Network selection strategy for cognitive radios with heterogeneous primary networks

Dynamic spectrum sharing is a promising approach to reusing the underutilized radio spectrum in a cognitive radio system (CRS). Potential available spectrum for CRS can be from multiple primary radio systems (PRSs) with different spectrum prices, and secondary users (SUs) with heterogenous usage modes, interference punishments and service types. Choosing which primary network to access for SU brings the network selection problem. This scenario generates new opportunities for CRS to improve the system performance by exploiting heterogenous characteristics of PRSs. In this paper, we first use continuous time Markov chain (CTMC) model to describe the network selection problem and derive the performance metrics. Then we intuitively propose Random and Greedy network selection strategies under this framework. Motivated by the drawbacks of those strategies, we categorize the service types of SU into Real-Time Services (RTS) and Non-Real-Time Services (NRTS) and propose an optimal network selection algorithm to maximize performance metrics based on policy iterations. Lastly, the performance of the proposed designs is compared and evaluated through simulation and numerical results.

[1]  John M. Chapin,et al.  COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - The Path to Market Success for Dynamic Spectrum Access Technology , 2007, IEEE Communications Magazine.

[2]  H. Vincent Poor,et al.  Toward efficient radio spectrum utilization: user cooperation in cognitive radio networking , 2012, IEEE Network.

[3]  Venugopal V. Veeravalli,et al.  Dynamic spectrum access policies for cognitive radio , 2008, 2008 47th IEEE Conference on Decision and Control.

[4]  H. Vincent Poor,et al.  Cooperative cognitive radio networking using quadrature signaling , 2012, 2012 Proceedings IEEE INFOCOM.

[5]  Rittwik Jana,et al.  Network selection for secondary users in cognitive radio systems , 2011, 2011 Proceedings IEEE INFOCOM.

[6]  P.K. Tang,et al.  Performance of Secondary Radios in Spectrum Sharing with Prioritized Primary Access , 2006, MILCOM 2006 - 2006 IEEE Military Communications conference.

[7]  S. Anand,et al.  On Network Selection for Secondary Users in Cognitive Radio Networks , 2007 .

[8]  Wei Song,et al.  Performance Analysis of Cognitive Radio Spectrum Access with Prioritized Traffic , 2011, 2011 IEEE International Conference on Communications (ICC).

[9]  Alexander M. Wyglinski.  Cognitive radio communications and networks [guest editorial] , 2008, IEEE Communications Magazine.

[10]  Friedrich Jondral,et al.  Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency , 2004, IEEE Communications Magazine.

[11]  Yong Huat Chew,et al.  On the Modeling and Performance of Three Opportunistic Spectrum Access Schemes , 2010, IEEE Transactions on Vehicular Technology.

[12]  Michael J. Neely,et al.  Opportunistic Scheduling with Reliability Guarantees in Cognitive Radio Networks , 2008, IEEE INFOCOM 2008 - The 27th Conference on Computer Communications.