HOW DO YOU ANALYSIS HIGH CALL DROP.

[kkagimu]

Dear Team
I would like help on the KPIS to use when analysising sites with high call drop? What is the cause of drops due to utran generated reasons.

[rapdoc]

Hello,

in first check the System file for your site, this step permit you to check if you have a HW problem, after check RB blocking and RRC request and causes maybe it is a capacity problem check the CPU of cards
....

BR

[kkagimu]

thanks for that advice. how do you check the system files? which counters can be used for the analysis.

[rffreeconsult]

Utran-generated reasons can be the issues: 1- Core Network 2- ATM/Iub interface 3- Hardware (TX/ RAX boards)

Check if u have any hardware malfunctions issues and afterward, advance to the number of boards (RAX) first and next Transmission boards. Remember the n# RAX boards affect your CE count and if you don't have enough CE, your call can be released although RF conditions (Coverage & interference) are good, CQI is correct for HSPA data calls.