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

    Yannan Yuan

    China Mobile Research Institute Apr. 27, 2017, Beijing, China

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    RRU

    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

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    CU @ CO CU @ CO CU @ CO

    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 switch switch

    High reliable next generation front-haul network High capacity, low cost

    Low latency, low jitter

    Ideal and non-ideal scenarios

    Distributed Ranked DUs DU includes extreme real-time functions

    Small-scale DUs centralized

    Phy-level collaboration

    C-RAN concepts : Centralized, Collaborative, Cloud, Clean Radio Access Network Architecture

    NGFI(xHaul)

    DUs

    DUs

    DUs

    Rethinking RAN Architecture: 5G C-RAN Concept

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    RAN Virtualization/Cloudification: it is happening now

    C-RAN Virtualization field testbed

    @ Tsinghua University

    C-RAN Virtualization Field Trial in 2015: 1 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)

    Field Trial in 2015

    Founding NOC member of ETSI NFV ISG, the one to propose RAN virtualization in NFV WP (2012)

    NFV Vision NFV Architecture Framework

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    The Relationship between RAN and Open Source Communities

    Provider A

    Provider B

    Provider C

    Provider D

    RAN Equipment in Commercial Network

    NFV-based RAN and Related Open Source Communities

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    Research Progress of C-RAN in Open Air Interface

    1st ping call with commercial UE in 2014: Collaborated with our partner Keysight, 1st ping call was successful with commercial

    UE under 5M TDD OAI, which was deployed on the host.

    C-RAN branch was created in 2015:

    1st ping call was successful with commercial UE under 20M TDD OAI, which was deployed on the VM

    1st 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

    1st ping call with commercial UE in 2014 Cloud BBU pool prototype supporting live migration

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    China Mobile 5G C-RAN Prototype Demo (2014-2017) 2014.2, Greener and Softer Network 2015.3, C-RAN live carrier migration

    & SmarTile based Invisible BS 2016.2 SDAI&SmarTile 2.0, Mini C-

    RAN/NGFI

    2016.6 SDAI (Multiple Access), Mini C-RAN/MEC

    (MWC2014) (MWC2015) (MWC2016)

    (MWCS2016) 2017.3 C-RAN+EC, C-RAN multiple nodes server

    (MWC 2017)

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    Base on the independence of research points, it can be split into 5 working groups:

    Usecase definition: How to use the C-RAN to meet the diversified demand in 5G, orchestration in RAN?

    Time schedule 2016.11 white paper published and WG start up

    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 Pre-

    commercial PoC and Field trial.

    Partners: Huawei, ZTE, Ericsson, Nokia, DT, Intel, RedHat, WR, Spirent, BroadCom, Xilinx.

    2018.6~ Small-scale Field trial 2017.6 CU basic solution to de -

    coupling of SW/HW, Orchestration

    MANO

    How to generate abstraction

    of RAN usecases? And

    which interface should be

    OPEN?

    Virtualization layer

    How to enhance virtualization

    layer to support RAN?

    1

    VNF Split and definition

    What to be orchestrated? 2

    Common HW platform

    What kinds of the HW to

    be used for C-RAN? 3

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    2017.12~2018.6 PoC of Pre-

    commercial C-RAN

    Rough plan of C-RAN Wireless Cloud Networks Working Group

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    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 2014

    1st 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. 2017

    Field Trials June 2018

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    Thank you! [email protected]