• 한국통신학회논문지
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• 제34권3B호
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• pp.225-234
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• 2009

Recently IPTV service is penetrating to the ordinary home users very swiftly. One of the first phase of IPTV service is considered to be VoD, and a nationwide availability of the VoD service imposes tremendous pressure to the network resource due to its requirements for the broad bandwidth, the inherent nature of unicast technology, and the large scalability, etc. This work suggests a novel and practical method to the design of network resource for the VoD service. Especially, we explore the distributed content storage problem that takes into account the popularity of the video contents and its corresponding link dimensioning problem that takes into account the grade of service for the flow level quality of service about the VoD service. By assuming a realistic topology for the nationwide IP backbone network of Korea, which is a typical tree topology, we suggest an analytic method for the design of VoD service.

• Journal of Information Technology Applications and Management
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• 제26권5호
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• pp.57-65
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• 2019

Recommendation Systems are information technologies that E-commerce merchants have adopted so that online shoppers can receive suggestions on items that might be interesting or complementing to their purchased items. These systems stipulate valuable assistance to the user's purchasing decisions, and provide quality of push service. Traditionally, Recommendation Systems have been designed using a centralized system, but information service is growing vast with a rapid and strong scalability. The next generation of information technology such as Cloud Computing and Big Data Environment has handled massive data and is able to support enormous processing power. Nevertheless, analytic technologies are lacking the different capabilities when processing big data. Accordingly, we are trying to design a conceptual service model with a proposed new algorithm and user adaptation on dynamic recommendation service for big data environment.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2022년도 제65차 동계학술대회논문집 30권1호
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• pp.195-198
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• 2022

본 연구는 OTT 서비스에 대한 선택요인들을 기존 연구를 바탕으로 도출하고, 각 평가 요소에 대한 가중치를 산출하기 위하여 AHP 분석모형을 제시하였다. OTT 서비스를 이용하는 고객들을 대상으로 수집된 자료를 분석한 결과 먼저 OTT 서비스의 1단계 선택요인에서는 다양성이 중요한 요인으로 나타났다. 그리고 각 단계별 가중치를 종합화한 결과에서는 오락이 가장 중요한 요인으로 나타났다. 이를 통해 소비자들이 OTT 서비스를 이용할 때 어떤 요인을 중요하게 고려하는지를 파악할 수 있을 것이다.

• 한국통신학회논문지
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• 제34권11B호
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• pp.1191-1199
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• 2009

As the Internet service evolves from the best effort data service to a multimedia service such as a mix of voice, data and video, a need for the guarantee of the quality of service to network services became one of the hot issues for the network operators. On the other hand, the introduction of the multimedia services over the IP network requires a managed differentiated service that adopts a prioritized treatment of packets. This incurs a need for a differentiated pricing scheme for the packets that receive different level of quality of service. This work proposes an analytic framework about packet pricing scheme for these services, and investigate the effect of service differentiation to the packet price for each class. Via numerical experiment, we validate our argument and illustrate the implication of the work.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권2호
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• pp.680-699
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• 2015

The use of web service has been increased rapidly, with an increase in the number of available services, finding the exact service is the challenging task. Service discovery is the most significant job to complete the service discoverers needs. In order to achieve the efficient service discovery, we focus on designing a cluster based service discovery model for service registering and service provisioning among all mobile nodes in a mobile ad hoc network (MANETs). A dynamic backbone of nodes (i.e. cluster heads) that forms a service repository to which MANET nodes can publish their services and/or send their service queries. The designed model is based on storing services with their service description on cluster head nodes that are found in accordance with the proposed cluster head election model. In addition to identifying and analyzing the system parameters for finding the effectiveness of our model, this paper studies the stability analysis of the network, overhead of the cluster, and bandwidth utilization and network traffic is evaluated using analytic derivations and experimental evaluation has been done.

• 한국산업정보학회논문지
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• 제11권5호
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• pp.119-131
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• 2006

This paper proposes a mathematical model for web site service quality evaluation, which first applies analytic hierarchy process(AHP) to determine the weights of evaluation indexes of web site service quality and then analyzes web site service synthetically by means of fuzzy methodology. In this case, experts' knowledge cannot only be used but its subjective component can be eliminated. Hence, the web site service quality can be analyzed and evaluated more reasonably. After establishing this model, the experiment results will be given, which verify the feasibility and validity of the proposed model. The model proposed here is very simple and easy to implement and can provide a useful way to help developers evaluate their web site service quality efficiently.

• 한국통신학회논문지
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• 제35권8B호
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• pp.1150-1158
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• 2010

At present multimedia service composed of voice, data, and video service is prevalent in the Internet. As such, wide-scale penetration of Internet service imposes tremendous pressure to the network infrastructure such as the media servers and links as well as the nodes. In addition, users from a large-scale population require broad bandwidth and high level of QoS. This requires a network with reliable and scalable services to customers, which also necessitates a realistic method for the design of the a media server. In this work, we explore the influence of user's behavior about delay on the performance of media server that takes into account the system and user attributes in a realistic manner. By incorporating user's behavior about the delay-sensitivity, we present an analytic framework for the evaluation of the performance of the media server, via which we illustrate a meaningful intuition in the provision of Internet multimedia service.

• 한국콘텐츠학회논문지
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• 제13권8호
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• pp.371-385
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• 2013

대학 도서관의 지식문헌정보서비스는 대학 교육 및 교수의 연구를 지원하는 중요한 역할을 수행하고 있다. 이에 따라, 서비스 품질요소를 계층적 관점에서 정의하고 이들의 중요성을 분석함으로써 대학 도서관의 서비스를 개선하기 위한 연구들이 선행되어 왔다. 그러나 기존 연구들은 서비스 품질을 구성하는 하위요소들 간의 상호 영향관계, 그리고 서비스 이용자와 제공자 두 집단간의 서비스 품질요인에 대한 인식차를 파악하여 서비스를 개선하는 측면에서는 연구가 미흡한 실정이다. 따라서 본 연구는 SERVQUAL의 관점을 바탕으로 도서관 서비스를 구성하는 서비스 품질요소 간 상관관계를 네트워크 모델로 도출하고, Analytic Network Process를 활용하여 서비스 이용자와 제공자 집단간의 서비스 품질요소에 대한 인식차이를 도출, 분석하였다. 그 결과 제공자는 요소들을 비교적 균일하게 중요하게 인식하지만 이용자는 특정 몇 가지 요소들을 중요하게 인식하는 것을 확인하였다. 도서관 서비스 품질요소들간의 상관관계와 집단간의 인식차이를 파악하는 본 연구의 접근방법은 추후 대학 도서관의 지식문헌서비스 경쟁력 확보에 기여할 것으로 기대된다.

• 한국컴퓨터정보학회논문지
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• 제27권10호
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• pp.245-254
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• 2022

본 연구는 기존 연구를 바탕으로 OTT 서비스에 대한 선택요인들을 도출하고, 각 평가 요소에 대한 가중치를 산출하기 위하여 AHP 분석모형을 제시하였다. OTT 서비스 선택요인들을 평가하기 위해서 OTT 서비스를 이용하는 고객들을 대상으로 수집된 자료를 분석에 활용하였다. 본 연구의 결과, OTT 서비스의 1단계 선택요인들인 경제성, 시스템 우수성, 편의성, 다양성, 유희성, 응대성 중에서 다양성이 가장 중요한 요인으로 나타났다. 1단계 요인과 2단계 요인의 가중치를 종합화한 결과에서는 오락이 가장 중요한 요인으로 나타났다. 마지막으로 본 연구는 성별, 연령에 따라 OTT 서비스 1단계 선택요인의 가중치에 차이가 있는지 분석했다. 본 연구를 통해서 소비자들이 OTT 서비스를 이용할 때 어떤 요인을 중요하게 고려하는지를 파악할 수 있을 것이다.

• 한국통신학회논문지
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• 제34권3B호
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• pp.288-303
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• 2009

In the near future it is foreseen that a genuine multimedia service over the WiMAX system is provided in a worldwide manner by exploiting the QoS technologies introduced in the wireless and wired broadband network. In this work we propose a pricing scheme for the multimedia service over the generic WiMAX system that supports a full QoS functionality. We assume real-time services such as the voice and video as well as the nonreal-time service such as the conventional high-speed data, and we propose a pricing and charging scheme for those services by investigating the inherent characteristics of those services and the multiple-class of QoS-service provided to them. After that we propose a method to compute expected revenue that is obtained from the WiMAX system by using an analytic method to estimate the usage of the bandwidth resources for the different class of services. Via numerical experiment, we verify the implication of the work.