Cognitive Radio Concept

Cognitive radio (CR) is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. This alteration of parameters is based on the active monitoring of several factors in the external and internal radio environment, such as radio frequency spectrum, user behaviour and network state.


From picture shows idea for cognitive radio concept ,"Spectrum Hole" can be use by the good management.