Key Performance Indicators

Ericsson Service-Aware Policy Controller

1	Introduction
1.1	Scope
2	Traffic Key Performance Indicators
2.1	Gx CCR Failure Ratio
2.2	Gx CCR Establishment Failure Ratio
2.3	Gx CCR Failure owing to Congestion Ratio
2.4	Gx CCR Failure owing to Unable to Comply Ratio
2.5	Gx CCR Failure owing to Unknown Session Ratio
2.6	Gx CCR Failure owing to Authorization Rejected
2.7	Gx CCR Failure owing to Invalid Information Ratio
2.8	Gx RAR Failure Ratio
2.9	Gx RAR Time-out Ratio
2.10	Rx AAR/STR Failure Ratio
2.11	Rx AAR Failure owing to Congestion Ratio
2.12	Rx AAR Failure owing to Unable to Comply Ratio
2.13	Rx AAR Failure owing to Service Not Authorized Ratio
2.14	Rx AAR Failure owing to Invalid Information Ratio
2.15	Rx AAR Failure owing to Unknown Session Ratio
2.16	Rx RAR Failure Ratio
2.17	Rx RAR Time-out Ratio
2.18	Rx ASR Time-out Ratio
2.19	Sy SLR/STR Failure Ratio
2.20	Sy SLR/STR Answered with Error Ratio
2.21	Sy SNR Failure Ratio
2.22	Sy SNR Answered with Error Ratio
2.23	Sy SLR Time-out Ratio
2.24	Sy STR Time-out Ratio
2.25	Smp CCR Failure Ratio
2.26	Smp CCR Establishment Failure Ratio
2.27	Smp CCR Establishment Failure owing to Congestion Ratio
2.28	LDAP search request Failure Ratio
2.29	LDAP modify requests Failure Ratio
2.30	External Database SOAP notification request Failure Ratio
3	Capacity Key Performance Indicators
3.1	CPU Load
3.2	Memory Use
3.3	Subscribers
3.4	IP-CAN Mobile Sessions
3.5	IP-CAN Fixed Sessions
3.6	AF Sessions
3.7	Gx Transactions per Second
3.8	Rx Transactions per Second
3.9	Sy Transactions per Second
3.10	Smp Transactions per Second

1 Introduction

Key Performance Indicators (KPIs) are parameters of the performance of the node or network. They provide the operator with information and indicators of problems found in the node and in surrounding nodes. KPIs are calculated at node level.

KPIs are indicators that have a major impact on the end-user perception of quality. KPIs are used for the following:

Detection of performance issues
Initial troubleshooting
Fault analysis

Since different KPIs are applicable to different protocols, each KPI is marked with the appropriate protocol type.

The equations in the coming sections need be multiplied by 100 to have the formulas in percentage format.

1.1 Scope

This document covers the following issues:

Traffic KPIs
Capacity KPIs

2 Traffic Key Performance Indicators

This section describes the traffic-related KPIs in the SAPC.

2.1 Gx CCR Failure Ratio

The Gx CCR Failure Ratio denotes the proportion of failed attempts to create, update, or terminate a Gx session.

Equation 1 Gx CCR Failure Ratio

2.2 Gx CCR Establishment Failure Ratio

The Gx CCR Establishment Failure Ratio denotes the proportion of failed attempts to establish a Gx session.

Equation 2 Gx CCR Establishment Failure Ratio

2.3 Gx CCR Failure owing to Congestion Ratio

The Gx CCR Failure owing to Congestion Ratio denotes the proportion of failed attempts to create, update, or terminate a Gx session because of congestion in the SAPC. Only Gx CCR-I message are answered with TooBusy in the SAPC.

Equation 3 Gx CCR Failure owing to Congestion Ratio

2.4 Gx CCR Failure owing to Unable to Comply Ratio

The Gx CCR Failure owing to Unable to Comply Ratio denotes the proportion of failed attempts to create, update, or terminate a Gx session because the SAPC is unable to handle the request.

Equation 4 Gx CCR Failure owing to Unable to Comply Ratio

2.5 Gx CCR Failure owing to Unknown Session Ratio

The Gx CCR Failure owing to Unknown Session Ratio denotes the proportion of failed attempts to update or terminate a Gx session because the request belongs to an unknown session.

Equation 5 Gx CCR Failure owing to Unknown Session Ratio

2.6 Gx CCR Failure owing to Authorization Rejected

The Gx CCR Failure owing to Authorization Rejected denotes the proportion of failed attempts to create or update a Gx session because the request authorization was rejected.

Equation 6 Gx CCR Failure owing to Authorization Rejected

2.7 Gx CCR Failure owing to Invalid Information Ratio

The Gx CCR Failure owing to Invalid Information Ratio denotes the proportion of failed attempts to create, update, or terminate a Gx Session because a mandatory Attribute Value Par (AVP) is missing or an AVP has a wrong value in the request.

Equation 7 Gx CCR Failure owing to Invalid Information Ratio

2.8 Gx RAR Failure Ratio

The Gx RAR Failure Ratio denotes the proportion of failed attempts to reauthorize a Gx session.

Equation 8 Gx RAR Failure Ratio

2.9 Gx RAR Time-out Ratio

The Gx RAR Time-out Ratio denotes the proportion of time-outs during reauthorization of a Gx session.

Equation 9 Gx RAR Time-out Ratio

2.10 Rx AAR/STR Failure Ratio

The Rx AAR/STR Failure Ratio denotes the proportion of failed attempts to create, update, or terminate an AF session.

Equation 10 Rx AAR/STR Failure Ratio

2.11 Rx AAR Failure owing to Congestion Ratio

The Rx AAR Failure Ratio owing to Congestion Ratio denotes the proportion of failed attempts to create or update an AF session owing to congestion in the SAPC. Only Rx AAR-I messages are answered with TooBusy.

Equation 11 Rx AAR Failure owing to Congestion Ratio

2.12 Rx AAR Failure owing to Unable to Comply Ratio

The Rx AAR Failure owing to Unable to Comply Ratio denotes the proportion of failed attempts to create or update an AF session because the SAPC is unable to handle the request.

Equation 12 Rx AAR Failure owing to Unable to Comply Ratio

2.13 Rx AAR Failure owing to Service Not Authorized Ratio

The Rx AAR Failure owing to Service Not Authorized Ratio denotes the proportion of failed attempts to create or update an AF session because a service cannot be authorized.

Equation 13 Rx AAR Failure owing to Service Not Authorized Ratio

2.14 Rx AAR Failure owing to Invalid Information Ratio

The Rx AAR Failure owing to Invalid Information Ratio denotes the proportion of failed attempts to create or update an AF session because the request does not contain a mandatory AVP or it contains an AVP with a wrong value.

Equation 14 Rx AAR Failure owing to Invalid Information Ratio

2.15 Rx AAR Failure owing to Unknown Session Ratio

The Rx AAR Failure owing to Unknown Session Ratio denotes the proportion of failed attempts to update an AF session because the SAPC cannot find the session.