Patent ID: 9629078
Date: 2017-04-18
CPC Classifications: H04W,Y02D

Claim:
1. A method for scheduling a service period in a wireless LAN system, the method comprising: receiving, at a first wireless station, a beacon frame including a traffic indication map (TIM) from an access point (AP); if the TIM indicates that there is a buffered frame for the first wireless station, transmitting, at the first wireless station, a service period poll frame including a duration field of a polled service period, a basic service set identifier (BSSID) field, and a transmitter address (TA) field, wherein the BSSID field indicates an address of the AP, and the TA field indicates an address of the first wireless station, wherein the duration field indicates a time duration used for transmitting a buffered frame by the AP if the service period poll frame is received by the AP, wherein the duration field indicates a time duration used for a Network Allocation Vector (NAV) of a second wireless station that does not transmit the service period poll frame if the service period poll frame is received by the second wireless station; in response to the service period poll frame, receiving, at the first wireless station, an ACK message from the AP; and in response to the ACK message, entering, at the first wireless station, into a doze state.