Patent ID: 7024191

Claim:
A mobile station apparatus for detecting a carrier containing information necessary for a base station apparatus employing a CDMA scheme to shift to an in-zone standby state, said mobile station apparatus comprising: a measuring means for measuring received power of a received frequency fm i (1≦i≦I), wherein i is the frequency number of the received frequency and I is the total number of frequencies; a limiting means for limiting a frequency range within which said carrier is to be sought to a limited frequency range containing a frequency fm j (1≦j≦I, wherein j is the frequency number) having a measured received power that is greater than a predetermined value, and there is a frequency, J (J<I), within the limited frequency range; a control means for choosing a number of K frequencies (K<J) in said limited frequency range as candidates for said carrier; and a search means for carrying out a cell search for a number of K frequencies chosen as said candidates so as to detect said carrier.