4G LTE KEY PERFORMANCE INDICATORS

Key performance indicators of KPI’s are indicators for if a device or equipment meets a certain relaibility criteria for being ready for deployment.

The KPI’s defined are:

1.    Accessibility

2.    Retainability

3.    Integrity

4.    Availability

5.    Mobility

Business level requirements: if an end user cannot access a service it is hard to charge for the service. Also, if it happens often that an end user cannot access the provided service, the end user might change wireless subscription provider i.e loss of income for the network operator.

Specification level requirements : the accessibility of an end-user application covers a wider area than just the UTRAN part. Hence it is important to realize that a KPI for this in E-UTRAN shall be limited to the parts that E-UTRAN has control of i.e the UTRAN KPI shall be defined so that it indicates the EUTRAN contribution to the end user impact.

There are certain tests to access the accessibilty KPI:

1.    RRC connection set up for registration success rates

2.    RRC connection set up for services success rates

3.    Initial E-RAB setup success rates

4.    Successive E-RAB setup success rates

5.    Call (VOIP) setup success rates

User case description : in providing end-user services to eireless end users , the first step is to get access to the wireless service. First after access to the service has beeb performed , the service can be used. If an accessibility measurement is not considered Ok,then the network operator can investigate which steps that are required to improve the accessibilty towards their customers.