孟相如2,
康巧燕2,
韩晓阳1
1.空军工程大学研究生院? ?西安? ?710051
2.空军工程大学信息与导航学院? ?西安? ?710077
基金项目:国家自然科学基金(61401499)
详细信息
作者简介:苏玉泽：男，1990年生，博士生，研究方向为虚拟网络映射、网络生存性
孟相如：男，1963年生，教授，研究方向为下一代网络、网络安全
康巧燕：女，1980年生，副教授，研究方向为网络生存性、下一代网络
韩晓阳：男，1986年生，博士生，研究方向为虚拟网络映射、网络优化
通讯作者:苏玉泽 glgiuip@163.com
中图分类号:TP393计量
文章访问数:1267
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被引次数:0
出版历程
收稿日期:2018-07-20
修回日期:2019-01-31
网络出版日期:2019-03-16
刊出日期:2019-07-01
Core Link Aware Survivable Virtual Network Link Protection Method
Yuze SU1,,,Xiangru MENG2,
Qiaoyan KANG2,
Xiaoyang HAN1
1. Graduate College, Air Force Engineering University, Xi’an 710051, China
2. Information and Navigation College, Air Force Engineering University, Xi’an 710077, China
Funds:The National Natural Science Foundation of China (61401499)
摘要
摘要:针对现有可生存虚拟网络链路保护方法无差别对待所有虚拟链路、备份资源消耗多且故障后网络恢复时延长的问题，该文提出一种核心链路感知的可生存虚拟网络链路保护(CLA-SVNLP)方法。首先，综合考虑虚拟链路动态和静态两方面因素构建虚拟链路核心度度量模型，依据虚拟网络生存性需求，对核心度较高的虚拟链路进行备份保护；其次，将p圈引入可生存虚拟网络链路保护，依据虚拟网络特点构建p圈，为核心虚拟链路提供1:N保护，即每条核心虚拟链路平均消耗1/N条的备份链路带宽资源以减少备份链路资源消耗，并将单物理链路保护问题转化为多个p圈内的单虚拟链路保护问题；最后网络编码技术与p圈结合，将备份链路对核心虚拟链路提供的1:N保护转化为1+N保护，避免了故障后定位、检测及数据重传。仿真结果表明，该方法提高了备份资源利用率且缩短了故障后的网络恢复时延。
关键词:可生存虚拟网络/
链路保护/
核心链路感知/
p圈/
网络编码
Abstract:In order to solve the problems of all virtual links take without discrimination, high backup resource consumption and long network recovery delay after failures in existing survivable virtual network link protection methods, a Core Link Aware Survivable Virtual Network Link Protection (CLA-SVNLP) method is proposed. At first, the core degree metric model of virtual link is constructed by considering virtual link dynamic and static factors. According to virtual network survivable needs, virtual links with high core degrees are protected by backup resources. Then the p-cycle is introduced into survivable virtual network link protection and the p-cycle is constructed based on the characteristics of virtual network to provide 1:N protection for core virtual links. That means each core virtual link consumes 1/N backup link bandwidth resources and the backup link resource consumption is reduced. It also transforms the single physical link protection into single virtual link protection in multiple p-cycles. At last, the network coding and p-cycle are both used to transform the 1:N protection into 1+N protection for core virtual links which avoids fault location, detection and data retransmission after failures. Simulation results show that the proposed method can improve the utilization of backup resource and shorten the network recovery delay after failures.
Key words:Survivable virtual network/
Link protection/
Core link aware/
P-cycle/
Network coding
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