1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-0100504.1998(R2011) Packet-Switched Data Communication Service Performance Parameters, Measurements Methods, and Objectives ATIS is the leading technical planning and standards development organization committed to the rapid development of glob
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11、e 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 in no circumstances give interpretation on any Ame
12、rican 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 the secretariat or sponsor whose name appears on the ti
13、tlepage 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 this standard. Purchasers of American National Standard
14、s 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 1998 by Alliance for Telecommunications Industry Solution
15、sAll 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 iv1Introduction. 1 2Normative references . 3 3Performance model
16、 3 4Speed of service parameters 11 5Accuracy and dependability parameters 17 6Availability. 25 7Requirements and example procedures for performance measurement 298Performance specifications 60Tables1X.25 packet layer reference events and resulting interface states. 82X.75 packet layer reference even
17、ts and resulting interface states. 93Packet layer reference events (PEs) used in measuring call set-up delay. 134Packet layer reference events (PEs) used in measuring data packet transfer delay and throughput. 145Packet layer reference events (PEs) used in measuring clear indication delay. 176Packet
18、 layer reference events (PEs) used in measuring residual error ratio. 217Pairs of PEs resulting from reset events 228Pairs of PEs resulting from premature disconnect events 249Packet layer reference events (PEs) used in measuring call clear failure probability . 2510Outage criteria for the availabil
19、ity decision parameters 2711Summary of measurement architectures 3512Calculation of statistics for performance parameters . 5713Factors that may influence the performance parameter values . 5914Call set-up delay: Worst-case design objectives. 6515Values of X for table 14 6516Data packet transfer del
20、ay: Worst-case design objectives 6617Values of Y for table 16 6618Throughput capacity: Worst-case design objectives . 6719Clear indication delay: Worst-case design objectives . 6820Values of Zfor table 19 68iiPage21Call set-up error probability: Worst-case design objectives 6922Call set-up failure p
21、robability: Worst-case design objectives 6923Residual error ratio: Worst-case design objectives . 6924Reset stimulus probability: Worst-case design objectives. 7025Reset probability: Worst-case design objectives. 7026Premature disconnect stimulus probability: Worst-case design objectives . 7027Prema
22、ture disconnect probability: Worst-case design objectives . 7128Call clear failure probability: Worst-case design objectives 7129Service availability: Worst-case design objectives 7230Mean time between service outages (MTBSO): Worst-case design objectives . 72Figures1Packet-switched service performa
23、nce description . 22Sections of a national virtual connection 43Example packet layer reference events . 44Diagram of DTE/DCE flow control states . 105Diagram of STE-X/STE-Y flow control states. 116Call set-up delay events . 127Packet layer reference events occurring during successful call set-up 188
24、Components of residual error ratio. 199Reset stimulus and reset probabilities 2310Determination of availability states. 2711Basic availability model and parameters 2812Measurement architectures 3213Loopback architectures 3414Example access trial data extraction procedure. 3815Example access trial da
25、ta reduction procedure . 3916Classifying an access trial outcome . 4017CSD calculation 4018Example data transfer trial extraction procedure 4119Example data transfer trial data reduction procedure 4320RP, RSP, PDP, and PDSP calculations (approximate method). 4421Residual error ratio calculation (app
26、roximate method). 4522DPTD and TC calculation. 45iiiPage23Example disengagement trial data extraction procedure 4624Example disengagement trial data reduction procedure 4725Classifying a disengegement trial outcome 4826CID calculation 4827Minimal availability trial data extraction procedure . 4928Mi
27、nimal availability trial data reduction procedure 5129Data reduction procedure for estimating mean time between serviceoutages . 5330National packet-switched service performance allocation model . 6231Definition of reference events at the NI and INI boundaries . 63AnnexesAStastistical formulas 73BMe
28、thods for estimating performance of concatenated access and transit virtual connection portions . 74CSampling estimation of availability parameters. 77DBibliography 85EAcronyms 86ivForeword(This foreword is not part of American National Standard T1.504-1998.)This standard defines a set of performanc
29、e parameters for packet-switched datacommunication services. The parameters may be used to specify or measure theperformance of any virtual connection (or section of a virtual connection) delimited bythe interfaces described in two ITU-T Recommendations: X.25 (Interface betweendata terminal equipmen
30、t (DTE) and data circuit-terminating equipment (DCE) for ter-minals operating in the packet mode and connected to public data Networks by dedi-cated circuit),and X.75 (Packet-switched signalling systems between publicnetworks providing data transmission services).The parameters address both virtualc
31、all and permanent virtual circuit services. They describe performance relative tothree primary data communication functions: access, user information transfer, anddisengagement. Each function is considered with respect to three general perfor-mance criteria: speed, accuracy, and dependability. The d
32、efined parameters are oftwo types: primary parameters and availability parameters. The primary parametersprovide a relatively detailed description of performance that encompasses each ofthe three functions and criteria. The availability parameters are derived from obser-vations of the primary parame
33、ter values and provide a more macroscopic, longer-term view of performance. The parameters are defined on the basis of standard in-terface events to facilitate their measurement with stand-alone test equipment.This standard evolved from, and is complementary to, a number of other national andinterna
34、tional standards. In American National Standard for Information systems -Data communications systems and services - User-oriented performance parame-ters, ANSI X3.102-1992, parameters are defined that may be used to describe theperformance of data communication services from the point of view of the
35、 end user ina protocol-independent manner. Many of the parameters defined in this T1 standardare protocol-specific counterparts to the parameters in ANSI X3.102. In AmericanNational Standard for Information systems - Data communication systems and ser-vices - Measurement methods for user-oriented pe
36、rformance evaluation,ANSIX3.141-1987 (R1992), measurement methods for the parameters described in ANSIX3.102 are defined. In General quality of service parameters for communications viaPublic Data Networks, ITU-T Recommendation X.140, protocol-independent quality-of-service parameters are defined th
37、at are similar to those defined in ANSI X3.102.Finally, packet switched service performance parameters, apportionment boundariesand worst-case performance values for international packet switched services aredefined in ITU-T Recommendations X.134, X.135, X.136, and X.137.This standard contains five
38、annexes. Annexes A through E are informative and arenot considered part of the standard.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 20005This standard was processed
39、 and approved for submittal to ANSI by AccreditedStandards Committee on Telecommunications, T1. Committee approval of this stan-dard does not necessarily imply that all committee members voted for its approval.At the time it approved this standard, Committee T1 had the following members:G. H. Peters
40、on, ChairmanE. R. Hapeman, Vice-ChairmanA. Lai, SecretaryB. Lerich, Senior EditorG. Couch, Technical EditorvOrganization Represented Name of RepresentativeEXCHANGE CARRIERSAmeritech L. Richard WoodLarry A. Young (Alt.)AT&T Wireless Services, Inc. . David HolmesBell Atlantic . John W. SeazholtzRoger
41、Nucho (Alt.)Bellcore . James C. StaatsCliff Halevi (Alt.)Bellsouth Telecommunications Inc. Malcolm Threlkeld, Jr.John Spencer (Alt.)GTE Telephone Operations Bernard J. HarrisRichard L. Cochran (Alt.)NYNEX James F. BaskinMichael Brusca (Alt.)Pacific Bell Ken KoupalSBC Communications, Inc. . C.C. Bail
42、eyRobert J. Hall (Alt.)Sprint - Local Telecommunications Division . Leroy D. KelloggU S West. James L. EitelDarryl Debault (Alt.)US Telephone Association-USTA. Dennis ByrnePaul Hart (Alt.)INTEREXCHANGE CARRIERSAT&T. Charles A. DvorakJeffrey George (Alt.)AT&T Canada Long Distance Svcs David H. WhyteG
43、eorge Tadros (Alt.)Comsat Corporation Mark T. NeibertPrakash Chitre (Alt.)General Communication, Inc. . Derek L. WeltonC.R. Baugh (Alt.)MCI Telecommunications Corporation Laszlo I. SzerenyiJ. Martin Carroll (Alt.)Sprint - Long Distance Div. . Thomas G. CrodaJames Lord (Alt.)Stentor Resource Centre I
44、nc. . B. SambasivanAl M. Yam (Alt.)Worldcom Robert BentleyKen Hosang (Alt.)MANUFACTURERSADC Telecommunications Inc. Don BerrymanCliff Davidow (Alt.)Alcatel Network Systems (ANS) . Jack BoychukDale Krisher (Alt.)AMP Inc. George LawrenceBen Bennett (Alt.)Apple Computer Inc. Wanda CoxDavid Michael (Alt
45、.)Ascom Enterprise Networks L.H. EberlZ. Putnins (Alt.)DSC Communications Corporation. Pete WaalAllen Adams (Alt.)ECI Telecom Inc. . Ron MurphyDanny Etz-Hadar (Alt.)Ericsson Inc. Linda TroyAl Way (Alt.)Fujitsu America Inc. Kenneth T. CoitHirohiko Yamamoto (Alt.)General Datacomm Inc. . Frederick Luca
46、sHarris Corporation. Yogi MistryHekimian Laboratories William H. DuncanHewlett-Packard Karen HigginbottomRichard Van Gelder (Alt.)Hughes Network Systems, Inc Dr Leonard GoldingEnrique Laborde (Alt.)viOrganization Represented Name of RepresentativeIBM Corporation William C. BergmanRao J. Cherukuri (A
47、lt.)Lucent Technologies .John H. BobsinDave R. Andersen (Alt.)Motorola Inc.Ken SkurnakDan Grossman (Alt.)NEC America, Inc. Donovan NakTakayuki Yoshida (Alt.)Nokia Telecommunications Inc. Chris WallaceTeuvo Jarvela (Alt.)Northern Telecom Inc. Mel N. WoinskyJohn Pugh (Alt.)Oki America Inc. .Henri Suyd
48、erhoudHisao Fujikawa (Alt.)Omnipoint Corporation Gary K. JonesParadyne Corporation .Marlis HumphreyRichard K. Smith (Alt.)Picturetel CorporationMarshall SchachtmanDavid Lindbergh (Alt.)Pirelli Tsg.John McdonoughT.C. Nie (Alt.)Qualcomm, Inc. Mark EpsteinEd Tiedemann (Alt.)Reltec Corporation Mark Scot
49、tLeroy Baker (Alt.)Rockwell International .Quentin C. CassenCarl J. Stehman (Alt.)Siemens Stromberg-Carlson .David E. FranciscoDennis Edinger (Alt.)Telecom Solutions.M.J. NarasimhaDon Chislow (Alt.)Telecommunications TechniquesBernard E. WorneJohn Paul Williams (Alt.)Tellabs Operations, Inc. R. Michael Schafer, Ph.D.Michael J. Birck (Alt.)Transwitch Corporation .Daniel C. UppPraveen Goli (Alt.)U.S. Robotics Richard L. StuartDale Walsh (Alt.)GENERAL INTERESTABC Inc. Warner W. JohnstonAerial Communications .George P. LynchBellSouth Personal Communications Inc. .Don ZelmerGretel Hoffman (Al
