• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.1B
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• pp.7-20
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• 2011

Recently, Proxy Mobile IPv6(PMIPv6) networks have been studied as the mobility management protocol to effectively use limited wireless resources. And the multicasting, which is core technology of the Internet broadcast system such as mobile IPTV, has been discussed mainly based on PMIPv6 network. However, multicasting based on PMIPv6 network causes disconnection of services because it does not solve problems of packet loss during binding and group joining procedure. Hence, we propose a seamless multicast scheme which prevents packet loss in PMIPv6 networks. The proposed scheme achieves lower latency than the existing scheme because it combines binding and group joining procedure, a1so it does not cause about packet losses due to performing buffering. We proved the performance using the simulations.

• Journal of KIISE:Information Networking
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• v.36 no.3
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• pp.204-211
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• 2009

Proxy Mobile IPv6(PMIPv6) is that network-based mobility management protocol that network supports mobile node's mobility on behalf of the Mobile Node(MN). In PMIPv6 network, data packets from a Correspondent Node(CN) to a MN will always traverse the MN's Local Mobility Anchor(LMA). Even though, CN and MN might be located close to each other or within the same PMIPv6 domain. To solve this problem, several PMIPv6 Route Optimization(RO) schemes have been proposed. However, these RO schemes may result in a high signaling cost when MN moves frequently between MAGs. For this reason, we propose an adaptive route optimization(ARO) scheme. We analyze the performance of the ARO. Analytical results indicate that the ARO outperforms previous schemes in terms of signaling overhead.

• Journal of Practical Agriculture & Fisheries Research
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• v.26 no.3
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• pp.53-63
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• 2024

This study analyzes the current status of farming succession among young farmers and reviews policy measures to revitalize farming succession. In order to analyze the current status of farming succession to young farmers, a survey was conducted on 186 graduates of Korea National University of Agriculture and Fisheries who are engaged in farming. According to the analysis results, the respondents' farming succession method had a high proportion of intra-family gift and inheritance (56.5%), and the reason for farming succession was mainly due to lack of farming ability due to aging of parents or grandparents (87.6%). Among the difficulties faced by young farmers in the process of farming succession, it was found that the degree of difficulty was high in securing farmland, lack of investment in facilities and operating funds, lack of legal information on gifts and inheritance, and communication problems with parents. A plan to revitalize farming succession for sustainable agriculture is presented as follows. First of all, we are seeking a way to stably hand over the agricultural base of older farmers to young farmers. Second, it is necessary to seek alternatives for the succession of agricultural assets. Third, policy support is needed to solve the difficulties of farming succession. For example, expanding retirement income support for transferred farmers or strengthening support to promote succession to young farmers. Fourth, it is necessary to build a foundation such as consulting and information provision to solve problems that arise in farming succession within the family. Fifth, there is a need to review an effective farming succession plan by converting the management body into a corporation and distributing decision-making rights.