The KIPS Transactions:PartC (정보처리학회논문지C)

Korea Information Processing Society (한국정보처리학회)
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An Enhanced Handoff Mechanism for Cellular IP

Cellular IP 핸드오프 성능개선

  • 김경아 (서울대학교 대학원 컴퓨터공학부/KT 연구개발본부 선임보연구원) ;
  • 김종권 (서울대학교 전기·컴퓨터공학부) ;
  • 박재윤 (KT 연구개발본부)
  • Published : 2002.02.01
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Abstract

Handoff is one of the most important factors that ma? degrade the performance of TCP connections in wireless data networks. In this paper, we present a lossless and duplication free handoff scheme called LPM (Last Packet Marking) for improving Cellular If semisoft handoff. LPM signals the safe handoff cue by sending a specially marked packet to mobile hosts. SPM (Semisoft rePly Message) is the only newly introduced control packet. Our performance study shows that LPM achieves lossless packet delivery without duplication and increases TCP throughput significantly.

핸드오프는 무선 데이터 네트웍에서 TCP 성능을 저하시키는 가장 중요한 요인중 하나이다. 본 논문에서 패킷의 유신과, 중복이 없는 핸드오프 방법인 LPM(Last Packet Marking)을 제시한다. LPM은 Cellular IP 세미소프트 핸드오프를 개선한 방법으로 이동호스트에게 안전한 핸드오프 시점 알려준다. 새고 소개한 제어 패킷은 SPM(Semisoft reply Message) 하나이다. 컴퓨터 시뮬레이션을 통한 실험에서 LPM 방법은 패킷의 중복이나 유신이 없어서 TCP의 성능을 상당히 향상시켰다.

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References

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