View on 5G Architecture

1 5G PPP Architecture Working Group view on 5G Architecture Version , June 2019. Date: 2019-06-19 Version: Dissemination level: Public Consultation Abstract The 5G Architecture Working Group as part of the 5G PPP Initiative is looking at capturing novel trends and key technological enablers for the realization of the 5G Architecture . It also targets at presenting in a harmonized way the architectural concepts developed in various projects and initiatives (not limited to 5G PPP projects only) so as to provide a consolidated view on the technical directions for the Architecture design in the 5G era.

2 The first version of the white paper was released in July 2016, which captured novel trends and key technological enablers for the realization of the 5G Architecture vision along with harmonized architectural concepts from 5G PPP Phase 1 projects and initiatives. Capitalizing on the architectural vision and framework set by the first version of the white paper, the Version of the white paper was released in January 2018 and presented the latest findings and analyses of 5G PPP Phase I projects along with the concept evaluations. The work has continued with the 5G PPP Phase II and Phase III projects with special focus on understanding the requirements from vertical industries involved in the projects and then driving the required enhancements of the 5G Architecture able to meet their requirements.

3 The results of the Working Group are now captured in this Version , which presents the consolidated European view on the Architecture design. Dissemination level: Public Consultation Table of Contents 1 18. 2 Overall 19. Stakeholder roles in the 5G ecosystem .. 19. 5G Enhanced Overall System Architecture .. 20. E2E Service Operations Lifecycle Management .. 22. Domain Management & Orchestration .. 23. Multi-domain management .. 23. Application-aware orchestration .. 24. Service-specific extensions of ETSI NFV MANO .. 25. Programmable Networks .. 26. Data plane programmability.

4 26. Transport network programmability .. 28. Network function programmability in RAN .. 28. Vertical-specific Architecture extensions .. 29. Extensions for energy utilities .. 29. Extensions for vehicular communications .. 30. Extensions for enhanced content delivery .. 32. Extensions for media production and delivery .. 32. 33. 3 Radio & Edge Architecture .. 35. Overall RAN Architecture .. 35. Centralized-Distributed-Radio Units split and Control-User Planes separation .. 36. Protocol Extensions for Vertical Support .. 37. RAN Part of Network Slicing .. 37. Fundamental Slicing Support in RAN.

5 37. Wi-Fi virtualization and slicing .. 38. RAN Analytics .. 40. Virtualized Small Cell (Cloud-enabled small cell) at the Light Data Centre .. 41. Multi-access Edge Computing & Energy Efficient Radio Access Networks .. 43. Multi-link Cooperation .. 45. Local end-to-end Path .. 47. Multicast and Broadcast in RAN .. 48. RAN Architecture Implementation .. 51. RAN Deployment Options .. 51. Visible Light Communication-based gNB .. 53. Lower Layer Split and Implementation .. 56. Baseband processing in active antenna distributed unit .. 56. Optical Beamforming .. 58. Edge Architecture .

6 60. XMEC: extension of edge computing functionalities .. 60. 61. 4 Core & Transport Architecture .. 64. 64. Core Network Architecture .. 64. Multicast and Broadcast .. 65. Analytics Framework .. 67. Data Analytics Characterization .. 68. Integrated Analytics Architecture .. 69. Transport network Infrastructure .. 71. Wireline technologies .. 71. Programmable Elastic frame-based Optical Transport .. 71. Ethernet Transport .. 73. Dissemination level: Public Consultation Programmable Metro Network - Disaggregated Edge Node .. 75. Space Division Multiplexing .. 77. Wireless.

7 79. Millimeter wave (mmWave) .. 79. Multi-tenant small cells with IAB .. 80. Satellite Backhaul .. 82. Fiber-Wireless (FiWi) 84. Examples of data plane programmability .. 87. Programmable Data Plane .. 87. Stateful Packet Processing in Hardware .. 88. Segment routing .. 90. 90. 5 Management & Orchestration Architecture .. 93. 93. Starting point: Existing High-level MANO 93. ETSI summary .. 93. ETSI NFV & MANO .. 93. ETSI ZSM .. 93. ETSI ENI .. 94. ETSI MEC .. 94. 3 GPP .. 94. Status and consensus Architecture .. 95. Example aspect: Heterogeneity .. 97. Architecture options beyond the consensus Architecture .

8 99. Structure of orchestration .. 99. Service-type: Integrated or segregated orchestration .. 99. Flat vs. hierarchical orchestration .. 100. Orchestration vs. slicing .. 101. Abstractions and their violations .. 102. Conflict resolution .. 103. Time scales .. 104. 104. Implementation patterns for MANO frameworks .. 105. Algorithmic building blocks .. 106. Example building blocks .. 106. Realizations, MAPE-K 107. Description mappings .. 108. Horizontal mapping .. 108. Vertical mapping .. 109. Monitoring aspects in Orchestration .. 109. DevOps meets Orchestration .. 110.

9 Development time: SDKs .. 110. Need for validation tools .. 111. Need for evaluation tools .. 111. 112. 6 Deployment, Evaluations & Analyses .. 114. 114. Performance KPIs .. 114. Types of evaluation and usability of KPIs .. 115. Approach/options to generation of KPIs .. 116. Architecture instantiations .. 117. Deployment and Analysis for Architecture WP V3 .. 120. Management and orchestration .. 120. Verification and Validation System .. 122. Emulation Framework .. 124. Dissemination level: Public Consultation 125. 7 Impact on standardization .. 126. Brief profile of targeted SDOs.

10 126. 3 GPP .. 126. ETSI .. 127. 127. IETF .. 128. Other 128. Standards impact by 5G PPP Phase 2 projects .. 129. Contributions related to overall architectures .. 129. Contributions related to radio and edge architectures .. 130. Contributions related to core and transport architectures .. 131. Contributions related to management and orchestration architectures .. 132. Fostering Standardization via 5G PPP .. 133. 134. 8 Conclusions and Outlook .. 135. 9 Glossary .. 138. General Terms .. 138. Network function virtualization related .. 138. Network slice related .. 140.