  Multi-Access Point Coordination (MAPC) is becoming the cornerstone of the
IEEE 802.11bn amendment, alias Wi-Fi 8. Among the MAPC features, Coordinated
Spatial Reuse (C-SR) stands as one of the most appealing due to its capability
to orchestrate simultaneous access point transmissions at a low implementation
complexity. In this paper, we contribute to the understanding of C-SR by
introducing an analytical model based on Continuous Time Markov Chains (CTMCs)
to characterize its throughput and spatial efficiency. Applying the proposed
model to several network topologies, we show that C-SR opportunistically
enables parallel high-quality transmissions and yields an average throughput
gain of up to 59% in comparison to the legacy 802.11 Distributed Coordination
Function (DCF) and up to 42% when compared to the 802.11ax Overlapping Basic
Service Set Packet Detect (OBSS/PD) mechanism.
