• Title, Summary, Keyword: Rail Stability

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A study on the reliability and availability improvement of wireless communication in the LTE-R (철도통합무선망(LTE-R) 환경에서 무선통신 안정성과 가용성 향상을 위한 방안 연구)

  • Choi, Min-Suk;Oh, Sang-Chul;Lee, Sook-Jin;Yoon, Byung-Sik;Kim, Dong-Joon;Sung, Dong-Il
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.9
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    • pp.1172-1179
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    • 2020
  • With the establishment of the railway integrated radio network (LTE-R) environment, radio-based train control transmission and reception and various forms of service are provided. The smooth delivery of these services requires improved performance in a highly reliable and available wireless environment. This paper measured the LTE-R radio communication environment to improve radio communication performance of railway integrated wireless network reliability and availability, analyzed the results, and established the wireless environment model. Based on the built-up model, we also proposed an improved radio-access algorithm to control trains for improved reliability, suggesting a way to improve stability for handover that occur during open-air operation, and proposed an algorithm for frequency auto-heating to improve availability. For simulation, data were collected from the Korea Rail Network Authority (Daejeon), Manjong-Gangneung KTX route, which can measure the actual data of LTE-R wireless environment, and the results of the simulation show performance improvement through algorithm.