On the Trade-Off Between Computational Load and Reliability for Network Function Virtualization

被引：31

作者：

Kang, Jinkyu ^{[1
]}

Simeone, Osvaldo ^{[2
]}

Kang, Joonhyuk ^{[3
]}

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] New Jersey Inst Technol, Ctr Wireless Informat Proc, ECE Dept, Newark, NJ 07102 USA

[3] Korea Adv Inst Sci & Technol, Dept Elect Engn, Daejeon 34141, South Korea

来源：

IEEE COMMUNICATIONS LETTERS | 2017年 / 21卷 / 08期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

Network function virtualization (NFV); virtual network function (VNF); resource allocation; reliability;

D O I：

10.1109/LCOMM.2017.2698040

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Network function virtualization enables the "softwarization" of network functions, which are implemented on virtual machines hosted on commercial off-the-shelf servers. Both the composition of the virtual network functions into a forwarding graph (FG) at the logical layer and the embedding of the FG on the servers need to consider the less-than-carrier-grade reliability of COTS components. This letter investigates the tradeoff between end-to-end reliability and computational load per server via the joint design of VNF chain composition (CC) and FG embedding (FGE) under the assumption of a bipartite FG that consists of a controller and regular VNFs. Evaluating the reliability criterion within a probabilistic model, analytical insights are first provided for a simplified disconnected FG. Then, a block coordinate descent method based on mixed-integer linear programming is proposed to tackle the joint optimization of CC and FGE. Via simulation results, it is observed that a joint design of CC and FGE leads to substantial performance gains compared with separate optimization approaches.

引用

页码：1767 / 1770

页数：4

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