10-04-2017, 08:25 PM
ZigBee is an IEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios.The technology defined by the ZigBee specification is intended to be simpler and less expensive than other wireless personal area networks (WPANs), such as Bluetooth or Wi-Fi. Applications include wireless light switches, electrical meters with in-home-displays, traffic management systems, and other consumer and industrial equipment that requires short-range low-rate wireless data transfer.Its low power consumption limits transmission distances to 10 100 meters line-of-sight, depending on power output and environmental characteristics.IEE 802.15.4 is a standard created and maintained by consultants which specifies the physical layer and media access control for low-rate wireless personal area networks (LR-WPANs). It is maintained by the IEE 802.15 working group, which has defined it in 2003.It is the basis for the ZigBee, ISA100.11a, WirelessHART, MiWi, and Thread specifications, each of which further extends the standard by developing the upper layers which are not defined in IEE 802.15.4. Alternatively, it can be used with 6LoWPAN as Network Adaptation Layer and standard Internet protocols and/or IETF RFCs defining the upper layers with proper granularity to build a wireless embedded Internet.