MSc.Thesis Defense:İdil Bensu Çılbır

VIABILITY-BASED CONTROL FOR ROBUSTNESS IN 6G NETWORKS: ENSURING EFFICIENT COMMUNICATION UNDER EXTREME CONDITIONS

İdil Bensu ÇILBIR
Electronics Engineering, MSc. Thesis Dissertation, 2024

Thesis Jury

Prof. Özgür ERÇETİN (Thesis Advisor), Prof. Özgür GÜRBÜZ

, Assoc. Prof. Ertuğrul BAŞAR

Date & Time: 22th July, 2024 –  10:30 AM

Place: FENS L029

Keywords : Viability, Control, Optimization, Dynamical Network Systems, Efficient

Communication

Abstract

The fifth generation of communications, 5G, is presently being deployed in commercial networks worldwide. Novel 6G technologies, which are the next beyond 5G technology, are investigated, including Key Performance Indicators such as delay, network capacity, and user terminal motion velocity. A 6G network is conceived to bring together nomadic, mobile, and stationary extreme edge devices into a single resource pool, which includes mobile and vehicular user equipments, on-board units, and automation-guided vehicles.

The network is inherently uncertain, which complicates service management and decision-making. Extreme edge load has a substantial impact on resource allocation, and heavy workloads or transmission disruptions can result in service degradation and safety concerns. In such cases, local decisions must be made by the entities of the network to guarantee back to safety while achieving the goal.

This thesis proposes a paradigm shift in the design of robust control plane systems, viewing failure as the norm rather than the exception. It is represented by introducing a concept called viability theory, which is a less common but theoretically robust framework that ensures system safety with effective communication and robustness even during severe overloads or outages. The controller aims to obtain sub-optimal local decisions and increase availability to achieve viability. The performance of our proposed method is demonstrated under different network topologies and scenarios, and its improvement in efficient communication is also shown.