INTER-VEHICLE COMMUNICATION SYSTEM AND METHOD FOR INDICATING SPEED AND DECELERATION
First Claim
1. A vehicle communication system comprising:
- a transmission portion which is provided in a host vehicle, and which transmits information;
a host vehicle speed detection portion that detects a speed of the host vehicle;
a deceleration determination portion that determines whether the host vehicle decelerates or predicts whether the host vehicle will decelerate; and
a transmission control portion that controls at least one of a transmission output of the transmission portion and a frequency of transmission from the transmission portion according to the speed of the host vehicle detected by the host vehicle speed detection portion so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed of the host vehicle becomes lower,wherein in a case where the deceleration determination portion determines that the host vehicle decelerates or predicts that the host vehicle will decelerate, the transmission control portion controls the at least one of the transmission output and the frequency of transmission so that the at least one of the transmission output and the frequency of transmission is high as compared to a case where the deceleration determination portion determines that the host vehicle does not decelerate or predicts that the host vehicle will not decelerate.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmission cycle/output control portion (20) controls at least one of a transmission output of an inter-vehicle communication device (22) and a frequency of transmission from the inter-vehicle communication device (22) according to the speed of a host vehicle (100) detected by an in-vehicle sensor (12) so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed becomes lower. In the case where the in-vehicle sensor (12) and a deceleration determination/gradient calculation portion (16) determine that the host vehicle (100) decelerates, the transmission cycle/output control portion (20) executes a control so that the at least one of the transmission output and the frequency of transmission is high as compared to the case where it is determined that the host vehicle (100) does not decelerate. Therefore, when the host vehicle (100) does not decelerate, communication traffic is reduced. When the host vehicle (100) decelerates, necessary communication is performed.
12 Citations
17 Claims
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1. A vehicle communication system comprising:
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a transmission portion which is provided in a host vehicle, and which transmits information; a host vehicle speed detection portion that detects a speed of the host vehicle;
a deceleration determination portion that determines whether the host vehicle decelerates or predicts whether the host vehicle will decelerate; anda transmission control portion that controls at least one of a transmission output of the transmission portion and a frequency of transmission from the transmission portion according to the speed of the host vehicle detected by the host vehicle speed detection portion so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed of the host vehicle becomes lower, wherein in a case where the deceleration determination portion determines that the host vehicle decelerates or predicts that the host vehicle will decelerate, the transmission control portion controls the at least one of the transmission output and the frequency of transmission so that the at least one of the transmission output and the frequency of transmission is high as compared to a case where the deceleration determination portion determines that the host vehicle does not decelerate or predicts that the host vehicle will not decelerate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vehicle communication system comprising:
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a transmission portion which is provided in a host vehicle, and which transmits information; a transmission control portion that controls at least one of a transmission output of the transmission portion and a frequency of transmission from the transmission portion; a host vehicle speed detection portion that detects a speed of the host vehicle; and a deceleration determination portion that determines whether the host vehicle decelerates or predicts whether the host vehicle will decelerate, wherein in a case where the deceleration determination portion determines that the host vehicle decelerates or predicts that the host vehicle will decelerate, the transmission control portion controls the at least one of the transmission output and the frequency of transmission so that the at least one of the transmission output and the frequency of transmission is equal to a first value higher than a second value at a time point at which the deceleration determination portion determines that the host vehicle decelerates or predicts that the host vehicle will decelerate. - View Dependent Claims (11)
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12. A vehicle communication system comprising:
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a transmission portion which is provided in a host vehicle, and which transmits information; a host vehicle speed detection portion that detects a speed of the host vehicle; a deceleration determination portion that determines whether the host vehicle decelerates or predicts whether the host vehicle will decelerate; and a transmission control portion that executes a vehicle speed-dependent control that controls at least one of a transmission output of the transmission portion and a frequency of transmission from the transmission portion according to the speed of the host vehicle detected by the host vehicle speed detection portion so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed of the host vehicle detected by the host vehicle speed detection portion becomes lower, wherein in a case where the deceleration determination portion determines that the host vehicle decelerates or predicts that the host vehicle will decelerate, the transmission control portion delays start of the vehicle speed-dependent control. - View Dependent Claims (13)
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14. A vehicle communication method comprising:
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transmitting information stored in a host vehicle; detecting a speed of the host vehicle; setting at least one of a transmission output at which the information is transmitted and a frequency of transmission with which the information is transmitted, according to the detected speed of the host vehicle so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed of the host vehicle becomes lower; determining whether the host vehicle decelerates or predicting whether the host vehicle will decelerate; and controlling the at least one of the transmission output and the frequency of transmission so that the at least one of the transmission output and the frequency of transmission is high in a case where it is determined that the host vehicle decelerates or it is predicted that the host vehicle will decelerate, as compared to a case where it is determined that the host vehicle does not decelerate or it is predicted that the host vehicle will not decelerate.
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15. A vehicle communication method comprising:
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transmitting information stored in a host vehicle at a transmission output and with a frequency of transmission; detecting a speed of the host vehicle; determining whether the host vehicle decelerates or predicting whether the host vehicle will decelerate; and setting at least one of the transmission output and the frequency of transmission to a value higher than a value at a time point at which it is determined that the host vehicle decelerates or it is predicted that the host vehicle will decelerate, in a case where it is determined that the host vehicle decelerates or it is predicted that the host vehicle will decelerate.
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16. A vehicle communication method comprising:
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transmitting information stored in a host vehicle; detecting a speed of the host vehicle; and executing a vehicle speed-dependent control that controls at least one of a transmission output at which the information is transmitted and a frequency of transmission with which the information is transmitted, according to the detected speed of the host vehicle so that the at least one of the transmission output and the frequency of transmission is set to a lower value as the speed of the host vehicle becomes lower; determining whether the host vehicle decelerates or predicting whether the host vehicle will decelerate; and delaying start of the vehicle speed-dependent control, in a case where it is determined that the host vehicle decelerates or it is predicted that the host vehicle will decelerate. - View Dependent Claims (17)
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Specification