I work with BSS Alcatel. We have a serious problem with Immediate Assignment: for 20% of cells it`s ~ 85-90%.The problem connects to counter MC149 – expired T3101 (3 sec), i.e. within 3 sec MS doesn`t acknowledge occupation of SDCCH. We have changed BCCH/BSIC to chek the version with Phantom RACH and BCCH-interference, have changed all equipment in the cell (trxs & ANc) but – without any results 🙁
Do anybody have similar problem?