Patent ID: 9326285
Filing Date: 2016-04-26
CPC Classification: H04W,Y02D

Claim Text:
1. A method of setting an SP (service period) of an STA (station) in a wireless communication system, comprising the steps of: receiving a beacon from an access point (AP), the beacon comprising a traffic indication map (TIM) element which indicates the AP has data to be received by the STA; transmitting a trigger frame to the AP; and starting the service period to receive data from the AP, wherein the trigger frame comprises a frame body field which includes a service period field information element (IE) and information related to automatic power saving delivery (APSD) downlink delivery, the service period field IE indicating a length of a service period, wherein the information related to the APSD downlink delivery comprises downlink data size limitation information of the APSD and an access category field indicating access categories capable of being delivered or triggered by the STA, wherein the access category field consists of data bits as many as the number of the access categories, and wherein each of the bits indicates whether a corresponding access category is possible to be delivered or triggered by the STA or not.