Patent ID: 8873461
Filing Date: 2014-10-28
Classification: H04W

Abstract:
1. A method for simultaneously transmitting packets having different lengths to two or more users in a wireless communication system, the method comprising: generating an aggregated medium access control (MAC) protocol data unit (A-MPDU) including a common field and the packets for the users, wherein the common field includes information to be commonly transferred to the users, the packets being transmitted to respective users; and transmitting the A-MPDU including the common field and the packets to the users, the packets being simultaneously transmitted to the respective users, wherein each of the packets includes symbols and information for recognizing a position of a symbol to which a tail field of each of the packets belongs, wherein the information for recognizing the position of the symbol to which the tail field belongs includes at least one of a maximum symbol number of the packets, a symbol number of transmission data of each of the packets, positional information of a last A-MPDU subframe, and positional information of a null delimiter according to a configuration of each of the packets, wherein the maximum symbol number of the packets is included in the common field, and wherein the maximum symbol number of the packets comprises a maximum symbol number required for transmitting training fields, signal fields, and data fields of the two or more users.