US5760709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road/vehicle communication method and device
Assignee: Toyota Motor Corp
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Filing: 1996-03-27
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Granted: 1998-06-02
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Expires: 2016-03-27
Abstract
Abstract A road/vehicle communication method for communication between a plurality of road devices, which are provided with a plurality of road antenna devices at respective gates, and a vehicle communication device, which is mounted to a vehicle and transmits and receives information to and from the plurality of road devices by radio waves, includes the steps of: when the vehicle passes through a first gate, the vehicle communication device receiving gate information which relates to the first gate and which is transmitted from a road antenna device of the first gate, and the vehicle communication device transmitting the received gate information at a second gate; the second gate receiving gate information from a plurality of vehicle communication devices, and computing a communication probability for each antenna device of the first gate when a number of received gate information corresponding to the first gate has reached a predetermined number; and comparing, for each road antenna device, the communication probability with a predetermined reference value, and detecting, as a malfunctioning road antenna device, a road antenna device for which a difference between the communication probability and the predetermined reference value exceeds a predetermined value. Accordingly, at the second gate, a malfunctioning road antenna device can be detected among the road antenna devices of the first gate, and measures can be taken with respect to the malfunctioning road antenna device.
Inventors
- 👤 Hironao Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/06; G; G07; G07B; G07B15/00; G07B15/06; G07B15/063
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
207 words
A road/vehicle communication method for communication between a plurality of road devices, which are provided with a plurality of road antenna devices at respective gates, and a vehicle communication device, which is mounted to a vehicle and transmits and receives information to and from the plurality of road devices by radio waves, comprising the steps of: (a) when the vehicle passes through a first gate, the vehicle communication device receiving gate information which includes at least one of a gate number and antenna number and which relates to the first gate and which is transmitted from a road antenna device of the first gate, and the vehicle communication device transmitting the received gate information at a second gate; (b) the second gate receiving gate information from a plurality of vehicle communication devices, and computing a communication probability for each antenna device of the first gate when a number of received gate information corresponding to the first gate has reached a predetermined number; and (c) comparing, for each road antenna device, the communication probability with a predetermined reference value, and detecting as a malfunctioning road antenna device, a road antenna device for which a difference between the communication probability and the predetermined reference value exceeds a predetermined value.
Claim 2
Dependent Claim
207 words
A road/vehicle communication method for communication between a plurality of road devices, which are provided with a plurality of road antenna devices at respective gates, and a vehicle communication device, which is mounted to a vehicle and transmits and receives information to and from the plurality of road devices by radio waves, comprising the steps of: (a) when the vehicle passes through a first gate, the vehicle communication device receiving gate information which includes at least one of a gate number and antenna number and which relates to the first gate and which is transmitted from a road antenna device of the first gate, and the vehicle communication device transmitting the received gate information at a second gate; (b) the second gate receiving gate information from a plurality of vehicle communication devices, and computing a communication probability for each antenna device of the first gate when a number of received gate information corresponding to the first gate has reached a predetermined number; and (c) comparing, for each road antenna device, the communication probability with a predetermined reference value, and detecting as a malfunctioning road antenna device, a road antenna device for which a difference between the communication probability and the predetermined reference value exceeds a predetermined value.
Claim 3
Dependent Claim
35 words
A road/vehicle communication method according to claim 1, wherein the malfunctioning road antenna device is a road antenna device for which communication is impossible and for which the predetermined value is a lower limit value.
Claim 4
Dependent Claim
25 words
A road/vehicle communication method according to claim 1, wherein the road antenna device includes an antenna and an antenna control device which controls the antenna.
Claim 5
Dependent Claim
37 words
A road/vehicle communication method according to claim 1, further comprising the step of: (d) when a malfunctioning road antenna is detected in said step (c), outputting information giving notice that a malfunctioning road antenna has been detected.
Claim 6
Dependent Claim
29 words
A road/vehicle communication method according to claim 1, wherein the gate information includes first information which specifies which road antenna device of the first gate transmitted the gate information.
Claim 7
Dependent Claim
34 words
A road/vehicle communication method according to claim 5, wherein the first information is an antenna number, and respectively different antenna numbers are given to each of the road antenna devices of the first gate.
Claim 8
Dependent Claim
30 words
A road/vehicle communication method according to claim 1, wherein the reference value is a communication probability set in advance for each of the road antenna devices of the first gate.
Claim 9
Dependent Claim
20 words
A road/vehicle communication method according to claim 7, wherein the communication probabilities set in advance are stored in table form.
Claim 10
Dependent Claim
228 words
A road/vehicle communication device for communication between a plurality of road devices, which are provided with a plurality of road antenna devices at respective gates, and a vehicle communication device, which is mounted to a vehicle and transmits and receives information to and from the plurality of road devices by radio waves, wherein the vehicle communication device includes: storing means for storing gate information which includes at least one of a gate number and an antenna number and which is received when the vehicle passes through a first gate and which is transmitted from a road antenna device of the first gate and which relates to the first gate; and transmitting means for transmitting stored gate information at a second gate, and the road device includes: roadside receiving means for receiving, at the second gate, gate information from a plurality of vehicle communication devices; communication probability computing means for computing a communication probability for each road antenna device of the first gate when a number of received gate information corresponding to the first gate has reached a predetermined number comparing means for comparing, for each road antenna device, the communication probability with a predetermined reference value; and detecting means for detecting, as a malfunctioning road antenna device, a road antenna device for which a difference between the communication probability and the predetermined reference value exceeds a predetermined value.
Claim 11
Dependent Claim
228 words
A road/vehicle communication device for communication between a plurality of road devices, which are provided with a plurality of road antenna devices at respective gates, and a vehicle communication device, which is mounted to a vehicle and transmits and receives information to and from the plurality of road devices by radio waves, wherein the vehicle communication device includes: storing means for storing gate information which includes at least one of a gate number and an antenna number and which is received when the vehicle passes through a first gate and which is transmitted from a road antenna device of the first gate and which relates to the first gate; and transmitting means for transmitting stored gate information at a second gate, and the road device includes: roadside receiving means for receiving, at the second gate, gate information from a plurality of vehicle communication devices; communication probability computing means for computing a communication probability for each road antenna device of the first gate when a number of received gate information corresponding to the first gate has reached a predetermined number comparing means for comparing, for each road antenna device, the communication probability with a predetermined reference value; and detecting means for detecting, as a malfunctioning road antenna device, a road antenna device for which a difference between the communication probability and the predetermined reference value exceeds a predetermined value.
Claim 12
Dependent Claim
51 words
A road/vehicle communication device according to claim 9, wherein the road device further includes: outputting means for, when said detecting means detects a road antenna device as a malfunctioning road antenna device, outputting information including information expressing that the road antenna device has been detected as a malfunctioning road antenna device.
Claim 13
Dependent Claim
25 words
A road/vehicle communication device according to claim 9, wherein the road antenna device includes an antenna and an antenna control device which controls the antenna.
Claim 14
Dependent Claim
29 words
A road/vehicle communication device according to claim 9, wherein the gate information includes first information which specifies which road antenna device of the first gate transmitted the gate information.
Claim 15
Dependent Claim
34 words
A road/vehicle communication device according to claim 12, wherein the first information is an antenna number, and respectively different antenna numbers are given to each of the road antenna devices of the first gate.
Claim 16
Dependent Claim
44 words
A road/vehicle communication device according to claim 9, wherein the road device further includes: second storing means for storing the reference value, and the reference value is a communication probability set in advance for each of the road antenna devices of the first gate.
Claim 17
Dependent Claim
25 words
A road/vehicle communication device according to claim 14, wherein the communication probabilities set in advance are stored in table form in said second storing means.
Claim 18
Dependent Claim
35 words
A road/vehicle communication device according to claim 9, wherein the malfunctioning road antenna device is a road antenna device for which communication is impossible and for which the predetermined value is a lower limit value.
Claim 19
Dependent Claim
25 words
A road/vehicle communication device according to claim 16, wherein the road antenna device includes an antenna and an antenna control device which controls the antenna.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |