Operational efficiency in a vehicle-to-vehicle communications system

摘要

A vehicle communication system providing, in one embodiment, wirelessly transmitting and receiving messages regarding the status of parking spaces, such as empty or occupied. Only vehicles belonging to a predetermined set are able to decrypt such messages, in one embodiment. Message formats to comprise a group of parking spaces are described. An embodiment includes a communication mode specific for vehicles in a parking lot. An embodiment includes messages describing the shape and size of vehicle entering or leaving a parking space. Efficient methods of coding vehicle type are described. Methods of improving the operational efficiency of a vehicle communication system, including passive RF reflectors, audio and video messages, safety, courtesy and social messages, and compliance with vehicle restrictions are in some embodiments.

主权项

1. A vehicle-to-vehicle (V2V) communication system comprising:
a V2V transmitter configured to operate in a transmitting vehicle; wherein the V2V transmitter is configured to accept as input subject vehicle position and subject vehicle heading; wherein the V2V transmitter broadcasts V2V messages comprising: (i) the subject vehicle position; (ii) the subject vehicle heading; and (iii) subject vehicle speed; and a parking space detector configured to determine, for a parking space close to the subject vehicle, the full-versus-empty state of the parking space; wherein the V2V transmitter is further configured to comprise a motion mode and a parking lot mode wherein transmissions by the V2V transmitter occur at a first regular time interval in the motion mode and occur at a second regular time interval in the parking lot mode and the second regular time interval is longer than the first regular time interval.