ANSI ATIS 0100519-1999 Specifications for Transport of Generic Packets (including MPEG-2) Transport Packets over the DS Hierarchy.pdf

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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-0100519.1999(R2013) Specifications for Transport of Generic Packets (including MPEG-2) Transport Packets over the DS Hierarchy As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to

2、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, billing support, operations, and more. T

3、hese 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 National Standards Institute (ANSI). AT

4、IS 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 member of the Inter-American Telecommuni

5、cation 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 developer. Consensus is established wh

6、en, 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 all views and objections be considered

7、, 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, purchasing, or using products, process

8、es, 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 issue an interpretation of an Americ

9、an 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 may be revised or withdrawn at any time

10、. 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 writing the American National Standards Ins

11、titute. 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 National Standards Institute does not d

12、evelop 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 Institute. Requests for interpretations

13、 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 action be taken periodically to reaff

14、irm, 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 Institute, Inc.11 West 42nd Street, New Yo

15、rk, NY 10036Copyright 1999 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 AmericaiConte

16、ntsPageForeword ii1 Scope . 12 Normative References 13 Definitions. 14 Acronyms 15 General Description 26 Generic Packet. 27 Generic Packet Adaptation to DS Frame . 38 DS1. 59 DS2. 510 DS3. 5Figures1 Standard Coverage 22 Generic Packet Structure . 23 Type 1 Adaptation Packet 34 Type 2 Adaptation Pac

17、ket 3iiForeword (This foreword is not part of American National Standard T1.519-1999.)This American National Standard was developed by Technical Subcommittee T1A1of Accredited Standards Committee T1, Telecommunications. Committee T1 stan-dards serve the public through improved understanding between

18、carriers, end-users,and manufacturers.This standard will be useful to anyone engaged in the design, provisioning or opera-tion of telecommunications equipment or services that provide DS1, DS2 or DS3 dig-ital transmission technology for the purpose of transport of generic packets defined inthis stan

19、dard. MPEG-2 transport packets are included as a special form and imple-mentation of the generic packets.Conformance to the standard should provide interface compatibility in most installa-tions, but the standard does not guarantee compatibility or acceptable performanceunder all operating condition

20、s.Suggestions for improvement of this standard are welcome. They should be sent tothe Alliance for Telecommunications Industry Solutions, 1200 G Street, NW, Suite500, Washington, DC 20005.This Standard was processed and approved for submittal to ANSI by AccreditedStandards Committee on Telecommunica

21、tions, T1. Committee approval of the stan-dard does not necessarily imply that all members voted for approval. At the time itapproved this standard, the T1 Committee had the following members:Gerald H. Peterson, ChairmanE. Raymond Hapeman, Vice-ChairmanSusan Carioti, T1 DisciplinesSteve Barclay, T1

22、SecretaryBarry Lerich, Senior Technical EditorLeigh Chang, Technical EditorOrganization Represented Name of RepresentativeEXCHANGE CARRIERSAmeritech . Richard WoodLarry A. Young (Alt.)AT when it is a 0, the AP does not contain a valid Generic Packet (i.e., itcontains a null AP).FEC Forward Error Cor

23、rection field:In a Type 2 Adaptation Packet, this field is for an optional 16-byte FEC code used for AdaptationPacket protection over a noisy DS link.7.2 Forward error correction codingWhen the “FEC_EN” field is set to 1 in an AP descriptor byte, the “FEC” field of the AP shallcontain 16 bytes of RS

24、 parity code. The RS parity code shall be generated by applying RS(205,189, t = 8) to the AP descriptor byte and the 188 bytes of GP. The byte order, when the RSalgorithm is applied to a GP, shall be the same as that of the AP transmission, i.e., AP descriptorbyte first followed by AP payload bytes.

25、The Field Generator Polynomial is:() 1278+= xxxxxPThe Code Generator Polynomial is:() ()=135120iiaxxGWith this RS code, up to eight random erroneous bytes in a T2AP can be corrected.7.3 AP to DS Payload Rate AdaptationWhen no GP packets are to be transmitted over the DS payload, due to either idle G

26、P inputs orlow GP input data rates, null APs are inserted into the DS payload instead (by a transmitter). Anull AP is indicated by a 0 at the “GP_PRSNT” bit in the descriptor byte of an AP. The first bytethat follows a null AP descriptor byte shall be set to a hexadecimal value of 0 x 47.ANSI T1.519

27、-19995The resultant AP stream data rate shall be equal to that of the payload of the encapsulating DSchannel. The total data rate of the GP streams carried by the AP stream shall not exceed themaximum payload rate of the DS interface (less the descriptor and any FEC bytes of the APs),such that DS ov

28、erhead bits are not relied upon to carry any AP or GP information.7.4 AP Transmission OrderOn a DS interface, the first byte of an Adaptation Packet (T1AP or T2AP) is transmitted first. Themost significant bit of an Adaptation Packet byte is transmitted first.The first bit of an AP is not required t

29、o be in a fixed position relative to the DS framing structure inwhich it is carried. No byte or nibble alignment with DS framing is required.8 DS18.1 InterfaceThe DS1 interface shall conform to the DS1 interface specification as defined in ANSI T1.102 toensure compatibility with existing DS1 transpo

30、rt equipment.The DS1 interface shall conform to the unchannelized DS1 application as specified in ANSIT1.107. Applications for both Superframe (SF) and Extended SF (ESF) are supported as definedin ANSI T1.107.DS1 frame overhead bits shall be used as specified in ANSI T1.107 and ANSI T1.403.Performan

31、ce monitoring and alarm/status monitoring for DS1 shall be supported in accordancewith ANSI T1.231.9 DS29.1 InterfaceThe DS2 interface shall conform to the DS2 interface specification as defined in ANSI T1.102 toensure compatibility with existing DS2 transport equipment.DS2 frame overhead bits shall

32、 be used as specified in ANSI T1.107.10 DS310.1 InterfaceThe DS3 interface shall conform to the DS3 interface specification as defined in ANSI T1.102 toensure compatibility with existing DS3 transport equipment.The DS3 interface shall conform to the unchannelized DS3 application as specified in ANSIT1.107.DS3 frame overhead bits shall be used as specified in ANSI T1.107 and ANSI T1.404.Performance monitoring and alarm/status monitoring for DS3 shall be supported in accordancewith ANSI T1.231.

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