Zigbee technolgy
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Transcript of Zigbee technolgy
Zigbee Technolgy
By Anirudh2210413832
What is Zigbee?• ZigBee is a standard that defines a set of communication protocols for low data-rate,short-range wireless networking
• It has adopted IEEE 802.15.4 standards
• It operates in 3 frequencies (2.4 Ghz , 915Mhz , 868Mhz)
Zigbee characteristics
•Low cost•Low power consumption•Low data rate•Short range•Reliability•High security•Easy implementation & protocols
•Full – function devices•Reduced - funtion
devices
Types of devices
Device roles
• Coordinator• Router• End device
Networking topologies
Networking layers
Communication•It uses single frequency at a time•It implements simple channel access
mechanism CSMA-CA
CSMA-CA
Checks for channel clear and transmits data.
Channel clearEnergy detection method
Carrier sense method
Data transfer•DT to coordinator from device•DT to device from coordinator•DT between two peers
General characteristics•Data verification(16-bit Frame Check Sequence (FCS))
•Addressing •Association and dissociation•Binding•Self healing and self forming
PHY Packet format
MAC layerGenerating beacons (if the device is a coordinator)● Synchronizing the device to the beacons (in a beacon-enabled network)● Employing the CSMA-CA for channel access● Managing GTS channel access● Providing a reliable link between two peer MAC entities (two different devices)● Providing PAN association and disassociation services● Providing support for security; the MAC layer is responsible for its own securityprocessing, but the upper layers determine which security level to use
Mac packet formats
Nwk layer• Configuring a new device. For example, a new device can be configured to
begin• its operation as a ZigBee coordinator or try to join an existing network.• Starting a new network.
Modes of operation•Ideal mode•Transmit mode•Receive mode•Command mode•Sleep mode
•Thank you