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QoS Enhancement Based on Link Quality in Tactical Data Link of KVMF

KVMF 전술네트워크에서 링크 품질에 기반한 QoS 향상 방안

  • 권구형 (국방과학연구소 2기술연구본부 국방사이버기술센터) ;
  • 정현숙 (국방과학연구소 2기술연구본부) ;
  • 임원기 (국방과학연구소 2기술연구본부) ;
  • 윤영득 (국방과학연구소 2기술연구본부) ;
  • 김상수 (국방과학연구소 2기술연구본부) ;
  • 이상진 ((주)유큐브 기술연구소)
  • Received : 2013.08.30
  • Accepted : 2014.02.04
  • Published : 2014.02.28

Abstract

This paper suggests an algorithm to improve QoS by using DTR bit employed in the MIL-STD-188-220 protocol, when there is a multi-path between source and destination in the environment of KVMF tactical network supporting NCW. The MIL-STD-188-220 protocol can evaluate the link quality relatively but it cannot support optimal path selection for QoS. In order to solve this problem, we design an algorithm for selecting path using topology table which reflects measured DTR of path after the completion of transmission. The performance of the proposed algorithm has been evaluated by OPNET simulator. As a result of the simulation, it is found that QoS of proposed algorithm is enhanced higher than that of the MIL-STD-188-220 in the aggravated communication environment.

본 논문은 NCW를 지원하는 KVMF 전술네트워크 환경에서 송신지와 목적지 사이에 다중경로가 존재할 때, 기존의 MIL-STD-188-220 프로토콜에서 사용하는 DTR 비트를 활용하여 QoS를 향상시킬 수 있는 알고리즘을 제안한다. MIL-STD-188-220 프로토콜은 경로의 품질을 상대적으로 평가할 수는 있지만, QoS에 맞는 최적의 경로를 제공하지 못하는 문제점을 갖고 있다. 이를 해결하기 위해 전송을 완료한 경로의 지연시간, 처리량, 신뢰성을 측정하여 토폴로지 테이블에 반영하고, 경로 선택에 활용하도록 알고리즘을 설계하였다. 제안한 알고리즘은 OPNET 시뮬레이터를 이용하여 성능을 평가하였으며, 악화된 통신 환경에서 MIL-STD-188-220에 비하여 성능이 향상됨을 확인하였다.

Keywords

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