• Journal of Korea Society of Digital Industry and Information Management
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• v.11 no.2
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• pp.67-72
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• 2015

As new Information technology such as IoT develops rapidly, a lot of changes are occurred in our lives. The Internet of Things is the network of physical objects or things embedded with electronics, software, sensors and connectivity to enable it to achieve greater value and service by exchanging data with the manufacturer, operator and/or other connected devices. This change is also applied to tourism industry. These days many people make a tour reservation using the internet. But it is required to consider the efficiency and security of tour reservation system. In this paper, we suggest a tour reservation system. First, we describe the computer reservation system, hotel reservation system and reservation system. Second, we perform the modeling of general reservation system and suggested reservation system. Third, performance evaluation is carried out with respect to efficiency and security. The results show that the suggested reservation system has a better performance than a general reservation system. At last we described the results and future works.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.273-274
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• 2023

본교에서 강의실, 회의실 등 공용공간을 사용하기 위해서는 사용자가 수기로 양식을 작성하여 제출하고 담당자가 처리해야 한다. 이 방식은 사용자가 사용하고자 하는 공간의 예약 현황을 확인할 수 없고, 사용신청 과정에서 직접 담당자를 찾아가야 한다는 불편함이 따른다. 본 연구에서는 이러한 불편함을 개선하기 위하여 마이크로 서비스 아키텍처 기반의 공간 예약 웹서비스를 구현한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.8 no.12
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• pp.4356-4371
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• 2014

When the load in a multi-cell orthogonal frequency division multiple access (OFDMA) system is allowed to excessively increase in face of frequent handover, the cell area becomes smaller than the designed size, and thus continuity of quality of service (QoS) for handover requests cannot be guaranteed. To efficiently support the mobility of a mobile terminal (MT), we should adaptively cope with the resource demand of handover calls. This paper proposes a twofold resource-reservation scheme for OFDMA systems to guarantee continuity of QoS for various mobile multimedia services during MT handover from lightly to heavily loaded cells. Our twofold scheme attempts to guarantee service continuity for handover and to maximize resource allocation efficiency. We performed a simulation to evaluate our scheme in terms of outage probability, handover failure rate, total throughput, and blocking rate.

• Journal of information and communication convergence engineering
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• v.14 no.1
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• pp.21-25
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• 2016

N-screen is a promising technology to improve support for multimedia multicasting, content sharing, content mobility, media scalability, and seamless mobility. In this paper, the WiMedia distributed-MAC (D-MAC) protocol is adopted for development of a seamless N-screen wireless service. Furthermore, to provide a multi-hop, one source multi-use N-screen service through point to point streaming in a seamless D-MAC protocol, a dynamic multi-frame transmission technology is proposed. In this technology, a dynamic time slot allocation scheme and a multi-hop resource reservation scheme are combined. In the proposed dynamic time slot allocation scheme, two thresholds, a hard threshold and a soft threshold, are included to satisfy the power consumption and delay requirements. A multi-frame DRP reservation scheme is proposed to minimize end-to-end delay during the multi-hop transmissions between N-screen devices. The proposed dynamic multi-frame transmission scheme enhances N-screen performance in terms of the multi-hop link establishment success rate and link establishment time compared to the conventional WiMedia D-MAC system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5029-5035
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• 2010

This paper proposes a scheme to maximize traffic capacity for supporting mobile multimedia services. For a handoff session, we suggest a novel resource reservation scheme to adjust the number of reserved resources in macrocell, depending on the number of saturated microcells. The proposed schemes are able to accommodate much more mobile sessions in the microcell and significantly reduce the blocking probability in the macrocell at the expense of the small increment of a forced termination in the microcell. Therefore, our system is more flexible to the increase of traffic in macrocell.

• KIPS Transactions on Computer and Communication Systems
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• v.2 no.8
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• pp.343-348
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• 2013

We proposes a power-aware fixed-priority real-time scheduling algorithm for multimedia service, called static voltage scaling algorithm with multi-granularity resource reservation (STATIC-MULTIRSV). The multi-granularity resource reservation was introduced to deliver higher system utilization and better temporal isolation than the traditional approaches in [2]. Based on this, our STATIC-MULTIRSV is designed to reduce the power consumptions while guaranteeing that all I-frames of each video stream meet their deadlines. We implemented the proposed algorithm on top of ChronOS Real-time Linux [6]. We experimentally compared STATIC-MULTIRSV with other existing methods which showed that STATIC-MULTIRSV reduce power consumption by maximum 15% compared to its experimental counterparts.

• Proceedings of the Korea Contents Association Conference
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• 2005.11a
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• pp.371-375
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• 2005

Giving service in the web environment, which is the service, service, connected to the database server and receiving data from query causes a problem. It declines the efficiency of down loading and offering server service. Through obtaining data from database cashing or database clustering have used in the researches these days.

• Korea Journal of Hospital Management
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• v.4 no.2
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• pp.192-218
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• 1999

The purpose of this research is to suggest how to develop the internet homepage of the general hospital. The research was operated with 72 general hospitals which were titled 'general hospital' by subject in internet web search engine. The contents of general hospital homepage was studied by internet screen. On the other hand, It was surveyed for homepage operation by mail questionaire. The contents was mainly composed with (1) introduction of hospital (2) medical examination and the treatment-related information (3) the information & communication (4) the general medicare service, specialist & employee service. In order to operate homepage effectively, inquiry system, reservation system, consulting, information search, phone number, etc, web database shall be established inside of hospital homepage which will link compatible with computer database in hospital. Human resources employment & purchasing order system used by a enterprise shall be in consideration of adopting, since it has various merits in light of hospital management.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.7
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• pp.289-313
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• 1997

The value of 21 century travel originnate from increasing hate about environment pollution and contirmation of quality of life. Therefore the role of travel industry will developo into travel industry that travel information and knowledge unite with service under computer Reservation system out of basic travel work(counsel, agency, mediation, service, sale) So, a view of the travel industry that it is as following. 1. Operrating CRS of travel industry. 2. Constantly development of travel product and service. 2. Constantly development of travel product and service. 3. Pursuide to humanity and nature 4. Travel for keeping natural environment. 5. Establishment of new travel law. In conclusion, we certity our lappiness through travel and create new travel culture.

• Journal of Communications and Networks
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• v.12 no.3
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• pp.266-274
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• 2010

The efficient network resource management is one of the important topics in a real-time system. In this paper, we present a practical network resource management framework, control-theoretic packet scheduler (CPS) system. Using our framework, an operating system can schedule both input and output streams accurately and efficiently. Our framework adopts very portable feedback control theory for efficiency and accuracy. The CPS system is able to operate independent of the internal network protocol state, and it is designed to schedule packet streams in fine-grained time intervals to meet the resource requirement. This approach simplifies the design of the CPS system, and leads us to obtain the intended output bandwidth. We implemented our prototype system in Linux, and measured the performance of the network resource management system under various network QoS constraints. The distinctive features of our principles are as follows: It is robust and accurate, and its operation is independent of internal network protocols.