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 Description

NCALLSI Number of detected seizures

(incoming route). The counter is

stepped when an

accepted 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 accumulations

NTRALACCI Accumulated traffic level (incoming

route)

NTRALACCO Accumulated traffic level (outgoing

route)

NANSWERSI Number B-answers in the incoming

route

NANSWERSO Number B-answers in the outgoing

route

Trunk Route Continue

• Trunk utilization

• Call Attempt

• ASR

Sample of the Formula

C7SL1 Counter Description

NSIFTR Number of SIF and SIO octets

transmitted

NSIFSRE Number of SIF and SIO octets

received

NMSUTR Number of MSUs transmitted

NMSURE Number of MSUs received

Counter Description

UNAVAILDUR Duration of SL unavailability (all

reasons) in seconds

ASLDUR 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 Description

NLOCOLDTOT 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

UPDLOCAT…Continue

• LOCATION UPDATE performance

Formula

NBRMSCLST

• Object type for Handover InterMSC performance

Counter Description

NNBRHBANTOT 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 M-MGw.

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)

Thank You

Q and A