CSFB Success Rate Based Handover (LTE to GSM)

Description

The CSFB Success Rate Based Handover (LTE to GSM) KPI indicates the success rate of handover-based LTE-to-GSM CSFB.
The number of handover-based LTE-to-GSM CSFB attempts increases by 1 at point B as shown in Figure 1 after the eNodeB sends a Mobility From EUTRA Command message to the UE and performs CSFB to a GSM network. The number of successful handover-based LTE-to-GSM CSFB executions increases by 1 at point C, where the eNodeB receives a UE CONTEXT RELEASE COMMAND message from the MME after the UE successfully accesses the GSM network.

Definition

The CSFB Success Rate Based Handover (LTE to GSM) KPI is defined in Table 1. The number of handover-based LTE-to-GSM CSFB attempts and the number of successful handover-based LTE-to-GSM CSFB executions are collected as described in Description.

Table 1 CSFB Success Rate Based Handover (LTE to GSM)

Name	CSFB Success Rate Based Handover (LTE to GSM)
Object	Cell or radio network
Formula	CSFB_L2G_BasedHO_SR = (CSFB_L2G_BasedHO_Success/CSFB_L2G_BasedHO_Attempt) x 100%
Associated Counters	CSFB Success Rate Based Handover(LTE to GSM) = (L.IRATHO.E2G.CSFB.ExecSuccOut/L.IRATHO.E2G.CSFB.ExecAttOut) x 100%
Unit/Range	Percentage (%)