Cognitive femtocell network: Various challenges and security issues

Witnessing the continuous increase in the wireless data, it has become a challenge to foster this growth of need for spectrum. Hence the concept of reuse comes into picture. This paper will focus on reusing the frequency in a macrocell and utilizing it for femtocell. Femtocell is a smaller base station (BS) with limited subscribers. Its typical power consumption is much less than that needed in macrocel BS (typically in watts). Due to this the user's battery lasts longer when connected to femtocell i.e. when indoors where the data requirement is high. As the paper progresses, typical challenges in femtocell and mitigation of interference to primary users will be discussed. Spectrum sensing and mobility are the crucial aspects which will discussed in cognitive femtocell network. Also the paper will focus on the upper layer issues like the transport layer. The paper will be concluded with the security aspect of cognitive femtocell network as security plays a vital role in wireless technology.