Foreign tourists take photos on the 12th in front of a promotional display for BTS installed on the steps of Sejong Center in Jongno-gu, Seoul. Kwon Do-hyun

With the group BTS set to hold a comeback concert at Gwanghwamun on the 21st, telecom companies are moving busily.

According to industry sources on the 15th, the three telecom carriers have moved to secure service quality, including by expanding network capacity across the Gwanghwamun area, in preparation for hundreds of thousands of attendees on the day of the concert.

SK Telecom will for the first time operate its in-house AI-based network operations system A-ONE. The system can suggest optimal locations for new equipment and forecast future traffic based on past event data. On the day of the show, SK Telecom plans to use the system to monitor on-site traffic changes in real time and respond immediately to increases in concurrent users or equipment anomalies.

KT has significantly expanded network capacity around Gwanghwamun Square and City Hall Square, where the concert will take place. It has deployed six mobile base stations and newly built 79 radio base-station systems and 14 Wi-Fi systems to ensure stable service quality. On the day of the concert, it will also run an emergency duty system centered on the Gwacheon network control center, and it will deploy a total of more than 80 network specialists on site, including about 40 engineers.

LG Uplus will also activate a preemptive response system based on autonomous networking. It plans to add mobile base stations and temporary repeaters at around ten key nearby locations to support stable service quality. During the event, it plans to manage quality through an operations setup that links the site with the situation room.

According to police, up to 260,000 people, including 22,000 ticketed attendees, are expected to crowd Gwanghwamun Square and the Seoul City Hall area that day.