The platforms enabling wireless sensor networks l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

The Platforms enabling Wireless Sensor Networks PowerPoint PPT Presentation


  • 120 Views
  • Uploaded on
  • Presentation posted in: General

The Platforms enabling Wireless Sensor Networks. Hill, Horton, Kling, Krishnamurthy CACM, June 2004. Goals. Explore the different sensor network platforms (4) Since these devices often work together in the real world, also explore their architectural similarities and core differences

Download Presentation

The Platforms enabling Wireless Sensor Networks

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


The platforms enabling wireless sensor networks l.jpg

The Platforms enabling Wireless Sensor Networks

Hill, Horton, Kling, Krishnamurthy

CACM, June 2004


Goals l.jpg

Goals

  • Explore the different sensor network platforms (4)

  • Since these devices often work together in the real world, also explore their architectural similarities and core differences

  • Recent progress in hardware and possible future capabilities


Platform classes l.jpg

Platform Classes

  • Not all nodes are the same!

  • Tiered architecture.

  • Consider an example: Advanced Security system. Includes:

  • Simple battery powered sensors for motion, window breakage etc.

  • Advanced sensors like cameras, acoustic, chemical sensors


Platform classes4 l.jpg

Platform classes

  • Simple sensors have a specific function and require long term battery operation

  • Also – minimal processing and bandwidth requirements

  • Complex Acoustic, Video etc require more computation and communication resources

  • Often also require to be ‘plugged’ in


Platform classes5 l.jpg

Platform classes

  • A third sensor class is “Mini-Motes”

  • Low cost security tags for asset management, personnel tracking etc

  • Highly integrated and very inexpensive

  • ‘Smart-dust’

  • Finally – One or more endpoints containing database or aggregation capabilities – Gateway nodes


Hierarchical deployment of platforms l.jpg

Hierarchical deployment of platforms


Operating characteristics of the node classes l.jpg

Operating characteristics of the node classes


Examples l.jpg

Examples

  • Asset tags – Spec node (Berkley)

  • General class sensing – Berkley motes (Mica2)

  • High bandwidth sensing- iMote (Intel)

  • Gateway – Stargate platform (Intel, Crossbow)


Architectural differences l.jpg

Architectural Differences

  • A lot of similarity between the four classes despite significant capability differences

  • This is because of the requirement that Network support is seamless and self configuring

  • Core differences come from optimizations in power for certain classes of


Architectural differences10 l.jpg

Architectural Differences

  • Major difference between sensors and more traditional computers/PDA’s is the emphasis on power management

  • To manage power efficiently, each subsystem is powered individually

  • TinyOS controls activity and power state of various subsytems.


Architectural differences11 l.jpg

Architectural Differences

  • Sensor platforms give applications direct, fine grained control over the hardware

  • Traditional stacks inefficient

  • 3 pronged approach:

    - General purpose component framework that eliminates layering

    - Hardware func exposed to applications/middleware

    - Virtualization/ Abstraction to write sensor applications


Architectural differences12 l.jpg

Architectural Differences


Platform roadmap l.jpg

Platform Roadmap

  • Hardware Progression – Moore’s law insures increase in performance for a given power budget. Mica2 is 8 times more memory, bandwidth than its predecessor Rene for same cost

  • New CMOS radios for low data rates, and using low power


Platform roadmap14 l.jpg

Platform Roadmap

  • Software and Interface standards

  • 802.15.4 determines what radio hardware to use

  • Zigbee determines the content of messages


Conclusion l.jpg

Conclusion

  • Surveyed a variety of platforms.

  • Realization that real networks employ a variety of these.


  • Login