Browsing by Author "Gour, Riti"
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Item Embedding Chains of Virtual Network Functions in Inter-Datacenter Networks(Institute of Electrical and Electronics Engineers Inc.) Kobayashi, H.; Ishigaki, Genya; Gour, Riti; Jue, Jason P.; Shinomiya, N.; Ishigaki, Genya; Gour, Riti; Jue, Jason P.This paper discusses the problem of embedding service function chains (SFCs) in an interconnected network with multiple datacenter sites. The problem is formulated as a Subtopology Composition Problem (SCP), which is to design a subnetwork that includes terminal nodes and datacenter nodes from the substrate network, aimed at optimizing distance-based latency in SFCs. The intractability of the problem is discussed, and a heuristic is proposed for the problem. Simulations are conducted to demonstrate the effectiveness of the proposed method in different graph models. © 2018 IEEE.Item Proactive Dynamic Network Slicing with Deep Learning Based Short-Term Traffic Prediction for 5G Transport Network(IEEE, 2019-03-03) Guo, Qize; Gu, Rentao; Wang, Zihao; Zhao, Tianyi; Ji, Yuefeng; Kong, Jian; Gour, Riti; Jue, Jason P.; Kong, Jian; Gour, Riti; Jue, Jason P.We propose a proactive dynamic network slicing scheme that utilizes a deep-learning based short-term traffic prediction approach for 5G transport networks. The demonstration shows utilization efficiency improvement from 46.33% to 71.53% under the evaluated scenario.Item Towards Improving Resilience of Network Slices Through Protection and Localization(2021-07-20) Gour, Riti; Jue, JasonThe scope of the telecommunication industry is expanding due to the inclusion of a diverse range of applications that requires a dynamic resource provisioning mechanism to accommodate the changes over time while also ensuring robustness against failures. These applications are deployed on the shared physical infrastructure through network slicing, which partitions the available shared resources, customizing them for specific services. Network slicing is supported through enabling technologies like Software Defined Networking (SDN) and Network Function Virtualization (VNF). SDN aids the network operators with the ability to manage the traffic effectively, whereas, NFV helps in the cost-efficient migration of network functions. The ability of network slices to continue to support the service requirements of applications is enabled by methodologies that improve the robustness by utilizing cost-effective measures. This dissertation explores four problems towards robust network design from the perspective of network operators. Conventional approaches to ensuring robustness in networks entail protection and recovery mechanisms against single network component failures. However, addressing robustness against multiple network component failures introduce additional challenges from the perspective of the network operator. To address this issue, the first problem discusses a protection mechanism to deploy survivable routing in multi-domain networks against geographically correlated failures. The second problem discussed here is a localizavii tion technique to deduce which set of physical links have failed by monitoring the state of the network slices (virtual links) deployed on the physical infrastructure. Finally, the next two problems ensure that the availability of the services is satisfied. In particular, a network slice composition problem is presented for specific applications while guaranteeing the availability requirements of the services and minimizing the cost of resources used. The ideas discussed in this dissertation utilize simple yet efficient algorithms which gear the network operators with cost-efficient techniques to provide resilience to its users.