ZigBee Technology

[سمندون 19,437]

ZigBee is the only standards-based wireless technology designed to address the unique needs of low-cost, low-power wireless sensor and control networks in just about any market. Since ZigBee can be used almost anywhere, is easy to implement and needs little power to operate, the opportunity for growth into new markets, as well as innovation in existing markets, is limitless. Here are some facts about ZigBee:

[*=left]With hundreds of members around the globe, ZigBee uses the 2.4 GHz radio frequency to deliver a variety of reliable and easy-to-use standards anywhere in the world.
[*=left]Consumer, business, government and industrial users rely on a variety of smart and easy-to-use ZigBee standards to gain greater control of everyday activities.
[*=left]With reliable wireless performance and battery operation, ZigBee gives you the freedom and flexibility to do more.
[*=left]ZigBee offers a variety of innovative standards smartly designed to help you be green and save money.

[سمندون 19,437]

very useful ppt about ZigBee.

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[سمندون 19,437]

ZIGBEE is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power, wireless sensor networks.

The standard takes full advantage of the IEEE 802.15.4 physical radio specification and operates in unlicensed bands worldwide at the following frequencies: 2.400-2.484GHz, 902-928MHz and 868.0-868.6MHz.

The 802.15.4 specification was developed at the Institute of Electrical and Electronics Engineers (IEEE). The specification is a packet-based radio protocol that meets the needs of low-cost, battery-operated devices. The protocol allows devices to intercommunicate and be powered by batteries that last years instead of hours.

The ZigBee protocol carries all the benefits of the 802.15.4 protocol with added networking functionality.

The ZigBee protocol was engineered by the ZigBee Alliance, a non-profit consortium of leading semiconductor manufacturers, technology providers, OEMs and end-users worldwide.

The protocol was designed to provide OEMs and integrators with an easy-to-use wireless data solution characterised by low-power consumption, support for multiple network structures and secure connections.

The ZigBee protocol was designed to carry data through the hostile RF environments that routinely exist in commercial and industrial applications.

ZigBee protocol features:

* Low duty cycle - provides long battery life

* Low latency

* Support for multiple network topologies: static, dynamic, star and mesh

* Direct Sequence Spread Spectrum (DSSS)

* Up to 65,000 nodes on a network

* 128-bit AES encryption - provides secure connections between devices

* Collision avoidance

* Link quality indication

* Clear channel assessment

* Retries and acknowledgements

* Support for guaranteed time slots and packet freshness.

The ZigBee specification provides a security toolbox approach to ensuring reliable and secure networks. Access control lists, packet freshness timers and 128-bit encryption based on the NIST Certified Advanced Encryption Standard (AES) help protect transmitted data

 

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