)LTE-R 및 PS-LTE 공존 환경에서의 간섭 분석 및 RAN Sharing 기반 성능 개선 연구

초록

South Korea is pursuing a public wireless communication network policy that integrates PS-LTE, LTE-R, and LTE-M based on 700MHz LTE. LTE-R has been deployed starting from the Wonju？Gangneung section in 2017, with the goal of covering all railway lines by 2027. LTE-R (UL 718？728MHz, DL 773？783MHz) shares the same frequency band as PS-LTE, which can cause Co-Channel Interference (CCI), directly affecting the reliability of railway communications. This paper verifies the improvement of RSRP (Reference Signal Received Power (RSRP) and connection stability when RAN Sharing(Radio Access Network Sharing(RAN) sharing is applied through experiments conducted on the Osong test line. FurthermoreFurthermore, the implications of the proposed interference mitigation approach for future FRMCS/5G-R systems are discussed. The results demonstrate that MOCN-based RAN sSharing can effectively mitigate interference and improve service continuity in shared-frequency railway communication environments.

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