A Study: On Routing Schemes in Cognitive Radio Network

Abstract: Cognitive Radio (CR) technology is used to solve the spectrum scarcity problem in wireless networks, by using the existing wireless spectrum when they are not in use. CR technology allows sharing of licensed spectrum band in opportunistic and non interfering manner. However it should be aware of spectrum availability and Primary User (PU) activities. Routing and spectrum management are the main challenges in Cognitive Radio Network.. The main idea behind this concept is to use an appropriate routing protocol for cognitive network which becomes a major necessity now days. As the available radio frequency for wireless communication gets lesser day by day because of licensing, so we need to have some way to use these frequencies in a more efficient manner. Routing is a fundamental issue to consider when dealing with cognitive radio networks. Geographical concepts like location server is also challenging task to improve the routing problem .Here we focused on the potential routing approaches that can be employed in adaptive wireless networks.

KEYWORDS Cognitive Radio Network , Spectrum Hole, Spectrum Sensing, Spectrum Sharing, Routing, Location server .