1. March 2010
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Proposed Resolution for comment #344 (and maybe others?)
Date Submitted: 17 March, 2010
Source: Emmanuel Monnerie Company Landis+Gyr
Address Mill Creek Avenue, Alpharetta, GA 30022
Voice: , emmanuel . landisgyr . com
Re: Comment Resolution for document # g-clause-6-fsk-phy-draft
Abstract: Proposed resolution for comment #344
Purpose:
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
Emmanuel Monnerie, Landis+Gyr

2. March 2010 :
An 868/915 MHz direct sequence spread spectrum (DSSS) PHY employing binary phase-shift keying (BPSK) modulation
An 868/915 MHz DSSS PHY employing offset quadrature phase-shift keying (O-QPSK) modulation
An 868/915 MHz parallel sequence spread spectrum (PSSS) PHY employing BPSK and amplitude shift keying (ASK) modulation
A 2450 MHz DSSS PHY employing O-QPSK modulation
4c:
779–787 MHz MPSK and O-QPSK
Emmanuel Monnerie, Landis+Gyr

3. => 2 alternate mandatory PHYs
March 2010
4d amendment
A 950 MHz direct sequence spread spectrum (DSSS) PHY employing binary phase-shift keying (BPSK) modulation
A 950 MHz PHY employing Gaussian frequency-shift keying (GFSK) modulation
=> 2 alternate mandatory PHYs
Emmanuel Monnerie, Landis+Gyr

4. (G)FSK Mandatory Modes for 4g
March 2010
(G)FSK Mandatory Modes for 4g
For 900 MHz ISM
Mandatory mode 50kbps FSK (PHY1)
Alternate Mandatory mode based on RS-232 data rate (38.4kbps for example) (G)FSK (PHY2)
For 2400–2483.5MHz ISM
Mandatory mode 50kbps FSK
MHz
Mandatory mode 5kbps GFSK
MHz
Mandatory mode 50kbps GFSK
MHz
869, , , MHz
Mandatory mode 10kbps GFSK
, MHz
Emmanuel Monnerie, Landis+Gyr

5. Deployment Scenarios in 900MHz band
March 2010
Deployment Scenarios in 900MHz band
2 mandatory PHY. A compliant device shall support one of the two or both
Therefore we have 3 types of devices:
Supporting only PHY1
Supporting only PHY2
Supporting both PHY1 and PHY2
Type 3 and Type 1 can interoperate
Type 3 and Type 2 can interoperate
Type 1 and Type 2 cannot interoperate. As presented in doc g, type 1 and type 2 are prevalent in already deployed systems. They are not collocated. New products and systems can easily support type 3 through an appropriate choice of crystal frequency (cf doc #187).
Type 3 shall use one of the two PHY as a default mandatory more.
Emmanuel Monnerie, Landis+Gyr

6. Benefits           1 PHY (Current) Co-Alternate PHY Comment
March 2010
Benefits
1 PHY (Current)
Co-Alternate PHY
Comment
Device Complexity & Cost  
New devices can select appropriate crystal frequencies allowing support for both PHY (see doc #187)
Deployment Constraints  
Legacy devices supporting 1 PHY cannot interoperate with another legacy device supporting only the other PHY.
Firmware Retrofit  
With the 2-PHY option, legacy devices using proprietary protocols can be upgraded via firmware update to become standard compliant.
Adoption of SUN standard  
SUN is more likely to be adopted by system implementers and Utilities with a 2-PHY option
NIST Framework  
2PHY allows the inclusion of a greater number of legacy devices in the list of standard compliant system, with minimal cost
Emmanuel Monnerie, Landis+Gyr