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1、 Standard ANSI/AIAA S-123-2007 Adaptations and Conversions of CCSDS Space Link Extension Forward Communications Link Transmission Unit Transfer Service AIAA standards are copyrighted by the American Institute of Aeronautics and Astronautics (AIAA), 1801 Alexander Bell Drive, Reston, VA 20191-4344 US
2、A. All rights reserved. AIAA grants you a license as follows: The right to download an electronic file of this AIAA standard for storage on one computer for purposes of viewing, and/or printing one copy of the AIAA standard for individual use. Neither the electronic file nor the hard copy print may
3、be reproduced in any way. In addition, the electronic file may not be distributed elsewhere over computer networks or otherwise. The hard copy print may only be distributed to other employees for their internal use within your organization. Copyright American Institute of Aeronautics and Astronautic
4、s Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AIAA S-123-2007 American National Standard Adaptations and Conversions of CCSDS Space Link
5、 Extension Forward Communications Link Transmission Unit Transfer Service Sponsored by American Institute of Aeronautics and Astronautics Approved 3 May 2007 American National Standards Institute Abstract This document defines adaptations and conversions of the Consultative Committee for Space Data
6、Systems (CCSDS)-standard SLE Forward Communications Link Transmission Unit (FCLTU) command transfer service. The CCSDS SLE transfer services do not support some legacy command and telemetry data flows that must be accommodated by US civil, military, and commercial space element tracking, telemetry,
7、and control networks to allow interoperability in support of US Government space operations. Adaptations of FCLTU by the user and conversions of FCLTU by the provider provide standardized discrete and streaming ternary command services and streaming binary command services which are not otherwise pr
8、ovided by CCSDS SLE transfer services. Discrete and streaming mode ternary command services support space elements which use ternary commanding on the space link. Streaming binary command services support space elements whose commands are not discrete or otherwise do not have discernible command bou
9、ndaries. Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AIAA S-123-2007 ii App
10、roval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been rea
11、ched by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National S
12、tandards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute d
13、oes not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for in
14、terpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to
15、affirm, revise, or withdraw this standard no later than five years from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Library of Congress Cataloging-in-Publication Data
16、 American national standard - Adaptations and conversions of CCSDS space link extension forward communications link transmission unit transfer service. p. cm. Includes bibliographical references. ISBN 978-1-56347-922-9 (hardcopy) - ISBN 978-1-56347-923-6 (electronic) 1. Artificial satellites in tele
17、communication-Standards-United States. 2. Data transmission systems-Standards-United States. I. American Institute of Aeronautics and Astronautics. II. American National Standards Institute. TK5104.D73 2007 621.3825-dc22 2007017956 Published by American Institute of Aeronautics and Astronautics 1801
18、 Alexander Bell Drive, Reston, VA 20191 Copyright 2007 American Institute of Aeronautics and Astronautics All rights reserved No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the U
19、nited States of America American National Standard Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license
20、from IHS -,-,- ANSI/AIAA S-123-2007 iii Contents Foreword.v Introductionvi 1 Scope 1 2 Tailoring 1 3 Applicable Documents . 1 4 Vocabulary 1 4.1 Acronyms and Abbreviated Terms 1 4.2 Terms and Definitions 2 4.3 Nomenclature. 3 4.4 Conventions 3 4.4.1 Bit numbering convention 3 4.4.2 Typographic conve
21、ntions. 4 5 Summary of Functions. 4 5.1 CLTU Adaptation Functions Performed by the Service User 4 5.1.1 CLTU-Transfer-Data Invocation Function. 6 5.1.2 Discrete Ternary Block Command Extraction Function . 6 5.1.3 Continuous Ternary Command Stream Segmentation Function. 6 5.1.4 Ternary Symbol to Dibi
22、t Translation Function. 7 5.1.5 Continuous Binary Command Stream Segmentation Function. 7 5.1.6 FCLTU Transfer Service Automatic Restart Function 7 5.2 CLTU Conversion Functions Performed by the Service Provider . 7 5.2.1 Ternary Dibit to Symbol Translation Function. 7 5.2.2 Ternary Physical Layer O
23、peration Procedures (PLOPs). 7 6 Supported Data Flows 8 6.1 Ternary-formatted commands transferred as discrete block commands 8 6.2 Ternary-formatted commands transferred as a continuous symbol stream . 10 6.3 Binary-formatted commands transferred as a continuous bitstream. 10 7 Deviation from Norma
24、l CCSDS SLE FCLTU Service. 13 7.1 CLTU-START. 13 7.2 CLTU-STOP . 13 7.3 CLTU-TRANSFER-DATA 13 7.4 CLTU-ASYNC-NOTIFY 13 7.5 CLTU-STATUS-REPORT 13 7.6 CLTU-GET-PARAMETER . 14 8 FCLTU Adaptation Functions Performed by the Service User 14 Copyright American Institute of Aeronautics and Astronautics Prov
25、ided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AIAA S-123-2007 iv 8.1 CLTU-Transfer-Data Invocation Function. 14 8.2 Discrete Ternary Block Com
26、mand Extraction Function . 15 8.3 Continuous Ternary Command Stream Segmentation Function. 16 8.4 Ternary Symbol to Dibit Translation Function. 16 8.5 Continuous Binary Command Stream Segmentation Function. 16 8.6 FCLTU Transfer Service Automatic Restart Function 16 9 CLTU Conversion Functions Perfo
27、rmed by the Service Provider . 17 9.1 Ternary Dibit to Symbol Translation Function. 17 9.2 Ternary Physical Layer Operation Procedures (PLOPs). 17 Annex A Informative References 19 Figures Figure 1 Bit Numbering Convention 3 Figure 2 Context of the FCLTU Conversion and Adaptation Functions 5 Figure
28、3 FCLTU Conversion and Adaptation Functions Supporting the Transfer of Ternary-Formatted Commands as Discrete Block Commands 9 Figure 4 FCLTU Conversion and Adaptation Functions Supporting the Transfer of Ternary-Formatted Commands as a Continuous Symbol Stream. 11 Figure 5 FCLTU Conversion and Adap
29、tation Functions Supporting the Transfer of Binary Commands as a Continuous Bitsteam 12 Tables Table 1 Mapping between Ternary Symbols and Ternary Dibits 16 Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wi
30、ng, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AIAA S-123-2007 v Foreword This standard was prepared by the AIAA Satellite Control Network Data Transfer Committee on Standards (CoS). The CoS was formed in 2005 to consider
31、 standardization of data transfer services relevant to the interoperation of US civil, military, and commercial telemetry, tracking, and control (TT and the other as a dibit symbol value. a) When or before production status transitions to operational, idle symbols shall be output to the RF and modul
32、ation equipment until a command segment is received in a CLTU-TRANSFER-DATA invocation, where the idle symbol is specified by the PLOP that is in effect, as configured via a managed parameter: 1) When ternary PLOP 1 is in effect, the idle symbol shall be the null symbol. 2) When ternary PLOP 2 is in
33、 effect, the idle symbol shall be the S symbol. b) For each CLTU-TRANSFER-DATA invocation with non-null earliest-radiation-time parameter value, the first symbol in the contained command segment shall be output to the RF and modulation equipment within one (1) symbol period or an implementation-spec
34、ific amount of time (e.g., five (5) milliseconds) (whichever is greater) of the time specified in the earliest-radiation-time parameter of the CLTU-TRANSFER-DATA invocation. Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/11
35、11111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AIAA S-123-2007 18 c) For each CLTU-TRANSFER-DATA invocation with earliest-radiation-time parameter value of null, the first symbol in the contained command
36、segment shall be output to the RF and modulation equipment within one (1) symbol period of (a) the time of receipt of the command segment in the previous CLTU-TRANSFER-DATA invocation (b) the output time of the last symbol of the previous segment, or (c) the whichever is later. d) If no command segm
37、ent is available for transmission immediately following the transmission of a symbol from a command segment, idle symbols for the ternary PLOP in effect shall be output to the RF and modulation equipment. e) The symbols shall be output to the RF and modulation equipment at a symbol rate configured v
38、ia a command symbol rate managed parameter. Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IH
39、S -,-,- ANSI/AIAA S-123-2007 19 Annex A Informative References CCSDS 910.3-G-2 Cross Support Concept Part 1: Space Link Extension Services. Report Concerning Space Data Systems Standards. Green Book. Issue 2. April 2002 CCSDS 910.4-B-1 Cross Support Reference ModelPart 1: Space Link Extension Servic
40、es. Blue Book. Issue 2. Washington, D.C.: CCSDS, October 2005 CCSDS 913.1-R-1 Space Link Extension Internet Protocol for Transfer Services. Draft recommended standard, Red Book. Washington, D.C.: CCSDS, October 2005. Copyright American Institute of Aeronautics and Astronautics Provided by IHS under
41、license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,- American Institute of Aeronautics and Astronautics 1801 Alexander Bell Drive, Suite 500 Reston, VA 20191-4344 www.aiaa.org ISBN 978-1-56347-923-6 Copyright American Institute of Aeronautics and Astronautics Provided by IHS under license with AIAA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/16/2007 21:57:32 MDTNo reproduction or networking permitted without license from IHS -,-,-