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short range wireless (SRW)

Short Range Wireless (SRW) is a wireless technology for the short range. Such a short range is the range between a few centimeters and about 10 m. Since most Short Range Wireless Networks (SRWN) operate in the microwave range, they are limited in their range by low transmit power and free space attenuation.

Most SRW networks operate in the license-free ISM band at 2.4 GHz. Only ultra-wideband uses the frequency range between 3.1 GHz to 10.6 GHz, and WirelessHD operates in the 60 GHz band. In both cases, free-space attenuation limits longer distances.

Application-wise, short range wireless technology has the advantage of being wireless, so the networks are not tied to a cabling structure. Since they are often Self Organized Networks( SON), which are self-organizing, nodes and endpoints can be easily added or removed. Therefore, SRW networks are easy to manage, offering high flexibility with remote monitoring. Applications range from sensor networks to networks for toys, connectingconsumer electronics devices, telemedicine, wireless fieldbuses, nearfieldcommunication( NFC) and RFID.

Among the better-known short range wireless technologies are Bluetooth, ZigBee, ANT+, TransferJet, WirelessHD, WirelessUSB and Wireless HDMI. This selection also represents the completely different application areas of SRW technology.

Informations:
Englisch: short range wireless - SRW
Updated at: 09.12.2014
#Words: 189
Links: microwave (MW), power (P), space (SP), attenuation (ATT), integrated signal management (ISM)
Translations: DE
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