Nsn 2g Kpi Formula

KPI Call Set-up Failure Rate SDCCH Blocking Rate

Formula 100–((100– SDCCH blocking rate)*(100–SDCCH drop rate)*(100–TCH blocking rate)) 100*(sdcch_busy_att/sdcch_seiz_att)

SDCCH Drop Rate

100*(sdcch_radio_fail+sdcch_rf_old_ho+sdcch_user_act+sdc ch_bcsu_reset+sdcch_netw_act+sdcch_bts_fail+sdcch_lapd_f ail+sdcch_a_if_fail_call_sdcch_a_if_fail_old)/ ((sdcch_assign+sdcch_ho_seiz)– (sdcch_abis_fail_call+sdcch_abis_fail_old))

TCH Blocking Rate

100*((tch_call_req–tch_norm_seiz)– (msc_o_sdcch_tch+bsc_o_sdcch_tch+cell_sdcch_tch) +tch_succ_seiz_for_dir_acc–a_if_crc_mismatch_call_setup)/ (tch_call_req–a_if_crc_mismatch_call_setup)

Drop Call Rate (Current)

100*(tch_radio_fail+tch_rf_old_ho+tch_abis_fail_call+tch_abis _fail_old+tch_a_if_fail_call+tch_a_if_fail_old+tch_tr_fail+tch_tr _fail_old+ tch_lapd_fail+tch_bts_fail+tch_user_act+tch_bcsu_reset+tch_ netw_act+tch_act_fail_call)/(tch_norm_seiz+ (msc_i_sdcch_tch+bsc_i_sdcch_tch+cell_sdcch_tch) +tch_seiz_due_sdcch_con+(msc_i_tch_tch+bsc_i_tch_tch)– (msc_o_tch_tch+bsc_o_tch_tch))

Drop Call Rate (New)

100* (drop_after_tch_assign –tch_re_est_release) / (ms_tch_succ_seiz_assign_complt +msc_i_sdcch_tch +bsc_i_sdcch_tch +msc_i_tch_tch +bsc_i_tch_tch – msc_o_tch_tch –bsc_o_tch_tch)

HO Failure Rate

100*((msc_o_tch_tch_at+msc_o_sdcch_tch_at+msc_o_sdcch _at+bsc_o_tch_tch_at+bsc_o_sdcch_tch_at+bsc_o_sdcch_at +cell_tch_tch_at+cell_sdcch_tch_at+cell_sdcch_at)– (msc_o_succ_ho+bsc_o_succ_ho+cell_succ_ho))/ (msc_o_tch_tch_at+msc_o_sdcch_tch_at+msc_o_sdcch_at+b sc_o_tch_tch_at+bsc_o_sdcch_tch_at+bsc_o_sdcch_at+cell_t ch_tch_at+cell_sdcch_tch_at+cell_sdcch_at)

HO Failure Rate (Blocking Successful) SDCCH Traffic TCH Traffic SDCCH Availability

TCH Availability

100*((msc_o_tch_tch_at+msc_o_sdcch_tch_at+msc_o_sdcch _at+bsc_o_tch_tch_at+bsc_o_sdcch_tch_at+bsc_o_sdcch_at +cell_tch_tch_at+cell_sdcch_tch_at+cell_sdcch_at)– (msc_o_succ_ho+bsc_o_succ_ho+cell_succ_ho)– (msc_o_fail_lack+bsc_o_fail_lack+cell_fail_lack))/ (msc_o_tch_tch_at+msc_o_sdcch_tch_at+msc_o_sdcch_at+b sc_o_tch_tch_at+bsc_o_sdcch_tch_at+bsc_o_sdcch_at+cell_t ch_tch_at+cell_sdcch_tch_at+cell_sdcch_at) (ave_busy_sdcch/res_av_denom15) (ave_busy_tch/res_av_denom14) 100*(ave_sdcch_sub/res_av_denom3)/ ((ave_sdcch_sub/res_av_denom3)+ave_non_avail_sdcch) 100*((ave_avail_tch_sum/ave_avail_tch_den)+ (ave_GPRS_channels_sum/ave_GPRS_channels_den))/ ((ave_avail_tch_sum/ave_avail_tch_den)+ (ave_gprs_channels_sum/ave_gprs_channels_den) +ave_non_avail_TCH)