Toward Optimal Resource Allocation of Virtualized Network Functions for Hierarchical Datacenters

Wang, Chih-Chiang; Lin, Ying-Dar; Wu, Jang-Jiin; Lin, Po-Ching; Hwang, Ren-Junn

doi:10.1109/tnsm.2018.2862422

Cited by 20 publications

(12 citation statements)

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“…Also, such prediction models can be used as cloud management tools. The SLR conducted in this paper, found several studies related to the context of network design, such as [67](ID03), [68](ID09), [69](ID29), [70](ID30), [71](ID38), [72](ID51), [73](ID62), and [74](ID64). Nevertheless, none of them directly addressed the capacity plan aspect, making it an open research challenge.…”

Section: F Capacity Planningmentioning

confidence: 99%

NFV Data Centers: A Systematic Review

2020

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This work was supported under Grants for Brazilian PhD students with Coordination for the Improvement of Higher Education Personnel (CAPES). ABSTRACT Recently, the widespread use of Network Function Virtualization (NFV) has meant a significant shift in communication and network cloud-based services. NFV increases network function, allocation, and flexibility, for the implementation of new network services, The benefits from optimizing resource allocation in NFV data center include automation of the operational processes, reducing the operational efforts, and lowering capital costs. Despite being a hot topic, NFV data centers are still in their early stages. In this sense, there are some aspects involved in the current NFV implementations that required further investigation, such as performance evaluation and managemen. This paper presents an in-depth analysis of NFV applications in data center. Therefore, a Systematic Literature Review (SLR) was conducted aimed at studying and synthesizing the available works in the NFV state-of-the-art. Consequently, about 1,408 papers have been analyzed and filtered, evidencing a total of 65 relevant studies. This paper documents the relevance of the 65 papers, as well as provides an indepth insight into the primary open research questions concerning NFV architecture. In particular, highlighting the need for consolidating the integration of NFV in data centers by solving problems related to performance, dependability, resource allocation, cost, management, and resource interoperability. Based on the conducted SLR, several research gaps and open challenges have been identified, allowing the authors to provide new propositions and suggested future research avenues. Finally, the obtained results have shown that there is a strong need for further collaboration between academia and industry to conduct quality research and advance NFV practical implementations. INDEX TERMS Network function virtualization (NFV), software defined networking (SDN), cloud computing, data center, service function chain (SFC), performance evaluation.

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Section: F Capacity Planningmentioning

confidence: 99%

NFV Data Centers: A Systematic Review

2020

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“…However, the results are yet to be optimized, and they have not considered inter-DC service chaining. The articles [14], [16] and [27] discuss layered architecture but only vertical connectivity, and not the horizontal connectivity issue. The major differences of this paper compared to the other work noted are: 1) First, all of the papers on inter-DC focus on either cost and latency or cost and capacity but not all three together, which is the key contribution of this paper.…”

Section: ) Inter-dcmentioning

confidence: 99%

“…The mapping that satisfies Equations (16) and 17is feasible where the summation is taken over all A(u), A(v), satisfying the equalities.…”

Section: E Problem Analysismentioning

confidence: 99%

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Communication and Computing Cost Optimization of Meshed Hierarchical NFV Datacenters

Kar

Lin³

2020

IEEE Access

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Telecommunication carriers of 5G-MEC are re-architecting their central offices and mobile base stations as datacenters with network function virtualization (NFV) technology. These datacenters (DCs) are known as edge datacenters that help network operators speed deployment and reduce costs. Previously, the use of NFV was limited to within a datacenter (DC) known as intra-DC. Recently, many studies have been conducted into the use of NFV across DCs, i.e., inter-DC. However, these NFV inter-DC architectures have limited communication between DCs with either horizontal or vertical connectivity. In this paper, we propose a generic architecture of such edge NFV datacenters with both horizontal and vertical connectivity, and demonstrate the consequences of both vertical and horizontal connectivity between DCs in terms of communication and computing costs. We formulate a cost optimization problem with latency and capacity as constraints by estimating the traffic dispatch rate between DCs. We propose a vertical-horizontal communication (VHC) heuristic solution to the NP-hard problem. Compared to horizontal connectivity, our results show that vertical connectivity helps to reduce computing costs by 10-30%. However, both vertical and horizontal communications together can help to reduce such costs by 20-30% compared to only vertical communication. INDEX TERMS Inter-DC connectivity, VNF placement, service chaining, communication, computing. BINAYAK KAR (Member, IEEE) received the Ph.D. degree in computer science and information engineering from National Central University

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“…The research activity on NFV has been focused on the solution of the SFC Routing and Cloud and Bandwidth resource Allocation (SRCBA) problem [1]; it is composed of two subproblems: (i) the Service Function Chaining (SFC) routing and (ii) the allocation of network and computing resources for the execution of Virtual Network Function Instances (VNFI). The performance indexes used to characterize an SRCBA algorithm are the number of SFCs accepted, the server power consumption [2], the bandwidth used to interconnect the VNFIs [3], the cloud resource amount needed to activate the VNFIs and so on [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Segment Routing Technology in Reducing the Bandwidth and Cloud Resources Provisioning Times in Network Function Virtualization Architectures

et al. 2019

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Network Function Virtualization is a new technology allowing for a elastic cloud and bandwidth resource allocation. The technology requires an orchestrator whose role is the service and resource orchestration. It receives service requests, each one characterized by a Service Function Chain, which is a set of service functions to be executed according to a given order. It implements an algorithm for deciding where both to allocate the cloud and bandwidth resources and to route the SFCs. In a traditional orchestration algorithm, the orchestrator has a detailed knowledge of the cloud and network infrastructures and that can lead to high computational complexity of the SFC Routing and Cloud and Bandwidth resource Allocation (SRCBA) algorithm. In this paper, we propose and evaluate the effectiveness of a scalable orchestration architecture inherited by the one proposed within the European Telecommunications Standards Institute (ETSI) and based on the functional separation of an NFV orchestrator in Resource Orchestrator (RO) and Network Service Orchestrator (NSO). Each cloud domain is equipped with an RO whose task is to provide a simple and abstract representation of the cloud infrastructure. These representations are notified of the NSO that can apply a simplified and less complex SRCBA algorithm. In addition, we show how the segment routing technology can help to simplify the SFC routing by means of an effective addressing of the service functions. The scalable orchestration solution has been investigated and compared to the one of a traditional orchestrator in some network scenarios and varying the number of cloud domains. We have verified that the execution time of the SRCBA algorithm can be drastically reduced without degrading the performance in terms of cloud and bandwidth resource costs.

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Toward Optimal Resource Allocation of Virtualized Network Functions for Hierarchical Datacenters

Cited by 20 publications

References 18 publications

NFV Data Centers: A Systematic Review

NFV Data Centers: A Systematic Review

Communication and Computing Cost Optimization of Meshed Hierarchical NFV Datacenters

Effectiveness of Segment Routing Technology in Reducing the Bandwidth and Cloud Resources Provisioning Times in Network Function Virtualization Architectures

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