Ericsson KPI Formula

KPI	Target	FORMULAE - ERICSSON
Random Access Success Rate %	>=98	100 * CNROCNT / (CNROCNT + RAACCFA)
SDCCH Blocking %	<=0.5	100 * CCONGS / CCALLS
SDCCH Drop %	<=1.2	100 * (CNDROP - CNRELCONG) / CMESTAB
TCH Blocking %	<=1	100 * (CNRELCONG + TFNRELCONG + THNRELCONG) / TASSALL
TCH Time Congestion/Cell	<=50 sec	Cells with Full Rate only: 100 * TFTCONGS / (PERLEN*60) Cells with Half Rate: 100 * THTCONGS / (PERLEN*60)
TCH Assignment Success Rate %	>=97	100 * TCASSALL / TASSALL
TCH Drop %	<=2	100 * TNDROP / TCASSALL
Handover Success Rate %	>=95	100 * HOVERSUC / HOVERCNT
Avg SDCCH Congestion/cell	<=50 sec	100 * CTCONGS / (PERLEN*60)
Avg TCH Congestion/cell	<=200 sec	Cells with Full Rate only: 100 * TFTCONGS / (PERLEN*60) Cells with Half Rate: 100 * THTCONGS / (PERLEN*60)
Network Availability (Radio)%	>=99.90	100 * (No of days * 24 * 60 * Total No of Cells – Summation of Downtime in minutes of Cells) / (No of days * 24 * 60 * Total No of Cells)
SDCCH Congestion <=30 sec	>90	100 * CTCONGS / (PERLEN*60)
% of cells having SQI samples between 16-30 >90%	>90	90% of cells having percentage of Good samples>90%
Peak Processor Load (MSCs/BSCs) %	<=80	ACCLOAD/NSCAN (These counters are available in object type LOAS)
Switch BHCA Utilization (during Switch NBH)	<=80	100*( BHCA/SwitchBHCA Capacity)
Paging Success Rate (24 hrs) %	>=90	100 * (NLAPAG1RESUCC + NLAPAG2RESUCC) / NLAPAG1TOT
Location Update Success Rate (24 hrs) %	>=95	100 * NLALOCSUCC / NLALOCTOT
Successful Call Rate (24 Hrs) %	>=95	(NBANS + NABEFA1 + NABEFA2 + NCAWNOA + NTOBEFA + NBOUT + NBBUSY) / NCALLS
Network Availability (Switch/IN)%	>99.99	100 * (No of days * 24 * 60 * Total No of Nodes – Summation of Downtime in minutes of Nodes) / (No of days * 24 * 60 * Total No of Nodes)
Core Network Availability %	>99.99	100 * (No of days * 24 * 60 * Total No of Nodes – Summation of Downtime in minutes of Nodes) / (No of days * 24 * 60 * Total No of Nodes)
Attach Success Rate excluding Unregistered Subs. %	>=99	100 * [1 - ((gprsMmSgsnUnsuccAttReq - gprsMmSgsnUnsuccAttReqCC7/8/14) / gprsMmSgsnAttReq)]
PDP context activation success rate (Only NW Cause codes) %	>=99	100 * gprsSmSgsnSuccActivations / (gprsSmSgsnSuccActivations + gprsSmSgsnUnsuccActivations)
Round trip time	<=700 ms	Ping either a DNS server or an external Internet server by the MS PING SIZE - 32BYTE
Average UL throughput per TBF	>=20 kbps	ULBGEGTHR / ULBGEGDATA
Average DL throughput per TBF	>=45 kbps	DLBGEGTHR / DLBGEGDATA