Method and device for identifying channel information in wireless LAN system
Provided is a method for providing information related to at least one channel supported in a wireless local area network (WLAN) system. For example, an extreme high throughput (EHT) operation element may include information related to at least one channel in a first band supporting an EHT standard. A very high throughput (VHT) operation element may include information related to at least one channel in a second band supporting a VHT standard. A high throughput (HT) operation element may include information related to at least one channel in a third band supporting an HT standard. The EHT operation element may include information for a channel number related to at least one channel in the first band and information related to a primary channel in the first band.
1. A method in a wireless local area network (WLAN) system, the method comprising:
receiving, by a station (STA) from an access point (AP), a control message including information related to a basic service set (BSS),
wherein the control message includes an extreme high throughput (EHT) operation element including information related to an EHT standard, a very high throughput (VHT) operation element including information related to a VHT standard, and a high throughput (HT) operation element including information related to an HT standard,
wherein the VHT operation element includes information related to at least one first operating channel allocated for a transmission of a VHT physical protocol data unit (PPDU), the at least one first operating channel is included in at least one first band, and the at least one first band is at least one of a 2.4 GHz band, a 5 GHz band, or a 6 GHz band,
wherein the EHT operation elements includes a first field, a second field being contiguous to the first field, and a third field being contiguous to the second field,
wherein a value of the first field is determined as a number of bands supporting a transmission of an EHT PPDU minus the at least one first band,
wherein the second field indicates a frequency position of a Primary 20 MHz channel of the BSS,
wherein the third field includes an operating class sub-field and a channel number sub-field of at least one second operating channel which is not indicated by the VHT operation element, and
wherein the operating class sub-field indicates channel starting frequency information, channel spacing information, and behavior limit information of the at least one second operating channel;
acquiring information related to the at least one first operating channel and the at least one second operating channel; and
performing communication based on the acquired information.
2. The method of claim 1 , wherein the control message is a beacon message, a probe response message, or an association response message.
3. The method of claim 1 , wherein each of the first field, the second field, the operating class sub-field and the channel number sub-field has a length of one octet.
4. The method of claim 1 , wherein the second field is configured as 8 bits, and each of the 8 bits is corresponding to a 20 MHz channel within a 160 MHz channel.
5. A device in a wireless local area network (WLAN) system, the device comprising:
a transceiver configured to receive a wireless signal; and
a processor configured
to control the transceiver, wherein the processor is configured to receive, from an access point (AP), a control message including information related to a basic service set (BSS) through the transceiver,
wherein the control message includes an extreme high throughput (EHT) operation element including information related to an EHT standard, a very high throughput (VHT) operation element including information related to a VHT standard, and a high throughput (HT) operation element including information related to an HT standard,
wherein the VHT operation element includes information related to at least one first operating channel allocated for a transmission of a VHT physical protocol data unit (PPDU), the at least one first operating channel is included in at least one first band, and the at least one first band is at least one of a 2.4 GHz band, a 5 GHz band, or a 6 GHz band,
wherein the EHT operation elements includes a first field, a second field being contiguous to the first field, and a third field being contiguous to the second field,
wherein a value of the first field is determined as a number of bands supporting a transmission of an EHT PPDU minus the at least one first band,
wherein the second field indicates a frequency position of a Primary 20 MHz channel of the BSS,
wherein the third field includes an operating class sub-field and a channel number sub-field of at least one second operating channel which is not indicated by the VHT operation element, and
wherein the operating class sub-field indicates channel starting frequency information, channel spacing information, and behavior limit information of the at least one second operating channel;
to acquire information related to the at least one first operating channel and the at least one second operating channel, and
to perform communication based on the acquired information.
6. The device of claim 5 , wherein the control message is a beacon message, a probe response message, or an association response message.
7. The device of claim 5 , wherein each of the first field, the second field, the operating class sub-field and the channel number sub-field has a length of one octet.
8. The device of claim 5 , wherein the second field is configured as 8 bits, and each of the 8 bits is corresponding to a 20 MHz channel within a 160 MHz channel.