• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.10
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• pp.57-66
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• 2010

Today the various types of communication and application service are provided by the development of Internet and IP technologies. It is expected to be extended the service domain of two networks through the interconnecting P2PSIP overlay which is highlighted as an important technologies for Internet based services and IMS(IP Multimedia Subsystem) which is the new architecture adopted in the evolution of NGN. Therefore, this paper explains the possible methods of the service expansion with interconnecting P2PSIP overlay and IMS network. Specially this paper suggests the interconnection architectures of P2PSIP overlay and IMS network as subscriber's types and analyzes the traffic analysis model and session set up delay characteristics by simulation model. As a results, this paper shows that the interconnection architecture using gateway AS(Application Server) is the excellent method to interconnect the IMS in case of P2PSIP overlay only subscriber, and that interconnection architecture using I-CSCF is good method to interconnect the IMS in case of P2PSIP overlay and IMS subscriber.

• Journal of Internet Computing and Services
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• v.5 no.3
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• pp.35-43
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• 2004

In packet switching using multistage interconnection networks (MIN's), it is generally assumed that the packet movements successively propagate from the last stage to the first stage in one network cycle. However, Ding and Bhuyan has shown that the network performance can be significantly improved if the packet movements are confined within each pair of adjacent stages using small clock cycles. In this paper, an analytical model for evaluating the performance of input-buffered MlN's employing this network cycle approach is proposed, The effectiveness of the proposed model is confirmed by comparing results from the simulation as well as from Ding and Bhuyan model.

• Journal of Internet Computing and Services
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• v.5 no.1
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• pp.41-49
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• 2004

Analytical performance evaluation is crucial for justifying the merit of the design of Multistage Interconnection Networks(MINs) in different operational conditions. While several analytical models have been proposed for the performance evaluation of MlNs, they are mainly for uniform traffics. Even the models for nonuniform traffics have various shortcomings. In this paper, an accurate model for the performance evaluation of multi buffered banyan-type MIN's under nonuniform traffic condition is obtained. The accuracy of proposed models are conformed by comparing with the results from simulation.

• Journal of Internet Computing and Services
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• v.4 no.5
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• pp.43-49
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• 2003

Analytical performance evaluation is crucial for justifying the merit of the design in different operational conditions. While several analytical models have been proposed for the performance evaluation of Multistage Interconnection Networks(MINs), they are mainly for uniform traffics. Even models for nonuniform traffics have several shortcomings such as they only consider output buffered structure or do not consider blocking conditions. In this paper the mere accurate models than any other ones so far have been proposed for the performance evaluation of banyan-type MIN's under nonuniform traffic condition is obtained. The accuracy of proposed model is conformed by comparing with the results from simulation.

• Journal of Internet Computing and Services
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• v.5 no.5
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• pp.61-68
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• 2004

In this paper, a more accurate model than any other ones so far have been proposed for the performance evaluation of muntibuffered banyan-type Multistage Interconnection Networks(MINs)'s under nonuniform traffic condition is obtained. Small clock cycle instead of big clock cycle is used to improve the performance. The accuracy of the proposed model is conformed by comparing with the results from simulation.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.185-185
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• 2004

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2001.11a
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• pp.31-32
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• 2001

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.6
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• pp.17-22
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• 2013

Heterogeneous radios are used in disaster management agencies for a variety of reasons though the radio must have the same radio frequency and protocol for voice communication. For this reason, the variety of heterogeneous radio voice connection methods have been studied but these are simple analog voice line cross connection or partial networked based on digitalization. In this paper, we suggest the method of voice packet transmission method based on All-IP per radio through IP network using SIP/RTP for scalability and openness and developed a prototype of the proposed method was verified.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.10
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• pp.1190-1196
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• 2016

In this paper, a cross-layer interworking scheme for different protocols is proposed to provide an efficient internet services in very small aperture terminal (VSAT) based satellite communication systems. In addition, we implement the proposed interworking model and prove the feasibility of the proposed system. VSAT based satellite communication systems commonly use digital video broadcasting (DVB)-S2 standard. Unfortunately, DVB-S2 has inefficient parts to support IP based internet services because it has originally been designed to support broadcasting services. Generic stream encapsulation (GSE) protocol, which is a layer 2 protocol, has been proposed to mitigate this inefficiency. We propose a cross-layer interworking scheme to cooperate efficiently between IP and GSE protocols and between GSE protocol and DVB-S2, respectively. In addtion, we implement the proposed interworking schemes via computer softwares and prove the feasibility using NI-USRP and commercial DVB receiver.

• The Transactions of the Korea Information Processing Society
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• v.5 no.11
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• pp.2862-2873
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• 1998

In the integrated development environments for automatic generation of Java applets and applications tat can be used as Internet and Intranet-based client-server programs, it is essential to interconnect between the function components such as main window, project manager, object inspector, source code editor, and form designer. This paper describes the function components related with the generation of mobile code based client-server program. In then designs and implements a data structure, named 'JCode', for interconnection between the function components. Finally, it discusses the action principles of Two-Way Access technique based on JCode. By applying the proposed JCode based interconnection technique, user can program efficiently using the function components.