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: [Battery Operated Sensing Device Requirements for 802.15.4g] Date Submitted: [12 May 2009] Source: [Mark Thompson, Kendall Smith] Company [Aclara RF] Address [23905 Mercantile Rd., Beachwood, OH 44122] Voice:[+1.216.896.8552] E-Mail:[mthompson@aclara.com, ksmith@aclara.com] Re: [IEEE 802.15.4g Working Group] Abstract: Discussion of a proposal to add provisions for Battery Operated Sensing Devices. Purpose: To allow for battery operation in 802.15.4g network 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. Kendall Smith, Mark Thompson, Aclara RF

2. Aclara RF PHY • Our PHY is completely different • Not here to propose our PHY Kendall Smith, Mark Thompson, Aclara RF

3. What has worked? • Low background noise • High power signals • Slow data rates • Redundancy • Protection of radio channel(s) • Battery and powered endpoints • “Unlimited” scalability Kendall Smith, Mark Thompson, Aclara RF

4. Link Budget • +154 dBm Kendall Smith, Mark Thompson, Aclara RF

5. Battery Life • What do utilities want: • 20 year battery life • 10 years is too small • Service calls to replace batteries are unacceptable, endpoint should last as long as the equipment it is attached to • Millions of deployed devices in service Kendall Smith, Mark Thompson, Aclara RF

6. Battery Life • What techniques can be used in a MAC/PHY design to allow for long battery life • Fast network acquisition and association • lower freq = lower power = better propagation • Rx sense lower, overcome with tx power • short messages ~8 octets • allow one way operation Kendall Smith, Mark Thompson, Aclara RF

7. To Achieve Low Power • MAC changes that support the low energy devices must supported and pushed by the 4g group • TG4e Kendall Smith, Mark Thompson, Aclara RF

8. TG4e PAR • 5.2 Scope of Proposed Standard: The intent of this amendment is to enhance and add functionality to the 802.15.4-2006 MAC to a) better support the industrial markets and b) permit compatibility with modifications being proposed within the Chinese WPAN.Specifically, the MAC enhancements are limited to:• TDMA: to provide a) determinism, b) enhanced utilization of bandwidth• Channel Hopping: to provide additional robustness in high interfering environments and enhance coexistence with other wireless networks• GTS: to increase its flexibility such as a) supporting peer to peer, b) the length of the slot, and c) number of slots• CSMA: to improve throughput and reduce energy consumption• Security: to add support for additional options such as asymmetrical keys• Low latency: to reduce end to end delivery time Kendall Smith, Mark Thompson, Aclara RF

9. TG4e • 4e Low Energy Study Group • Thursday PM Session Kendall Smith, Mark Thompson, Aclara RF

10. Presentations Supporting Battery Ops • Aclara • NICT • Fuji • Mistubishi • TI • Sensus • Elster • Itron Kendall Smith, Mark Thompson, Aclara RF

11. TG4g – TG4e • Assuming Battery Operated Devices in initial SUN standard - then, MAC changes to TG4e relating to Low Energy operations must be completed in parallel • This is a critical and urgent component of 802.15.4g Kendall Smith, Mark Thompson, Aclara RF

12. Spectrum • PAR calls for license exempt spectrum frequency bands • Countries like Canada, Japan, and the UK are allocating dedicated use spectrum for utilities • Fits within the spirit of the PAR • The PHY should be able to use that flexible spectrum as it becomes available Kendall Smith, Mark Thompson, Aclara RF

13. What has worked? How to achieve in SUN? • Low background noise • High power signals • Slow data rates • Redundancy • Protection of radio channel(s) • Battery and powered endpoints • “Unlimited” scalability Kendall Smith, Mark Thompson, Aclara RF

14. Suggestions • Low background noise • Allow operation on “dedicated” or licensed bands • High power signals • Allow operation on “dedicated” or licensed bands • Slow data rates • Allow flexibility in speed / range tradeoffs Kendall Smith, Mark Thompson, Aclara RF

15. Suggestions • Redundancy • Allow increased range to permit economical redundancy • Protection of radio channel(s) • Allow operation on “dedicated” or licensed bands Kendall Smith, Mark Thompson, Aclara RF

16. Suggestions • Battery and powered endpoints • Insure that appropriate MAC changes are enacted with SUN release • Insure that power consuming behaviors are not mandated • “Unlimited” scalability Kendall Smith, Mark Thompson, Aclara RF

17. Thank you Kendall Smith, Mark Thompson, Aclara RF