Obviousness

The provided patent text for US10153886B2 includes a "Prior art keywords" section (listing "frame", "sta", "acknowledgement", "user", "transmission") and a "Prior art date" (2015-03-23). However, this section does not list any specific prior art references (e.g., other patent numbers, publications, or documents) that can be combined for an obviousness analysis under 35 U.S.C. § 103.

Without specific prior art references, it is not possible to identify combinations of such references or to explain the motivation for combining them to render the claims of US10153886B2 obvious to a person having ordinary skill in the art.