protocol, as defined in the proposed changes in doc 3197 27.9.1 SR mode is not defined: "A STA can select an OBSS_PDlevel during its operation SR mode." Also in P192L7. Revise or define SR mode. Revised – agree that SR mode is not clear. Clarify the text, by defining an and using this along the description of the protocol, as defined in the proposed changes in doc 5689 27.9.2.2 SR mode is not defined. It is better to define the mode in the beginning of this section. Define what exactly is SR mode. For example, " a mode that a STA operates in a PD level that is differnet from legacy PD threshold on OBSS PPDUs" Revised – Clarify the text, by removing SR mode, defining an and using this along the description of the protocol, as defined in the proposed changes in doc 9541 27.9.2.2 """If a STA chooses a specific OBSS_PD_{level} during its operation under SR mode, ..."" SR mode undefined." Define SR mode. Revised – Clarify the text, by removing SR mode, defining an and using this along the description of the protocol, as defined in the proposed changes in doc 3222 190.30 27.9.2.1 There should be an exception for response frames (e.g. CTS, ACK, and BA etc) here. Otherwise a STA ignores an OBSS TXOP whose intended recipient happens to be nearby, e.g. within -62dBm or -72dBm reach. This causes significant interference to the OBSS recipient which could have been ignored if response frames where excluded from OBSS-PD rule. Suggest to add exceptions for any response frame such as CTS, ACK, BA etc. The exception could be similar to the currently-listed exceptions for Public Action frames.
Illustration of the adjustment rules for OBSS_PD and TX_PWR The OBSS_PDlevel is applicable to the start of a 20 MHz PPDU received on the primary 20 MHz channel. The OBSS_PDlevel(40 MHz) which is applicable to the start of a 40 MHz PPDU received on the primary 40 MHz channel, the OBSS_PDlevel(80 MHz) which is applicable to the start of a 80 MHz PPDU received on the primary 80 MHz channel and the OBSS_PDlevel(160 MHz or 80+80 MHz) which is applicable to the start of a 160 MHz or 80+80 MHz PPDU, can be derived by the following equations: OBSS_PDlevel(40 MHz)= OBSS_PDlevel + dB OBSS_PDlevel(80 MHz)= OBSS_PDlevel + dB OBSS_PDlevel(160 MHz or 80+80 MHz) = OBSS_PDlevel + dB TXPWRref = 21 dBm for non-AP STAs. TXPWRref = 21 dBm for an AP with the Highest NSS Supported M1 subfield in the Tx Rx HE MCS Support of its HE Capabilities element field equal to or less than 1. TXPWRref = 25 dBm for an AP with the Highest NSS Supported M1 subfield in the Tx Rx HE MCS Support field of its HE Capabilities element field equal to or greater than 2. TXPWR is the STA transmission power in dBm at the antenna connector. NOTE—considering the antenna connector definition section 3.1.
OBSS_PD SR Disallowed SRG Information Present Value of SRG OBSS_PD_MIN Value of SRG OBSS_PD_MAX Spatial Parameter Set element not received Spatial Reuse Parameter Set element not received N/A* N/A* 0 N/A* N/A* 1 -82 + SRG OBSS PD MIN Offset -82 + SRG OBSS PD MAX Offset *Note: When SRG Information is not present, a STA cannot determine a PPDU to be SRG and so will not use SRG OBSS_PD_MIN or SRG OBSS_PD_MAX values. STAs which receive a Spatial Reuse Parameter Set information element from their associated AP that has a value of 1 in the SRP Disallowed subfield shall not perform SRP-based SR transmissions. The Spatial Reuse Parameter Set element is optionally present in Beacons, Probe Responses and (Re)Association responses.