面向软件定义无线接入网的高效协作内容缓存算法

发布时间：2018-05-06 10:37

本文选题：软件定义无线接入网 + 内容流行度　；参考：《电子学报》2017年11期

【摘要】：为了缓解海量的移动业务数据与容量受限的无线接入网回传链路之间的矛盾,本文提出一种面向软件定义无线接入网(SD-RAN)的协作内容缓存网络架构.在宏蜂窝基站(MBS)的控制管理下,小蜂窝基站(SBS)可以在存储单元有序存储一些高流行度的内容.针对SBS存储单元空间受限问题,进一步提出SD-RAN网络架构下的协作内容缓存算法.该算法中,每个SBS缓存空间被分割成两部分:(1)用于存储全网流行度最高的公共内容以保证各小蜂窝小区本地命中率.(2)用于存储流行度较高的差异化的内容以促进MBS内SBS之间的协作.在此基础上,解析推导具有最优平均内容获取开销的分割参数闭合表达式.仿真结果表明该算法在不同系统参数条件下能显著降低SDRAN的平均内容获取开销.
[Abstract]:In order to alleviate the contradiction between the massive mobile traffic data and the wireless access network return link with limited capacity, this paper proposes a cooperative content caching network architecture for software defined wireless access network SD-RAN. Under the control management of the macrocellular base station (MBS), the small cell base station (SBS) can store some high popularity content in the memory cell in an orderly manner. Aiming at the problem of limited storage cell space in SBS, a collaborative content caching algorithm based on SD-RAN network architecture is proposed. In this algorithm, Each SBS cache space is divided into two parts: 1) for storing the most popular common content in the whole network to ensure local hit ratio of each small cellular cell. On this basis, the partition parameter closure expression with the optimal average content acquisition overhead is derived analytically. Simulation results show that the algorithm can significantly reduce the average content acquisition overhead of SDRAN under different system parameters.
【作者单位】：华中科技大学电子信息与通信学院;兰州大学信息科学与工程学院;
【基金】：国家自然科学基金委NSFC-AF项目(中芬/国际(地区)合作与交流项目)(No.61461136004)
【分类号】：TN929.5

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