Digital Distribution Frame DDF

Based on the traffic loads,GOS,channel number,tone calling flow and signaling processing flow,the author applies the Irish Formula with the help of practical engineering lessons,succeeding in deducing the number of digital trunk lines inside and outside the GSM network system and the theoretical calculation formula for signaling links.

依据话务量、呼损率、信道数、语音呼叫流程、信令处理流程等,并结合爱尔兰公式和工程经验推导出了GSM网络内部各局向和外部各局向的数字中继线路数、信令链路数的理论计算公式,为GSM系统的网络规划设计提供了理论依据,对其它数字移动通信系统的网络规划设计也具有借鉴作用。