A call admission control method and a mobile station device for a CDMA
mobile communication system which is capable of not damaging a
communication quality of a mobile station in communication even under a
situation of large traffic, suppressing a possibility for degrading a
communication qualities of mobile stations in communication with
surrounding base stations sufficiently low, and improving efficiency
without increasing the control signal traffic. A radio base station device
measures an uplink interference amount and broadcasts it to a mobile
station, and the mobile station acquires the uplink interference amount
that is broadcast from the base station, calculates a required receiving
level at the base station that is expected in a case where it is admitted
to a connection target base station according to said acquired uplink
interference amount, and judges that admission of the mobile station is
refused in a case where it is judged that a prescribed communication
quality cannot be satisfied according this calculated required receiving
level and the uplink interference amount.
