These protocols share a common feature: They all use some special nodes, called beacon nodes, which are assumed to know their own locations (e. G., Through GPS receivers or manual configuration).

• 这些标准协定共享一个普通的功能:他们全部使用一些特别的节点,叫做指标节点,这是假设来知道他们自己的位置(举例来说,经过全球定位测量卫星接收机或手册配置)。