Patent ID: 11930403
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method, comprising:
generating, by a second device, a frame, wherein:
when a first device is an extremely high throughput (EHT) site, the second device generates the frame to be in a first non-high throughput (non-HT) format or in a first non-high throughput duplicated (non-HT duplicated) format, wherein at least three bits in a first seven bits of a scrambling sequence of the frame in the first non-HT format indicate a bandwidth mode of a channel, or at least three bits in a first seven bits of a scrambling sequence of the frame in the first non-HT duplicated format indicate a bandwidth mode of a channel, and the channel is between the first device and the second device; or
when the first device is a very high throughput (VHT) site or a high efficiency (HE) site that does not support EHT, the second device generates the frame to be in a second non-HT format or in a second non-HT duplicated format, wherein two bits in a first seven bits of a scrambling sequence of the frame in the second non-HT format indicate a bandwidth mode of the channel, or two bits in a first seven bits of a scrambling sequence of the frame in the second non-HT duplicated format indicate the bandwidth mode of the channel; and

sending, by the second device to the first device, the frame, wherein sending the frame comprises:
sending, to the first device, the frame in the first non-HT format or the frame in the first non-HT duplicated format; or
sending, to the first device, the frame in the second non-HT format or the frame in the second non-HT duplicated format; and

wherein when the first device is the EHT site, and the frame is in the first non-HT format or in the first non-HT duplicated format, the channel comprises one primary 20 MHz subchannel and M secondary 20 MHz subchannels, M is greater than or equal to 3, each bit of the at least three bits corresponds to at least one secondary 20 MHz subchannel, and, for each bit of the at least three bits, a value of the respective bit indicates whether the corresponding 20 MHz secondary subchannel is available, and for each bit of the at least three bits, when the value of the respective bit is zero (0), the respective bit indicates that the corresponding secondary subchannel is available, and when the value of the respective bit is 1, the respective bit indicates that the corresponding secondary subchannel is unavailable.