HyunGon Kim

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Recently wireless 3<sup>rd</sup> generation mobile telecommunication service providers have been showing strong interest in network-based localized mobility management. This could be a prominent way to support IP mobility to mobile nodes, because it requires minimal functionality on the mobile node. However, there is a limited understanding of security(More)
Mobile IP, which was designed at the working group of IETF, intended to enable nodes to move from one IP subnet to another. That is, it can support node mobility across heterogeneous networks. For this mobility support, a mobile node (MN) must achieve registration at a home agent (HA) when the MN is away from home. In this article, we propose a mobile IP(More)
The terrestrial digital multimedia broadcasting (T-DMB) system provides one-way broadcasting service today and two-way interactive data services through a return channel of mobile telecommunications network are commercialized recently. The possible evolution of the T-DMB will be convergence between it and other services such as RFID, telematics, and so on.(More)
In next generation wireless networks, an application must be capable of rating service information in real-time and prior to initiation of the service it is necessary to check whether the end user's account provides coverage for the requested service. However, to provide prepaid services effectively, credit-control should have minimal latency. In an(More)