An Approach for Virtual Network Function Deployment Based on Pooling in vEPC

Quan YUAN, Hongbo TANG, Yu ZHAO, Xiaolei WANG

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Summary :

Network function virtualization improves the flexibility of infrastructure resource allocation but the application of commodity facilities arouses new challenges for systematic reliability. To meet the carrier-class reliability demanded from the 5G mobile core, several studies have tackled backup schemes for the virtual network function deployment. However, the existing backup schemes usually sacrifice the efficiency of resource allocation and prevent the sharing of infrastructure resources. To solve the dilemma of balancing the high level demands of reliability and resource allocation in mobile networks, this paper proposes an approach for the problem of pooling deployment of virtualized network functions in virtual EPC network. First, taking pooling of VNFs into account, we design a virtual network topology for virtual EPC. Second, a node-splitting algorithm is proposed to make best use of substrate network resources. Finally, we realize the dynamic adjustment of pooling across different domains. Compared to the conventional virtual topology design and mapping method (JTDM), this approach can achieve fine-grained management and overall scheduling of node resources; guarantee systematic reliability and optimize global view of network. It is proven by a network topology instance provided by SNDlib that the approach can reduce total resource cost of the virtual network and increase the ratio of request acceptance while satisfy the high-demand reliability of the system.

Publication
IEICE TRANSACTIONS on Communications Vol.E101-B No.6 pp.1398-1410
Publication Date
2018/06/01
Publicized
2017/12/08
Online ISSN
1745-1345
DOI
10.1587/transcom.2017EBP3211
Type of Manuscript
PAPER
Category
Network

Authors

Quan YUAN
  National Digital Switching System Engineering & Technological R&D Center
Hongbo TANG
  National Digital Switching System Engineering & Technological R&D Center
Yu ZHAO
  National Digital Switching System Engineering & Technological R&D Center
Xiaolei WANG
  National Digital Switching System Engineering & Technological R&D Center

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