ETSI ETS 300 217-1 ed.1 (1992-12)

Network Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 1: Overview

DE/NA-053201-1

Omrežni vidiki (NA) – Nepovezavna širokopasovna podatkovna storitev (CBDS) – 1. del: Pregled

General Information

• Status: Published
• Publication Date: 09-Dec-1992
• Technical Committee: NA 5 - Broadband Networks
• Current Stage: 12 - Completion
• Due Date: 04-Dec-1992
• Completion Date: 10-Dec-1992
• Ref Project: SIST ETS 300 217-1 E1:2003 - Network Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 1: Overview

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Omrežni vidiki (NA) – Nepovezavna širokopasovna podatkovna storitev (CBDS) – 1. del: PregledNetwork Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 1: Overview33.040.40Podatkovna komunikacijska omrežjaData communication networksICS:Ta slovenski standard je istoveten z:ETS 300 217-1 Edition 1SIST ETS 300 217-1 E1:2003en01-december-2003SIST ETS 300 217-1 E1:2003SLOVENSKI
STANDARD



SIST ETS 300 217-1 E1:2003



EUROPEANETS 300 217-1TELECOMMUNICATIONDecember 1992STANDARDSource: ETSI TC-NAReference: DE/NA-053201-1ICS:33.040Key words:Network, CBDSNetwork Aspects (NA);Connectionless Broadband Data Service (CBDS)Part 1: OverviewETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1992. All rights reserved.SIST ETS 300 217-1 E1:2003



Page 2ETS 300 217-1: December 1992Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 217-1 E1:2003



Page 3ETS 300 217-1: December 1992ContentsForeword.51Scope.72Normative references.73Definitions and abbreviations.83.1Definitions.83.2Abbreviations.124Reference configuration.135Subdivision of the service description.136Addressing principles.156.1Addressing principles for the UMI and UNI interfaces.156.1.1Individual/group addresses.156.1.2Address type.156.1.3Allocation of addresses.156.2Addressing principles for the USI.15Annex A (informative):Bibliography.16History.17SIST ETS 300 217-1 E1:2003



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Page 5ETS 300 217-1: December 1992ForewordThis part of European Telecommunication Standard (ETS) 300 217 has been prepared by the NetworkAspects (NA) Technical Committee of the European Telecommunications Standards Institute (ETSI).According to CCITT Recommendation I.130, the following three level structure is used to describe thecharacterisation of telecommunication services:-Stage 1: is an overall service description, from the user's standpoint;-Stage 2: identifies the functional capabilities and information flows needed to support the servicedescribed in stage 1;-Stage 3: defines the signalling system protocols and switching functions needed to implement theservice described in stage 1.This ETS details the stage 1 aspects for the Connectionless Broadband Data Service (CBDS).This part constitutes Part 1 of the 4 part ETS on the CBDS, and gives a general overview of the service.A list of informative references, used throughout this document, is given in Annex A.SIST ETS 300 217-1 E1:2003



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Page 7ETS 300 217-1: December 19921ScopeThis part of European Telecommunication Standard (ETS) defines the stage 1 of the ConnectionlessBroadband Data Service (CBDS) which can be provided by Metropolitan Area Networks (MANs) (seeETS 300 211 [6]) and an Asynchronous Transfer Mode (ATM) based network. Whilst this bearer servicecategory is aiming primarily at Local Area Network (LAN) interconnections (see ISO/IEC DIS 8802-1 [16]),other uses are also envisaged.This 4 part ETS defines a CBDS which is independent of the layers above. The bearer service categorycould be provided by any network but it is particularly suited for MANs and an ATM based network. EachProtocol Data Unit (PDU) is transferred transparently and separately without the establishment of an end-to-end connection, with no guarantee of delivery and no acknowledgement of delivery. However, theunderlying network provides a highly reliable service which is reflected by the defined Quality of Service(QOS) parameters.If certain applications require a better QOS, higher layer protocols, e.g. connection-oriented transportprotocols, will perform additional functions. Since the network provides a transparent transfer of data, atleast in principle, any higher layer protocol may be employed. The inherent delay of long distancecommunications could degrade end to end performance as seen by the user if end to end communicationprotocols are not adequate.This 4 part ETS contains a stage 1 description of the CBDS, according to CCITT Recommendation I.130,which contains a general description and a list of communication attributes. However, this document goesbeyond a stage 1 description where additional information seems to be required for an earlyimplementation of the CBDS.This part, Part 1, contains an overview of the CBDS. The description of the basic bearer service categoryis given in Part 2 of this ETS, ETS 300 217-2 [12]. Part 3, ETS 300 217-3 [13] defines the supplementaryservices. Part 4, ETS 300 217-4 [14] describes the address screening supplementary service.2Normative referencesThis ETS incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to, or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ISO/IEC 8802-3 (1990): "Information processing systems - Local area networks- Part 3: Carrier sense multiple access with collision detection (CSMA/CD) -access method and physical layer specifications".[2]ISO/IEC 8802-5 (1988): "Information processing systems - Local area networks- Part 5: Token ring access method and physical layer specifications."[3]IEEE 802.6 (1990): "Distributed Queue Dual Bus (DQDB) subnetwork of ametropolitan area network (MAN)".[4]CCITT Recommendation E.164 (1991): "Numbering plan for the ISDN era".[5]CCITT Recommendation I.413 (1991): "B-ISDN user-network interface".[6]ETS 300 211 (1992): "Network Aspects (NA); Metropolitan Area Network (MAN)Principles and architecture".[7]CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs".[8]CCITT Recommendation E.800 (1988): "Quality of service and dependabilityvocabulary".[9]CCITT Recommendation I.324 (1988): "ISDN network architecture".SIST ETS 300 217-1 E1:2003



Page 8ETS 300 217-1: December 1992[10]CCITT Recommendation I.327: "B-ISDN functional architecture".[11]CCITT Recommendation I.230 (1988): "Definition of bearer service categories".[12]ETS 300 217-2 (1992):"Network Aspects (NA); Connectionless BroadbandData Service (CBDS)
Part 2: Basic bearer service definition".[13]ETS 300 217-3 (1992):"Network Aspects (NA); Connectionless BroadbandData Service (CBDS)
Part 3: Definition of supplementary services".[14]ETS 300 217-4 (1992):"Network Aspects (NA); Connectionless BroadbandData Service (CBDS)
Part 4: Address screening supplementary service".[15]ETS 300 212 (1992): "Network Aspects (NA); Metropolitan Area Network (MAN)Media access control layer and physical layer specification".[16]ISO/IEC DIS 8802-1: "Information processing systems - Local area networks -Part 1: General introduction".3Definitions and abbreviations3.1DefinitionsFor the purposes of all 4 parts of this ETS, the following definitions apply:Access class: a subscription condition defining the maximum allowed sustained information rate acrossan interface at the T reference point.Access class mechanism: functions limiting the information rate across the T reference point to enforcethe access class.Duplicated PDU: duplication of a PDU occurs if a previously received PDU is received once more acrossthe same interface at the T reference point. This applies whether the destination address is an individualor a group address.Duplicated PDUs ratio: the ratio of the number of duplicated PDUs to the total number of PDUstransferred in one direction between the source interface at the T reference point and the destinationinterface at the T reference point.SIST ETS 300 217-1 E1:2003



Page 9ETS 300 217-1: December 1992The total number of transferred PDUs, here considered, includes:-correct PDUs;-incorrect PDUs.Lost and misdelivered PDUs are not considered for this definition.Duplicated PDU ratio =duplicated PDUscorrect PDUs + incorrect PDUsNOTE 1:Duplicated PDUs caused by user action such as retransmission are excluded from theduplicated PDU ratio.Extra PDUs: includes duplicated as well as misdelivered PDUs.Incorrect PDU: a PDU is declared to be incorrect if its content is different from the original sent as far asthe parts required to be transparently transferred are concerned. PDUs which are discarded by thereceiving user due to errors detected by the protocol operating across the interface at the T referencepoint are not considered incorrect.Information rate: the data rate available to the user at the T reference point excluding the overhead.Interruption: CCITT Recommendation E.800 [8], definition 4101:"Temporary inability of a service to be provided persisting for more than a given time durationcharacterised by a change beyond given limits in at least one parameter essential for the service".Lost PDU: a PDU is declared to be lost if, because of a fault of the network (or the correspondingservice), it is not delivered across the intended interface at the T reference point. Lost PDUs include alsoboth those PDUs that have to be discarded by the network due to errors detected and those PDUs thatare received by the destination user but are discarded by the destination user as a result of errorsdetected by the protocol operating across the interface at the T reference point. PDUs not delivered as aresult of conditions not being the fault of the service provider, such as non-delivery caused bysupplementary services (e.g. address screening), are not considered lost. PDUs not delivered as a resultof equipment outages at the destination or congestion across the interface at the T reference point at thedestination are also not considered lost.Lost PDU ratio: the ratio of the number of lost PDUs to the sum of lost PDUs and the total number ofPDUs transferred in one direction between the source interface at the T reference point and destinationinterface at the T reference point.The total number of transferred PDUs, here considered, includes:-correct PDUs;-incorrect PDUs.Misdelivered and duplicate
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