Enhanced Power Allocation and Relay Selection Scheme in Two-Way Relaying Cognitive Radio Networks

Abstract

This paper addresses the enhanced power allocation (PA) and relay selection scheme (RS) in two-way relaying cognitive radio networks consisting of multiple user-pairs and multiple relays. In order to reduce the computational complexity for practical scenario, we propose a branch and bound based (BnB-based) power allocation and relay selection scheme and a greedy power allocation and relay selection scheme to maximize the system throughput. Simulation results show that the proposed BnB-based PA and RS scheme can achieve better tradeoff of system throughput and complexity.