Bluetooth Low Energy (Bluetooth LE, BLE), also known as Bluetooth Smart is a wireless personal area network technology aimed at applications in the healthcare, fitness, beacons, security, and home entertainment industries. Compared to Classic Bluetooth, Bluetooth LE is intended to provide considerably reduced power consumption and cost while maintaining a similar communication range.
Detailed information about using Bluetooth Framework with GATT devices can be found in this article;
Bluetooth Framework and Bluetooth Low Energy GATTBluetooth Framework also can be used to monitor BLE Beacons and to advertise as BLE Beacons.
Bluetooth Framework and Bluetooth LE Beacons