Patent ID: 9743355
Date: 2017-08-22
CPC Classifications: H04W,Y02D

Claim:
1. A power save method comprising: receiving, by a station (STA), a null data packet announcement (NDPA) frame in a current transmission opportunity (TXOP) from an access point (AP), wherein the NDPA frame carries a PARTIAL_AID and a transmission opportunity_power save_not_allowed (TXOP_PS_NOT_ALLOWED), the PARTIAL_AID is zero, the TXOP_PS NOT_ALLOWED is zero; obtaining an STA association identifier (AID) from an STA information field of the NDPA frame; comparing, by the STA, an STA AID corresponding to the STA with the obtained STA AID from the STA information field of the NDPA frame; determining whether the STA AID corresponding to the STA is the same as the obtained STA AID; when the STA AID corresponding to the STA is determined to be different from the obtained STA AID, allowing the STA to enter a doze state until an end of the current TXOP; and when the STA AID corresponding to the STA is determined to be the same as the obtained STA AID, returning, by the STA, channel state information (CSI) to the AP.