Electronics and Telecommunications Research Institute

Choon Sik Yim

Cheol Sig Pyo

Jae Ick Choi

Soon Ik Jeon

Soon Young Eom

Sung Soo Kang

Provided are an integrated switch and a switching method for simultaneously processing IP data and voice signals using silent periods during communication. The integrated switch provides a function of transmitting data packets using the silent periods during the communication of an existing switch subscriber, so that an existing frequency band and apparatus can be used without use of a separate frequency band and a separate apparatus for data transmission such as an existing asymmetric digital subscriber line (ADSL). In addition, efficiency of an existing switch can be increased without use of an apparatus for collecting and processing data provided in front of subscriber line cards.

Integrated switch and switching method for simultaneously processing voice and IP data in the same channel

This invention relates to a structure of an active antenna system of a mobile and a satellite navigation method using the system. The present invention provides a structure of an active antenna system of a mobile and a satellite tracking method using the system, in which beams are formed and then directed by using sub-array concept, the tracking accuracy becomes to high by using double beam satellite tracking mode for tracking the satellite, tracking loss is reduced and positions are more accurately tracked during movement using an absolute steering sensing mode.

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Daejeon, South Korea

Choon Sik Yim