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A traffic scheduling strategy based on cost function for differentiated class of service in multi-domain optical networks

机译：基于成本函数的多域光网络差异化服务级的流量调度策略

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摘要

The emerging cloud computing, IoT, bulk-data store-and-forward datacenter applications are dominating the Internet traffic, which contains the commercial and business data services and behaves periodically. The traffic peak remains high during a certain time each day (known as peak traffic hours). This results in heavy load on the network, leading to higher level of connections blocking. In order to handle such a critical situation in evolving multi-vendor/multi-operator based multi-domain optical networks (MDONs), prioritization of connection requests based on the differentiated class of service (CoS) is a must. The differentiated CoS (DiffCoS) may be categorized as: CoS1-delay-tolerant, CoS2-deadline-driven, and CoS3-fixed scheduled (or hard time bounded) traffic. To avail the maximum benefit of DiffCoS traffic characteristics, proper planning and efficient resource provisioning during admission phase is essential for the network service providers. A traffic scheduling strategy based on cost function (TSSCF) for DiffCoS in MDON is proposed, in which the connection requests are arranged in decreasing order of the cost function, and the route is selected based on shortest path minimum domain criterion, as per which the shortest route traversing or passing through the minimum number of domains is chosen. The simulations are performed on three-domain ARPANET topology, and the results are evaluated for different intra and inter-domain request ratios i.e., 1:1, 3:2 and 7:3, under 1:1:1 ratio of various CoSs. The simulation results of the proposed TSSCF strategy show significant improvement on the metric of blocking probability (BP), individual CoS BP, resource utilization ratio, and a newly introduced metric called revenue index as compared to the existing strategies.
机译：新兴云计算，物联网，批量数据存储和转发数据中心应用程序占据了Internet流量，其中包含商业和业务数据服务并定期行为。在每天（称为峰值交通时间）的特定时间内，交通峰值仍然很高。这导致网络上的沉重负载，导致更高级别的连接阻塞。为了在不断发展的多供应商/多操作员的多域光网络（MDONS）中处理这种关键情况，基于差异化服务类（COS）的连接请求的优先级是必须的。分化化的COS（衍射）可以分类为：COS1 - 延迟容忍，COS2-截止日期驱动，以及COS3固定的调度（或硬时界限）流量。为了利用差异流量特性的最大利益，录取阶段的适当规划和高效资源供应对于网络服务提供商至关重要。提出了一种基于MDON中的衍射域的成本函数（TSCF）的流量调度策略，其中连接请求以降低成本函数的顺序排列，并且基于最短路径最小域标准选择路由，根据该路径最小域标准选择遍历或通过最小域数的最短路径。对三域ArPanet拓扑进行模拟，结果是针对不同帧内和域间请求比的评估结果。，1：1,3：2和7：3，在1：1：1的不同焦点的比例下。所提出的TSCF策略的仿真结果显示了对现有策略相比，对阻塞概率（BP），单个COS BP，资源利用率的指标进行了显着改善，以及新引入的指标。

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