A bandwidth allocation algorithm with channel quality and QoS aware for IEEE 802.16 base stations |
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Authors: | Yi‐Hsuan Yeh Yuan‐Cheng Lai Yen‐Hung Chen Ching‐Neng Lai |
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Affiliation: | 1. Department of Information Management, National Taiwan University of Science and Technology, Taipei, 106, Taiwan;2. Department of Information Technology, Hsing Wu Institute of Technology, New Taipei City 244, Taiwan |
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Abstract: | Subscriber stations located in different places encounter various interferences in an IEEE 802.16 network, resulting in that their communication channels experience varying channel conditions. Thus, an excellent bandwidth allocation algorithm should not only satisfy various QoS required by heterogeneous traffic, but also consider the channel quality to maximize bandwidth utilization. In this paper, a bandwidth allocation algorithm with channel quality awareness and QoS guarantee, called CQQ, is proposed. CQQ not only satisfies each connection's QoS requirement, but also dynamically adjusts the downlink/uplink bandwidth to match current downlink/uplink traffic ratio. CQQ allocates more bandwidth to the connections having better channel quality by applying weighted fair queuing strategy to raise the bandwidth usage. CQQ provides lower delay violation ratio and higher goodput than the previous algorithms, as observed from the simulation results. Copyright © 2012 John Wiley & Sons, Ltd. |
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Keywords: | IEEE 802 16 quality of service scheduling WiMAX |
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