集群通信又称为专用业务调度系统，是移动通信的一种。它是随着微电子技术和计算机技术的高度发展，为缓解频率资源紧张与用户需求日益增长的矛盾，由传统的无线对讲系统逐步发展而来的。由于集群通信系统提供了高效、高速、直接、准确的服务，因而已受到越来越多的重视和应用? Cluster communication, also known as private business scheduling system, is a kind of mobile communication. It is with the development of microelectronics and computer technology, in order to ease the contradiction between the frequency of resource constraints and the increasing demand of users, the traditional wireless intercom system gradually evolved. As trunking communication system provides efficient, high-speed, direct and accurate service, it has received more and more attention and application.