Patent ID: 8903441

Claim:
A method for uplink transmission in a wireless access system, the method comprising: receiving, by a terminal from a base station, a group configuration message including a multi-input multi-output (MIMO) mode set identifier (ID), the MIMO mode set ID indicating a MIMO mode set for a group in which the terminal is included, the group transmitting uplink data with open-loop (OL) multi-user (MU)-MUMO; receiving, by the terminal from the base station, a resource allocation message including a user bitmap, a resource offset and a resource allocation bitmap, the user bitmap indicating scheduled terminals in the group, the resource offset indicating a starting logical resource unit (LRU) for resource assignment to the group, and the resource allocation bitmap indicating a burst size and a resource size for each of the scheduled terminals; and transmitting, by the terminal to the base station, uplink data through resources signaled by the resource allocation message.