“北斗”系统作为全球四大导航卫星系统之一,其短报文功能是与其他几个导航系统的最重要区别。当然,从系统论证开始到目前的新一代“北斗”卫星全球组网,针对“北斗”短报文是非利弊的争论从未停止过,并大多集中在系统建设复杂性、代价与功效、应用特性与同类通信系统的可比性等系统设计、应用层面的问题。但在频率资源方面探讨不多,为此,下面重点讨论“北斗”短报文系统用频情况、背景和深远影响。 “Beidou ” system as one of the four major navigation satellite systems in the world, its short message function is the most important difference with several other navigation systems. Of course, from the beginning of the system demonstration to the new generation of “Beidou” satellite global networking, the argument that the short message “BeiDou” is non-pros and cons has never stopped, and most of them are focused on the complexity of system construction at the cost of Efficiency, application characteristics and comparability of similar communication systems such as system design, application level problems. However, there is not much discussion on the frequency resources. Therefore, the following discussion focuses on the frequency, background and far-reaching impact of the “Beidou” short message system.