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

作　　者：王汝言[1] 路振山[1] 吴大鹏[1] 黄胜[1] 

机构地区：[1]重庆邮电大学重庆市光纤通信技术重点实验室,重庆400065

出　　处：《光通信技术》2010年第3期30-33,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(60972096)资助;重庆市教委科学技术研究项目(KJ070511;KJ080513)资助;重庆市科委科技攻关项目(CSTC2005AC2089)资助;教育部春晖计划项目(教育部教外司留[2007]567号)资助

摘　　要：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.

关 键 词：光突发交换 恢复机制 区分服务 抢占 

分 类 号：TN915[电子电信—通信与信息系统]