Patent ID: 7313116

Claim:
A method of measuring a strength of a signal received from a second Node B for a measuring time in which communication is not conducted with a first Node B, verifying an identification of the second Node B, and reporting the signal strength measurement and the verified second Node B identification to the first Node B in a user equipment (UE) that moves from the first Node B to a handover zone between the first and second Node Bs in a mobile communication system, the first and second Node Bs servicing in different communication schemes, the method comprising the steps of: (1) receiving a measurement control message from the first Node B, the measurement control message requesting the UE to measure the strength of the signal received from the second Node B, verify the identification of the second Node B, and report the signal strength measurement and the verified second Node B identification; (2) measuring the strength of the signal received from the second Node B for a measuring time and verifying the identification of the second Node B, if the signal strength is equal to or greater than a predetermined threshold; (3) reporting the signal strength measurement and the verified second Node B identification to the first Node B if the UE successfully verifies the identification of the second Node B; (4) reporting only the signal strength measurement to the first Node B if the UE fails to verify the identification of the second Node B; and (5) assigning the UE new downlink and uplink time slots from the first Node B to adjust the measuring time.