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Bluetooth 4.0 delivers low-energy modes

Posted: 29 Dec 2009     Print Version  Bookmark and Share

Keywords:Bluetooth  low-energy mode  wireless 

The Bluetooth Special Interest Group has adopted the Bluetooth Core Specification Version 4.0, which includes low-energy modes.

The enhancement of the specification is expected to open up markets for devices requiring low-cost and low-power wireless connectivity, including healthcare, sports and fitness, security and home. "For example, the Continua Health Alliance has already selected Bluetooth low-energy technology as a transport for the next version of its guidelines," said Michael Foley, executive director of the Bluetooth SIG, in a statement.

"Nokia has been committed to this ultra low-power wireless technology since its Wibree technology development," said Markku Verkama, director of devices R&D at Nokia, in the same statement.

Bluetooth low*energy technology supports short data packets; an 8 octet minimum up to 27 octets maximum, that are transferred at 1Mbps. It uses the adaptive frequency hopping common to all versions of Bluetooth technology to minimise interference from other technologies in the 2.4GHz ISM band.

The latency is a few milliseconds and the range can exceed 100m. The standard calls for 24bit cyclic redundancy checking for robustness against interference and supports AES-128 encryption to provide strong encryption and authentication of data packets.

- Peter Clarke
EE Times Europe





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