Relay Selection and Resource Allocation in Cognitive Two-Way Relay Networks Based on Bipartite Matching Algorithm
نویسندگان
چکیده
A new relay selection and resource allocation scheme for cognitive two-way relay networks based on bipartite matching algorithm is proposed in this work. We assume a primarysecondary network such that both primary and secondary users utilize the licensed spectrum, simultaneously. In this scenario, some of cognitive radio (CR) nodes are selected by matching algorithm as relays to provide a bidirectional relaying scheme for primary transmission. In the first step of the proposed scenario, a power updating algorithm is used to give the maximum signal-to-interference-plus-noise ratio (SINR) in the CR nodes, while keeping the minimum SINR level at the primary transceivers. Then, in the second step, Hungarian algorithm is used for channel selection in order to maximize the SINR of the CR nodes. Simulation results show that the proposed algorithm improves the throughputs of both primary and secondary networks in comparison with conventional power allocation and relay selection schemes. Copyright © 2012 Praise Worthy Prize S.r.l. All rights reserved.
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