Mobile body communication device

• US 20040198254A1
• Filed: 01/23/2003
• Published: 10/07/2004
• Est. Priority Date: 01/23/2003
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Mizui, Seiichi, Kamada, Seiji
• Granted Patent: US 7,110,728 B2
• Time in Patent Office: Days
• US Class Current: 455/99
• CPC Class Codes: G08G 1/20 Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles

Abstract

An object of the present invention is to avoid communication congestion by varying the transmission times of a plurality of mobile bodies while maintaining standardization in the software to be installed in the plurality of mobile bodies. A detection is made in a plurality of vehicles 31, 32, 33 . . . that a specific event has occurred in a vehicle, for example a communication terminal 56 has been installed, or in other words power from a power source 63 has been applied to the communication terminal 56. The power application time is then measured by a calendar and timer in the interior of the vehicle. An individual automatic transmission time for each vehicle is then set with the power application time of the vehicle as a reference.

Claims

1. A mobile body communication device for transmitting information from a plurality of mobile bodies to a terminal device, wherein:

each of the plurality of mobile bodies is provided with information gathering means for gathering information relating to its own mobile body; and

each of the plurality of mobile bodies measures a time at which a specific event occurs in the own mobile body, sets an individual automatic transmission time for itself with the measured time as a reference and, when the automatic transmission time is reached, transmits the information gathered by the information gathering means from the own mobile body to the terminal device.

2. The mobile body communication device according to claim 1, wherein a time at which power is applied to the communication device which performs communication with the terminal device is measured, and the automatic transmission time of the mobile body is set with the power application time of the own mobile body as a reference.

3. The mobile body communication device according to claim 1, wherein the mobile body is a mobile body in which an engine is operated as a driving source, whereby a time at which the engine is last switched off is measured, and the automatic transmission time of the mobile body is set with the time at which the engine was last switched off in the own mobile body as a reference.

5. The mobile body communication device according to claim 1, wherein the plurality of mobile bodies transmits information to the terminal device at intervals of a fixed time period, and

each of the plurality of mobile bodies sets the individual automatic transmission time for itself within a range in the vicinity of the time that comes at intervals of the fixed time period.

4. A mobile body communication device for transmitting information from a plurality of mobile bodies to a terminal device, wherein each of the plurality of mobile bodies is provided with:

information gathering means for gathering information relating to its own mobile body; and

random number generating means, and wherein

each of the plurality of mobile bodies sets an individual automatic transmission time for itself with a random number generated by the random number generating means as a reference.

6. The mobile body communication device according to claim 4, wherein the plurality of mobile bodies transmits information to the terminal device at intervals of a fixed time period, and

each of the plurality of mobile bodies sets the individual automatic transmission time for itself within a range in the vicinity of the time that comes at intervals of the fixed time period.