• 한국IT서비스학회:학술대회논문집
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• 2003.05a
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• pp.117-123
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• 2003

인터넷 접속채널과 접속망이 다양해지고 채널활용이 다차원적으로 가능함에 따라 유무선의 다중 채널통합에 대한 관심이 고조되고 있다. 이는 유무선 인터넷 채널통합에 관한 방향이 필요하며, 유선과 무선인터넷의 채널통합 이슈에 대한 분석이 필요한 시점이라 할 수 있다. 본 연구에서는 유무선 인터넷 채널통합과 관련된 문제점 및 이슈를 분류하였으며, 유무선 채널통합을 크게 Interface 통합관점과Business Model 간의 통합관점으로 살펴보았다. 인터페이스 관점에서는 디스플레이, 입출력장치, 컨텐츠로 구분하여 채널통합 문제를 유형별로 분류하였다. 그리고 비즈니스 모델 관점에서는 무선인터넷 서비스 유형 및 특성을 분석하여 비즈니스의 채널통합 방향성을 제시하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.184-186
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• 2004

유선 네트워크와 애드 혹 무선 네트워크의 기본적인 차이점인 제한적 대역폭, 파워 등으로 인해 두 네트워크 사이에 멀티캐스트를 하고자 할 때, 한 멀티캐스트 프로토콜을 다른 네트워크에 적용 시키는 것은 비효율적이다. 서로 다른 네트워크 환경의 멀티캐스트를 통합하기 위한 방안으로 몇 가지 멀티캐스트 게이트웨이가 연구되었다. 기존의 멀티캐스트 게이트웨이는 멀티캐스트 그룹에 참여하기를 원하는 노드가 다른 환경의 멀티캐스트 그룹에 참여할 때마다 컨트롤 메시지의 전환이나, 패킷 헤더의 변경을 요구한다. 이와 달리, 본 논문에서 제안하는 멀티캐스트 게이트웨이는 애드 혹 노드가 유선 네트워크의 오버레이 멀티캐스트 그룹에 참여하고자 할 때에는 애드 혹 수신자 노드의 대리 송신자 역할을 하며, 반대로 유선 네트워크 노드가 애드 혹 멀티캐스트 그룹에 참여하고자 할 때에는 유선 네트워크 수신자 노드의 대리 송신자 역할을 담당한다. 따라서 애드 혹 네트워크의 노드가 직접 오버레이 멀티캐스트 그룹에 참여할 때 또는 오버레이 네트워크의 노드가 직접 애드 혹 멀티캐스트 그룹에 참여할 때 복잡한 멀티캐스트 프로토콜의 전환 과정을 생략할 수 있고, 투명성을 제공할 수 있다.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.181-187
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• 2011

Since 2003, state transportation study core technology development is being promoted as part of the bimodal trams operating in accordance with the development of refractive vehicle as research infrastructure for building high-tech road transport system has been the research and development. Bimodal trams of refraction as the vehicle for him to introduce domestic first ever operation management system also developed in Korea according to case-based technology system, but most of the country, and, in this study, mainly those based on technology integration building management system and the bimodal trams of refraction of a vehicle operated was to highlight the features and benefits. Bimodal tram station itself is the way the exclusive properties and to operate the route with large transport capacity has the characteristics of the railway, but the only routes such as railroad lines is not of closed roads under certain circumstances, the flexibility to use has to be integrated operations management system of bimodal trams characteristics of the railroads and public transportation by combining the characteristics of a flexible, convenient and secure services to users with the aim of providing research and will denote the system developed. In this study, bimodal integration system required for the operation of the tram station around the wired and wireless network management center, applying the organic integration into one system so that you have to be centrally managed. In addition, the existing traffic management system operates as a unidirectional rather than monitoring all system-wide management via the interactive network through real-time requests and responses were configured to allow management and control. These findings of the existing traffic operation management system that you can jump step can be based on future unmanned vehicles and related systems through control of the operation management system will be offered as a basis.

• Journal of information and communication convergence engineering
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• v.3 no.3
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• pp.157-162
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• 2005

Web services are key applications in business­to-business, business-to-customer, and enterprise applications integration solutions. As the mobile internet becomes one of the main methods for information delivery, mobile Web Services are regarded as a critical aspect of e-business architecture. In this paper, we proposed a mobile Web Services middleware that converts conventional internet services into mobile Web services. We implemented a WSDL (Web Service Description Language) builder that converts HTML/XML into WSDL and a SAOP (Simple Object Access Protocol) message processor that performs SOAP message handling, chain and handling of server requests. The former minimizes the overhead cost of rebuilding mobile Web Services and enables seamless services between wired and wireless internet services. The latter enhances SOAP processing performance by eliminating the Servlet container (Tomcat), a required component of typical Web services implementation. Our main contributions are to overcome the latency problem of current Web Services and to provide an easy mobile Web service implementation. Our system can completely support standard Web Services protocol, minimizing communication overhead, message processing time, and server overload. Finally we compare our empirical results with those of typical Web Services.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.7A
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• pp.1064-1073
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• 1999

In the integrated systems of wired and wireless networks, it is not fit to separate cellular networks to intelligent networks so IMT-2000 is basically developed including the intelligent networks. But it is not yet determined how functional entities of IMT-2000 map the corresponding physical entities. In this paper, we propose the integrated model by mapping various functional entities of IMT-2000 into the corresponding physical entities. Also, we proposs the call model for the mobile call setup and IN service call. Based on the proposed model, we evaluate the performance and compare with IMT-2000 in terms of the mean service delay and processing delay at each physical entities.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.5
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• pp.1198-1206
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• 2011

In this paper, we proposed a home network integrated dimmer switch using Z-wave Mesh Network. The dimmer switch come with wired and wireless network-based intelligent lighting switch that can be installed in a apartments with home network technologies. This switch is ease to install and operate. Furthermore, it provide power saving through efficient control of light using motion detect sensor and light intensity sensor. In order to evaluate the performance of our developed home network integrated dimmer switch, we performed a load performance test and from our result, it showed excellent performance in terms of lighting control and communication speed.

• Journal of Internet Computing and Services
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• v.7 no.5
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• pp.43-57
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• 2006

Next-generation mobile communication systems evolve in the form of high speed data transmission along with integration of wired-wireless network. Therefore, it needs researches on integrating service to heterogeneous networks to offer high speed data transmission and various services while supporting user mobility. In existing studies, heterogeneous networks are linked to single core network separatively, Since vertical handoff between heterogeneous networks leads to some delay, packets may be lost during vertical handoff. To solve this problem, this paper proposes an hierarchically integrated network architecture considering the characteristics of CDMA2000, WiBro, and WLAN. The hierarchically integrated networks are overlaid according to coverage of each network. Therefore, the proposed architecture can minimize handoff delay and packet loss. In addition, this paper proposes an integrated framework for next generation mobile communication networks.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.10C
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• pp.764-777
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• 2008

In 4G environments, which is the next generation technology for mobile network, it is forecasted that the wireless Internet using a mobile devices such as a mobile phone, PDA will increase because of expansion of Internet and integration of heterogeneous networks. Therefore, we need a Digital ID management technology that can prevent illegal uses and manage private information efficiently in wired and wireless environments. In this paper, we analyze various Digital ID management technologies, and then define requirements of user-centric Digital ID management technology. In addition, we newly propose the authentication mechanism for mobile applications in LTE/SAE network. Finally, we propose the mobile Digital ID Wallet mechanism suitable for 4G environments.

• International Commerce and Information Review
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• v.16 no.4
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• pp.55-75
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• 2014

Non-parametric method such as technology efficiency, DEA/Window model and Malmquist Productivity Index (MPI) are used to measure efficiency and productivity of ICT (Information and Communication Technology) manufacturing industry and service industry over the period 2007-2011. The results of this paper indicate following: (1) Technology efficiency of the ICT manufacturing industry were found as the range of 0.34 and 0.39 over the sample period. Technology efficiency of the ICT service industry were found as the range of 0.16 and 0.20 over the sample period. (2) The geometric average of the Malmquist TFP indexes on ICT manufacturing industry indicated the productivity improvement an average of 8.3 percent. The geometric average of the Malmquist TFP indexes on ICT service industry indicated the productivity improvement an average of 1.6 percent. (3) TIER analysis result on ICT manufacturing industry showed that optimal bench marking made by storage devices${\rightarrow}$wireless communication equipment${\rightarrow}$broadcasting equipment${\rightarrow}$radio, recording and playback devices${\rightarrow}$computers, printers, video and audio-visual equipment path. TIER analysis result on ICT service industry indicated that optimal bench marking made by computers and packaged software${\rightarrow}$wired communication${\rightarrow}$communication, information, detection equipment${\rightarrow}$consulting and construction for computer systems integration${\rightarrow}$industrial machinery and equipment rental${\rightarrow}$telecommunications reseller${\rightarrow}$system software development and delivery${\rightarrow}$hosting path.

• Journal of the Korea Society of Computer and Information
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• v.19 no.10
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• pp.107-115
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• 2014

In recent years, large companies and public institutions in the Smartphone business purposes has been used a lot. Personal Smartphone are worried about security of personal information only. But if you are a corporate or business purposes requires a more cautious approach. It can destroy an organization's network to hack Smartphones have very serious damage. For this purpose, the existing solution, and try to solve security issues with MDM or MAM. However, Smartphone users discomfort and there is a limit of organizational control. In this paper, we can propose with these issues more broadly would like to suggest. Secure mobile traffic management system enables companies or agencies the ease for users to use a Smartphone. And, for organizations that provide smart phones are more powerful and can provide a means of control. In addition, wired/wireless integration and security measures that can provide new services to offer.