Proactive Caching Strategy Based on Optimal Content Distribution in Content Centric Vehicular Networks

차량 네트워크에서 최적의 컨텐츠 분배 기반의 사전 캐싱 방안

  • Park, Sungjin ;
  • Lee, Euisin
  • 박성진 (충북대학교 전파통신공학과) ;
  • 이의신 (충북대학교 정보통신공학부)
  • Received : 2019.12.23
  • Accepted : 2020.01.16
  • Published : 2020.06.30


In vehicular communications environment, content pre-caching can reduce the delay time from the user to the content server. However, the problem of where and how much pre-caching is still not solved. In this paper, based on the movement probability of the vehicle, we propose a method for pre-caching by distributing the optimized amount of content to each base station candidate that the vehicle will move as follows. First, the movement probability of each vehicle was learned using Markov Model. And the amount of content to be distributed and pre-cached was optimized based on the wireless environment. In experiments based on NS-3, the proposed strategy maintained the least delay compared to the existing protocol, leading to the most traffic-saving results.


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