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随着网络传输能力的提升,网络故障的危害日益突出。对于多层网络来说,只采用单层的生存性策略可能会导致资源竞争的剧烈化和业务的过保护,这就需要对多层网络的生存性策略进行层间协调。该文研究了IP-WDM(wavelength division multiplexing)两层网络中的生存性问题,通过对网络中的拓扑进行重构,使得两层的问题转化为单层的问题,提出了两层网络的层间协调机制策略,并通过在硬件模拟平台进行数据传输和故障模拟对策略的有效性进行了验证。实验结果表明:采用层间协调机制后,发生故障时,业务传输能够获得更好的恢复效果,网络的生存性得到了提升。
With the improvement of network transmission capacity, the harm of network failure has become increasingly prominent. For a multi-layer network, adopting a single-layer survivability strategy may lead to severe resource competition and service over-protection, which requires inter-layer coordination of the survivability strategy of the multi-layer network. This paper studies the survivability of IP-WDM (wavelength division multiplexing) in two-layer network. By reconstructing the topology in the network, the two-layer problem is transformed into a single-layer problem. The coordination mechanism is adopted to verify the effectiveness of the strategy through data transmission and fault simulation on the hardware simulation platform. The experimental results show that after the layer coordination mechanism is adopted, the service transmission can get a better recovery effect when the fault occurs, and the survivability of the network is improved.