CID Clause Page Comment Proposed Change Resolution 7245 Sigurd 8.4.1.49 70.15 Add reference to define sscidx sscidx is used in Table without definition. Add a note similar to the note found at the bottom of Table 8-53f: "NOTE - sscidx(.) is defined in Table 8-53j" PROPOSED RESOLUTION: Add the following note to the bottom of Table 8-53j. is defined in Table 8-53j (Number of subcarriers and subcarrier mapping)". 7239 Sigurd 8.4.1.48 61.24 Inconsistent notation: both N_STS and N_STS,NDP are used Replace "NDP with N_STS space-time streams" with "NDP with N_STS,NDP space-time streams" PROPOSED RESOLUTION: Accepted 7241 Sigurd 8.4.1.48 68.32 Clarify requirement Replace "includes subcarriers corresponding to the primary 20 MHz channel" with "includes only subcarriers corresponding to the primary 20 MHz channel" PROPOSED RESOLUTION: Accepted 7242 Sigurd 8.4.1.48 68.37 Clarify requirement Replace "includes subcarriers corresponding to the primary 40 MHz channel" with "includes only subcarriers corresponding to the primary 40 MHz channel" PROPOSED RESOLUTION: Accepted 7243 Sigurd 8.4.1.48 68.42 Clarify requirement Replace "includes subcarriers corresponding to the primary 80 MHz channel" with "includes only subcarriers corresponding to the primary 80 MHz channel" PROPOSED RESOLUTION: Accepted
7216 Wei Shi 8.4.1.48 62.01 8-53f shows the "structure" of a VHT Compressed Beamforming Report information. It is not clear (to me) that this is also the order in which information is sent. For example, Table 8-53d uses "Order". Please specify for Table that it is also the order in which information is sent. PROPOSED RESOLUTION: On p. 61.61, change "structure" to "structure and CID Clause Page Comment Proposed Change Resolution 7068 Brian Hart 22.3.11.4 A lot of overlap between para starting at L53 and para starting at L46 reduce dup PROPOSED RESOLUTION: Revised, see proposed text under CID 7068. 7067 Hart 22.3.11.4 "follow ... MU[0] NSTS ...MU[3] NSTS" is not correct Change to "follow ... MU[0] NSTS NSTS" PROPOSED RESOLUTION: Revised, see proposed text under CID 7068. 7275 Sigurd 22.3.11.4 Unclear sentence: "The space time streams for the STA follow the space time streams indicated by the MU[0] NSTS, MU[1] NSTS, ..., MU[3] NSTS fields in VHT-SIG-A1." Does this simply repeat the requirement in the previous sentence or is there something new to this? Clarify or delete sentence Revised text under CID 7068 has changed this to “MU[0] NSTS NSTS” so now it should be clear that this STA’s space-time streams will come after the streams assigned to smaller user position values. 7276 Sigurd 22.3.11.4 "VHT-LTF symbols in the MU transmission are used to measure not only the channel for the streams intended for the STA but also to Replace "are used" with "may be used" PROPOSED RESOLUTION: Revised, see proposed text CID 7068. time 3
7250 Sigurd 8.5.23.3 There is no statement on whether "Membership Status Array" and "User Position Array" should always be present or not. Add appropriate requirement Rejected DISCUSSION: The commenter is correct that is no explicit statement regarding the inclusion of the two fields, but inclusion of all fields in other frame formats in 8.5 is assumed unless it is explicitly stated that a field is optional. Therefore, it does not seem that an explicit statement is necessary here. PROPOSED RESOLUTION: Rejected CID Clause Page Comment Proposed Change Resolution 7274 Sigurd 22.3.11.1 Inconsistent use of "spatial streams" and "space-time streams". Text states: "With SU-MIMO beamforming, all spatial streams in the transmitted signal are intended for reception at a single STA. With DL-MU-MIMO beamforming, the space-time streams are divided between one or more STAs." Why "spatial streams" in one case (SU) and "space-time streams" in the other (MU)? Use streams" or "spatial streams" for both cases (either works). REVISE. Change “spatial streams” on 290.9 to “space-time streams”. CID Clause Page Comment Proposed Change Resolution
DISCUSSION: The sentence in question states: “For SU-MIMO beamforming, the steering matrix Qk is determined by the beamforming feedback matrix Vk”. The commenter is correct that this statement is too strong, for either SU or MU beamforming. PROPOSED RESOLUTION: On 288.12 change “is determined by” to “can be determined from” On 288.47 change “can be determined by” to “can be determined from” On 289.11 change “the beamformer uses this Vk,1 matrix to determine” to “the beamformer can use this Vk,1 matrix to determine” CID Clause Page Comment Proposed Change Resolution 7064 Brian Hart 22.3.11.1 288.28 u is usually used for user aka BFee Change i to u in the equation and below DISCUSSION: Commenter is correct that “u” is used for user indexing elsewhere in Clause 22, whereas in the 22.3.11.1 and 22.3.11.2 the indexes “i” and “j” are instead used. Furthermore, the indexing is “0,.., N_{u} – 1” instead of the “1, ..,. N_u” in this particular section. PROPOSED RESOLUTION: In 22.3.11.1 and 22.3.11.2 , change all “i” indexes to “u”, change all “j” indexes to “us”, and change all indexing “1, ..,. N_u” to “0,.., N_{u} – 1”. CID Clause Page Comment Proposed Change Resolution 7065 Hart 22.3.11.2 289.21 What is "MU BFer Capability"? Rewrite as "If STA advertizes SU BFer Capable equal to 1, BFer shall support blah1. If STA advertizes MU BFer Capable equal to 1, BFer shall support blah2."
DISCUSSION: The sentence question is: “The beamformer shall support all tone grouping values and shall support all codebook information based on MU Beamformer Capability.” The commenter is correct that this sentence is unnecessarily vague. PROPOSED RESOLUTION: Change last sentence in 22.3.11.2 to: “A beamformer advertising MU Beamformer Capability shall support all tone grouping values and all Codebook Information values.” CID Clause Page Comment Proposed Change Resolution 7218 Wei Shi 8.4.1.48 62.15 that that the value k (Pg61, line 35) has been defined as transmited LSB first should we not also apply this to Average SNRs in Table 8.53f? Please see comment. Delete the sentence “The value of k for each angle is transmitted LSB to MSB.” on p. 61.35. DISCUSSION: In the description of the VHT Compressed Beamforming Report it is stated: “The value of k for each angle is transmitted LSB to MSB.” Later in the same section the average SNR subfields are described as: “The Average SNR of Space-Time Stream i subfield in the Table 8-53f (VHT Compressed Beamforming Report information) is an 8-bit two's complement integer whose definition is shown in Table 8-53h (Average SNR of Space-Time Stream i subfield).” Clause 8.2.2 (Conventions) establishes that LSB to MSB is the default bit ordering in frame formats, it does not seem that an explicit not is needed to describe the average SNR subfields or the quantized angle subfields. PROPOSED RESOLUTION: Delete the sentence “The of k for each angle is transmitted LSB to MSB.” on p. 61.35.
CID Clause Comment Proposed Change Resolution 7015 Yongho Seok 10.40 "A STA that receives a Group ID Management frame with a RA matching its MAC address shall issue a PHYCONFIG_VECTOR primitive with the GROUP_ID_MANAGEMENT parameter based on the content of the received Group ID Management frame." If the message integrity check of protected Group ID management frame fails, the STA shall not issue a PHYCONFIG_VECTOR primitive with the GROUP_ID_MANAGEMENT parameter. Explain the procedure when the message integrity check of the Group ID management frame fail. 7016 Yongho Seok 10.40 STA sends an Acknowledgement frame after successfully receiving the Group ID management frame, regardless of the the message integrity check of the Group ID management frame. In that case, the Group ID One simple solution is that AP requests STA Statistic Report about MU PPDU transmission. On this purpose, add the following counters in dot11CountersGroup3. -