Patent ID: 8700025
Filing Date: 2014-04-15
Classification: H04W

Abstract:
1. A user apparatus used in a mobile communications system, wherein the mobile communications system includes a radio base station and a remote radio apparatus connected with a high-speed transmission medium to the radio base station, the user apparatus comprising: a received level measuring unit which measures received levels of a signal transmitted from the radio base station and received levels of a signal transmitted from the remote radio apparatus and detects a change in relative magnitudes of measured values; a path loss measuring unit which measures a path loss between the user apparatus and the radio base station and a path loss between the user apparatus and the remote radio apparatus and detects a change in relative magnitudes of measured values; and a transmitter which transmits a report signal which shows that a predetermined event has occurred, wherein the predetermined event occurs if the relative magnitudes of the received levels are reversed and if the relative magnitudes of the path losses are reversed, wherein where radio downlink is connected to is switched between the radio base station and the remote radio apparatus if the predetermined event related to a received level occurs, and wherein where an uplink radio signal is connected to is switched between the radio base station and the remote radio apparatus if the predetermined event related to a path loss occurs.