System Architecture Directions for Networked Sensors

1
System Architecture Directions for Networked
Sensors

• Jason Hill, Rober Szewczyk, Alec Woo, Seth
  hollar, David Culler Kristofer Pister
• Presented by Israel Martínez-Arredondo

2
Outline

• Networked Sensor Characteristics
• Hardware Organization
• Tiny Microthreading Operating System (TinyOS)
• TinyOS Design
• Components
• Evaluation

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Networked Sensor Characteristics

• Small Physical size and low power consumption
• Concurrency-intensive Operation
• Limited Physical Parallelism and Controller
  Hierarchy
• Diversity in Desing and Usage
• Robust Operation

4
Hardware Organization

• Three sleep modes (idle, power down power save)
• Three LEDs to represent outputs
• Photo-sensor
• Radio
• Temperature Sensor
• Serial Port

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Tiny Microthreading OS (TinyOS)

• Requirements (small physical size, modest active
  power load tiny inactive load)
• Two-level scheduling structure
• High levels of concurrency

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Tiny OS Design

• Tiny Scheduler
• Components
• Frame
• Tasks
• Event Handlers
• Command Handlers

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Component Types

• Hardware Abstractions
• Synthetic Hardware
• High Level Software Components ?

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High Level Software Components
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Putting it All Together
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Evaluation

• Small Physical Size
• Concurrency-Intensive Operations
• Efficient Modularity
• Limited Physical Parallelism and Controller
  Hierarchy
• Diversity in Usage and Robust Operation

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Small Physical Size
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Concurrency-Intensive Operations
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Efficient Modularity
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Evaluation (Contd)

• Limited Physical Parallelism and Controller
  Hierarchy
• Diversity in Usage and Robust Operation

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Discussion

• What are potential avenues for further work and
  improvements?
• RFIDs
• Characteristics
• Usage
• Downside

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References

• Loren P. Clare, Esther H. Jennings, Jay L. Gao,
  Performance Evaluation Modeling of Networked
  Sensors, Ca, USA
• Adrian Perrig, Robert Szewczk, Victor Wen, David
  Culler, Security Protocols for Sensor Networks
  University of California
• RFID
• http//www.aimglobal.org/technologies/rfid/
• http//news.com.com/2010-1069-980325.html
• http//www.rfidsociety.org/