Title :
RTMB/CTMB: A Collision Avoidance Scheme for VANET Broadcast
Author :
Tung, Lung-Chih ; Gerla, Mario
Author_Institution :
Dept. of Comput. Sci., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
Traditional directional broadcast protocols for VANETs always select redundant nodes and thus are not very efficient. Road-based directional broadcast was proposed to solve this problem. The basic idea is to categorize vehicles based on road topology and select a relay for each road. It improves the efficiency significantly, but data propagation could fail due to collisions. In this paper, we aim to add reliability to road-based directional broadcast protocol. A MAC layer collision avoidance scheme is proposed to reduce the chance of collision between the sender and the selected relay nodes, while other nodes can receive data opportunistically. By limiting the number of selected relays, this scheme improves the delivery ratio than that of traditional broadcast protocols while keeping the efficiency at a comparable level.
Keywords :
access protocols; vehicular ad hoc networks; MAC layer collision avoidance scheme; RTMB-CTMB; VANET broadcast; data propagation; delivery ratio; road topology; road-based directional broadcast protocol; selected relay nodes; sender relay nodes; vehicular ad hoc network; Ad hoc networks; Protocols; Relays; Reliability; Roads; Topology; Vehicles;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-8328-0
DOI :
10.1109/VETECF.2011.6093021
