1. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 San Filippo / RolfeSlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: SUN Coexistence Considerations Date Submitted: [7/14/2016] Source: [Will San Filippo] Company [Silver Spring Networks] [Benjamin A. Rolfe] Company [Blind Creek Associates] Address [] E-Mail: [wills@silverspringnet.com] Voice [] [ben@blindcreek.com] Voice:[+1.408.395.7207] Re: [] Abstract:Discussion on coexistence considerations with respect to the SUN application and operating environments. Purpose:Discussion within the task group TG4g. 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. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 San Filippo / RolfeSlide 2 Co-existence Discussion Smart Utility Networks (SUN)

3. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 3San Filippo / Rolfe Definition of Coexist: Coexist: Successfully operate in proximity to other wireless devices (15.4 Annex E) Views of coexistence: Tolerance of other systems in my space Impacts on other systems in my space Neighbors may be “like me” or “not like me”

4. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 4San Filippo / Rolfe TG4g Context

5. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 5San Filippo / Rolfe TG4g Context

6. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 6San Filippo / Rolfe Passive (static) Co-existence Characteristics of signals and environment Dedicated spectrum (licensed bands) Random channel access Channel alignment Low duty cycle (temporal diversity) Frequency diversity ‘Noise-like’ signal modulation Coding characteristics FEC etc…

7. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 7San Filippo / Rolfe Active (dynamic) Coexistence Active Interference Avoidance and Mitigation CCA Dynamic channel selection –Sense and avoid Adaptation –Transmit power control –Fragmentation –Channel masking (black-listing/white-listing) –etc. Piconet separation capability –Coding, timing, … Energy Detect, Scanning, etc. Cognitive Radio And so on….

8. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 8San Filippo / Rolfe Services to Consider Anything which might intentionally share the band(s) –Other IEEE in license exempt bands –Widely deployed non-IEEE standards or non-standard but known Anything which may unintentionally impact the band(s) –Broad spectrum unintentional radiators

9. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 9San Filippo / Rolfe Services to Consider Example bands: 800/900 MHz –802.15.4 –Proprietary systems 2.4GHz –802.15 (1,3,4), 802.11, –Proprietary radios –Microwave ovens –Plasma lights –And so on…

10. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 10San Filippo / Rolfe Mitigation: Existing Services Existing 802.15.4 (800/900 MHz or 2.4GHz) –Existing MAC features are available: Channel scan, ED, etc. CCA / CSMA Methods Low duty cycles –Enhanced MAC features Channel hopping –Can have coordinated coexistence Proprietary systems (Utility Networks) –Existing energy detect –Adaptive channel hopping –Can’t coordinate, may avoid

11. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 11San Filippo / Rolfe Mitigation: Existing Services 802.15.1 (Bluetooth) –Adaptive Frequency Hopping –Typically very low power –Need some “respect” (leave a little spectrum) 802.11 –Lots of devices in 2.4GHz –Can coordinate amongst other 802.11 devices –Has reasonable immunity to narrow band interferers (wide relative bandwidth) Other sources –Microwave ovens –Plasma lights –Pet collars

12. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 12San Filippo / Rolfe Coexistence Analysis Established Methodology –802.19 established methodology –Ongoing refinement Simulation –Potential impacts and footprints Measurement –Actual data is always best

13. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 13San Filippo / Rolfe Summary Co-existence is important now Co-existence isn’t likely to become less critical in the future We need to consider coexistence measures from the start in TG4g

14. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 14San Filippo / Rolfe Thanks Claude Shannon Without whom none of this would be plausible

15. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 15San Filippo / Rolfe Backup Slide: 802 Coexistence Requirements: defined in 802 P&P section 21 – http://ieee802.org/policies-and-procedures.pdf

16. SUN Coexistence Considerations Doc #: IEEE P802.15-09-0031-00-004g July 14, 2016 Slide 16San Filippo / Rolfe Backup Slide: 802 Coexistence From LMSC POLICIES AND PROCEDURES REVISED Page 41 21. Procedure for Coexistence Assurance If indicated in the five criteria, the wireless working group shall produce a coexistence assurance (CA) document in the process of preparing for working group letter ballot and Sponsor ballot. The CA document shall accompany the draft on all wireless working group letter ballots. The CA document shall address coexistence with all relevant approved 802 wireless standards specifying devices for unlicensed operation. The working group should consider other specifications in their identified target band(s) in the CA document. The 802.19 TAG shall have one vote in working group letter ballots that include CA documents. As part of its ballot comments, the 802.19 TAG will verify the CA methodology was applied appropriately and reported correctly. The ballot group makes the determination on whether the coexistence necessary for the standard or amendment has been met. A representative of the 802.19 TAG should vote in all wireless Sponsor ballots that are in the scope of the 802.19 coexistence TAG.