An Adaptive Coverage Control Algorithm for Throughput Improvement in OFDMA-based Relay Systems 


Vol. 34,  No. 9, pp. 876-882, Sep.  2009


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  Abstract

In this paper, we propose a sub-cell coverage control algorithm for enhancement of the cell throughput in OFDMA based relay systems. Relay station (RS) is exploited for improved quality of the received signal in cellular communication systems, especially in shadow areas. However, since a RS requires additional radio resource consumption for the link between the base station (BS) and the RS, we have to carefully control the coverage areas if a mobile station (MS) is serviced via the BS or the RS considering the cell throughput. We consider radio resource reuse as well for the sub-cell coverage configuration by applying various reuse patterns between RSs. We also consider a time varying system by adaptively changing the threshold for coverage depending on the MSs' traffic in the cell. We initially determine the sub-cell coverage of the system depending on the ratio of received signal-interferencenoise-ratio (SINR) of the MS from the BS and RSs, respectively. Then, the “sub-cell coverage threshold” varies based on the “effective transmitted bits per sub-channel” with time. Simulation result shows that the proposed “time varying coverage control algorithm” leads to throughput improvement compared to the fixed sub-cell coverage configuration.

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  Cite this article

[IEEE Style]

M. Hyun, D. Hong, J. Lim, "An Adaptive Coverage Control Algorithm for Throughput Improvement in OFDMA-based Relay Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 9, pp. 876-882, 2009. DOI: .

[ACM Style]

Myungreun Hyun, Daehyoung Hong, and Jaechan Lim. 2009. An Adaptive Coverage Control Algorithm for Throughput Improvement in OFDMA-based Relay Systems. The Journal of Korean Institute of Communications and Information Sciences, 34, 9, (2009), 876-882. DOI: .

[KICS Style]

Myungreun Hyun, Daehyoung Hong, Jaechan Lim, "An Adaptive Coverage Control Algorithm for Throughput Improvement in OFDMA-based Relay Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 9, pp. 876-882, 9. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880