Method for transmitting control and training symbols in multi-user wireless communication system

摘要

The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result.

主权项

1. A method of transmitting a frame in a wireless local area network, the method comprising:
generating a legacy short training field (STF) used for at least one receiver to estimate an automatic gain control and a coarse frequency offset; generating a legacy long training field (LTF) used for the at least one receiver to estimate a fine frequency offset; generating a first Very High Throughput (VHT) control field including common control information common to each receiver; generating a VHT STF used for improving automatic gain control estimation in a wireless transmission; generating a VHT LTF used for estimating a wireless channel; generating a second VHT control field including specific control information specific to each receiver; generating the frame sequentially including the legacy STF, the legacy LTF, the first VHT control field, the VHT STF, the VHT LTF, the second VHT control field, and a data field; and transmitting the frame to the at least one receiver, wherein the specific control information includes information indicating a length of the data field.