1. A wireless communication method for an access point (AP) comprising:transmitting a trigger frame indicating simultaneous uplink data transmission of multi-users;
receiving uplink data transmitted by a plurality of terminals in response to the trigger frame; and
transmitting a block acknowledgement for the plurality of terminals having transmitted the uplink data,
wherein the trigger frame allocates at least one of a designated access slot and a random access slot for at least one terminal, and
wherein at least one of information about the number of designated access slot(s) and information about the number of random access slot(s) is indicated through the trigger frame.