the internet of important things - extreme challenges in connectivity
DESCRIPTION
Presentation at ISIC Surrey Workshop: "The Internet of Important Things - The challenges of connecting Things together", December 2011 Presenter: Richard Womersley of Helios [email protected] _______________________________________________________________________ Follow Helios via Linkedin, www.twitter.com/askhelios and www.facebook.com/askheliosTRANSCRIPT
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The Internet of Important Things
Extreme challenges in connectivity
‘Future Internet 2020’ – Example 1
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“Maria’s clothes are made of self-cleaning nanofabric but some still require a washing machine. Maria does not know what setting to use. To find the right washing cycle, the clothes talk to the washing machine, which in turn talks to the clothes manufacturer and the detergent manufacturer”
http://ec.europa.eu/information_society/activities/foi/library/docs/epr.pdf
‘Clothes that can talk to the washing machine’specification
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Parameter Requirement Notes
Size Wearer dependent
Power source Body heat Required to communicate when not being worn
Information stored Material type, size, manufacturer, age, previous washes, state of nano-repair
Only needed when requested
Communications range ~30 cm Wireless
Communications protocol One to one
Useful live Up to 10 years
Cost < £0.05 per item
Challenges for connectivity
• How does the machine knowwhich piece of clothing to interrogate?
• Who will develop the necessarystandards and protocols
• Could clothes communicate witheach other and with user?• “Don’t go to your left, there’s someone else
wearing the same outfit”• Should communication be restricted to
clothes – washing machine?
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‘Future Internet 2020’ – Example 2
“The hotel’s entertainment system provides suggestions for the next day based on their individual fitness profiles and forecasts of slope conditions. These forecasts are based on sensor data from biodegradable smart dust deployed in the winter sport area.”
‘Biodegradable smart dust’ specification
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Parameter Requirement Notes
Size ~ 1 mm³
Power source Solar Not required to operate during night hours
Sensors TemperatureHumidityColour / BrightnessMovement
Reporting every 15 minutes
Communications range ~10 cm Wireless
Communications protocol Mesh network
Useful Life 6 months Must have decomposed by 12 months
Cost < £0.0001 per ‘flake’
Challenges for connectivity
• Small amounts of data• Inefficient to use ‘IP’ to package this• Minimise transmissions to conserve power
• Millions of devices• Self-forming mesh network requires intelligence• Be ‘awake’ to relay incoming data
• Size of antenna• Tiny!• Range too small to
connect to a network• Range versus power
versus bandwidth
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Maximum number of ‘hops’
Rela
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At 8am, the Ski Resort polls the Smart Snow
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• Each device relays data it has stored:• Temperature: 8 bits• Humidity: 8 bits• Snow Colour: 24 bits• Movement: 24 bits (8 bits x 3D)
• 100 million devices per km²• Area of resort is 100 km²• Amount of data to be transferred:
• ~7 Gbytes• But it’s a mesh network with up to 6 hops so ~140 Gbytes
• Maximum transfer time 5 minutes• Resulting data transfer rate ~500 Mbit/second
‘Smart Dust’ – that’s silly talk
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Trivial examples illustrating a greater problem
• The data format used for the ‘Things’ on the internet will have to be carefully designed to meet the constraints of the particular ‘Thing’• IP may have far too much overhead (IP v6 header is 320 bits)• Connections may be increasingly server initiated• Connecting a ‘thing’ to an existing
network may be difficult• Wireless connectivity is essential• Individual pieces of data may be small,
but total data requirement is massive• Devices may or may not be intelligent• Security is paramount
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Current networks are not designed for the IoT
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• Networks assume data will grow and grow• but not necessarily that the size of ‘parcels’ may
shrink
• Wireless networks have greater capacity• but can’t cope with devices with very
limited range
• Devices will need to connect wirelessly• but there isn’t any spectrum set-aside for
the purpose
• Multiple protocols may be necessaryto support different ‘things’• but there is a drive towards fewer
Things are looking up
• Entrepreneurial companies are developing solutions that don’t take a ‘one size fits all’ approach• Developing bespoke protocols for particular data types• Finding novel ways to use available spectrum (eg white space)• Expanding the capability of existing
technologies (eg NFC, RFID)• Finding ways of generating power ‘out
of thin air’ (eg RF harvesting)
• Networks are thinking about theproblems• Charging regimes for data services
(eg one-off 2.5G/3G tariffs)• Dealing with ‘lumpy’ data (eg RSVP)
11 http://www.ralphtherobot.com/tag/things-are-looking-up/
Don’t forget security
• Millions of consumer devices will form Internets• Appliances• Cars• Household systems (heating,
lighting)• Industrial sensors and processes
• Whilst hacking into a washing machine or heating system might cause distress, hacking into an industrial system could cause loss of life
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What happens next?
• Flexible data protocols that can serve multiple purposes• to assist with interoperability between clothes, snow, washing
machines and humans
• Hierarchical wireless handling techniques• tiny devices support one standard only• bigger devices support more protocols• network nodes support higher level protocols (only?)
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Wider challenges
• There are a multitude of additional challenges facing ‘Things’• Finding and storing power• Making things small enough• Being able to communicate when small• Small, sensitive, sensors• Learning how to use the unimaginable amounts of data
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The Internet of Things has the potential to change the world, just as the
Internet did. Maybe even more so.
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Thank you for your attention
Richard [email protected]