This paper proposes a general model and approach to analyze the bidirectional call-overflow scheme for an arbitrary Hierarchical Cellular System (HCS) with N layers, as illustrated by a 4-layer HCS.

• 该文给出了N层蜂窝覆盖系统双向呼叫溢出信道指配策略的一般模型及分析方法，并给出了一个4层模型分析结果。