16. The apparatus of claim 12 , wherein at least one ranking criterion of the common ranking criteria comprises a plurality of ranking keys that are combined into a single ranking value.
16. The apparatus of claim 12 , wherein at least one ranking criterion of the common ranking criteria comprises a plurality of ranking keys that are combined into a single ranking value. 19. The method of claim 16 , further comprising causing, at least in part, updating to the plurality of ranking keys in response to an over-the-air update of the apparatus.