ANSI ATIS 1000637-1999 B-ISDN ATM Adaptation Layer C Service Specific Connection Oriented Protocol (SSCOP).pdf
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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000637.1999(R2015) B-ISDN ATM Adaptation Layer Service Specific Connection Oriented Protocol (SSCOP) As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industrys mos
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5、. 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 developer. Consensus is established when, in the judgment of t
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8、nforming 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 issue an interpretation of an American National Standard in
9、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 CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the
10、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 writing the American National Standards Institute. Notice of Discla
11、imer 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 National Standards Institute does not develop standards andwill
12、 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 Institute. Requests for interpretations should beaddressed to t
13、he 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 action be taken periodically to reaffirm, revise, orwithdraw
14、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 Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 20
15、00 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 in the United States of AmericaiContentsPageForeword ii1 Scop
16、e, purpose, and application 12 Normative references . 13 Abbreviations and acronyms 14 Requirements . 3iiForeword (This foreword is not part of American National Standard T1.637-1999.)The intent of this standard is to provide a new protocol specification that can be usedin the B-ISDN ATM Adaptation
17、Layer (AAL). This protocol, called the Service SpecificConnection Oriented Protocol (SSCOP), provides assured data delivery betweenAAL connection endpoints.The ATM Adaptation Layer (AAL) is defined as enhancing the services provided bythe ATM layer to support the functions required by the next highe
18、r layer. DifferentAALs support various protocols to suit the different needs of a range of AAL serviceusers. One particular type of AAL service user is the signaling entity wishing to com-municate with a peer entity. The signaling AAL (SAAL) comprises AAL functions nec-essary to support such a signa
19、ling entity. The structure of the SAAL is defined inT1.636-1999. The SSCOP has been defined to provide functions required in theSAAL.The SAAL is a combination of two sublayers: a common part and a service specificpart. The common part protocol is defined in ITU-T Recommendation I.363.5. Theservice s
20、pecific part is also known as the Service Specific Convergence Sublayer(SSCS). In the SAAL, the SSCS itself is functionally divided into the SSCOP and aService Specific Coordination Function (SSCF), which maps the services provided bythe SSCOP to the needs of the user of the SAAL. This structure all
21、ows a commonconnection oriented protocol with error recovery (the SSCOP) to provide a genericreliable data transfer service for different AAL interfaces defined by the SSCF. Twosuch SSCFs, one for signaling at the User Network Interface (UNI) and one for sig-naling at the Network to Network Interfac
22、e (NNI), have been defined in ITU-T Recom-mendations Q.2130 and Q.2140, respectively. It is also possible to define additionalSSCFs over the common SSCOP to provide different AAL services.The SSCOP is a peer-to-peer protocol that provides the following functions:- transfer of user data with sequence
23、 integrity,- error correction by selective retransmission,- flow control,- connection control,- error reporting to layer management,- connection maintenance in the prolonged absence of data transfer,- local data retrieval by the user,- error detection of protocol control information, and- status rep
24、orting.This standard describes for SSCOP the necessary elements for layer-to-layer com-munication, the elements for peer-to-peer communication, a detailed protocol specifi-cation, and examples of SSCOP operation. The current revision of this standard was made to indicate that the American NationalSt
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