Patent ID: 8086252

Claim:
A method for locating a desired mobile terminal in a multicell radio system having a plurality of radio base stations, comprising: sending a plurality of request messages to the plurality of radio base stations to determine a first radio base station of the plurality of radio base stations that is associated with the desired mobile terminal; sending a command message to the first radio base station to switch the desired mobile terminal from an inactive state to an active state, the desired mobile terminal and the first radio base station being set to a first radio channel; the desired mobile terminal receiving the command message and switching from the inactive state to the active state, when the desired mobile terminal is in the inactive state, the desired mobile terminal not transmitting and only activating a receiver of the desired mobile terminal for a first predetermined amount of time in a predetermined time span, the predetermined time span being greater than the first predetermined amount of time, when the desired mobile terminal is in the active state, the desired mobile terminal having the receiver active continuously for a second predetermined amount of time to receive data from the first radio base station, the second predetermined amount of time being defined in the command message; determining whether the plurality of radio base stations are transmitting high priority data; switching at least one radio base station of the plurality of radio base stations to the first radio channel if the at least one radio base station is not transmitting high priority data; the first radio base station transmitting at least one test data message to the desired mobile terminal; the desired mobile terminal transmitting a response message to the first radio base station in response to the at least one test data message, the response message having a field strength; measuring the field strength of the transmitted response message; and determining a location of the desired mobile terminal.