Model of a Preemptive Channel Access Method in Multi-Station Wi-Fi Networks

To ensure reliable low-latency packet delivery required by real-time applications (RTAs), a new amendment to the Wi-Fi 8 standard proposes to employ the preemptive channel access method. Since this method has not been used in Wi-Fi networks before, the task of configuring its parameters to meet the Quality of Service requirements for RTA traffic is relevant. Previously, a network scenario was considered that included only one station serving priority traffic. In this paper, we investigate a more complex network scenario with $N$ stations generating priority traffic. To this end, we have developed a Wi-Fi 8 network model that allows us to find the dependence of the RTA frame delay quantile and access point throughput on RTA traffic intensity and channel access method parameters. We give guidelines for choosing access method parameters for transmitting priority frames with a required delay quantile under which the throughput of the access point in the network is maximized.