论文部分内容阅读
一、集群通信的兴起集群通信是20世纪70年代发展起来的一种较经济灵活的移动通信系统,是传统的专用无线调度通信的高级发展阶段。由于传统的无线调度系统整体规划性差、型号多制式杂、网小台多、覆盖面窄、通信质量差以及浪费频率资源等缺点,诞生了一种新的无线调度通信系统——集群通信系统。所谓集群通信就是系统的所有用户在系统中央控制器的管理下可
First, the rise of trunking communications Trunk communications is a more economical and flexible mobile communications system developed in the 1970s, which is a high-level development stage of the traditional dedicated wireless dispatching communications. Due to the poor overall planning of the traditional wireless dispatching system, the multi-system model, the small network coverage, the narrow coverage, poor communication quality and the waste of frequency resources, a new wireless dispatching communication system-trunking communication system was born. The so-called cluster communication is the system of all users in the system under the control of the central controller