SKT Successfully Demonstrates 5G Communication Using 3.5GHz Frequency Band
Published2017.06.28 11:46SK Telecom announced that it has successfully demonstrated 5G communication using the 3.5GHz frequency band in collaboration with Samsung Electronics and Nokia. The 3.5GHz band is considered the optimal frequency band for 5G communication, enabling gigabit-level speeds while providing wide radio wave propagation range.
Global ICT operators have focused on securing 5G technology centered on ultra-high frequencies (millimeter waves) such as 28GHz. However, ultra-high frequency bands have the advantage of enabling large-capacity data transmission utilizing wide bandwidth, but have the limitation of relatively short radio wave propagation distance. Accordingly, countries around the world including China and Japan have been working to secure low-frequency (frequency bands below 6GHz) 5G technology that can implement gigabit-level speeds while expanding coverage.
SK Telecom has focused on securing 3.5GHz communication technology, the nation's 5G low-frequency band, and successfully demonstrated communication in this band with Samsung Electronics and Nokia.
For this demonstration, SK Telecom jointly developed base station equipment, test terminals, and virtualized core equipment capable of utilizing the 3.5GHz frequency band with Samsung Electronics based on the 5G standard specifications (New Radio Specification) agreed upon to date by 3GPP.
The two companies successfully demonstrated 3.5GHz communication in a research laboratory at Samsung Electronics' Suwon business site in Gyeonggi Province, utilizing technologies compliant with 5G standards including ▲60KHz subcarrier spacing, which is 4 times that of existing LTE ▲channel coding technology that minimizes data loss (LDPC coding) ▲ultra-low latency communication technology (Self-Contained Subframe).
Additionally, SK Telecom jointly developed 3.5GHz band 5G base station equipment and test terminals with Nokia, and achieved gigabit (Gbps)-level speeds in outdoor demonstrations conducted near its Bundang headquarters. The two companies introduced carrier aggregation technology to expand bandwidth and secured important field measurement data for future 3.5GHz network construction by measuring service speed and quality during mobility.
SK Telecom plans to continuously secure 5G core technologies for 3.5GHz band commercialization including speed improvement, coverage expansion, and communication stability during mobility together with Samsung Electronics and Nokia. Additionally, the company plans to strengthen activities to reflect the communication technology demonstrated this time in international standardization bodies such as 3GPP as standard specifications.
Park Jin-hyo, Head of Network Technology at SK Telecom, emphasized that "with the successful demonstration of the 3.5GHz band, we have secured all frequency band communication technologies for 5G commercialization," and "we will continue SK Telecom's global 5G leadership by taking the lead not only in improving 5G technology by band but also in service interoperability and standardization."
Related news
SKT Obtains Information Security Management System Certification for Intelligent CCTV
SK Telecom announced that its intelligent video service 'T view' has obtained Information Security Management System (ISMS) certification as the first domestic intelligent CCTV service to do so. 'ISMS' is Korea's premier comprehensive information security certification system, managed by the Ministry of Science, ICT and Future Planning, with certification operations run by the Korea Internet & Security Agency (KISA), and certification bodies including the Korea Information and Communications Industry Association (KAIT) and Telecommunications Technology Association (TTA) participating as evaluation agencies. SK Telecom's 'T view' is an intelligent video service that provides video monitoring functions such as real-time intrusion detection and people counting within designated areas, as well as automatic video enhancement during adverse weather or darkness, camera tampering detection, and cloud storage after video encryption.
2017.06.19by 김지혜 기자
SKT, When Your Eyes Get Tired and You Can't See the Securities Trading Board, Just 'Listen'
An 'artificial intelligence (AI) securities trading service' is being introduced that allows you to learn in a single voice command everything from the securities with the highest trading volume today to those with the highest rate of increase, as well as the stocks most frequently bought (sold) by foreigners (institutions). SK Telecom and Samsung Securities signed a memorandum of understanding on the 'AI voice financial service' provision at SK Telecom's T Tower on Eulji-ro on the 21st, and announced plans to launch the related service in the third quarter. The AI securities service utilizes the AI device 'Nugu' to enable not only stock price inquiries for pre-registered stocks of interest but also ▲guidance on domestic and international stock indices and market information ▲recommendations of stocks and funds ▲connection to Samsung Securities customer service calls, and more. Users can register up to 10 stocks of interest, and the service will provide individual stock prices for stocks of interest as well as rising and falling stocks and the rate of increase for stocks of interest.
2017.06.21by 김자영 기자
SKT, meet us at Yeonpyeong Island, a cutting-edge ICT experience center.
SK Telecom's mobile ICT experience center 'T.um mobile' will visit Yeonpyeong Island, located at the westernmost front line, in commemoration of the Month of Patriots and Veterans. SK Telecom announced that it will operate 'T.um mobile' at Yeonpyeong Elementary, Middle and High School in Incheon for four days starting from the 28th, marking the 15th anniversary of the Second Yeonpyeong Naval Battle on June 29th. SK Telecom will showcase coding, Internet of Things (IoT), Augmented Reality (AR), Virtual Reality (VR), and hologram technologies to approximately 2,000 people including 133 students from all grades at Yeonpyeong Elementary, Middle and High School as well as residents and military personnel in the Yeonpyeong Island area.
2017.06.23by 김지혜 기자
European Patent Applications Surpass 200,000 for the First Time… South Korea Maintains 5th Place, Led by Batteries and Telecommunications
According to the European Patent Office (EPO)'s 'Technology Dashboard 2025', European patent applications last year reached 201,974, surpassing 200,000 for the first time. Korean companies and inventors filed 14,355 applications, representing a 9.5% increase from the previous year and maintaining 5th place by country. Battery, digital communication, and semiconductor technologies led the growth, with Samsung ranking as the top EPO applicant for the second consecutive year and LG reaching 3rd place. The presence of major domestic cities such as Seoul, Suwon, and Yongin was also confirmed. It was also revealed that Korea's European patent strategy is expanding beyond individual technologies to span the entire industry.
2026.03.24by 명세환 기자
SK Telecom First Applies AI-Based Network Operations at Gwanghwamun K-Pop Concert
SK Telecom announced that it applied an AI-based network operation system for the first time at a large-scale K-pop concert held in the Gwanghwamun area of Seoul on March 21st, managing communication quality throughout the event. Mobile data usage during the three hours before and after the concert reached 12.15TB, approximately doubling compared to the same time slot the previous weekend. SK Telecom monitored traffic using the AI system 'A-One' in five-minute and 50-meter units to respond to potential overload situations, while also operating temporary communication facilities and on-site personnel in parallel. This case is interpreted as confirmation of the practical applicability of AI-based autonomous network operation in an environment where demand from dense events and foreign users increases simultaneously.
2026.03.23by 명세환 기자
