Intro to Computer Science CH05-02 | Personal Area Networks: Bluetooth, UWB, and ZigBee (English)

Introduction to Computer Science, Chapter 5: Wireless Networks and Mobile Communications | Micro-lecture Unit 02 (of 6) This unit focuses on three representative technologies of wireless personal area networks (WPAN, IEEE 802.15). It presents the evolution of Bluetooth in three stages: data-rate improvement, low-energy IoT (Bluetooth Low Energy, BLE), and precise ranging. It then explains how ultra-wideband (UWB) achieves centimeter-level positioning through nanosecond pulses and time-of-flight ranging, and outlines the low power consumption, low data rate, large node capacity, and self-healing mesh networking of ZigBee, before comparing the application scenarios of the three technologies. Key topics: the evolution of Bluetooth; UWB precise positioning; ZigBee for the Internet of Things