Analytical Study of the IEEE 802.11p MAC Sublayer in Vehicular Networks
This paper proposes an analytical model for the throughput of the Enhanced Distributed Channel Access (EDCA) mechanism in the IEEE 802.11p Medium-Access Control (MAC) sub-layer. Features in EDCA such as different Contention Windows (CW) and Arbitration Inter-Frame Space (AIFS) for each Access Category (AC) and internal collisions are taken into account. The analytical model is suitable for both basic access and the Request-To-Send/Clear-To-Send (RTS/CTS) access mode. Different from most of existing 3-D or 4-D Markov-chain-based analytical models for IEEE 802.11e EDCA, without computation complexity, the proposed analytical model is explicitly solvable and applies to four access categories of traffic in the IEEE 802.11p.