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About Zigbee

 

The rapid growth of microprocessor technology, a steady price decline of wireless solutions and increase of their functionality enable energy companies and utilities to abandon wires and wired networks primarily used in data monitoring and control systems.

ZigBee is a new technology for establishing wireless data networks in the family of IEEE 802.15 Low Rate Wireless Personal Area Network (LR-WPAN - wireless personal area networks). The adapted wireless IP protocol is the basis of this technology which appeared in 2002.

Ukrainian Frequency Supervision Committee and the State Committee for Radio Frequencies in Russia made a decision on the allocation of the 2400-2483.5 MHz frequency band for natural and legal persons for use of short-range devices (ZigBee) with a capacity of up to 10 and 100 mW (respectively). The use of these bands can be effected without registration of individual solutions by SCRF or Ukrchastotnadzor and permits for their use.

ZigBee is a self-organizing and self-healing network, which greatly facilitates the installation of the system, as nodes are able to define and adjust data transmission routes. ZigBee is a highly reliable, cost-effective and energy-efficient protocol for network monitoring, data collection and management and is aimed primarily for use as a means of communication between autonomous devices and equipment management.

Due to the integrated software, devices that run on Zigbee are able to find each other and form a network, and in case of failure of any node or jamming situations are able to establish new data transmission routes. ZigBee technology can be used both for simple links "point to point" and "star" and for the formation of complex networks with "tree" and "mesh" topologies. The standard is ideal for setting up large networks of various devices in office buildings, as well as locally e.g. at storages, databases, markets, etc.

ZigBee devices transmission range depends on many parameters, but in the first place - from the receiver sensitivity and transmitter power. Open air distance between nodes in a ZigBee network is measured by hundreds of meters to kilometers, and in a room by dozens or hundreds of meters. ZigBee network coverage is much wider than the distance between nodes, as by relaying data network establishing is possible. ZigBee modules require configuration and a built-in protocol packet data to check transmitted data.

In 2001, the Institute of Electrical and Electronics Engineers IEEE has been invited to make a standard relating to the family of wireless personal area networks WPAN, which was designated as 802.15.4 frequency band. In 2002, the ZigBee Alliance was founded. The ZigBee Alliance is a fast growing non-profit consortium of companies, market leaders, semiconductor technology companies and consumers all over the world.

At present, the ZigBee Alliance has more than 400 members. Among them - the following promoter-companies whose representatives are members of the Board of Directors: Cellnet, Eaton Corporation, Ember Corporation, Freescale Semiconductor, Honeywell, Huawei Technologies, Itron, Mitsubishi Electric, Motorola, Philips, Samsung, Schneider Electric, Siemens, STMicroelectronics, Tendril Networks and Texas Instruments.

ZigBee strongly supports 7 out of 10 leading suppliers of semiconductor equipment: the Alliance members are Ember Corporation, Freescale Semiconductor, NEC, NXP, Renesas, Samsung, STMicroelectronics and Texas Instruments. Leading OEM-manufacturers - such as Eaton, Honeywell, Huawei, Johnson Controls, LG, Mitsubishi, Motorola, NEC, Philips, Samsung, Schneider Electric, Siemens, Vantage / Legrand, Yokogawa that develop new products based on ZigBee standard.