Receive Power-Based Prioritized Rebroadcasting for V2V Safety Message Dissemination

Rapidly and robustly disseminating safety messages is an important goal for vehicle-to-vehicle communications. When multiple vehicles receive an alert message, packet collisions may occur if they rebroadcast the message simultaneously. Due to the broadcast nature of safety messages, acknowledgement on the reception of packets is difficult, and such collision leads to nonrecoverable failed delivery. The proposed Receive Power-Based Prioritized Rebroadcast (RPPR) scheme (1) minimizes the probability of packet collision during rebroadcast, and (2) maximizes the probability that a vehicle that is furthest away from the source rebroadcasts an alert message first. This improves robustness and minimizes the packet delivery time. ITS World Congress 2009 This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Copyright c ©Mitsubishi Electric Research Laboratories, Inc., 2009 201 Broadway, Cambridge, Massachusetts 02139