| CPC H04W 72/0446 (2013.01) [H04L 1/16 (2013.01); H04B 7/06 (2013.01)] | 18 Claims |

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1. A method, comprising:
generating, by a sending apparatus, a first frame; and
sending, by the sending apparatus, the first frame to at least two response apparatuses,
wherein the first frame comprises a time resource indication field that carries at least two pieces of sub-time resource indication information,
wherein the first frame further comprises a destination indication field that carries a broadcast address value,
wherein each piece of the sub-time resource indication information is in a one-to-one correspondence with one of the at least two response apparatuses, and
wherein each piece of the sub-time resource indication information comprises:
a time resource at which the corresponding response apparatus sends feedback information for the first frame to the sending apparatus, and
a time resource at which the sending apparatus sends acknowledgment information for the feedback information to the corresponding response apparatus.
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