Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 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 CompanyLandis+Gyr Address 30000 Mill Creek Avenue, Alpharetta, GA 30022 Voice: +1 678 641 1986, E-Mail: emmanuel . monnerie @ landisgyr . com Re: Comment Resolution for document # 5-10-0014-00-004g-clause-6-fsk-phy-draft Abstract: Proposed resolution for comment #344 Purpose: Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Emmanuel Monnerie, Landis+Gyr

2. 802.15.4-2006 • 802.15.4-2006: • 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. 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 • 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 • 450-470MHz • Mandatory mode 5kbps GFSK • 470-510MHz • Mandatory mode 50kbps GFSK • 863-870MHz • Mandatory mode 50kbps GFSK • 869, 896-901, 901-902, 928-960 1427-1518MHz • Mandatory mode 10kbps GFSK • 400-430, 950.1-955.7MHz • Mandatory mode 50kbps GFSK Emmanuel Monnerie, Landis+Gyr

5. 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 15-10-0187-01-004g, 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 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