The front-to-back ratio is an important indicator to characterize the antenna index. For the donor antenna, the larger the front-to-back ratio, the better.
Location update includes three types of normal location update (ie, location update across location area), periodic location update (corresponding to T3212 timeout), and IMSI attachment (corresponding to user boot).
In order to avoid the blocking of the SDCCH caused by excessive cell reselection across the LAC, we increase the ___ parameter of the neighboring cell that has a handover relationship with the cell and is different from the LAC.