System and method of vehicular wireless communication
First Claim
1. A method of vehicular wireless communication over a Dedicated Short Range Communication service band implemented by a programmed processor, said method comprising the steps of:
- dividing the service band into a control channel for transmitting a safety communication, and a service channel for transmitting a non-safety communication;
subdividing the control channel into intervals of time, wherein one interval is a safety exchange interval and each registered vehicle transmits a safety communication at predetermined time during the safety exchange interval, and the predetermined time is determined by an access point;
determining if the vehicle is within communications range of an access point service region, wherein the access point service region is a geographic area containing an access point that transmits and receives non-safety communications to and from the vehicle in the access point service region;
determining if the vehicle is registered with the access point, if the vehicle is within the communications range of the access point, wherein the access point maintains a list of registered vehicles, and registering the vehicle with the access point if not registered;
determining if a current time is within the safety exchange interval in a contention free period of time in the control channel, and transmitting the safety communication by each registered vehicle during the safety exchange interval at the predetermined time for each registered vehicle, if the current time is within the safety exchange interval of the contention free period;
determining if the safety communication exchange by every registered vehicle is completed, and permitting the vehicle to leave the control channel if the safety communication exchange is complete; and
determining if a current time is within a contention period, and transmitting the non-safety communication if the current time is within the contention period.
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Accused Products
Abstract
A system and method of vehicular wireless communication over a Dedicated Short Range Communication service band is provided. The system includes a vehicle having a navigation means, a processor, and a communication means for transmitting a message via a wireless communications link. The system includes a control channel for communication a safety communication and a service channel for communicating a non-safety communication. The control channel is subdivided into a contention-free period having a safety exchange interval of time for transmitting a safety communication and a contention period having a non-safety service interval of time for transmitting a non-safety communication. The system further includes an access point in communication with the vehicle via the communications link within region. The method includes the steps of determining if the vehicle is within communications range of the region, determining if the vehicle is registered with the access point, and if the vehicle is within the communications range of access point, determining if a current time is within the safety exchange interval, and transmitting the safety communication by each registered vehicle during the safety exchange interval at the predetermined time for each registered vehicle. The method further includes the steps of determining if the safety communication exchange by every registered vehicle is completed, and permitting the vehicle to leave the control channel if the safety communication exchange is complete, and determining if a current time is within a contention period, and transmitting the non-safety communication if the current time is within the contention period.
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Citations
15 Claims
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1. A method of vehicular wireless communication over a Dedicated Short Range Communication service band implemented by a programmed processor, said method comprising the steps of:
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dividing the service band into a control channel for transmitting a safety communication, and a service channel for transmitting a non-safety communication; subdividing the control channel into intervals of time, wherein one interval is a safety exchange interval and each registered vehicle transmits a safety communication at predetermined time during the safety exchange interval, and the predetermined time is determined by an access point; determining if the vehicle is within communications range of an access point service region, wherein the access point service region is a geographic area containing an access point that transmits and receives non-safety communications to and from the vehicle in the access point service region; determining if the vehicle is registered with the access point, if the vehicle is within the communications range of the access point, wherein the access point maintains a list of registered vehicles, and registering the vehicle with the access point if not registered; determining if a current time is within the safety exchange interval in a contention free period of time in the control channel, and transmitting the safety communication by each registered vehicle during the safety exchange interval at the predetermined time for each registered vehicle, if the current time is within the safety exchange interval of the contention free period; determining if the safety communication exchange by every registered vehicle is completed, and permitting the vehicle to leave the control channel if the safety communication exchange is complete; and determining if a current time is within a contention period, and transmitting the non-safety communication if the current time is within the contention period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system of vehicular wireless communication over a Dedicated Short Range Communication service band within a region comprising:
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a navigation means on a vehicle that is in communication with a global positioning system which includes a global positioning transceiver associated with the vehicle, and a global positioning signal transmitter in communication with the vehicle global positioning transceiver; a processor on the vehicle that is in communication with said navigation means; an input means in communication with said processor; a user notification device operatively in communication with said navigation means for providing information to a vehicle operator; a user manual input mechanism operatively in communication with said navigation means for transmitting information from the vehicle operator; a communication means operatively in communication with said navigation means for transmitting a message over a channel on the Dedicated Short Range Communication service band via a wireless communications link, wherein the channel is divided into a control channel for communicating a safety communication and a service channel for communicating a non-safety communication, and the control channel is further subdivided into a contention free time period and a contention time period, and the contention free time period is subdivided into a safety exchange interval of time whereby each registered vehicle transmits a safety communication at a predetermined time during the safety exchange interval and the contention time period is subdivided into a non-safety service interval of time; an access point operatively in communication with the vehicle via said communications link within an access point service region, wherein the access point service region is a geographic area containing the access point and said access point registers the vehicle if the vehicle is within a communication range of the access point, and determines a predetermined time for each registered vehicle to transmit a safety communication during the safety exchange interval, and determines if the safety communication exchange by the registered vehicle is complete and permits the vehicle to leave the control channel if the safety communication is complete. - View Dependent Claims (12, 13, 14, 15)
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Specification