蓝牙5物联网技术

　　蓝牙5物联网技术

　　最新版本的蓝牙标准，蓝牙5，设置提供了广泛的增强功能，如更长的范围，更高的速度和扩展支持无连接服务。这是一个重大的升级，今天的蓝牙4.2技术，并将开辟新的物联网应用程序的智能环境。

　　此举允许企业和开发者带来一个可访问的，互操作的物联网。新标准规定的模式与现有设备的四倍的范围内，通过降低数据速率为500 kbps和250 kbps的，以允许更多的传感器被可靠地使用在家附近。这个范围不仅允许更多的控制器和传感器之间的距离，但也提供了一个更强大的终端设备的链接。它还允许两倍的数据速率为2 Mbps的，以允许更高质量的音频流从监视器或无线扬声器，以改善用户体验。

　　Market research estimates that Bluetooth will be in more than one-third of all installed IoT devices by 2020， driven by the ubiquitous implementation in smartphones to act as controllers. However， the requirement for a Bluetooth 5 chip in a smartphone as the controller or for streaming to a wireless headset is very different from the requirements for the Internet of Things. These IoT applications also need more sophisticated power management to maximize the battery life of the system， so an optimized DC-DC converter is an increasingly common element of the SoC.

　　The designs now being delivered to chip designers accommodate the requirements of SoC devices for IoT. For example， the RivieraWaves Bluetooth IP platform consists of a hardware baseband controller， a digital modem， and a detailed software protocol stack. The stack encompasses the Link Layer up to the GAP/GATT plus a set of Services and Profiles. The Riviera technology has already been used for previous generations of Bluetooth 4.2 devices from NXP such as the MKW31Z256.