• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.7
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• pp.17-27
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• 2011

In recent years, the interest and research for Future Internet are rapidly increasing. In domestic, MOFI (Mobile Oriented Future Internet) is proposed as one architecture of Future Internet. MOFI is a data transmission architecture which provides a mobility, name-based communication and routing scalability. In this paper we implement a basic MOFI testbed that supports HID-based communication, and verify the feasibility of HID-based communication through experimentation of general service such as PING and WWW service. We used "VirtualBox" as a virtual machine and implement a packet processing and a HCP header addition and translation function using "Click Modular Router".

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.173-178
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• 2011

In this paper, we propose an efficient seamless handover protocol in NEMO environment. Yokoda et al 4. proposed fast handover method with collaboration of access routers in local network and Teraoka et al. 1 showed fast handover method with collaboration of layers in mobile network. These methods can delay the time of overall binding update and increase packets loss when link of router is unstable because they transport packets through only one path or link of router. And they don't also mention redirection method of packets in their protocol in case of unstable link state of routers. The proposed protocol can execute fast binding update and reduce packets loss with collaboration of routers in mobile network.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.844-847
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• 2011

Wireless mesh network (WMN) is a type of mobile ad-hoc network consists of wireless router, mobile clients and gateway which connects the network with the Internet. To provide security in the network it is required to encrypt the message sent among the communicating nodes in such way so that only legitimate user can retrieve the original data. Several security mechanisms have been proposed so far to enhance the security of WMN. However, there still exists a need for a comprehensive mechanism to prevent attacks in data communication. Considering the characteristic of mesh network, in this paper we proposed a public key cryptography based security architecture to establish a secure key agreement among communicating nodes in mesh network. The proposed security architecture consists of two major sections: client data protection and network data protection. Client data protection deals with the mutual authentication between the client and the access router and provide client to access router encryption for data confidentiality using standard IEEE 802.11i protocol. On the other hand, network data protection ensures encrypted routing and data transfer in the multi hop backbone network. For the network data protection, we used the pre-distributed public key to form a secure backbone infrastructure.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.10A
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• pp.796-806
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• 2003

Mobile Node usually communicate with CN bia only it's own HA but Nested Mobile Networks correspond with CN bia all HA involved with them. when Mobile Network of a MR moves from its home link to a foreign link in the stationary network. then Mobile Network of another MR moves from its home link in stationary network to foreign link in previous mobile network. CN send Packet destined to the latter MR via both Home Agent of the former MR and the latter MR. There are two problem in this scenario. One is inefficient routing path that bypass via several HA. the other is waste of transmission resource and delay of Registration process which change of Nested Mobile Network Architecture cause Mobile Router. so We propose MRA(Mobile Relay Agent) to support effective routing by local mobility management.

• Journal of Korea Multimedia Society
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• v.10 no.2
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• pp.226-235
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• 2007

Recently, the lETF NEMO working group on network mobility is standardizing a basic support for moving networks. We need a handover scheme for achieving the performance of transparency during the movement of mobile routers in nested mobile networks. But existing handover schemes for a mobile host are not suitable for network mobility because the packet transmission delay and traffic increase during mobile router's handover in nested mobile networks. Therefore, we propose a new seamless handover scheme using the bi-casting based on Mobile IPv6 for nested mobile networks in this paper. Compared with the handover schemes using bi-directional edge tunneling for host mobility support on simulation. And, the results show that the proposed handover scheme reduces the packet delay during a mobile router changes the point of attachment in nested mobile networks.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.464-464
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• 2004

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2003.05a
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• pp.14-19
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• 2003

IPv6에서는 호스트의 주소 재지정 뿐만 아니라 라우터에 대해서도 주소 재지정 메커니즘을 제공한다. IPv6에서는 기존 망 환경 외에도 Mobile-IP나 Ad-hoc 네트워크 상에서 라우터의 주소를 손쉽게 관리할 수 있는 메커니즘이 절대적으로 필요하다. 이러한 방법으로는 RR(Router Renumbering)이나 APDP(Automatic Prefix Delegation Protocol), DHCPv6 등이 있다. 본 논문에서는 라우터 주소 재지정 기법 중에서 APDP 기법을 리눅스 커널 2.4.x 기반 환경에서 구현하였다. 구현된 프로그램은 기존의 radvd와 통합하여 구성하였으며, 리눅스를 이용한 PC-라우터로 테스트베드를 구성하여 동작을 검증하였다.

• Journal of Korea Multimedia Society
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• v.11 no.10
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• pp.1385-1391
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• 2008

The network-based IP mobility solution - Proxy MIPv6 provides a mobile node with local mobility support without requiring MIPv6 functionality of the mobile node by using two principle functional entities, LMA (Local Mobility Anchor) and MAG (Mobile Access Gateway) located in a Proxy MIPv6 domain. Yet, in case that a mobile node moves into a mobile network located in the domain, the mobile node can't receive the local mobility support any more because it can't communicate with the MAG. This paper proposes a scheme to support nested network mobility in a Proxy MIPv6 domain by adding MAG functionality to a mobile router in the mobile network and evaluates the performance of the proposed scheme. Performance analysis shows that the proposed scheme can increase the performance of handover delay, signaling costs, and packet loss ratio.

• Journal of the Korean Data and Information Science Society
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• v.19 no.1
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• pp.11-24
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• 2008

In this paper, the patterns of movement used in the mobile communication systems are adopted in the mobile computing environment to reduce handover delay and to support seamless handover for MIPv6 based on IEEE 802.11 networks. That is, RtSolPr message and PrRtAdv message can be treated before handover. As the result, it is possible to assign NCoA to MN and Next Access Router(NAR) before handover starts. This can minimize handover delay and reduce the total handover delay.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.1609-1612
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• 2004

Ad hoc network is a kind of new wireless network paradigm for mobile hosts. Ad Hoc wireless networks consist of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized administration. Mobile hosts rely on each other to keep the network connected. Each host is not only mobile hosts but also router. So how to design a routing protocol is the most important problem. Dynamic source routing is a kind of routing protocol. In this paper we suggest a new automatic route shortening method and an energy-aware routing mechanism based on DSR.