Resilience and survivability of 5G networks
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5G is going to be the central force behind the Fourth Industrial Revolution. It is the next-generation wireless technology which is slated to provide a wide range of services. It is geared to provide greater capacity, increased energy efficiency, and lower latency. A critical issue in service delivery is to provide resilience in 5G networks. In this thesis, we present 5G network architecture with network virtualization with multiple providers 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. We also envision an environment where 5G network resilience is addressed in the presence of unlicensed spectrum and non-terrestrial networks. In this prospect, we present a framework for network survivability with network virtualization with multiple providers, and the use of unlicensed spectrum band and non-terrestrial network (NTN); this is done along with a self-organizing ad hoc network among the gNBs that may use a secondary provider for network resilience when the aggregation network and the backhaul network fails. In this architecture, we present an optimization model for survivability for a 5G networks provider (primary provider) that may also use a secondary provider in the event of a failure along with unlicensed spectrum and NTN. Our simulations show (1) the trade-off between using a primary provider's own network or rely on auxiliary capacity from the secondary provider, and (2) the use of unlicensed spectrum band and NTN enhances the resilience of the network.
Table of Contents
Introduction -- Research survey -- 5G Architecture for Resilience -- Proposed Optimization and Heuristic for 5G Network Resilience -- Unlicensed Spectrum band and Non-Terrestrial Network -- An Integrated 5G Architecture for Survivability -- Conclusion -- Appendix A. Optimization model file -- Appendix B. Heuristic code -- Appendix C. Topology Generation
Ph.D. (Doctor of Philosophy)