Abstract: The present invention generally relates to devices and methods, in a cellular network, for measuring a power level for each one of a plurality of BCCH carriers emitted by neighbouring cells around a Mobile Set, in: dividing the plurality of carriers into at least a first group and a second group; handling measurements of the power level of each carrier included in the first group, so as the time lapsed between two consecutive measurements for each carrier is lesser than a first threshold; handling measurements of the power level of each carrier included in the second group, so as the time lapsed between two consecutive measurements for each carrier is lesser than a second threshold different from the first threshold.