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Traffic Scheduling Technique with Predictive Sub-channel Allocation for OFDMA Systems

机译:具有OFDMA系统预测子信道分配的流量调度技术

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The main focus of this work is a method development of efficient use of scheduling algorithm in wireless packet transmission. For the next generation wireless access systems, wireless transmission needs efficient QoS control in respect to throughput and fairness consideration. However the state of the wireless channel can change dynamically. With this fact, the wireless system performance will not be stable and the efficient scheduling is not easily achieved. In this work, we propose the wireless packet scheduling algorithm including wireless link state prediction method for the fixed wireless environment. The one-step prediction is implemented using LMS criteria for OFDMA sub-channels. With the predicted sub-channel states, scheduling algorithm can work to balance data service transmission rate for fairness and furthermore throughput. Simulation results are shown that the prediction accuracy rate is increased using the predictive sub-channel allocation than the simple adaptive sub-channel allocation for OFDMA system with adaptive modulation. Furthermore, we show the fairness is better achieved using weighed fairness factor in the simulation.
机译:这项工作的主要重点是一种方法开发在无线数据包传输中有效地使用调度算法。对于下一代无线接入系统,无线传输在吞吐量和公平考虑方面需要有效的QoS控制。然而,无线信道的状态可以动态地改变。有了这个事实,无线系统性能不会稳定,不容易实现有效的调度。在这项工作中,我们提出了包括用于固定无线环境的无线链路状态预测方法的无线数据包调度算法。使用OFDMA子信道的LMS标准实现一步预测。利用预测的子信道状态,调度算法可以用于平衡数据服务传输速率以进行公平性和此外吞吐量。示出了模拟结果:使用预测子信道分配比具有自适应调制的OFDMA系统的简单自适应子信道分配来增加预测精度率。此外,我们展示了在模拟中使用称重的公平因素来实现的公平性。

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