Transmitting and receiving device and method in wireless communication system

• US 10,616,020 B2
• Filed: 07/02/2015
• Issued: 04/07/2020
• Est. Priority Date: 07/28/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Wookbong, Choi, Jinsoo, Park, Eunsung, Ryu, Kiseon, Lim, Dongguk, Cho, Hangyu
• Primary Examiner(s): Cho, Un C
• Assistant Examiner(s): Rahman, Shah M
• Application Number:
  US15/500,018
• Publication Number:
  US 20170272295A1
• Time in Patent Office: 1,741 Days
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 27/2628 Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators H04L27/2634 takes precedence
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Disclosed is a method for a station (STA) device transmitting data in a Wireless Local Area Network (WLAN) system. The method for transmitting data, according to one embodiment of the present invention, comprises the steps of: FEC encoding transmission data; interleaving the transmission data; constellation mapping the transmission data; performing IDFT on the transmission data; and upconverting the transmission data and transmitting a transmission signal, wherein IDFT is performed using different FFT sizes for a first part of the transmission signal and a second part of the transmission signal, and the second part of the transmission signal is allocated to at least one STA in units of at least one resource unit.

Claims

1. A method for transmitting data in a wireless local area network (WLAN) system, the method performed by a first station (STA) device and comprising:

generating a transmission signal comprising a first part and a second part; and

transmitting the generated transmission signal via a resource unit to at least a second STA;

wherein Inverse Discrete Fourier Transform (IDFT) is performed on the first part and the second part using different Fast Fourier Transform (FFT) sizes,

wherein the second part is allocated to the at least the second STA in units of at least one resource unit,

wherein the at least one resource unit is K times a minimum resource unit,

wherein K is an integer,

wherein the first part includes a high-efficiency-SIGNAL (HE-SIG) field comprising an indicator for a resource allocation mode,

wherein the resource allocation mode is a diversity mode or a resource allocation band-selection mode,

wherein one or more non-contiguous resource units in different 20 MHz subchannels of an entire bandwidth of the generated transmission signal are allocated to the at least the second STA when the diversity mode is configured,

wherein each portion of the one or more non-contiguous resource units includes at least one pilot tone,

wherein one or more contiguous resource units are allocated to the at least the second STA when the band-selection mode is configured,

wherein the at least one resource unit is interleaved using an interleaving scheme corresponding to N times the minimum resource unit,

wherein N is an integer less than or equal to P, and

wherein, when K is equal to P times N, the at least one resource unit is divided into P resource blocks, and each of the P resource blocks is interleaved using the interleaving scheme corresponding to N times the minimum resource unit.

2. The method of claim 1, wherein:

the first part further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signaling (L-SIG) field; and

the second part includes a data part.

3. The method of claim 2, wherein an IDFT/DFT period of the second part is four times an IDFT/DFT period of the first part.

4. The method of claim 1, wherein:

the at least one resource unit comprises a first resource unit of 26 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for a 1 MHz band.

5. The method of claim 1, wherein:

the at least one resource unit comprises a first resource unit of 52 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for a 20 MHz band.

6. The method of claim 1, wherein:

the at least one resource unit comprises a first resource unit of 114 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for a 40 MHz band.

7. The method of claim 1, wherein:

the at least one resource unit comprises a first resource unit of 242 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for an 80 MHz band.

8. The method of claim 1, wherein:

the at least one resource unit further comprises a first resource unit of 484 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for an 80 MHz band.

9. The method of claim 2, wherein a symbol interval of the second part per symbol is four times a symbol interval of the first part per symbol.

15. The method of claim 1, wherein:

encoded bits of data for transmission in the generated transmission signal are interleaved using an interleaver for the at least one resource unit when the at least one resource unit is allocated;

the encoded bits of data are distributed to M resource units using a segment parser when the M resource units are allocated;

the distributed encoded bits of data are interleaved within each of the M resource units using the interleaver, and

M is a positive integer greater than or equal to 2.

10. A station (STA) device transmitting data in a wireless local area network (WLAN) system, the STA device comprising:

a transceiver configured to send and receive a radio signal; and

a processor configured to;

generate a transmission signal comprising a first part and a second part; and

control the transceiver to transmit the generated transmission signal via a resource unit to at least a second STA,

wherein Inverse Discrete Fourier Transform (IDFT) is performed on the first part and the second part using different Fast Fourier Transfer (FFT) sizes,

wherein the second part is allocated to the at least the second STA in units of at least one resource unit,

wherein the at least one resource unit is K times a minimum resource unit,

wherein K is an integer,

wherein the first part includes a high-efficiency-SIGNAL (HE-SIG) field comprising information for a resource allocation diversity mode or a resource allocation band-selection mode,

wherein one or more non-contiguous resource units in different 20 MHz subchannels of an entire bandwidth of the generated transmission signal are allocated to the at least the second STA when the diversity mode is configured,

wherein each portion of the one or more non-contiguous resource units includes at least one pilot tone, and

wherein one or more contiguous resource units are allocated to the at least the second STA when the band-selection mode is configured,

wherein the at least one resource unit is interleaved using an interleaving scheme corresponding to N times the minimum resource unit,

wherein N is an integer less than or equal to P, and

wherein, when K is equal to P times N, the at least one resource is divided into P resource blocks, and each of the P resource blocks is interleaved using the interleaving scheme corresponding to N times the minimum resource unit.

11. The STA device of claim 10, wherein:

the first part further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signaling (L-SIG) field; and

the second part includes a data part.

12. The STA device of claim 10, wherein an IDFT/DFT period of the second part is four times an IDFT/DFT period of the first part.

13. The STA device of claim 10, wherein:

the at least one resource unit comprises a first resource unit of 26 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for a 1 MHz band.

14. The STA device of claim 10, wherein:

the at least one resource unit comprises a first resource unit of 52 tones; and

the first resource unit is interleaved using the corresponding interleaving scheme for a 20 MHz band.

16. The STA device of claim 10, wherein:

encoded bits of data for transmission in the generated transmission signal are interleaved using an interleaver for the at least one resource unit when the at least one resource unit is allocated;

the encoded bits of data are distributed to M resource units using segment parser when the M resource units are allocated;

the distributed encoded bits of data are interleaved within each of the M resource units using the interleaver, and

M is a positive integer greater than or equal to 2.

17. The STA device of claim 11, wherein a symbol interval of the second part per symbol is four times a symbol interval of the first part per symbol.