Patent ID: 9552727
Date: 2017-01-24
CPC Classifications: B60R,B60W,G01C,G01S,G08G,H04J,H04L,H04W

Claim:
1. A vehicle-to-vehicle (V2V) communication transponder: wherein in the transponder comprises a processor and memory; wherein the transponder is adapted to operate in a first vehicle; 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 transmit V2V safety messages comprising: (i) the subject vehicle position; (ii) the subject vehicle heading; and (iii) a subject vehicle speed; the transponder uses a basic time interval (“frame”) of predetermined duration wherein the frame repeats continuously; wherein the frame comprises n time slots of predetermined duration, enumerated and contiguous; wherein the frame is subdivided into a 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 a self-selected time slot in the priority class region in every frame; wherein the self-selected time slot is the same time slot for every frame until a new time slot is self-selected by the transponder; wherein the transponder manages message broadcasts in the non-priority class region using Carrier Sense Multiple Access protocol.