| 双链路故障时的共享路径保护 |
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| 引用本文： | 陈春风,范戈.双链路故障时的共享路径保护[J].光纤与电缆及其应用技术,2007(6):33-36. |
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| 作者姓名： | 陈春风 范戈 |
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| 作者单位： | 上海交通大学,"区域光纤通信网与新型光通信系统"国家重点实验室,上海,200240 |
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| 基金项目： | 广东省深圳市华为技术有限公司资助项目 |
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| 摘 要： | 在波长路由光网络中,网络的存活性已经受到越来越多的重视.对单链路故障时的保护已经不能满足某些关键性业务对网络存活性的要求,因而研究了双链路故障时的共享路径保护技术.在动态业务下,将共享路径保护问题归结为整数线性规划.在节点无波长转换能力的情况下,分别提出了为当前业务计算最优路径和固定路径两种策略下的整数线性规划.数值结果表明,相对于专用保护,双链路故障时的共享路径保护能够节约30%左右的波长链路资源.
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| 关 键 词： | 波长路由光网络 共享保护 专用保护 整数线性规划 |
| 文章编号： | 1006-1908（2007）06-0033-04 |
| 收稿时间： | 2007-06-18 |
| 修稿时间： | 2007年6月18日 |
Shared Path Protection against Double-Link Failures |
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| CHEN Chun-feng,FAN Ge.Shared Path Protection against Double-Link Failures[J].Optical Fiber & Electric Cable and Their Applications,2007(6):33-36. |
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| Authors: | CHEN Chun-feng FAN Ge |
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| Abstract: | In wavelength-routed optical networks, network survivability has received more and more attention. The recovery from single-link failures is no more able to meet the requirement of some critical services on network survivability. Consequently, shared path protection against double-link failures is studied. Under dynamic traffic, shared path protection is reduced to integer linear programming. In the optical networks without wavelength convertibility, integer linear programming for two strategies, i.e. optimal routing and fixed routing, for the current trattqc is proposed. The numerical results show that the shared path protection against double-link failures could achieve a saving of about 30% of the wavelength-link resources, compared with the dedicated protection. |
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| Keywords: | wavelength-routed optical networks shared protection dedicated protection integer linear programming |
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