未来sdn网络中的虚拟链路映射

R. Trivisonno, I. Vaishnavi, Riccardo Guerzoni, Z. Despotovic, A. Hecker, S. Beker, D. Soldani
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引用次数: 25

摘要

软件定义网络(SDN)是一种通过简化硬件、软件和管理来降低运营成本的高效网络技术。具体的研究重点是在可扩展性、可靠性、QoS和业务管理方面,通过SDN实现成功的运营商级网络。在文献中,目前关于使用该技术的交通工程(TE)的材料很少。本文提出了一种新的混合整数线性规划(MILP)公式,用于中央控制器计算底层网络基础设施上的最优端到端虚拟路径,同时考虑多个请求。广泛的仿真结果表明,该算法优于传统的最短路径优先(SPF)方法。在某些情况下,多达30%的虚拟连接被令人满意地映射到相同的基板上,与物理节点的数量无关。
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Virtual Links Mapping in Future SDN-Enabled Networks
Software defined networking (SDN) has emerged as an efficient network technology for lowering operating costs through simplified hardware, software and management. Specific research focus has been placed to achieve a successful carrier grade network with SDN, in terms of scalability, reliability, QoS and service management. In the literature, very little material is currently available on traffic engineering (TE) using this technology. This paper presents a novel mixed integer linear programming (MILP) formulation for a centralised controller to calculate optimal end-to-end virtual paths over the underlying network infrastructure, considering multiple requests simultaneously. Extensive simulation results, over a wide range of underlying network topologies and input parameters, demonstrate that the proposed algorithm outperforms traditional shortest path first (SPF) approaches. In some cases, up to 30 % more virtual connections were satisfactorily mapped onto the same substrate, independent of the number of physical nodes.
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