Coordinated Control and Spectrum Management for 5G Heterogeneous Radio Access Networks

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and coordination solution for 5G RAN Navid Nikaein

1 Coordinated Control and Spectrum Management for 5G Heterogeneous Radio Access Networks COHERENT control and coordination solution for 5G RAN Navid Nikaein Communication System, Eurecom The project is co-funded by

2 Outline 5G Landscape and Challenges Coherent Concept and Architecture RAN slicing Spectrum management Conclusion Demo description 20/06/2017 H2020 COHERENT 2

Management and orchestration 5G landscape visioned by 5G PPP Service orchestration Software network functions logical infrastructure Service layer API Software network service chain layer API

3 Management and orchestration 5G landscape visioned by 5G PPP Service orchestration Software network functions logical infrastructure Service layer API Software network service chain layer API Networking slice layer API Resource abstraction and virtualization layer Physical infrastructure API Softwaredefined mobile controller and ME Flexible function coordinator C App Mobile split & slicing API Edge RAN RAN Cloud VNF VNF RAN PNF 5G radio RAN PNF IoT radio Other radio SDN controlle r API API API SDN API controller Transport network VNF Core network VNF Network cloud Interent Radio access network Transport network 5G network segment Core Network Internet 20/06/2017 3

4 Challenges for Flexible 5G RAN A single architecture to support services with different requirements embb, MTC, URLLC services Services from different verticals Services based on shared infrastructure Different radios, spectrum access modes, frequency bands, and network technologies need to be harmonized under 5G architecture New radio (NR) and legacy RATs 5G spectrum and spectrum sharing Flexible implementation of network functions by NFV/SDN Need for network slicing Native RAN slicing support Performance isolation and resource utilization/multiplexing New control and coordination for 5G networks Efficient coordination in 5G RAN for services and resource utilization Flexible support for RAN functional split Programmability for flexibility and reliability 4

COHERENT Concept Macrocell Picocell Small Small cell cell COHERENT control plane Reconfigure Spectrum Management Spectrum allocation Region 1 BS switch off Global level configuration optimization by

heterogeneous radio access networks Report abstracted network states Region 2 Region 1 Abstracted network graph organized by regions COHERENT Concept Operator s OAM COHERENT Control Framework High

5 COHERENT Concept Macrocell Picocell Small Small cell cell COHERENT control plane Reconfigure Spectrum Management Spectrum allocation Region 1 BS switch off Global level configuration optimization by programmable control framework Logical centralized control and coordination for flexibility and efficiency Network graph and low layer abstraction for scalability and less control overhead 5G heterogeneous radio access networks Report abstracted network states Region 2 Region 1 Abstracted network graph organized by regions COHERENT Concept Operator s OAM COHERENT Control Framework High level coordination Spectrum allocation Control programs Low level coordination Spectrum sharing Flexible spectrum management combined with efficient network coordination Programmability at control plane through API and SDK Cover cellular (LTE, LTE-A), WiFi and beyond OAM: Operations Administration and Maintenance RAT: Radio Access Technology Abstract network model Network virtualization Region 1 RAT1 RAT2... Global network view Radio network abstraction Region 2 RAT1 RAT2... Region 3 RAT1 RAT2... Heterogeneous mobile network 20/06/2017 5

6 Key Considerations for Flexible RAN Architecture Flexibility for control and coordination of radio resources Softwarization and virtualization at RAN SDN concepts for RAN Programmability at RAN Need for efficiency Network-awareness is key to improving system efficiency Different detail of network information and different level of control and coordination Need for intelligent and automation Proactive action control 6

7 COHERENT Architecture RAN Coordination and Programmability Control Separation to Logically Centralized Control and Coordination in C3 Distributed Real-Time Control in RTC Management Plane Operations Administration Management (OAM) Spectrum Manager Core Network /Internet LTE en B NR BS TN C3 Instance Control and Coordination Plane Central Controller & Coordinator (C3) Centralised Network View (CNV) WiF i AP RT C3 Instance Real-Time Controller (RTC) Local Network View (LNV) vrp R- TP vrp R- TP RT TN RT C3 Instance RTC LNV vrp R- TP TN Service Plane Slice X App. M (C3) Slice-specific Network View (SNV) App. 1 (C3) SNV (Custom) App. 1 (RTC) Slice Y App. 2 (C3) SNV App. N (C3) SNV (Regional) App. 2 (RTC) User Plane NBi EWi SBi UP link 7

8 RAN Slicing Considerations RAN sharing vs. RAN slicing RAN slicing within an E2E network slicing EPC and NG-CN Shared vs. dedicated core network CP and UP structure for RAN slicing 3 tier RAN architecture CU, DU, and RRU Functional splits Different deployment scenario DAS, Massive MIMO, indooroutdoor mobility, virtual cells Network slice 2: D2D Network slice 1: Data UE1 MNO network UE2 S/P-GW UE3 Network slice 3: IPTV Network slice 4: Voice UE4 8

RAN slicing Sliceable elementary resources [RRU/Antenna, Fronthaul, CU, DU, Backhaul, CN] [CPU/MEM/NET, Radio resources, spectrum] [configuration, chain, placement] Tardeoff between slice isolation

9 RAN slicing Sliceable elementary resources [RRU/Antenna, Fronthaul, CU, DU, Backhaul, CN] [CPU/MEM/NET, Radio resources, spectrum] [configuration, chain, placement] Tardeoff between slice isolation and resource sharing Dedicate elementary resources to the slice Exploit the statistical multiplexing gain Resource abstraction and network programmability is a key to achieve the required flexibility in slicing 9

10 RAN Slicing Network Graphs Aggregated and hierarchical data structured LTE PHY layer e.g. RSRP, RSRQ, CQI, UL Rx SINR, OTDOA, TA WiFi PHY layer e.g. RSSI, RCPI LTE MAC layer e.g. scheduling parameters like time, frequency, power WiFi MAC layer e.g. Scheduling parameters like time, space, channel quality map Probabilistic metrics Macrocell Small cell Node (vertex) Link (edge) Real network Network graph Channel Quality Link Stats Traffic Matrix 10

11 RAN Slicing Policy Enforcement embb, MTC and URLLC services Dynamic slice resource management Enforce different policies over time OpenAirInterface 1xeNB, 5xUEs, 3xSlices 11

Spectrum sharing in 5G Exclusive use of spectrum License example rules Licensed shared access (LSA) Citizen broadband radio service (CBRS) Pluralistic

12 Spectrum sharing in 5G Exclusive use of spectrum License example rules Licensed shared access (LSA) Citizen broadband radio service (CBRS) Pluralistic licensing License assisted access (LAA) in ISM bands TV white space (TVWS) Co-primary shared access Figure from METIS project D5.4 Future spectrum system concept 12

Spectrum Allocation and Sharing Incumbent of spectrum LSA geo-location database LSA: Licensed Shared Access Operator A Operator B Spectrum Controller Network Management

13 Spectrum Allocation and Sharing Incumbent of spectrum LSA geo-location database LSA: Licensed Shared Access Operator A Operator B Spectrum Controller Network Management (O&M) Spectrum Controller Network Management (O&M) COHERENT RAN Controller COHERENT RAN Controller Operator A Band Operator B Band LSA Band Operator A Operator B H2020 COHERENT 13

14 Architecture consideration on spectrum management Flexible Spectrum Management Cognitive Engine Spectrum Reasoning Learning & Optimization Control and Coordination Plane Knowledge Base Operator DB Spectrum Sharing DB Policy DB Interference DB NBI Rules from other operators agreements LSA, LAA, SAS, TVWS, PL Applicable policies: national (Temporal, cross-boarder) Measurements metrics (PHY, MAC, etc.) Long term scale Short term scale RRM Logical Centralized Controller and and Coordinator with with Network View SBI EBI User Plane 5G NR LTE WiFi 14

Topology (T) graph: geographic relationship of operators cells regarding spectrum

15 Spectrum graphs Leverage network graph to manage spectrum sharing Policy (P) graph: sharing agreement/policy between operators (CoP: CoPrimary, LSA: licensed shared access) Topology (T) graph: geographic relationship of operators cells regarding spectrum sharing Combined (P+T) graphs Operator Cell A1 of operator A Spectrum sharing using P and T graphs 15

16 Conclusion COHERENT delivers a uniform control and coordination framework for multiple RATs control scalability, flexibility and programmability at RAN to meet the 5G service requirements Key features Network abstraction and RAN programmability Agile control and coordination framework Support for network slicing 16

Joint demo with Coherent project: FlexCRAN: Flexible

on OpenAirInterface and Mosaic-5G FlexRAN platforms

for C-RAN deployment in 5G Benefits: Functional split and

networks as well as the feasibility of Ethernet-based

17 Joint demo with Coherent project: FlexCRAN: Flexible Cloud-RAN Platform Short description of PoC: Built based on OpenAirInterface and Mosaic-5G FlexRAN platforms Demonstrates a flexible RRU/DU/CU architectural framework for C-RAN deployment in 5G Benefits: Functional split and compression on the performance of the Fronthaul/midhaul networks as well as the feasibility of Ethernet-based fronthaul/midhaul. Programmability in RAN to enable RAN sharing use-case.

Poland EURECOM, France SISC, Sweden CommAgility, UK 4GCelleX, Israel Fairspectrum,

18 Thank You! VTT, Finland (Coordinator) Aalto University, Finland THALES, France OTE, Greece INEA, Poland EURECOM, France SISC, Sweden CommAgility, UK 4GCelleX, Israel Fairspectrum, Finland CREATE-NET, Italy EICT, Germany University of Duisburg Essen, Germany Poznan University of Technology, Poland Travelping, Germany Project website:

Coordinating Heterogeneous Mobile Networks in 5G

Coordinated Control and Spectrum Management for 5G Heterogeneous Radio Access Networks Coordinating Heterogeneous Mobile Networks in 5G Dr. Alexandros Kostopoulos Research Programs Section, Fixed Research