• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1190-1193
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• 2009

최근 무선네트워크의 급격한 발달로 이동 중에도 통신을 할 수 있는 요구사항에 IETF에서는 Mobile IPv6(MIPv6)라는 기술을 제안하였다. MIPv6는 IPv6환경에서 모바일 노드(모바일 노드)가 이동을 하면서도 통신을 할 수 있는 기술인데, 실제 상용망에서는 사용되지 않고 있다. 그 이유는 모바일 노드에 이동성을 제공하는 모바일 스택의 탑재가 높은 오버헤드를 가지고 있고, 시그널링 비용이 많이 들기때문이다. 이와 같은 문제를 해결하기 위해서 지난 해 Proxy Mobile IPv6(PMIPv6)가 표준화 되었다. PMIPv6는 모바일 노드에 이동성을 제공하는 모바일 스택을 올리지 않고 네트워크 엔티티가 대신 모바일 스택을 가지고 시그널링을 처리하기 때문에 결과적으로 시그널링 비용을 줄였다. 하지만 PMIPv6에서는 인접한 네트워크 사이에서 패킷을 전송할 때 MAG간의 통신이 가능하지 않고, 오직 LMA를 통하여 대응 노드(대응 노드)에게 패킷을 전송할 수 있다. 게다가 같은 서브넷에 있는 대응 노드에게 패킷을 전송할 때도 LMA를 거치게 되는 불필요한 과정이 발생한다. 게다가 LMA를 통하여 패킷을 전송하는 방식은 지연과 리오더링(Re-Ordering)을 발생시켜본 패킷 재전송을 유발하여 전송 품질을 떨어뜨리게 된다. 본 논문에서는 인접한 MAG간의 통신, 또는 같은 서브넷 내에서의 통신에서 LMA를 거치지 않고 통신을 할 수 있는 방안으로 블룸 필터를 이용한 통신 기법을 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.1
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• pp.11-24
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• 2012

Without a proper protection mechanism for the signaling messages to be used for the mobility support in the Proxy Mobile IPv6 (PMIPv6), it is also vulnerable to several security attacks such as redirect attack, MITM (Man-In-The-Middle) attack, replay attack and DoS (Denial of Service) attack as in Mobile IPv6. In this paper, we point out some problems of previous authentication mechanisms associated with PMIPv6, and also propose a new fast and secure authentication mechanism applicable to PMIPv6. In addition, it is also shown that the proposed one is more efficient and secure than the previous ones.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.10
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• pp.148-155
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• 2007

The routing optimization mode, which Mobile IPv6 provides for the direct communication between a mobile node and its correspond node, introduces various security threats, thus causing several protocols to be proposed for the secure binding update procedure. In particular, the Kang-Park protocol, which Kang and Park presented in 2005, achieves the optimized cryptographic operations and the strong security, while based on its unique security proxy structure. In spite of such advantages, it has some drawbacks in terms of security and efficiency. This paper improves the Kang-Park protocol through the strong CoA validation and early binding update methods. Also, we show that the improved protocol is better than others.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.8B
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• pp.1105-1114
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• 2010

The Proxy Mobile IPv6 (PMIPv6) has been standardized by the IETF NETLMM WG for network-based mobility management. The PMIPv6 can provide IP mobility for Mobile Nodes (MNs) with low handover latency and less wireless resource usage. But, since the PMIPv6 is basically designed for local mobility management, it cannot support directly global mobility management between different PMIPv6 domains. In the PMIPv6, since all traffic is routed through a Local Mobility Anchor (LMA), it causes a long end-to-end delay and triangular routing problem. Therefore, in this paper, we propose a fast network-based global mobility management scheme and route optimization scheme with a new network entity, called Global Mobility Agent (GMA). Numerical analysis and simulation results show that the proposed scheme is able to support global mobility between different public domains with low handover latency and low end-to-end delay, compared with the PMIPv6.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.9
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• pp.2118-2135
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• 2012

With the rapid development of heterogeneous emerging wireless technologies and numerous types of mobile devices, the need to support robust mobile video streaming based on the seamless handover in Future Internet is growing. To support the seamless handover, several IP-based mobility management protocols such as Mobile IPv6 (MIPv6), fast handover for the MIPv6 (FMIPv6), Hierarchical MIPv6 (HMIPv6) and Proxy Mobile IPv6 (PMIPv6) were developed. However, MIPv6 depreciates the Quality-of-Service (QoS) and FMIPv6 is not robust for the video services in heterogeneous emerging wireless networks when the Mobile Node (MN) may move to another visited network in contrast with its anticipation. In Future Internet, the possibility of mobile video service failure is more increased because mobile users consisting of multiple wireless network interfaces (WNICs) can frequently change the access networks according to their mobility in heterogeneous wireless access networks such as 3Generation (3G), Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMax) and Bluetooth co-existed. And in this environment, seamless mobility is coupled according to user preferences, enabling mobile users to be "Always Best Connected" (ABC) so that Quality of Experience is optimised and maintained. Even though HMIPv6 and PMIPv6 are proposed for the location management, handover latency enhancement, they still have limit of local mobility region. In this paper, we propose a robust mobile video streaming in Heterogeneous Emerging Wireless Systems. In the proposed scheme, the MN selects the best-according to an appropriate metric-wireless technology for a robust video streaming service among all wireless technologies by reducing the handover latency and initiation time when handover may fail. Through performance evaluation, we show that our scheme provides more robust mechanism than other schemes.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.11
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• pp.1997-2015
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• 2011

In this paper, we propose the enhanced network-based mobility management protocol, called enhanced proxy mobile ipv6 (E-PMIPv6), which can provide mobile nodes (MNs) with a fast and efficient mobility service in PMIPv6 domain. The proposed scheme can provide a fast and efficient mobility service to MNs and also the strength of network scalability and stability to an access network by proposing the dynamic virtual hierarchical network architecture. In addition, the pre-authentication procedure for an MN, based on the information of neighbor mobile access gateway (MAG) list in the enhanced-policy server (E-PS), is proposed to support seamless handover by reducing MN's handover latency. Through performance evaluations of numerical analyses and simulations, we have confirmed and verified the superiority of the proposed scheme compared to the conventional proxy mobile ipv6 (PMIPv6).

• Journal of Communications and Networks
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• v.15 no.2
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• pp.142-152
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• 2013

The network mobility basic support (NEMO BS) protocol has been investigated to provide Internet connectivity for a group of nodes, which is suitable for intelligent transportation systems (ITS) applications. NEMO BS often increases the traffic load and handover latency because it is designed on the basis of mobile Internet protocol version 6 (MIPv6). Therefore, schemes combining proxy MIPv6 with NEMO (P-NEMO) have emerged to solve these problems. However, these schemes still suffer from packet loss and long handover latency during handover. Fast P-NEMO (FP-NEMO) has emerged to prevent these problems. Although the FP-NEMO accelerates handover, it can cause a serious tunneling burden between the mobile access gateways (MAGs) during handover. This problem becomes more critical as the traffic between the MAGs increases. Therefore, we propose a scheme for designing an improved FP-NEMO (IFP-NEMO) to eliminate the tunneling burden by registering a new address in advance. When the registration is completed before the layer 2 handover, the packets are forwarded to the new MAG directly and thereby the IFP-NEMO avoids the use of the tunnel between the MAGs during handover. For the evaluation of the performance of the IFP-NEMO compared with the FP-NEMO, we develop an analytical framework for fast handovers on the basis of P-NEMO. Finally, we demonstrate that the IFP-NEMO outperforms the FP-NEMO through numerical results.

• Journal of Digital Contents Society
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• v.12 no.1
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• pp.11-21
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• 2011

The PMIPv6 protocol that has been recently presented as an alternative for the MIPV6 has been getting much persuasion by the system resource and the network bandwidth and the advancement of the network cost. we propose an effective scheduling for multicast services based on the PMIPv6 with hand-over mechanism. it provides an additional function that is able to change multicast join processes dynamically in accordance with MAG status. in order to evaluate the ability of the proposed scheme's We test the performance of hand-over and node join costs with similar techniques. The result of simulation shows improves about 13~35% of performance.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.10
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• pp.119-126
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• 2007

Recently, the mobility of users and mobile communication technologies have developed rapidly. The users in this state also want to connect their devices and to receive services anywhere, anytime. Hierarchical Mobile IPv6 (HMIPv6) has been proposed by the Internet Engineering Task Force (IETF) to compensate for such problems as handover latency and signaling overhead when employing Mobile IPv6 (MIPv6). HMIPv6 supports micro-mobility within a domain and introduces a new entity, namely Mobility Anchor Point (MAP) as a local home agent. However, HMIPv6 has been found to cause longer handover latency when the inter-domain handover occurs. This is because a Mobile Node (MN) has to generate two addresses and register them to Home Agent (HA) a MAP, respectively. In order to solve such problems, we propose a scheme that an MN generates one address and registers it to HA for supporting fast handover during the inter-domain handover process. In the proposed scheme, the load of MAP and MAP domain is reduced because the number of MNs which are managed by MAP is decreased and the MAP does not perform proxy Neighbor Discovery Protocol (NDP) to intercept packets destined to MNs. We evaluate the performance of proposed scheme in comparison to HMIPv6 through the simulation and numerical analysis.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.7A
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• pp.688-696
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• 2010

The Proxy Mobile IPv6 (PMIPv6) is a network localized mobility management protocol that is independent of global mobility management protocols. In a single mobility domain (LMD), the mobile node (MN) is not involved in any IP mobility-related signaling and uses only its PMIPv6 home address for all its communication. Subsequently, when the MN moves into another LMD, the MN must change its PMIPv6 home address. In such a circumstance, host-based mobility signaling is activated. Thus, the nature of the network-based mobility of the PMIPv6 cannot be retained. Additionally, if the MN does not support global mobility, it cannot maintain communication with its correspondent node (CN). In this paper, we propose a solution for global mobility support in PMIPv6 networks, called Global-PMIPv6 that allows current communication sessions of a MN without mobility protocol stacks to be maintained, even when the MN moves into another LMD. Thus, Global-PMIPv6 retains the advantages of the PMIPv6 for global mobility support. We then evaluate and compare network performance between our proposed solution and PMIPv6.