통신기반 열차제어 시스템 CBTC(Communication Based Train Control) 구성 방안…

통신기반 열차제어 시스템 CBTC(Communication Based Train Control) 구성 방안 중 IL-CBTC(Inductive Loop-Communication Based Train Control)와 RF-CBTC(Radio Frequency-Communication Based Train Control)를 설명하시오.