C-RAN: moving towards cloudification. Yannan Yuan China Mobile Research Institute Apr. 27, 2017, Beijing, China

Transcription

1 C-RAN: moving towards cloudification Yannan Yuan China Mobile Research Institute Apr. 27, 2017, Beijing, China 1

2 Rethinking RAN Architecture: 5G C-RAN Concept C-RAN concepts : Centralized, Collaborative, Cloud, Clean Radio Access Network Architecture CO CO CO switch switch switch Real-time NFV-based Cloud Center CU part of radio process function L2 and above level collaboration Mixture of GPP and SPP Partial virtualization E2E Orchestrated, natural MEC platform DUs NGFI(xHaul) High reliable next generation front-haul network High capacity, low cost Low latency, low jitter Ideal and non-ideal scenarios DUs DUs Distributed Ranked DUs DU includes extreme real-time functions Small-scale DUs centralized Phy-level collaboration CAPEX saving: Reduction of wireless room leads to CAPEX saving; Share of accessory equipments(gps, power supplier, air-conditioner and etc) OPEX Saving: Reduction of power consumption and rent fee; Cloudification leads to deeper sharing. Radio capacity enhancement: Phy-level CoMP to support JR/JT, L2 and above level collaboration to support 5G feature. Energy-saving and emission-reduction 2 2

3 RAN Virtualization/Cloudification: it is happening now Founding NOC member of ETSI NFV ISG, the one to propose RAN virtualization in NFV WP (2012) NFV Vision NFV Architecture Framework C-RAN Virtualization Field Trial in 2015: Field Trial in TD-LTE macro outdoor BS 18 TD-LTE indoor BSs 1 GSM outdoor BS Area : 0.8km^2, General Server/Switch based BBU pool (with PHY1 accelerators) 3 C-RAN Virtualization field Tsinghua University

4 The Relationship between RAN and Open Source Communities RAN Equipment in Commercial Network NFV-based RAN and Related Open Source Communities Provider A Provider B Provider C 4 Provider D

5 Research Progress of C-RAN in Open Air Interface 1 st ping call with commercial UE in 2014: Collaborated with our partner Keysight, 1 st ping call was successful with commercial UE under 5M TDD OAI, which was deployed on the host. C-RAN branch was created in 2015: 1 st ping call was successful with commercial UE under 20M TDD OAI, which was deployed on the VM 1 st LTE enb live migration prototype, the whole LTE protocol (L1/2/3) VM was successfully migrated without call drop One of the use cases in 5G C-RAN prototype: Performance improvement has been done to meet the requirements of C-RAN prototype. For example, Mini C-RAN/NGFI prototype, NFV-based C-RAN+MEC prototype, etc 5 1 st ping call with commercial UE in 2014 Cloud BBU pool prototype supporting live migration 5

6 China Mobile 5G C-RAN Prototype Demo ( ) , Greener and Softer Network , C-RAN live carrier migration SDAI&SmarTile 2.0, Mini C- (MWC2014) & SmarTile based Invisible BS (MWC2015) RAN/NGFI (MWC2016) SDAI (Multiple Access), Mini C-RAN/MEC (MWCS2016) C-RAN+EC, C-RAN multiple nodes server (MWC 2017) 6

7 Rough plan of C-RAN Wireless Cloud Networks Working Group Objective: Aligning with industry partners to unify the understanding of C-RAN, Driving the industry to enhance the maturity of C- RAN fit for operators requirements. standardize the interface of SW/HW, north-interface of MANO for CU. Preparing to Precommercial PoC and Field trial. Partners: Huawei, ZTE, Ericsson, Nokia, DT, Intel, RedHat, WR, Spirent, BroadCom, Xilinx white paper published and WG start up ~ PoC of Precommercial C-RAN Time schedule Base on the independence of research points, it can be split into 5 working groups: CU basic solution to de - coupling of SW/HW, Orchestration ~ Small-scale Field trial Usecase definition: How to use the C-RAN to meet the diversified demand in 5G, orchestration in RAN? MANO How to generate abstraction of RAN usecases? And which interface should be OPEN? Virtualization layer How to enhance virtualization layer to support RAN? VNF Split and definition What to be orchestrated? Common HW platform What kinds of the HW to be used for C-RAN? 7

8 Summary C-RAN Concept: Centralized, Collaborative, Cloud, Clean Radio Access Network Architecture CU/DU two level architecture Next-generation Fronthaul Interface (NGFI) Cloud RAN, Function Virtualization, Resource Orchestration C-RAN Research Process in OAI 1st ping call with commercial UE in st 20M TDD LTE enb in VM Performance improvement, such as algorithms in the receiver C-RAN Wireless Cloud Networks WG Initiated on November 18, 2016 PoC Dec Field Trials June 2018

9 9 Thank you!