Performance Test of LTE-R Railway Wireless Communication at High-Speed (350 km/h) Environments

LTE-Railway (LTE-R) is a communication technology that enables immediate and effective response in case of emergencies by providing voice, data, and video services through LTE, a 4thgeneration wireless communication technology, optimized for the railway environment. LTE-R, which is currently under development in South Korea, provides the capability to send and receive data for group calls and emergency calls, as well as internal control calls on trains linked to smartphones. However, infrastructure construction and technical services are required to ensure seamless services as well as the quality of service (QoS) in a high-speed moving environment. The Telecommunications Technology Association (TTA) has established the LTE-R wireless communication standard to support these requirements; however, verification of the established data standard is necessary in an actual high-speed rail environment to ensure its reliability. This study measures the QoS through a mobile terminal in the LTE-R infrastructure network constructed by the Korea Railroad Research Institute in a high-speed moving environment (300 km/h to 350 km/h). The measurement results will be used as reference materials for LTE-R construction and research.