Below are the list of some of the VoLTE KPIs formula used in Ericsson.
(Numerals in square bracket represent QCI)
VoLTE_Access_Failure_Rate = 100-(100 * (pmRrcConnEstabSuccMod+pmRrcConnEstabSuccMta+pmRrcConnEstabSuccHpa) / (pmRrcConnEstabAttMod + pmRrcConnEstabAttMta + pmRrcConnEstabAttHpa - pmRrcConnEstabAttReattMod - pmRrcConnEstabAttReattMta - pmRrcConnEstabAttReattHpa - pmRrcConnEstabFailMmeOvlMod) * (pmS1SigConnEstabSuccMod+pmS1SigConnEstabSuccMta+pmS1SigConnEstabSuccHpa) / (pmS1SigConnEstabAttMod+pmS1SigConnEstabAttMta+pmS1SigConnEstabAttHpa) * (pmErabEstabSuccInitQci[1]+ pmErabEstabSuccAddedQci[1]) / (pmErabEstabAttInitQci[1] + pmErabEstabAttAddedQci[1]-pmErabEstabAttAddedHoOngoingQci[1]) * (pmErabEstabSuccInitQci[5] + pmErabEstabSuccAddedQci[5]) / (pmErabEstabAttInitQci[5] + pmErabEstabAttAddedQci[5]-pmErabEstabAttAddedHoOngoingQci[5]))
VoLTE_Drop_Rate = ((pmErabRelAbnormalEnbQci[1] +pmErabRelAbnormalMmeQci[1])/(pmErabRelAbnormalEnbQci[1]+ pmErabRelNormalEnbQci[1]+pmErabRelMmeQci[1]))*100
VoLTE Cell Integrity = 100 * (pmVoipQualityRbUlOk / (DpmVoipQualityRbUlOk + pmVoipQualityRbUlNok))
VoLTE_Erlang = pmErabQciLevSum[1] / 720
VoLTESuccCalls = pmErabEstabSuccInitQci[1] + pmErabEstabSuccAddedQci[1]
VoLTEQCI1AddSuccRate = 100 * (pmErabEstabSuccAddedQci[1]/(pmErabEstabAttAddedQci[1]-pmErabEstabAttAddedHoOngoingQci[1]))
VoLTEQCI1InitSuccRate = 100 * (pmErabEstabSuccInitQci[1]/pmErabEstabAttInitQci[1])
VoLTEQCI5AddSuccRate = 100 * (pmErabEstabSuccAddedQci[5]/(pmErabEstabAttAddedQci[5]-pmErabEstabAttAddedHoOngoingQci[5]))
VoLTEQCI5InitSuccRate = 100 * (pmErabEstabSuccInitQci[5]/pmErabEstabAttInitQci[5])
Pdcch ErrorRate Volte = 100*((pmDlAssigsTransVolte + pmUlGrantsTransVolte - pmUlGrantsTransVolteNoAck - pmDlAssigsWithDetectedHarqAckVolte - pmUlGrantsWithDetectedPuschVolte) / (pmDlAssigsTransVolte + pmUlGrantsTransVolte - pmUlGrantsTransVolteNoAck ))
VoLTE_Mobility_SR = pmHoExeOutSuccQci[1] / pmHoExeOutAttQci[1]
VoLTE_Drops_Count = pmErabRelAbnormalEnbActQci[1]+pmErabRelAbnormalMmeActQci[1]