QoS区分的高速移动OFDMA系统无线资源分配
发布时间：2018-07-27 15:36
【摘要】：针对高速移动环境下多业务多用户正交频分多址(OFDMA)系统下行链路提出一种动态资源分配方案。针对具有不同时延要求的多种类型数据包的数据流,提出了一种考虑多种时延服务质量(QoS)要求的动态资源分配算法。通过应用排队论原理,将用户的时延要求转化为速率约束,结合多普勒频移产生的中断概率的约束,形成一个高速移动环境下考虑用户不同QoS要求的最优化问题。该优化问题为混合整数非线性规划,直接求解的复杂度非常高。为了解决原问题,提出了次优方法。仿真结果表明,在高速移动环境下,提出的方法在保障用户各种QoS时延要求的同时,有效地提高了系统的容量。
[Abstract]:A dynamic resource allocation scheme is proposed for the downlink of multi-service multi-user orthogonal frequency division multiple access (OFDMA) systems in high-speed mobile environment. In this paper, a dynamic resource allocation algorithm considering the (QoS) requirements of multiple delay quality of service (QoS) is proposed for the data flow of various types of data packets with different delay requirements. By applying the queuing theory, the delay requirement of the user is transformed into the rate constraint, and the constraint of the interrupt probability generated by the Doppler shift is combined to form an optimization problem considering the different QoS requirements of the user in a high-speed mobile environment. The optimization problem is a mixed integer nonlinear programming, and the complexity of direct solution is very high. In order to solve the original problem, a suboptimal method is proposed. The simulation results show that the proposed method can effectively improve the capacity of the system while ensuring various QoS delay requirements in the high-speed mobile environment.
【作者单位】： 北京交通大学电子信息工程学院;
【基金】：国家自然科学基金(61101138) 国家科技重大专项(2012ZX03003013-003) 北京市自然科学基金(4132041) 中央高校基本科研业务费(2012JBM007)
【分类号】：TN929.5
[Abstract]:A dynamic resource allocation scheme is proposed for the downlink of multi-service multi-user orthogonal frequency division multiple access (OFDMA) systems in high-speed mobile environment. In this paper, a dynamic resource allocation algorithm considering the (QoS) requirements of multiple delay quality of service (QoS) is proposed for the data flow of various types of data packets with different delay requirements. By applying the queuing theory, the delay requirement of the user is transformed into the rate constraint, and the constraint of the interrupt probability generated by the Doppler shift is combined to form an optimization problem considering the different QoS requirements of the user in a high-speed mobile environment. The optimization problem is a mixed integer nonlinear programming, and the complexity of direct solution is very high. In order to solve the original problem, a suboptimal method is proposed. The simulation results show that the proposed method can effectively improve the capacity of the system while ensuring various QoS delay requirements in the high-speed mobile environment.
【作者单位】： 北京交通大学电子信息工程学院;
【基金】：国家自然科学基金(61101138) 国家科技重大专项(2012ZX03003013-003) 北京市自然科学基金(4132041) 中央高校基本科研业务费(2012JBM007)
【分类号】：TN929.5
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