Channel Availability for Mobile Cognitive Radio Networks

• Main Authors: Cacciapuoti, Angela Sara, Caleffi, Marcello, Paura, Luigi, Rahman, Md. Arafatur
• Format: Article
• Published: Elsevier 2015
• Subjects: QA76 Computer software
• Online Access: http://umpir.ump.edu.my/id/eprint/7441/; http://dx.doi.org/10.1016/j.jnca.2014.10.002
• Institution: Universiti Malaysia Pahang Al-Sultan Abdullah

Channel availability is defined as the probability of a licensed channel being available for the communications of unlicensed users. Channel availability is a key parameter for an effective design of channel selection strategies as well as routing metrics in cognitive radio networks. In static scenarios, the availability of a channel depends only on the primary user’s activity. Differently, in mobile scenarios, the availability of a channel dynamically varies in time due to the changes of the users’ relative positions. In this paper, we design a channel-availability estimation strategy by explicitly accounting for the features of mobile scenarios. The simulation results reveal the benefits of adopting the proposed strategy in cognitive radio networks.