Patent ID: 9449515
Filing Date: 2016-09-20
CPC Classification: B60R,B60W,G01C,G01S,G08G,H04J,H04L,H04W

Claim Text:
1. A vehicle-to-vehicle (V2V) communication transponder adapted to operate in a first vehicle equipped with the V2V transponder wherein the transponder is adapted to accept as input a subject vehicle position and a subject vehicle heading, and wherein the transponder is adapted to broadcast a series of V2V safety messages wherein each V2V safety message comprises: (i) the subject vehicle position; (ii) the subject vehicle heading; and (iii) a subject vehicle speed; wherein the improvement is: the transponder uses a basic time interval (“frame”) of predetermined duration wherein the frame repeats continuously; wherein the frame comprises integer n time slots of predetermined duration, enumerated and contiguous; wherein a length of the frame and the integer n have been previously agreed with other transponders; wherein the frame is subdivided into a priority class region comprising contiguous time slots from a first time slot S a non-priority class region comprising contiguous time slots from a first time slot S wherein the range S wherein the transponder transmits only time-critical V2V safety messages in the priority class region; wherein the transponder broadcasts a V2V safety message in one self-selected time slot in the priority class region in every frame; wherein the V2V safety messages are broadcast in cleartext; and wherein the only vehicle identification in at least some V2V safety messages is the subject vehicle position.