Optimizing Spectrum Sharing in Wireless Mesh Network Using Cognitive Technology

Abstract

In cognitive wireless networks, spectrum owners (primary users, PUs) may lease the unused spectrum to unlicensed users (secondary users, SUs). This spectrum is used to establish a secondary network that serves real time connections. The size of leased spectrum influences both the admitted traffic of SUs and the cost of spectrum. For this spectrum market, we present unsupervised learning paradigm as a means for extracting the optimal control policy for spectrum trading. This policy gives spectrum owner the opportunity to maximize its profit by adapting network resources to the changes in the network status and the market conditions. To meet different requirements, the problem is formulated as reward maximization with penalty for delay. The numerical results show that the proposed machine learning method is able to find an efficient trade-off between profit loss, and average delay for SUs.

Performance optimisation of cooperative spectrum sensing in mobile cognitive radio networks

“…There are three types of CR paradigms: interweave, underlay, and overlay. From the viewpoint of spectrum market [1][2][3][4][5], the paradigm of spectrum trading is considered where the primary user (PU) aims at efficiently sharing spectrum with secondary users (SUs) using underlay and overlay. Interweave is currently the most commonly used CR paradigm.…”