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Performance modeling of the IEEE 802.11p EDCA mechanism for VANET

机译：VANET的IEEE 802.11p EDCA机制的性能建模

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This paper develops an analytical model for analyzing the access performance of the IEEE 802.11p EDCA mechanism. A 2-D Markov chain is first constructed to describe the backoff procedure of an AC queue and establish a relationship between the transmission probability and collision probability of the AC queue. Then a 1-D infinite discrete-time Markov chain is constructed to describe the contention period of an AC queue and establish another relationship between the transmission probability and collision probability of the AC queue. The two Markov models take into account the saturation condition, standard parameters, backoff counter freezing, and internal collision. Based on the two Markov chains, an analytical model is further derived to describe the relationship between the parameters of an AC queue and the access performance of the AC queue in terms of the transmission probability and the collision probability, respectively. The effectiveness of the analytical model is verified through simulation results.
机译：本文开发了一个分析模型，用于分析IEEE 802.11p EDCA机制的访问性能。首先构造二维马尔可夫链来描述AC队列的退避过程，并建立AC队列的传输概率和冲突概率之间的关系。然后构造一维无限离散时间马尔可夫链来描述AC队列的竞争周期，并建立AC队列的传输概率和冲突概率之间的另一种关系。这两个马尔可夫模型考虑了饱和条件，标准参数，退避计数器冻结和内部碰撞。基于两个马尔可夫链，进一步推导了解析模型，分别从传输概率和冲突概率两个角度描述了AC队列参数与AC队列访问性能之间的关系。通过仿真结果验证了分析模型的有效性。

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