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本文首先介绍了HA概念和HA的计算模型,然后在PSTN的HA模型的基础上.详细介绍了3G移动系统端到端的HA模型,基于这个HA模型.可以计算出整个3G系统的可用性或者不可用性。
Based on the HA model of the PSTN, the HA model of the end-to-end 3G mobile system is introduced in detail. Based on this HA model, the availability or non-availability of the entire 3G system can be calculated .