Abstract
With the development of 5G, the Internet of Vehicles (IoV) evolves to be one important component of the Internet of Things (IoT), where vehicles and public infrastructure communicate with each other through a IEEE 802.11p EDCA mechanism to support four access categories (ACs) to access a channel. Due to the mobility of the vehicles, the network topology is time varying and thus incurs a dynamic network performance. There are many works on the stationary performance of 802.11p EDCA and some on real-time performance, but existing work does not consider real-time performance under extreme highway scenario. In this paper, we consider four ACs defined in the 802.11p EDCA mechanism to evaluate the limit of the real-time network performance in an extreme highway scenario, i.e., all vehicles keep the minimum safety distance between each other. The performance of the model has been demonstrated through simulations. It is found that some ACs can meet real-time requirements while others cannot in the extreme scenario.
Highlights
Nowadays, Internet of Things (IoT) networks are deployed to collect various information from surrounding systems through the realtime interaction with environment [1]
We first review the existing works for the performance analysis of the 802.11 distributed coordination function (DCF) mechanism, which is the basis of the 802.11p enhanced distributed channel access (EDCA) mechanism; we review the related works on the performance analysis of the 802.11p EDCA mechanism; and the works about the real-time performance analysis of the 802.11p EDCA mechanism is reviewed
In [13], Zheng and Wu considered the factors including saturated and nonsaturated condition, standard parameters, backoff counter, internal collision, and computational complexity and developed two Markov chains to analyze the performance of the IEEE 802.11p EDCA mechanism; the simulation experiments are conducted to verify the effectiveness of the derived performance models
Summary
IoT networks are deployed to collect various information from surrounding systems through the realtime interaction with environment [1]. Wireless Communications and Mobile Computing condition (vehicle do not always have data to transmit), standard parameters, backoff counter, internal collision, and computational complexity to analyze the performance of the IEEE 802.11p EDCA mechanism in the stationary state. To the best of our knowledge, there is no work analyzing the limit of the real-time performance of the 802.11p EDCA mechanism in the extreme highway scenario, i.e., all vehicles keep the minimum safety distance between each other, which motivates us to conduct this work. We consider four ACs and conduct models to analyze the limit of the real-time performance of the 802.11p EDCA mechanism in IoV.
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