KIPS Transactions on Computer and Communication Systems (정보처리학회논문지:컴퓨터 및 통신 시스템)

Korea Information Processing Society (한국정보처리학회)
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LFH: Low-Cost and Fast Handoff Scheme in Proxy Mobile IPv6 Networks with Multicasting Support

프록시 모바일 IPv6 네트워크에서 멀티캐스팅을 지원하는 저비용의 빠른 이동성관리 기법

  • 김은화 (성균관대학교 정보통신대학원) ;
  • 정종필 (성균관대학교 정보통신대학 겸 산학협력단)
  • Received : 2012.05.23
  • Accepted : 2012.09.21
  • Published : 2013.06.30
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Abstract

With the recent advancements in various wireless communication technologies, the importance of mobile multicasting is coming to the fore, in an effort to use network resources more efficiently. In the past, when various mobile IP-based multicast techniques were proposed, the focus was put on the costs needed for network delivery for providing multicast services, as well as on minimizing the multicast handover delay. For techniques using MIPv6 (Mobile IPv6), a host-based mobility management protocol, however, it is fundamentally difficult to resolve the problems of handover delay and tunnel convergence. To resolve these problems, a network-based mobility management protocol called PMIPv6 (Proxy Mobile IPv6) was standardized. Although performance is improved in PMIPv6 over MIPv6, it still suffers from the problems of handover delay and tunnel convergence. In this paper, to overcome these limitations, a technique called LFH (Low-cost and Fast Handoff) is proposed for fast and low-cost mobility management with multicasting support in PMIPv6 networks. To reduce the interactions between the complex multicast routing protocol and the multicast messages, a simplified proxy method called MLD (Multicast Listener Discovery) is implemented and modified. Furthermore, a TCR (Tunnel Combination and Reconstruction) algorithm was used in the multicast handover procedure within the LMA (Local Mobility Anchor) domain, as well as in the multicast handover procedure between domains, in order to overcome the problem of tunnel convergence. As a result, it was found that LFH has reduced multicast delay compared to other types of multicast techniques, and that it requires lower costs as well.

최근 다양한 무선 통신기술이 발전됨에 따라 네트워크 자원을 효율적으로 사용하기 위하여 모바일 멀티캐스트 기법의 중요성이 부각되고 있다. 기존에는 멀티캐스트 서비스를 위한 네트워크 전달 비용적 측면과 멀티캐스트 핸드오버 지연 최소화에 중점을 두고 모바일 IP기반의 다양한 멀티캐스팅 기법들이 제안되었다. 그러나 호스트 기반의 이동성 관리 기술인 MIPv6(Mobile IPv6)를 이용한 기법들은 근본적으로 핸드오버의 지연과 터널 컨버전스 문제를 해결하기 어렵다. 이러한 문제점을 해결하기 위해서 네트워크 기반의 이동성 관리 기술인 PMIPv6(Proxy Mobile IPv6)를 표준화하였다. PMIPv6는 MIPv6에 비해서 성능이 향상되었지만 여전히 핸드오버 지연과 터널 컨버전스 등의 문제를 가지고 있다. 본 논문에서는 이러한 한계를 해결하기 위하여 PMIPv6 네트워크에서 멀티캐스팅을 지원하는 저비용의 빠른 이동성관리를 위한 LFH(Low-Cost and Fast Handoff) 기법을 제안한다. 복잡한 멀티캐스트 라우팅 프로토콜과 멀티캐스트 구성원 메시지의 상호작용을 줄이기 위해 간소화된 MLD(Multicast Listener Discovery) 프록시 기능을 구현하고 MLD 기능을 수정한다. 그리고 LMA(Local Mobility Anchor) 도메인 내에서의 멀티캐스트 핸드오버 절차와 도메인 간에서의 멀티캐스트 핸드오버 절차에 TCR(Tunnel Combination and Reconstruction) 알고리즘을 사용하여 터널 컨버전스 문제를 해결한다. 그 결과 LFH 기법의 성능이 다른 멀티캐스트 방식과 비교하여 멀티캐스트 중단시간을 줄여주어 더 적은 비용이 든다는 것을 보여준다.

Keywords

References

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