• Journal of KIISE:Information Networking
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• v.33 no.5
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• pp.380-394
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• 2006

Traditional Internet services provide the same level of qualify to all users without considering about their application's QoS (quality of service) requirements. Because the wireless and Internet technologies are evolving rapidly, the powerful mobile devices are more widely used. Therefore, the new applications such as DMB (digital multimedia broadcasting), VoD (video on demand), telemedicine, and etc. demand appropriate QoS and host mobility. To satisfy free mobility and QoS, we deploy Diffserv (differentiated services) model to the mobile IPv6 networks. We propose the operational procedures and cost analyzing models for providing an MN's mobility and QoS. Also its performance is presented by cost analyzing and the future works are described.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04b
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• pp.639-642
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• 2001

차세대 이동통신망은 "ALL-IP Network" 이라고 불리는 차세대 이동 통신망을 위한 새로운 전송기술과 새로운 망으로 기존 망이 진화하게 될 것이다. 네트웍 계층에서 볼 때 기본적으로 이동단말기에서 IP 패킷을 생성하고 무선/유선 통신망을 통과할 때 이 IP 패킷이 그대로 유지되어 End-to-end 로 전달되는 것을 그 목표로 하고 있다. 본 논문에서는 두 상이한 이동 패킷 통신 시스템간의 Seamless한 통신을 위한 핸드오프를 Mobile IPv6 [4]관점에서 접근할 것이다. (Voice에 대한 고려는 생략하였다.)

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.2B
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• pp.27-35
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• 2005

As the number of Mobile IP users is expected to grow, the signaling overhead associated with mobility management in the wireless Internet is bound to grow. And since the wireless link has far less bandwidth resources and limited scalability compared to the wired network link, the signaling overhead associated with mobility management has a severe effect on the wireless link. In this paper, we propose IP-Grouping algorithm that can greatly reduce the signaling cost in the wireless link as Access Routers(ARs) with a large rate of handoff are grouped into a Group Zone. Based on the numerical analysis and simulation, we show that the wireless signaling cost in the IP-Grouping is much lower than that of the Hierarchical Mobile IPv6 under various condition.

• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.323-326
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• 2007

Mobility Anchor Points are used for the mobility management in HMIPv6 networks. Currently a mobile node selects the MAP farthest away from itself as a new MAP among available candidates when it undertakes a macro handoff. With this technique, however, the traffic tends to be concentrated at a MAP with the largest domain size and the communication cost increases due to the distance between the mobile node and the MAP. In this work, we proposed a cost effective MAP selection scheme. When leaving the current MAP domain. the mobile node calculates the optimum MAP domain size to minimize the local mobility cost at the new MAP domain considering mobile node's velocity and packet transmission rate. The mobile node then selects a MAP domain of size close to the optimum domain size calculated among the candidate MAP domains. In this way, it is possible for the mobile node to select an optimal MAP adaptively taking the network and node states into account, thus reducing the communication cost.