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Extension of 802.15.4 OFDM PHY for Utility Applications

This submission proposes a simple enhancement to the existing 802.15.4 standard to address the requirements derived from utility networking experience, including higher data rates and lower latency for certain applications. It aims to stimulate thought and identify potential enhancements to the standard.

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Extension of 802.15.4 OFDM PHY for Utility Applications

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Extension of the 802.15.4 OFDM PHY for utility applications Date Submitted: Sept 2017 Source: Benjamin A. Rolfe (Blind Creek Associates), Matthew Gillmore (Itron),Tim Godfrey (EPRI), Clint Powell (PWC/Utilities) Contact: Voice: +1 408 395 7207, E-Mail: ben.rolfe@ieee.org Re: Wireless Next Generation, Suggested enhancements to 802.15.4 Abstract: Presents requirements derived from utility networking experience which suggest modestly higher data rates for certain applications, and suggests simple enhancement to the existing standard to address these requirements. Purpose: Stimulate thought and identify potential enhancements. 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.

  2. Introduction • Requirements derived from utility use cases • Input from multiple utilities • Input from experienced vendors • Focus on enhancing/extending technologies and topologies which have been successful

  3. Repeating Themes • Utilities are asking for higher data rates • Require lower latency in mesh networks to support latency sensitive applications • <10ms per hop required in some applications • Applications with higher data volumes e.g. OTA updates. • Higher capacity of nodes in mesh networks • Expanding trade-off space for balancing bandwidth, interference footprint, delivery reliability. • Performance: Higher Rates & Adaptive RF link optimization • Mix of performance needs • Minimize Latency, effective use of spectrum, backward compatibility • Ability to adjust to changing RF conditions

  4. Points to increases in data rates • Modest increases – still low Mb/sec • Modest bandwidth usage/channel width • Flexible channelization • Just Right balancing point • OFDM 800 kbps, 1.2 Mbps, 2.4 Mbps • Compliment to lower rate (bandwidth) OFDM and FSK • Builds on what is working now

  5. Current OFDM options and MCS

  6. Example of obvious extension —

  7. Example: Obvious extensions • Multiple OFDM implementations commercially available • Existing implementations support MCS5 and MCS6 for all options already • Using modulation, coding, channelization already defined.

  8. What next? • We ask the Working Group to consider minor extension of the OFDM as suggested in our examples.

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