Patent ID: 8634336

Claim:
A method of power saving in a wireless local area network, the method comprising: acquiring, by a wireless device, a transmission opportunity (TXOP) from an access point (AP), the TXOP indicating an interval of time when the AP has the right to transmit at least one data block for multi user-multiple input multiple output (MU-MIMO) transmission; receiving, by the wireless device, a signal field from the AP, the signal field including a group identifier, a number indicator and a power saving indicator, the group identifier indicating a group of recipients, the number indicator indicating a number of spatial streams for each recipient in the group of recipients, the power saving indicator indicating whether the AP allows the wireless device to enter a doze state during the TXOP; and entering, by the wireless device, the doze state until the end of the TXOP if: the power saving indicator indicates an allowance of entering the doze state, the wireless device is a member of the group of recipients indicated by the group identifier, and a number of spatial streams to be received by the wireless device is equal to zero.