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EURASIP Journal on Wireless Communications and Networking

, 2011:173

First Online: 18 November 2011Received: 13 August 2011Accepted: 18 November 2011

Abstract

Several burst construction algorithms for orthogonal frequency division multiple access were proposed. However, these algorithms did not meet the downlink burst characteristics specified in the IEEE 802.16 standard. This article therefore proposes the best corner-oriented algorithm BCO. BCO not only complies with downlink burst characteristics, but also considers the three issues to obtain high throughput, as follows: BCO maintains all free slots as a continuous area by constructing each burst in the corner of the available bandwidth area for minimizing external fragmentation; BCO shrinks the burst area to minimize internal fragmentation, if the requested bandwidth has been satisfied; and for exploring the continuous subchannels with good channel quality, BCO ensures that the burst adopts an optimal modulation coding scheme by selecting the excellent corner that can generate the maximal throughput. The simulation results indicate that BCO achieves 2-9 times the throughput achieved by the previous algorithms under a heavy load.

Keywordsburst construction downlink IEEE 802.16 OFDMA Electronic supplementary materialThe online version of this article doi:10.1186-1687-1499-2011-173 contains supplementary material, which is available to authorized users.

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Autor: Yuan-Cheng Lai - Yen-Hung Chen

Fuente: https://link.springer.com/







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