METHOD AND DEVICE FOR TRANSMITTING DATA FOR PLURALITY OF STATIONS THROUGH PLURALITY OF BANDS IN WIRELESS LAN SYSTEM

• US 20180006781A1
• Filed: 01/22/2016
• Published: 01/04/2018
• Est. Priority Date: 01/22/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: CHOI, Jinsoo, CHO, Hangyu, LEE, Wookbong, RYU, Kiseon
• Granted Patent: US 10,461,901 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• 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 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Proposed are a method and a device for transmitting a signal including a data field in a wireless LAN. For example, an access point (AP) allocates, to a second station, a second frequency band adjacent to a first frequency band, wherein the second frequency band can include a plurality of resource units. In addition, a signal including the data field can be transmitted to the second station through the allocated second frequency band. Furthermore, when the first frequency band is allocated to the first station, the AP can allocate, to the second station, as a null resource unit, a resource unit adjacent to the first frequency band among the plurality of resource units.

Claims

1. A method for transmitting a signal including a data field in a wireless LAN, comprising:

allocating, by an access point (AP), a second frequency band being adjacent to a first frequency band to a second station, wherein the second frequency band includes a plurality of resource units; and

transmitting a signal including the data field to the second station through the allocated second frequency band,

wherein, in case the first frequency band is allocated to a first station, among the plurality of resource units, the AP allocates a resource unit being adjacent to the first frequency band to the second station as a null resource unit.

2. The method of claim 1, wherein at least one leftover tone is included between the plurality of resource units within a frequency domain.

3. The method of claim 1, wherein the first frequency band is allocated by a neighboring AP.

4. The method of claim 1, wherein each of the first frequency band and the second frequency band corresponds to a 20 MHz bandwidth.

5. The method of claim 1, wherein, in case the AP allocates a third frequency band being adjacent to the second frequency band to a third station, among a plurality of resource units being included in the third frequency band, a resource unit being adjacent to the second frequency band is used as a data signal for the third station, and

in case a neighboring AP allocates a third frequency band being adjacent to the second frequency band to the third station, among a plurality of resource units being included in the third frequency band, a resource unit being adjacent to the second frequency band is allocated as a null resource unit.

6. The method of claim 1, wherein the data field is included in a PPDU including a first part and a second part, wherein a first part of the PPDU is configured by a first point FFT calculation, wherein a second part of the PPDU is configured by a second point IFFT calculation, and wherein frequency bandwidths of the first part of the PPDU and the second part of the PPDU are configured to be equal to one another.

7. An access point (AP) for transmitting a signal including a data field in a wireless LAN, comprising:

a radio frequency (RF) unit transmitting and receiving radio signals; and

a processor being operatively connected to the RF unit,

wherein the processor is configured;

to allocate a second frequency band being adjacent to a first frequency band to a second station, wherein the second frequency band includes a plurality of resource units; and

to transmit a signal including the data field to the second station through the allocated second frequency band,

wherein, in case the first frequency band is allocated to a first station, among the plurality of resource units, the AP allocates a resource unit being adjacent to the first frequency band to the second station as a null resource unit.

8. The AP of claim 7, wherein at least one leftover tone is included between the plurality of resource units within a frequency domain.

9. The AP of claim 7, wherein the first frequency band is allocated by a neighboring AP.

10. The AP of claim 7, wherein each of the first frequency band and the second frequency band corresponds to a 20 MHz bandwidth.

11. The AP of claim 7, wherein, in case the AP allocates a third frequency band being adjacent to the second frequency band to a third station, among a plurality of resource units being included in the third frequency band, a resource unit being adjacent to the second frequency band is used as a data signal for the third station, and

in case a neighboring AP allocates a third frequency band being adjacent to the second frequency band to the third station, among a plurality of resource units being included in the third frequency band, a resource unit being adjacent to the second frequency band is allocated as a null resource unit.

12. The AP of claim 7, wherein the data field is included in a PPDU including a first part and a second part, wherein a first part of the PPDU is configured by a first point FFT calculation, wherein a second part of the PPDU is configured by a second point IFFT calculation, and wherein frequency bandwidths of the first part of the PPDU and the second part of the PPDU are configured to be equal to one another.

13. A method for transmitting a signal including a data field in a wireless LAN, comprising:

allocating, by a transmitting station, a second frequency band being adjacent to a first frequency band as a transmission band targeting an access point (AP), wherein the second frequency band includes a plurality of resource units; and

transmitting a signal including the data field to the AP through the allocated second frequency band,

wherein, in case the first frequency band is used by another transmitting station, among the plurality of resource units, the transmitting station uses a resource unit being adjacent to the first frequency band as a null resource unit.