公开(公告)号：US20180027431A1

公开(公告)日：2018-01-25

申请号：US15546186

申请日：2015-04-23

Applicant: SOLiD, INC.

Inventor： Youngman CHO ,  Doyoon KIM ,  Jinhwa KU ,  Hyoungho KIM

IPC: H04W24/04 ,  H04B17/336

Abstract: The present invention provides a distributed antenna system for automatically detecting an abnormally operating node unit. According to an embodiment of the present invention, a node unit of the distributed antenna system includes a signal input unit configured to receive and output first through n-th state information from n other node units connected to the node unit, where n is a natural number greater than or equal to 2; and a controller configured to analyze the first through n-th state information and to determine states of uplink signals respectively corresponding to the first through n-th state information. Each of the n other node units may analyze a signal received through a service antenna and generate the state information.