Journal ArticleUnknown

Joint Optimization of File Placement and Delivery in Cache-Assisted Wireless Networks

Authors

Bojie Lv, Rui Wang, Ying Cui, Haisheng Tan

Author Affiliations

Institute of Management Business and Law, Southern University, Shanghai Jiao Tong University, University of Science and Technology of China

Year2018

Citations3

DOI10.1109/glocom.2018.8647797

Abstract

In this paper, the downlink file transmission in one cell with the assistance of cache nodes is studied. Specifically, the base station (BS) reactively delivers files to cache nodes and a requesting user in a multicast manner. Therefore, one file transmission may lead to the cache status update, which further affects the future file transmissions. We consider the joint optimization of file placement and delivery. In particular, we first formulate the optimization of transmission power and time in one finite file lifetime as a Markov Decision Process (MDP) with a random number of stages, where the objective is to minimize the transmission resource at the BS. It is shown that the optimal solution can be obtained via a revised Bellman's…

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Fields & Keywords

Physical Sciences Computer Science Computer Networks and Communications Caching and Content Delivery Opportunistic and Delay-Tolerant Networks Cooperative Communication and Network Coding Mathematical optimization Parallel computing Distributed computing Computer network Algorithm Statistics Telecommunications