• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.36 no.5A
• /
• pp.495-501
• /
• 2011

IEFT proposed MIPv6 for supporting IP movement. Mobile Node is involved signaling that cause handover latency in MIPv6. Recently, Proxy Mobile IPv6 is proposed by IETF for network-based mobility management to reduce overhead in mobile node still suffers from packet loss. PMIPv6 can decrease handover latency which related overhead in MN by using network agent. Therefore, MIPSHOP Working Group proposed fast handover for PMIPv6, fu this paper, we proposed packet bicasting scheme on dual interface mobile node that can support fast handover using PMIPv6 schemes. Further, a numerical analysis is provided to show the benefits of our scheme. In the analysis, various parameters are used to compare our scheme with another procedure.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.36 no.1B
• /
• pp.7-20
• /
• 2011

Recently, Proxy Mobile IPv6(PMIPv6) networks have been studied as the mobility management protocol to effectively use limited wireless resources. And the multicasting, which is core technology of the Internet broadcast system such as mobile IPTV, has been discussed mainly based on PMIPv6 network. However, multicasting based on PMIPv6 network causes disconnection of services because it does not solve problems of packet loss during binding and group joining procedure. Hence, we propose a seamless multicast scheme which prevents packet loss in PMIPv6 networks. The proposed scheme achieves lower latency than the existing scheme because it combines binding and group joining procedure, a1so it does not cause about packet losses due to performing buffering. We proved the performance using the simulations.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2010.04a
• /
• pp.641-644
• /
• 2010

Proxy Mobile IPv6에서는 같은 Local Mobility Anchor 내의 다른 Mobile Access Gateway에 있는 Mobile Node 들의 패킷 전송에 있어서 발생하는 삼각 라우팅 문제는 여전히 존재한다. 이 문제점을 해결하기 위해 인터넷 드래프트 Liebsch와 Dutta에서 제안된 두 가지 Route Optimization 기법의 동작과정을 알아보고, 상호 데이터 전송 상황에서 더 나은 성능을 제공하는 Correspondent Route Optimization 기법을 제안한다. 통신을 맺고 있던 Mobile Node가 Local Mobility Anchor 내 다른 Mobile Access Gateway의 범위로 이동할 경우 발생하는 핸드오버 상황에서 Correspondent Route Optimization 기법을 사용하여 signaling cost를 줄이는 방법을 제안한다. 제안한 Route Optimization 기법은 Correspondent Flag를 추가하여 Mobile Access Gateway 간 Corresponding Binding을 완료하여, Route Optimization을 설정한다. 제안한 Correspondent Route Optimization 기법은 기존의 기법보다 상호 데이터 전송 상황에서 Route Optimization에 필요한 메시지 수가 적기 때문에 시그널링 비용이 감소한다.

• Journal of Information Technology Services
• /
• v.8 no.1
• /
• pp.165-177
• /
• 2009

This paper reviews diverse IP mobility and fast handover mechanisms for seamless Internet services. Especially, fast handover mechanisms for the Proxy Mobile IPv6( PMIPv6) are categorized according to their approaches. Then, a new fast handover PMIPv6(FH-PMIPv6) mechanism is proposed using only L3 signaling message exchange. In the proposed FH-PMIPv6 mechanism, only local mobility anchor(LMA) exchanges L3 signaling messages with mobility access gateways(MAGs) for the fast handover operation. That is, inter-MAG signalling messages are not required for the fast handover operation. Therefore, unlike existing fast handover mechanisms, two relevant neighbouring MAGs need not set up the security association(SA) to protect fast handover related signaling messages and share SA related information. Moreover, the L3 triggering message is defined newly by standard ICMPv6 to trigger promptly the proposed mechanism. Analysis and comparison of the handover latency are performed for the proposed mechanism and existing mechanisms, which shows that the proposed FH-PMIPv6 mechanism has the favorable performance.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2009.11a
• /
• pp.579-580
• /
• 2009

Proxy Mobile IPv6에서는 같은 Local Mobility Anchor 내의 다른 Mobile Access Gateway에 있는 Mobile Node들의 패킷 전송에 있어서 발생하는 삼각 라우팅 문제는 여전히 존재한다. 이 문제점을 해결하기 위해 인터넷 드래프트 Liebsch와 Dutta에서 제안된 두 가지 Route Optimization 기법의 동작 과정을 알아보고, 상호 데이터 전송 상황에서 더 나은 성능을 제공하는 Correspondent Route Optimization 기법을 제안한다. 제안한 Route Optimization 기법은 Correspondent Flag를 추가하여 Mobile Access Gateway 간 Corresponding Binding을 완료하여, Route Optimization을 설정한다. 제안한 Correspondent Route Optimization 기법은 기존의 기법보다 상호 데이터 전송 상황에서 Route Optimization에 필요한 메시지 수가 적기 때문에 시그널링 비용이 감소하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.05a
• /
• pp.871-874
• /
• 2008

이동성을 제공하기 위한 프로토콜 중 오랜 기간 많은 연구로 표준화가 된 Mobile IPv6 (MIPv6)가 있다. MIPv6는 호스트 기반 이동성 제공 프로토콜로서 이동 단말이 이동성에 필요한 시그널링을 직접수행한다. 한편, 최근에 표준화 작업이 진행 중인 Proxy Mobile IPv6 (PMIPv6)는 네트워크 기반 이동성 제공 프로토콜로서 이동 단말이 아닌 네트워크 자체에서 이동성을 제공한다. PMIPv6는 MIPv6에서 Home Agent와 같은 역할을 하는 Local Mobility Anchor 와 이동 단말이 수행하던 시그널링을 대신하는 Mobile Access Gateway를 정의하여 이동성을 제공한다. PMIPv6의 기본 동작 과정에 대한 표준화가 진행됨에 따라 프로토콜의 최적화에 대한 이슈가 부각되고 있다. Route Optimization은 이러한 최적화 이슈 중 하나로서 패킷 전송 시 최적화 된 경로를 설정하고 발생할 수 있는 전송 지연을 최소화하는 기법이다. 본 논문에서는 PMIPv6에서의 Route Optimization을 적용하기 위해 Liebesch 인터넷 드래프트에서 제안 한 기법의 동작 과정을 살펴보고 PMIPv6의 기본 전송 과정과 비교하여 그 성능을 분석하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.04a
• /
• pp.544-547
• /
• 2012

본 논문은 Proxy Mobile IPv6 환경에서 모바일 노드의 통신이 경로 최적화 기법을 적용한 상태에서 다른 MAG로의 이동성을 보장하는 경로 최적화 기법에 대해 연구하였다. Proxy Mobile IPv6 환경에서 삼각 라우팅 문제를 해결하기 위해 경로 최적화를 수행할 때 빠른 처리 속도와 안정성을 가지는 방법을 이동성과 함께 보장하는 방법에 대해 연구하였다. 본 논문에서는 기존의 경로 최적화 기법 중 Liebsch의 기법과 Dutta의 기법들의 문제점인 높은 시그널링 비용이나 이중 소비가 발생하는 비효율적인 측면이 있다. 본 논문에서는 적은 시그널링 비용으로 Local Mobility Anchor와 Mobile Access Gateway로부터 메시지를 받을 경우 모바일 노드의 다른 MAG 간 이동성을 보장하는 경로 최적화 기법에 대해 연구하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.11a
• /
• pp.287-289
• /
• 2013

Fast Handover for Proxy Mobile IPv6 (FPMIPv6), a protocol described in RFC 5949, is used to reduce handover latency and minimize packet loss problem occuring in the Proxy Mobile IPv6 (PMIPv6) protocol. However, during the study of implementing FPMIPv6, we found the Out-of-Order Packet (OoOP) problem that occurs in the experiment of FPMIPv6. Since the OoOP is an issue that affects significantly to QoS of the network, in this paper, we analyze the OoOP problem by using network model. The analysis conducts the cause of occurring OoOP problem due to there exist two paths for data transmitted from Correspondent Node (CN) to MN in FPMIPv6.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.38A no.3
• /
• pp.258-267
• /
• 2013

Recently, Proxy Mobile IPv6(PMIPv6) networks have been drawing attention as the mobility management protocol that uses limited wireless resources effectively. And the multicast, which is a core technology of the Internet broadcast system such as mobile IPTV, has been widely discussed mainly based on PMIPv6 network. However, PMIPv6-based multicast cannot support the global mobility directly between different PMIPv6 domains because PMIPv6 is basically designed for local mobility in single PMIPv6 domain. Moreover, PMIPv6-based multicast causes the disconnection of services because it does not solve the packet loss problem during binding and group joining procedure. In this paper, we propose a global mobility scheme that supports the seamless multicast service in PMIPv6 networks. The proposed scheme supports the global mobility due to the addition of extra signalling messages between LMAs. Also, it achieves low latency because it performs fast binding and group joining procedure. We present the simulation results which show that the proposed scheme achieves the global mobility with low latency through the NS-2 simulation.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.46 no.6
• /
• pp.1-10
• /
• 2009

In a network-based approach such as Proxy Mobile IPv6 (PMIPv6), the serving network controls the mobility management on behalf of a Mobile Node (MN), thereby eliminating a MN from any mobility-related signaling. Although PMIPv6 is being standardized by the IETF NetLMM WG, PMIPv6 still suffers from a lengthy handover latency and the on-the-fly packet loss during a handover. Therefore, this paper presents an enhanced fast handover scheme for PMIPv6. The proposed handover scheme uses the Neighbor Discovery message of IPv6 to reduce the handover latency and packet buffering at the Mobile Access Gateway (MAG) to avoid the on-the-fly packet loss during a handover. In addition, it uses an additional packet buffering at the Local Mobility Anchor (LMA) to solve the packet ordering problem. We evaluate the performance of the proposed handover scheme using both analytical model and simulation. The numerical analysis shows that the proposed scheme has a relatively shorter handover latency. Simulation results demonstrate that the proposed scheme could avoid the on-the-fly packet loss and ensure the packet sequence.