System Architecture Directions for Networked Sensors

Jason Hill, Rober Szewczyk, Alec Woo, Seth hollar, David Culler & Kristofer Pister

Presented by Israel Martínez-Arredondo

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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

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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 (Cont’d)

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/