Vehicle-to-vehicle communication protocol
First Claim
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1. A method for vehicle to vehicle communication among a plurality of vehicles having wireless communication links, comprising:
- receiving notification of a priority message communication from a notifying vehicle, wherein said priority message communication concerns a sudden change in vehicle behavior;
broadcasting not less than one priority message communication to surrounding vehicles within a transmission range if said notifying vehicle is experiencing said sudden change in vehicle behavior;
determining whether said sudden change in vehicle behavior comprises an emergency event, wherein said emergency event includes creating a potential hazard to other vehicles;
discontinuing broadcasting of said priority message to said surrounding vehicles if said sudden change in vehicle behavior does not comprise an emergency event;
defining a repeat cycle, wherein said repeat cycle comprises the frequency with which said priority message is re-broadcast;
defining a maximum number of initial repetitions for said priority message;
pausing for variable time intervals between each transmission of said priority message;
determining whether said maximum number of repetitions has been reached;
repeating broadcasting said priority message and pausing between each said transmission until said maximum number of repetitions has been reached; and
electing a leader vehicle, wherein said leader vehicle is the primary transmitting vehicle in a series of vehicles reacting to said emergency event.
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Abstract
A method is provided for vehicle to vehicle communication among vehicles having wireless communication links. Upon receiving notification of a sudden change in vehicle behavior, a vehicle broadcasts a priority message to surrounding vehicles within a transmission range. If an emergency event has occurred, a repeat cycle is defined for re-broadcasting the message, and a maximum number of initial repetitions for the message is specified. The message is transmitted repeatedly by a leader vehicle, with a pause between each transmission, until the maximum number of repetitions has been reached.
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Citations
21 Claims
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1. A method for vehicle to vehicle communication among a plurality of vehicles having wireless communication links, comprising:
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receiving notification of a priority message communication from a notifying vehicle, wherein said priority message communication concerns a sudden change in vehicle behavior; broadcasting not less than one priority message communication to surrounding vehicles within a transmission range if said notifying vehicle is experiencing said sudden change in vehicle behavior; determining whether said sudden change in vehicle behavior comprises an emergency event, wherein said emergency event includes creating a potential hazard to other vehicles; discontinuing broadcasting of said priority message to said surrounding vehicles if said sudden change in vehicle behavior does not comprise an emergency event; defining a repeat cycle, wherein said repeat cycle comprises the frequency with which said priority message is re-broadcast; defining a maximum number of initial repetitions for said priority message; pausing for variable time intervals between each transmission of said priority message; determining whether said maximum number of repetitions has been reached; repeating broadcasting said priority message and pausing between each said transmission until said maximum number of repetitions has been reached; and electing a leader vehicle, wherein said leader vehicle is the primary transmitting vehicle in a series of vehicles reacting to said emergency event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for vehicle to vehicle communication among a plurality of vehicles having wireless communication links, the system structured with a controller in each participating vehicle, comprising:
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not less than one message receiver module, for receiving messages transmitted from other vehicles; immediate follower management module, for receiving messages forwarded from said not less than one message receiver module and determines the location of a receiving vehicle relative to a sending vehicle; emergency message generation module, for generating priority messages when an emergency event occurs; relevancy decision module, for receiving messages from said message receiver module and determining whether said transmitting vehicle is a potential hazard to the receiving vehicle; leader management module, for receiving messages from said message receiver module and determining whether a vehicle should continue broadcasting said priority message based on its leadership position; forwarding monitor module, for receiving messages from said message receiver module and determining whether to forward said priority message; emergency message broadcasting module, for broadcasting not less than one priority message when directed to broadcast said priority message by said leader management module; forwarding broadcasting module, for broadcasting said forwarded priority message when directed to forward said priority message by said forwarding monitor module; system clock module for periodically triggering the broadcast of regular driving messages; regular driving message generation module for generating vehicle motion update information when triggered by said system clock; and regular message broadcasting module for broadcasting said vehicle motion update information received from said regular driving message generation module. - View Dependent Claims (18, 19, 20)
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21. An article of manufacture comprising a computer usable medium having computer readable program code embodied in said medium which, when said program code is executed by said computer causes said computer to perform method steps for vehicle to vehicle communication among a plurality of vehicles having wireless communication links, comprising:
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receiving notification of an emergency status from a notifying vehicle, wherein said emergency status includes a sudden change in vehicle behavior; broadcasting a priority message to surrounding vehicles within a transmission range if said notifying vehicle is in said emergency status; determining whether said emergency status comprises an emergency event, wherein said emergency event includes creating a potential hazard to other vehicles; discontinuing broadcasting of said priority message to said surrounding vehicles is said emergency status does not comprise and emergency event; defining a repeat cycle, wherein said repeat cycle comprises the frequency with which said priority message is re-broadcast; defining a maximum number of repetitions for said priority message; pausing between each transmission of said priority message; determining whether said maximum number of repetitions has been reached; repeating broadcasting said priority message and pausing between each said transmission until said maximum number of repetitions has been reached; and electing a leader vehicle, wherein said leader vehicle is the primary transmitting vehicle in a series of vehicles reacting to said emergency event.
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Specification