On Secondary User Transmission Schemes in Relay-Assisted Cognitive Radio Networks
2013 (English)In: 2013 IEEE 77th Vehicular Technology Conference (VTC Spring), IEEE , 2013, 6692665- p.Conference paper (Refereed)
We consider a cooperative cognitive radio network with one primary user and many secondary users. In each transmission frame, one secondary user is selected to act as a relay for the primary user and also transmits its own data. Three different schemes for the secondary user's transmission is studied, namely, time-splitting, superposition coding, and a combined scheme that takes advantages of both time-splitting and superposition coding schemes. We formulate the relay selection problem for each scheme with the objective of maximizing the secondary user's data rate while satisfying a pre-defined gain threshold for the primary user. This constraint provides an incentive for the primary user when allowing the secondary user access its licensed band. We obtain the optimal solution for this problem in each scheme, on which the relay selection is based on. Finally, we compare the performance of different schemes using Monte-Carlo simulations.
Place, publisher, year, edition, pages
IEEE , 2013. 6692665- p.
, IEEE Vehicular Technology Conference Proceedings, ISSN 1550-2252
Cognitive radio network, Combined schemes, Cooperative Cognitive Radio Networks, Monte-Carlo simulations, Optimal solutions, Super-position coding, Transmission frames, Transmission schemes
IdentifiersURN: urn:nbn:se:kth:diva-116589DOI: 10.1109/VTCSpring.2013.6692665ISI: 000331081500288ScopusID: 2-s2.0-84893523068ISBN: 978-1-4673-6337-2OAI: oai:DiVA.org:kth-116589DiVA: diva2:596201
2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013; Dresden; Germany; 2 June 2013 through 5 June 2013
ProjectsMobile and wireless communications Enablers for Twenty-twenty (2020) Information Society (METIS)
FunderEU, FP7, Seventh Framework Programme
QC 201403122013-01-212013-01-212014-05-09Bibliographically approved