critical networking using mesh wi-sun technology
TRANSCRIPT
© 2017 Silver Spring Networks. All rights reserved. 1
Critical networking using mesh Wi-SUN technology
Dr Simon Dunkley
© 2017 Silver Spring Networks. All rights reserved. 2
• Critical infrastructure requirements
• Wi-SUN Mesh architecture
• Wi-SUN technology
• Case studies
Content
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Critical infrastructure requirements
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Critical Infrastructure Has Critical Requirements
Reliable
Secure
Extensible
High
Performance
Scalable
Open
Standards
Cost Effective
Ubiquity
• Packet confirmation
• Authentication
• Broad coverage
• Heterogeneous terrain
• Availability of “Plan B”
• Authentication
• Privacy
• Integrity of packet
• Capex/opex flexbility
• Competitive £ per-bit
• SLA commitment
• Peer-to-peer
• Maturity of standards
• Range, capacity, coverage
• Flexible delivery model
• Proven scale – technical
and solution capabilities
• API support
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Wi-SUN mesh architecture
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What is a mesh? (1)
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Charts show 5,000 nodes forming two
optimal networks within 45 minutes
Topology: urban and suburban
Florida, USA
What is a mesh? (2)
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Smart Grid Example #1: Smart Metering -- Scale
Rule of thumb: 5000 meters per
access point.
Visibility to many, many neighbors
means diverse ingress/egress.
Resiliency: IPv6 Multi-Homing
across multiple access points.
Smart Meter Communications Can Create The Foundation For Smart Grid
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Rule of thumb: 5000 meters per
access point.
Visibility to many, many neighbors
means diverse ingress/egress.
Resiliency: IPv6 Multi-Homing
across multiple access points.
Smart Meter Communications Can Create The Foundation For Smart Grid
Smart Grid Example #1: Smart Metering -- Scale
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Proven Real World Performance
10
1480m
930m
1900m575m
Wi-SUN FAN characteristics:
• Massive scale, high data rates
• Sub-second end to end latency
• Long range, excellent penetration
• Standards-based security
• Multiple-vendor support
• Network management & provisioning
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Where Mesh Fits
High reliability
Ubiquitous coverage, unlimited range
Usable latency
Good speed & capacity
Scalability
Affordability
Security
Peer-to-peer connectivity
Things that move a lot
Super high bandwidth
applications (e.g. HD video
streaming)
Sparse, isolated end points
Low value and near-zero cost
Broadcasting as a primary mode*
Great when you need: Less well suited for:
Mesh is best suited for connecting critical infrastructure at scale
* Short-term limitation
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1. Based on publicly available data and known awards
2. Europe, for historical reasons, have high PLC deployments, all of which have performed poorly for wide-area coverage
3. Includes fiber, WiMax, & etc.
Mesh Architecture Proven as Dominant Networking for Smart Meters
Number of Electric AMI Awarded Endpoints Through Q1 2015, Millions1
3
North America
Mesh PLC Cellular Tower Other
ROW, excluding Europe2
Mesh PLC Cellular Tower Other3
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Spectrum availability in Europe
86
5
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0
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6
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5
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86
5
86
8
87
0
87
6
91
5
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Harmonised spectrumNational release
Spectrum availability in Europe
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Wi-SUN technology
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Wi-SUN: PHY and MAC options (1)
PHY (within 200kHz channel)
- DSSS
– 6.25kbps
- GMSK
– 50, 100, 150, 200kbps
- OFDM
– 50, 100, 150, 200, 300kbps
MAC
- Frequency agile (not spread spectrum)
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Wi-SUN: PHY and MAC options (2)
Time
Frequency
400ms max
MAC 1MAC 2
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Wi-SUN: PHY and MAC options (3)
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Wi-SUN features
• Spectrum efficiency
• RTS + CTS + Data ACK
– Avoids long wasted transmissions
• Sufficiently high rates allows meaningful data to be transmitted sub 1s
• APC
– Minimises radius of interference
– Able to achieve longer ranges when necessary
– Link history is persisted
• ‘Gear shifting’ minimises on-air transmission time
• Channel sensing and deferral for polite coexistence (Listen Before Talk)
• Edge computing
• Security
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• Proven, universal security algorithms and protocols
• Authentication, authorization, encryption
• Hardware protection and acceleration
• Role-based controls and policies
WAN Backhaul
Multi-level, End-to-End Security
Silver Spring network
IPsecSecurity
Layers
• 20+ year protection
• Reduce “wholesale attacks”
to “retail attacks”
• Mitigate physical threats
• Protect against insider threats
Comms Module
Cryptographic
Identity
20
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Application Layer
Link Layer
Firmware Upgrades
Back
Office
Only Provider of True End-to-end Security
20
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Case studies
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Value Added Insights Leveraging AMI Data
• Restoration assessment
- Assess network performance through outage reports
- Analysis, report and briefing on network and process
optimization
• Voltage assessment
- Assess network performance and adherence to acceptable
voltage levels
- Identify potential equipment failure
- Monitor equipment and configuration errors
- Analysis, report and briefing on network and process
optimization
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• Increase energy efficiency and customer
satisfaction
- Automated system with no need for customer behavior
change
• Achieve energy efficiency cost savings while
ensuring regulatory compliance
- Fast, reliable meter information improves accuracy of
voltage optimization
• Proven reduction in energy spend
- Reliably reduce voltage levels within regulated levels
Towards the Smart Grid
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Case Study: Enabling renewable energy sources
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Smart Grid to Smart City…..
Time
10s of
Millions
Millions
Smart
Grid
Networks
Smart City
Infrastructure
Networks
Devices
Open, standards-based, secure, reliable network platform
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Case Study: Smart Lighting and Transportation
• Smart city deployment
- NaaS across initial 20K lights within
City of Copenhagen
- Smart street lighting, transportation
and environmental sensors
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Case Study: Glasgow City Council
• Smart streetlight control
- Lights rolled out in three areas of the city
centre
- Combined with sensors to gather data and
modify dimming operation:
• Pedestrian footfall
• Vehicular traffic and
• Noise measurements
• Environmental sensors
• Results
- Light control linked into the city’s new
urban control centre
- Sensor data has been made available via
the city’s data portal
- Streetlight levels modified by street level
activity
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Case Study: Bristol Is Open
• Smart City services over lighting
infrastructure
- Mesh network rolled out using streetlight
infrastructure
- Services offered to City Council and trials to
third parties
- Control of 300 lights in prime areas
• Results
- ‘Traditional’ control of lights rolled out with
ease
- Excellent network coverage across city and
into buildings
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