Space-division repetition-based broadcasting protocol for reliable beaconing in VANETs
Proceedings of the 6th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
Green OLSR in VANETs with differential evolution
Proceedings of the 14th annual conference companion on Genetic and evolutionary computation
Cross-layer transmit power and beacon rate adaptation for VANETs
Proceedings of the third ACM international symposium on Design and analysis of intelligent vehicular networks and applications
Advances on Network Protocols and Algorithms for Vehicular Ad Hoc Networks
Mobile Networks and Applications
Beaconing Approaches in Vehicular Ad Hoc Networks: A Survey
Wireless Personal Communications: An International Journal
ALCA: agent learning---based clustering algorithm in vehicular ad hoc networks
Personal and Ubiquitous Computing
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In this paper, we present a new scheme for dynamic adaptation of transmission power and contention window (CW) size to enhance performance of information dissemination in Vehicular Ad-hoc Networks (VANETs). The proposed scheme incorporates the Enhanced Distributed Channel Access (EDCA) mechanism of 802.11e and uses a joint approach to adapt transmission power at the physical (PHY) layer and quality-of-service (QoS) parameters at the medium access control (MAC) layer. In our scheme, transmission power is adapted based on the estimated local vehicle density to change the transmission range dynamically, while the CW size is adapted according to the instantaneous collision rate to enable service differentiation. In the interest of promoting timely propagation of information, VANET advisories are prioritized according to their urgency and the EDCA mechanism is employed for their dissemination. The performance of the proposed joint adaptation scheme was evaluated using the ns-2 simulator with added EDCA support. Extensive simulations have demonstrated that our scheme features significantly better throughput and lower average end-to-end delay compared with a similar scheme with static parameters.