FIELD: wireless communication.
SUBSTANCE: first control information carries two fields and each of the two fields is used to indicate the channel state for the subchannel in the channel segment, to indicate the channel state for the channel with a larger bandwidth. First device generates first control information, where first control information comprises a first field and a second field, wherein the first field is used to indicate the channel status for the first subchannel in the first channel segment, and the second field is used to indicate the channel status for the second subchannel in the second channel segment; and the first device sends the first control information to the second device.
EFFECT: providing control information in accordance with existing standards with less load while meeting the requirement of a wider bandwidth.
10 cl, 12 dwg, 4 tbl
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