OBS网络中基于优先级抢占的恢复机制

Fast restoration scheme based on preemption for optical burst switched networks

提出一种新的支持光突发交换网络中优先级抢占的快速恢复机制。该机制对不同优先级的业务采取不同的恢复策略,实现故障的快速恢复。同时采用阈值检测方式支持优先级抢占,减少受影响链路中较高优先级业务的丢包。仿真结果表明,基于优先级抢占的恢复机制具有较低的丢包率,对高优先级业务丢包率性能改善更为明显。

In this paper, a novel fast restoration scheme based on preemption for optical burst switched networks is proposed. The scheme takes different restoration actions according to wavelength resource of node to provide fast differentiated restoration services, and gets lower burst loss rate of high-priority traffic with preemption. Through detailed descriptive analysis and a comprehensive simulation study, the scheme demonstrate low fault management overheads, and excellent burst loss performance, especially for the high-priority traffic, and gives us higher recovery success rate as well.