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  

A New Resource Allocation Algorithm Based on the Different Rate Requirements of Terminal User in Hybrid Network of Device-to-Device and Cellular

作　　者：刘雯雯[1] 杨阳[1] 彭涛[1] 王文博[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《电子与信息学报》2014年第10期2293-2299,共7页Journal of Electronics & Information Technology

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

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。A new wireless resources allocation scheme is proposed to enhance network performance for both cellular and D2D （Device-to-Device） terminal users in a hybrid network. The frequency resource unit and power control can be formed as a sum-rate optimization problem with the constraints of power limitation and the ratio of the rate requirement. The ratio can be utilized to distinguish the rate requirements of both cellular and D2D users with different QoS （Quality of Service）. By using the Lagrange Multiplier Process, this study derives the optimal formula of power and frequency resource unit allocation for both cellular and D2D terminal users. The optimal formula shows that the relationship between the transmission power and frequency resource unit allocation is a problem of mutual constraint. And then the wireless resource allocation scheme algorithm is given. Especially the power allocation can be resolved by the water-filling procedure. The simulation results show that the proposed new resource allocation scheme improves the sum-throughput significantly as well as fairness.

关 键 词：无线通信 混合网络 终端直通(D2D) 资源块分配 功率分配 公平性 

分 类 号：TN92[电子电信—通信与信息系统]