15-06-2012, 05:57 PM
Experimental e-Health Applications in Wireless Sensor Networks
[attachment=24649]
. Introduction
With the increasing growth of Internet usage among people, E-services for the healthcare which is commonly known as e-Health, have recently attracted
significant attention within both the research society
and industry. The reason for this is the common beliefthat e-Health can give extensive benefits for the
patients, healthcare professionals and healthcare facilities. Because of the fast development of broadband network infrastructure, the telecare medical applications to provide long-term monitoring and healthcare by transmitting personal physical
information via the Internet have become highly
feasible [1].
Recently WSN has started to enter the e-Health
business and there are several ongoing projects. In [2], a project called CodeBlue proposes a new architecture focusing on tracking and monitoring of patients and first responders. They use MoteTrack location system which employs many beacon nodes, which broadcast beacon messages at various transmission powers. In [3], a prototype system is built where sensor tags are placed on everyday objects such as a coffee cup or a toothbrush and the system monitors the movement of the tagged objects through tag readers. Another system is ALARM-NET [4],
System Description
The complete system design includes three different parts: hardware design, network architecture and software design. In the following subchapters we will describe the different parts to give an overview of the working system
Hardware Design
The node works as a small computer with limited
CPU, memory and battery, and it needs different driver programs when different sensors or other hardware attach to it. The node we used in our system is MicaZ of Crossbow company, which is a 2.4 GHz, IEEE/ZigBee 802.15.4 board used for sensor networks, which owns a microcontroller ATmega128L and a RF chip CC2420. Multi-sensor board MTS310 and data board MDA300 are used in our system. Here introduces some sensors we used. Pressure sensor connecting to air bed with vacuum pipe is used to test if there are person on the bed or chair. Fire sensor puts in kitchen. Pulse sensor is used
to measure heartbeat rate and bind on the wrist of the
person acting as the mobile node (beacon node).Emergency button on person also attaches to
mobile node for the emergency situation.
Network architecture design
After hardware design, network architecture is
given here to show a big picture of the system.
As figure 2 shows, the network in E-Healthcare is
composed by wireless and wired part. Wireless part in person home collects environment and person
parameters, while wired part processes and transfers
data to remote computer or PDA. Basestation with
computer is the device that can either take as one node in wireless network or a node in wired network. Here we take it with gateway (a computer on internet) together as one part of wireless network.
In figure 1, wireless is expressed by dash lines, and
wired part solid lines. In the wireless part, there is one mobile node and many fix location nodes. All data of them are transmitting to a basestation by wireless. The gateway receives the data from basestation and saves them in database.
[attachment=24649]
. Introduction
With the increasing growth of Internet usage among people, E-services for the healthcare which is commonly known as e-Health, have recently attracted
significant attention within both the research society
and industry. The reason for this is the common beliefthat e-Health can give extensive benefits for the
patients, healthcare professionals and healthcare facilities. Because of the fast development of broadband network infrastructure, the telecare medical applications to provide long-term monitoring and healthcare by transmitting personal physical
information via the Internet have become highly
feasible [1].
Recently WSN has started to enter the e-Health
business and there are several ongoing projects. In [2], a project called CodeBlue proposes a new architecture focusing on tracking and monitoring of patients and first responders. They use MoteTrack location system which employs many beacon nodes, which broadcast beacon messages at various transmission powers. In [3], a prototype system is built where sensor tags are placed on everyday objects such as a coffee cup or a toothbrush and the system monitors the movement of the tagged objects through tag readers. Another system is ALARM-NET [4],
System Description
The complete system design includes three different parts: hardware design, network architecture and software design. In the following subchapters we will describe the different parts to give an overview of the working system
Hardware Design
The node works as a small computer with limited
CPU, memory and battery, and it needs different driver programs when different sensors or other hardware attach to it. The node we used in our system is MicaZ of Crossbow company, which is a 2.4 GHz, IEEE/ZigBee 802.15.4 board used for sensor networks, which owns a microcontroller ATmega128L and a RF chip CC2420. Multi-sensor board MTS310 and data board MDA300 are used in our system. Here introduces some sensors we used. Pressure sensor connecting to air bed with vacuum pipe is used to test if there are person on the bed or chair. Fire sensor puts in kitchen. Pulse sensor is used
to measure heartbeat rate and bind on the wrist of the
person acting as the mobile node (beacon node).Emergency button on person also attaches to
mobile node for the emergency situation.
Network architecture design
After hardware design, network architecture is
given here to show a big picture of the system.
As figure 2 shows, the network in E-Healthcare is
composed by wireless and wired part. Wireless part in person home collects environment and person
parameters, while wired part processes and transfers
data to remote computer or PDA. Basestation with
computer is the device that can either take as one node in wireless network or a node in wired network. Here we take it with gateway (a computer on internet) together as one part of wireless network.
In figure 1, wireless is expressed by dash lines, and
wired part solid lines. In the wireless part, there is one mobile node and many fix location nodes. All data of them are transmitting to a basestation by wireless. The gateway receives the data from basestation and saves them in database.