Patent ID: 7412265

Claim:
A method for power-saving in a wireless local area network including a point coordinator and plural stations, each having an active state and a power-saving state, and transmitting and receiving data through a radio medium directly to and from the point coordinator, the method comprising: a beacon transmitting step in which the point coordinator periodically transmits a beacon frame embedding a schedule information field such that the beacon frame is compatible with the 802.11 standard without transmitting a schedule information frame following the beacon frame, the schedule information field including plural sets of an association identification sub-field and a time slot information sub-field, the association identification sub-field indicating that there is duration for a corresponding station to receive/transmit data and the time slot information sub-field specifying the time that the corresponding station is in the active state for receiving/transmitting data; a beacon receiving step in which each station periodically enters its active state to receive the beacon frame; and a wake-up step in which a specific station enters its active state to receive/transmit data in the time specified by the time slot information in the beacon frame when there is duration for the specific station to receive/transmit the data.