Abstract
Key technologies of disaster tolerant intelligent network are briefly introduced at first. After the hot-standby disaster tolerant IN architecture is analyzed, a load-sharing mode is proposed which has no downtime during switchover. By constructing the availability models of local clustered subsystem and the load-sharing disaster tolerant IN system based on birth-death process, it is proved that the load-sharing- based disaster tolerant IN system can meet the high availability requirement for disaster tolerance.
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