It is shown that the next call blocking probability is related to location update failure probability, call to mobility ratio and the previous call status.

理论分析结果表明，下一次呼叫阻塞率不仅和位置更新失败率、呼叫移动比有关，还与前一次呼叫状态有关。

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A mobile communication systems robustness in case of a location-database failure is improved without the need for periodic location update operations.

无需终端的周期性位置更新操作，即可使移动通信系统获得对位置数据库的容错能力。

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