03 August 2021
09:00 Doctoral defense Fully distance
Theme
Management and orchestration driven by slicing 4G/5G mobile networks into core and transport
Student
Luciano Jerez Chaves
Advisor / Teacher
Advisor: Edmundo Roberto Mauro Madeira / Co-advisor: Islene Calciolari Garcia
Brief summary
The exponential growth of mobile users and traffic associated with new services and applications has driven mobile operators to evolve their networks, always looking for economically viable solutions. This evolution seeks the virtualization and programmability of networks, technologies that are critical for the 5G era. As a result, network slicing is becoming a reality, creating multiple logical networks over a shared infrastructure and adapting resources to specific services intelligently and efficiently. However, the dynamic nature of network slices, their distinct quality of service requirements, and the indispensable sharing of resources across the infrastructure make traditional management and orchestration solutions currently applied to mobile networks unsuitable for the context of network slice. In this thesis, we first introduce UNI5ON: a slice-oriented framework designed for integrated management and orchestration of an SDN-based transport network shared across dedicated 4G/5G mobile core slices, also based on SDN. The striking feature of this framework is the structured communication between SDN controllers at the infrastructure and core levels through SDN applications positioned in the NFV MANO. Thus, controllers and applications can work in unison towards integrated solutions for multi-tenant networks. As a case study, we instantiated UNI5ON with an OpenFlow transport network and improved 4G core slices. In this scenario, we explore the tight integration between the core and transport domains to implement collaborative solutions for traffic engineering and cooperative solutions for resource management. Among the proposed solutions, we highlight two management mechanisms internal to the network slices for elasticity of connection bridges and aggregation of traffic at the user level. These built-in mechanisms work together with a bandwidth sharing solution between network slices that aims to better share infrastructure resources. We evaluated the proposed solutions for the scenario of this case study through packet-level simulations on ns-3, with the help of our OFSwitch13 module to support the OpenFlow protocol. The results confirmed the effectiveness of the joint operation of the proposed solutions and the relevance of the integrated orchestration to improve the use of infrastructure resources, ensuring the quality of service requirements of each slice of the network.
Examination Board
Headlines:
Edmundo Roberto Mauro Madeira IC / UNICAMP
Lisandro Zambenedetti Granville INF / UFRGS
Rafael Pasquini FACOM / UFU
Christian Rodolfo Esteve Rothenberg FEEC / UNICAMP
Juliana Freitag Borin IC / UNICAMP
Substitutes:
Cecília Mary Fischer Rubira IC / UNICAMP
Leandro Aparecido Villas IC / UNICAMP
Eduardo Coelho Cerqueira ITEC / UFPA