Cost function‐based class of service provisioning strategy in elastic optical networks

Abstract

SummaryThe recent fog‐and‐cloud computing, Internet of things (IoT), artificial intelligence, machine learning, and store‐and‐forward datacenter applications gradually increase the Internet traffic. The arrival of this traffic is periodic, which remains high during certain time duration (known as peak or working/office hour) each day, resulting in an increase in the resource bottleneck problem, which causes high connections blocking. Due to these, many commercial and business data services may lose their connections which contain the urgent and important information. In order to handle such a critical situation in elastic optical networks (EONs), prioritization of connection requests based on the differentiated class of service (CoS) is a must. In this paper, the network traffic is categorized into three CoS requests. These are CoS1 (real‐time traffic), CoS2 (nonreal‐time traffic), and CoS3 (delay‐tolerant traffic) and proposed a cost function‐based CoS provisioning (CFCoSP) strategy in which the connection requests are served as per an increasing value of cost function. The cost function is a cumulative function of CoS, pathlength, and requested bandwidth demand (i.e., number of frequency slots required). The simulations are performed on INDIAN and ARPANET network topologies under uniform CoS ratio (i.e., CoS1:CoS2:CoS3 = 1:1:1) on the metrics of connection established, bandwidth blocking probability, resource utilization ratio, and network capacity utilization. The simulation results verify that the proposed CFCoSP strategy shows significantly improved performances as compared to an existing non‐cost CoS provisioning (CoSP) strategy on the investigated metrics.

Enhancing the Efficiency of Resilient Multipath-Routed Elastic Optical Networks: A Novel Approach for Coexisting Protected and Unprotected Services with Idle Slot Reuse

“…In terms of the coexistence of different service classes in the network, there are also recent works investigating the theme. Dixit et al [ 20 ] and Batham et al [ 21 ] consider three distinct classes of service (CoSs) coexisting in the network: CoS1 for real-time traffic (e.g., online audio–video traffic), CoS2 for nonreal-time traffic (e.g., compressed video and transactional data traffic), and CoS3 for delay-tolerant traffic (such as store-and-forward bulk data file transfer between various data centers). Liu et al [ 22 ] investigate the coexistence of services with different levels of priorities, and they assumed that the priority levels can be arbitrarily defined by the network provider and its users via service level agreement (SLA).…”