View on 5G Architecture

1 5 GPPP Architecture Working Group View on 5G Architecture Version , December 2017. Date: 2017-12-15 Version: 5 GPPP Architecture Working Group 5G Architecture White Paper Abstract The 5G Architecture Working Group as part of the 5 GPPP 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 5 GPPP 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 5 GPPP Phase 1 projects and initiatives. Capitalizing on the architectural vision and framework set by the first version of the white paper, this Version of the white paper presents the latest findings and analyses with a particular focus on the concept evaluations, and accordingly it presents the consolidated overall Architecture design.

3 Dissemination level: Public Page 2 / 140. 5 GPPP Architecture Working Group 5G Architecture White Paper Table of Contents 1 13. 2 Overall 14. 5G Services, Applications and Use Cases .. 15. Network Slicing .. 17. Network Slicing Context, Definition and 18. 5G Functional Layers .. 19. Network Slicing Characteristics and Life-cycle management .. 22. Slice Moderation: Inter-Slice/Intra-Slice Control and Management .. 24. Business Realization and 28. Possible Extensions .. 31. Programmability & Softwarization .. 32. Management and Orchestration.

4 35. 5G Security Architecture .. 36. Security Characteristics of 5G and new requirements .. 37. The security 37. Underlying concepts .. 37. Security methods .. 43. Mapping to overall 5G Architecture .. 43. 44. 3 Radio Access .. 48. SW controlled Architecture definition .. 49. Control/User Plane Split .. 51. Protocol stack integration 53. PDCP level integration .. 53. MAC level integration .. 54. LTE and 5G RAN interworking .. 57. Centralised and distributed RRM .. 60. Enhanced/new network access functions .. 63. Initial access.

5 63. Dynamic Traffic Steering .. 66. RAN Moderation .. 67. Cell clustering .. 67. Mobility Management .. 68. Self-backhauling .. 69. 71. 4 Physical Infrastructure and Deployment .. 72. Physical infrastructure 72. Physical access 77. Monitoring of workload 82. 83. 5 Softwarization and 5G Service Management and 84. Enabling Technologies .. 86. Multi-Tenancy Support .. 86. Multi-tenancy in the RAN .. 88. Cloud and Virtualization Technologies .. 89. Network Programmability .. 90. Services and Service Design .. 92. Service 92. ETSI NFV.

6 92. OASIS TOSCA .. 93. Dissemination level: Public Page 3 / 140. 5 GPPP Architecture Working Group 5G Architecture White Paper IETF Service Function Chaining .. 93. OGF 94. On-demand 94. Verification of deployed services .. 95. Machine learning in Service Planning .. 97. Management and Orchestration .. 101. Embedding of Virtual Functions .. 101. Service Assurance and Monitoring .. 101. Life-Cycle Management .. 102. Automated deployment of physical and virtual infrastructures .. 104. Multi-Domain and Multi-Operator Operation .. 104.

7 Secure Multi Domain Interfaces .. 106. Self -Organizing Networks and Services .. 108. Automated/Cognitive network management .. 108. Autonomic network management framework .. 112. Balancing autonomy against explicit control: A pragmatic approach .. 114. 114. 6 Impact on standardization .. 117. Major standardization bodies targeted by 5 GPPP .. 117. Significant standardization areas of impact by 117. Overall 5G Architecture , Use Cases and Key requirements .. 118. Network Softwarisation and Key Requirements .. 121. Network Management and Key Requirements.

8 123. Network Slicing and Key Requirements .. 126. Radio/ Wireless Network Interworking and Interfaces .. 128. Wireless/Wireline Network Interworking and Interfaces .. 130. Other Enablers (OpenSource) .. 131. 7 Conclusions and Outlook .. 133. Assessment of KPI achievements for 5 GPPP Phase 1 projects .. 133. Extremely high data rates .. 133. Significant energy reduction at the radio access .. 134. Reducing service creation time .. 135. Very low end-to-end latency for time-critical 135. Massive connectivity of devices .. 136. High performance in high mobility 136.

9 Positioning accuracy .. 136. Outlook on KPI achievements for 5 GPPP Phase 2 projects .. 137. 8 List of Contributors .. 138. Dissemination level: Public Page 4 / 140. 5 GPPP Architecture Working Group 5G Architecture White Paper List of Acronyms and Abbreviations 5 GPPP 5G Infrastructure Public Private Partnership AaSE AIV (Air Interface Variant) agnostic Slice Enabler ADC Analogue Digital Conversion AF Adaptation Function AI Air Interface AI Artificial Intelligence AIV Air Interface Variant AL Abstraction Layer AMF Access and Mobility Management Function AN Access Network AP Access Point API Application Programming Interface ARP Allocation and Retention Priority ARQ Automatic Repeat reQuest B2B Business to Business B2C Business to Consumer BB Base Band BBU Base Band Unit BH Backhaul BS Base Station BSS Business Support System B-TAG Backbone VLAN Tag BTS Base

10 Transceiver Station C3 Central Controller and Coordinator CA Certification Authority CAPEX Capital Expenditure CDF Cumulative-Distribution-Function CDN Content Distribution Network CH Cluster Head CM Connection Manager CMDB Configuration Management Database CMS Catalogue Management System CN Core Network COTS Common Off The Shelve Dissemination level: Public Page 5 / 140. 5 GPPP Architecture Working Group 5G Architecture White Paper CP Control Plane CPRI Common Public Radio Interface CPU Central Processing Unit CQI Channel quality Indicator C-RAN Cloud Radio Access Network cRRM Centralised Radio Resource Management CSAT Carrier Sense Adaptive Transmission CSE Circuit Switching Element CSE Cognitive Smart Engine CSI-RS Channel State Information-Reference Signal CU Centralised Unit DAC Digital Analogue Conversion DC Data Centre DC Dual Connectivity DEI Drop Eligible Indicator DL Download DPDK