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

Claim 7:
8. A method, comprising:
generating, by a second device, a frame in a first non-high throughput (non-HT) format or a frame in a first non-high throughput duplicated (non-HT duplicated) format, wherein:
the frame in the first non-HT format comprises first indication information, and the first indication information indicates whether to use at least three bits in a first seven bits of a scrambling sequence of the frame in the first non-HT format to indicate a bandwidth mode; or
the frame in the first non-HT duplicated format comprises first indication information, and the first indication information indicates whether to use at least three bits in a first seven bits of a scrambling sequence of the frame in the first non-HT duplicated format to indicate a bandwidth mode; and

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