利用蓝牙进行精确定位，并且可以实现高度定位，3维空间的定位限于；并非仅仅限于平面空间的定位。为移动终端做个性化服务提供基础。-Bluetooth for precise positioning, and can achieve a high degree of positioning, the positioning of three-dimensional space is limited not just limited to the positioning of the flat spa