期刊名称：International Journal of Wireless & Mobile Networks
印刷版ISSN：0975-4679
电子版ISSN：0975-3834
出版年度：2015
卷号：7
期号：5
页码：107
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：WiMAX Cellular Networks with Multi-hop Relays(MR), standardized as IEEE 802.16j networks, have beenproposed for the improvement of overall throughput by providing last mile high speed broadband service tothe users. The scheduling algorithm at Base Station(BS) plays a vital role in optimal resource allocation.In Queue aware scheduling, Concurrent Transmission Scenarios(CTS) are identified based on high backpressure links, which are used as input for linear programming model that determines the transmissionschedules to maximize the overall throughput with simultaneous transmissions over Independent Links(IL).As shown in the results of Queue aware scheduling algorithm, the increase in the number of ConcurrentTransmission Scenarios, improves the throughput and reaches a steady state after a level because of thelimited number of independent links. In this paper, the installation of Directional Antennas at BaseStation(BS), Relay Stations(RS) is proposed and studied the impact of increase in independent links, so asthe concurrent scenarios with Directional Antennas, and observed some improvement in throughput.Simulation results showed that the proposed Queue aware scheduling with Directional Antennasoutperforms even when the Mobile Stations(MSs) are at the edge of the cell coverage.
关键词：IEEE 802.16j;Throughput; Base Station; Relay Stations; Mobile Stations; Spatial Reuse; Directional;Antennas; Concurrent Transmissions; Independent Links; Queues.
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