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Data Pre-Caching Mechanism in NDN-based Drone Networks

NDN 기반 드론 네트워크의 데이터 사전 캐싱 기법

  • Choi, Suho (Dept. of Computer Software, Hanyang University) ;
  • Joe, Inwhee (Dept. of Computer Software, Hanyang University) ;
  • Kim, Wontae (Dept. of Computer Science and Engineering, Koreatech University)
  • Received : 2019.10.08
  • Accepted : 2019.11.28
  • Published : 2019.12.31

Abstract

Networking services based on the flying drones may cause many handover events because the coverage radius is narrower than that of the existing infrastructure, such as cellular networks. Therefore, it copes with frequent handover by pre-caching data to target network provider before handover using a content store. As a result of the simulation, it can be confirmed that the delay is lowered. This is because the data that was requested before the handover is delivered to the target drones, and the car that has completed the handover receives the data through the target drones. On the other hand, if the proposed method is not used, it can be confirmed that the delay is increased. This is because it can not cope with the path change due to the handover and re-sends the packet requesting the data.

비행하는 드론 기반 네트워킹 서비스는 셀루러 네트워크와 같은 기존 통신 인프라보다 커버리지 반경이 좁기 때문에 많은 핸드오버 이벤트를 유발할 수 있다. 따라서, 컨텐트 스토어를 활용하여 핸드오버 이전에 요청한 데이터를 핸드오버 이후 타겟 네트워크 제공자에게 사전에 캐시 함으로써 잦은 핸드오버에 대응하였다. 시뮬레이션 결과, 핸드오버 이전에 요청한 데이터를 타겟 드론에게 전달하였고 핸드오버를 끝낸 자동차가 타겟 드론을 통해 데이터를 받음으로써 딜레이가 감소함을 확인할 수 있었다. 반면에, 제안하는 방법을 사용하지 않으면 핸드오버에 따른 경로 변경에 대응하지 못하였고 데이터를 요청하는 패킷을 다시 보냄으로써 딜레이가 증가했음을 확인했다.

Keywords

References

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