13886 27.2.3 223.13 "An HE STA that has not Change as the Revise TGax editor to – received a Spatial following: make changes as Seok Reuse Parameter Set "An HE STA that shown in 11-18/0026r5 element from its has not transmitted that are marked with associated AP with a and not received a CID 13886 value of 1 in the SRG Spatial Information Present Parameter Set subfield shall not classify element to/from its any received PPDUs as BSS with a value of an SRG PPDU." 1 in the SRG An HE AP STA that has Information Present transmitted a Spatial subfield shall not Reuse Parameter Set classify any element is missed. received PPDUs as an SRG PPDU." SR Behavior Overview CIDs 802.11ax includes two The 802.11ax draft Reject There is no 11360 27.9 289.00 – spatial resue methods. should be modified doubt that the SRP SR Both methods are to remove at least mechanism is effective relatively complex and one of the SR when an opportunity to there are doubts about mechanisms. The use it is identified. The how well they work. It TG should be SRP mechanism relies appears both are confident that the on measured included because of remaiing information that might these doubts.. mechanism actually be subject to some Presumably the hope is works. If not then error, but engineering that one mechanism both mechanisms always must include does actually work. shoukd be margin for error. removed. However, standards are The OBSS PD SR supposed to be mechanism has been generally about proven, in various standardising proven situations, through mechanisms (preferably simulation, to be one to reduce effective in producing complexity and risk) or good outcomes. The mechanims that are standard of quality of known to work rather the evidence presented than standardising in support of the OBSS experiments. PD SR mechanism is no different than the standard that has been applied to various other features and functions which have been included in previously approved 802.11 standard amendments, and there are other features that have been included in the past that
13886 Seok 27.2.3 223.13 "An HE STA that has not received a Spatial Reuse Parameter Set element from its associated AP with a value of 1 in the SRG Information Present subfield shall not classify any received PPDUs as an SRG PPDU." An HE AP STA that has transmitted a Spatial Reuse Parameter Set element is missed. Change as the following: "An HE STA that has not transmitted and not received a Spatial Parameter Set element to/from its BSS with a value of 1 in the SRG Information Present subfield shall not classify any received PPDUs as an SRG PPDU." Revise – TGax editor to make changes as shown in 11-18/0026r5 that are marked with CID 13886 SR Behavior Overview CIDs 11360 27.9 289.00 802.11ax includes two spatial resue methods. Both methods are relatively complex and there are doubts about how well they work. It appears both are included because of these doubts.. Presumably the hope is that one mechanism does actually work. However, standards are supposed to be generally about standardising proven mechanisms (preferably one to reduce complexity and risk) or mechanims that are known to work rather than standardising experiments. The 802.11ax draft should be modified to remove at least one of the SR mechanisms. The TG should be confident that the remaiing mechanism actually works. If not then both mechanisms shoukd be removed. Reject – There is no doubt that the SRP SR mechanism is effective when an opportunity to use it is identified. The SRP mechanism relies on measured information that might be subject to some error, but engineering always must include margin for error. The OBSS PD SR mechanism has been proven, in various situations, through simulation, to be effective in producing good outcomes. The standard of quality of the evidence presented in support of the OBSS PD SR mechanism is no different than the standard that has been applied to various other features and functions which have been included in previously approved 802.11 standard amendments, and there are other features that have been included in the past that
11-18-0026-05-00ax-cr-srg-and-srp.docx