KT Successfully Develops 'Time Synchronization Technology' to Counter Jamming Attacks
Published2017.11.07 16:44KT announced that it has successfully developed and demonstrated 'IP-based time synchronization technology' with Ericsson for the first time to provide stable communication services even under jamming attacks.
Generally, a synchronization process that aligns transmission time is essential for transmitting highly reliable data between base stations.
Most base station equipment receives time information from GPS (Global Positioning System) to synchronize time, but when subjected to jamming attacks, strong interference waves prevent the equipment from receiving GPS information, and time synchronization-based communication services are temporarily disrupted.
The IP-based time synchronization technology developed by KT and Ericsson can synchronize time between base stations without GPS information. This technology receives time information from a 'GM (Grand Master) server' via wired network when GPS failure occurs, corrects time errors between base stations, and enables communication.
KT simulated GPS failure conditions at Ericsson Lab in Stockholm, Sweden, and confirmed that the IP-based time synchronization technology corrects time errors and enables stable data transmission even when time information between base stations is corrupted.
KT explained that by utilizing this technology, even under jamming attacks, eMBMS (evolved Multimedia Broadcast Multicast Service) service is possible, which transmits data to multiple subscribers simultaneously in a single data transmission like radio, allowing disaster information to be viewed in video without interruption even in crowded situations.
Kim Young-sik, Executive Managing Director of KT INS Headquarters, stated, "Through this technology collaboration with Ericsson, KT has secured a foundation to provide high-quality services without disruption even in the face of North Korea's GPS jamming provocations," and added, "KT will further strengthen the LTE technology leadership it has maintained so far."
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