| 摘要 |
A new and unique method or apparatus for implementing an unscheduled automatic power save delivery (U-APSD) in a wireless local area network (WLAN) terminal, comprising maintaining a timer for defining a triggering interval between sending of subsequent trigger frames to a WLAN access point, wherein the value of the timer is set to dynamically change according to one or more criteria relating to the current communication situation. The criteria depend on whether there are buffered frames. at another node, point, terminal or device, such as an Access Point (AP)), in the wireless local area network (WLAN), or other suitable network. For example, when there are buffered frames at the AP, the WLAN terminal sets the triggering interval to a minimum value and sends null-data frames to quickly retrieve them, or when there is no buffered frame at the AP, the STA sets the triggering interval to a larger value to continue the doze mode for a long time and to save energy. The WLAN terminal incrementally increases the triggering interval in a binary exponential fashion, including doubling it, but not exceeding a maximum value. |
