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 shown in 11-18/0026r2 SRP_PPDU-based SR that are marked with transmission may not CID 12075 which work because of the to make the PHY effectively change the specification of the recheck the status phrase ignore the “may interaction between the of the medium MAC and PHY is not which is similar with to clear enough. Here, the OBSS-based SR issue a “may HE STA may not be able operation(see to continue the backoff 27.9.2.1 General) which causes the countdown within the HE discard of the incoming TB PPDU duration PPDU. Note that because the medium despite the name of the condition may indicated SAP, the entire PHY is as BUSY until the end of reset to an end of RX the ongoing HE TB state. The PHY then PPDU. reverts to a search mode with sensitivity at Based on the PHY -82 dBm, but receive procedure (see meanwhile, the energy 28.3.21 HE receive of the discarded PPDU procedure), when continues to arrive – signals come, the PHY this energy will not measures signal power cause a new detection and issues event at -82 dBm because the preamble channellist) to the MAC. has passed. The After successfully discarded PPDU can receiving the HE-SIG-A, only trigger BUSY the PHY issues medium now based on ED, which is -62 dBm, then set and above that, no SR can take place. So the due to No interaction between Matched BSS color in MAC and PHY is case of completely specified in spatial reuse such a manner that the here. SR mechanism will Then the PHY may operate correctly, maintain provided that the PPDU being discarded is not channellist) until the end at a level > -62 dBm. 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, SRP_PPDU-based 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 shown in 11-18/0026r2 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.
11-18-0026-02-00ax-cr-srg-and-srp.docx