On 06/11/2020 12:35, Johannes Berg wrote:
External Email
On Mon, 2020-10-19 at 16:26 +0300, Shay Bar wrote:
According to the new IEEE802.11ax standard center frequency of the 160MHz
should be published in segment2 field of HT operation IE when using EXT NSS
(when supporting smaller number of NSS in VHT in 160MHz BW).
This patch adds the required support to mac80211, cfg80211 to parse it properly
according to the new style as appears in the new standard.
According to the new style, the AP should publish that its bw is 80MHz and not
160MHz.
A STA should conclude that an AP is working in 160MHz if it publishes
the center frequency of the 160MHz bandwidth in seg1 field of VHT operation IE
or seg2 field of HT operation IE.
Is this referring to D6.2 Table 26-9 "Setting of the VHT Channel Width
and VHT NSS at an HE STA transmitting the OM Control subfield"?
No, it is referring to IEEE P802.11-REVmd™/D5.0, September 2020 Table
9-81- "Setting of the Channel Width subfield and 160/80+80 BW subfield
at a VHT STA transmitting the Operating Mode field" (where it doesn't
refer to OM)
The nl80211.c change is also described in the first 3 rows of Table
9-274 "VHT Operation Information subfields".
