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; and
a communication unit,
wherein the processor is configured to:
receive a preamble of a wireless packet including a High Efficiency Signal A(HE-SIG-A) field and a High Efficiency Signal B(HE-SIG-B) field through the communication unit,
wherein the HE-SIG A field includes a bandwidth subfield,
wherein the HE-SIG B field consists of a first at least one HE-SIG-B content channel and a second at least one HE-SIG B content channel,
wherein the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel includes a C26 subfield, 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
wherein the C26 subfield indicates whether a center 26-tone resource unit of 80 MHz is allocated according to a value of the bandwidth subfield when a bandwidth indicated by the bandwidth subfield is 80 MHz or more, and
receive a data of the wireless packet,
wherein the data is transmitted in the resource unit excluding an unassigned resource unit in the bandwidth, and
wherein the unassigned resource unit is identified within the bandwidth based on the RU allocation subfield, the C26 subfield and the STA ID subfield when the bandwidth indicated by the bandwidth subfield is 80 MHz or more.
2. The wireless communication terminal of claim 1 ,
wherein the first at least one HE-SIG B content channel and the second at least one HE-SIG-B content channel are transmitted separately in units of 20 MHz.
3. The wireless communication terminal of claim 1 ,
wherein a value of the C26 subfield is set to the same value for the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel when the bandwidth indicated by the bandwidth subfield is 80 MHz.
4. The wireless communication terminal of claim 3 ,
wherein a user field corresponding to the center 26-tone resource unit is carried in a user specific field of the first at least one HE-SIG-B content channel when the C26 subfield indicates that a user is allocated to the center 26-tone resource unit.
5. The wireless communication terminal of claim 1 ,
wherein the total bandwidth includes a first 80 MHz bandwidth and a second 80 MHz bandwidth when the wireless packet is transmitted in a total bandwidth of 160 MHz bandwidth,
wherein a first C26 subfield related to the first at least one HE-SIG-B content channel indicates whether a user is allocated to a first center 26-tone resource unit in the first 80 MHz bandwidth, and
wherein a second C26 subfield related to the second at least one HE-SIG-B content channel indicates whether a user is allocated to a second center 26-tone resource unit in the second 80 MHz bandwidth.
6. The wireless communication terminal of claim 1 ,
wherein each of the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel includes a subfield related to information of an unassigned resource unit.
7. A wireless communication method of a wireless communication terminal, the method comprising:
receiving a preamble of a wireless packet including a High Efficiency Signal A(HE-SIG-A) field and a High Efficiency Signal B(HE-SIG-B) field through the communication unit,
wherein the HE-SIG-A field includes a bandwidth subfield,
wherein the HE-SIG-B field consists of a first at least one HE-SIG-B content channel and a second at least one HE-SIG-B content channel,
wherein the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel includes a C26 subfield, 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
wherein the C26 subfield indicates whether a center 26-tone resource unit of 80 MHz is allocated according to a value of the bandwidth subfield when a bandwidth indicated by the bandwidth subfield is 80 MHz or more; and
receiving a data of the wireless packet,
wherein the data is transmitted in the resource unit excluding an unassigned resource unit in the bandwidth, and
wherein the unassigned resource unit is identified within the bandwidth based on the RU allocation subfield, the C26 subfield and the STA ID subfield when bandwidth indicated by the bandwidth subfield is 80 MHz or more.
8. The wireless communication method of claim 7 ,
wherein the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel are transmitted separately in units of 20 MHz.
9. The wireless communication method of claim 7 ,
wherein a value of the C26 subfield is set to the same value for the first at least one HE-SIG-B and the second at least one HE-SIG-B subfield when the bandwidth indicated by the bandwidth subfield is 80 MHz.
10. The wireless communication method of claim 9 ,
wherein a user field corresponding to the center 26-tone resource unit is carried in a user specific field of the first at least one HE-SIG-B content channel when the C26 subfield indicates that a user is allocated to the center 26-tone resource unit.
11. The wireless communication method of claim 7 ,
wherein the total bandwidth includes a first 80 MHz bandwidth and a second 80 MHz bandwidth when the wireless packet is transmitted in a total bandwidth of 160 MHz bandwidth,
wherein a first C26 subfield related to the first at least one HE-SIG-B content channel indicates whether a user is allocated to a first center 26-tone resource unit in the first 80 MHz bandwidth, and
wherein a second C26 subfield related to the second at least one HE-SIG-B content channel indicates whether a user is allocated to a second center 26-tone resource unit in the second 80 MHz bandwidth.
12. The wireless communication method of claim 7 ,
wherein each of the first at least one HE-SIG-B content channel and the second at least one HE-SIG-B content channel includes a subfield related to information of an unassigned resource unit.