January 2009 Doc # P802.15-09-0073- 01-004g G. Flammer Project: IEEE P802.15 Working Group for Wireless Personal Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Area Networks (WPANs) Submission Title: SUN Tutorial Summary (Jan 2009) Date Submitted: [07/04/22] Source: [George Flammer] Company [Silver Spring Networks] Address [] E-Mail: [gflammer @ silverspringnet.com] Voice [] Re: [] Abstract: Review of SUN tutorials from SG-NAN and beyond. 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.
Transcript
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)(WPANs)
Submission Title: SUN Tutorial Summary (Jan 2009)Date Submitted: [04/21/23]Source:
Abstract: Review of SUN tutorials from SG-NAN and beyond.
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.
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
Tutorial SummaryTutorial Summary
IEEE 802.15.4gLos Angles, California
January 21st, 2009
George Flammer – Silver Spring Networks
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
More SUNMore SUN
• Global requirement – Are we at a Tipping Point?• Frequencies – What will we have? What can we get?• Data rate - What is ‘fast enough’? • Latency - What is the killer app and what kills it?• Security issues - How much and where?
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
Tipping Point Tipping Point ‘Smart Utility Networks’ (aka, “Smart Grid”) at ‘tipping
point’ many reasons:– Demand for energy is growing rapidly while cost is rising – Security of energy sources highly problematical– Carbon costs of fossil energy are no longer acceptable– Adding new capacity slow and expensive– Experienced utility staff nearing retirement– Alternate energy sources require management– Energy efficiency happens ‘one user at a time’– Cost of SUN radios and processors continue trend downward– Smart Grid ‘stimulus’ plans currently on most developed
countries agenda
G. Flammer
January 2009 Doc # P802.15-09-0073-00-004g The top 25 markets by GDPThe top 25 markets by GDP
GDP Rank Country
GDP $B (PPP) Pop. (M)
GDP/ capita ($K)
Elec. Cons. (000 MWh)
Elec. Cons./ capita (kWH)
World $65,610 6,707 $10 16,830,000 2,509 European Union $14,430 491 $29 2,820,000 5,743
1 United States $13,780 304 $45 3,816,000 12,5602 China $7,099 1,330 $5 2,859,000 2,1503 Japan $4,272 127 $34 974,200 7,6534 India $2,966 1,148 $3 488,500 4265 Germany $2,807 82 $34 545,500 6,6236 United Kingdom $2,130 61 $35 348,700 5,7227 Russia $2,097 141 $15 985,200 7,0028 France $2,075 64 $32 451,500 7,0489 Brazil $1,849 196 $9 368,500 1,877
Top Ten Markets - FrequenciesTop Ten Markets - Frequencies
Country Sub-GHz Power (dBm)
US 902-928 30+
China 700, 840, 920 *
Japan 950 30+ (licensed)
India 867
Germany 867
UK 867
Russia 867 licensed
France 867
Brazil 902-907 & 915-928 30+
Italy 867
*Source: Regulatory status for using RFID in the UHF spectrum 20 January 2008 -EPC Global
G. Flammer
January 2009 Doc # P802.15-09-0073-00-004g
868 MHz868 MHz
Not much chance for a Smart Utility Network
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
Operational FrequenciesOperational Frequencies• The requirement is global – available frequencies are local• Frequencies are becoming available as Smart Utility Network
requirements are becoming known• Naturally competing with cellular and broadcast media
• SUN frequencies will be local, opportunistic, and variable in spectra, power levels, and sharing protocol (e.g. LBT, duty cycle, etc.)
Information on local regulations, requirements, and time frames is often quite hard to get and can be volatile.
The IEEE 802.15.4 community is perhaps uniquely positioned to establish a workable worldwide standard for SUN products and applications.
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
Speed – ‘fast enough’Speed – ‘fast enough’
Selection of data rate determines many of the most important parameters ‘under the SUN’
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer<George Flammer>, <Silver Springs Network>
Smart Utility Network – Process ControlSmart Utility Network – Process ControlSUN applications are best defined as wide area process control
• Complete ubiquity: every customer location connected - we do not typically get to relocate the SUN radio. • Low BW, (10 x 4kB per day)
• Latency tolerant (~10 second – faster if a human is waiting for answer)
• One can easily imagine what the 686MHz EU collision domain looks like!
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
US 902-928 MHz spectrum - RSSI measurements
Each sweep takes about 300 mS and each channel gets 60 averaged ‘reads’.
Two wideband signals are always present on channels 24 & 64
Strong SUN packets are displayed as blue.
Spectrum Measurements in SUNSpectrum Measurements in SUN
January 2009 Doc # P802.15-09-0073-01-004g
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Spectrum MeasurementsSpectrum Measurements
These charts spectrum plots are from four endpoints (meters) taken over several days.
Pink is good.
None of these plots show substantial traffic, interference, or noise.
January 2009 Doc # P802.15-09-0073-01-004g
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• Smart Utility Networks are multi-billion $/€/£ networks which reach everywhere there is energy being generated, transported, distributed, or consumed.
• SUN assets are of national import and demand concomitant security
• Open standards are most tested and robust
• 40 year+ design life
• No device is guaranteed physical protection
• There are 10s of millions of devices
• Like the Internet, the SUN requires security between actors – PHY / MAC security (if used) will be redundant and possibly obsolescent.
SUN Security Issues / AssumptionsSUN Security Issues / Assumptions
January 2009 Doc # P802.15-09-0073-01-004g
G. Flammer
SUN Summary
• Global Tipping point – we’re tipping NOW• Frequencies – opportunistic and local – collision domains• Data rate ‘fast enough’ & ‘far enough’• Latency “What is the killer app and what kills it?”– Requirements well known:
• DA (2 seconds – response to outages, prevent equipment damage)• On-demand reads (15 seconds – human patience limited)
• Capacity will constrain SUN – need to exploit all available frequencies
