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Title: Resource orchestration for virtualized mobile networks
Author: Gouareb, Racha
ISNI:       0000 0004 9351 4464
Awarding Body: King's College London
Current Institution: King's College London (University of London)
Date of Award: 2020
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The anticipated growth in cloud computing leads to looking for a new way to design, deploy, and manage network services. In this thesis, the problem of VNFs placement and routing across the physical hosts are studied to minimize overall latency. The latency is defined as the queuing delay within both, the edge clouds and the network links. In that respect, latency optimization takes a holistic view by considering not only VNFs chaining and placement problem but also considering the flows routing aspect. These two problems are inter-related and have a major impact on the network latency. The variation of the network traffic affects the network performance by increasing the response time of the control plan when it is overloaded, which raises the issue of reliability and scalability. Multi-controller SDN-based networks calls for approaching the problem of controllers assignment as a multi-objective problem, by assigning switches to controllers in order to balance the load between the controllers. Furthermore, in this thesis we have considered traffic load migration with respect to computing resources. To this end, two main problems are studied in this thesis: the placement and routing of Virtual Network functions, and controller assignment problem. We have considered different methods to measure a number of performance metrics such as delay and resource utilization. The analysis of simulation results and performance evaluations are presented to show the effectiveness of the proposed models in terms of latency and load balancing.
Supervisor: Friderikos, Vasilis ; Aghvami, Abdol-Hamid Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available