雾无线接入网中的多层协作缓存方法

doi:10.11959/j.issn.1000-436x.2019093

通信学报 ›› 2019, Vol. 40 ›› Issue (9): 116-123.doi: 10.11959/j.issn.1000-436x.2019093

雾无线接入网中的多层协作缓存方法

蒋雁翔¹,夏骋宇^1,²

¹ 东南大学移动通信国家重点实验室，江苏南京 210096
² 香港科技大学电子与计算机工程系，香港 999077

修回日期:2019-06-27 出版日期:2019-09-25 发布日期:2019-09-28
作者简介:蒋雁翔（1977- ），男，山东烟台人，博士，东南大学副教授，主要研究方向为B5G/6G移动通信理论与关键技术、无线大数据智能通信理论与关键技术。|夏骋宇（1997- ），男，江苏丹阳人，香港科技大学硕士生，主要研究方向为雾无线接入网中的边缘缓存技术等。

Multi-tier cooperative caching in fog radio access network

Yanxiang JIANG¹,Chengyu XIA^1,²

¹ National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China
² Electronic and Computer Engineering Department,HongKong University of Science and Technology,HongKong 999077,China

Revised:2019-06-27 Online:2019-09-25 Published:2019-09-28

摘要/Abstract

摘要：

针对边缘缓存和雾无线接入技术中降低后传链路负载的问题，提出了一种雾无线接入网中的多层协作缓存方法。考虑网络架构、文件流行度估计、链路容量等因素，将相关的优化问题分解为每个层中缓存布置的背包问题，并分别使用贪心算法求解。仿真结果表明，所提出的多层协作缓存方法能够有效降低后传链路负载，同时具有较高的缓存命中率。

关键词: 雾无线接入网, 协作缓存, 后传链路负载, 文件流行度

Abstract:

Aiming at the problem of reducing the load of the backward link in the edge buffer and fog wireless access network technology,a multi-tier cooperative caching scheme in F-RAN was proposed to further reduce the backhaul traffic load.In particular,by considering the network topology,content popularity prediction and link capacity,the optimization problem was decomposed into knapsack subproblems in multi-tiers,and effective greedy algorithms were proposed to solve the corresponding subproblems.Simulation results show that the proposed multi-tier cooperative caching scheme can effectively reduce the backhaul traffic and achieve relatively high cache hit rate.

Key words: fog radio access network, cooperative caching, backhaul traffic load, content popularity

中图分类号:

TN915

蒋雁翔,夏骋宇. 雾无线接入网中的多层协作缓存方法[J]. 通信学报, 2019, 40(9): 116-123.

Yanxiang JIANG,Chengyu XIA. Multi-tier cooperative caching in fog radio access network[J]. Journal on Communications, 2019, 40(9): 116-123.

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雾无线接入网中的多层协作缓存方法

Multi-tier cooperative caching in fog radio access network

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