This paper introduces the calculating formula of the CSSR and the factors influencing the CSSR,and makes classification of and analysis on the small regions where the CSSR in GSM network is low.

• 简述了呼叫建立成功率的计算公式和影响呼叫建立成功率的因素,对GSM网络中呼叫建立成功率低的小区进行了分类分析。