MATHEMATICAL MODELING OF THE PREEMPTION MECHANISM IN Wi-Fi NETWORKS WITH MULTIPLE STATIONS

When developing a new amendment to the IEEE 802.11bn (Wi-Fi 8) standard, a preemption mechanism for channel access was proposed. This mechanism allows a station to interrupt a lower-priority transmission from an access point and gain access to the channel when a higher-priority data frame arrives. The preemption mechanism potentially guarantees low latency for real-time applications (RTAs), and the task of configuring the parameters of this mechanism is currently relevant. We develop an analytical model of a Wi-Fi 8 network with several stations generating priority traffic and an access point transmitting non-priority data streams. The model allows us to find the dependence of the quantile of priority traffic delay and access point throughput on the parameters of the preemption mechanism.