Patent ID: 8331256

Claim:
A method of measuring a cell in a wireless communication system, the method comprising: receiving priority information for a plurality of frequencies or Radio Access Technologies (RATs); measuring a frequency or RAT of a serving cell determining its priority; measuring a different frequency or RAT with higher priority than a priority of the frequency or RAT of the serving cell when the priority of the frequency or RAT of the serving cell is not the highest priority; selecting the frequency or RAT of the serving cell based on the result of the measurement; configuring the priority of the frequency or RAT of the serving cell as the highest priority; and suspending the measurement of the different frequency or RAT with the higher priority when a measurement result of the frequency or RAT of the serving cell is higher than a reference value, wherein the frequency or RAT of the serving cell is configured as the highest priority when a measurement result of the different frequency or RAT with higher priority is lower than the reference value and a measurement result of the frequency or RAT of the serving cell is higher than a first threshold.