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Title:
車両用通信システム、車載通信機、車両および車両システム
Document Type and Number:
Japanese Patent JP4632909
Kind Code:
B2
Abstract:

To provide a vehicular communication system for reducing power consumption (especially the power consumption of a passenger-side device) by properly executing power supply management.

An in-vehicle communication device 20 conducts wireless communication between a helmet-side wireless communication device provided at a helmet put on by a passenger of a vehicle. The in-vehicle communication device 20 is provided with first/second wireless units 51, 52 each conducting a wireless communication between a driver's helmet-side wireless communication device and a passenger's helmet-side wireless communication device. Power is supplied to the wireless units 51, 52 from a power supply 23 via a wireless unit power supply switch 25. An information processor 22 monitors the propriety of communication between the driver's helmet-side wireless communication device and the passenger's helmet-side wireless communication device. When communication with either of the helmet-side wireless communication devices becomes impossible, the information processor 22 transmits a mode control command for controlling the other communicable helmet-side communication device into a power-saving mode.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
Mizuno Masamitsu
Kumashi Masumi
Application Number:
JP2005265438A
Publication Date:
February 16, 2011
Filing Date:
September 13, 2005
Export Citation:
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Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
Yamaha Corporation
International Classes:
H04W4/04; H04M1/73; H04W24/00; H04W52/02
Domestic Patent References:
JP2004112676A
JP200295057A
Attorney, Agent or Firm:
Inaoka cultivation
Mio Kawasaki