SDN TABANLI OPTİK AĞLARDA TRAFİK YÖNETİMİ

Year 2019, Volume: 15 Issue: 2, 99 - 111, 29.11.2019

Elif Bozkaya

Abstract

Bu çalışma, optik ağlarda Yönlendirme ve Dalga Boyu Ataması (RWA) problemine odaklanmaktadır. Optik Ağlar, artan bant genişliği taleplerinin yerine getirilmesi için kritik öneme sahiptir ve kısıtlı ağ kaynakları nedeniyle gelen ışık yolu isteklerini yönetmek zordur. Bu problem çözümüne yönelik, Yazılım Tanımlı Ağ (SDN) paradigması ile optik ağlar için bir kuyruk teorisi temelli model önerilmiştir. Burada, trafik yönetimi bir denetleyici tarafından kontrol edilmektedir. Daha spesifik olarak, ele alınan senaryoda, merkezi bir kontrolör, kuyruk yaklaşımı ile modellenmiş, kaynak ve hedef düğüm çiftleri arasındaki ışık yolu talepleri planlanmıştır. Kapsamlı değerlendirmeler, ışık yolunun tesisinin optik ağlarda önerilen kuyruk teorisi yaklaşımı ve SDN paradigması ile geliştirilebileceğini göstermektedir.

Keywords

Optik Ağlar, Trafik Yönetimi, Yazılım Tabanlı Ağlar, Yönlendirme ve Dalga Boyu Ataması

TRAFFIC MANAGEMENT IN SDN-BASED OPTICAL NETWORKS

Abstract

This paper investigates Routing and Wavelength Assignment (RWA) problem in Optical Networks. Optical Networks are critical for handling increased bandwidth demands; and it is difficult to manage lightpath requests due to the lack of network resources. To overcome this challenge, a queuing theory based framework for Optical Networks is proposed with Software-Defined Networking (SDN) paradigm. Here, traffic management is controlled by a centralized controller. More specifically, in the considered scenario, a controller is modeled with a queuing approach, and lightpath requests between source and destination node pairs are scheduled. The thorough evaluations show that the assigned lightpath can be increased with the proposed queuing based SDN model in Optical Networks.

Keywords

Optical Networks, Traffic Management, SDN, Routing and Wavelength Assignment

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