METHOD FOR CONTROLLING INTER-FREQUENCY HAND-OFF IN A COGNITIVE RADIO BASED CELLULAR RELAY COMMUNICATION CAPABLE OF REDUCING INTERFERENCE BETWEEN CHANNELS

摘要

PURPOSE: A method for controlling inter-frequency hand-off in a cognitive radio based cellular relay communication is provided to perform hand-off using an empty channel based on CR(Cognitive Radio) technology. CONSTITUTION: A BS(Base Station)(30) calculates RS(Relay Station)-process rate and BS-process rate using RS-signal strength, BS-signal strength, and empty channel state information within CR band information(S300). If the RS-process rate is higher than the BS-process rate, the BS makes a handoff order to an MS(Mobile Station)(10).