Browsing by Author "Moerman, Ingrid"

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    Breaking Down Network Slicing: Hierarchical Orchestration of End-to-End Networks
    Santos, Joao F.; Liu, Wei; Jiao, Xianjun; Neto, Natal V.; Pollin, Sofie; Marquez-Barja, Johann M.; Moerman, Ingrid; DaSilva, Luiz A. (IEEE, 2020-10-01)
    Network slicing is one of the key enabling techniques for 5G, allowing Network Providers (NPs) to support services with diverging requirements on top of their physical infrastructure. In this paper, we address the limited support and oversimplified resource allocation on different network segments of existing End-to-End (E2E) orchestration solutions. We propose a hierarchical orchestration scheme for E2E networks, breaking down the E2E resource management and network slicing problems per network segment. We introduce a higherlevel orchestrator, the hyperstrator, to coordinate the distributed orchestrators and deploy Network Slices (NSs) across multiple network segments. We developed a prototype implementation of the hyperstrator and validated our hierarchical orchestration concept with two proof-of-concept experiments, showing the NS deployment and the impact of the resource allocation per network segment on the performance of NSs. The results show that the distributed nature of our orchestration architecture introduces negligible overhead for provisioning NSs in our particular setting, and confirm the need of a hyperstrator for coordinating network segments and ensuring consistent QoS for NSs.
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    Mandate-driven Networking Eco-system: A Paradigm Shift in End-to-End Communications
    Moerman, Ingrid; Zeghlache, Djamal; Shahid, Adnan; Santos, Joao F.; DaSilva, Luiz A.; David, Klaus; Farscrotu, John; de Ridder, Ad; Liu, Wei; Hoebeke, Jeroen (IEEE, 2020-01-01)
    The wireless industry is driven by key stakeholders that follow a holistic approach of “one-system-fits-all” that leads to moving network functionality of meeting stringent End-to- End (E2E) communication requirements towards the core and cloud infrastructures. This trend is limiting smaller and new players for bringing in new and novel solutions. For meeting these E2E requirements, tenants and end-users need to be active players for bringing their needs and innovations. Driving E2E communication not only in terms of quality of service (QoS) but also overall carbon footprint and spectrum efficiency from one specific community may lead to undesirable simplifications and a higher level of abstraction of other network segments may lead to sub-optimal operations. Based on this, the paper presents a paradigm shift that will enlarge the role of wireless innovation at academia, Small and Medium-sized Enterprises (SME)’s, industries and start-ups while taking into account decentralized mandate-driven intelligence in E2E communications.