ijoin vision towards 2020 radio access technologies Pre-FIA Workshop, 17/18 March 2014

Transcription

1 EU FP7 Call 8 Project ijoin ijoin: Interworking and JOINt Design of an Open Access and Backhaul Network Architecture for Small Cells based on Cloud Networks ijoin vision towards 2020 radio access technologies Pre-FIA Workshop, 17/18 March 2014 Contact: Albert Banchs, albert.banchs@imdea.org Peter Rost, peter.rost@neclab.eu

2 The ijoin Project Project number: FP Project Coordinator: IMDEA Albert Banchs Technical Management: NEC Peter Rost Funding scheme: STREP Objective 1.1 Duration: 30 months Begin: 01 November 2012 Industry partners 1. NEC (UK) 2. Telecom Italia (IT) 3. Telefonica (ES) 4. Sagemcom (FR) 5. Intel Mobile Communications (FR) 6. HP Italy Innovation Center (IT) Research institutes 7. IMDEA (ES) 8. CEA (FR) Universities 9. University of Bremen (DE) 10. University of Surrey (UK) 11. University of Dresden (DE) 12. Universidad III Carlos de Madrid (ES) (( 2 ))

3 How the Cloud changes the picture C-RAN NFV RAN-Sharing Soft-EPC Wireless SDN SDN Software Defined Radio Virtualisation / Cloudification Mobile Network Radio Access NW Backhaul NW Core NW SaaS PaaS IaaS On-demand Broad access Pooling Elasticity Measured ISP SQL Communication Technology Information Technology (( 3 ))

4 Joint Optimisation of RAN and Backhaul Very dense small cell network Heterogeneous backhaul layer Flexible RAN funct. assign. to cloud Key Concepts LTE Air I/F mmwave Fibre Link Flexible centralisation through (RAN-as-a-Service) Offer RAN functionality as cloud-service Simplified RAN management and flexible smallcell solutions Allow to flexibly shift functions from RAN to cloud Reduce complexity & cost through elastic & flexible function assignment Higher energy-efficiency through computational diversity and higher utilisation Cloud Platform Core Network Joint design and optimisation of RAN and backhaul Interworking of access and backhaul network Optimise for flexible centralisation Optimise backhaul for small cells Consider heterogeneous backhaul network (fibre and wireless) Relax backhaul requirements through dynamic provisioning ( on-demand ) itn enb enb : ijoin Small (( 4 Cell ))

5 UL information flow at enb PHY- PHY+ & MAC Key Concepts: Challenges Assumptions Only commodity HW at data-center Heterogeneous backhaul must be supported If a layer is centralized, anything above is as well 3GPP LTE dependencies must not be violated (timing, etc.) PDCP RLC Priority Handling Multiplexing DL information flow at enb Challenges Degree of centralization Computational complexity of PHY/MAC 3GPP LTE constraints, legacy conformant Impacts on 3GPP RAN Scalability and placement of Flexibility of functional split HARQ FEC Modulation Etc. Interface (( 5 ))

6 Key Concepts: Benefits Hypervisor Interface RAN Computational diversity Exploitation of temporal and spatial traffic fluctuations Efficiently use available resources, scale resource according to needs (resource pooling, elasticity) (( 6 ))

7 Key Concepts: Benefits Hypervisor Interface RAN Localized optimisation Optimisation based on purpose, deployment, Using software implementation rather than configuration (SON) Flexible software assignment over time and space (( 7 ))

8 Key Concepts: Performance Results HP Server System Intel Xeon, 2.2 GHz, 12 cores Vmware ESXi Ubuntu Linux host OS Multi-threaded (user-base) (generic Turbo-decoder and 3GPP LTE MCS with QPSK and 16-QAM) (( 8 ))

9 Summary: Further Information Standards ITU-R Workshop on IMT beyond 5G / ITU-R M.[IMT-VISION] NGMN Further Study on Critical C-RAN Technologies 3GPP, IETF, ONF Peer-reviewed publications Cloud Technologies for Flexible 5G Radio Access Networks, IEEE Communications Magazine, May 2014 Enhancing Performance in Dense Small Cell Networks: Towards Cooperation in the Cloud, IEEE Communications Surveys and Tutorials Benefits and Impact of Cloud Computing no 5G Signal Processing, invited for full submission at IEEE Signal Processing Magazine Software-defined Cloud Architecture Enabling a Diversity of Services in 5G Mobile Networks, submitted to IEEE Communications Magazine, SI Others Youtube channel Summer school in 2015 IWPC workshop (( 9 ))

10 Summary New paradigms in mobile networks Ultra dense heterogeneous networks Cloud computing applied to radio access and core network Programmable networks, e.g. application of Software Defined Networking to mobile networks System-optimization in focus New opportunities Deployment of commodity hardware for RAN processing Mobile communication apps Dedicated purpose deployments and configurations (( 10 ))

11 Thank you for your attention! (( 11 ))

12 Factor of improvement Key enablers to satisfy data demands Small Cells 50% Total cost of ownership (TCO) savings Four-fold increase in density until 2014 Worth about 6.1bln USD until 2014 Small-cells are the option to handle higher rates and to improve energy/cost-efficiency More Spectrum Frequency Division Modulation and Coding Spectrum Reuse 1600 Centralised Processing C-RAN handles inter-cell interference, allows for higher utilisation and to avoid peak-provisioning Up to 50% energy-saving 20%-50% OPEX reduction, 15% CAPEX reduction Requires high capacity and low delay backhaul Centralisation is an option to implement the network but requires more flexibility than today (( 12 ))

13 Executed at BS Centrally executed Key Concepts: RAN as a Service Conventional implementation of LTE Flexible Functional Split C-RAN Implementation (BB-pooling) Netw. Mgmt. Netw. Mgmt. Adm./Cong. Control RRM MAC Example: Partly centralised (inter-cell) RRM Adm./Cong. Control RRM MAC Centrally executed PHY PHY RF Example: Joint Decoding RF Executed at RRH (( 13 ))

14 Software Defined Networking RAN Backhaul Key Concepts: RAN-BH Interworking Flexibly adopt degree of centralisation Apply software based on RAN/BH network information Cloud Platform Core Network Backhaul Differently prioritise user and control plane traffic from RAN Adapt backhaul network based on load changes in RAN RAN Optimise RAN load balancing based on backhaul information Provide feedback for backhaul route setup itn enb enb Challenges Avoiding oscillation Defined standard interfaces (3GPP RAN3/5) (( 14 ))