Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Handover Procedure for Seamless Service Support between Wired and Wireless Networks

유선망과 무선망간의 끊김없는 서비스를 지원하기 위한 핸드오버 절차

  • Yang, Ok-Sik (Dept. of Engineering, Information and Communication University) ;
  • Choi, Seong-Gon (Dept. of Electrical and Computer Engineering, Chungbuk National University) ;
  • Choi, Jun-Kyun (Dept. of Engineering, Information and Communication University)
  • 양옥식 (한국정보통신대학교) ;
  • 최성곤 (충북대학교 전기전자 및 컴퓨터공학부) ;
  • 최준균 (한국정보통신대학교)
  • Published : 2005.12.01
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Abstract

This paper proposes low latency handover procedure for seamless connectivity and QoS support between wired (e.g. Ethernet) and wireless (e.g. WLAN, WiBro(802.16-compatible), CDMA) networks by the mobile-assisted and server-initiated handover strategy. It is assumed that the server decides the best target network considering network status and user preferences. In this procedure, a mobile terminal associates with the wireless link decided at the server in advance and receives CoA as well. When handover occurs without the prediction in wired networks, the server performs fast binding update using physical handover trigger through the MIH (media independent handover) function. As a result, a mobile terminal does not need to perform L2 and L3 handover during handover so that this procedure decreases handover latency and loss.

본 논문에서는 유선망과 무선망간의 끊김없는 연결과 QoS 지원을 위해 네트웍 기반의 Low Latency 핸드오버 절차를 제안한다. 주 기능은 서버와 단말로 구성되며, 서버는 네트웍의 상황과 사용자의 선호도들을 고려하여 핸드오버를 위한 최선의 타겟 네트웍을 미리 평가하고 결정하여 두며, 단말은 서버에 의해 결정된 무선망과 링크 연결 뿐만 아니라 CoA로 사용할 IP 주소를 미리 받아두는 역할을 수행한다. 만약 유선망에서 예고없이 연결이 해제되는 등의 원인에 의해 핸드오버가 요구되면 서버는 MIH (media independent handover) 방법을 이용하여 물리계층의 핸드오버 트리거를 서버로 전송하고 이를 받은 서버는 직접 게이트웨이로 바인딩 업데이트를 수행함으로써 핸드오버 지연시간을 줄일 수 있다는 것을 보여준다.

Keywords

References

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