core sts and kpi
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Core Network STS and KPI
Heiry Hamzah24-April-2010
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Agenda
• KPI• STS in MGW• STS in MSC
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KPI
KPI • Key Performance Indicator (KPI) — a main
measurement indicator, used to highlight the status of vital functionality
• Performance Indicator (PI) — a supporting measurement indicator, used both to provide additional information about functionality covered by the KPIs as well as for providing information about additional functionality not directly covered by the KPIs
Microsoft Office Word 97 - 2003 Document
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MSC Statistic
• STS Object typeTrunkroute, C7SL1, UPDLOCAT, NBRMSCLST, EOS, LOAS, HLRSTAT, LOSSROUTE
• CountersEvery STS Object type contain Counters which is used for achieving the statistic.
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TrunkrouteCounter DescriptionNCALLSI Number of detected seizures
(incoming route). The counter is stepped when anaccepted seizure is received.
NCALLSO Number of detected seizures (outgoing route)
NOVERFLOWI Number of calls with congestion (incoming route)
NOVERFLOWO Number of calls with congestion (outgoing route)
NDEV Number of devices in the trunk route (devices in pre or post service state are excluded)
NSCAN Number of accumulationsNTRALACCI Accumulated traffic level (incoming
route)NTRALACCO Accumulated traffic level (outgoing
route)NANSWERSI Number B-answers in the incoming
routeNANSWERSO Number B-answers in the outgoing
route
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Trunk Route Continue
• Trunk utilization• Call Attempt• ASR
Sample of the Formula
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C7SL1Counter DescriptionNSIFTR Number of SIF and SIO octets
transmittedNSIFSRE Number of SIF and SIO octets
receivedNMSUTR Number of MSUs transmittedNMSURE Number of MSUs received
Counter DescriptionUNAVAILDUR Duration of SL unavailability (all
reasons) in secondsASLDUR Duration of link In-Service state in
seconds
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C7SL1…Continue
• Signalling link utilization• C7 availability
FormulaPI Link-avail_ETSI = ASLDUR / (ASLDUR+UNAVAILDUR) * 100%
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UPDLOCATCounter DescriptionNLOCOLDTOT Total nr. of location updating attempts for already
registered subscribers over A-interface and Iu-interface
NLOCNRGTOT Total nr. of location updating attempts from non-registered subscribers (IMSI attach, normal LU or periodic LU) over A-interface and Iu-interface
NLOCOLDSUCC Nr. of successful location updating for already registered subscribers over A-interface and Iu-interface
NLOCNRGSUCC Nr. of successful location updating for non-registered subscribers over A-interface and Iu-interface
NLOCNRG2TOT Number of location updating attempts from non-registered subscribers (IMSI attach, normal location updating, or periodic updating) over Gs-Interface
NLOCNRG2SUCC Number of successful location updatings for non-registered subscribers over Gs-Interface
NLOCOLD2TOT Number of location updating attempts for already registered subscribers over Gs-Interface
NLOCOLD2SUCC Number of successful location updatings for already registered subscribers over Gs-Interface
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UPDLOCAT…Continue
• LOCATION UPDATE performance
Formula
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NBRMSCLST
• Object type for Handover InterMSC performance
Counter DescriptionNNBRHBANTOT Number of basic handover attempts to a neighbouring MSC
NNBRHBANSUCC Number of successful basic handovers to a neighbouring MSC
NNBRHSANTOT Number of subsequent handover attempts from the neighbouring MSC back to the anchor MSC/VLR Server
NNBRHSANSUCC Number of successful subsequent handovers from the neighbouring MSC back to the anchor MSC/VLR Server
NNBRHINATOT Number of incoming handover attempts from neighbouring MSC (incoming handovers include basic handovers and subsequent handovers from neighboring MSC)
NNBRHINASUCC Number of successful incoming handovers from neighbouring MSC(incoming handovers include basic handovers and subsequent handovers from neighboring MSC)
NNBRHSNATOT Number of subsequent handover attempts to neighbouring MSC (back to anchor or to third MSC)
NNBRHSNASUCC Number of successful subsequent handovers to neighbouring MSC(back to anchor or to third MSC)
NNBRHTHITOT Number of subsequent handover attempts from neighbouring MSC to third MSC. The target MSC is the measuring object.
NNBRHTHISUCC Number of successful subsequent handover attempts from neighbouring MSC to third MSC. The target MSC is the measuring object.
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LOAS and HLRSTAT
• LOAS is the general Object type that found in all AXE platform, it shown the processor Load
• HLRSTAT is the object type of MSC that will shown the subscriber attached and registered
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LOSSROUTE
• Last but not the least, LOSSROUTE will shown all the Route that used for IN, Interrogation, and Announcement
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EOS
• Is the Statistic for End Of Selection• Related to the ISUP release Cause.• Useful for troubleshooting in the operation
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Statistic In MGW
• In MGW the data collected called Performance Measurement data, PM
• It collected in the OSS for post processing, and the post processing tool that used is the Business object
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PM Counter in MGW
• MediaStream Channel utilization rate• TDM termination Group• Processor Load• MTP2 Signalling Usage• AAL2 Traffic per VC• AAL2 Pipe utilization
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Business Object
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Media Stream• Erlang Load in the MGW
The current traffic load = MgwApplication.pmNrOfMediaStreamChannelsBusy /2.005
• The Software Licensing, Media Stream Channel Utilization Rate measurement is used for calculating the utilization rate of licensed media stream channels, that is utilized licensed software capacity. The measurement is made for physical M-MGw.Media stream channel utilization rate (in %) = (MgwApplication.pmNrOfMediaStreamChannelsBusy / MgwApplication.maxNrOfLicMediaStreamChannels) * 100
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TDM Termination Group
• The TDM Termination Group Utilization Rate measurement is used for calculating the current utilization rate of a Time Division Multiplexing (TDM) termination group and the amount of TDM traffic in the node.
• TDM group utilization rate (as %)= (TdmTermGrp.pmNrOfTdmTermsBusy /MAX_NR_OF_TDM_TERMS) * 100
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Processor Load
• The Processor Load measurement is used for calculating the processor load of a board
• The measurement will provide the average processor load of a board for the last 5 minutes
• From processor load point of view, General Purpose Boards used for signalling are considered to be the most critical ones to monitor
• FormulaThe average processor load of a board (in %) = PlugInUnit.pmProcessorLoad
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GCP statistic
• The GCP Link Uptime measurement shows the time in seconds the GCP link has been in operation.
• GCP link uptime in seconds = Vmgw.pmGcpSystemUpTime
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MTP2 Signalling Link usage
• The MTP2 Signalling Link Usage measurements are used to show the number of received and sent Message Signal Units (MSUs) per second, as well as kbps, during the measurement period
• Received kbps on an MTP2 link = ((Mtp2TerminationPoint.pmNoOfSIOSIFReceived * 8) + (Mtp2TerminationPoint.pmNoOfMSUReceived *MTP2_MSU_HDR)) / (1000 * MEAS_LENGTH)
• Transmitted kbps on an MTP2 link = ((Mtp2TerminationPoint.pmNoOfSIOSIFTransmitted * 8) + (Mtp2TerminationPoint.pmNoOfMSUTransmitted *MTP2_MSU_HDR)) / (1000 * MEAS_LENGTH)
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AAL2• The Usage Rate of Received and Transmitted ATM Cells on an ATM Port
measurements are used for calculating the usage rate (as %) on an ATM port during the measurement period. The measurement is made for ATM port.
Usage rate of received cells = (1 – ((AtmPort.pmReceivedAtmCells / MEAS_LENGTH) / 353,207) * 100)
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Thank You
Q and A