蜂窝终端直通混合网络中基于不同终端速率要求的资源调度策略

发布时间：2018-06-10 12:11

本文选题：无线通信 + 混合网络　；参考：《电子与信息学报》2014年10期

【摘要】：该文针对蜂窝终端直通(Device-to-Device,D2D)混合网络的两类终端提出一种新的无线资源调度策略,以提高混合网络整体性能实现无线资源的高效利用。该文无线资源调度问题分为频谱资源块和终端功率分配两个部分,首先,对该问题以混合网络和速率最大为优化目标进行理论建模,其约束条件为最大功率限制以及速率需求比值。速率需求比值可以用来区分蜂窝和直通(D2D)两类终端各自的速率需求,从而满足不同的服务质量(Quality of Service,QoS)。接着,通过拉格朗日乘数求解法,得到了上述最优化问题的最优解,即蜂窝和直通(D2D)终端分配的最优资源块序号以及功率值。从最优解可以看出,资源块的选取和功率分配两者互为条件选择的关系。根据这一结论,该文给出相应的调度策略,其中功率分配部分采用注水算法来实现。最后,通过系统级仿真,可以看出提出的新调度策略在混合网络的总吞吐和终端用户的公平性上都可实现较大提升。
[Abstract]:In this paper, a new wireless resource scheduling strategy is proposed for two types of wireless resource scheduling in a cellular terminal via a Device-to-DeviceD2D) hybrid network, which can improve the overall performance of the hybrid network and achieve efficient utilization of wireless resources. In this paper, the radio resource scheduling problem is divided into two parts: spectrum resource block and terminal power allocation. Firstly, the hybrid network and the maximum rate are used as the optimal targets to model the problem theoretically. The constraint conditions are maximum power limit and rate demand ratio. The rate demand ratio can be used to distinguish the rate requirements of two types of terminals, namely cellular and straight through D2D, so as to satisfy different quality of service QoS (QoS). Then, the optimal solution of the above optimization problem is obtained by Lagrange multiplier solution, that is, the optimal resource block sequence number and power value of the cellular and through D 2D terminal assignment. It can be seen from the optimal solution that the selection of resource blocks and power allocation are conditional choices. According to this conclusion, this paper presents the corresponding scheduling strategy, in which the power allocation is implemented by water injection algorithm. Finally, through system-level simulation, it can be seen that the proposed new scheduling strategy can greatly improve the total throughput of hybrid networks and the fairness of end-users.
【作者单位】：北京邮电大学信息与通信工程学院;
【基金】：国家科技重大专项(2012ZX03003011,2012ZX03003007) 国家973计划项目(2012CB316005) 国家自然科学基金-广东联合基金(U1035001)资助课题
【分类号】：TN929.5

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