Title :
A Probability Based MAC Channel Congestion Control Mechanism for VANET
Author :
Hsu, Mark Chih-Wei ; Tien-Yuan Hsieh
Author_Institution :
Inf. & Commun. Labs., Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
A significant issue in VANETs (Vehicular Ad Hoc Networks) is the design of an effective MAC (Medium Access Control) or broadcast scheme which can facilitate the fast and reliable dissemination of critical safety messages to neighboring vehicles in case of an unexpected event. Broadcasting of data and control packets is expected to be crucial in vehicular environment. Most of the broadcasting packet is designed to be delivered on a given frequency during the control channel (CCH) interval set by the IEEE 1609.4 standard [1] (which provides enhancements to the IEEE 802.11p MAC by supporting multi-channel operation). In this paper, the probability based MAC channel congestion control mechanism is developed to cope with rapid topology changes, i.e., vehicles entering and leaving the network, as well as overloaded situations in terms of increased number of vehicles and/or increased amount of data traffic injected without collapsing. Method is also based on the estimation of potential neighboring vehicles through broadcasting Hello messages, and then based on probability model to calculate the expected offset slots for reduce the collision situations, and thus improve transmission performance.
Keywords :
access protocols; broadcasting; data communication; probability; telecommunication channels; telecommunication congestion control; telecommunication traffic; vehicular ad hoc networks; wireless LAN; IEEE 1609.4 standard; IEEE 802.11p MAC; VANET; broadcast scheme; broadcasting; broadcasting packet; control channel; control packets; critical safety messages; data broadcasting; data traffic; medium access control; multichannel operation; neighboring vehicles; offset slots; probability based MAC channel congestion control mechanism; probability model; transmission performance; vehicular ad hoc networks; vehicular environment; Estimation; Mathematical model; Safety; Throughput; Vehicles; Vehicular ad hoc networks;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th
Conference_Location :
Dresden
DOI :
10.1109/VTCSpring.2013.6691842