Document Type

Conference Paper

Publication Date




Publication Title

2009 IEEE 70th Vehicular Technology Conference Fall



Conference Name

2009 IEEE 70th Vehicular Technology Conference Fall, September 20-23, 2009


In this paper, we propose an algorithm for joint adaptation of transmission power and contention window to improve the performance of vehicular network in a cross layer approach. The high mobility of vehicles in vehicular communication results in the change in topology of the Vehicular Ad-hoc Network (VANET) dynamically, and the communication link between two vehicles might remain active only for short duration of time. In order for VANET to make a connection for long time and to mitigate adverse effects due to high and fixed transmission power, the proposed algorithm adapts transmission power dynamically based on estimated local traffic density. In addition to that, the prioritization of messages according to their urgency is performed for timely propagation of high priority messages to the destination region. In this paper, we incorporate the contention based MAC protocol 802.11e enhanced distributed channel access (EDCA) mechanism to implement a priority-based vehicle-to-vehicle (V2V) communication. Simulation results show that the proposed algorithm is successful in getting better throughput with lower average end-to-end delay than the algorithm with static/default parameters.


U.S. Government work not protected by U.S. Copyright. This conference paper is in the public domain.

Original Publication Citation

Rawat, D. B., Yan, G., Popescu, D. C., Weigle, M. C., & Olariu, S. (2009). Dynamic adaptation of joint transmission power and contention window in VANET. Paper presented at the 2009 IEEE 70th Vehicular Technology Conference Fall, Anchorage, AK, September 20-23, 2009.


0000-0002-2787-7166 (Weigle), 0000-0002-3776-216X (Olariu)