The invention provides a method and related network circuit for improving latency of a wireless network (e.g., a Wi-Fi network). The method may be executed by a device (e.g., a Wi-Fi station) of the wireless network, and may comprise: configuring a duration threshold according to a latency requirement, and, when transmitting a physical layer protocol data unit (PPDU) over the wireless network, causing the PPDU not to be longer than the duration threshold. In an embodiment, the latency requirement may be obtained by handshaking with one or more other devices of the wireless network.