(1)Procedure (BSMi)
(2) rank = prioritization scheme (BSMi)
(3) If (status.BSMi−1.verified) or (status.BSMi−1.dropped):
(4)  Update-History (BSMi.ID, status.BSMi.unverified, BSMi)
(5) Else If (status.BSMi−1.unverified):
(6)  Discard (BSMi−1) from buffer
(7)  Update-History (BSMi.ID, status.BSMi.unverified, BSMi)
(8) Insert BSMi into buffer
(9)End Procedure
Algorithm 1: The procedure of managing history for a new arrival BSM.