• The KIPS Transactions:PartC
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• v.19C no.2
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• pp.99-118
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• 2012

In PMIPv6-based network, mobile nodes can be made smaller and lighter because the network nodes perform the mobility management-related functions on behalf of the mobile nodes. The one of the protocols, Fast Handovers for Proxy Mobile IPv6(FPMIPv6)[1] has studied by the Internet Engineering Task Force(IETF). Since FPMIPv6 adopts the entities and the concepts of Fast Handovers for Mobile IPv6(FMIPv6) in Proxy Mobile IPv6(PMIPv6), it reduces the packet loss. Conventional scheme has proposed that it cooperated with an Authentication, Authorization and Accounting(AAA) infrastructure for authentication of a mobile node in PMIPv6, Despite the best efficiency, without begin secured of signaling messages, PMIPv6 is vulnerable to various security threats such as the DoS or redirect attAcks and it can not support global mobility between PMIPv. In this paper, we analyze Kang-Park & ESS-FH scheme, and then propose an Enhanced Security scheme for FPMIPv6(ESS-FP). Based on the CGA method and the pubilc key Cryptography, ESS-FP provides the strong key exchange and the key independence in addition to improving the weaknesses for FPMIPv6. The proposed scheme is formally verified based on Ban-logic, and its handover latency is analyzed and compared with that of Kang-Park scheme[3] & ESS-FH and this paper propose inter-domain fast handover sheme for PMIPv6 using proxy-based FMIPv6(FPMIPv6).

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.886-889
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• 2008

There are Proxy Mobile IPv6(PMIPv6) and Network Mobility Basic Support Protocol (NEMO BSP) for more enhanced mobility support. These have a common purpose to support seamless IP mobility at network infrastructure level whenever mobile nodes(MNs) move between foreign networks. But it is different that the NEMO BSP supports an entire network's mobility, while the PMIPv6 supports only a single MN's mobility. In this paper, a new scheme is proposed to guarantee an interoperability of PMIPv6 and NEMO BSP.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.210-215
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• 2007

본 연구에서는 정보 손실을 최소화하고 웹 페이지 저작자의 의도를 보존하기 위하여 일반적인 웹페이지를 모바일 디바이스(주로 휴대전화)용 웹페이지로 적합화(adaptation)하는 프록시(proxy)를 제안한다. 분할된 이미지에 대한 변환 시 사용되는 경험적인 방법을 제안하고, 웹페이지 변환 시에 발생하는 문제점에 대해 프로세스적인 측면에서 개선된 방법 제시한다. 다른 연구 성과와의 비교 실험을 통하여 제안된 프록시의 성능과 정확도를 비교평가 한다.

• Journal of Digital Contents Society
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• v.11 no.3
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• pp.341-348
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• 2010

Unlike host-based IPv6 mobility support protocols such as Mobile IPv6 (MIPv6), Hierarchical Mobile IPv6 (HMIPv6), and Fast handover for Mobile IPv6 (FMIPv6), Proxy Mobile IPv6 (PMIPv6) is expected to accelerate the real deployment of IPv6 mobility support protocol by using only collaborative operations between the network entities without mobile node (MN) being involved. In this paper, we analyze and compare the handover latency of network-based IPv6 mobility support protocol (i.e., PMIPv6) with the representative host-based IPv6 mobility support protocols such as MIPv6, HMIPv6, and FMIPv6. Analytical results show that the handover latency of PMIPv6 is considerably lower than those of MIPv6 and HMIPv6, and the handover latency of PMIPv6 becomes lower than that of FMIPv6 in case the wireless link delay is greater than the delay between mobile access gateway (MAG) and local mobility anchor (LMA).

• The Journal of Korean Association of Computer Education
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• v.11 no.5
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• pp.67-76
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• 2008

Grid computing has a large scale virtual computing environment that enables a collaborative processing through sharing resources of geographically distributed organizations. In recent year, the development of wireless networks and mobile devices enables mobile devices to consider as a resource of the grids. However, there are some problems such as low performance of processors, small capacity of storages, limited capacity of battery, and low bandwidth. In this paper, to overcome these limitations occurred in mobile grid environments, we proposed a proxy-based mobile grid system. Our proposed system enables mobile devices to play roles as a resource consumer and a resource provider and to collaborate with wired grids through a mobile router. Also, we propose an adaptive job scheduling scheme to cope with context changes of mobile devices and compare our scheduling scheme with other scheduling schemes using a simulation tool, SimGrid, to verify the validity of our job scheduling scheme.

• Journal of Internet Computing and Services
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• v.14 no.3
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• pp.67-79
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• 2013

In wireless networks, efficient mobility management to support of mobile users is very important. Several mobility management schemeshave been proposed with the aim of reducing the signaling traffic of MN(Mobile Node). Among them, PMIPv6 (Proxy Mobile IPv6) is similar with host-based mobility management protocols but MN does not require any process for mobility. By introducing new mobile agent like MAG (Mobile Access Gateway) and LMA (Local Mobility Anchor), it provides IP mobility to MN. In this paper, we propose the analytical model to evaluate the mean signalingdelay and the mean bandwidth according to the type of MN mobility. As a result of mathematical analysis, MF-PMIP (Multicasting-based FastPMIP) outperforms compared to F-PMIP and PMIP in terms of parameters for the performance evaluation.

• Journal of information and communication convergence engineering
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• v.11 no.2
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• pp.82-94
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• 2013

In this paper, we propose a novel tunnel-free scheme in a proxy mobile IPv6 (PMIPv6)-based nested network mobility environment; several mobile nodes (MNs) and mobile routers (MRs) compose a hierarchical wireless network topology. Because tunnels created by several MRs overlap and data packets travel along several local mobility anchors (LMAs), the utilization of the wireless section is reduced and the packet forwarding path of the wire-line section is not optimal. In our tunnel-free scheme, the mobile access gateway (MAG) plays an important role in both the wireless and wire-line sections. Using a local binding update, this tunnel-free scheme forwards data packets with a host-based routing table without any tunnel. Establishing a direct tunnel between the MAG and the last LMA, this scheme removes nested tunnels between intermediate LMAs and MRs, and optimizes the forwarding path to the MN in the wire-line section.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.485-487
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• 2009

최근 무선 멀티 인터페이스를 이용한 동시 접속 기술에 관한 연구가 활발히 진행 중이다. 이와 관련된 연구로 IETF Netext WG에서 Proxy Mobile IPv6 (PMIPv6) 기반 멀티인터페이스 지원 기술에 대해서 표준 기술이 논의 중에 있으며 IETF MIF(Multiple InterFace) WG에서도 멀티인터페이스 노드 관점와 네트워크 관점에서 멀티 네트워크 인터페이스 지원 시 발생하는 문제점을 정의하고 이를 해결하기 위한 기존 기술 분석을 진행 중이다. 본 논문에서는 Proxy MIPv6 도메인에서 멀티 호밍 지원 기술을 가진 Proxy MIPv6 프로토콜을 이용한 멀티인터페이스 동시접속과 인터페이스 사이의 inter handoff 지원 기술 시 발생하는 문제점들을 정의하고 가능한 해결 시나리오에 대해서 논의한다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.373-375
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• 2003

본 논문에서는 이동 통신 사용자 기기의 한계적 계산 능력 및 무선 링크의 대역폭과 디지털 컨텐츠 제공자와의 연결을 고려하여 선택적 Proxy 서비스를 수용한 컨텐츠 교환 목적의 권한 관리 서비스 프로토콜을 제안하였다. 제안한 서비스는 이동 통신 사용자 기기의 한계적 능력에 대해 해당 도메인의 Proxy와 공개키를 기반으로 인증 서비스를 수행하도록 하였으며, 이후 종단 사용자는 해당 인증 결과를 기반으로 인터넷 기반의 디지털 컨텐츠 제공자와의 메시지 교환을 수행하도록 하였다. 또한 사전에 인터넷 기반 구조에 대한 컨텐츠 교환 서비스 요청에 한하여 Proxy의 부분적 서비스를 수행하도록 허용하여 시스템의 대단위 계산 능력에 대한 효율성을 보장할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.181-183
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• 2003

이동 컴퓨팅 환경에서 미디어 서비스를 할 경우 일반 웹 서비스와는 달리 설러 가지 문제들이 발생한다 예를 들면 무선망의 특성상 네트워크 대역폭이 낮고, 네트워크 단절이 발생한다. 본 논문에서는 무선망의 이런 특성에도 불구하고 이동 컴퓨팅 환경에서 실시간 멀티미디어 서비스를 무선 단말에 원활하게 제공하는 방법으로 two-tiered proxy system을 제안한다. 그리고, 효율적인 캐시 관리 메커니즘과 효과적인 handoff를 지원하기 위한 proxy transfer protocol를 또한 제안한다.