Automotive telemetry protocol
First Claim
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1. A vehicular communications network for exchanging data between a plurality of both vehicle and stationary nodes, each stationary node comprising a computing unit operable to include traffic signalization, electronic tolling, and or electronic signage functions, each vehicle node comprising:
- an on board computing unit which is operable to broadcast identity messages to, and to receive identity messages from, a plurality of neighboring vehicle nodes on at least one roadway, the received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes, the computing unit in said each vehicle node being operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, the identity messages being broadcast on an assigned channel common to the neighboring vehicle nodes and at intervals effective for collision avoidance, the computing unit in said each vehicle node operable for exchanging operational data with selected ones of said plurality of neighboring vehicle nodes, the operational data including event notifications representative of driving maneuvers, said each vehicle node being operable to detect transition to another vehicle neighborhood by;
interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages;
monitoring identity messages on a plurality of channels, until said each vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages,wherein spectrum utilization is optimized by assigning channel usage to different vehicle neighborhoods according to conditions on the roadway,wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node,wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol,wherein the on board computing unit is configurable for dynamic adjustment of synchronization parameters governing passive node registration, compliant with IEEE 802.11, such that an interval between successive beacon frames is lengthened and a contention free period following transmission of each beacon frame is minimized,wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, andwherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood.
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Abstract
Disclosed is a method of conveying vehicle operation data from a vehicle to a remote monitoring recipient, comprising the steps of establishing a data link between the vehicle and the remote monitoring recipient; collecting vehicle operation data from data sources in the vehicle; packaging the vehicle operation data in a data packet using protocol derived from SNMP; and conveying the data packet over the data link.
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Citations
56 Claims
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1. A vehicular communications network for exchanging data between a plurality of both vehicle and stationary nodes, each stationary node comprising a computing unit operable to include traffic signalization, electronic tolling, and or electronic signage functions, each vehicle node comprising:
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an on board computing unit which is operable to broadcast identity messages to, and to receive identity messages from, a plurality of neighboring vehicle nodes on at least one roadway, the received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes, the computing unit in said each vehicle node being operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, the identity messages being broadcast on an assigned channel common to the neighboring vehicle nodes and at intervals effective for collision avoidance, the computing unit in said each vehicle node operable for exchanging operational data with selected ones of said plurality of neighboring vehicle nodes, the operational data including event notifications representative of driving maneuvers, said each vehicle node being operable to detect transition to another vehicle neighborhood by; interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages; monitoring identity messages on a plurality of channels, until said each vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, wherein spectrum utilization is optimized by assigning channel usage to different vehicle neighborhoods according to conditions on the roadway, wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node, wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol, wherein the on board computing unit is configurable for dynamic adjustment of synchronization parameters governing passive node registration, compliant with IEEE 802.11, such that an interval between successive beacon frames is lengthened and a contention free period following transmission of each beacon frame is minimized, wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, and wherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communications device for placement onboard a vehicle to form a vehicle node in a communications network servicing one or more roadways, for exchanging data between plurality of vehicle nodes and a plurality of stationary nodes, each stationary node comprising a computing unit operable to include traffic signalization, electronic tolling, and/or electronic signage functions, each vehicle node comprising:
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a radio unit operable to broadcast identity messages to, and to receive identity messages from, a plurality of neighboring vehicle received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes, the radio unit in said each vehicle node being operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, on an assigned channel common to the vehicle nodes in a vehicle neighborhood, the identity messages being exchanged at broadcast on an assigned channel common to the neighboring vehicle nodes and at intervals effective for collision avoidance, the radio unit in said each vehicle node operable for exchanging operational data with selected ones of said plurality of neighboring vehicles, the operational data including event notifications representative of driving maneuvers, said each vehicle node being operable to detect transition to another vehicle neighborhood by; interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages; and monitoring identity messages on a plurality of channels, until said each vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, the radio unit being operable for assigning channel usage to different vehicle neighborhoods according to roadway conditions, wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node, wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol, wherein the interval between successive beacon frames, required for passive node registration as defined in IEEE 802.11, is lengthened by the on board computer so as to maximize the contention free period following transmission of each beacon frame, wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, and wherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for placement onboard a vehicle to form a vehicle node in a communications network for exchanging data between a plurality of both vehicle and stationary nodes, each stationary node operable to include traffic signalization, electronic tolling, and/or electronic signage functions, each vehicle node operable to
broadcast identity messages to, and to receive identity messages from, a plurality of plural neighboring vehicle nodes on at least one roadway, the received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes, each vehicle node being operable over a high frequency channelized RF band, compliant with the IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, the identity messages being broadcast on an assigned channel common to the neighboring vehicle nodes and at intervals effective for collision avoidance; -
a computing unit in said each vehicle node operable for exchanging operational data with selected ones of said plurality of neighboring vehicle nodes, the operational data including event notifications representative of driving maneuvers, said each vehicle node being operable to detect transition to another vehicle neighborhood by; interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages; and monitoring identity messages on a plurality of channels, until the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages; optimizing spectrum utilization by assigning channel usage to different vehicle neighborhoods according to conditions on the roadway; and assigning the common channel according to current GPS heading of the plurality of neighboring vehicle nodes in the vehicle neighborhood, wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol, wherein the interval between successive beacon frames, required for passive node registration as defined in IEEE 802.11, is lengthened by the on board computer so as to maximize the contention free period following transmission of each beacon frame, wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, and wherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A vehicular communications network for exchanging data between a plurality of vehicle nodes, each vehicle node comprising an on board computing unit which is operable to broadcast identity messages to, and to receive identity messages from, a plurality of neighboring vehicle nodes in a vehicle neighborhood on at least one roadway, wherein the vehicle neighborhood includes one or more stationary nodes, each including a computing unit, the broadcast and received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes in the vehicle neighborhood, wherein the identity messages include GPS information;
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the computing unit in said each vehicle node and in the plurality of neighboring vehicle nodes being operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking to broadcast and to receive identity messages from one another, on an assigned channel common to the vehicle nodes in the vehicle neighborhood, the identity messages being exchanged at intervals effective for collision avoidance; the computing unit in said each vehicle node operable for exchanging operational data with selected ones of said plurality of neighboring vehicle nodes in the vehicle neighborhood on the assigned channel, the operational data including event notifications representative of driving maneuvers; wherein the common channel is assigned according to current GPS heading of the neighboring vehicle nodes in the vehicle neighborhood; each vehicle node being operable to detect transition to another vehicle neighborhood by monitoring identity messages on a plurality of channels, until the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, said each vehicle node being operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A communications device for placement onboard a vehicle to form a vehicle node in a communications network servicing one or more roadways, for exchanging data between a plurality of vehicle nodes and a plurality of stationary nodes, each stationary node comprising a computing unit operable to include traffic signalization, electronic tolling, and or electronic signage functions, each vehicle node comprising:
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a radio unit operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, the radio unit operable to broadcast identity messages and to receive identity messages from a plurality of neighboring vehicle nodes in a vehicle neighborhood on a roadway and on an assigned channel common to the plurality of neighboring vehicle nodes in the vehicle neighborhood at intervals effective for collision avoidance; and a computing unit for identifying, locating, and maintaining a listing of the plurality of neighboring vehicle nodes in the vehicle neighborhood, and for exchanging operational data with selected ones of the plurality of neighboring vehicle nodes in the vehicle neighborhood on the assigned channel, the operational data including event notifications representative of driving maneuvers, the computing unit being operable to define a vehicle neighborhood for the vehicle node, according to predetermined vehicle conditions of the vehicle node, and to dynamically change the vehicle neighborhood according to changes in the vehicle conditions, each on board computing unit operable to select a common channel for communication with other vehicle nodes in the neighborhood, the computing unit being operable to detect transition to another vehicle neighborhood by monitoring identity messages on a plurality of channels, until the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, each computing unit being operable to interact with the stationary node to detect transition to another vehicle neighborhood, said each vehicle node being operable to detect transition to another vehicle neighborhood by; interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages; monitoring identity messages on a plurality of channels, until said each the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, wherein spectrum utilization is optimized by assigning channel usage to different vehicle neighborhoods according to conditions on the roadway, wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node, wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol, wherein the interval between successive beacon frames, required for passive node registration as defined in IEEE 802.11, is lengthened by the on board computer so as to maximize the contention free period following transmission of each beacon frame, wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, and wherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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50. A method for enabling a vehicle node to communicate with a plurality of neighboring vehicle nodes in an ad hoc vehicle neighborhood network on a roadway, the vehicle node receiving messages from one or more stationary nodes, comprising:
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broadcasting identity messages from the vehicle node to the plurality of neighboring vehicle nodes and receiving identity messages from the plurality of neighboring vehicle nodes over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, on an assigned channel common to said vehicle node and the plurality of neighboring vehicle nodes in the vehicle neighborhood and at intervals effective for collision avoidance, wherein the identity messages of the vehicle node include GPS information; identifying, locating and maintaining a listing of the plurality of neighboring vehicle nodes in the vehicle neighborhood; exchanging operational data with selected ones of the plurality of neighboring vehicle nodes in the vehicle neighborhood on the assigned channel, the operational data including event notifications representative of driving maneuvers; detecting transition from one vehicle neighborhood to another, by monitoring identity messages on a plurality of channels until the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast their identity messages; detecting an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node, wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said computing units further comprise a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol; transmitting a notification to the plurality of neighboring vehicle nodes, when the vehicle node changes the channel on which it broadcasts identity messages and event notifications; and broadcasting identity messages over a predetermined discovery time period that is equal to a time period required to allow the vehicle node to be recognized by the plurality of neighboring vehicle nodes. - View Dependent Claims (51, 52, 53, 54, 55)
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56. A communications device for placement onboard a vehicle to form a vehicle node in a communications network servicing one or more roadways, for exchanging data between a plurality of vehicle nodes and a plurality of stationary nodes, each stationary node comprising a computing unit operable to include traffic signalization, electronic tolling, and/or electronic signage functions, each vehicle node, comprising;
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a radio unit operable over a high frequency channelized RF band, compliant with IEEE 802.11 Medium Access Control (MAC) protocol specification for ad-hoc networking, the radio unit operable to broadcast identity messages and to receive identity messages from the plurality neighboring vehicle nodes in a vehicle neighborhood on a roadway on a commonly assigned channel at intervals effective for collision avoidance; and a computing unit for exchanging operational data with selected ones of the plurality of neighboring vehicle nodes in the vehicle neighborhood on the assigned channel, the operational data including event notifications representative of driving maneuvers, the computing unit being operable to detect transition to another vehicle neighborhood by monitoring identity messages on a plurality of channels, until the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, received identity messages enabling each vehicle node to identify, to locate, and to list the plurality of neighboring vehicle nodes said each vehicle node being operable to detect transition to another vehicle neighborhood by; interacting with the stationary node to discover whether a different channel is currently assigned for broadcasting identity messages; and monitoring identity messages on a plurality of channels, until said each the vehicle node determines that the plurality of neighboring vehicle nodes are using a different channel to broadcast identity messages, wherein spectrum utilization is optimized by assigning channel usage to different vehicle neighborhoods according to conditions on the roadway, wherein said each vehicle node is operable to detect an exit of a departing neighboring vehicle node from the vehicle neighborhood, when a configurable amount of time expires without receiving identity messages from the departing neighboring vehicle node, wherein, in order to enable vehicle-to-vehicle notification and acknowledgment of a driving maneuver, each of said on board computing units further comprises a transmitter and receiver capable of transmitting and receiving messages under an SNMP protocol, wherein the interval between successive beacon frames, required for passive node registration as defined in IEEE 802.11, is lengthened by the on board computer so as to maximize the contention free period following transmission of each beacon frame, wherein each vehicle node is operable to transmit a notification to the plural neighboring vehicle nodes, when said each vehicle node changes the assigned channel on which it broadcasts identity messages, and wherein said each vehicle node is operable to broadcast identity messages over a predetermined discovery time period that is equal to a time period required to allow said each vehicle node to recognize the plurality of neighboring vehicle nodes, wherein both a length of a discovery period and a geographic size of the vehicle neighborhood are adjustable according to an average speed of the plurality of neighboring vehicles nodes in the vehicle neighborhood.
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Specification