Method and device for forming control signal comprising control field in wireless LAN system

1. A method in a wireless local area network (WLAN) system, comprising:

generating a physical layer protocol data unit (PPDU) including a first control field, a second control field, and a data field; and

transmitting the PPDU to at least one station through a transmission frequency band including at least one resource unit (RU),

wherein the first control field includes a first sub-field having 1-bit length,

wherein the first sub-field is related to whether a single RU to be transmitted through a full bandwidth of the transmission frequency band is allocated in the PPDU,

wherein the first control field further includes a second sub-field for the transmission frequency band,

wherein the second control field includes identification information for the at least one station, and

wherein presence of a RU signaling field related to allocation of the at least one RU in the second control field is determined based on whether the single RU is allocated in the PPDU, and the RU signaling field is not present in the second control field for the single RU being allocated in the PPDU.

2. The method of claim 1 , wherein the first control field is a high efficiency signal A (HE SIG-A) field, and the second control field is a high efficiency signal B (HE SIG-B) field.

3. The method of claim 1 , wherein the transmission frequency band is at least one of 20 MHz, 40 MHz, 80 MHz, or 160 MHz bands.

4. The method of claim 1 , wherein the first control field is followed by the second control field in the PPDU.

5. The method of claim 1 , wherein the identification information includes an association identifier (AID) of the at least one station.

6. The method of claim 1 , wherein a frequency band corresponding to the RU is contained in the transmission frequency band.

7. The method of claim 1 , wherein the RU includes at least one of 26, 52, 106, 242, 484, or 996 subcarriers.

8. A transmitting device of a wireless local area network (WLAN) system, comprising:

a radio frequency (RF) unit including at least one antenna to transmit a radio signal over a transmission frequency band including at least one resource unit (RU); and

a processor operatively coupled to the RF unit,

wherein the processor is configured for:

generating a physical layer protocol data unit (PPDU) including a first control field, a second control field, and a data field; and

instructing the RF unit to transmit the PPDU to at least one station through a transmission frequency band,

wherein the first control field includes a first sub-field having 1-bit length,

wherein the first sub-field is related to whether a single RU to be transmitted through a full bandwidth of the transmission frequency band is allocated in the PPDU,

wherein the first control field further includes a second sub-field for the transmission frequency band,

wherein the second control field includes identification information for the at least one station, and

wherein presence of a RU signaling field related to allocation of the at least one RU in the second control field is determined based on whether the single RU is allocated in the PPDU, and the RU signaling field is not present in the second control field for the single RU being allocated in the PPDU.

9. The transmitting device of claim 8 , wherein the first control field is a high efficiency signal A (HE SIG-A) field, and the second control field is a high efficiency signal B (HE SIG-B) field.

10. The transmitting device of claim 8 , wherein the transmission frequency band is at least one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz bands.

11. The transmitting device of claim 8 , wherein the first control field is followed by the second control field in the PPDU.

12. The transmitting device of claim 8 , wherein the identification information includes an association identifier (AID) of the at least one station.

13. The transmitting device of claim 8 , wherein a frequency band corresponding to the RU is contained in the transmission frequency band.

14. The transmitting device of claim 8 , wherein the RU includes at least one of 26, 52, 106, 242, 484, or 996 subcarriers.

15. A receiving device of a wireless local area network (WLAN) system, comprising:

a radio frequency (RF) unit including at least one antenna to receive a radio signal over a transmission frequency band including at least one resource unit (RU); and

a processor operatively coupled to the RF unit,

wherein the processor is configured for:

instructing the RF unit to receive a physical layer protocol data unit (PPDU) including a first control field, a second control field, and a data field; and

decoding the data field based on the first control field and the second control field,

wherein the first control field includes a first sub-field having 1-bit length,

wherein the first sub-field is related to whether a single RU to be received through a full bandwidth of the transmission frequency band is allocated in the PPDU,

wherein the first control field further includes a second sub-field for the transmission frequency band,

wherein the second control field includes identification information for the at least one station, and

wherein presence of a RU signaling field related to allocation of the at least one RU in the second control field is determined based on whether the single RU is allocated in the PPDU, and the RU signaling field is not present in the second control field for the single RU being allocated in the PPDU.

16. The receiving device of claim 15 , wherein the first control field is a high efficiency signal A (HE SIG-A) field, and the second control field is a high efficiency signal B (HE SIG-B) field.

17. The receiving device of claim 15 , wherein the transmission frequency band is at least one of 20 MHz, 40 MHz, 80 MHz, or 160 MHz bands.

18. The receiving device of claim 15 , wherein the first control field is followed by the second control field in the PPDU.