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Z-Wave is a wireless communications specification designed to allow devices in the home (lighting, access controls, entertainment systems and household appliances, for example) to communicate with one another for the purposes of home automation. == Overview == Z-Wave technology minimizes power consumption so that it is suitable for battery-operated devices. Z-Wave is designed to provide reliable, low-latency transmission of small data packets at data rates up to 100kbit/s,〔(【引用サイトリンク】title=About Z-Wave Technology )〕 unlike Wi-Fi and other IEEE 802.11-based wireless LAN systems that are designed primarily for high data rates. Z-Wave operates in the sub-gigahertz frequency range, around This band competes with some cordless telephones and other consumer electronics devices, but avoids interference with Wi-Fi, Bluetooth and other systems that operate on the crowded band. Z-Wave is designed to be easily embedded in consumer electronics products, including battery operated devices such as remote controls, smoke alarms and security sensors. Z-Wave was developed by a Danish startup called Zen-Sys that was acquired by Sigma Designs in 2008. , Z-Wave is supported by over 325 manufacturers worldwide and appears in a broad range of consumer and commercial products in the US, Europe and Asia. The lower layers, MAC and PHY, are described by ITU-T G.9959〔(【引用サイトリンク】title=Recommendation G.9959 )〕〔(【引用サイトリンク】title=ITU-T G.9959 standard is close to Z-Wave tech )〕 and fully backwards compatible. The Z-Wave transceiver chips are supplied by Sigma Designs and Mitsumi. Some Z-Wave product vendors have open source options for the hobbyist communities. They require users to start with a complete Z-Wave transceiver from a Z-Wave OEM such as an Intermatic USB stick. The xPL project also provides open source support for Z-Wave products,〔(【引用サイトリンク】title=Z-Wave World )〕 but requires Microsoft Windows. Since 2010, there has been a project called Open-zwave that seeks to offer development support without expensive software development kits. Another project has created a Z-Wave daughter board for the Raspberry Pi, a credit-card-sized single-board computer.〔http://razberry.z-wave.me/〕 Z-Wave is a protocol oriented to the residential control and automation market. Conceptually, Z-Wave is intended to provide a simple yet reliable method to wirelessly control lights and appliances in a house. To meet these design parameters, the Zensys or Sigma Designs Z-Wave package includes a chip with a low data rate that offers reliable data delivery along with simplicity and flexibility. Z-Wave works in the industrial, scientific, and medical (ISM) band on a single frequency using frequency-shift keying (FSK) radio. The throughput is up to using older series chips) and suitable for control and sensor applications. Each Z-Wave network may include up to 232 nodes, and consists of two sets of nodes: controllers and slave devices. Nodes may be configured to retransmit the message in order to guarantee connectivity in the multipath environment of a residential house. Average communication range between two nodes is 100m, and with message ability to hop up to four times between nodes, this gives enough coverage for most residential houses. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Z-Wave」の詳細全文を読む スポンサード リンク
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