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: [CWPAN & ZA Presentation on IEEE802.15.4c Task Group Activities & OQPSK Advantages] Date Submitted: [Sept. 2007] Source: [Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt] Company: [ZigBee Alliance, Freescale Semiconductor, Integration Associates, Atmel] Address: [11 Louis Road, Attleboro, MA 02703 USA; 2100 E. Elliot Rd, MD: EL542, Tempe, AZ 85284, USA; 16 - 18 West Street, Reigate, Surrey RH2 9BS, United Kingdom; Königsbrücker Strasse 61, 01099 Dresden, Germany] Voice:[1-781-929-4832, 1-480-413-5413,1-480-413-4441, +44 1737 227728, +49 351 6523436], E-Mail:[bheile@ieee.org, clinton.powell@freescale.com, kuor-hsin.chang@freescale.com, pbeecher@integration.com, michael.schmidt@hno.atmel.com] Re: [ IEEE 802.15.4c ] Abstract: [Presentation at the CWPAN and ZigBee Alliance Joint mtg.] Purpose: [To encourage discussion.] 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. Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

2. IEEE 802.15.4e – Study Group Purpose • To explore the possibility of MAC enhancements to the existing 802.15.4 standard and determine if the formation of a Task Troup is needed. • If it is determined that a Task Group is needed the Study Group will define the Scope of the Task Group (via a PAR). Focus • MAC only. Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

3. IEEE 802.15.4c – Task Group Purpose • Extend the 802.15.4 standard to include the recently opened Chinese Sub-GHz Bands. Focus • Define a PHY standard that is compliant with Chinese regulations, limiting MAC changes only to those req’d. by the PHY. Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

4. .4c Currently Discussed Proposals Atmel, Freescale, Integration Associates • Joint proposal rebanding 900 MHz OQPSK PHY down to 779-787 MHz band (4 channels) & change pulse shaping filter CWPAN • New PHY, incompatible with existing 802.15.4 PHY(s) Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

5. CWPAN Major PHY D’s • PN Code • PN Codes are circular shifted by 1 instead of by 2 • PN Codes 8-15 are not complex conjugates of PN Codes 0-7 • PN Codes are floating-point numbers instead of binary numbers • PN Codes are not DC free • Based on technical input/guidance from IEEE 802.15.4c changes were made by the CWPAN to remove the DC offset, by addition of a DC removal block Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

6. CWPAN Major PHY D’s (cont’d.) • Mapping Data to PN Code • The same mapping is not used for preamble, SFD and data payload • Modulation • M-ary PSK and not OQPSK • Non Constant Envelope • Increases PA linearity requirement • Increases TX DAC and Rx ADC requirement Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)

7. OQPSK Advantages Proven Technology Implementation Ease Maximum Reuse of Existing 802.15.4 Sub-GHz World Wide Compatible PHY Bob Heile, Clint Powell, Kuor-Hsin Chang, Phil Beecher, Michael Schmidt (ZigBee Alliance, Freescale, Integration, Atmel)