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Vol. 160, Issue 12, December 2013, pp. 244-249




Availability-Aware Resource Allocation Strategy for Heterogeneous Cognitive Radio Networks
Hang QIN, Yangrong CUI, Youfu DU

Computer School, Yangtze University, Jingzhou 434023, China
E-mail: Qinhang@ukr.net


Received: 14 October 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems


Abstract: This paper addresses high availability for resource allocation, which might be found in cognitive radio networks so as to optimize network performance. Two resource allocation strategies, the High Available Spectrum Allocation (HASA) and the Optimized Heterogeneous Convergence (OHC), are developed by establishing and numerically solving two optimization multicast applications. The HASA is to minimize the required network-wide resource for scheduling and routing jointly via availability constraints, while the OHC strategy does not degrade response time for network convergence over heterogeneous wireless environment. The effectiveness of both strategies is demonstrated through theoretical analysis. These strategies are also evaluated through extensive experimental studies and the results show that when compared with traditional strategies, the proposed spectrum allocation schemes significantly improve the performance of spectrum scheduling in multicast applications, both in terms of the discovery time and the achieved ratio.


Keywords: Cognitive radio networks, High availability, Heterogeneity, Scheduling, Dynamic spectrum access.


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