Title:
Communication device
Document Type and Number:
Japanese Patent JP6322972
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To avoid interference between range-finding light and information light, concerning a communication apparatus.SOLUTION: A communication system includes: an on-vehicle device to be mounted on an automobile; and a communication apparatus to be installed on a road. The communication apparatus transmits information by optical radio communication and the on-vehicle device receives the transmitted information. The communication apparatus inhibits light emission of information light IR, i.e. transmission of the information till a first inhibition period t1 elapses after the reception of range-finding light LR from the on-vehicle device. When the first prohibition period t1 elapses after the reception of the range-finding light LR from the on-vehicle device (S140: YES), the elapse time point of the first inhibition period t1 is set as a transmission timing then the information is transmitted by the light emission of the information light IR, i.e. optical radio communication (S160).
Inventors:
Toru Nakura
Yasuhiro Hirayama
Yasuhiro Hirayama
Application Number:
JP2013245087A
Publication Date:
May 16, 2018
Filing Date:
November 27, 2013
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G08G1/09; B60R21/00; G01S17/10; G01S17/93; G08G1/16; H04B10/114
Domestic Patent References:
| JP9159764A | ||||
| JP11163795A |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation
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