Patent ID: 8116211

Claim:
A test method of confirming problem detection means in a radio link state in a mobile station, comprising: a first step of determining whether or not the mobile station detects the problem in a radio link state based on whether or not the mobile station transmits an uplink signal, when a radio quality is changed from a first state where the radio quality is equal to or more than a first threshold value to a second state where the radio quality is equal to or less than the first threshold value; and a second step of determining whether or not the mobile station does not detect the problem in a radio link state based on whether or not the mobile station transmits an uplink signal, when the radio quality is changed to a third state where the radio quality is equal to more than a second threshold value, after a lapse of a first time interval from a time point at which the radio quality is changed from the first state to the second state.