Patent ID: 8040866

Claim:
A CDMA (Code Division Multiple Access)-based mobile terminal comprising: a received signal processing unit for measuring the reception quality of a common pilot channel in a received signal; a notified information, processing unit for extracting power information related to transmission power of a common control channel from report information notified from a base station; a signal analyzer unit for calculating the reception quality of the common control channel and the interference signal level of the common control channel based on the reception quality of the common pilot channel and the power information of the common control channel; a quality information storage unit for storing the calculated reception quality of the common control channel and the interference signal level of the common control channel as reception unavailability information when reception fails on the common control channel; a connectivity determination unit for determining whether or not a connection can be made to the network based on the reception unavailability information; and a changing unit for requesting the network to change a frequency of the common control channel or a communication system during a waiting state or upon start of call control when said connectivity determination unit determines that a connection cannot be made.