Hi Jaspreet
BMA defines how many SACCH multiframes are used in measurement averaging in the BTS.The preprocessing of the measurement results in the BTS
reduces the traffic load of the LAPD links and BCSU units.
HYS defines the received RF power level hysteresis for required cell reselection.Higher the HYS ,less frequent will be cell reselection,and lesser the SDCCH usage for Location update.