Introduction to zigbee
- 1. By – Amit Dixit Nayan Agarwal Anirudh Katkar
- 2. ZigBee is a new wireless technology Technological Standard Created for Control and Sensor Networks Based on the IEEE 802.15.4 Standard Created by the ZigBee Alliance Philips,Motorola,Intel,HP are all members of the allience.
- 3. Its low power consumption limits transmission distances to 10– 100 meters line-of-sight, depending on power output and environmental characteristics. ZigBee is typically used in low data rate applications that require long battery life and secure networking (ZigBee networks are secured by 128 bit symmetric encryption keys.) ZigBee has a defined rate of 250 kbit/s, best suited for intermittent data transmissions from a sensor or input device.
- 4. ZigBee is a low-cost, low-power, wireless mesh network standard targeted at the wide development of long battery life devices in wireless control and monitoring applications. Zigbee devices have low latency, which further reduces average current. ZigBee chips are typically integrated with radios and with microcontrollers that have between 60- 256 KB of flash memory.
- 5. Standard in a fragmented market Many proprietary solutions, interoperability issues Low Power consumption Users expect battery to last months to years! Low Cost High density of nodes per network Simple protocol, global implementation
- 6. Data rates of 250 kbps and 20 kbps Star topology, peer to peer possible 255 devices per network CSMA-CA channel access Optional Guaranteed Time Slot Fully handshaked protocol for transfer reliability Low power (battery life multi-month to years) Dual PHY (2.4GHz and 868/915 MHz) Range: 10m nominal (1-100m based on settings) Location Aware: Yes, but optional
- 7. There are three different ZigBee device types that operate on the layers in any self-organizing application network 1. Zigbee Coordinator node 2. Full Function Device (FFD) 3. Reduced Function Device(RFD)
- 8. It is the root of network tree and a bridge to other network Able to store information about the network Only one ZCN for a network It act as a repositary for other security keys
- 9. An intermediatory router transmitting data from other devices Needs lesser memory than Zigbee coordinator node Lesser manufacturing cost Can operate on all topologies Also act as a coordinator
- 10. Device capable of talking in the network It cannot relay data from other devices Less memory Cheaper than FFD It talks only to the n/w coordinator
- 14. Low power consumption with battery life ranging from months to years High density of nodes per network Low cost Simple implementation Low data rate Small packet devices
- 15. Home Entertainment and Control Wireless sensor networks Industrial control Embedded sensing Medical data collection Smoke and intruder warning Building automation
- 16. The ZigBee Alliance targets applications Across consumer, commercial, industrial and government markets worldwide Home networking Industrial control and management
- 17. All Zigbee compliant appliances compatibly operate on the same network Setting up Zigbee wireless home management system is relatively inexpensive Ability to manage home appliance network remotely Eliminates dependence on Infrared device No central control point - dispersal of workload
- 18. Replacement with Zigbee compliant appliances can be costly No more secure than a typical 802.11 wireless network Zigbee compliance certification for appliance manufacturers mandates lithium battery use Can be confusing at first for the homeowner Zigbee compliant manufacturers slow to make an appearance on the market
- 19. In future all devices and their controls will be based on this standard. Since Wireless personal Area Networking applies not only to household devices, but also to individualised office automation applications, ZigBee is here to stay. It is more than likely the basis of future home-networking solutions………