Efficient spectrum sensing method and procedure in cognitive radio environment

The invention that is composed of detection procedures at the time of detection procedures and idle time (Quiet Time) when the terminal is initialized to its features. The terminal is primarily determined whether or not the cognitive radio decodes the signal input to the current channel technology signal to reduce the detection time for carrying out the detection over the entire band of the detection process is to detect when the initial attempt to access the base station the step of determining whether the terminal is a signal which is the signal of the base station and the this selection at a frequency that can be a base station and the communication or the signal from the cognitive radio technology is empty that the signal first user occupying the channel which can be connected repeatedly it features a method for detecting the total frequency band. Rest period (Quiet Time) when there is the first judge the user whether to use the channel groups that are currently in use by cognitive radio system, at the end of this process, although not used in cognitive radio systems for future use first in the candidate frequency bands and the step of determining whether the user with its features. Cognitive Radio, Spectrum Sensing, Terminal initialize, Quiet Time