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生存性是ＡＴＭ网络中亟待解决的问题．文中在介绍了当前ＡＴＭ网络中基于ＶＰ层的故障恢复机制后，引入生存重要性因子表征网络中不同服务的生存重要性，定义了加权恢复率；基于关键服务生存性保证的要求，提出了关键ＶＣ预建立保护连接和关键ＶＣ优先的实时恢复两种解决方式，并综合形成了关键服务生存性的保证机制．分析和模拟的结果表明该机制能优先保证关键服务的恢复，有效地提高了整个网络的生存能力
Survivability is a problem to be solved in ATM network. After introducing the fault recovery mechanism based on VP layer in current ATM networks, this paper introduces survival importance factor to represent the survival importance of different services in the network and defines the weighted recovery rate. Based on the requirements of the key service survivability guarantee, the key is proposed VC pre-established protection connection and key VC priority real-time recovery of the two solutions, and integrated the formation of a critical service survivability assurance mechanism. Analysis and simulation results show that the mechanism can give priority to ensure the recovery of key services, effectively improve the viability of the entire network