Z-Wave

Z -Wave is a wireless communication standard, the design and the Z -Wave Alliance is designed for home automation from Sigma. The hardware-based protocol layers (MAC and PHY) are defined since 2012 by the ITU- T G.9959 as standard.

Z -Wave Alliance

The Z -Wave Alliance is an association of over 160 independent manufacturers that produce or still want to develop products for wireless home automation. Main members (so-called " principal members " ) are Danfoss, Fakro, 2gig, Ingersoll-Rand, Jasco Products Company, Evolve and Sigma Designs.

With more than 600 certified products Z- Wave is the largest ecosystem of interoperable radio-based products.

Specifications

  • Transfer Rate: 9600 bit / s or 40 kbit / s
  • Modulation: 2-FSK
  • Range: Up to 200 meters in open air, in buildings, depending on the construction materials used, much less; typically around 30 m
  • Frequency Band: Z -Wave uses the ISM band in the range around 900 MHz, in the U.S. there are 908.42 MHz, 868.42 MHz in Europe.

Topology and routing

Z-Wave used as the network topology, a mesh network, that is, each network node is connected to one or more other network nodes. This has the advantage that a message between two network nodes can be transmitted even if they can not communicate directly with each other, for example because they are too far apart. In this case, the message is transmitted via one or more " intermediate nodes "; This process is called routing. A Z- Wave network can consist of up to 232 devices. Moreover, it is also possible to connect a plurality of Z-Wave networks via bridges with one another.

Areas of application

Main application area is the home automation, so the wireless control of heating, ventilation, lighting and air conditioning. Due to the low bandwidth of the Z-Wave is not suitable for transmission of audio or video data. Z -Wave is in direct competition with ZigBee. For both protocols, there are a number OSGi -based framework solutions that involve going beyond the pure log home automation functions, such as a device abstraction layer.

Ingersoll Rand ISM-Band X10 (industry standard) Enocean
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