ETSI EN 301 164 V1.1.1 (1999-05)

Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDH leased lines; Connection characteristics

DEN/TM-03072

Prenos in multipleksiranje (TM) – Sinhrona digitalna hierarhija (SDH) – Zakupljeni vodi v SDH – Priključitvene značilnosti

General Information

• Status: Published
• Publication Date: 11-May-1999
• Technical Committee: TM 3 - Interfaces, architecture and functional requirements of transport netw
• Current Stage: 12 - Completion
• Due Date: 30-Apr-1999
• Completion Date: 12-May-1999
• Mandate: T-324
• Ref Project: SIST EN 301 164 V1.1.1:2003 - Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDH leased lines; Connection characteristics

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDH leased lines; Connection characteristics33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 301 164 Version 1.1.1SIST EN 301 164 V1.1.1:2003en01-december-2003SIST EN 301 164 V1.1.1:2003SLOVENSKI
STANDARD



SIST EN 301 164 V1.1.1:2003



EN 301 164 V1.1.1 (1999-05)European Standard (Telecommunications series)Transmission and Multiplexing (TM);Synchronous Digital Hierarchy (SDH);SDH leased lines;Connection characteristicsSIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)2ReferenceDEN/TM-03072 (as000ico.PDF)Keywordsleased line, ONP, SDH, transmissionETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail] copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: [e-mail] NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1999.All rights reserved.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)3ContentsIntellectual Property Rights.5Foreword.51Scope.62References.63Definitions, symbols and abbreviations.73.1Definitions.73.2Symbols.83.3Abbreviations.94Characteristics of VC-4, VC-3, VC-2 and VC-12 leased line connections.104.1Tolerance of Virtual Container (VC) timing.104.2Transfer delay.104.3Jitter.104.4Error performance.115Characteristics of VC-4 leased line connections.115.1Information transfer susceptance.115.2Error performance.115.2.1Bringing into service limits.115.2.2Performance objectives.115.2.3Availability.126Characteristics of VC-3 leased line connections.126.1Information transfer susceptance.126.2Error performance.126.2.1Bringing into service limits.126.2.2Performance objectives.136.2.3Availability.137Characteristics of VC-2 leased line connections.137.1Information transfer susceptance.137.2Error performance.147.2.1Bringing into service limits.147.2.2Performance objectives.147.2.3Availability.148Characteristics of VC-12 leased line connections.158.1Information transfer susceptance.158.2Error performance.158.2.1Bringing into service limits.158.2.2Performance objectives.168.2.3Availability.16Annex A (normative):Test methods.17A.1General.17A.1.1Equipment connection.17A.2Test methods.17A.2.1Leased line timing tolerance, susceptance and symmetry.17A.2.2Delay.18A.2.3Alarm Indication Signal (AIS) generation.19A.2.4Error performance.20SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)4Annex B (informative):Derivation of error performance limits.21B.1Introduction.21B.2Reference connections.21B.2.1Terrestrial connection.21B.2.2Satellite connection.22B.3Error performance objectives.22B.4Long term error performance.23B.5Error performance figures.23Annex C (informative):Defects and consequent actions at leased line connections.25C.1Explanation of defect detection and consequent actions of atomic function.25C.2Handling of defects along a leased line connection or at the leased line interface.25Annex D (informative):Configuration of a lower order VC leased line connection.28Annex E (informative):Bibliography.30History.31SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmissionand Multiplexing (TM).National transposition datesDate of adoption of this EN:16 April 1999Date of latest announcement of this EN (doa):31 July 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 January 2000Date of withdrawal of any conflicting National Standard (dow):31 January 2000SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)61ScopeThe present document specifies the technical requirements and test principles for bi-directional and symmetrical leasedline connections of SDH virtual containers, i.e. VC-4, VC-3, VC-2 and VC-12. Signals transmitted across the leased lineconnections are subject to restrictions (e.g. to the payload independent path overhead) and impairments (e.g. transferdelay, jitter, wander, errors, etc.).A connection is presented via interfaces at Network Termination Points (NTPs) and includes any equipment that mayprovide the NTP. Together with the companion standard, EN 301 165 [4] defining the network and terminal interfacepresentation, the present document describes the technical characteristics of the leased line service offered to the user.The present document is applicable for leased lines, including part time leased lines, for which the establishment orrelease does not require any protocol exchange or other intervention at the NTP.The present document specifies compliance tests for the connection requirements. The present document does notinclude details concerning the implementation of tests, nor does it include information of any relevant regulations.2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]EN 300 417-2-1: "Transmission and Multiplexing (TM); Generic requirements of transportfunctionality of equipment; Part 2-1: Synchronous Digital Hierarchy (SDH) and PlesiochronousDigital Hierarchy (PDH) physical section layer functions".[2]EN 300 417-3-1: "Transmission and Multiplexing (TM); Generic requirements of transportfunctionality of equipment; Part 3-1: Synchronous Transport Module-N (STM-N) regenerator andmultiplex section layer functions".[3]EN 300 417-4-1: "Transmission and Multiplexing (TM); Generic requirements of transportfunctionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions".[4]EN 301 165: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH): SDHleased lines; Network and terminal interface presentation".[5]ITU-T Recommendation G.826 (1996): "Error performance parameters and objectives forinternational, constant bit rate digital paths at or above the primary rate".[6]EN 300 417-1-1: "Transmission and Multiplexing (TM); Generic requirements of transportfunctionality of equipment; Part 1-1: Generic processes and performance".[7]EN 300 462-2: "Transmission and Multiplexing (TM); Generic requirements for synchronizationnetworks; Part 2: Synchronization network architecture".[8]ITU-T Recommendation M.2100 (1995): "Performance limits for bringing-into-service andmaintenance of international digital paths, sections and transmission systems".SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)73Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following terms and definitions apply.layer: concept used to allow the transport network functionality to be described hierarchically as successive levels; eachlayer being solely concerned with the generation and transfer of its "characteristic information"client/server layer: any two adjacent network layers are associated in a client/server relationship. Each transportnetwork layer provides transport to the layer above and uses transport from the layers below. The layer providingtransport is termed a "server", the layer using transport is termed "client"Remote Defect Indication (RDI): signal which conveys the defect status of the characteristic information received bythe Trail Termination sink function back to the network element which contains the characteristic informationoriginating trail termination source functionRemote Error Indication (REI): signal which conveys either the exact or truncated number of error detection codeviolations within the characteristic information (as detected by the trail termination sink function) back to the networkelement which contains the characteristic information originating trail termination source functionAU-4-AIS: STM-N signal in which the entire capacity of an Administrative Unit 4 (AU-4) is set to logic "1"TU-m-AIS: STM-N signal in which the entire capacity of a TU-m is set to logic "1"Characteristic Information (CI): signal of specific rate and format which is transferred within and between"sub-networks", and presented to an "adaptation" function for "transport" by the server layer networkConnection Point (CP): "reference point" where the output of a "trail termination source" or a "connection" is bound tothe input of another "connection", or where the output of a "connection" is bound to the input of a "trail terminationsink". The "connection point" is characterized by the information which passes across it. A bi-directional "connectionpoint" is formed by the association of a contra-directional pairTermination Connection Point (TCP): special case of a "connection point" where a "trail termination" function isbound to an "adaptation" function or a "connection" functiondefect: density of anomalies has reached a level where the ability to perform a required function has been interrupted.Defects are used as input for PERFORMANCE MANAGEMENT, the control of consequent actions, and thedetermination of fault causeSIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)83.2SymbolsThe diagrammatic conventions and nomenclature used in the present document for adaptation, termination andconnection functions (used to describe the atomic functions) are taken from EN 300 417-1-1 [6] and are shown infigure 1.SinkSinkSourceSourcebidirectionalbidirectionalbidirectionalunidirectionalAdaptation functions from Server layer Y to Client layer ZY/ZY/ZY/ZYYYTrail Termination functions in layer YConnection functions in layer YYYY/ZYY/ZYY/ZYbidirectionalSourceSinkTrail Termination function in layer Y and Adaptation function to layer ZNOTE:If the above symbols are used for generic figures, i.e. not for specific layers, the layer references Y and Zmay be omitted. Alternatively, the references may be to the type of function or layer, e.g. supervision,protection.Figure 1: Symbols and diagrammatic conventionsSIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)93.3AbbreviationsFor the purposes of the present document, the following abbreviations apply:AAdaptation functionAIAdapted InformationAISAlarm Indication SignalAUAdministrative UnitAU-nAdministrative Unit, level nBBEBackground Block ErrorBBERBackground Block Error RatioBIPBit Interleaved ParityBIP-NBit Interleaved Parity, width NCConnection functionCICharacteristic InformationCPConnection PointEMCElectromagnetic CompatibilityESErrored SecondES1STM-1 Electrical SectionLOFLoss Of FrameLOMLoss Of MultiframeLOPLoss Of PointerLOSLoss Of SignalMSMultiplex SectionMS1STM-1 Multiplex SectionMS4STM-4 Multiplex SectionNENetwork ElementNNINetwork Node InterfaceNTNetwork TerminationNTPNetwork Termination PointOSOptical SectionOS1STM-1 Optical SectionOS4STM-4 Optical SectionPDHPlesiochronous Digital HierarchyPLMPayLoad MismatchRDIRemote Defect IndicationREIRemote Error IndicationRIRemote InformationRXReceiveS12VC-12 path layerS2VC-2 path layerS3VC-3 path layerS4VC-4 path layerSDHSynchronous Digital HierarchySESSeverely Errored SecondSFSignal FailSkSinkSoSourceSSFServer Signal FailSTMSynchronous Transport ModuleSTM-NSynchronous Transport Module, level NTCPTerminal Connection PointTETerminal EquipmentTIMTrace Identifier MismatchTSFTrail Signal FailTSSTest Signal StructureTSSxTest Signal Structure 1, 3 or 4TTTrail Termination functionTTPTrail Termination PointTUTributary UnitSIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)10TU-mTributary Unit, level mTXTransmitUNEQUnequippedUTCUniversal Time Co-ordinatedVCVirtual ContainerVC-nVirtual Container, level n4Characteristics of VC-4, VC-3, VC-2 and VC-12leased line connections4.1Tolerance of Virtual Container (VC) timingRequirement: The leased line connection shall carry user timing with a tolerance of ±4,6 ppm.NOTE:For optimum jitter and wander performance of Plesiochronous Digital Hierarchy (PDH) signal carriedover a end to end Virtual Container (VC), it is recommended to generate VC timing at the nominalfrequency. The recommended method of Synchronous Digital Hierarchy (SDH) synchronization isspecified in EN 300 462-2 [7]. It should be noted that a systematic offset of the VC timing from thenominal VC frequency will result in periodic pointer adjustments at the output of the VC leased lineconnection. The SDH section signal which is transmitted from the Network Termination (NT) is carrying,under normal condition, the timing of the leased line network and may be used to generate the VC timingat the terminal interface.4.2Transfer delayRequirement: The requirement depends upon whether satellite connection is involved in the connection or not:- for connection where satellite transmission is not involved, the one way end-to-end delay shall be less than(10 + 0,01 G) ms, where G is the geographical distance in kilometres; or- for connection where satellite transmission is involved, the one way end-to-end delay shall be less than 350 ms.4.3JitterThe leased line connection shall operate as specified when the jitter at the leased line input is within the limits given inthe companion standard EN 301 165 [4].NOTE 1:The jitter and wander requirements of the Synchronous Transport Module, level N (STM-N) sectionlayers are given at the associated Physical Section Layer to Regenerator Section Layer adaptationfunctions as specified in EN 300 417-2-1 [1].NOTE 2:Jitter requirements of the VC-4 path are specified by the requirements for AU-4 pointer justificationevents of the Multiplex Section Layer to VC-4 path Layer adaptation function which is specified inEN 300 417-3-1 [2].NOTE 3:Jitter requirements of the lower order VC paths are specified by the requirements for TU-3/2/12 pointerjustification events of the "VC-4 Layer to VC-3, VC-2 and VC-12 Layer Adaptation functions, S4/Sx_A"which are specified EN 300 417-4-1 [3].NOTE 4:Wander at the section layer may create pointer justification at VC path layers. Existing ETSs for leasedline connection characteristics consider wander is irrelevant for a single leased line connection. Thatapproach might be unacceptable for SDH leased lines.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)114.4Error performanceITU-T Recommendation G.826 [5] is used as a basis for deriving the error performance objectives specified in thepresent document. The performance parameters referred to in the present document are as those defined in ITU-TRecommendation G.826 [5]. The performance objective tables in the present document apply for a 24 hour test period.They are derived using ITU-T Recommendation G.826 [5] as a basis. Detailed derivation of the performance objectivesis described in annex B of the present document.5Characteristics of VC-4 leased line connections5.1Information transfer susceptanceRequirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-4 exceptthe N1 byte when the VC-4 is generated according to EN 301 165 [4], subclause 4.3.1. The structure of a VC-4 is shownin figure 2. The bytes of a VC-4 are transmitted with a frequency of 8 kHz, i.e. the frame length is 125 ms.When a defect occurs:- along the leased line connection; or- at the leased line input (refer to EN 301 165 [4]);AU4-AIS shall occur at the far end output.VC-4 payload(9 x 260 bytes)129J1C2B3F2H4G1F3K3N112261NOTE:The contents of B3 may change at the tandem connection monitoring processes. The integrity of parityinformation of B3 is maintained through the leased line.Figure 2: Structure of a VC-45.2Error performance5.2.1Bringing into service limitsThere are no requirements under the present document.5.2.2Performance objectivesRequirement: The performance of a VC-4 leased line either in service or taken out of service in order to perform anerror measurement shall meet the requirements of table 1.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)12Table 1: Performance objectives over a 24 hour test period for a block length of 18 792 bits (VC-4)PerformanceTerrestrialSatelliteparameterRatio (mean)S1 (note)Ratio (mean)S1 (note)ES0,08£ 6 746 s0,12£ 10 575 sSES0,001£ 68 s1,56 ´ 10-3£ 112 sBBE1,0 ´ 10-4£ 68 594 blocks1,56 ´ 10-4£ 107 170 blocksNOTE:The threshold S1 is defined in clause B.4.5.2.3AvailabilityThere are no requirements under the present document.6Characteristics of VC-3 leased line connections6.1Information transfer susceptanceRequirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-3 exceptthe N1 byte. The structure of a VC-3 is shown in figure 3. The bytes of a VC-3 are transmitted with a frequency of8 kHz, i.e. the frame length is 125 ms.When a defect occurs:- along the leased line connection; or- at the leased line input (refer to EN 301 165 [4]);TU3-AIS shall occur at the far end output.VC-3 payload(9 x 84 bytes)129J1C2B3F2H4G1F3K3N11285NOTE:The contents of B3 may change at the tandem connection monitoring processes. The integrity of parityinformation of B3 is maintained through the leased line.Figure 3: Structure of a VC-36.2Error performance6.2.1Bringing into service limitsThere are no requirements under the present document.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)136.2.2Performance objectivesRequirement: The performance of a VC-3 leased line either in service or taken out of service in order to perform anerror measurement shall meet the requirements of table 2.Table 2: Performance objectives over a 24 hour test period for a block length of 6 120 bits (VC-3)PerformanceTerrestrialSatelliteparameterRatio (mean)S1 (note)Ratio (mean)S1 (note)ES0,0375£ 3 126 s0,059£ 4 912 sSES0,001£ 68 s1,56 ´ 10-3£ 112 sBBE1,0 ´ 10-4£ 68 594 blocks1,56 ´ 10-4£ 107 170 blocksNOTE:The threshold S1 is defined in clause B.4.6.2.3AvailabilityThere are no requirements under the present document.7Characteristics of VC-2 leased line connections7.1Information transfer susceptanceRequirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-2 exceptthe N2 byte. The structure of a VC-2 is shown in figure 4. The bytes of a VC-2 are transmitted with a frequency of2 kHz, i.e. the frame length is 500 ms.When a defect occurs:- along the leased line connection; or- at the leased line input (refer to EN 301 165 [4]);TU2-AIS shall occur at the far end output.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)1412107108109215214216321322323428V5J2K4N2VC-2 payload(106 bytes)VC-2 payload(106 bytes)VC-2 payload(106 bytes)VC-2 payload(106 bytes)NOTE:The contents of V5[1,2] may change at the tandem connection monitoring processes. The parityinformation of the BIP-2 is maintained through the leased line.Figure 4: Structure of a VC-27.2Error performance7.2.1Bringing into service limitsThere are no requirements under the present document.7.2.2Performance objectivesRequirement: The performance of a VC-2 leased line either in service or taken out of service in order to perform anerror measurement shall meet the requirements of table 3.Table 3: Performance objectives over a 24 hour test period for a block length of 3 424 bits (VC-2)PerformanceTerrestrialSatelliteparameterRatio (mean)S1 (note)Ratio (mean)S1 (note)ES0,025£ 2 067 s0,039£ 3 254 sSES0,001£ 68 s1,56 ´ 10-3£ 112 sBBE1,0 ´ 10-4£ 17 017 blocks1,56 ´ 10-4£ 26 628 blocksNOTE:The threshold S1 is defined in clause B.4.7.2.3AvailabilityThere are no requirements under the present document.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)158Characteristics of VC-12 leased line connections8.1Information transfer susceptanceRequirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-12 exceptthe N2 byte. The structure of a VC-12 is shown in figure 5. The bytes of a VC-12 are transmitted with a frequency of2 kHz, i.e. the frame length is 500 ms.When a defect occurs:- along the leased line connection; or- at the leased line input (refer to EN 301 165 [4]);TU12-AIS shall occur at the far end output.12353637717072105106107140V5J2K4N2VC-12 payload(34 bytes)VC-12 payload(34 bytes)VC-12 payload(34 bytes)VC-12 payload(34 bytes)NOTE:The contents of V5[1,2] may change at the tandem connection monitoring processes. The integrity ofparity information BIP-2 is maintained through the leased line.Figure 5: Structure of a VC-128.2Error performance8.2.1Bringing into service limitsThere are no requirements under the present document.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)168.2.2Performance objectivesRequirement: The performance of a VC-12 leased line either in service or taken out of service in order to perform anerror measurement shall meet the requirements of table 4.Table 4: Performance objectives over a 24 hour test period for a block length of 1 120 bits (VC-12)PerformanceTerrestrialSatelliteparameterRatio (mean)S1 (note 1)Ratio (mean)S1 (note 1)ES0,02£ 1 645 s0,031£ 2 592 sSES0,001£ 68 s1,56 ´ 10-3£ 112 sBBE (note 2)1,0 ´ 10-4£ 17 017 blocks2,34 ´ 10-4£ 26 628 blocksNOTE 1:The threshold S1 is defined in clause B.4.NOTE 2:ITU-T Recommendation G.826 [5], version 1996 changed the BBER from3 ´ 10-4 to 2 ´ 10-4.8.2.3AvailabilityThere are no requirements under the present document.SIST EN 301 164 V1.1.1:2003



ETSIEN 301 164 V1.1.1 (1999-05)17Annex A (normative):Test methodsA.1GeneralThis annex describes the test principles to determine the compliance of a connection against the r
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