Smart Caching for QoS-Guaranteed Device-to-Device Content Delivery  

作　　者：Yanli Xu 

机构地区：[1]The College of Information Engineering, Shanghai Maritime University

出　　处：《China Communications》2018年第1期128-139,共12页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under grant 61601283, 61472237 and 61271283

摘　　要：Caching at user equipment(UE) provides a feasible way for device-to-device(D2D) content delivery among proximal users without deploying additional infrastructures. To support D2D content delivery for mobile traffics with quality-of-service(QoS) requirements, smart caching problem is essential to be solved especially when there is no prior knowledge on demands of proximal users. In this paper, impacts of Qo S requirements and limited caching capacity on UE caching are analyzed, respectively, based on which a caching scheme is proposed. With the proposed caching scheme, UE can determine whether caching a content or not intelligently to guarantee a content request via D2D communications in the network. Simulation results are presented which verify the analyzed influencing factors on D2D caching and the proposed QoS-provisioning caching scheme.Caching at user equipment(UE) provides a feasible way for device-to-device(D2D) content delivery among proximal users without deploying additional infrastructures. To support D2D content delivery for mobile traffics with quality-of-service(QoS) requirements, smart caching problem is essential to be solved especially when there is no prior knowledge on demands of proximal users. In this paper, impacts of Qo S requirements and limited caching capacity on UE caching are analyzed, respectively, based on which a caching scheme is proposed. With the proposed caching scheme, UE can determine whether caching a content or not intelligently to guarantee a content request via D2D communications in the network. Simulation results are presented which verify the analyzed influencing factors on D2D caching and the proposed QoS-provisioning caching scheme.

关 键 词：D2D communication CONTENT de-livery CACHING strategy OVERFLOW PROBABILITY 

分 类 号：TN915.0[电子电信—通信与信息系统]