Nnsp Co., Ltd.

Korea District Heating Corporation

Eun Sung Na

Ki-Hyun Kim

Sang-Jin Lee

Il-Yong Kim

Sun-Jin Kim

The present invention provides a reception apparatus for performing security tunneling and data re-transmission and unidirectionally receiving data from a transmission apparatus and a transmission apparatus for unidirectionally transmitting data to the reception apparatus. When the reception apparatus checks that there is an error in received data, the reception apparatus performs a switching operation or transmits a switching request signal to the transmission apparatus to notify of the error of the received data to the transmission apparatus. When the transmission apparatus has detected the switching, the transmission apparatus re-transmits data, in which an error is generated, to the reception apparatus. The transmission apparatus encrypts the data and transmits the encrypted data to the reception apparatus. According to the present invention, reliability and security of one-unidirectional data communication are improved.

Transmission/reception apparatus of security gateway for physical unidirectional communication performing security tunneling and data re-transmission, and data transmission method using same

The present invention provides a reception apparatus for receiving data from a transmission apparatus in one direction, and a transmission apparatus for transmitting data with regards to the reception apparatus in one direction. If the reception apparatus detects an error in the received data, the reception apparatus informs the transmission apparatus about the error in the received data by switching over one or more communication lines forming a connection with the transmission apparatus. If the transmission apparatus detects a switchover of the one or more communication lines, the transmission apparatus re-transmits the data in which the error occurred to the reception apparatus. According to the present invention, the occurrence of data errors in one-direction data communication is easily recognized, and the reliability of the one-direction data communication is improved.

One-direction data transmission/reception apparatus that re-transmits data via plurality of communication lines, and data transmission method using same

Growing community of inventors

Yongin-si, South Korea

Eun Sung Na