Efficient Radio Resource Allocation for Cognitive Radio Based Multi-hop Systems 


Vol. 37,  No. 5, pp. 325-338, May  2012


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  Abstract

In this paper, a radio resource allocation scheme for a multi-hop relay transmission in cognitive radio (CR) system is proposed to support the employment of relay nodes in IEEE 802.22 standard for wireless regional area network (WRAN). An optimization problem is formulated to maximize the number of serving secondary users (SUs) under system constraints such as time-divided frame structure for multiplexing and a single resource-unit to every relay-hop. However, due to mathematical complexity, the optimization problem is solved with a sub-optimal manner instead, which takes three steps in the order of user selection, relay/path selection, and frequency selection. In the numerical analysis, this proposed solution is evaluated in terms of service rate denoting as the ratio of the number of serving SUs to the number of service-requesting SUs. Simulation results show the condition of adopting multi-hop relay and the optimum number of relaying hops by comparing with the performance of 1-hop system.

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  Cite this article

[IEEE Style]

J. Shin, S. Min, H. Cho, Y. Jang, "Efficient Radio Resource Allocation for Cognitive Radio Based Multi-hop Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 5, pp. 325-338, 2012. DOI: .

[ACM Style]

Jung-Chae Shin, Seung-Hwa Min, Ho-Shin Cho, and Youn-Seon Jang. 2012. Efficient Radio Resource Allocation for Cognitive Radio Based Multi-hop Systems. The Journal of Korean Institute of Communications and Information Sciences, 37, 5, (2012), 325-338. DOI: .

[KICS Style]

Jung-Chae Shin, Seung-Hwa Min, Ho-Shin Cho, Youn-Seon Jang, "Efficient Radio Resource Allocation for Cognitive Radio Based Multi-hop Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 5, pp. 325-338, 5. 2012.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880