C-RAN架构中下行组播与单播业务资源分配算法

C-RAN架构中下行组播与单播业务资源分配算法

马旗超;刘占军;朱志超;于中华

【期刊名称】《计算机工程与设计》 【年(卷),期】2015(000)008

【摘要】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.%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。