13563 27.9.3.1 297.01 By definition in Clause 3, Change SR PPDU Accept SR_PPDU with to SR_PPDU LEE underscore (not SR PPDU) is the correct description 12075 Jing 27.9.3.2 297.21 Even an HE STA Add the Revise TGax editor to – Ma identifies an SRP specification that make changes as opportunity, the MAC issues in 11-18/0026r5 that SR are marked with CID transmission may not 12075 which effectively work because of the to make the PHY change the phrase specification of the recheck the status ignore the “may interaction between the of the medium to MAC and PHY is not which is similar with issue a “may clear enough. Here, the OBSS-based SR HE STA may not be able operation(see which causes the to continue the backoff 27.9.2.1 General) discard of the incoming countdown within the HE PPDU. Note that TB PPDU duration despite the name of the because the medium SAP, the entire PHY is condition may indicated reset to an end of RX as BUSY until the end of state. The PHY then the ongoing HE TB reverts to a search PPDU. mode with sensitivity at -82 dBm, but Based on the PHY meanwhile, the energy receive procedure (see of the discarded PPDU 28.3.21 HE receive continues to arrive – procedure), when this energy will not signals come, the PHY cause a new detection measures signal power event at -82 dBm and issues because the preamble has passed. The channellist) to the MAC. discarded PPDU can After successfully only trigger BUSY receiving the HE-SIG-A, medium now based on the PHY issues ED, which is -62 dBm, and above that, no SR then set can take place. So the interaction between due to No MAC and PHY is Matched BSS color in completely specified in case of such a manner that the spatial reuse SR mechanism will here. operate correctly, Then the PHY may provided that the PPDU maintain being discarded is not at a level > -62 dBm. channellist) until the end of the current PPDU duration unless received. However, the MAC only ignores 27.9.3.1 DSRP_PPDU ) which means that the
13563 LEE 27.9.3.1 297.01 By definition in Clause 3, SR_PPDU with underscore (not SR PPDU) is the correct description Change SR PPDU to SR_PPDU Accept 12075 Jing Ma 27.9.3.2 297.21 Even an HE STA identifies an SRP opportunity, SR transmission may not work because of the specification of the interaction between the MAC and PHY is not clear enough. Here, the HE STA may not be able to continue the backoff countdown within the HE TB PPDU duration because the medium condition may indicated as BUSY until the end of the ongoing HE TB PPDU. Based on the PHY receive procedure (see 28.3.21 HE receive procedure), when signals come, the PHY measures signal power and issues channellist) to the MAC. After successfully receiving the HE-SIG-A, the PHY issues then set due to No Matched BSS color in case of spatial reuse here. Then the PHY may maintain channellist) until the end of the current PPDU duration unless received. However, the MAC only ignores 27.9.3.1 DSRP_PPDU ) which means that the Add the specification that the MAC issues to make the PHY recheck the status of the medium which is similar with OBSS-based SR operation(see 27.9.2.1 General) Revise – TGax editor to make changes as in 11-18/0026r5 that are marked with CID 12075 which effectively change the phrase “may ignore the to “may issue a which causes the discard of the incoming PPDU. Note that despite the name of the SAP, the entire PHY is reset to an end of RX state. The PHY then reverts to a search mode with sensitivity at -82 dBm, but meanwhile, the energy of the discarded PPDU continues to arrive – this energy will not cause a new detection event at -82 dBm because the preamble has passed. The discarded PPDU can only trigger BUSY medium now based on ED, which is -62 dBm, and above that, no SR can take place. So the interaction between MAC and PHY is completely specified in such a manner that the SR mechanism will operate correctly, provided that the PPDU being discarded is not at a level > -62 dBm.
11-18-0026-05-00ax-cr-srg-and-srp.docx