Title:
COMMUNICATION CONTROL METHOD FOR MOBILE OBJECT
Document Type and Number:
Japanese Patent JP3134735
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To securely transfer information without the lack of information when information is transferred between plural responders and one question unit in a communication area.
SOLUTION: A road machine transmits an inquiry signal (communication 1) and an on-vehicle machine stores and returns present time in the on-vehicle machine, which is received at first, as start time (communication 2). When answers are given from the plural on-vehicle machines, the road machine selects the on-vehicle machine with the earliest time among the plural received start times as the on-vehicle machine of a communication object. The on-vehicle machine which passes a communication area the earliest is selected and an answer signal for a handshake is transmitted to the on-vehicle machine (communication 3). The on-vehicle machine gives the reply (communication 4). When the handshake between the road machine and the on-vehicle machine is realized, data is transferred between the road machine and the on-vehicle machine.
Inventors:
Hironao Hayashi
Hiroshi Watanabe
Hiroshi Watanabe
Application Number:
JP26014295A
Publication Date:
February 13, 2001
Filing Date:
October 06, 1995
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G07B15/00; G08G1/017; (IPC1-7): G07B15/00; G07B15/00; G08G1/017
Domestic Patent References:
| JP6201821A | ||||
| JP744740A | ||||
| JP8242192A | ||||
| JP944614A | ||||
| JP6181449A | ||||
| JP4315282A | ||||
| JP6131509A | ||||
| JP744740A |
Other References:
【文献】登録実用新案3010293(JP,U)
【文献】国際公開91/10290(WO,A1)
【文献】国際公開91/10290(WO,A1)
Attorney, Agent or Firm:
Atsushi Nakajima (3 outside)