AN IN-BUILDING MOBILE COMMUNICATION RELAY SYSTEM WITH MULTI-INTERFACE

摘要

A building inside mobile radio communications relay system having a multiplex interface is provided to use a link system between 'apparatuses sending and receive the mobile communications signal in the building inside by equipping UTP(untwisted paired) and optical cable interface. An IMS(In-building Master System)(202) converts the digital light or the radio frequency signal received from a base station or an RF(Radio Frequency) relay into the digital signal. The inputted digital signal is converted into the digital light or the radio frequency signal and transmits to the base station or the RF relay. An IRTS(In-building Remote Terminal System)(206) outputs the RF signal which is transmitted from the mobile communication terminal and outputs the digital signal through a wireless antenna. An IHS(In-building Hub System)(204) relays the digital signal between IMS and IRTS.