Effect of Relay Capability on VoIP Performance in OFDMA based Relay Systems 


Vol. 34,  No. 3, pp. 304-310, Mar.  2009


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  Abstract

In this paper, we evaluate the performance of VoIP in OFDMA-based relay systems with various capabilities of relays. We classify relays according to capability as “mid-capability (MC)” and “high-capability (HC)” relay. In system with HC relays, not only base station (BS) but also relay station (RS) performs scheduling at its own, whereas only BS performs scheduling in system with MC relays using the information reported by MS (i.e. the received signal-to-interference-plus-noise ratio (SINR) of mobile station (MS), the amount of MS traffic, etc). In system with MC relays, the controling overhead of BS is larger than that of system with HC relays. However, since BS has all MS information, efficient resource allocation and scheduling is possible. We derived the “average packet delay,” “good packet ratio,” and “cell goodput” in a VoIP environment. The simulation results demonstrate that the system with MC relays has better VoIP performance over that with HC relays.

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  Cite this article

[IEEE Style]

S. Ahn, H. Choi, D. Hong, J. Lim, "Effect of Relay Capability on VoIP Performance in OFDMA based Relay Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 304-310, 2009. DOI: .

[ACM Style]

Sungbo Ahn, Hoyoung Choi, Daehyoung Hong, and Jaechan Lim. 2009. Effect of Relay Capability on VoIP Performance in OFDMA based Relay Systems. The Journal of Korean Institute of Communications and Information Sciences, 34, 3, (2009), 304-310. DOI: .

[KICS Style]

Sungbo Ahn, Hoyoung Choi, Daehyoung Hong, Jaechan Lim, "Effect of Relay Capability on VoIP Performance in OFDMA based Relay Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 304-310, 3. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880