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Bluetooth 4.0 packs low-energy modes

Posted: 24 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 ultralow-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 1Mbit/s. It uses the adaptive frequency hopping common to all versions of Bluetooth technology to minimize 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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