Patent ID: 7873018

Claim:
A method comprising: transmitting, by an apparatus to at least a first node, a second node, and a third node, a frame including a schedule identifying uplink and downlink transmission periods, at least one downlink start time and duration for the first node, and at least one uplink start time and duration for the second node, during a frame sequence for at least the first node and the second node in a wireless network, all of the uplink transmissions being scheduled after all of the downlink transmissions within the frame sequence, with the first node having only scheduled downlink transmissions during the frame sequence having its downlink start time for downlink transmissions scheduled at or near a start of the downlink transmissions; wherein: the scheduled uplink transmissions for the second node having only scheduled uplink transmissions are scheduled at or near an end of the uplink transmissions, the third node having both downlink and uplink transmissions has its uplink start time and downlink start time scheduled for transmissions near a transition from downlink to uplink transmissions, and the frame comprises an IEEE 802.11n Power Save Multi Poll frame.