The present document specifies the requirements applicable to Performance Management (PM) of mobile networks that include virtualized network functions which can be part of EPC or IMS.
The evaluation of PLMN-system behaviour will require performance data collected and recorded by VNF(s) according
to a schedule established by the EM. However, not all of these measurements will be required all the time, or from
every VNF. Therefore, it is necessary to administer the measurements so as to determine which measurement types, on
which measured resources, at which times, are to be executed (see TS 32.401
The essence of NFV is to migrate the execution of network functions from vertically integrated hardware to the industry
standard COTS (commercial of-the-shelf) servers in the data centre. Performance measurements that are independent of
the migration (e.g. handover, tracking area update related measurements) are not impacted. Therefore, these
performance measurements can be reused.
Other performance measurement that are to measure the hardware usages (e.g. MME Processor usage [TS 32.426
]) are impacted
by the Virtualized Resource (VR) performance measurements.
full Table of Contents for TS 28.520 Word version: 15.0.0