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The Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is an integrated algorithm employed in the Enhanced Distributed Channel Access (EDCA) in the IEEE 802.11p protocol. CSMA/CA manages the access of packets to the medium and its main role is to avoid collisions among them. An essential process of CSMA/CA is the backoff period in which the packets has to wait for a random number of...
Vehicular-to-Vehicular (V2V) and Vehicular-to-Infrastructure (V2I) communications in Vehicular Ad hoc Network (VANET) environment rely mainly on Medium Access Control (MAC) to minimize the delay and maintain reliable access to the communication medium. IEEE 802.11p standard is developed to achieve these goals. However its performance deteriorates drastically in large networks due to the high level...
The performance of Vehicular Ad hoc Networks (VANETs) is greatly affected by the design of Medium Access Control (MAC) protocol adopted by these networks. In large-scale networks, the MAC protocol of the IEEE 802.11p standard may fail to provide the required Quality of Service (QoS) provisioning, in terms of delay and reliability, for safety-related applications. Therefore, new MAC mechanisms should...
The implementation of a smart transportation infrastructure is of paramount importance to establish a safe and secure transportation system. An imperative component of this system is a reliable, secure and delay-sensitive wireless communication protocol that allows the exchange of data between vehicles and the neighbouring infrastructure in an efficient way. In this paper, we propose an Adaptive Service...
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