• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.127-128
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• 2018

본 프로젝트에서는 IoT를 활용한 스마트한 풋살 대관 예약 시스템이다. 최근 건강 및 취미에 관심이 많아지면서 하나의 국면으로 풋살에 대한 관심이 많아지고 있다. 이러한 관심은 관련 블로그 등과 같은 그룹 활동으로 많은 정보를 공유하고 있다. 하지만 풋살장 예약, 팀매칭, 용병에 구하기 등과 풋살장 관리에도 어려움이 있다. 이러한 문제점들을 해결하기 위해 본 프로젝트는 웹과 앱을 활용한 커뮤니티 제공, 풋살장 관리, 팀매칭, 용병 등을 실시간으로 공유하고 활용할 수 있도록 하였다. 팀매칭 및 용병은 실시간으로 상대팀과 채팅 통해 조율할 수 있고 용병게시판을 이용하여 용병을 구할 수 있다. 앱에서는 상대팀이 예약시간의 지각, 불참석을 하면 도착알림을 오게 해주고 풋살장에 도착하여 구장문을 열거나 닫고, 구장 조명을 키거나 끄거나, 구장 실시간 영상, 구장 실시간 이용현황 등을 볼 수 있는 기능들을 제공하며, IoT를 활용한 스마트하게 풋살장 관리 및 운영, 활용할 수 있는 시스템이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.1B
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• pp.7-16
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• 2005

Resource Reservation Protocol(RSVP) can provide Quality-of-Service(QoS) guarantees for real-time services in wired networks. However, RSVP suffers from mobility problem in the mobile Internet. Therefore, to provide seamless QoS services, it is needed that a mobile node makes a reservation everywhere it visits. Recently, many protocols have been proposed to provide QoS guarantees through advance resource reservation. But, these proposals have problems with a waste of bandwidth and the signaling overhead due to advance resource reservation. In this paper, we propose new advance resevation protocol, Proportional Aggregate RSVP(PA-RSVP) to minimize the resource reservation bandwidth and the signaling overhead in the mobile Intemet while providing QoS guarantees. Based on the performance evaluation, we show that the proposed protocol provides an improved performance over existing protocols under various system conditions.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.9
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• pp.1730-1738
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• 1994

Broadband code division multiple access(B-CDMA)previously proposed for personal communication services(PCS) is not suitable for high-speed data services with large variations in speed, because it is designed only for low-speed voice calls with small variations in speed. Meanwhile, hybrid intra-cell TDMA/inter-cell CDMA(Hybrid TDMA/CDMA) recently proposed could accomodate high-speed services easily because of its internal use of the TDMA scheme, but there would be much inefficiency in treating variable bit rate services due to the intrinsic properties of TDMA transmission scheme, In this paper, a media access control(MAC) protocol, called Resevation TDMA/CDMA, which uses a reservation scheme similar to the one in the packet reservation multiple access(PRMA) protocol to compensate for these shortcomings is proposed. In addition, the performance of this protocol is analyzed and compared with conventional protocols by computer simulation. According to the simulation results, it has been shown that the proposed Reservation TDMA/CDMA scheme could support various transmission rates of user data traffics easily, and it could utilize the variations of the treansmission rates in each active call more efficiently.