Networked Embedded Systems and Sensor Networks: Where is the keyboard - PowerPoint PPT Presentation

1 / 17
About This Presentation
Title:

Networked Embedded Systems and Sensor Networks: Where is the keyboard

Description:

Networked Embedded Systems and Sensor Networks: Where is the ... COTS Dust - RF Mote. Crossbow - Mote. CCR Mote. Sensoria sGate 'Sensor Network' as a System ... – PowerPoint PPT presentation

Number of Views:945
Avg rating:3.0/5.0
Slides: 18
Provided by: seapahnm
Category:

less

Transcript and Presenter's Notes

Title: Networked Embedded Systems and Sensor Networks: Where is the keyboard


1
Networked Embedded Systems and Sensor
NetworksWhere is the keyboard?
  • Seapahn Megerian
  • megerian_at_ece.wisc.edu
  • http//www.ece.wisc.edu/megerian/pub/nes.ppt
  • Electrical and Computer Engineering Department
  • University of Wisconsin Madison

2
Outline
  • Introduce networked embedded systems
  • Motivate potential applications
  • What is new?
  • Examples of active research projects
  • Autonomous calibration
  • Sensor coverage and deployment
  • Environment control
  • Future directions and Summary

3
Networked Embedded Sensor Networks
  • Environment monitoring
  • Weather, contaminants, earthquake, fire, habitats
  • Surveillance, security, disaster relief
  • Traffic safety
  • Smart spaces
  • Home and office automation
  • Ubiquitous and proactive computing

4
Platform Examples
  • COTS Dust - RF Mote

Crossbow - Mote
CCR Mote
Sensoria sGate
5
Sensor Network as a System
  • Deployment Where do we put the sensors?
  • Engineered
  • Ad Hoc
  • Operation How will the system function?
  • Initialization, discovery
  • Self assembly and communication
  • Management
  • Sensing and Computing
  • Must deal with uncertainties and errors
    autonomously
  • Security and Privacy

6
Differences from Wireless Networking
  • Wireless data networks (e.g. 802.11b)
  • Goal is to transmit data from one end point to
    the next
  • Networked Embedded Sensor Systems
  • Tasks vary
  • Point to point data transmission often not the
    goal
  • Data processed in the network
  • Each node may potentially have great processing
    power
  • Self organizing
  • Some similarities to ad-hoc networking
  • Autonomous and at times inaccessible nodes.

7
Networked Sensor Systems
  • Primary Goal is Sensing

8
The Errors Will Be There
  • Measurement errors
  • Calibration
  • Noise
  • Parameter errors
  • Locations
  • Orientations
  • Modeling Errors
  • Solution Errors

9
Calibration How to Deal with Space and Time?
d2
d1
S1
S2
Source
M0
M1
M2
  • We want to know value of M0
  • We know S1, S2, d1, and d2
  • M1 and M2 are functions of S1 and S2
  • Example Mi Si ?i
  • Need relation between M1 and M2 to solve for
  • M0, ?1, and ?2

10
Sensor Deployment and Coverage
  • How well do the sensors observe the world?

11
0/1 Coverage An Example
12
0/1 Min Cover A Random Instance
Random Instance 200 Sensors
Min Cover 16 Sensors
13
Sensor Exposure
Minimal exposure path for 50 randomly deployed
sensors
14
Light Sensing Demonstration
15
Summary Sensor Network Challenges
  • Power constraints absolutely crucial
  • Limit communication as processing is cheap
  • Self organization
  • Autonomous operation
  • Design and deployment
  • Enabling technologies
  • Software radios
  • Smart antennas
  • Miniaturization
  • MEMs

16
Other Current Research Projects
  • Sensor calibration in distributed settings
  • Error analysis
  • Impacts of parameter errors on applications
  • Example Location errors and coverage
  • Localized algorithms
  • Efficient design space exploration
  • Embedded systems
  • Architectures
  • Algorithms

17
Networked Embedded Systems and Sensor
NetworksWhere is the keyboard?
  • Seapahn Megerian
  • megerian_at_ece.wisc.edu
  • http//www.ece.wisc.edu/megerian/pub/nes.ppt
  • Electrical and Computer Engineering Department
  • University of Wisconsin Madison
Write a Comment
User Comments (0)
About PowerShow.com