doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [PHY Proposal] Date Submitted: [July 2003] Source: [Ed Callaway] Company: [Motorola] Address: [8000 W. Sunrise Blvd, Plantation, Florida, 33322, USA] Voice:[ ], FAX: [ ], Re: [ IEEE ] Abstract:[This contribution proposes an alternate PHY for TG4.] Purpose:[To encourage discussion.] 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

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 2 Forces on TG4 since the 11/00 PAR-1 European expansion of 868 MHz band in process The Banding Branding Problem: Potential market confusion between the two existing PHYs difficult to overcome; may affect investment in the industry 1% duty cycle of present 868 MHz band limits throughput and sleep time with present low data rate PHY

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 3 Forces on TG4 since the 11/00 PAR-2 Additional WPAN applications (consumer remote control displaying channel, audio or low resolution video capture; security systems displaying low quality still image capture, 16 kbps encoded audio for voice recognition remotes, PC peripherals, toys, games, and automation and control systems) have been identified by ZigBee, that cannot be served by the existing 20/40 kb/s data rate. Chip vendors have informally proposed nonstandard dual band chips, using 2.4 GHz modulation scheme at 915 MHz, to get higher data rates there.

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 4 Proposal Create a new PHY for that employs the 2.4 GHz modulation scheme on the MHz and MHz bands, but at half the chip rate: –A single 125 kb/s channel centered at MHz (Channel k = 27). –Ten 125 kb/s channels at * (k – 28) MHz (k = 28 – 37, overlaying the existing channels).

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 5 Spectral Plot of 0 dBm 125 kb/s Signal

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 6 Adjacent Channel Spectra

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 7 Features of Our Proposal-1 A multiband TG4 transceiver becomes much easier to build. Such a device could eliminate interoperability problems and resulting market confusion. Users of the MHz band get a 3x increase in data rate, without a reduction in the number of available channels.

doc.: IEEE /189r0 Submission July 2003 Ed Callaway, Motorola Slide 8 Features of Our Proposal-2 Advantage is taken of the expanded 868 MHz band, giving European users a 6x increase in data rate. Economy of scale, greater purchasing leverage via reduced sourcing costs, and faster design cycle benefits are gained by the OEM.