• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2017년도 춘계학술발표대회
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• pp.1051-1053
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• 2017

누구나 놀이공원을 한번쯤 가보면 인기 있는 놀이기구를 몇 시간에 걸쳐 기다렸던 경험이 있을 것이다. 그에 따라 많은 시간이 낭비되고 피곤함도 크게 증가한다. 따라서 이용객의 불편함을 해소하고자 한다. 본 연구에서는 NFC 태그를 활용한 어플리케이션을 개발하여 불필요하게 줄 서서 기다리는 시간을 줄이려 한다. 본 어플리케이션에는 놀이기구 탑승을 위한 알림메시지가 있기 때문에 줄 서서 기다리지 않고 각 놀이기구 마다 설치된 NFC 태그에 터치하는 것으로 기다리지 않고 탑승하여 알림메시지에 따라서 예약 탑승객들이 우선 탑승할 수 있다. 이러한 효과로 이용객에게 편리함을 제공하며 공원 입장에서는 고객의 충성도가 증가하므로 재방문율이 증가하는 효과, 놀이기구 이용 회전율이 증가하는 효과를 기대할 수 있다.

• Journal of KIISE:Information Networking
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• 제37권1호
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• pp.50-56
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• 2010

This paper proposes a data gathering method by adapting the mobile sink to prolong the whole operation time of large WSNs. After partitioning a network into several clusters, a mobile sink visits each cluster and collects data from it. An efficient protocol improves the energy efficiency by delivering messages from the mobile sink to the cluster head as well as reduces the data gathering delay, which is the disadvantage of the mobile sink. For the scalability of sensor network, the network architecture should support the multihop transmission in the duster rather than the single hop transmission. The process for the data aggregation linked to the travelling path is proposed to improve the energy consumption of intermediate nodes. The experiment results show that the proposed model is more efficient than legacy methods in the energy consumption and the data gathering time.

• Journal of the Institute of Electronics Engineers of Korea CI
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• 제46권5호
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• pp.79-85
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• 2009

A sink node and its neighbor nodes spend more energy than other nodes since a stationary sink node collects data from wireless sensor networks(WSNs). For larger WSNs, the unbalanced energy of nodes causes the operation of WSNs to stop rapidly. This paper proposes a data gathering method by adapting the mobile sink to prolong the life time of large WSNs. After partitioning a network into several clusters, a mobile sink visits each cluster and collects data from it. An efficient algorithm is proposed to improve the energy efficiency by delivering the message from the mobile sink to the cluster head as well as to reduce the data gathering delay, which is the disadvantage of the mobile sink. Also, The algorithm is analyzed for the energy consumption and the data gathering delay. The validity of the ananlysis result is confirmed by the simulation.