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The Personal Sensor Network: a User-Centric Monitoring Solution. BodyNets 07, Firenze 13 Giugno 2007. S.K.S. Gupta , IMPACT Lab, Arizona State University. G. Giorgetti, G. Manes , Dip. Elettronica e Telecom., Universit à degli Studi di Firenze

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the personal sensor network a user centric monitoring solution
The Personal Sensor Network: a User-Centric Monitoring Solution

BodyNets 07, Firenze 13 Giugno 2007

S.K.S. Gupta, IMPACT Lab, Arizona State University

G. Giorgetti, G. Manes, Dip. Elettronica e Telecom., Università degli Studi di Firenze

J.H. Lewis, Sal T. Mastroianni, Embedded Systems Research, Motorola Labs

out of the box wsns

Iris

TOS v.1.x-2.0

MicaZ

Imote2

Mica2Dot

Ad-hoc

Networking

TelosB

Mica2

“Out of the Box” WSNs

Enabling Technologies:

+

Commercially available sensor boards

Open source OS with support for ad hoc networking

more sensor network applications
More Sensor Network Applications…

Is a computer always necessary (or desirable) ?

Emergency Response

Health

Care

Recreational

Applications

the power in your hands
The Power in Your Hands
  • Computation
  • Communication(GPRS, WiFi, Bluetooth,…)
  • User Interface(Hi-Res display, Multimedia,…)
  • Development Tools(Java, .NET,…)
  • … and much more
phone to wsn interface
Phone to WSN Interface
  • Design Principles:
  • To minimize the changes to the existing WSN architecture (required to maintain backward compatibility with previous apps.)
  • To leverage COTS hardware and existing software solutions (to minimize the development time).
  • Issues to address:
  • Phone to sensors interface
  • Data handling on the cell phone

Monitoring and Control Software

phone to sensor interface
Phone to sensor interface:
  • We evaluated three options:
    • Direct Connection
    • WAN Connection
    • Bluetooth
option 1 direct connection
Option 1: Direct Connection

Serial Port

  • Pros:
    • Low Power
    • Reliable
  • Cons:
    • Portability
    • Interface
    • Cumbersome

The phone is physically connected to one of the sensor nodes

option 2 wan connection

Internet

WEB

Option 2: WAN Connection

GPRS

WiFi

TCP/IP

Server

  • Pros:
    • Standard progr.
    • tools (i.e. sockets)
    • Apps (Browser)
  • Cons:
    • No local access
    • Cost

The phone uses a WAN connection to access the WSN information

option 3 bluetooth
Option 3: Bluetooth
  • Pros:
    • Universal Connect.
    • Ubiquitous
  • Cons:
    • Custom interface
    • needed on the GW

The phone uses a Bluetooth connection to access the WSN information

standard data flow

Transparent Data Forwarding

Data

Data

Radio

MCU

UART

Cmd

Cmd

Standard Data Flow

TinyOS Pkt

Data

TinyOS Pkt

Data

0101101100110

RS232 / USB

Processing

&Data Storage

WSN Gateway

TinyOS Pkt

Cmd

TinyOS

Cmd

0101101100110

bluetooth gateway

Bluetooth

BlueRadios BR-C40A

With

Serial Port Profile

BT

RFCOMM

TelosB with the Bluetooth Module

Cmd

Data

Bluetooth Gateway

RS232 / USB

Data

Data

Radio

MCU

UART

Cmd

Cmd

software on the phone
Software on the Phone

Bluetooth

RFCOMM

  • Phone Software:
  • Establishes the connection to the BT gateway
  • Handles the TinyOS packet structure
  • Coverts the raw sensor data in engineering units
  • Provides the users with a GUI
  • Dispatch control commands to the WSN
software on the phone cnt d
Software on the Phone (cnt’d)

Moto Q version

IDEN i870 Version

  • MIDlet written using J2ME:
  • MIDP 2.0
  • CLDC 1.1
  • Bluetooth API (JSR-82)

The software on the phone is based on a “stripped down” version of the JAVA classes distributed with TinyOS for packet handling

Java Software

wsn on the q phone
WSN on the Q Phone
  • Motorola Q Phone:
  • Windows Mobile 5.0 Smartphone edition
  • Java support:
  • IBM WebSphere Everyplace Micro Environment 6.1 (MIDP2.0, free download)