Abstract
Network segregation is the solution adopted in the IMT-2020 standardization of the International Telecommunications Union (ITU), better known as 5G networks (Fifth Generation Mobile Networks), under development to meet the requirements of performance, reliability, energy, and economic efficiency required by applications in the various verticals of current and near-future economic activities. The philosophy adopted for the IMT-2020 standardization relies on the use of Software-Defined Networking (SDN), Network Function Virtualization (NFV), and Software-Defined Radio (SDR), i.e., the softwarization of the network. Softwarization allows network segregation through its slicing, which is discussed herein this work. Network slicing is performed by a novel Orchestrator, as provided in IMT-2020, which maintains the end-to-end network slices independent of each other and performs horizontal handover when the possibility of a loss of Quality of Service (QoS) is predictively detected by monitoring quality parameters during operation. Therefore, the Orchestrator is dynamic, operates in uptime, and allows horizontal handover. Hence, it chooses the most appropriate telecommunication infrastructure provider and network operator to guarantee QoS and Quality of Experience (QoE) to end-users in each network segment. These features make this work modern and keep it aligned with the actions being carried out by ITU. Based on this objective, as the main result of this paper, we propose an effective architecture for implementing the Orchestrator, not only to contribute to the state of the art for 5G and beyond communication systems but also to generate economic, technological, and social impacts.
Highlights
The advent of the Internet of Things (IoT) [1,2,3] and the possibility of processing in the entire network cloud (Distributed Cloud Computing, from the core to the edges of the network [4]) are some of the numerous projections to be intertwined with Fifth GenerationMobile Networks (5G) and next-generation wireless communication systems (6G and beyond), allowing them to offer faster mobile services under higher frequencies waves and offer new applications [5,6,7,8]
Our work presents a new approach that employs several techniques aiming at the integration and interoperability between Radio Access Network (RAN) networks and the core of the proposed orchestration architecture based on an efficient and robust Slice Selection Service (SSS) that provides compatibility with the specification standards in progress (e.g., 3GPP, European Telecommunications Standards Institute (ETSI) NFVI, and 5G Infrastructure Public Private Partnership (5G-PPP))
To start proving the operational efficiency of our Orchestrator, we focused some experimental tests on the Multi-Provider Network Slice Selector, which are related to its Collector, Processor, and Decision Maker modules
Summary
The advent of the Internet of Things (IoT) [1,2,3] and the possibility of processing in the entire network cloud (Distributed Cloud Computing, from the core to the edges of the network [4]) are some of the numerous projections to be intertwined with Fifth GenerationMobile Networks (5G) and next-generation wireless communication systems (6G and beyond), allowing them to offer faster mobile services under higher frequencies waves and offer new applications [5,6,7,8]. Fifth Generation Mobile Networks are not just a simple evolution of mobile telecommunications technologies but a true revolution, in which computing and telecommunications technologies are present in the same architecture, aiming to solve the problem of connectivity for any class of service, regardless of its non-functional requirements [9,10]. Fifth Generation Mobile Networks promote rapid and massive adoption of new solutions [11], as they allow using legacy networks and, when required, among others, very high broadband Internet speeds (greater than 1 Gbps), low latency (1 ms) [12,13], and high reliability (99.9999%) [13], providing profound transformations in several industries, in addition to enabling the emergence of business models that would currently be unfeasible at the hospital, logistical, vehicle traffic levels, and so on [14]. To use of all the network resources according to the end-users’ demands, network slicing and orchestration are essential [16]
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