An Efficient Cooperative Content Caching Algorithm for Software-Defined Radio Access Networks

被引：0
|
作者：
Zhang T. [1 ]
Li Q. [1 ]
Zhang J.-L. [2 ]
Zhang C.-X. [1 ]
机构：
[1] School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, 430074, Hubei
[2] School of Information Science and Engineering, Lanzhou University, Lanzhou, 730000, Gansu
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2017年 / 45卷 / 11期
关键词：
Content popularity; Content provisioning cost; Cooperative caching; Software-defined radio access networks;
D O I：
10.3969/j.issn.0372-2112.2017.11.011
中图分类号：
学科分类号：
摘要：
In order to alleviate the contradiction between the massive mobile data traffic and the limited capacity of wireless backhaul links, a cooperative content caching algorithm is proposed for Software-Defined Radio Access Networks (SD-RAN), where the Macro-cell Base Station (MBS) equipped with centralized control logic and programmable interfaces, coordinates the content caching performed at the Small-cell Base Stations (SBSs).Moreover, in order to strike a balance between the local hit ratio and miss ratio, a cooperative caching algorithm is proposed by dividing the cache space of each SBS into two portions, one for storing the most popular contents that are the same across SBSs, one for storing unique contents to facilitate inter-SBSs cooperation.The optimal partition factor at which the average content provisioning cost of the SD-RAN is minimized is analytically obtained in a closed form. © 2017, Chinese Institute of Electronics. All right reserved.
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页码：2649 / 2655
页数：6
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