Off-board navigation system for vehicles
First Claim
1. An off-board navigation system for vehicles, comprising:
- at least one off board operating center; and
at least one on-board unit installed on board a vehicle and which communicates with said at least one off board operating center and can be used by a user for setting target destinations;
said at least one off board operating center comprising;
an off-board calculating unit, which receives a user request and is designed to calculate, in response, a route on the basis of the information regarding the position of said vehicle and on the basis of geographical data present in the off board operating center itself;
an off-board transceiver unit configured to transmit said route to said on-board unit; and
an off board monitoring system configured to monitor constantly the traffic and road conditions of a road network of a portion of territory and to detect traffic altering events that modify the road conditions of stretches of road forming part of said road network; and
an off-board processing system configured to determine, upon detection of an event that alters traffic conditions, whether said traffic altering event has occurred on a stretch of road forming part of said route supplied to said user and, in this case, to determine a point of no return (PNR) that is set along said route which corresponds to that point on the route beyond which any deviations from the route are no longer possible and beyond which said vehicle is no longer able to avoid said traffic altering event; and
a point of influence (AR) in which the amount of traffic congestion along said route starts to be affected by the onset of said traffic altering event and beyond which said user is still in time to request to and to receive from said operating center an alternative route designed to avoid said traffic altering event in the case where said point of no return (PNR) has not yet been exceeded, wherein the point of influence (AR) is determined on the basis of a distance (d) that said vehicle would cover in a time (test) of extinction of the traffic altering event if it were to cover said route in the opposite direction from the position of the traffic altering event and if it were to travel at a pre-set speed for covering said route; and
communicates such determination and associated data to the on-board unit.
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Accused Products
Abstract
Described herein is an off-board navigation system for vehicles, comprising at least one operating center and at least one on-board navigation unit installed on board a vehicle, in which the operating center is provided with monitoring means configured for detecting events that modify the road conditions of stretches of road forming part of a road network, and processing means designed to determine, following upon detection of an event, whether said event has occurred on a stretch of road forming part of a route supplied to a user and, in this case, to request an alternative route and determine a point of no return (PNR) that is set along the route supplied to a user and beyond which the vehicle is no longer able to avoid the event and a point of influence (AR), in which the practicability of the route starts to be affected by the onset of the event and beyond which the user is still in time to request and receive an alternative route that will enable him to avoid the event in the case where the point of no return (PNR) has not yet been exceeded.
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Citations
21 Claims
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1. An off-board navigation system for vehicles, comprising:
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at least one off board operating center; and at least one on-board unit installed on board a vehicle and which communicates with said at least one off board operating center and can be used by a user for setting target destinations; said at least one off board operating center comprising; an off-board calculating unit, which receives a user request and is designed to calculate, in response, a route on the basis of the information regarding the position of said vehicle and on the basis of geographical data present in the off board operating center itself; an off-board transceiver unit configured to transmit said route to said on-board unit; and an off board monitoring system configured to monitor constantly the traffic and road conditions of a road network of a portion of territory and to detect traffic altering events that modify the road conditions of stretches of road forming part of said road network; and an off-board processing system configured to determine, upon detection of an event that alters traffic conditions, whether said traffic altering event has occurred on a stretch of road forming part of said route supplied to said user and, in this case, to determine a point of no return (PNR) that is set along said route which corresponds to that point on the route beyond which any deviations from the route are no longer possible and beyond which said vehicle is no longer able to avoid said traffic altering event; and
a point of influence (AR) in which the amount of traffic congestion along said route starts to be affected by the onset of said traffic altering event and beyond which said user is still in time to request to and to receive from said operating center an alternative route designed to avoid said traffic altering event in the case where said point of no return (PNR) has not yet been exceeded, wherein the point of influence (AR) is determined on the basis of a distance (d) that said vehicle would cover in a time (test) of extinction of the traffic altering event if it were to cover said route in the opposite direction from the position of the traffic altering event and if it were to travel at a pre-set speed for covering said route; and
communicates such determination and associated data to the on-board unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An off-board navigation system for vehicles, comprising:
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an off board navigating and operating system; and an on-board unit installed on board a vehicle which is in communication with the off board operating system and which can be used by a user for setting target destinations; said off board navigating and operating system including; an off board calculating unit that receives a user request and, in response, calculates a route on the basis of the information regarding the position of said vehicle and on the basis of geographical data present in the off board operating system itself; an off board transceiver unit which transmits route data to said on-board unit; and an off board monitoring system which constantly monitors the traffic and road conditions of a road network of a portion of territory and to detect events that modify the road conditions of stretches of road forming part of said road network; and an off board processing system which, following detection of a traffic altering event that changes traffic conditions, determines whether said traffic altering event has occurred on a stretch of road forming part of said route supplied to said user and, in this case, then determines a point of no return (PNR) that is set along said route and beyond which said vehicle is no longer able to avoid said traffic altering event; and
thendetermines a point of influence (AR) in which the amount of traffic congestion along said route starts to be affected by the onset of said traffic altering event and beyond which said user is still in time to request to and to receive from said off board operating system an alternative route designed to avoid said traffic altering event in the case where said point of no return (PNR) has not yet been exceeded; and communicates such determinations and associated data to the vehicle on-board unit.
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Specification