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 wireless communication terminal, the terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive a preamble of a wireless frame from an AP (access point),
wherein the preamble includes at least one of a first signal field or a second signal field,
wherein the first signal field includes a bandwidth field indicating a total bandwidth in which the wireless frame is transmitted and a specific field indicating OFDMA (Orthogonal Frequency Division Multiple Access) transmission or full-bandwidth MU (multi user)-MIMO (multi input multi output) transmission where the OFDMA transmission is not applied,
wherein the wireless frame is transmitted through one or more resource units in a frequency band indicated based on resource allocation information, and
wherein a resource allocation field of the second signal field related to the one or more resource units is not included in the preamble when the specific field indicates the full-bandwidth MU-MIMO transmission where the OFDMA transmission is not applied,
receive a data of the wireless frame from the AP.
2. The wireless communication terminal of claim 1 ,
wherein the resource allocation field of the second signal field is included in the preamble, when the specific field indicates the OFDMA transmission.
3. The wireless communication terminal of claim 1 ,
wherein the second signal field includes one or more user fields indicating information of one or more terminals allocated to each resource unit constituting the frequency band.
4. The wireless communication terminal of claim 3 ,
wherein the one or more user fields sequentially indicate information of the terminals allocated to each resource unit constituting the frequency band.
5. The wireless communication terminal of claim 3 ,
wherein the information of the one or more terminals includes information on each size of the resource units and an arrangement of the resource units in the frequency band.
6. The wireless communication terminal of claim 3 ,
wherein each of the one or more user fields includes identifier information of a terminal allocated to one of the resource units and number of streams information.
7. The wireless communication terminal 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.
8. A wireless communication method of a terminal, the method comprising:
receive a preamble of a wireless frame from an AP (access point),
wherein the preamble includes at least one of a first signal field or a second signal field,
wherein the first signal field includes a bandwidth field indicating a total bandwidth in which the wireless frame is transmitted and a specific field indicating OFDMA (Orthogonal Frequency Division Multiple Access) transmission or full-bandwidth MU (multi user)-MIMO (multi input multi output) transmission where the OFDMA transmission is not applied,
wherein the wireless frame is transmitted through one or more resource units in a frequency band indicated based on resource allocation information, and
wherein a resource allocation field of the second signal field related to the one or more resource units is not included in the preamble when the specific field indicates the full-bandwidth MU-MIMO transmission where the OFDMA transmission is not applied,
receive a data of the wireless frame from the AP.
9. The wireless communication method of claim 8 ,
wherein the resource allocation field of the second signal field is included in the preamble, when the specific field indicates the OFDMA transmission.
10. The wireless communication method of claim 8 ,
wherein the second signal field includes one or more user fields indicating information of one or more terminals allocated to each resource unit constituting the frequency band.
11. The wireless communication method of claim 10 ,
wherein the one or more user fields sequentially indicate information of the terminals allocated to each resource unit constituting the frequency band.
12. The wireless communication method of claim 10 ,
wherein the information of the one or more terminals includes information on each size of the resource units and an arrangement of the resource units in the frequency band.
13. The wireless communication method of claim 10 ,
wherein each of the one or more user fields includes identifier information of a terminal allocated to one of the resource units and number of streams information.
14. The wireless communication method of claim 8 ,
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.