Journal of Xidian University ›› 2022, Vol. 49 ›› Issue (2): 36-41.doi: 10.19665/j.issn1001-2400.2022.02.005

• Information and Communications Engineering • Previous Articles     Next Articles

Design of an online caching scheme in fog networks

SUN Rong1,2(),ZHENG Huihui3(),LIU Jingwei4()   

  1. 1. State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China
    2. Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen 361021,China
    3. Zhong Yuan Bank Co.,Ltd,Zhengzhou 450000,China
    4. Shaanxi Key Laboratory of Blockchain and Secure Computing,Xidian University,Xi’an 710071,China
  • Received:2020-09-14 Online:2022-04-20 Published:2022-05-31


Driven by the vision of 5G communications,an efficient solution which applies the coded caching technology to obtain data quickly in fog networks is proposed.First,this paper models the cache architecture based on the fog computing networks as the two-hop network,and proposes a decentralized online coded caching scheme based on file splitting and MDS encoding for the two-hop network.This scheme ensures that the cache content of relays and users is consistent with the files in the server by updating the server files and updating the cache content of relays and users,so as to maintain the validity of the cache content.We then analyze the tradeoff between the cache memory and the traffic load for two-hop networks where each relay and user has limited cache memories.Simulation results show that the proposed schemes have a low transmission load and can relieve network congestion effectively.

Key words: fog computing, online caching, decentralization, traffic load

CLC Number: 

  • TN919.2