首页>
外国专利>
ON-VEHICLE DEVICE FOR NARROW AREA COMMUNICATION OF HIGH- LEVEL ROAD TRAFFIC SYSTEM
ON-VEHICLE DEVICE FOR NARROW AREA COMMUNICATION OF HIGH- LEVEL ROAD TRAFFIC SYSTEM
展开▼
机译:高等级公路交通系统窄区域通信的车载设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To provide an on-vehicle device for narrow area communication of high-level road traffic system capable of fixing a desirable communication frequency with high efficiency and reliability.;SOLUTION: A frequency switching determination means 7 is provided, whereby: a priority sequence for switching local frequencies in correspondence with types of on-road equipment is previously set; a plurality of local frequencies are sequentially outputted at a predetermined cycle in accordance with the priority sequence; a received frequency signal based on a received frequency is compared with a selected frequency signal; and a local frequency outputted from a PLL oscillating unit 6 is fixed, when the received frequency signal is the same as the selected frequency signal.;COPYRIGHT: (C)2003,JPO
展开▼