Electronics and Telecommunications Research Institute

Moon Kyun Oh

Mi S Han

Dongsoo Lee

Young Sun Kim

Hark Yoo

Geun Yong Kim

Kwon Chul Park

Seong Soon Joo

No Ik Park

Seung Hee Kim

Jae In Kim

Hee Do Kim

Hyun Woo Oh

Young Boo Kim

Sung Hyun Yun

Kyung Jun Park

Byung-Hee Son

Yong Mun Park

A terminal status monitoring apparatus connected to a terminal at an optical subscriber side in an optical network is provided. A signal transferring unit transfers a downlink optical signal to the terminal and receives, as a reflected optical signal, the downlink optical signal which is reflected at the terminal. A signal receiving unit measures an intensity of the reflected optical signal. A signal processing unit determines a connection status of a terminal device at the terminal by comparing an intensity of the downlink optical signal with the intensity of the reflected optical signal. A signal output unit outputs the connection status.

Apparatus and method for monitoring status of terminal

Provided are a system and a method for providing contents using an open API. A contents storing unit stores at least one contents. An open API unit is common to upper applications on the basis of a wired network interface and provides an API that is a communication function realized as components. A communication capability providing unit combines the API with the contents selected by the contents provider, and adds a communication function to the contents on the basis of usable network resources. The contents providing unit provides contents in which a communication function is added.

System and method for providing digital contents using open API

Provided are an apparatus and method for modeling and analyzing a network simulation for a salable simulation framework (SSF)-based network simulation package. A system logic set is generated and a network simulation modeling suitable for a predetermined network application is formed according to the system logic set. The network simulation modeling is transmitted to a predetermined network simulation package that performs simulation. Statistical information is generated based on the result according to the system logic set. Complicated network simulation modeling errors can be minimized, and remodeling of the network simulation modeling can be reduced.

Apparatus and method for modeling and analyzing network simulation for network simulation package

Frame relay interworking service control method with ATM network using a permanent virtual connection

A method of controlling a television broadcasting call in an ATM switching system in which a television broadcasting service as one of B-ISDN services can be provided through an ATM switching network. The provision of the television broadcasting call in the ATM switching system is not performed by previously connecting all information transmission paths between a broadcasting source and a viewer (subscriber) but by connecting information transmission paths of the nearest switching modules between the broadcasting source and the viewer according to a requirement of the viewer under the condition that a semi-permanent connection is made between the broadcasting source and the ATM switching system. Therefore, the processing capability of the ATM switching system can be enhanced. The present invention can basically realize various B-ISDN services in the future.

Method of controlling television broadcasting call in asynchronous

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Daejeon, South Korea

Moon Kyun Oh