ANSI ATIS 1000638-1999 B-ISDN ATM Adaptation Layer C Service Specific Coordination Function for Support of Signaling at the User-to-Network Interface (SSCF at the UNI).pdf
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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000638.1999(R2015) B-ISDN ATM Adaptation Layer Service Specific Coordination Function for Support of Signaling at the User-to-Network Interface (SSCF at the UNI) As a leading technology and solutions development organization, ATIS brings toget
2、her the top global ICT companies to advance the industrys most-pressing business priorities. Through ATIS committees and forums, nearly 200 companies address cloud services, device solutions, emergency services, M2M communications, cyber security, ehealth, network evolution, quality of service, bill
3、ing support, operations, and more. These priorities follow a fast-track development lifecycle from design and innovation through solutions that include standards, specifications, requirements, business use cases, software toolkits, and interoperability testing. ATIS is accredited by the American Nat
4、ional Standards Institute (ANSI). ATIS is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of oneM2M, a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications sectors, and a memb
5、er of the Inter-American Telecommunication Commission (CITEL). For more information, visit . AMERICAN NATIONAL STANDARD Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards d
6、eveloper. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that a
7、ll views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, p
8、urchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does 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
9、 issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard ma
10、y be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writin
11、g the American National Standards Institute. Notice of Disclaimer theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American Na
12、tional Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards In
13、stitute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that
14、action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Insti
15、tute, Inc.11 West 42nd Street, New York, NY 10036Copyright 2000 by Alliance for Telecommunications Industry SolutionsAll rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of the publisher.Printed
16、in the United States of AmericaiContentsPageForeword ii1 Scope, purpose, and application 12 Normative references . 13 Abbreviations and acronyms 14 Requirements . 2iiForeword (This foreword is not part of American National Standard T1.638-1999.)The intent of this standard is to provide a function at
17、 the UNI, which is used to mapthe service of the Service Specific Connection Oriented Protocol (SSCOP) to theneeds of the UNI layer 3 protocol (e.g., ITU-T (formerly CCITT) RecommendationQ.2931). This function is called Service Specific Coordination Function (SSCF) forsignalling at the UNI.The ATM A
18、daptation Layer (AAL) is defined to enhance the services provided by theATM layer to support the functions required by the next higher layer. Different AALssupport various protocols to suit the different needs of a range of AAL service users.One particular type of AAL service user is the signalling
19、AAL (SAAL) comprises AALfunctions necessary to support such a signalling entity. The structure of the SAAL isdefined in ITU-T Recommendation Q.2100. The SAAL is divided into two sublayers:a Common Part Convergence Sublayer (CPCS) and a Service Specific ConvergenceSublayer (SSCS). The common part pro
20、tocol is used as a basis for the service spe-cific part for signalling and is defined in ITU-T Recommendation I.363.5. The SSCS isfunctionally divided into two parts. The Service Specific Connection Oriented Proto-col (SSCOP), which provides an assured data transfer service and the Service Spe-cific
21、 Coordination Function (SSCF). The SSCOP is defined in draft ITU-TRecommendation Q.2110.The SSCF at the UNI performs a coordination function between the service requiredby the signalling layer 3 (Q.2931) user and the service provided by SSCOP. This rec-ommendation describes for the SSCF at the UNI t
22、he mapping of primitives from layer3 to signals of the SSCOP and vice versa.The current revision of this standard was made to indicate that the American NationalStandard for a B-ISDN ATM adaptation layer service specific coordination functionfor support of signaling at the UNI is the ITU-T Recommend
23、ation Q.2130, B-ISDNSignalling ATM Adaptation Layer - Service Specific Coordination Function for Sup-port of Signalling at the User-to-Network Interface (SSCF at the UNI).Suggestions for improvement of this standard are welcome. They should be sent tothe Alliance for Telecommunications Industry Solu
24、tions, T1 Secretariat, 1200 GStreet, NW, Suite 500, Washington DC 20005.This standard was processed and approved for submittal to ANSI by the AccreditedStandards Committee on Telecommunications, T1. Committee approval of this stan-dard does not necessarily imply that all committee members voted for
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