Çok Alanlı YTA'da Blok Zinciri Tabanlı Yönlendirme Üzerinden Yol Seçim Stratejilerinin Etki Analizi

Son on yılda, Yazılım Tanımlı Ağ Oluşturma (YTA), bilgisayar iletişimi alanında en yaygın kullanılan buluşlardan biri haline geldi. OpenFlow tarafından etkinleştirilen YTA mimarisi, diğer pek çok övgüye değer avantajın yanı sıra, ağ yöneticilerine ağlar arasındaki akışlar için Uçtan Uca (E2E) Hizmet Kalitesi (QoS) garantili yollar sağlama konusunda yardımcı olma potansiyeline sahiptir. Daha önceki çalışmamızda, ağlar arası QoS provizyonu için blok zincir teknolojisi ve SDN'nin faydalarını birleştiren QoSChain'i tanıtmıştık. Bu çerçeve, ağlar arası politika otomasyonu, güvence, E2E görünürlüğü, kontrol ve doğrulamayı etkinleştirmek için yazılım odaklı bir trafik yönetim sistemini düzenler. Bu çalışmada, yol seçim stratejilerinin genel QoSChain performansı üzerindeki etkisine odaklanıyoruz. Spesifik olarak, beş basit ama etkili yol seçim stratejisinin performansını değerlendiriyoruz: İlk Uygun Yol Seçimi (FFPS), Rastgele Uygun Yol Seçimi (RFPS), Minimum Atlama Yolu Seçimi (MHPS), Sınır Ağ Geçidi Protokolü (BGP) ile ağlar arası düzeyde FFPS (FFPS_BGP) ve Sınır Ağ Geçidi Protokolü (BGP) ile ağlar arası düzeyde MHPS (MHPS_BGP). Deneysel sonuçlarımız, başlangıçta daha uzun kurulum süreleri olmasına rağmen üstün performans sağlayan atlama sayısı minimizasyonu ile yol seçiminin genel performans için çok önemli olduğunu göstermektedir.

Anahtar Kelimeler:

Servis Kalitesi, Blokzincir, YTA, Çoklu Alan, Yol Seçimi

Impact Analysis of Path Selection Strategies over Blockchain-based Routing in Multi-Domain SDN

Over the past decade, Software-Defined Networking (SDN) has become one of the most widely used inventions in the field of computer communications. SDN architecture enabled by OpenFlow, among many other praised advantages, has the potential to assist network administrators in providing End-to-End (E2E) Quality of Service (QoS)-guaranteed paths for flows among networks while providing finer-granular flow management. In our earlier work, we introduced QoSChain, which combines the benefits of blockchain technology and SDN for inter-network QoS provisioning. This framework orchestrates a software-driven traffic management system to enable cross-network policy automation, assurance, E2E visibility, control, and validation. In this study, we focus on the impact of path selection strategies on the overall QoSChain performance. Specifically, we evaluate the performance of five simple but effective path selection strategies: First Feasible Path Selection (FFPS), Random Feasible Path Selection (RFPS), Minimum Hop Path Selection (MHPS), FFPS with the Border Gateway Protocol (BGP) shortest path at inter-network level (FFPS_BGP), and MHPS with the BGP shortest path at inter-network level (MHPS_BGP). Our experimental results indicate that path selection is crucial to overall performance with hop count minimization delivering superior performance at the expense of initially longer setup times.

Keywords:

QoS, SDN, Blockchain, Inter-Domain, Path Selection,

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