Hi All,
Thank you for providing valuable feedback during the call on Feb 25.
Several members had reservations during the call on the use of “shall be able to” in subclause 35.3.4.3 (Non-AP behavior) of
252r1. I am initiating this discussion to gather more feedback.
When searching for the normative verb in REVmd 5.0 and 11ax D8.0, I found several examples of the use of “shall be able to”. I have cited a few examples below:
- REVmd5.0 P783,L7: “A STA shall be able to properly construct a subset of the frames specified in this clause for transmission and to decode a (potentially different) subset
of the frames specified in this clause upon validation following reception.”
- REVmd5.0 P1717,L34: “ … a non-DMG STA shall be able to interpret Control frames with the Subtype subfield equal to RTS or CTS, and a DMG STA shall be able to interpret Control
frames with the Subtype subfield equal to RTS or DMG CTS.”
- REVmd5.0 P1842,L57: “A QoS STA shall be able to process received QoS Data frames with subtypes that include +CF-Ack …”
- 11axD8.0 P479,L14:
“A STA that is operating in an HE BSS ... shall be able to receive at each of the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and NSS Set field in the HE Capabilities parameter of the MLMESTART.request primitive.”
- 11axD8.0 P498,L42:
“The non-AP STA shall be able to receive its intended spatial streams in a DL MU-MIMO transmission with a total number of spatial streams across all users of at least 4.”
Based on the above, since the statements in clause 35.3.4 are in similar contexts I am inclined to keep the normative verb in the subclause as-is, i.e., keep the “shall be able to”. Kindly let me know your thoughts.
Thanks,
Gaurang
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