In IEEE 1609, it uses IEEE 802.11 Enhanced Distributed Channel Access (EDCA) mechanism to access the channel. IEEE 802.11\r\nEDCA is a new wireless technology for wireless access in the vehicular environment (WAVE). It defines a new supplement to the\r\nexisting IEEE 802.11 MAC protocol. In IEEE 802.11 EDCA, the aim is providing a QoS support. While the system serves different\r\naccess categories (ACs), EDCA does not perform well under high load conditions. In order to improve the efficiency, we pay\r\nattention to the EDCA with transmit opportunity (TXOP) mechanism. We first proposed a Markov chain model and studied the\r\nbehavior. We extend the model to support IEEE 802.11 EDCA and presented a more accurate analysis under nonideal channel\r\nenvironment.We also compared it with that without TXOP mechanism under channel error environment.
Loading....