C-RAN架构中下行组播与单播业务资源分配算法  

Downlink resource allocation algorithm for multicast and unicast services in C-RAN architecture

作　　者：马旗超[1] 刘占军[1] 朱志超[1] 于中华[1] 

机构地区：[1]重庆邮电大学移动通信技术重庆市市级重点实验室,重庆400065

出　　处：《计算机工程与设计》2015年第8期2007-2010,2020,共5页Computer Engineering and Design

基　　金：国家重大专项基金项目(2012ZX03003008-004);重庆市教委基金项目(KJ120510);国家863高技术研究发展计划基金项目(2014AA01A701)

摘　　要：在新型C-RAN架构无线接入网中,针对下行资源分配问题,在构建多重组播协作系统传输模型的基础上,根据单播业务用分集协作方法满足QoS,而组播业务用户在同一个频点收到不同的信号可以实现空间分集的特点,提出基于最优化数学模型的最大吞吐量资源分配算法以及利用遗传算法的求解方法,求解使模型目标函数最大的最优单播与组播带宽和功率分配方案。仿真结果表明,该算法能够保证单播用户服务质量,提高组播业务吞吐量。On the basis of the system model of multiple multicast transmission system in the C-RAN architecture network, ac- cording to the features that unicast service utilizes cooperative diversity to satisfy users＇ quality of service （QoS） and multicast service realizes space diversity by users receiving different signals in the same time-frequency resource in terms of downlink re- source allocation in C-RAN architecture, a resource allocation algorithm maximizing throughput based on an optimization mathe matical model and a solution using the genetic algorithm were proposed. And the optimal joint resource allocation scheme was ob- tained by applying the genetic algorithm. Results of simulation indicate that the proposed algorithm can guarantee unicast users~ QoS and improve multicast users＇ throughput simultaneously.

关 键 词：C-RAN架构 组播业务 资源分配 最优化 吞吐量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]