IEEE P802.11 Wireless LANs Comment Collection LB200 MAC for Subclause 8.4.2.170j and 9.41.4 Date: 2014-25-02 Author(s): Name Affiliation Address Phone email Chittabrata Ghosh Nokia 2075 Allston Way, Suite 200, Berkeley, CA chittabrata.ghosh@nokia.com Yongho Seok LGE yongho.seok@lge.com CID Page Clause Comment Proposed Change Decision 1423 97.08 8.4.2.170j TWT grouping is an optional feature while it exists by defult in the TWT IE and it is 3 octet. It should be present only if the Grouping is in use. Make the TWT group Assignment field optionally present Revised - TGah editor to make changes shown in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 1424 99.39 8.4.2.170j There are multiple Group ID defined in the text with different resolutions for example Group ID defined in page 49 line 56 has 6 bits resolution while Group ID defined in page 124 line either use the same definition through the text or use different for the "Group ID", e.g. "TWT Group ID" Revised - TGah editor to make changes shown in under the heading for CID 1423, 1424, 1626, 2139, 2187,
21 has 4 bits resolution and Group ID defined in page 99 line 39 has 8 bits resolution. 2188, 2189, 2190, 2191, 2192, 2701 1626 97 8.4.2.170j The concept of TWT Grouping can be utilized in defining TWTs of STAs with less overhead Consider defining a method of assigning TWTs using TWT grouping concept Revised - TGah editor to make changes shown in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 2139 99.41 8.4.2.170j the TWT Group ID field is not present change "in the TWT Group ID field" to "in the Group ID field of TWT element" Revised - TGah editor to make changes in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 2187 99.31 8.4.2.170j Multiple questions regarding the text specifying the TWT Group Assignment field in the paragraph in line 31 page 99, e.g., Please provide clarification to address the questions asked in this comment. Revised - TGah editor to make changes shown in under the heading for
under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 2190 99.40 8.4.2.170j There seems a problem with the sentence in line 40 page 99: if the Groud ID 0000000 means all the STAs in a TWT group, then how to identify the TWT group, i.e., all the STAs in which TWT group? Please clarify or just delete the sentence. Revised - TGah editor to make changes shown in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 2191 99.45 8.4.2.170j Use binary representation for binary numbers. in line 45 page 99, change "00010100" to "0b00010100" Revised - TGah editor to make changes shown in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 2192 99.49 8.4.2.170j There are multiple questions with the paragraph in line 49 page 99, including: 1. what is a TWT value? Is it the 8-byte Please revise the paragraph in line 49 page 99 at address the questions of this comment or just delete the paragraph. Revised - TGah editor to make changes shown in
concludes there are "at most" 2 STAs, ..... 2701 99.41 8.4.2.170j If Group ID is 0, then how do the STAs determine which TWT group id the signalling is intended for? Clarify how the group for singaling is determined when the group id field is 0 Revised - TGah editor to make changes in under the heading for CID 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, 2701 CIDs 1423, 1424, 1626, 2139, 2187, 2188, 2189, 2190, 2191, 2192, and 2701: Discussion: Please modify Table 8-191b in Page 97 / Line 52 as follows: 8-191b—TWT Command Reply field values TWT Command Reply field value Command Name Description when transmitted by a TWT requesting STA Description when transmitted by a TWT responding STA 000b Request TWT Reserved 001b Suggest TWT STA suggested TWT value Reserved 010b Demand TWT TWT requesting STA demanded TWT value Reserved 011b N/ATWT Grouping Reserved Reserved TWT responding STA suggests TWT Group parameters that are different from the suggested or demanded TWT parameters of TWT requesting STA