基于软件定义架构的IP与光融合网络控制技术研究

发布时间：2018-01-05 16:27

本文关键词：基于软件定义架构的IP与光融合网络控制技术研究　出处：《北京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着新型业务的不断涌现,传统的IP网络与光网络分离的控制模式将导致昂贵的建设成本和运营成本。由于数据业务带宽的爆炸式增长,这种成本代价与日俱增,而异构网络的统一控制是解决上述问题的关键所在。本论文针对IP网络与光网络统一控制需求,建立了一种基于软件定义的融合网络控制模型,提出了一种面向资源优化的Bypass实现机制,设计了基于软件定义的层间故障协同恢复方案,完成了层间故障协同恢复策略的仿真,验证了所提方案与策略的正确性。主要工作和创新成果如下：一、针对现有IP网和光传送网分离控制而带来的成本昂贵、资源浪费等问题,提出了一种基于软件定义的融合网络控制模型,通过控制器间信息交互,完成了对异构网络的集中控制,实现了IP网络与光网络的统一控制与资源最优利用。二、基于上述融合模型,提出了一种面向资源优化的Bypass实现机制,通过IP层和光层控制器之间的协作,可以实现Bypass算法的动态加载,完成大宽带业务的灵活提供,达到IP与光网络资源的全局优化,提高网络的可靠性和资源利用率。三、针对多层网络中的层间故障问题,设计了基于软件定义的层间故障协同恢复方法,在此基础上提出了两种基于多层协同的多业务恢复策略——BCLR (Bundle Cross-Layer Link Restoration)策略和SCLR(Separate Cross-Layer Link Restoration Scheme)策略。测试结果表明,与传统的多层网络恢复方法相比,所提的策略能有效提高层间链路故障的恢复成功率以及网络资源利用率,使网络阻塞率降低30%以上,资源利用率提高约10%。
[Abstract]:With the continuous emergence of new services, the traditional control mode of separation of IP network and optical network will lead to expensive construction cost and operation cost, due to the explosive growth of data service bandwidth. The cost is increasing, and unified control of heterogeneous networks is the key to solve these problems. According to the unified control requirements of IP network and optical network, this paper establishes a fusion network control model based on software definition, and proposes a resource optimization oriented Bypass implementation mechanism. A fault cooperative recovery scheme based on software definition is designed, and the simulation of inter-layer fault cooperative recovery strategy is completed, which verifies the correctness of the proposed scheme and strategy. The main work and innovative results are as follows: Firstly, aiming at the problems of high cost and waste of resources brought by the separation control of IP network and optical transport network, a fusion network control model based on software definition is proposed, which can exchange information between controllers. The centralized control of heterogeneous network is completed, the unified control of IP network and optical network and the optimal utilization of resources are realized. Secondly, based on the above fusion model, a resource optimization oriented Bypass implementation mechanism is proposed. Through the cooperation between IP layer and optical layer controller, the dynamic loading of Bypass algorithm can be realized. The flexible provision of large broadband services can achieve the global optimization of IP and optical network resources and improve the network reliability and resource utilization. Thirdly, aiming at the problem of interlayer fault in multi-layer network, a method of inter-layer fault cooperative recovery based on software definition is designed. On this basis, two multi-service recovery strategies based on multi-layer collaboration are proposed: BCLR bundle Cross-Layer Link restoration). Policies and SCLR(Separate Cross-Layer Link Restoration schemeThe test results show that. Compared with the traditional multi-layer network restoration method, the proposed strategy can effectively improve the success rate of inter-layer link fault recovery and network resource utilization, and reduce the network blocking rate by more than 30%. The utilization rate of resources has increased by about 10%.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP393.06;TN929.1

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