Patent ID: 8724652

Claim:
A data communication method in a frequency reuse communication system, the method comprising: collecting channel status information for a predetermined frequency band that is licensed or allocated to a primary user by receiving the channel status information from a base station or by measuring the channel status; executing spectrum sensing for the predetermined frequency band to check whether the primary user's traffic exists; retrieving a channel in which the primary user's traffic is not present based upon the spectrum sensing; deciding a length of a frame of data to be transmitted in consideration of interference to the primary user based upon the collected channel status information; transmitting the data based upon the decided frame length through the retrieved channel; and re-executing the spectrum sensing for the channel, if data to be additionally transmitted exists, and checking whether the primary user's traffic exists, wherein the channel status information comprises data traffic information of the primary user, and wherein the data traffic information of the primary user is based upon a uniform distribution, and the data traffic information of the primary user comprises a maximum idle period of the data traffic.