Cognitive Radio – Adaptive, Intelligent and Network technology A review

Cognitive radio CR is a software Defined Radio (SDR) that consequently distinguishes the encompassing RF, impetuses and cleverly obliges its working parameters to the framework of system and changes it conduct as needs be. In this article we proposed a new integration approach to sensor nodes with cognitive radio (CR) nodes to route sensor data to sink using licensed channels opportunistically. In many investigations the researches found inefficient utilizations of spectrum. To solve it cognitive radio network is introduced in order to access the dynamic spectrum. The spectrum sensing issue is one of the most challenging problem in CR systems to get in information of the available frequency bands. In this paper we will study various researches which have been carried out for efficient spectrum management such as spectrum sensing, dynamic spectrum access, channel access and allocation. Moreover, energy harvesting, resource management and energy aware routing schemes are also presented.