• Title/Summary/Keyword: Hierarchical Path Control

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Slective Buffering Macro Handover Which Applies The F-SNOOP in Hierarchical structure (계층 구조에서 F-SNOOP을 적용한 선택적 버퍼링 매크로 핸드오버)

  • Ahn Chi-Hyun;Kim Dong-Hyun;Kim Hyoung-Chul;Ryou Hwang-Bin;Lee Dae-Young;Jun Kye-Suk
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.5B
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    • pp.413-420
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    • 2006
  • HMIPv6 is designed to reduce the signaling load to external network and improve handover speed of MN by including Mobility Anchor Point(MAP) in local handover. However in this case of macro handover, it's just used pervious MIPv6 handover algorithm. So, it occurs packet loss and transmission delay problem. In this paper, we propose the mechanism applying the HMIPv6 for Fast Handover to choose suitable to the condition buffering handover. The condition for the selection is result distance measurement between MN and CN, between MN and NAR. Furthermore, using F-SNOOP protocol, it is possible to improve wireless network performance. Wireless network has high Bit Error Rate(BER) characteristic because of path loss, fading, noise and interference. TCP regards such errors as congestion and starts congestion control. This congestion control makes packet transmission rate low. However, F-SNOOP improves TCP performance based on SNOOP and Freeze TCP that use Zero Window Advertisement(ZWA) message when handoff occurs in wireless network.