COEXISTENT CHANNEL ACCESS METHOD
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Abstract
According to an embodiment of present invention, a method for transmitting a coexistent data stream, the method including: transmitting coexistent data stream transmission information including transmission power information of a first data stream targeted for a first station and transmission power information of a second data stream targeted for a second station in an environment in which the first station, a legacy station, coexists with a second station, a station supporting a wireless local area network (WLAN) system evolved further than the first station; and transmitting, by an access point (AP), the first and second data streams to the second station and the first station, wherein the AP transmits the first data stream with a higher transmission power level than that of the second data stream according to the coexistent data stream transmission information.
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Citations
27 Claims
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1-17. -17. (canceled)
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18. A method of transmitting a multiple input multiple output (MIMO) packet in a wireless local area network, the method comprising:
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generating a first short training field (STF) used for a receiver to estimate an automatic gain control and a coarse frequency offset; generating a first long training field (LTF) used for the receiver to estimate a fine frequency offset; generating a first signal field including a field indicating the receiver which receives the at least one data stream; generating a second STF used for improving automatic gain control estimation in a MIMO transmission; generating a second LTF used for estimating a MIMO channel; generating at least one second signal field including a length field indicating a length of each data stream; generating a data frame including the first STF, the first LTF, the first signal field, the second STF, the second LTF, the at least one second signal field and at least one data stream; and transmitting the data frame to at least one receiver. - View Dependent Claims (19, 20, 21, 22)
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23. A wireless device of transmitting a multiple input multiple output (MIMO) packet in a wireless local area network, the wireless device comprising:
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a process configured to; generate a first short training field (STF) used for a receiver to estimate an automatic gain control and a coarse frequency offset; generate a first long training field (LTF) used for the receiver to estimate a fine frequency offset; generate a first signal field including a field indicating the receiver which receives the at least one data stream; generate a second STF used for improving automatic gain control estimation in a MIMO transmission; generate a second LTF used for estimating a MIMO channel; generate at least one second signal field including a length field indicating a length of each data stream; generate a data frame including the first STF, the first LTF, the first signal field, the second STF, the second LTF, the at least one second signal field and the at least one data stream; and transmit the data frame to the receiver. - View Dependent Claims (24, 25, 26, 27)
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Specification