5G/NR Architecture Is it revolutionary or evolutionary?

Transcription

1 5G/NR Architecture Is it revolutionary or evolutionary? The 5G-MoNArch view David M. Gutierrez Estevez Senior 5G Researcher Samsung Electronics R&D Institute UK IEEE CSCN, September 2017

2 Initial Thoughts Evolution or revolution? It depends how revolutionary these key concepts sound: Network function (NF)-centric view of architecture Cloudification of networks However, cloud computing has extensively occupied itself with virtualization Solutions from cloud frameworks will need to be enhanced considering central/edge cloud trade-offs: Centralising RAN provides mux gains, but timescales involved in RAN functions are much smaller than those considered in cloud solutions. Cloud resources are typically limited at the edge but centralisation consumes substantial resources in the x-haul and poses strict requirements on the network 2/14

3 Initial Thoughts: ETSI NFV How revolutionary is ETSI NFV architecture? Many of its concepts are key to 5G architecture ETSI NFV s main focus is on management and orchestration aspects that are purely related to virtualized deployments of network functions defined in other forums (e.g. 3GPP) 3/14

4 Initial Thoughts: 3GPP SA2 How revolutionary is 3GPP s SA2 architecture? Protocol and reference points are defined for each NF Have both functional behaviour and interfaces. Can be implemented either as a network element on a dedicated hardware, as a software instance running on a dedicated hardware, or as a virtualized function instantiated on generic hardware Separation of control and user planes Guarantees each plane resources to be scaled independently. Allows UPFs to be deployed separately from control plane functions in a distributed fashion NW Arch w/ Point-to-Point Interface Network Functions New Interfaces AUSF NG13 UDM AMF Access & Mobility Management Function NG10 SMF UDM NG12 NG8 NG10 SMF Session Management Function NG11 AMF SMF NG1 NG2 AMF NG14 NG11 NG4 SMF NG15 NG7 PCF NG5 AF PCF UPF AUSF Policy Control Function User Plane Function Authentication Server Function NG12 NG15 AMF AUSF AMF PCF UDM User Data Management UE (R)AN NG3 UPF NG6 DN AF Application Function NG9 4/14

5 The 5G-MoNArch View EU s 5G-PPP phase 2 project 5G-MoNArch: 5G Mobile Network Architecture for diverse services, use cases, and applications in 5G and beyond Project builds upon key end-to-end architectural concepts of ETSI NFV and 3GPP SA2 using as basis an end-to-end multi-slice system Flexible function decomposition to tackle challenges associated to allocation of NFs to central/edge clouds 5/14

6 Project Key Facts Project runtime: July 2017 June 2019 (24 Months) Leadership team: Coordinator: Nokia Munich (Germany) Technical Management: Universidad Carlos III de Madrid UC3M (Spain) Innovation Management: Deutsche Telekom, Darmstadt / Bonn (Germany) Effort: 7.7M EUR / ca. 750 PM 6/14

7 Project Overview Motivation: 5G architecture: Flexible, adaptable, programmabl e Proof-of-Concept through real-world testbed imple mentations Testbeds: Vertical industry use c ase (smart sea port) Mobile operator deplo yment (touristic city) Approach: 3 enabling innovations, which fill gaps not addres sed in 5GPPP Phase1 2 functional innovation s (one per testbed), com plementing architecture with specific functionality Impact: Commercial potential f or enhanced products and novel services Paving the way for ne w market players 7/14

8 Enabling Innovations 8/14

9 Functional Innovation I: Resilience & Security Innovations underway: Multi-connectivity in virtualised architecture setups with limited computation capabilities, focusing on reliability rather than throughput Network coding techniques tailored for reliability in virtualised network architectures Mechanisms to properly isolate segments of a virtualised environment from network faults and security threats Correlation of network function faults in virtualized environments, identifying root cause Failsafe operation 5G islands: Semi-autonomous operation Efficiency of specialised lightweight cryptographic algorithms when deployed in virtualised network environments 9/14

10 Functional Innovation II: Resource Elasticity Elasticity: ability to gracefully adapt to load changes in an automatic manner such that at each point in time the available resources match the demand as closely and efficiently as possible. Dimensions of elasticity: VNFs, infrastructure, slices, services. Three key contributions of resource elasticity functional innovation: Introduce elasticity at both edge and central cloud taking into account the associated constraints of the cloud infrastructure and the mobile network Consider that in 5G cloud resources are shared by different slices and their availability may change according to the dynamic request of tenants Provide an edge cloud architecture where computational and storage resources can be federated, assigned, and scaled where needed according to the load 10/14

11 Testbeds Barges measurements Smart Sea Port (Hamburg) Traffic control/surveillance Touristic City Applications Traffic light control (cmtc): Traffic lights which are connected through wireless connection; reliable and resilient; data integrity Video surveillance (MBB): Video surveillance required to control entrance to areas, current status of areas, etc Sensor measurements (mmtc); Sensor measurements on barges which must be connect through wireless terminals Focus areas: On-site Live Event Experience by means of VR Immersive and Integrated Media: People will see a part of a touristic city full of real and imaginary people Cooperative Media Production: People will cooperate in real time with imaginary and real people who are feeling the same VR experience. 11/14

12 Additional 5G Architecture Topics Artificial Intelligence (AI) for management and orchestration: Extension of NFV/SDN orchestration principles towards automated network provision and dynamic resource allocation through application of AI-based autonomics Optimisation of network performance for multi-network connectivity, network efficiency, cost per bit, energy consumption, Consolidation of service deployment, policy control, resource management, network monitoring and analysis and prediction under single AI-driven control. Novel UE-centric roles Conventional role constrained to supporting enb/ran operation without decision power New 5G architecture and AI may enable new roles: Slice selection and control UE as part of the mobility management orchestrator UE-centric cells: further enhanced D2D, virtual cells 12/14

13 Conclusions 5G architecture will be the result of the complete merging of the cloud computing and networking worlds Result is a telco cloud that brings together nodes of different nature (edge and core) and enables flexible allocation of NFs to any of the nodes within this cloud. Network slicing paradigm will provide the logical architectural units Whether that is evolutionary or revolutionary is probably just a matter or perspective, but cellular architecture is definitely experiencing quite a few changes 13/14

14 Thank you for your attention! 14/14