The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Analysis and Reduction of Transient Time Periods for Smooth Handoff Packets in Mobile IPv6 Networks

Mobile IPv6망에서 Smooth 핸드오프 패킷의 과도기간 분석 및 단축

  • Published : 2003.11.01
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Abstract

In the paper, we investigate the impact of handoff on the packet delivery in the Mobile IPv6 networks, where the smooth handoff is adopted. That is measured by an 'unstable time period (UTP)', a 'silence time period(STP)', and a 'handoff time period (HTP)' in the mobile node's perspective. Then, we propose a queuing model to get the exact value of the handoff transient time. The numerical results show that the queuing delay for the handoff packets and the involved link (or route) capacities affect the estimated UTP, STP, and HTP. On the other hand, the damage of application caused by handoff will increases when the handoff transient time becomes longer. We show that the priority scheduling method can achieve shorter STP and UP than the FIFO scheduling method that is generally used in best-effort IP network.

본 논문에서는 Mobile IPv6 망에서 Smooth 핸드오프가 패킷의 전송에 끼치는 영향을 분석한다. 분석결과 핸드오프는 단말의 관점에서 불안정구간(UTP), 묵음구간(UTP), 핸드오프구간(HTP)으로 구분됨을 보인다. 또한 정확한 구간의 값을 구하기 위해 큐잉 모델을 제시한다. 수치해석의 결과 불안정구간, 묵음구간, 핸드오프구간은 핸드오프 되는 패킷의 큐잉 지연과 패킷이 전송되는 링크의 대역폭에 영향을 받음을 보인다. 한편, 핸드오프의 수행기간이 길어지면 핸드오프로 인한 응용의 피해는 증가한다. 우선순위 스케줄링 기법을 이용하면 기존의 IP망에서 최선형 서비스를 위한 FIFO 스케줄링 방식보다 더 짧은 과도기간을 가짐을 확인한다.

Keywords

References

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