弧状列島,世界化,世界標準規格開発,IEEE 802.15TG4w,低電力,ワイドエリアネットワーク,LPWA,F２F ハノイ会合要約

●Meeting Achievements

• Resolved all SB comments
• Incorporated SB comments into draft D5
• Two motions for SB recirculation and formation of CRG
• Discussion on future schedule

●Sponsor Ballot Results

• BALLOT OPEN DATE:       19-Aug-2019
• BALLOT CLOSE DATE:      18-Sep-2019
• TYPE:   New
• DRAFT #:        D04
• COMMENTS:       21
• MUST BE SATISFIED COMMENTS:     3
• 
  
• RESPONSE RATE
• This ballot has met the 75% returned ballot requirement.
• 
  
• 79 eligible people in this ballot group.
• 59 affirmative votes
• 1 total negative votes with comments
• 1 negative votes with new comments
• 0 negative votes without comments
• 5 abstention votes: (Lack of expertise: 1, Lack of time: 3, Other: 1)
• ５９＋１＋１＋５＝６６
• 65 votes received = 82% returned　（65÷79＝0.82）
• 7% abstention　
• 
  
• APPROVAL RATE
• The 75% affirmation requirement is being met.
• 59 affirmative votes　（５９÷６５＝0.90）
• 1 negative votes with comments
• 
  
•  60 votes = 98% affirmative

●ロバーツルール投票方式によるBallot passes! 投票が通過しました！

・TG CRG Motion #38

• Move that Task Group TG4w requests 802.15 WG approve the formation of a Comment Resolution Group (CRG) for the Standards Association balloting of the P802.15.4w_D5 with the following membership: Joerg Robert (Chair), Charlie Perkins, Johannes Wechsler, and Hendricus De Ruijter. The 802.15.4w CRG is authorized to approve comment resolutions, edit the draft according to the comment resolutions, and to approve the start of recirculation ballots of the revised draft on behalf of the 802.15 WG. Comment resolution on recirculation ballots between sessions will be conducted via reflector email and via teleconferences announced to the reflector as per the LMSC 802 WG P&P.
• Moved by: Henk de Ruijter
• Seconded by: Johannes Wechsler
• Motion approved by unanimous consent

●TG4w Draft Schedule

Sep,2019,LB　Recirculation/SB

Nov,2019, SB Comment Resolution

?,2010, Submission to RevCom

●CRG Telephone Conferences

• CRG Telephone Conference:
  • Tuesday, Oct. 8th, 16:00 CEST
  • Duration max. 1h

●TG4w Agenda for November

• Approval of Meeting and CRG Minutes
• Schedule
• SB Comment Resolution
• Future Schedule
• AOB
• 2 slots requested

（出典）

https://mentor.ieee.org/802.15/documents

（出典）TG 802.15.4w September 2019 Closing Report,doc IEEE802.15-19-0458

●IEEE 802.15 WPAN™Task Group 4w (TG4w) Low Power Wide Area (LPWA) Overview概要

The task of this workgroup is defining a Low Power Wide Area Network (LPWAN) extension to the IEEE Std 802.15.4 LECIM PHY layer to cover network cell radii of typically 10-15km in rural areas and deep in-building penetration in urban areas. このワークグループのタスクは、IEEE Std 802.15.4 LECIM PHYレイヤーへの低電力ワイドエリアネットワーク（LPWAN）拡張を定義して、農村部で通常10〜15 kmのネットワークセル半径、都市部での建物内への深い浸透をカバーすることです。

It uses the LECIM FSK (Frequency Shift Keying) PHY modulation schemes with extensions to lower bit-rates (e.g. payload bit-rate typically < 30 kb/s). LECIM FSK（Frequency Shift Keying）PHY変調方式を使用し、低ビットレートに拡張します（たとえば、ペイロードビットレートは通常<30 kb / s）。

Additionally, it extends the frequency bands to additional sub-GHz unlicensed and licensed frequency bands to cover the market demand. さらに、周波数帯域を追加のサブGHz無認可および認可周波数帯域に拡張し、市場の需要に対応します。

For improved robustness in channels with high levels of interference, it defines mechanisms for the fragmented transmission of Forward Error Correction (FEC) code-words, as well as time and frequency patterns for the transmission of the fragments. 高レベルの干渉を伴うチャネルの堅牢性を向上させるために、前方誤り訂正（FEC）コードワードのフラグメント化された送信のメカニズム、およびフラグメントの送信の時間および周波数パターンを定義します。

Furthermore, it defines lower code rates of the FEC in addition to the K=7 R=1/2 convolutional code. Modifications to the Medium Access Control (MAC) layer, needed to support this PHY extension, are defined. さらに、K = 7 R = 1/2畳み込みコードに加えて、FECのより低いコードレートを定義します。 このPHY拡張をサポートするために必要なメディアアクセス制御（MAC）レイヤーへの変更が定義されています。

http://www.ieee802.org/15/pub/TG4w.html