VNF Placement Strategy for Availability and Reliability of Network Services in NFV

Alahmad, Yanal; Agarwal, Anjali

doi:10.1109/sds.2019.8768620

Cited by 12 publications

(13 citation statements)

References 8 publications

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“…The works in earlier studies [13][14][15][16][17][18][19][20][21][22][23][24] addressed the SFC availability considering the failure of VNF.…”

Section: Availability Of Sfcmentioning

confidence: 99%

Availability‐aware virtual network function placement based on multidimensional universal generating functions

Arakawa,

Oki

2023

Int J Network Mgmt

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Network function virtualization (NFV) implements network functions as software, which enables flexible, resource‐efficient, and rapid provision of network services. In NFV, network services are realized by the service function chain (SFC), which is a chain of virtual network functions (VNFs) linked in the proper order. Both availability and deployment cost are key concerns for network operators providing network services as SFC. This paper proposes a flexible VNF placement model on a per‐VNF instance basis that minimizes deployment costs while satisfying availability requirements that may be placed on SFC. This paper uses a multidimensional universal generating function (MUGF) method, which is a multistate system analysis method, to compute the availability of a multistate SFC system with multiple VNFs coexisting on a server. The MUGF method calculates the performance of the entire SFC by combining the performance of servers as determined by applying a continuous‐time Markov chain. To reduce the time to compute the SFC availability, we introduce operators to be applied to MUGF and develop an availability computing method. In addition, a heuristic algorithm for determining VNF placement targeting the lowest deployment cost possible while meeting availability requirements is presented. Numerical results show that the proposed model obtains VNF placement with lower cost than the conventional model in all examined cases. The proposed model achieves VNF placement at 58.5%–75.0% of the deployment cost of the conventional model for the same SFC availability requirements.

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“…The works in earlier studies [13][14][15][16][17][18][19][20][21][22][23][24] addressed the SFC availability considering the failure of VNF.…”

Section: Availability Of Sfcmentioning

confidence: 99%

Availability‐aware virtual network function placement based on multidimensional universal generating functions

Arakawa,

Oki

2023

Int J Network Mgmt

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“…Moreover, other works tackled the SFC provisioning problem considering availability requirements [6], [7] and protection [6], [8]- [11]. For instance, Ref.…”

Section: Related Workmentioning

confidence: 99%

Availability Evaluation of Service Function Chains Under Different Protection Schemes

Asdikian

Askari

Ayoub

et al. 2022

2022 IEEE International Mediterranean Conference on Communications and Networking (MeditCom)

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Network Function Virtualization (NFV) calls for a new resource management approach where virtualized network functions (VNFs) replace traditional network hardware appliances. Thanks to NFV, operators are given a much greater flexibility, as these VNFs can be deployed as virtual nodes and chained together to form Service Function Chains (SFCs). An SFC represents a set of dedicated virtualized resources deployed to provide a certain service to the consumer. One of its most important performance requirements is availability. In this paper, the availability achieved by SFCs is evaluated analytically, by modelling several protection schemes and given different availability values for the network components. The cost of each protection scheme, based on its network resource consumption, is also taken into account. Extensive numerical results are reported, considering various SFC characteristics, such as availability requirements, number of NFV nodes and availability values of network components. The lowest-cost protection strategy, in terms of number of occupied network components, which meets availability requirement, is identified. Our analysis demonstrates that, in most cases, resource-greedy protection schemes, such as end-to-end protection, can be replaced by less aggressive schemes, even when availability requirements are in the order of five or six nines, depending on the number of elements in the service function chain.

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“…They focused on the recovery order of the servers, considering the number of functions available during the recovery process. Alahmad et al [84] modeled the reliability requirements of network services and proposed an optimized deployment strategy from reliability perspectives of network service. Although several studies have worked on this issue, reliability-aware embedding is still a crucial direction.…”

Section: Reliability-aware Embeddingmentioning

confidence: 99%

A survey of VNF forwarding graph embedding in B5G/6G networks

et al. 2021

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VNF Placement Strategy for Availability and Reliability of Network Services in NFV

Cited by 12 publications

References 8 publications

Availability‐aware virtual network function placement based on multidimensional universal generating functions

Availability‐aware virtual network function placement based on multidimensional universal generating functions

Availability Evaluation of Service Function Chains Under Different Protection Schemes

A survey of VNF forwarding graph embedding in B5G/6G networks

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