Signaling method for multi-user transmission, and wireless communication terminal and wireless communication method using same
The present invention relates to a signaling method of a wireless LAN frame for multi-user transmission, and to a wireless communication terminal, and a wireless communication method using the same. To this end, provided are a wireless communication terminal, including: a transceiver; and a processor, wherein the processor is configured to: generate a frame including a first signal field and a second signal field, wherein the first signal field includes a bandwidth field indicating total bandwidth information in which the frame is transmitted, and the second signal field includes a resource allocation field indicating arrangement information of resource unit(s) in a frequency band through which the frame is transmitted, and transmit, by the transceiver, the generated frame and a wireless communication method using the same.
1. A station (STA) comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive a preamble of a PPDU (Physical layer Protocol Data Unit) from an access point (AP),
wherein the preamble includes a High Efficiency Signal A (HE-SIG-A) field and an High Efficiency Signal B (HE-SIG-B) field, and
wherein whether the HE-SIG-B field includes or does not include a resource allocation field indicating information of one or more resource units in a frequency band in which the PPDU is transmitted is identified based on whether an OFDMA (Orthogonal Frequency Division Multiple Access) is applied, when the PPDU is transmitted via MU (multi-user) transmission, and
receive a data of the PPDU from the AP.
2. The STA of claim 1 ,
wherein the HE-SIG-B field does not include the resource allocation field, when the OFDMA is not applied.
3. The STA of claim 1 ,
wherein the HE-SIG-B field includes the resource allocation field, when the OFDMA is applied.
4. The STA of claim 1 ,
wherein the HE-SIG-A field includes a predetermined field indicating whether the OFDMA is not applied when the PPDU is transmitted through the MU transmission.
5. The STA of claim 1 ,
wherein the HE-SIG-A field includes a bandwidth field indicating a total bandwidth in which the frame is transmitted.
6. The STA of claim 1 ,
wherein the HE-SIG-B field further includes one or more user fields indicating information of one or more terminals allocated to each resource unit constituting the frequency band.
7. The STA of claim 6 ,
wherein the user fields sequentially indicate information of the terminals allocated to each resource unit constituting the frequency band.
8. The STA of claim 6 ,
wherein the information of one or more resource units includes information on each size of the resource units and an arrangement of the resource units in the frequency band.
9. The STA of claim 6 ,
wherein the user field includes identifier information of a terminal allocated to one of the resource units and number of streams information.
10. The STA of claim 1 ,
wherein when the frequency band is divided into a plurality of subbands, the frequency band includes a combination of at least one of a first resource unit having a basic size, a second resource unit having a size based on twice the basic size, and a third resource unit having a size based on four times the basic size.
11. A wireless communication method of a station (STA), the method comprising:
receiving a preamble of a PPDU from an access point (AP),
wherein the preamble includes a High Efficiency Signal A (HE-SIG-A) field and an High Efficiency Signal B (HE-SIG-B) field, and
wherein whether the HE-SIG-B field includes or does not include a resource allocation field indicating information of one or more resource units in a frequency band in which the PPDU is transmitted is identified based on whether an OFDMA (Orthogonal Frequency Division Multiple Access) is applied, when the PPDU is transmitted via MU (multi-user) transmission; and
receiving a data of the frame from the AP.
12. The wireless communication method of claim 11 ,
wherein the HE-SIG-B field does not include the resource allocation field when the OFDMA is not applied.
13. The wireless communication method of claim 11 ,
wherein the HE-SIG-B field includes the resource allocation field when the OFDMA is applied.
14. The wireless communication method of claim 11 ,
wherein the HE-SIG-A field includes a predetermined field indicating whether the OFDMA is not applied when the PPDU is transmitted through the MU transmission.
15. The wireless communication method of claim 11 ,
wherein the HE-SIG-A field includes a bandwidth field indicating a total bandwidth in which the frame is transmitted.
16. The wireless communication method of claim 11 ,
wherein the HE-SIG-B field further includes one or more user fields indicating information of one or more terminals allocated to each resource unit constituting the frequency band.
17. The wireless communication method of claim 16 ,
wherein the user fields sequentially indicate information of the terminals allocated to each resource unit constituting the frequency band.
18. The wireless communication method of claim 16 ,
wherein the information of one or more resource units includes information on each size of the resource units and an arrangement of the resource units in the frequency band.
19. The wireless communication method of claim 16 ,
wherein the user field includes identifier information of a terminal allocated to one of the resource units and number of streams information.
20. The wireless communication method of claim 11 ,
wherein when the frequency band is divided into a plurality of subbands, the frequency band includes a combination of at least one of a first resource unit having a basic size, a second resource unit having a size based on twice the basic size, and a third resource unit having a size based on four times the basic size.