Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

Reply To: Nokia SDCCH Drop Rate due to Abis

#67251
Alonewolves
Guest

hello caki,

i will feedback your problem with my limited knowledge on radio part.

Phantom or Ghost RACH result T3101 expiry ,
then it triggers abis_fail_call and increase this counter by 1,

here is the formula you mentioned.

sum(a.sdcch_radio_fail
+ a.sdcch_rf_old_ho
+ a.sdcch_user_act
+ a.sdcch_bcsu_reset
+ a.sdcch_netw_act
+ a.sdcch_abis_fail_call
+ a.sdcch_abis_fail_old
+ a.sdcch_bts_fail
+ a.sdcch_lapd_fail
+ a.sdcch_a_if_fail_call
+ a.sdcch_a_if_fail_old
– b. T3101_EXPIRED)
100 * ——————————–
sum(sdcch_assign+sdcch_ho_seiz)

a = RBS_PS_TRAFFIC_{OBJ_AGG}_{TIME_AGG}
b = RBS_PS_SERVICE_{OBJ_AGG}_{TIME_AGG}

according to SDR_4 formula, Ghost & Phantom impact already subtracted.

in our network just i have check , majority of sectors have sdr_4 rate below %2 , but a few sectors has more than %10,

by the way, i think you are able to apply your formula and track your KPI using builging Report module in Netact.

Pls correct me if i am wrong, bcs i am new in radio part.