Network Virtualization and Survivability of 5G Networks
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Network Virtualization and Survivability of 5G Networks Rohit Abhishek1 · David Tipper2 · Deep Medhi1 Received: 18 December 2019 / Revised: 6 May 2020 / Accepted: 18 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract 5G networks are slated to provide a wide range of services. A critical need in service delivery in 5G networks is its resilience. In this work, we present a 5G network architecture with network virtualization in a multiple provider setting for network resilience that uses a self-organizing ad hoc network among the gNBs (macrosites). Thus, the primary provider for a 5G network may use a secondary provider for network resilience when network components fail. We present an optimization formulation and a heuristic for network survivability for our proposed 5G network for the primary network provider. Through simulations, we show our proposed heuristic is very close to optimal. The simulation results on the trade-off between using a provider’s own network or rely on auxiliary capacity from another provider allow us to see the trade-off on availability. Finally, we study how priority can be provided for certain traffic groups for service survivability.
1 Introduction 5G networks are expected to be 10–100 times faster with increased energy efficiency and much lower latency than the current 4G LTE networks. It will use the New Radio (NR) and is expected to be integrated along with the existing 4G LTE architecture and is supposed to use unlicensed frequencies such as 3.5 GHz spectrum besides low spectrum frequencies such as 600 MHz. To provide increased data capacity, 5G is expected to use small cells, which will be the key functionality of 5G networks along with key factor features like carries aggregation and self-organizing networks (SON). * Deep Medhi [email protected] Rohit Abhishek [email protected] David Tipper [email protected] 1
University of Missouri-Kansas City, Kansas City, MO, USA
2
University of Pittsburgh, Pittsburgh, PA, USA
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Vol.:(0123456789)
Journal of Network and Systems Management
In general, the 5G network architecture will enable the creation of mobile networks on cloud-based virtualization platforms and will offer different cloud-based services. Software-defined networking (SDN) will be used in the 5G architecture to slice the sub-networks, which can be used for higher bandwidth requirements [1]. This would help maintain the CAPEX (Capital Expenditure) and OPEX (Operational Expenditure) while reducing latency and making it more energyefficient for the exploding traffic [2]. For 5G networks, network functions will be software-defined including the core network functions such as MME (Mobile Management Entity), P-GW (Packet Gateway), S-GW (Serving Gateway) and will run as virtualized network functions (VNF) in the cloud, making the network infrastructure more flexible, manageable, and energy-efficient. This would enable the evolved packet core (EPC) to be used/offered as a service (EPCaaS) [3]. The software-defined network controller wo
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