Allocation of Spectrum using ADCSO for Collision Avoidance and Cooperative Spectrum Sensing with MIMO

Abstract

This paper investigates the problem of allocation of spectrum for the Secondary Users (SUs) based on Adaptive Dynamic Cat Swarm Optimization (ADCSO) which follows certain priorities that allows SU to access the spectrum without collision and it also details the cooperative spectrum sensing using Multiple Input Multiple Output (MIMO). Cooperative spectrum sensing shares the sensed information obtained using MIMO to the peer SUs which avoids the Hidden Terminal Problem. In Wireless Communication the avoidance of interference and delay are the major issues. In recent times the number of users have been increased that lead to the concern on quality of spectrum to the quantity of spectrum. Hence it is necessary to find the free spectrum from the available spectrum nearby. However, this need may result in collision among the SUs trying to find free spectrum in the Primary User (PU) region. To avoid this, method based on Swarm Intelligence (SI) is used. There can be certain nodes that remain hidden due to the presence of obstacles in between them causing Hidden Terminal Problem. This can be overcome by sharing the sensed information to the peer nodes which acts as a relay node for the communication. Hence, this proposed method collectively solves the above mentioned problems effectively.