Dynamic spectrum allocation and energy efficiency in 5G systems. The SPEED-5G perspective

Transcription

1 Dynamic spectrum allocation and energy efficiency in 5G systems The SPEED-5G perspective CLEEN , , Grenoble Benoit MISCOPEIN CEA-Leti on behalf of the H2020/SPEED-5G consortium

2 Outline EE as a key pillar in 5G systems Heterogeneous Networks Slicing Network programmability Virtualization of resources SPEED-5G quick overview SPEED-5G original technical contributions edsa definition Heterogeneous architecture proposal Multi-RAT capable system RRM enhancements type of meeting, date, location 2

3 Energy Efficiency as a key 5G architecture pillar Joint optimization of Spectral Efficiency and Energy Efficiency is a key pillar of future 5G network deployments SPEED-5G is addressing this challange by: using in a novel way already existing concepts: Heterogeneous Networks Slicing Network programmability Virtualization of resources providing original contribution on: Optimization of Radio Resource Management (RRM) procedures Introduction of the Extended Dynamic Spectrum Allocation (edsa) concept 3

4 Network slicing architecture and SPEED-5G use cases Programmability The network slicing concept: enables one operator to deploy, on demand, multiple logical instantiations of its physical network, each one isolated and fully dedicated to a specific service leads to high resource utilization efficiency, scalability and adaptability since each slide is designed and managed to dynamically provide the required level of resources ---> see the right side of the picture Business Applications Small Cell Edge Orchestrator Massive IoT Slice Consumers Enterprise Verticals 3 rd party NFV Business Enablers RAT Waveform Band Functional Split Network Resources Small Cells SDN SDR Mission Critical Slice Mobile BroadBand Slice edsa 4

5 Network programmability and virtualization of the resources Programmability The network programmability paradigm makes the following concepts interact : NFV (Network Function Virtualization): separating network functions from the hardware they run on SDN (SW Defined Network): decoupling the control-plane from the data-plane so to instantiate and configure network elements in the most appropriate way SDR (SW Defined Radio): providing in the most flexible way the different blocks composing a RAT access stratum (MAC, RLC, RRM, PHY, etc) ---> see the central part of the picture Business Applications Small Cell Edge Orchestrator Massive IoT Slice Consumers Enterprise Verticals 3 rd party NFV Business Enablers RAT Waveform Band Functional Split Network Resources Small Cells SDN SDR Mission Critical Slice Mobile BroadBand Slice edsa 5

6 SPEED-5G Overview The main objective of SPEED-5G is to achieve a significantly better exploitation of heterogeneous wireless technologies, providing higher capacity together with the ultra-densification of cellular technology, and effectively supporting the new 5G Quality of Experience (QoE) requirements. In SPEED-5G we will develop new techniques for optimizing spectrum utilization, following three main dimensions: Ultra-densification through small cells, additional (shared) spectrum, exploitation of available resources across technologies In SPEED-5G this three dimensional model is referred to as edsa, where several spectrum bands, cells and technologies are jointly managed in order to offer improved QoE and a tremendous capacity increase in a cost-efficient manner. Project Coordinator: Sistelbanda Partners: Eurescom, BT, CEA-Leti, Intel Deutschland GmbH, Intracom Telecom, Instituto de Telecomunicações, Rohde & Schwarz, University of Surrey, WINGS ICT Solutions More information at: Contact: SPEED-5G-Contact@5g-ppp.eu

7 SPEED-5G research focus areas SPEED-5G targets providing solutions at Layer 2, Layer 3 and above to enable edsa with multiple RATs, and especially with FBMC, a non orthogonal multicarrier waveform. SPEED-5G doesn t work on physical layer design but provides the enablers for using in a coordinated way licensed, lightly-licensed and unlicensed spectrum mostly in dense and ultra-dense small cell networks. A new MAC for the 5G will be developed and evaluated throughout different use cases and scenarios New RRM mechanisms will be explored in order to enhance and enable a real Dynamic Spectrum Access using in a well defined set of Use Cases and scenarios mainly from 3GPP and METIS

8 What is edsa about? Capacity enhancement by means of selecting or aggregating different RATs on various spectrum license regimes Licensed, unlicensed (mainly 5 GHz) and lightly licensed spectrum; examples for lightly licensed: TVWS or LSA bands (2.3 GHz, 3.5 GHz) Examples of key edsa use-cases Capacity improvement with a supplemental carrier on non-licensed spectrum using any RAT (extended LAA) Interference reduction on a group of small cells by offloading traffic on non-licensed spectrum (coordinated or autonomous manner) These use-cases rely on the ability to dynamically select a suitable channel in a list of candidates, depending on the traffic type and interference context (cognitive radio concept) type of meeting, date, location 8

9 Main SPEED-5G achievements Traffic scenarios edsa use-cases Logical architecture Multi-RAT capable MAC block diagram FBMC MAC design in unlicensed spectrum Decentralised MAC for UDN networks RRM block diagram Interface between MAC and RRM (in progress) type of meeting, date, location 9

10 SPEED-5G logical architecture SPEED-5G Edge Cloud Architecture dson agent Edge Spectrum Manager Orchestrator 5G OAM Incumbent LSA Repository National Regulator 5G Small Cell dson agent 5G Small Cell F-Plane C-Plane GW crrm Cooperative Sensing GW F-Plane GW Local GW IoT GW F-Plane C-Plane ex2 KPI Collector C Plane Edge Services Forwarding Plane C-Plane F-Plane F-Plane C-Plane F-Plane ex2 INTERNET Sensing Reasoning LSA Controller 5G Core Network (Operator 2) 5G Core Network (Operator 1) C-Plane Operator s Macro 5G RAN Radio Coverage Map INTERNET Deployment of edge gateways (both in C and F-Plane) to geographically distribute resource control and access to service content crrm deals with resource allocation, inter-cell cooperation ; it is linked to spectrum management aspects for operating in shared spectrum bands crrm is responsible of addressing the high SINR level by using smart interference management techniques, linked to distributed protocol in small cells.

11 Multi-RAT capable system Because edsa requires opportunistic operation on various license regimes, Interworking multi-rats MAC and RRM frameworks have been defined Data Flow Control Flow RRC/RRM/OAM RLC C-Plane Interface crrm Coordination Interface MAC CMAC SAP MAC SAP Multi-Path TCP GTP Control Edge Cloud 5G Small Cells Cell Control GTP PDCP RLC MAC SCH #1 SCH #2 SCH #2 PHY #1 PHY #2 PHY #n Cell Control GTP PDCP 5G-RLC MAC SCH #1 SCH #2 SCH #2 PHY #1 PHY #2 PHY #n MAC Manager Configuration Cell Configuration UE Configuration Scheduler Configuration CSCHED SAP CMAC SAP KPI Collector SCHED SAP SCHED SAP Scheduler RAT n QoS HARQ ReTx Tx Algorithms Time Allocation Freq Allocation Sensed Data CSCHED SAP CMAC SAP SCHED SAP Subframe RAT n (De)Multiplex (Dis)assembly PHY SAP PHY PHY SAP

12 SPEED-5G RM block diagram

13 SPEED-5G RRM vision The proposed solutions will leverage the advantage of flexible waveforms and interference management schemes by using: Dynamic Channel Selection Channel Segregation techniques Load balancing among a group of neighboring cells/small cells Co-locating WiFi access points, sharing site-lease agreements and backhaul f i : Different frequencies in a multi-rat environment

14 SPPED-5G RRM and EE RRM enablers envisaged to support different types of wireless services and use cases through non-continuous spectrum aggregation and multi-rat technologies Traditional RRM were mainly seeking spectrum efficiency and QoS RRM could also play an important role in reducing energy consumption and thus improve the whole system resource and energy efficiency Means for achieving resource/energy efficiency: Transmission power control scheme Base station sleep process Boost of Capacity/Throughput (by transmitting more data in shorter period of time enabling for example sleep mode) Reduce the interference level and packet drops (due to less retransmissions hence less energy consumed for transmission)

15 Conclusion, future works Speed-5G project deals with the capacity improvement of 5G ultra dense heterogeneous networks, developing the novel concept of edsa edsa is about relying on new spectrum resource with various license regimes so that new operation modes of RATs could be used to improve the capacity either by aggregating carriers and/or by managing the interference The logical architecture relies on a slice-based virtualised edge architecture able to cope with centralised management of resources and a (distributed) multi-rat MAC protocol This proposal is designed to allow for many optimisations: resource and spectrum utilisation, capacity maximisation, interference management Energy efficiency is a criterion this architecture is able to play on Performance evaluations will start soon, based on realistic scenarios (virtual office, outdoor hotspot, extended sub-urban) implying a representative mix of traffic

16 Thank you for your attention! Find us at Acknowledgment: The research conducted by Speed-5G receives funding from the European Commission H2020 programme under Grant Agreement N : The European Commission has no responsibility for the content of this presentation. type of meeting, date, location 16