ETSI EN 301 129 V1.1.2 (1999-05)

Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Synchronous Digital Hierarchy (SDH); System performance monitoring parameters of SDH DRRS

REN/TM-04037a

Prenos in multipleksiranje (TM) – Digitalni radiorelejni sistemi (DRRS) – Sinhrona digitalna hierarhija (SDH) – Parametri za nadzorovanje lastnosti sistemov SDH DRRS

General Information

• Status: Published
• Publication Date: 30-May-1999
• Technical Committee: TM 4 - TM Fixed Radio Systems
• Current Stage: 12 - Completion
• Due Date: 14-Jun-1999
• Completion Date: 31-May-1999
• Ref Project: SIST EN 301 129 V1.1.2:2003 - Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Synchronous Digital Hierarchy (SDH); System performance monitoring parameters of SDH DRRS

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prenos in multipleksiranje (TM) – Digitalni radiorelejni sistemi (DRRS) – Sinhrona digitalna hierarhija (SDH) – Parametri za nadzorovanje lastnosti sistemov SDH DRRSTransmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Synchronous Digital Hierarchy (SDH); System performance monitoring parameters of SDH DRRS33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 301 129 Version 1.1.2SIST EN 301 129 V1.1.2:2003en01-december-2003SIST EN 301 129 V1.1.2:2003SLOVENSKI
STANDARD



SIST EN 301 129 V1.1.2:2003



EN 301 129 V1.1.2 (1999-05)European Standard (Telecommunications series)Transmission and Multiplexing (TM);Digital Radio Relay Systems (DRRS);Synchronous Digital Hierarchy (SDH);System performance monitoring parameters of SDH DRRSSIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)2ReferenceDEN/TM-04037 (agc00idc.PDF)KeywordsSDH, DRRS, transmission, performanceETSIPostal 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 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)3ContentsIntellectual Property Rights.5Foreword.51Scope.62References.73Symbols and abbreviations.83.1Symbols.83.2Abbreviations.84Introduction.95Functional architecture.106Radio specific maintenance parameters.106.1Radio Synchronous Physical Interface (RSPI) performance management.106.1.1Performance primitives.106.1.1.1Received Level (RL).106.1.1.2Transmitted Level (TL).116.1.2Performance events.126.1.2.1Received Level Threshold Second (RLTS).126.1.2.2Received Level Tide Mark (RLTM).126.1.2.3Transmitted Level Threshold Second (TLTS).126.1.2.4Transmitted Level Tide Mark (TLTM).136.1.3Performance data collection and history treatment.136.1.4Performance data threshold treatment.136.2Radio Protection Switching (RPS) performance management.146.2.1Performance primitives.146.2.1.1Protection Switch Actual (PSA).146.2.1.2Protection Switch Request (PSR).146.2.2Performance events.146.2.2.1Protection Switch Actual Count (PSAC).146.2.2.2Failed Switch Request Count (FSRC).156.2.2.3Protection Switch Actual Duration (PSAD).156.2.2.4Failed Switch Request Duration (FSRD).166.2.3Performance data collection and history treatment.166.2.4Performance data threshold treatment.176.3Radio OverHead Access (ROHA) performance management.177Radio specific transmission quality monitoring.17Annex A (informative):Description of radio specific performance monitoring at referencepoint XT dependent on the allocation of RPS functional block.18Annex B (informative):Application of additional performance parameters for faultmanagement and error performance management.21B.1 Examples of RSPI and RPS events and counters behaviours.21B.1.1Received Level (RL) performance primitive, Received Level Tide Mark (RLTD) and Received LevelThreshold Second (RLTS) performance events.21B.1.2RPS performance events.23B.2Example of usage of additional performance parameters in case of fading phenomena andequipment fault.25B.2.1Rain induced fading event.25B.2.1.1DRSS without ATPC.25B.2.1.2Rain induced fading event: DRRS with the ATPC.26B.2.2Far end equipment failure at Tx side.27SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)4B.2.3Unexpected bad quality in a high frequency SDH DRRS.28B.2.3.1Interference.28B.2.3.2Additional signal loss.28B.2.3.3Equipment degradation.29B.2.4Fading effects in a low frequency SDH DRRS.29B.2.5Unexpected bad quality in a low frequency SDH DRRS.30B.2.5.1Single hop.30B.2.5.2Protected section.30B.3Example of maintenance principles.31B.3.1High frequency DRRS in configuration without protection switching.31B.3.1.1DRRS implemented as a Regenerator Section (RS).31B.3.1.1.1Fault detection and fault analysis.32B.3.1.1.2Maintenance procedure based on error performance parameters.33B.3.1.2DRRS implemented as a Multiplex Section.34B.3.1.2.1Fault detection and fault analysis.35B.3.1.2.2Maintenance procedure based on error performance parameters.35B.3.2DRRS with 1+1 protection switching.35B.3.2.1DRRS implementing protection type C.35B.3.2.1.1Maintenance procedure based on error performance parameters.37Annex C (informative):Performance monitoring functional architecture.38C.1Performance primitive and event generation.38C.2Data collection, history and threshold treatment architecture.38C.2.115 minute register.39C.2.224 hour register.40C.2.3Threshold crossing notification.40C.2.4History register.40History.41SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (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.fr/ipr or 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).The present document describes the performance monitoring functional architecture and requirements which are specificto the Digital Radio Relay System (DRRS) Network Elements (NE) that use the Synchronous Digital Hierarchy (SDH)multiplexing structure.The present Version 1.1.2 has been published in order to correct a mistake within table 1. "R*" was omitted in the lastcolumn, last row of table 1.National transposition datesDate of adoption of this EN:18 September 1998Date of latest announcement of this EN (doa):31 December 1998Date of latest publication of new National Standardor endorsement of this EN (dop/e):30 June 1999Date of withdrawal of any conflicting National Standard (dow):30 June 1999SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)61ScopeThe present document defines the additional specific performance monitoring functional architecture and requirementsto be used for management of Digital Radio Relay Systems (DRRS) which use the Synchronous Digital Hierarchy(SDH).Considering that:-ETS 300 635 [4] and ITU-R Recommendation F.750 [3] define the SDH radio specific functional blocks fortransmission at STM-n data rate;- ETS 300 785 [5] and ITU-R Recommendation F.750 [3] define the SDH radio specific functional blocks fortransmission at Synchronous Transport Module 0 (STM-0) data rate;-EN 301 167 [6], ETS 300 417 [7], ITU-T Recommendations G.783 [1] and G.784 [2] define the performancemonitoring architecture and requirements for generic functional blocks used on SDH DRRS and other SDHequipment;-ITU-T Recommendation M.3010 [8] defines the standardized logical and functional TelecommunicationManagement Network (TMN) architecture.The present document defines:-the specific performance primitives and events to be used for performance management of radio specificfunctional blocks;-the general requirements for history treatment associated to each performance event;-the general requirements for thresholding treatment associated to each performance event;-the specific transmission quality information which is required for maintenance purpose.The present document does not define:-the F interface performance monitoring;-the performance monitoring related to non radio specific functional blocks;-the information model to be used on Q interface which is on the study in TC TMN, (ES 201 652 [18]).-the protocol stack to be used for the message communication function;-any radio specific additional performance parameter to be used at network level management.The present document applies on each SDH DRRS independently of the transmission data rate supplied (STM-n orSTM-0).The parameters defined in the present document are only intended to be used for radio equipment maintenance.The present document should provide guidance and supporting information for the definition of object-oriented modelswithin SDH DRRS.It is not required for that equipment developed prior to the present document to be fully compliant with the presentdocument.SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)72ReferencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications without mention of a specific version, in which case 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]ITU-T Recommendation G.783 (1994): "Characteristics of synchronous digital hierarchy (SDH)equipment functional blocks".[2]ITU-T Recommendation G.784 (1994): "Synchronous digital hierarchy (SDH) management".[3]ITU-R Recommendation F.750: "Architectural and functional aspects of radio-relay systems forSDH-based networks".[4]ETS 300 635: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDHRadio specific functional blocks for transmission of M x STM-N".[5]ETS 300 785: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDHRadio specific functional blocks for transmission of M x sub-STM-1".[6]EN 301 167: "Transmission and Multiplexing (TM); Management of Synchronous DigitalHierarchy (SDH) transmission equipment; Fault management and performance monitoring;Functional description".[7]ETS 300 417: "Transmission and Multiplexing (TM); Generic functional requirements forSynchronous Digital Hierarchy (SDH) equipment".[8]ITU-T Recommendation M.3010: "Principles for a Telecommunications management network".[9]ITU-T Recommendation G.826: "Error performance parameters and objectives for internationalconstant bit rate digital paths at or above the primary rate".[10]ITU-T Recommendation G.EPMRS: "Error Performance Events for SDH Multiplex Sections".[11]ETS 300 411: "Performance monitoring information model for the Network Element (NE) view".[12]ITU-T Recommendation G.774.01: "Synchronous Digital Hierarchy (SDH) performancemonitoring for the network element view".[13]ITU-T Recommendation G.707 (1996): "Network node interface for the synchronous digitalhierarchy (SDH)".[14]Void.[15]TR 101 035: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH) aspectsregarding Digital Radio Relay Systems (DRRS)".[16]ITU-T Recommendation M.20: "Maintenance philosophy for telecommunications networks".[17]ITU-T Recommendation G.861: "Principles and guidelines for the integration of satellite and radiosystems in SDH transport networks".SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)8[18]ES 201 652: "Telecommunications Management Network (TMN); Radio specific performancemonitoring information model for Synchronous Digital Hierarchy (SDH) radio relay networkelement".3Symbols and abbreviations3.1SymbolsFor the purposes of the present document, the following symbols apply:dBdecibeldBmdecibel relative to 1 milliWatt3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:ATPCAutomatic Transmit Power ControlBBEBackground Block ErrorDRRSDigital Radio Relay SystemESErrored SecondEWEarly WarningFECForward Error CorrectionFSRDFailed Switch Request DurationFSRCFailed Switch Request CountHBERHigh Bit Error RateHOHigh OrderIFIntermediate FrequencyLBERLow Bit Error RateLOSLoss of SignalMCFMessage Communication FunctionMSMultiplex SectionMSAMultiplex Section AdaptationMSTMultiplex Section TerminationNENetwork ElementOSOperating SystemPOHPath OverHeadPMPerformance MonitoringPSAProtection Switch ActualPSACProtection Switch Actual CountPSADProtection Switch Actual DurationPSRProtection Switch RequestRFRadio FrequencyRLReceived LevelRLTDReceived Level Tide MarkRLTMReceived Level Tide MarkRLTSReceived Level Threshold SecondROHARadio OverHead AccessRPSRadio Protection SwitchingRRRRadio Relay RegeneratorRRTRadio Relay TerminalRSRegenerator SectionRSOHRegenerator Section OverHeadRSPIRadio Synchronous Physical InterfaceRSTRegenerator Section TerminationSDHSynchronous Digital HierarchySESSeverely Erorred SecondSEMFSynchronous Element Management FunctionSIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)9SFSignal FailSTM-nSynchronous Transport Module nSub-STM-1Sub-Synchronous Transport Module 1 (also defined as STM-0 inITU-T Recommendation G.861 [17])TLTransmitted LevelTLTDTransmitted Level Tide MarkTLTMTransmitted Level Tide MarkTLTSTransmitted Level Threshold SecondTMNTelecommunication Management NetworkUASUnAvailable SecondUATUnAvailable TimeVC-nVirtual Container n4IntroductionThe SDH multiplexing frame structure allows in-service quality transmission monitoring at different levels such asregenerator and multiplex sections and low/high order paths.SDH Performance Monitoring (PM) is described starting from the definition of the performance primitives, events andparameters and defining the PM data collection and history treatment together with the way to present PM informationto a managing system at a Q3 interface.The whole matter is covered by several ITU-T Recommendations and ETSI standards e.g. ITU-T RecommendationsG.783 [1], G.784 [2], G.826 [9], G.EPMRS [10], and G.774.01 [12]; EN 301 167 [6], ETS 300 411 [11] andETS 300 417 [7].SDH radio Network Elements (NE) may terminate, depending on applications, regenerator and multiplex sections andalso high/low order paths. For each one of the above SDH layers implemented inside a SDH radio NE, the associatedstandardized PM shall be implemented.Signal transmission on microwave radios may be affected by mid-air propagation phenomena that may result intransmission quality degradation. In order to counteract such typical radio feature several counter measures are or maybe implemented inside radio transmission equipment.The close relationship between transmission quality and radio link propagation cannot be well understood if the PM islimited only to quality of service.In particular it is not possible, for a given measured quality, to discriminate among errors due to equipmentdegradations, countermeasure unefficiency and unusual or unpredicted bad propagation.From such a reason the present document covers the need to have radio specific performance parameters to be used inclose conjunction with the ordinary ones related to quality transmission: Severely Errored Second (SES), ErroredSecond (ES), Background Block Error (BBE) and UnAvailable Second (UAS).Radio specific PM defines new radio specific performance primitives, events and parameters with associatedrequirements for data collection, threshold and history treatment.Radio specific PM deals with monitoring of the radio specific functional blocks Radio Synchronous Physical Interface(RSPI) and Radio Protection Switching (RPS) as defined in ETS 300 635 [4], ETS 300 785 [5] andITU-R Recommendation F.750 [3].Clause 5 describes the general architecture of the radio specific PM process.All the radio specific performance parameters defined in the present document are not required to meet qualityobjectives. Their meaning is consistent only in the hops or link which they refer to. Comparisons among different hopsor links are not meaningful. A true performance comparison among different hops or links can be done only on the baseof the generic SDH quality of service parameters like ES, SES, BBE and UAS.SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)10From a management point of view the following applications may be envisaged:-maintenance application:The presence of the 15 minutes register counters with associated threshold crossing control may be used totrigger threshold crossing notifications to a managing system. This process may be helpful to indirectly localizepossible degradations of hardware devices like ATPC devices, feeders and antennas for example.-SDH transmission quality parameters qualification:The presence of the 15 minutes and 24 hours current register counters like SES, ES, BBE and UAS associatedfor each regenerator and multiplex sections terminated in a Radio NE allows to have transmission qualitymonitoring of the same sections. The association of radio specific counters on registers of the same period allowsto qualify them.In particular the values of radio specific counters may give indications on occurrence of propagation fading andswitching activity during these periods helping in the distinction between quality degradation due to equipment orpropagation.-long term statistics:The presence of 24 hours history register radio specific counters together with the possibility to transfer theirassociated values to a managing system allows the collection at OS level of long term statistics.This information may also be used to verify the existing propagation prediction methods which are usually usedfor link design or develop new ones.5Functional architectureThe functional architecture of the radio specific PM (data collection, history and threshold treatment) is compliant toITU-T Recommendation G.784 [2] and EN 301 167 [6].This clause does not define any additional functional architecture requirements.The functional architecture is reported in the informative annex C for the reader convenience.6Radio specific maintenance parameters6.1Radio Synchronous Physical Interface (RSPI) performancemanagement6.1.1Performance primitives6.1.1.1Received Level (RL)The RL is the level of the estimated received power at the input of the receiver and may be used to understand if apredefined period has been affected by fading activity. It may be also used to identify some permanent loss of receivedpower due to hardware failures.It must be outlined that this level is an estimation of the received power and that it may be affected by a certain amountof inaccuracy that is system dependent.SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)11Moreover the interpretation of the associated values depends on several factors:-the type of transmission used, i.e. bi-carriers, mono carrier systems;-the fact that it is usually associated to a wide-band measure;-the employed frequency.The RL shall be a performance primitive available at the S50 reference point of the RSPI functional block.This level shall be readable by a managing system on request.The parameter unit shall be expressed in dBm and represented by the rounded nearest integer.In the case that an Intermediate Frequency (IF) combiner is used as a fading countermeasure, only one performanceprimitive is required.In this case this performance primitive is represented by either the level of the combined signal or by the level of thebest single received input signals according to their availability.In the case that STM-4 reception is implemented be several receivers (even if it is modelled by one single RSPIfunctional block) then one RL shall be monitored per each receiver implementing the block. On the consequence theS50 reference point may provide a multiple RL performance data table.6.1.1.2Transmitted Level (TL)This subclause applies only when the Automatic Transmit Power Control (ATPC) is present. There are no requirementson TL when the ATPC is not present.The TL is the level of the estimated transmitted power at the transmitter output. It may be used to monitor the ATPC ofa transmitter.It may also be used to identify periods of fading activity.NOTE:Currently implemented ATPC controls are of two kinds:Continuous power tracking where a control loop keeps the receiver level constant from the activationthreshold down to a fading attenuation equal to the ATPC range, in this case the TL may assume anyvalue within the ATPC range.Step control power where only one or few power steps may be activated by the receiver level thresholdswithout any control loop, in the latter case the TL assumes discrete values within the ATPC range.Similar considerations can be done for the TL as reported in subclause 6.1.1.1 for the RL.The TL shall be a performance primitive available at S50 reference point of the RSPI functional block.This level shall be readable by a managing system on request.The TL level is represented by two values:-an integer fixed value expressed in dBm defining the nominal i.e. the maximum transmitted power value which isequipment dependent;-an integer offset value expressed in dB representing the variation with respect to the nominal value.In the case that STM-4 transmission is implemented by several transmitters (even if it is modelled by one single RSPIfunctional block) then one TL shall be monitored per each transmitter implementing the block. On the consequence theS50 reference point may provide a multiple TL performance data table.SIST EN 301 129 V1.1.2:2003



ETSIETSI EN 301 129 V1.1.2 (1999-05)126.1.2Performance events6.1.2.1Received Level Threshold Second (RLTS)The RLTS event is defined as a one second period during which the detected RL value is below a predefined threshold.The associated predefined threshold shall be given in dBm and it is a characteristic of the event definition. The facilityof assigning the thres
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