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US 10,541,792 B2Granted
Physical layer protocol data unit format in a high efficiency wireless LAN
AssigneeNewracom, Inc.
InventorYongho Seok
Life of this patent
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Abstract
The present invention provides a new uplink (UL) Physical layer Protocol Data Unit (PPDU) frame format to support Multi-User Multiple Input Multiple Output (MU-MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA), and methods, apparatuses, etc. therefor. In an aspect of the present invention, a method by a station (STA) for transmitting an UL PPDU frame to an Access Point (AP) simultaneously with one or more other STAs in a Wireless Local Area Network (WLAN) may include receiving a frame including a parameter for the PPDU frame from the AP; and participating in UL MU PPDU frame transmission based on the parameter.
Claims20
A method for transmitting data to a plurality of Stations (STAs) by an Access Point (AP) in a Wireless Local Area Network (WLAN), the method comprising:
- generating a High Efficiency-Long Training Field (HE-LTF) for the plurality of STAs;
- and
- transmitting a Physical layer Protocol Data Unit (PPDU) frame to the plurality of STAs, the PPDU frame including the HE-LTF and a data field for the plurality of STAs,
- wherein the data field includes a plurality of subchannels in a frequency domain,
- wherein the plurality of subchannels are allocated to the plurality of STAs,
- wherein a starting point of the HE-LTF is the same across the plurality of STAs and an end point of the HE-LTF is same across the plurality of STAs
- wherein the HE-LTF includes one or more HE-LTF symbols,
- wherein the number of the one or more HE-LTF symbols is equal to or greater than a number of spatial streams transmitted in a subchannel having a maximum number of spatial streams across the plurality of subchannels,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is one, the number of HE-LTF symbols is equal to one,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an even number, the number of HE-LTF symbols is equal to the even number, and
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an odd number other than one, the number of HE-LTF symbols is equal to the odd number plus one.
8 more elements
A method for receiving data from an Access Point (AP) by a Station (STA) of a plurality of STAs in a Wireless Local Area Network (WLAN), the method comprising:
- receiving a High Efficiency-Long Training Field (HE-LTF) in a Physical layer Protocol Data Unit (PPDU) frame;
- and
- receiving data for the STA from a data field for the plurality of STAs in the PPDU frame,
- wherein the data field for the plurality of STAs includes a plurality of subchannels in a frequency domain,
- wherein the plurality of subchannels are allocated to the plurality of STAs, and
- wherein a starting point of the HE-LTF is the same across the plurality of STAs and an end point of the HE-LTF is the same across the plurality of STAs
- wherein the HE-LTF includes one or more HE-LTF symbols,
- wherein the number of the one or more HE-LTF symbols is equal to or greater than a number of spatial streams transmitted in a subchannel having a maximum number of spatial streams across the plurality of subchannels,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is one, the number of HE-LTF symbols is equal to one,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an even number, the number of HE-LTF symbols is equal to the even number, and
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an odd number other than one, the number of HE-LTF symbols is equal to the odd number plus one.
8 more elements
A wireless device, comprising:
- a transmitter circuit,
- wherein the wireless device is to:
- generate a High Efficiency-Long Training Field (HE-LTF);
- and
- transmit, using the transmitter circuit, a Physical layer Protocol Data Unit (PPDU) frame to a plurality of stations (STAs), the PPDU frame including the HE-LTF and a data field for the plurality of STAs,
- wherein the data field includes a plurality of subchannels in a frequency domain,
- wherein the plurality of subchannels are allocated to the plurality of STAs,
- wherein a starting point of the HE-LTF is the same across the plurality of STAs and an end point of the HE-LTF is same across the plurality of STAs
- wherein the HE-LTF includes one or more HE-LTF symbols,
- wherein the number of the one or more HE-LTF symbols is equal to or greater than a number of spatial streams transmitted in a subchannel having a maximum number of spatial streams across the plurality of subchannels,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is one, the number of HE-LTF symbols is equal to one,
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an even number, the number of HE-LTF symbols is equal to the even number, and
- wherein when the number of spatial streams transmitted in the subchannel having the maximum number of spatial streams across the plurality of subchannels is an odd number other than one, the number of HE-LTF symbols is equal to the odd number plus one.
10 more elements
Dependencies are inferred from the claim text.