弹性光数据中心网络的生存性研究
发布时间：2018-08-28 10:27
【摘要】：自然或者人为的灾难发生,使得灾难生存能力成为了通信网络中的主要挑战。数据中心网络提供的云服务为网络的生存性带来了新的机会。现在典型的网络结构是基于WDM的数据中心网络,而波分复用技术已经不能满足海量的信息需求。已经有相关的研究人员提出弹性光数据中心网络,该网络能够更加精细的分配频谱,同时又能支持云服务。弹性光数据中心网络的生存性已经成为了热点问题。本文首先介绍弹性光数据中心网络的特点和研究现状,介绍了弹性光数据中心网络的基础知识和技术,重点讨论了弹性光数据中心网络的路由和频谱分配等问题。针对容量受限的弹性光数据中心网络,本文基于整数线性规划(Integer Linear Programming,ILP)针对共享保护和专有保护提出算法来求解网络的最大吞吐量和最小频谱资源消耗量,并进行对比。仿真结果显示,共享保护的ILP算法在相同的网络吞吐量情况下,使用更少的频谱资源。这是因为在共享保护策略下,备用路径的链路能共享频谱资源,所以在相同的网络吞吐量下,共享保护所使用的频谱资源远远小于专有保护。为了进一步节省网络的频谱资源,本文在共享保护网络中,基于ILP比较任播和单播两种保护方式。由于在任播方式下,工作路径的目的节点是两个数据中心任意选择一个,而单播方式的源节点和目的节点都是确定的,在路径选择上,任播方式会更加的灵活。仿真结果显示基于任播方式的共享保护ILP算法与基于单播方式的共享保护ILP算法有着相同的网络吞吐量,但是任播方式使用的频谱资源显著低于单播方式。
[Abstract]:Natural or man-made disasters make disaster survivability a major challenge in communication networks. The cloud service provided by the data center network brings new opportunities for the survivability of the network. At present, the typical network structure is the data center network based on WDM, and wavelength division multiplexing (WDM) technology can not meet the needs of massive information. Some researchers have proposed a network of flexible optical data centers, which can distribute spectrum more finely and support cloud services. The survivability of elastic optical data center network has become a hot issue. This paper first introduces the characteristics and research status of elastic optical data center network, introduces the basic knowledge and technology of elastic optical data center network, and discusses the routing and spectrum allocation of elastic optical data center network. For elastic optical data center networks with limited capacity, this paper proposes an algorithm based on integer linear programming (Integer Linear Programming,ILP) for shared and proprietary protection to solve the maximum throughput and minimum spectrum resource consumption of the network. Simulation results show that the shared protection ILP algorithm uses less spectrum resources under the same network throughput. This is because the link of the alternate path can share the spectrum resources under the shared protection strategy, so the spectrum resource used by the shared protection is much smaller than that of the proprietary protection under the same network throughput. In order to further save the spectrum resources of the network, this paper compares two kinds of protection schemes based on ILP, anycast and unicast in the shared protection network. In any broadcast mode, the destination node of the working path is chosen arbitrarily by two data centers, while the source node and the destination node of the unicast mode are determined. In the path selection, any broadcast mode will be more flexible. The simulation results show that the shared protection ILP algorithm based on any broadcast mode has the same network throughput as the ILP algorithm based on unicast mode, but the spectrum resource used in any broadcast mode is significantly lower than that in unicast mode.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1;TP308
[Abstract]:Natural or man-made disasters make disaster survivability a major challenge in communication networks. The cloud service provided by the data center network brings new opportunities for the survivability of the network. At present, the typical network structure is the data center network based on WDM, and wavelength division multiplexing (WDM) technology can not meet the needs of massive information. Some researchers have proposed a network of flexible optical data centers, which can distribute spectrum more finely and support cloud services. The survivability of elastic optical data center network has become a hot issue. This paper first introduces the characteristics and research status of elastic optical data center network, introduces the basic knowledge and technology of elastic optical data center network, and discusses the routing and spectrum allocation of elastic optical data center network. For elastic optical data center networks with limited capacity, this paper proposes an algorithm based on integer linear programming (Integer Linear Programming,ILP) for shared and proprietary protection to solve the maximum throughput and minimum spectrum resource consumption of the network. Simulation results show that the shared protection ILP algorithm uses less spectrum resources under the same network throughput. This is because the link of the alternate path can share the spectrum resources under the shared protection strategy, so the spectrum resource used by the shared protection is much smaller than that of the proprietary protection under the same network throughput. In order to further save the spectrum resources of the network, this paper compares two kinds of protection schemes based on ILP, anycast and unicast in the shared protection network. In any broadcast mode, the destination node of the working path is chosen arbitrarily by two data centers, while the source node and the destination node of the unicast mode are determined. In the path selection, any broadcast mode will be more flexible. The simulation results show that the shared protection ILP algorithm based on any broadcast mode has the same network throughput as the ILP algorithm based on unicast mode, but the spectrum resource used in any broadcast mode is significantly lower than that in unicast mode.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1;TP308
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