Implicit power management mode and state transitions
First Claim
1. A method to transition a power management mode or a power management state for a wireless station associated with a wireless access point, the method comprising:
- by the wireless access point;
during an association procedure with the wireless station;
determining that the wireless station supports a high efficiency (HE) mode based on an exchange of capabilities with the wireless station; and
negotiating with the wireless station a target wake time (TWT) at which the wireless station will transition from a power save mode to an active mode or from a doze state to an awake state of the power save mode after receipt of beacon signals that indicate pending data for the wireless station; and
while associated with the wireless station;
buffering at least one data frame for transmission to the wireless station;
transmitting a beacon signal comprising a traffic indication map information element that indicates the at least one data frame buffered for transmission to the wireless station; and
without waiting for a power management mode or state change indication from the wireless station, after completing transmission of the beacon signal, at the TWT;
transitioning the power management mode maintained for the wireless station from a power save mode to an active mode, ortransitioning the power management state maintained for the wireless station from a doze state to an awake state of the power save mode, andtransmitting one or more data frames of the at least one data frame to the wireless station.
1 Assignment
0 Petitions
Accused Products
Abstract
A station (STA) of a wireless local area network (WLAN) transitions implicitly between power management (PM) modes or PM states, without providing an explicit indication of the PM mode/state change to an access point (AP) of the WLAN. Transitions include changes between an active mode and a power save (PS) mode, or between an awake state and a doze state of the PS mode. Transitions occur immediately after receipt of a beacon indicating pending data for the STA, after an offset time indicated in the beacon, or at a specific wake time negotiated with the AP. After data reception is complete, the STA transitions implicitly to the PS mode or a doze state of the PS mode, after a power save inactivity timeout period or after receiving an indication that data transmission is complete.
7 Citations
15 Claims
-
1. A method to transition a power management mode or a power management state for a wireless station associated with a wireless access point, the method comprising:
-
by the wireless access point; during an association procedure with the wireless station; determining that the wireless station supports a high efficiency (HE) mode based on an exchange of capabilities with the wireless station; and negotiating with the wireless station a target wake time (TWT) at which the wireless station will transition from a power save mode to an active mode or from a doze state to an awake state of the power save mode after receipt of beacon signals that indicate pending data for the wireless station; and while associated with the wireless station; buffering at least one data frame for transmission to the wireless station; transmitting a beacon signal comprising a traffic indication map information element that indicates the at least one data frame buffered for transmission to the wireless station; and without waiting for a power management mode or state change indication from the wireless station, after completing transmission of the beacon signal, at the TWT; transitioning the power management mode maintained for the wireless station from a power save mode to an active mode, or transitioning the power management state maintained for the wireless station from a doze state to an awake state of the power save mode, and transmitting one or more data frames of the at least one data frame to the wireless station. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method to transition a power management mode or state of a wireless station associated with a wireless access point, the method comprising:
-
by the wireless station; during an association procedure with the wireless access point; determining that the wireless access point supports a high efficiency (HE) mode based on an exchange of capabilities with the wireless access point; and negotiating with the wireless access point a target wake time (TWT) at which the wireless station will transition from a power save mode to an active mode or from a doze state to an awake state of the power save mode after receipt of beacon signals that indicate pending data for the wireless station; and while associated with the wireless access point; receiving a beacon signal comprising a traffic indication map information element that indicates at least one data frame buffered at the wireless access point for transmission to the wireless station; and without sending a power management mode or state change indication to the wireless access point, after receipt of the beacon signal, at the TWT; transitioning the power management mode of the wireless station from a power save mode to an active mode, or transitioning the power management state of the wireless station from a doze state to an awake state of the power save mode, and receiving one or more data frames of the at least one data frame from the wireless access point. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A wireless station comprising:
-
a communication interface configurable to communicate with a wireless access point via one or more antennas; a power management module; and processing circuitry, comprising one or more processors and memory, communicatively coupled to the power management module and the communication interface and configured to cause the wireless station to; during an association procedure with the wireless access point; determine that the wireless access point supports a high efficiency (HE) mode based on an exchange of capabilities with the wireless access point; and negotiate with the wireless access point a target wake time (TWT) at which the wireless station will transition from a power save mode to an active mode or from a doze state to an awake state of the power save mode after receipt of beacon signals that indicate pending data for the wireless station; and while associated with the wireless access point; receive a beacon signal comprising a traffic indication map information element that indicates at least one data frame buffered at the wireless access point for transmission to the wireless station; and without sending a power management mode or state change indication to the wireless access point, after receipt of the beacon signal, at the TWT; transition the power management mode of the wireless station from a power save mode to an active mode, or transition the power management state of the wireless station from a doze state to an awake state of the power save mode, and receive one or more data frames of the at least one data frame from the wireless access point. - View Dependent Claims (12, 13, 14, 15)
-
Specification