Vehicle Position Updating Strategy Based on Kalman Filter Prediction in VANET Environment

Algorithm 1

The repetition model decision algorithm based on intervehicle distance.

(1) Input: Eucli_Dist, Max_Number_of_Repetitions, Max_Transmission_Dist,

(2) Min_Repetions_Dist, Repetions_Interval, Adjust_PDR;

(3) Output: Number_of_Repetitions;

(4) If Eucli_Dist < Max_Transmission_Dist and Eucli_Dist > Min_Repetions_Dist then

(5)  If Number_of_Repetitions < Max_Number_of_Repetitions then

(6)   If PDR ≤ Adjust_PDR

(7)    Increase_Num_of_Repetions(Number_of_Repetitions, Repetions_Interval);

(8)    Else

(9)     Number_of_Repetitions = Max_Number_of_Repetitions;

(10)   End

(11)   Else

(12)  Decrease_Num_of_Repetions(Number_of_Repetitions, Repetions_Interval);

(13)  Else

(14)   Increase_Num_of_Repetions(Number_of_Repetitions, Repetions_Interval);

(15) End