IEEE P802.11 Wireless LANs P802.11ah LB200 some proposed resolutions for Clause 4 and ToD accuracy Date: 2014-5-14 Author(s): Name Affiliation Address Phone email 2-9-32 Nakacho, Mitsuru Yokogawa Electric Musashino-shi, Tokyo +81 422 52 5519 Iwaoka Co. 180-8750 Japan Proposed resolutons for Time of Departure accuracy CID Clause Comment Proposed Change Resolution 2543 24.3.17 A base document IEEE P802.11ac Insert subclause 24.3.17.5 Time of Reject. D5.0 defines 22.3.18.5 Time of Departure accuracy based on 22.3.18.5 of Withdrawn by Departure accuracy which is IEEE P802.11ac D5.0. commenter. important for the Timing Detailed proposed changes are provided in measurement specified in 10.24.5. 11/13-1316. The timing measurement is the base function for ranging (location) and time synchronization (IEEE Std 1588 and IEEE Std 802.1AS) and is important for Sensor STAs. It is necessary to specify the Time of Departure accuracy in 24.3.17. 2544 24.3.17 Annex T.2 needs to be modified to Add following new modification to the Revise. support S1G STA. subclause T.2 of the IEEE P802.11ac Changes from D5.0. 802.11ac are ---- not Change bullet l) in the 5th paragraph as implemented follows: in the Annex l) The Time Difference of Departure T.2 of the accuracy test is passed if both of the IEEE following conditions are met: P802.11mc 1) The RMS value of e is less than D2.5, because aTxPHYTxStartRMS when transmitting a they are VHT PPDU, a TVHT PPDU and an S1G related to the PPDU, or aTxPmdTxStartRMS otherwise. now-removed 2) aTxPHYTxStartRMS when PMD/PLCP. transmitting a VHT PPDU, a TVHT PPDU So, no and an S1G PPDU or aTxPmdTxStartRMS modification is otherwise is less than necessary. where the units of e, aTxPHYTxStartRMS when transmitting a
IEEE P802.11 Wireless LANs P802.11ah LB200 some proposed resolutions for Clause 4 and ToD accuracy Date: 2014-5-14 Author(s): Name Affiliation Address Phone email Mitsuru Iwaoka Yokogawa Electric Co. 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750 Japan +81 422 52 5519 Proposed resolutons for Time of Departure accuracy CID Clause Comment Proposed Change Resolution 2543 24.3.17 A base document IEEE P802.11ac D5.0 defines 22.3.18.5 Time of Departure accuracy which is important for the Timing measurement specified in 10.24.5. The timing measurement is the base function for ranging (location) and time synchronization (IEEE Std 1588 and IEEE Std 802.1AS) and is important for Sensor STAs. It is necessary to specify the Time of Departure accuracy in 24.3.17. Insert subclause 24.3.17.5 Time of Departure accuracy based on 22.3.18.5 of IEEE P802.11ac D5.0. Detailed proposed changes are provided in 11/13-1316. Reject. Withdrawn by commenter. 2544 24.3.17 Annex T.2 needs to be modified to support S1G STA. Add following new modification to the subclause T.2 of the IEEE P802.11ac D5.0. ---- Change bullet l) in the 5th paragraph as follows: l) The Time Difference of Departure accuracy test is passed if both of the following conditions are met: 1) The RMS value of e is less than aTxPHYTxStartRMS when transmitting a VHT PPDU, a TVHT PPDU and an S1G PPDU, or aTxPmdTxStartRMS otherwise. 2) aTxPHYTxStartRMS when transmitting a VHT PPDU, a TVHT PPDU and an S1G PPDU or aTxPmdTxStartRMS otherwise is less than where the units of e, aTxPHYTxStartRMS when transmitting a Revise. Changes from 802.11ac are not implemented in the Annex T.2 of the IEEE P802.11mc D2.5, because they are related to the now-removed PMD/PLCP. So, no modification is necessary.
11-13-1316-08-00ah-p802-11ah-lb200-some-proposed-resolutions-for-clause-4-and-tod-accuracy.docx