Abstract: Methods, systems, and devices are described for wireless communication. In one method, a first node of an independent basic service set (IBSS) may receive a beacon from a second node of the IBSS. The beacon may include a token. Based at least in part on the token, the first node may determine that the second node has disconnected from and rejoined the IBSS. In another method, a token may be generated at a node. The token may indicate that the node has disconnected from and rejoined an IBSS. A beacon including the token may be transmitted to the IBSS responsive to the node rejoining the IBSS.

Abstract: Systems and methods are provided for coordinating power management states in a wireless communications device. An access point may buffer data for a station and may then initiate transfer of the buffered data to the station when the station is considered to be in active mode. The access point may transmit each of the one stored data frames with a more data indication when at least one additional frame is buffered and with a no more data indication when no additional frames are buffered. Receipt of the terminal frame including the no more data indication allows the station to return to power save mode without waiting for any timeout period and without risking missing a transmission from the access point.

Abstract: Systems and methods are provided for coordinating power management for wireless communications devices in an independent basic service set (IBSS). An announcement traffic indication message (ATIM) coordinator receives address information for destination stations for which data is buffered for transmission at source stations. The ATIM coordinator sends an ATIM Indication frame at the end of an ATIM window, alerting any destination station to remain awake to receive buffered data. Source stations may enter power save mode during the ATIM window after transmitting the address information for the destination stations to the ATIM coordinator. Destination stations may enter power save mode after receiving a beacon at the start of the ATIM window. Source and destination stations may awaken at the end of the ATIM window to receive the ATIM Indication frame.

Abstract: Functionality can be implemented to improve performance of a direct wireless communication link. In one embodiment, a first network device provides an indication to a second network device that the first network device will enter a power save mode. While operating in the power save mode, the first network device periodically transmits a trigger frame to the second network device to determine whether the second network device comprises buffered frames for the first network device. The first network device receives the buffered frames from the second network device responsive to transmitting the trigger frame. In another embodiment, if both the first and the second network devices operate in the power save mode, the first network device receives a notification of available buffered frames from the second network device. The first network device transmits buffered frames destined for the second network device prior to transmitting a response to the received notification.