Ericsson Core Sts and Kpi

Core Network STS and KPI Heiry Hamzah 24-April-2010

Agenda • KPI • STS in MGW • STS in MSC

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

MSC Statistic • STS Object type Trunkroute, C7SL1, UPDLOCAT, NBRMSCLST, EOS, LOAS, HLRSTAT, LOSSROUTE • Counters Every STS Object type contain Counters which is used for achieving the statistic.

Trunkroute Counter NCALLSI

NCALLSO NOVERFLOWI NOVERFLOWO NDEV

NSCAN NTRALACCI NTRALACCO NANSWERSI NANSWERSO

Description Number of detected seizures (incoming route). The counter is stepped when an accepted seizure is received. Number of detected seizures (outgoing route) Number of calls with congestion (incoming route) Number of calls with congestion (outgoing route) Number of devices in the trunk route (devices in pre or post service state are excluded) Number of accumulations Accumulated traffic level (incoming route) Accumulated traffic level (outgoing route) Number B-answers in the incoming route Number B-answers in the outgoing route

Trunk Route Continue • Trunk utilization • Call Attempt • ASR Sample of the Formula

C7SL1 Counter NSIFTR NSIFSRE NMSUTR NMSURE Counter UNAVAILDUR ASLDUR

Description Number of SIF and SIO octets transmitted Number of SIF and SIO octets received Number of MSUs transmitted Number of MSUs received Description Duration of SL unavailability (all reasons) in seconds Duration of link In-Service state in seconds

C7SL1…Continue • Signalling link utilization • C7 availability

Formula PI Link-avail_ETSI = ASLDUR / (ASLDUR+UNAVAILDUR) * 100%

UPDLOCAT Counter NLOCOLDTOT

Description Total nr. of location updating attempts for already registered subscribers over A-interface and Iu-interface

NLOCNRGTOT

Total nr. of location updating attempts from nonregistered 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 nonregistered subscribers (IMSI attach, normal location updating, or periodic updating) over Gs-Interface

NLOCNRG2SUCC

Number of successful location updatings for nonregistered 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

UPDLOCAT…Continue • LOCATION UPDATE performance Formula

NBRMSCLST • Object type for Handover InterMSC performance Counter NNBRHBANTOT

Description 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.

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

LOSSROUTE • Last but not the least, LOSSROUTE will shown all the Route that used for IN, Interrogation, and Announcement

EOS • Is the Statistic for End Of Selection • Related to the ISUP release Cause. • Useful for troubleshooting in the operation

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

PM Counter in MGW • • • • • •

MediaStream Channel utilization rate TDM termination Group Processor Load MTP2 Signalling Usage AAL2 Traffic per VC AAL2 Pipe utilization

Business Object

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 MMGw. Media stream channel utilization rate (in %) = (MgwApplication.pmNrOfMediaStreamChannelsBusy / MgwApplication.maxNrOfLicMediaStreamChannels) * 100

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

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 • Formula The average processor load of a board (in %) = PlugInUnit.pmProcessorLoad

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

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)

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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