Wireless communication method and wireless communication terminal, which use discontinuous channel
The present invention relates to a wireless communication method and a wireless communication terminal using a non-contiguous channel. To this end, provided are a wireless communication terminal including a processor and a transceiver, wherein the processor receives a wireless packet through the communication unit, obtains total bandwidth information indicated via a bandwidth field of HE-SIG-A of the received packet, obtains information of an unassigned resource unit via at least one of the bandwidth field of the HE-SIG-A and a subfield of HE-SIG-B of the received packet, and decodes the received packet based on the total bandwidth information and the information of the unassigned resource unit and a wireless communication method using the same.
1. A wireless communication terminal, the terminal comprising:
a processor, wherein the processor is configured to:
receive a preamble of a physical layer protocol data unit (PPDU),
wherein the preamble includes an High Efficiency Signal A (HE-SIG-A) field including a bandwidth field related to bandwidth over which the PPDU is transmitted and an High Efficiency Signal B (HE-SIG-B) field,
wherein the HE-SIG-B field includes a resource unit (RU) allocation subfield related to allocating a resource unit and a station (STA) identifier (ID) subfield related to a STA to which the resource unit is assigned, and
receive a data of the PPDU based on the bandwidth field, the RU allocation subfield and the STA ID subfield,
wherein the data is transmitted in the resource units excluding unassigned resource unit in the bandwidth, and
wherein the unassigned resource unit is explicitly indicated with a specific value based on a combination of the bandwidth field, the RU allocation subfield and the STA ID subfield.
2. The wireless communication terminal of claim 1 ,
wherein the bandwidth field is related to a punctured channel in the bandwidth.
3. The wireless communication terminal of claim 1 ,
wherein a specific index value of the RU allocation subfield indicates the unassigned resource unit.
4. The wireless communication terminal of claim 1 ,
wherein the specific value is included in the STA ID subfield.
5. The wireless communication terminal of claim 1 ,
wherein the unassigned resource unit is a resource unit that is not allocated to any user.
6. The wireless communication terminal of claim 1 ,
wherein the HE-SIG-B field further includes C26 field indicating whether a center 26-tone resource unit of 80 MHz is assigned to a user, when the bandwidth is 80 MHz or more.
7. The wireless communication terminal of claim 6 ,
wherein the HE-SIG-B field comprises HE-SIG-B content channel 1 and HE-SIG-B content channel 2 in units of 20 MHz, and
wherein the C26 field is carried in both the HE-SIG-B content channel 1 and the HE-SIG-B content channel 2.
8. The wireless communication terminal of claim 7 ,
wherein both of a C26 field carried in the HE-SIG-B content channel 1 and a C26 field carried in the HE-SIG-B content channel 2 indicate whether the center 26-tone resource unit in the bandwidth of 80 MHz is assigned to the user, when the bandwidth is 80 MHz.
9. A wireless communication method of a wireless communication terminal, the method comprising:
receiving a preamble of a physical layer protocol data unit (PPDU),
wherein the preamble includes a High Efficiency Signal A (HE-SIG-A) field including a bandwidth field related to bandwidth over which the PPDU is transmitted and a High Efficiency Signal B (HE-SIG-B) field,
wherein the HE-SIG-B field includes a resource unit (RU) allocation subfield related to allocating a resource unit and a station (STA) identifier (ID) subfield related to a STA to which the resource unit is assigned;
receiving a data of the PPDU based on the bandwidth field, the RU allocation subfield and the STA ID subfield,
wherein the data is transmitted in the resource units excluding unassigned resource unit in the bandwidth, and
wherein the unassigned resource unit is explicitly indicated with a specific value based on a combination of the bandwidth field, the RU allocation subfield and the STA ID subfield.
10. The wireless communication terminal of claim 9 ,
wherein the bandwidth field is related to a punctured channel in the bandwidth.
11. The wireless communication terminal of claim 9 ,
wherein the specific value is included in the STA ID subfield.
12. The wireless communication terminal of claim 9 ,
wherein a null STA ID of the STA ID subfield indicates the unassigned resource unit.
13. The wireless communication terminal of claim 9 ,
wherein the unassigned resource unit is a resource unit that is not allocated to any user.
14. The wireless communication terminal of claim 9 ,
wherein the HE-SIG-B field further includes C26 field indicating whether a center 26-tone resource unit of 80 MHz is assigned to a user, when the bandwidth is 80 MHz or more.
15. The wireless communication terminal of claim 14 ,
wherein the HE-SIG-B field comprises HE-SIG-B content channel 1 and HE-SIG-B content channel 2 in units of 20 MHz, and
wherein the C26 field is carried in both the HE-SIG-B content channel 1 and the HE-SIG-B content channel 2.
16. The wireless communication terminal of claim 14 ,
wherein both of a C26 field carried in the HE-SIG-B content channel 1 and a C26 field carried in the HE-SIG-B content channel 2 indicate whether the center 26-tone resource unit in the bandwidth of 80 MHz is assigned to the user, when the bandwidth is 80 MHz.