Method and apparatus for controlling buffered data transmission schedule in wireless local area network, terminal for receiving buffered data based on transmission schedule in wlan

The present invention relates to a technology by which an access point managing a network in a wireless local area network (WLAN) environment controls a transmission schedule of buffered data, and a terminal obtains information the transmission schedule. A device controlling a transmission schedule of buffered data in WLAN according to one embodiment makes terminals a group based on at least one of the terminals' service property and traffic property, allocates group information to wake each group of the grouped terminals in a different time, and transmits at least one of group DTIM (delivery traffic indication map) information and buffered data based on the allocated group information. [Reference numerals] (210) Grouping unit;(220) Group information allocation unit;(221) Transmission period determination unit;(223) Identification generator;(225) Group counter;(227) Offset counter;(230) Transmission unit;(240) Reception unit