论文部分内容阅读
采用LTR信令的F.A.S.T集群系统在解决系统内部无线用户之间的选呼方面存在两个缺点:(1)必须借助于有线电话网才能实现;(2)单工用户之间呼叫需占用两个信道。我们通过分析该系统的控制软件并进行有关实验,提出了通过在系统软件中判断起呼类型和采用交替发射主被叫信令的方法,实现了无线用户之间仅占一个信道进行选呼的功能,呼叫时不占用电话线路。
FAST cluster systems using LTR signaling have two drawbacks in addressing the selective call between wireless users within the system: (1) they must be implemented by means of a wired telephone network; (2) calls between simplex users occupy two channel. By analyzing the control software of the system and carrying out experiments, we put forward that by judging the originating type in the system software and adopting the method of alternately transmitting the calling and called signaling, it is achieved that only one channel is selected for calling between wireless users Function, call does not take up telephone lines.