Non-repetitive single-hop broadcast model for CAM in IEEE802.11p VANETs

VANETs relies on the repetitive exchange of Cooperative Awareness Messages (CAMs) among vehicle's On­Board Units (OBUs) and vehicles to roadside units (RSUs), thus making CAMs the backbone of the network. This exchange may lead to degradation of network performance caused by the ample amount of data exchange between the vehicles. Therefore, a trade­off between CAM broadcast within the network and optimum utilization of network resources is required. Most of the existing work focuses on retransmission of beacon messages supporting unicast 802.11 models which are not directly suited for the VANET scenario. To deal with this problem, the paper presents a model for non-repetitive single-hop broadcast of CAM within the network, thus supporting IEEE802.11p. For non-repetitive broadcast of CAM, the concept of preemption of messages is introduced in the model. Simulation is carried out using MATLAB 15's Simiilink. The model performance is evaluated by extracting its statistical properties in terms of Channel Utilization, CAM's Average Waiting Time within the queue and Average Queue Length. To validate our model, the simulation is implemented on real world data acquired from wheel speed for all wheels for the duration of a test drive.

[1]  Manikanden Balakrishnan,et al.  Channel preemptive EDCA for emergency medium access in distributed wireless networks , 2009, IEEE Transactions on Wireless Communications.

[2]  Ravi M. Yadumurthy,et al.  Reliable MAC broadcast protocol in directional and omni-directional transmissions for vehicular ad hoc networks , 2005, VANET '05.

[3]  Neeta Singh,et al.  Statistical behavior analyses of CAM queue model in Vehicular Adhoc Networks , 2015, 2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS).

[4]  Neeta Singh,et al.  An Analytical Review of the Algorithms Controlling Congestion in Vehicular Networks , 2015 .

[5]  S. Esterby.  American Society for Testing and Materials , 2006 .

[6]  Hazem H. Refai,et al.  A Quantitative Approach to Evaluate DSRC Highway Inter-Vehicle Safety Communication , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[7]  Chengzhi Li,et al.  RMAC: a reliable multicast MAC protocol for wireless ad hoc networks , 2004 .

[8]  Kishor S. Trivedi,et al.  An Interacting Stochastic Models Approach for the Performance Evaluation of DSRC Vehicular Safety Communication , 2013, IEEE Transactions on Computers.

[9]  Jun Zheng,et al.  Modeling and Performance Analysis of Periodic Broadcast in Vehicular Ad Hoc Networks , 2011, 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011.

[10]  Fred Daneshgaran,et al.  A Model of the IEEE 802.11 DCF in Presence of Non Ideal Transmission Channel and Capture Effects , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[11]  Hazem H. Refai,et al.  Unsaturated Performance of IEEE 802.11 Broadcast Service in Vehicle-to-Vehicle Networks , 2007, 2007 IEEE 66th Vehicular Technology Conference.