Vehicle proxying

A vehicle-to-vehicle (V2V) communication system comprising:

• a basic time interval, of predetermined length, which repeats continuously;
• wherein the basic time interval is comprised of predetermined, consecutive, enumerated timeslots;
• a plurality of vehicles, each equipped with an associated V2V transponder;
• wherein a first vehicle with a first V2V transponder is configured to accept as input the first vehicle's position and heading;
• and the first V2V transponder uses a first protocol to obtain a first transmit timeslot;
• and the first V2V transponder broadcasts real-time vehicle information for the first vehicle in the first transmit timeslot, repetitively, once per basic time interval;
• a non-equipped second vehicle, free of a compatible V2V transponder;
• vehicle sensors located on the first vehicle, wherein the vehicle sensors identify the relative position of the second vehicle from the first vehicle;
• wherein the first V2V transponder broadcasts real-time vehicle information for the second vehicle, repetitively, once per basic time interval;
• wherein the broadcasts information for the second vehicle is marked as a proxy message;
• wherein the V2V communication system does not require fixed location, road-side units.

A method of communicating vehicle-to-vehicle comprising:

• repeating continuously a basic time interval, wherein the basic time interval is comprised of predetermined, consecutive, enumerated timeslots;
• accepting as input a first vehicle's position and heading to a V2V transponder associated with the first vehicle;
• wherein the V2V transponder is not dependent on communication from fixed infrastructure;
• using a first protocol by the V2V transponder to obtain a first timeslot;
• broadcasting messages in the first timeslot repetitively in each basic time interval;
• wherein at least one message comprises real-time information about the first vehicle;
• accepting as input a second vehicle's position relative to the first vehicle to the V2V transponder;
• broadcasting a message comprising information about the second vehicle.