LTE 기반의 철도무선통신망과 국가재난안전통신망 공동구축에 따른 전파간섭 분석 및 공존방안 연구

This paper studies co-channel interference issues caused by the joint deployment of the long-term evolution (LTE)-based railroad radio communication network (LTE-R) and the national disaster public safety communication network (PS-LTE). First, we examine the co-channel interference scenarios that occur when LTE-R and PS-LTE are jointly deployed in the same area, and investigate the application of the interference mitigation techniques defined in the LTE standard specifications. Radio access network sharing (RAN-Sharing), intercell interference coordination (ICIC), and coordinated multipoint (CoMP) solutions are applied to mitigate radio interference between LTE-R and PS-LTE and improve coexistence. We demonstrate user throughput performance under LTE-R and PS-LTE co-deployment environments through system-level-simulator (SLS) and verify how coexistence improves when RAN-Sharing, ICIC and CoMP are applied for interference mitigation.