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Bluetooth Low Energy (BLE) Technology

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Bluetooth Low Energy (BLE) Technology

Bluetooth is managed by the Bluetooth Special Interest Group (SIG), which has more than 30,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The IEEE standardized Bluetooth as IEEE 802.15.1, but no longer maintains the standard. The Bluetooth SIG oversees development of the specification.

Originally, Gaussian frequency-shift keying (GFSK) modulation was the only modulation scheme available. Since the introduction of Bluetooth 2.0+EDR, π/4-DQPSK (differential quadrature phase shift keying) and 8DPSK modulation may also be used between compatible devices. Devices functioning with GFSK are said to be operating in basic rate (BR) mode where an instantaneous bit rate of 1 Mbit/s is possible. The term Enhanced Data Rate (EDR) is used to describe π/4-DPSK and 8DPSK schemes, each giving 2 and 3 Mbit/s respectively. The combination of these (BR and EDR) modes in Bluetooth radio technology is classified as a "BR/EDR radio". A master BR/EDR Bluetooth device can communicate with a maximum of seven devices in a piconet (an ad-hoc computer network using Bluetooth technology), though not all devices reach this maximum. The devices can switch roles, by agreement, and the slave can become the master (for example, a headset initiating a connection to a phone necessarily begins as master—as an initiator of the connection—but may subsequently operate as the slave).



Typical Applications for Enterprise

  • Alternative MAC/PHY
  • Unicast Connectionless Data
  • Enhanced Power Control
  • Ultra-wideband

The diversity of Android devices appeals to consumer buyers, but is a source of anxiety for IT security experts. OpenSignal, a UK-based mobile company, recently published a survey of almost 700,000 devices and reported approximately 12,000 distinct Android devices using eight different versions of the Google operating system. For many IT organizations charting out their BYOD strategy, this translates into security risks that are tough to monitor and control.

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