短距离低功率无线通信接入系统

Short Distance Low Power Wireless Communication Access System

短距离低功率无线通信接入技术主要集中在物理层和媒体访问控制(MAC)层,包括蓝牙、超宽带(UWB)和Wi-Fi等。蓝牙是链接近距离设备的电缆数据传送的辅助技术;UWB作为窄脉冲无线电技术链接众多电子设备,提供宽带无线接入的灵活性和移动性;Wi-Fi给快速接入设备和WLAN内移动设备提供无线链接,用于较长距离链接,支持一定功率的移动终端接入。短距离低功率无线通信接入系统的标准化进程非常快,辅助标准多,但目前仍以蓝牙和Wi-Fi为主。

Short distance low power wireless communication access technologies mainly concentrate in the physical layer and media access control （MAC） layer, including Bluetooth, Ultra-Wideband （UWB）, Wi-Fi, etc. Bluetooth is a supplementary technology for short distance data transmission between devices; UWB is a type of narrow band pulse wireless technology for the connection with a variety of devices, providing fair flexibility and mobility; Wi-Fi is used to provide wireless connection for both instant access equipment and WLAN mobile devices, applied in long distance connection and to support the access for a certain power mobile terminals. Although the standardization progress of short distance low power wireless communication access systems is very fast and there are many supplementary standards, the most dominant ones are still Bluetooth and Wi-Fi.