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基于对无线高速个域网中机会调度的研究,提出了一种适用于WPAN的机会主义时隙调度算法FPTS。该算法充分考虑了信道状态的波动和用户间的公平性,由参数更新模块和调度分配模块组成。参数更新模块根据调度结果更新控制参数,维护用户的公平性和自适应的跟踪信道的变化;调度分配模块负责计算每个用户的公平效用权值,并按照权值向各用户比例分配信道资源。仿真结果表明:所提调度方案能够在保证系统高吞吐量的前提下,获得比PTS算法更好的公平性和信道使用效率。
Based on the research of opportunistic scheduling in WPAN, a opportunistic scheduling algorithm FPTS for WPAN is proposed. The algorithm takes full account of the fluctuation of channel state and the fairness among users, which is composed of parameter update module and scheduling allocation module. The parameter updating module updates the control parameters according to the scheduling result to maintain user fairness and adaptive tracking channel variation. The scheduling assignment module is responsible for calculating the fair utility weight of each user and allocating the channel resources to each user according to the weight. The simulation results show that the proposed scheduling scheme can achieve better fairness and channel efficiency than the PTS algorithm while ensuring the high throughput of the system.