SURVEY FOR WIRELESS SENSORS
IN HEALTHCAREPresented by
Bharat Soundararajan
OUTLINE• INTRODUCTION• PROPOSED PROBLEMS• NETWORKS FOR HEALTHCARE• MEDIC AND ITS ALGORITHM• DIFFERENT TYPES OF TOPOLOGIES• FUTURE
INTRODUCTION• Patients need continuous monitoring of their
health conditions
• Various vital and health care data are collected using sensors and sent to the hospital
Proposed Needs• Low complexity
• Low cost
• Data reliability
• Low power consumption
Different networks for healthcareWLAN (802.11)
Bluetooth-based WPAN (802.15.1)
ZIGBEE(802.15.4)
Range 100m ~10-100m ~10m
Cost/complexity >6 1 0.2
Power consumption
Medium Low Ultralow
Size Larger smaller smallest
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
MEDIC
INTERNET
MEDICAL
PERSONAL
ZIGBEE or BLUE TOOTH
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.
The Zigbee Protocol Stack
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.
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
BAYESIAN NETWORK ALGORITHM
DISEASE
PULSE RATE OXYGEN LEVEL BODY TEMPERATURE BLOOD PRESSURE
PROBLEM WITH MULTIHOP
PAN coordinatorFull Function Device
Cluster Tree
Reduced Function Device
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
Topology Models
15
PAN coordinatorFull Function DeviceReduced Function Device
Star
Mesh
Cluster Tree
TOPOLOGY MODELS
• It manages all the sensors inside the network• It collects information from all the nodes and
forwards it to the centralized server
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
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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