SURVEY FOR WIRELESS SENSORS IN HEALTHCARE

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SURVEY FOR WIRELESS SENSORS IN HEALTHCARE

• Presented by
• Bharat Soundararajan

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OUTLINE

• INTRODUCTION
• PROPOSED PROBLEMS
• NETWORKS FOR HEALTHCARE
• MEDIC AND ITS ALGORITHM
• DIFFERENT TYPES OF TOPOLOGIES
• FUTURE

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INTRODUCTION

• Patients need continuous monitoring of their
  health conditions
• Various vital and health care
• data are collected using
• sensors and sent to the
• hospital

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Proposed Needs

• Low complexity
• Low cost
• Data reliability
• Low power consumption

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Different networks for healthcare
WLAN (802.11) Bluetooth-based WPAN (802.15.1) ZIGBEE (802.15.4)
Range 100m 10-100m 10m
Cost/complexity gt6 1 0.2
Power consumption Medium Low Ultralow
Size Larger smaller smallest
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MEDIC

• Acquire data from patients in real world
• It sends data to the centralized server and the
  centralized server forwards data to all the nodes
• It can be configured from the remote server
• Wearable sensors to patients for comfort ability

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MEDIC
MEDICAL PERSONAL
INTERNET
ZIGBEE or BLUE TOOTH
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What is ZigBee??

• ZigBee technology is a low data rate, low power
  consumption, low cost, wireless networking
  protocol targeted towards health care
• Zigbee Alliance introduced Zigbee standard
  protocol in 2003
• ZigBee is a technological standard, based on the
  IEEE 802.15.4 standard, which was created
  specifically for control and sensor networks. 

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The Zigbee Protocol Stack
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What is ZigBee??

• As can be seen in the figure, IEEE 802.15.4
  develops the Medium Access Control (MAC) Layer
  and Physical (PHY) Layer, which address such
  things as the frequency and data rate
  specifications.
• ZigBee develops the Network Layer and
  Application Layer, which includes the
  Applications Support Sub layer, the ZigBee Device
  Object, and the Security Services.

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BAYESIAN NETWORK ALGORITHM

• A set of variables independent of each other
• The probability of these variables influence the
  output
• Symptoms are used to determine whether a person
  has a disease
• This is trained by the previous data used for
  the treatment

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BAYESIAN NETWORK ALGORITHM
DISEASE
PULSE RATE
OXYGEN LEVEL
BODY TEMPERATURE
BLOOD PRESSURE
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PROBLEM WITH MULTIHOP
Cluster Tree
PAN coordinator
Full Function Device
Reduced Function Device
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Timezone CoordinatedSleep Scheduling Algorithm
(TICOSS)

• coordinated sleeping through the division
• of the network into time zones
• The time zones also provides coordinated
  sleeping, through the V-table scheduling
• The scheduling table allocates timeslots to nodes
  in order to assign periods of node activity and
  inactivity

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Topology Models
Mesh
Star
PAN coordinator
Full Function Device
Cluster Tree
Reduced Function Device
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TOPOLOGY MODELS

• It manages all the sensors inside the network
• It collects information from all the nodes and
  forwards it to the centralized server

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TOPOLOGY MODELS

• Fully functional device
• Any topology fits for fully functional
  device
• It can also act as a network coordinator,
  network router
• Reduced functional device
• It only fits perfectly for reduced functional
  device
• It cannot act as a network administrator

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Future???

• ZigBee is seen as a key technology for home
  automation and sensor networks, but its
  characteristics can be extremely valuable in some
  healthcare applications as well.
• On July 24-27, 2006 in the Free scale Technology
  Forum, Orlando, FL, the wireless developer
  Cambridge Consultants demonstrated how ZigBee's
  unique networking attributes can be exploited to
  implement networks for healthcare.

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References

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A.batalin, Lawrence K.Au,Jonathan D.Binney,
William J.kaiserPublished by Elsevier Science
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G. M.P O'Hare, P. Van Der StokPublished by ACM
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architecturefor assisted living and healthcare
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H.WuPublished by ACM Newyork Ny, USA in
20074. Wearable FPGA based Wireless Sensor
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Juha Rakkola1, Teemu Ramo, JukkaSalminen and
Jari SavolainenPublished by IEEE EBMS in
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XiaoPublished by Wireless Communications and
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