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Hi Alfred,
Please also add the following SP to the motion queue (PHY COBF)
Move to add the following in the 802.11bn SFD: Joint/cross-BSS sounding feedback is limited to UL OFDMA if >1 STA is sounded
Passed unanimously
Thanks, Ron
From: Sameer Vermani <000039a3734fa32e-dmarc-request@xxxxxxxxxxxxxxxxx>
Hi Alfred,
Please also add the following 3 to the motions queue (all based on document 11-25/0381r0)
Results of SP were 41Y/12N/32A
Passed unanimously
There shall be a frame-exchange before the COBF sounding between the two APs which will at-least serve the following goals:
Passed unanimously
Regards, Sameer
From: Sameer Vermani
Hi Alfred, Please add the following PHY motions (all reached consensus in PHY adhoc without any objections based on document 11-25/0083r1) to the motions queue:
• 802.11bn defines the concept of a sync-reference AP and a sync-follower AP for CFO correction in COBF • Sync-follower AP pre-corrections needed • For sequential sounding: • All the NDPs sent by it during sounding phase that are sent for the purpose of sounding the STAs in the other BSS (Mandatory) • For the NDPs sent by it for sounding the STAs in its own BSS, it is recommended but not mandatory that the sync follower AP pre-correct those NDPs • For joint sounding • All the NDPs sent by it during the sounding phase (Mandatory) • The COBF sync and COBF PPDU during transmission phase using the same frequency pre-correction value as the sounding phase, when it is the sharing AP • Sync-reference AP does not pre-correct during transmission phase when it is the sharing AP
• The sync-follower AP shall use the NDPA frame sent by the sync-reference AP to pre-correct the NDP frequency to be within a TBD range (e.g., 350Hz) of the sync-reference AP’s frequency • Applies to sequential and joint sounding • The pre-correction of cross-BSS NDP and joint NDP is mandatory • The pre-correction of in-BSS NDPs is recommended but not a mandatory requirement
• The sharing AP is the AP that transmits the final sync frame before the COBF PPDU • Regardless of who is the sync-reference • Note: This ensures a consistent protocol and a consistent behavior at sharing AP
• The shared AP always pre-corrects COBF PPDU based on the final sync • To bring the two APs within a TBD frequency range of each other (e.g., ~350Hz) • Note: Regardless of which AP is the sync-reference, this ensures consistent behavior at shared AP
Thanks, Sameer
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