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

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

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

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

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

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.

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

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

GCP statistic

• The GCP Link Uptime measurement shows the

time in seconds the GCP link has been in

operation.

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