IEEE P802.11 Wireless LANs Comment Resolutions on Section 26.3.6 Timing-related parameters Date: 2016-04-25 Author(s): Name Affiliation Address Phone email Lin Yang Qualcomm, Inc. 5775 Morehouse Dr. San Diego, CA 92121 +1.858.845.5220 linyang@qti.qualcomm.com Bin Tian CID Clause Number Page Line Comment Proposed Change Resolution 279 26.3.6 83 26 HE--SIG-A field duration for extended range SU shall be 16us. Remove 8us option and TBD as in comment A technical solution has been provided. Instruction to editor: Please modify the text according to the change indicated under CID 279 839 26.3.6 83 29 In the repetition mode, HE-SIG-A symbols are repeated once in time. We can remove TBD in HE-SIG-A-R in timing-related constants table. Modify as "16 μs". 872 26.3.6 83 29 The content of the table 26-3 is not correct. The motion is passed that HE-SIG-A duration in an HE extended range SU PPDU is 16us. Change "8 μs or 16 μs (TBD)" to "16 μs = 4 × 4 μs" in this subclause.
1188 26.3.6 83 6 In Table 26-3, "T_SYM1" should be equal to "T_DFT,HE +T_GI1,Data" instead of Similarly, "T_SYM2" should be equal to and "T_SYM4" should be equal to Change "13.6us = T_GI,HE-LTF + T_GI1,Data" to "13.6 = Change "14.4us = T_GI,HE-LTF + T_GI2,Data" to "14.4 = Change "16us = T_GI,HE-LTF + T_GI4,Data" to "16 = Accepted: A technical solution has been provided. Instruction to editor: 1189 26.3.6 83 20 "T_L-STF" should be "T_L-LTF" Change "T_L-STF" to "T_L-LTF" Accepted: A technical solution has been provided. Instruction to editor: 1191 26.3.6 86 53 The HE Extended Range SU PPDU format shown in Figure 26-3 includes HE-SIG-A field and does not include HE-SIG-A-R field. So HE-SIG-A-R field should not be part of Pre-HE modulated fields. Delete from "Pre-HE modulated fields refer to the L-STF, L-LTF, L-SIG, HE-SIG-A, HE-SIG-A-R, and HE-SIG-B fields" Accepted: A technical solution has been provided. Instruction to editor: 1934 26.3.6 82 42 There is no definition of "pre-HE portion" Define Revised: “Pre-HE portion” here denotes pre-HE modulated fields as defined in Figure boundaries for HE PPDU fields. A technical solution has been provided. Instruction to editor: . Timing
1935 26.3.6 82 45 Use of "HE portion" in definition is wrong HE portion is defined in 26.3.9.1 as "The HE portion of HE format preamble consists of pre-HE modulated fields and HE modulated fields. The HE modulated fields consist of and HE-LTF fields.". Replace "HE portion" with "HE modulated fields and Data". Revised: HE modulated fields cover data field already. A technical solution has been provided. Instruction to editor: 1936 26.3.6 82 49 Use of "HE portion" in definition is wrong Replace "HE portion" with "Data". Accepted: A technical solution has been provided. Instruction to editor: 1937 26.3.6 83 7 Use "Base" or "Normal" consistently Replace "Normal GI symbol" with "Base GI symbol" Accepted: A technical solution has been provided. Instruction to editor: 1938 26.3.6 83 7 Meaning of "symbol interval" not clear. Replace "Symbol Interval" with "symbol duration". Also on lines 10 and 12. Rejected: Same term is also used in 11ac spec. It is better to keep it consistant with 11ac spec. 1940 26.3.6 83 38 Move definition of till definitions of HE-LTF-1X, and see comment Accepted: A technical solution has been provided. Instruction to editor:
1941 26.3.6 84 44 Duplicated text and wrong reference Lines 44-45 are a repetition of lines They should give a short description of Table 26-5 instead. 1942 26.3.6 85 52 Definition of for MU PPDU Do we need an explicit definition of N_STS for MU? The number will be explicitly included in TXVECTOR and HE-SIG-B anyway. Rejected: Both Nsts and Nss for MU defined here are used for mathematical description purpose, regardless how the values for these variables can be obtained. Note that they are used in 11ac spec for MU MIMO. 1943 26.3.6 86 10 Definition of N_SS for MU PPDU Do we need an explicit definition of N_SS for MU? The number can be derived from N_STS and STBC setting. 2345 26.3.6 85 56 The Table 26-6 should have N_{HE-SIG-A} entry. "N_{HE-SIG-A}" should be defined in Table 26-6 as follow: "The number of OFDM symbols in the HE-SIG-A field" Accepted: A technical solution has been provided. Instruction to editor: 2364 26.3.6 85 41 Add N_{user} as the number of in transmission which does not have RU index. As in comment. Rejected: is just a special case of Nuser,r. The variables defined in this table should be general variables used in math description.