Ground apparatus and ground apparatus system for train platform door opening and closing synchronization through ground apparatus communication networking

Abstract

In a ground apparatus system, polling communication where a ground apparatus serves as a primary station and a train serves as a secondary station is performed. A ground apparatus that is a ground apparatus of the ground apparatus system and is capable of communicating with a platform screen door control apparatus performs polling communication at a first communication frequency to obtain train location information from the train. When the train reaches an impending arrival range including a stop position at a station, the ground apparatus switches the communication frequency to a second communication frequency higher than the first communication frequency. The apparatus then transmits, to the train through polling communication, synchronized opening and closing control instruction information received from the platform screen door control apparatus, and transmits, to the platform screen door control apparatus, train state information obtained from the train through polling communication.