Download Cooperative Cognitive Radio Networking: System Model, by Bin Cao, Qinyu Zhang, Jon W. Mark PDF

By Bin Cao, Qinyu Zhang, Jon W. Mark

This SpringerBrief examines the lively cooperation among clients of Cooperative Cognitive Radio Networking (CCRN), exploring the approach version, permitting strategies, and performance.

The short presents a scientific learn on lively cooperation among fundamental clients and secondary clients, i.e., (CCRN), through the discussions on learn matters and demanding situations in designing spectrum-energy effective CCRN. As an attempt to make clear the layout of spectrum-energy effective CCRN, they version the CCRN in accordance with orthogonal modulation and orthogonally dual-polarized antenna (ODPA). The source allocation concerns are unique with admire to either versions, by way of challenge formula, resolution method, and numerical effects. eventually, the optimum communique techniques for either basic and secondary clients to accomplish spectrum-energy effective CCRN are analyzed.

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Extra resources for Cooperative Cognitive Radio Networking: System Model, Enabling Techniques, and Performance

Example text

Within these enforcing policies, only licensed users, referred to as primary users (PUs), can occupy assigned spectral bands. Although the legacy fixed spectrum access (FSA) can effectively avoid or minimize interference among different PUs, as reported in [1], the licensed radio spectrum is significantly underutilized by PUs. The available spectrum in economically feasible frequency regions is already limited, and this spectrum underutilization further exacerbates the situation. In order to address spectral underutilization and inefficiency resulting from FSA, dynamic spectrum access (DSA) methods have been proposed to enable unlicensed users to opportunistically share the licensed spectrum on a non-interference basis.

As discussed in Sect. 2, the AF and DF modes result in different cooperative regions, and the SU always selects a relaying mode that achieves a greater throughput gain for the PU. 19) for DF. Only potential candidate SUs satisfying the cooperative conditions respond to the PU, using the orthogonal sub-channels allocated by the SBS. , AF or DF. 20) where the index l1 means that SUl1 can provide the greatest throughput gain among SUs using the AF mode, and index l2 means that SUl2 can provide the greatest throughput gain among SUs using the DF mode.

26, no. 1, pp. 203–213, Jan. 2008. 14. M. Levorato, O. Simeone, U. Mitra, and M. Zorzi, “Cooperation and coordination in cognitive networks with packet retransmission,” in Proc. IEEE Int’l Inf. Theory Workshop, Taormina, Oct. 2009. 15. O. Simeone, Y. Bar-Ness, and U. Spagnolini, “Stable throughput of cognitive radios with and without relaying capability,” IEEE Trans. Wirel. , vol. 55, no. 12, pp. 2351–2360, Dec. 2007. 16. Y. Yi, J. Zhang, Q. Zhang, T. Jiang, and J. Zhang, “Cooperative communication-aware spectrum leasing in cognitive radio networks,” in Proc.

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