Decentralized asynchronous coded caching design and performance analysis in fog radio access networks

作     者：Jiang, Yanxiang Huang, Wenlong Bennis, Mehdi Zheng, Fu-Chun 

作者机构：National Mobile Communications Research Laboratory Southeast University Nanjing210096 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an710071 China Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai200050 China Centre for Wireless Communications University of Oulu Oulu90014 Finland School of Electronic and Information Engineering Harbin Institute of Technology Shenzhen518055 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2019年

核心收录：

主　　题：Multicasting 

摘      要：In this paper, we investigate the problem of asynchronous coded caching in fog radio access networks (F-RANs). To minimize the fronthaul load, the encoding set collapsing rule and encoding set partition method are proposed to establish the relationship between the coded-multicasting contents for asynchronous and synchronous coded caching. Furthermore, a decentralized asynchronous coded caching scheme is proposed, which provides asynchronous and synchronous transmission methods for different delay requirements. The closed-form expression of the fronthaul load is established for the special case where the number of requests during each time slot is fixed, and the upper and lower bounds of the fronthaul load are given for the general case where the number of requests during each time slot is random. The simulation results show that our proposed scheme can create considerable coded-multicasting opportunities in asynchronous request scenarios. Copyright © 2019, The Authors. All rights reserved.