Real Time Location System using ZigBeE Sensors

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Real Time Location System using ZigBeE Sensors

• CSE646
• Mary Nitya Tharakan
• Person 35085860

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Real time Location system RTLS

• Unlike traditional sensors like UV and infrared
  sensors, ZigBee sensors are in use.
• RTLS supports features such as exit alerts ,
  patient tracking , patient safety and asset
  tracking which are important in hospitals.
• It has been introduced by a San Diego based
  company by the name Awarepoint.

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What is different about it?

• RTLS systems uses Zig Bee which offers the
  following features such as
• Extra Encryption Services (application and
  network keys implement extra 128b AES
  encryption).
• Association and authentication (only valid nodes
  can join the network).
• Routing protocol AODV, a reactive ad hoc network
  has been implemented to perform the data routing
  and forwarding process to any node in the
  network.

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Zigbee network

• Three types of nodes exist in a ZigBee Network
• Coordinator - the "master" device, it governs
  the network.
• Routers -routes the information which sent by
  the end devices.
• End device (the motes - the sensor nodes)
• - the ones which take the information from the
  environment.
• ZigBee creates star topology.

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802.15 Vs Zigbee

• 802.15.4 is primarily used to achieve point to
  point and energy efficient communications.
• ZigBee defines extra services (start topology
  routing, encryption, application services) over
  802.15.4.
• ZigBee creates semi-centralized networks where
  just the end devices can sleep.

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Advantages

• Unlike infrared sensors it offers persistent room
  level location tracking.
• Avoids interference with medical equipment.
• Maintains separation from Wi-Fi network.

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References

• http//www.hoise.com/vmw/09/articles/vmw/LV-VM-07-
  09-8.html
• http//www.rfidsb.com/rfid-street-your-weekly-insi
  de-scoop-rfid/524-gps-sensors-mesh-networks-enhanc
  e-wireless-id-apps.html
• http//www.awarepoint.com/
• http//www.digi.com/technology/rf-articles/wireles
  s-zigbee.jsp
• Most slides from http//www.sensor-networks.org/in
  dex.php?page0823123150