124th IEEE 802.15 WSN MEETING
HOTEL IRVINE
IRVINE, CALIFORNIA, USA
January 13-17, 2020
Wednesday 15 January 2020
802.15 mid-session plenary meeting
10:32 Bob Heile (Decawave) called the meeting to order.
Announcements:
- Please don’t use 802.15 as your affiliation
- Reminder to book your room and register for the March plenary
TG 15.4w (lpwan) by Bob Heile (Decawave)
- draft “on hold” until 15.4 revision is published.
- Move that the WG approve forming a draft sharing arrangement between IEEE802.15.4w and ETSI LTN
- Moved by Ben Rolfe (Blind Creek Associates)
- Second by Rick Alfvin (Linespeed)
- Question: isn’t there a liaison MoU with ETSI? Reply: Yes
- Upon neither discussion nor objection the motion carries with unanimous consent.
（出典）
[16 January 2020]
[Pat Kinney]
[<Kinney Consulting LLC>]
[Chicago, IL]
IEEE.P.802.15
●IEEE 802.15 WPAN™Task Group 4w (TG4w) Low Power Wide Area (LPWA)
Overview
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.
It uses the LECIM FSK (Frequency Shift Keying) PHY modulation schemes with extensions to lower bit-rates (e.g. payload bit-rate typically
Additionally, it extends the frequency bands to additional sub-GHz unlicensed and licensed frequency bands to cover the market demand.
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.
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.
概要
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。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
(出典) http://www.ieee802.org/15/pub/TG4w.html
（注１）LPWA (無線)
LPWA (Low Power, Wide Area)、LPWAN (Low-Power Wide-Area Network) とは、Bluetoothなどの近距離無線（〜数十m程度）では満たせないカバレッジの無線アクセスの分類。低消費電力、低ビットレート、広域カバレッジを特徴とする。
LPWAの明確な定義は定まっていないが、「長距離のデータ通信」、「低消費電流」という2つの特徴を満たしている通信ネットワークがLPWAと呼ばれている[1]。
https://ja.wikipedia.org/wiki/LPWA_(%E7%84%A1%E7%B7%9A)
（注２）Decawave develops semiconductor solutions, software, modules and reference designs that enable real-time, ultra-accurate, ultra reliable local area micro-location services. Decawave is headquartered in Ireland, with regional headquarters in California and China, and a presence in South Korea, France and Japan.
Adelaide Chambers, Peter Street, Dublin, D08 T6YA, Ireland
https://www.decawave.com/products/
