IEEE P802.11 Wireless LANs CR for OBSS_PD SR Date: 2017-12-7 Author(s): Name Affiliation Address Phone email Laurent Cariou laurent.cariou@intel.com Introduction Interpretation of a Motion to Adopt A motion to approve this submission means that the editing instructions and any changed or added material are actioned in the TGax Draft. The introduction and the explanation of the proposed changes are not part of the adopted material. Editing instructions formatted like this are intended to be copied into the TGax Draft (i.e. they are instructions to the 802.11 editor on how to merge the text with the baseline documents). TGax Editor: Editing instructions preceded by “TGax Editor” are instructions to the TGax editor to modify existing material in the TGax draft. As a result of adopting the changes, the TGax editor will execute the instructions rather than copy them to the TGax Draft. CID Commenter Comment Proposed Change Resolution Jinjing Jiang Is there a mode on Please clarify Rejected – the commenter failed to identify an issue Graham Smith "There are two independent spatial reuse modes, one called OBSS_PD-based spatial reuse and the other called SRP-based spatial reuse." Bad wording, replace. Replace ""There are two independent spatial reuse modes, one called spatial reuse and the other called SRP-based spatial reuse." with "There are two independent spatial reuse modes: OBSS_PD and SRP." Rejected – OBSSPD and SRP don’t define the SR mode, but a threshold and a parameter field. The name of the SR mode has therefore been defined to be clear with that regard. use based 1 27.9
James Yee In the bullet "The received PPDU is an PPDU (see 27.2.2 (Intra-BSS and inter-BSS frame determination)) and the received PPDU is not a non-HT PPDU carrying a response frame (Ack, BlockAck or CTS frame), or the received PPDU contains a CTS and a transition from BUSY to IDLE occurred within the PIFS time immediately preceding the received CTS and that transition corresponded to the end of an inter-BSS PPDU that contained an RTS that was ignored following this procedure", it is not clear why the prior RTS can affect the STA's decision on later the received CTS and what if the this prior RTS is never received by the STA. Please clarify. Rejected – This defines that if you receive both the RTS and the CTS, you can still do SR. If you receive only CTS, you can not do SR. Yongho Seok "The received PPDU is an inter-BSS PPDU (see 27.2.2 (Intra-BSS and inter-BSS frame determination)) and the received PPDU is not a non-HT PPDU carrying a response frame (Ack, BlockAck or CTS frame),..." The prerequisite of the second condition is that the received PPDU is an inter-BSS PPDU. Because the Ack and CTS frame can't be classifed as an inter-BSS PPDU, the prerequisite of the second condition never be met. Please remove the unnecessay example. Change as the following: "The received PPDU is an PPDU (see 27.2.2 (Intra-BSS and inter-BSS frame determination)) and the received PPDU is not a non-HT PPDU carrying a response frame (BlockAck),..." Revised – partially agree with the commenter. Only BA can be classified as PPDU. Ack and CTS can not. Remove CTS and apply the changes as in doc 1852r0 8 BSS BSS
signal strength, which is used in the receive operation subclause. Apply the changes as in 1852r0. Yongho Seok "If the bandwidth of the received PPDU differs from MHz, then the of the OBSS_PDlevel is increased by log (bandwidth/20 MHz)." More exactly, apply a floor to a log. As in comment. Revised – not certain exactly what the commenter is requesting, but the term bandwidth has no reference, so formalizaing that term to CH_BANDWIDTH and removing the (MHz). Apply the changes proposed in doc 1852r0. Graham Smith "output of the antenna connector" What about printed antennas? Replace cited text with "at the input to the antenna" or better still check with 11md where this has come up. Rejected – “output of the antenna connector” is used throughout 802.11 2016. Osama Aboulmagd The two SRG OBSS_PD and Non-SRG OBSS_PD appear suddenly in the middle of page Need to at least introduce the terms and why two of them are needed. as in comment Revised – the terms are actually introduced sooner in the section. For clarity, the general section is now split in 2 subclauses to clarify the differences between SRG and non-SRG operation. Apply the changes as proposed in 1852r0. Yongho Seok "An AP may define SRG OBSS PD Min Offset and SRG OBSS PD Max Offset values that are used by its associated STAs and by the AP to derive an SRG OBSS_PD level for determining reception behavior for inter-BSS PPDUs that are determined to be SRG PPDUs." An AP can makes different SRG OBSS PD Min Offset and SRG OBSS PD Max Offset values for different SRG BSSs. For supporting this, an AP may include one or more Spatial Reuse Parameter Set element. Sepcify that an AP can include one or more Spatial Reuse Parameter Set element. Revised – agree with the commenter. Add a note and apply the changes as proposed in 1852r0.
Yusuke Tanaka "(including HE Trigger-Based PPDU)" should be "(including an HE TB PPDU, expect when the HE TB PPDU is triggered by a Trigger frame having the CS Required subfield set to 0)" As commented. Revised – agree with the comment. Apply the changes proposed in doc 1852r0. kaiying Lv Change to "including HE PPDU, except when the HE TB PPDU is triggered by a Trigger frame having the CS Required subfield set to 0" as comment Revised – agree with the comment. Apply the changes proposed in doc 1852r0. Chu the notes are too weak. Transferring them to normative requirement. Fix the issue mentioned in comment. Rejected – this is a note because the normative text above covers these conditions. These notes are just to clarify the normative text above. Qi Xue Add a normative text to cover the following two notes: NOTE 1--The STA can increase but not decrease the chosen SRG OBSS_PD level or non-SRG OBSS_PD level during an OBSS_PD SR transmit power restriction period. NOTE 2--The STA's power is always equal or lower than the minimum TXPWRmax among all TXPWRmax from ongoing OBSS_PD SR transmit power restriction periods. As in the comment Rejected – this is a note because the normative text above covers these conditions – see in particular, the equation 27-4. These notes are just to clarify the normative text above. Guoqing Li Note 1 is unnecessary. STA should be allowed to decrease its OBSS_PD level to be more conservative. This restriction does not not seem necessary. Remove NOTE 1. Revised – Agree that the note is confusing. Normative text seems clear enough. TGax editor to make changes identified by CID 11812 in doc 1852r0. Qi Xue Repeated Note 1 & Note 2 in lines 37-40 and lines 27-31 As in the comment Revised – agree with the comment. Apply the changes proposed in doc 1852r0. 27