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1. (WO2017038288) SIGNAL SECURITY SYSTEM

Pub. No.:    WO/2017/038288    International Application No.:    PCT/JP2016/071470
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Jul 23 01:59:59 CEST 2016
IPC: B61L 11/00
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: MAEKAWA Keiji
前川 景示
KATSUTA Keiichi
勝田 敬一
IMAMOTO Kenji
今本 健二
SHIBATA Naoki
柴田 直樹
NAKANISHI Yusuke
中西 佑介
NISHINO Takayoshi
西野 尊善
TANI Hiroyuki
谷 浩行
Title: SIGNAL SECURITY SYSTEM
Abstract:
If a system is configured such that ground security devices are eliminated and the information required for control is circulated among trains and points in order to reduce costs, the time required for circulating a telegram increases with the increasing number of trains and points. This results in a delay in updating the control of points and the permission for trains to travel, and causes the problem of an increase in the distance between the trains. Control information is stored on a data server, and, in the updating of control information, points and trains update the control information on the data server. The points and the trains also refer to the control information on the data server where necessary. Furthermore, in order to eliminate write conflicts in the updating of control information, a region where a write request for each device can be established is created on the data server. In writing, write conflicts are avoided by ensuring that there is no write request of another device, and then performing the writing. Thus, each device is capable of updating and referring to control information at an optional timing without waiting for a telegram circular, thereby allowing accelerated updating of control information.