Method for transmitting a PPDU in a transmission bandwidth and device for same
AssigneeLG Electronics Inc.
InventorsJinsoo Choi, Jinyoung Chun, Wookbong Lee, Dongguk Lim, Hangyu Cho
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Abstract
Provided are a method for transmitting data and a device using the same in a wireless LAN. A transmitter transmits a physical layer protocol data unit (PPDU) in a transmission bandwidth. The PPDU includes a first part to which a first fast Fourier transform (FFT) size is applied, and a second part to which a second FFT size is applied. The number of pilots of the second part is identical to the number of pilots of the first part, and the pilot frequency location of the second part is identical to the pilot frequency location of the first part.
Claims16
A method for transmitting a frame in a wireless Local Area Network (LAN), the method performed by a transmitter and comprising:
- generating a Physical layer Protocol Data Unit (PPDU) for a transmission bandwidth;
- and
- transmitting the PPDU via the generated transmission bandwidth to a receiver,
- wherein the PPDU includes a first portion and a second portion following the first portion,
- wherein the first portion includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signal field (L-SIG),
- wherein the second portion includes a high efficiency-SIG A (HE-SIG A), a high efficiency-SIG B (HE-SIG B), a high efficiency-STF (HE-STF), a high efficiency-LTF (HE-LTF), and a data field,
- wherein the first portion is generated based on a first FFT (fast Fourier transform) size and a first spacing between first subcarriers,
- wherein the second portion is generated based on a second FFT size and a second spacing between second subcarriers,
- wherein first pilots are preset among the first subcarriers and second pilots are preset among the second subcarriers,
- wherein the second FFT size is greater than the first FFT size,
- wherein the second subcarrier spacing is smaller than the first subcarrier spacing,
- wherein the number of second pilots is equal to the number of first pilots, and
- wherein second frequency positions of the second pilots is the same as first frequency positions of the first pilots.
A device for a wireless Local Area Network (LAN), the device comprising:
- a Radio Frequency (RF) unit configured to transmit and receive radio signals;
- and
- a processor connected to the RF unit, the processor configured to:
- generate a Physical layer Protocol Data Unit (PPDU) for a transmission bandwidth, and
- control the RF unit to transmit the PPDU via the generated transmission bandwidth to a receiver,
- wherein the PPDU includes a first portion and a second portion following the first portion,
- wherein the first portion includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signal field (L-SIG),
- wherein the second portion includes a high efficiency-SIG A (HE-SIG A), a high efficiency-SIG B (HE-SIG B), a high efficiency-STF (HE-STF), a high efficiency-LTF (HE-LTF), and a data field,
- wherein the first portion is generated based on a first FFT (fast Fourier transform) size and a first spacing between first subcarriers,
- wherein the second portion is generated based on a second FFT size and a second spacing between second subcarriers,
- wherein first pilots are preset among the first subcarriers and second pilots are preset among the second subcarriers,
- wherein the second FFT size is greater than the first FFT size,
- wherein the second subcarrier spacing is smaller than the first subcarrier spacing,
- wherein the number of second pilots is equal to the number of first pilots, and
- wherein second frequency positions of the second pilots is the same as a-first frequency positions of the first pilots.
Dependencies are inferred from the claim text.