabilities of filestore management systems are operating-system
dependent and, for that reason, the protocol assumes a virtual filestore and associated services that an
implementation must map to the capabilities of the actual filestore used.
The scope and field of application are furthermore detailed in subclauses 1.2 and 1.3 of the enclosed CCSDS
publication.
2 Requirements
Requirements are the technical recommendations made in the following publication (reproduced on the
following pages), which is adopted as an International Standard:
CCSDS 727.0-B-3, June 2005, CCSDS file delivery protocol (CFDP).
For the purposes of international standardization, the modifications outlined below shall apply to the specific
clauses and paragraphs of publication CCSDS 727.0-B-3.
Pages i to v
This part is information which is relevant to the CCSDS publication only.
Page 1-5
Add the following information to the reference indicated:
[1] Document CCSDS 732.0-B-1, September 2003, is equivalent to ISO 22666:2005.
[2] Document CCSDS 132.0-B-1, September 2003, is equivalent to ISO 22645:2005.
[3] Document CCSDS 133.0-B-1, September 2003, is equivalent to ISO 22646:2005.
[4] Document CCSDS 232.0-B-1, September 2003, is equivalent to ISO 22664:2005.
3 Revision of publication CCSDS 727.0-B-3
It has been agreed with the Consultative Committee for Space Data Systems that Subcommittee
ISO/TC 20/SC 13 will be consulted in the event of any revision or amendment of publication
CCSDS 727.0-B-3. To this end, NASA will act as a liaison body between CCSDS and ISO.

2 © ISO 2007 – All rights reserved

Recommendation for Space Data System Standards
CCSDS FILE DELIVERY
PROTOCOL (CFDP)
RECOMMENDED STANDARD
CCSDS 727.0-B-3
BLUE BOOK
June 2005
(Blank page)
4 © ISO 2007 – All rights reserved

CCSDS RECOMMENDED STANDARD FOR CCSDS FILE DELIVERY PROTOCOL (CFDP)
AUTHORITY
Issue: Recommended Standard, Issue 3
Date: June 2005
Location: Not Applicable
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 Recommendations is detailed in the reference [A1], and
the record of Agency participation in the authorization of this document can be obtained
from the CCSDS Secretariat at the address below.

This Recommendation is published and maintained by:

CCSDS Secretariat
Office of Space Communication (Code M-3)
National Aeronautics and Space Administration
Washington, DC 20546, USA
CCSDS 727.0-B-3 Page i June 2005
CCSDS RECOMMENDED STANDARD FOR CCSDS FILE DELIVERY PROTOCOL (CFDP)
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 727.0-B-3 Page ii June 2005
6 © ISO 2007 – All rights reserved

CCSDS RECOMMENDED STANDARD FOR CCSDS FILE DELIVERY PROTOCOL (CFDP)
FOREWORD
Until relatively recently the typical storage medium for spacecraft has been the tape recorder,
a complex device offering limited data storage and data access. The use of this type of
storage has typically been limited to the recording and subsequent dump to the ground of
telemetry data. Manipulation from the ground has required significant human intervention
and used ad hoc, privately developed protocols.
The introduction of solid state mass memory providing gigabytes of storage with random
access opens up a whole new ethos of spacecraft operation where much of the routine traffic
to and from the spacecraft will be in the form of files. Furthermore, because of the random
access nature of the onboard storage medium, it becomes possible to repeat transmission of
data lost on the link and thus guarantee delivery of critical information.
To exploit the potential advantages of onboard mass memory, protocol support is required to
provide a standard means to move data to and from the onboard storage medium in the form
of files.
While the onboard storage medium has rapidly evolved, the essential constraints of space
missions remain:
– limited systems resources in terms of computational power and memory capacities;
– environmental restrictions including noisy, bandwidth limited, asymmetrical, and
interrupted communications links, some with very long propagation delay;
– varying user needs including a requirement for early access to transferred data
regardless of its quality.
In view of these constraints, it is clear that there is a need for a file delivery service capable
of transferring files to and from mass memory located in the space segment. Such a
capability must not only operate under the constraints associated with space data
communication, but it must also be applicable to the diverse range of mission configurations
ranging from single low earth orbiting spacecraft to complex networks of relays, orbiters,
and landers.
Through the process of normal evolution, it is expected that expansion, deletion, or
modification of this document may occur. This Recommendation is therefore subject to
CCSDS document management and change control procedures which are defined in reference
[A1]. 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 727.0-B-3 Page iii June 2005
CCSDS RECOMMENDED STANDARD FOR CCSDS FILE DELIVERY PROTOCOL (CFDP)
At time of publication, the active Member and Observer Agencies of the CCSDS were:

Member Agencies
– Agenzia Spaziale Italiana (ASI)/Italy.
– British National Space Centre (BNSC)/United Kingdom.
– Canadian Space Agency (CSA)/Canada.
– Centre National d’Etudes Spatiales (CNES)/France.
– Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)/Germany.
– European Space Agency (ESA)/Europe.
– Federal Space Agency (Roskosmos)/Russian Federation.
– Instituto Nacional de Pesquisas Espaciais (INPE)/Brazil.
– Japan Aerospace Exploration Agency (JAXA)/Japan.
– National Aeronautics and Space Administration (NASA)/USA.

Observer Agencies
– Austrian Space Agency (ASA)/Austria.
– Belgian Federal Science Policy Office (BFSPO)/Belgium.
– Central Research Institute of Machine Building (TsNIIMash)/Russian Federation.
– Centro Tecnico Aeroespacial (CTA)/Brazil.
– Chinese Academy of Space Technology (CAST)/China.
– Commonwealth Scientific and Industrial Research Organization (CSIRO)/Australia.
– Danish Space Research Institute (DSRI)/Denmark.
– European Organization for the Exploitation of Meteorological Satellites
(EUMETSAT)/Europe.
– European Telecommunications Satellite Organization (EUTELSAT)/Europe.
– 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.
– MIKOMTEK: CSIR (CSIR)/Republic of South Africa.
– Ministry of Communications (MOC)/Israel.
– National Institute of Information and Communications Technology (NICT)/Japan.
– National Oceanic & Atmospheric Adminis
...