Open AccessJoint balancing of IT and spectrum resources for selecting virtualized network function in inter-datacenter elastic optical networks
Author(s) -
Yajie Li,
Yongli Zhao,
Bo Li,
Xiaosong Yu,
Hui Yang,
Xinbo Wang,
Jie Zhang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.015116
Subject(s) - computer science , provisioning , load balancing (electrical power) , survivability , computer network , distributed computing , benchmark (surveying) , network service , virtualization , network performance , virtual network , resource allocation , cloud computing , geometry , mathematics , geodesy , geography , grid , operating system
With network functions decoupled from specific hardware, network function virtualization (NFV) is a promising technology to accelerate service provisioning in datacenter (DC) networks. In inter-datacenter elastic optical networks, each virtualized network function (VNF) is usually deployed in multiple DCs for the sake of survivability. In service provisioning, different VNF selections greatly affect IT resources in DCs as well as spectrum resources in optical networks. This paper investigates how to select appropriate VNFs for service requests to achieve joint load balancing of IT and spectrum resources. Two joint balancing factors are proposed to quantify the impact of different VNF selections on network load. Furthermore, a Joint-Optimization Selection (JOS) algorithm is designed to select VNFs in a joint load balancing manner. The performance of the proposed algorithm is evaluated in terms of resource utilization, blocking probability and average path length. Simulation results indicate that the proposed algorithm outperforms the benchmark algorithm.