集群系统信道利用率分析

Analysis of Channel efficiency in Trunking System

集群系统以提高频谱利用率为目的，本文首先深入浅出地探讨了集群系统信道动态分配的特点，讨论了其对提高信道利用率、降低阻塞率、提高系统容量的好处，然后较为详细地论证了系统容量、阻塞率和信道数间的关系，着重介绍了Ｍｏｔｏｒｏｌａ的系统容量计算经验公式。文中较多地引用了翔实准确的数据，如日本Ｓｔａｎｄａｒｄ的阻塞率与信道数关系曲线、信道数与用户数关系示意，美国ＭｏｔｏｒｏｌａＳｍａｒｔｎｅｔ的话务处理能力数据等，较为有力地论证了有关论点，同时对有关人员也具有一定的数据资料参考价值。

The goal of trunking system is to improve the efficiency of freqency spectrum. At first,thisarticle discusses the features of dynamic assignment of Channels in trunking system and its advantage to im-proving the efficiency of channles,reducing congestion and enldarging system capacity. Then,it deduces therelation of system capacity,congestion and channels in detail,emphasisly introdues the experimental equo-tion of system capacity in Motorola system. In the article,many data,which firmly support relative con-cepts and give reference to relative technician,are exactly used. Examples include the relation curve of con-gestion ratio and channel number,the relation figure of channel number and subscriber number in JapaneseStandard;data of traffic handling capacity in American Motorola Smartnet, etc.