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Title page 1

Contents 3

Summary 2

1. Scope 4

2. References 4

3. Definitions 4

3.1. Terms defined elsewhere 4

3.2. Terms defined in this Technical Report 4

4. Abbreviations and acronyms 4

5. Introduction 7

6. Template for testbeds and their federations 7

7. Federated testbeds use cases 7

Appendix I. Template for use cases related to testbeds and their federations 8

Appendix II. Use cases on testbed federations 10

UC01: Testbed on roaming scenarios (IMS interconnection) 10

UC02: Testing IMS emergency calling 14

UC03: Rapid network resources deployment for disaster scenarios 17

UC04: Testbed for smart cities 19

UC05: Automated construction and demolition waste management using digital twin for buildings 21

UC06: Testing of open architecture systems 23

UC07: Federated testbed for cybersecurity 26

UC08: Blockchain based methodology for zero trust modelling and quantification for IMT-2020 networks 28

UC09: Federation of smart city services 30

UC10: Federated testbed for cloud and networking research 34

UC11: Federation of smart city water treatment and distribution services 37

UC12: End-to-end design, development of IMT-2020 testbed 40

UC13: Continuous integration/continuous deployment framework 43

UC14: Integration testing with any commercial RAN and UE 45

UC15: Large scale UE testing 46

UC16: Orchestration 48

UC17: Standards version compliance check for error-free interoperability between RAN and 5GC testbeds 49

UC18: Support for zero trust architecture in federated testbeds 51

Appendix III. End-to-end UE registration in IMT-2020 networks 53

Appendix IV. End-to-end network slicing for IMT-2020 54

Bibliography 55

Appendix Figures 13

Figure II.1. Local break out (LBO) roaming with proxy call signalling control function (P-CSCF) in visited public mobile network (VPMN) using... 13

Figure II.2. LBO roaming with P-CSCF in HPMN using 5GS to support IMS services [b-GSMA PRD IR.65] 13

Figure II.3. LBO with P-CSCF in VPMN with loopback possibility using 5GS to support IMS services [b-GSMA PRD IR.65] 13

Figure II.4. Home routed roaming using 5GS to support IMS services [b-GSMA PRD IR.65] 14

Figure II.5. Enhanced packet core (EPC) non-roaming architecture and reference points 17

Figure II.6. UE/IMS architecture and reference points 17

Figure II.7. Network architecture for a physical disaster scenario [b-SLICES-DS D2.5] Figure 1 19

Figure II.8. Open AI and integration layer 26

Figure II.9. 5G open architecture testbed [b-ARXIV] 28

Figure II.10. Blockchain-based zero trust architecture 30

Figure II.11. General architecture for the federation connecting different user to dispersed CPSs 33

Figure II.12. Real-time data exchange and communication in the federated CPS experiment 33

Figure II.13. Reference points for UC10 [b-IoT-week-2021] 36

Figure II.14. Architectural framework of UC10 37

Figure II.15. The general architecture for the federation connecting different user to dispersed CPSs 39

Figure II.16. Architecture for the experiment federation 40

Figure II.17. High-level view of AMF design 42

Figure III.1. End-to-end call flow of the UE registration 53

Figure IV.1. End-to-end call flow of the slice selection procedure during UE registration 54