Future Broadband Network Virtualization Cloud Central Office

Transcription

1 Future Broadband Network ization Cloud Central Office

2 Contents Challenges of current rigid network and transformation towards Cloud-centric network The High-level Cloud CO architecture Huawei s understanding on Cloud CO components PNF network abstraction, slicing and centralized control for multi-access, multi-tenancy and e2e underlay network diversity and use cases Overlay networking and I/O technologies in NFVI Domain abstraction, autonomy and assurance Open Ecosystem Huawei Vision Summary Huawei Technologies Co., Ltd. 2

3 Challenges of Service Provider Linear growth of CAPEX&OPEX with expansion of network Slow response for service requirements and long Coupling between Service and Network Root Causes Device-centric & Manual Operations with fragmented networks TTM for new services Low utilization and efficiency of network resources Invisible & complaint-driven user experience mgmt. Skill dependent troubleshooting Mobile Small CO (~thousands) CSG Medium CO (~Hundreds) RSG Large CO (~dozens) IMS Hyper-scale Cloud Enterprise CPE PE EPC Consumer ONT OLT BNG CR Internet Access Metro BackBone Huawei Technologies Co., Ltd. 3

4 Network & Service Decoupling Brings Huge Benefits to OTT ~ 3000 devices / person in Hyper-scale DC ~ 4 hours OTT New Service Provisioning CAPEX 10% Traffic Double Growth Data Center Network ~ 100 Devices / person in Telco-S network ~ 28 weeks Private Line Service Provisioning CAPEX 60% Traffic Double Growth Metro Network WEB WEB FW APP DB Service Service Functions BRAS PE Network VS ASG SR Transport Functions B2C B2H B2B Network & Service Decoupling, network is service agnostic Spine/Leaf Arch.,elastic scale out,any to any non-blocking Simplified protocols, reduce O&M experience requirements Automatic service provisioning, O&M visualization Network & Service coupling into dedicated HW, difficult to scale out Network change with service, difficult to scale up independently 30+ protocols, high experience requirement Low efficiency by Manual O&M, 80% fault via configuration errors Huawei Technologies Co., Ltd. 4

5 Advantage and Opportunity of Service Provider App App App App App App vcpe vpe vbng vims vepc Overlay Network and Distributed IAAS Mobile Small CO (~thousands) CSG Medium CO (~Hundreds) RSG Large CO (~dozens) IMS Hyper-scale Cloud Enterprise CPE PE EPC Consumer ONT OLT BNG CR Internet Access Metro BackBone <10ms <20ms <50ms nondeterministic Physical infrastructure close to users is the operator's greatest advantage and assets More and more services need delay and bandwidth guarantee to enhance their experience and quality Building an open telecom cloud based on CO is the biggest opportunity for operators Telecom Cloud first considers network services, and then opens up and builds a telecommunication cloud IAAS. What are the characteristics of such a telecom cloud? What kind of architecture and design considerations are needed? Huawei Technologies Co., Ltd. 5

6 CloudCO Architecture SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator Domain Orchestrator MCO Engine NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt PNF Network VNF PNF VNF VNFM NFVI Compute Storage ization Layer Network VIM From BBF TR384 Compute Storage Network NFVI Network Huawei Technologies Co., Ltd. 6

7 CloudCO -- PNF Network SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator MCO Engine NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt PNF Network PNF VNF VNFM NFVI Compute Storage ization Layer Network Compute Storage Network VIM From BBF TR384 Huawei Technologies Co., Ltd. 7

8 PNF Network Understanding PNF SDN Mngt PNF Cloud CO POP Cloud CO CORE PNF SDN Mngt ONT CPE CPE CSG DPU OLT OLT Access CO PE/LSW Metro CO P/LSW PE Metro CO PE/BNG-U Access Metro BackBone PE/CR Focus on PNF SDN network automation, No only devices within CO Huawei Technologies Co., Ltd. 8

9 Broadband Access Abstraction enabling NaaD (Network as a Device) and OPEX reduction ONT CO ADSL: m FTTC VDSL/Vectoring:~1 FTTB VDSL/Vectoring/G.fast: ~500M@100~300m FTTD G.fast:~1 IoT Fibre CSG van 1 OLT PNF SDN Mngt van vccap... AN View ADSL: Sites 1 VDSL/Vectoring: ~100M@300~500 m VDSL/Vectoring/G.fast: ~500M@100~300m Sites 10 Sites 100 G.fast: ~1G@10 0m Sites G FTTDp DSL Cable DPU van 2 CMC vccap BAA ONT CMC DPU OLT Physical Access Device View DIstributed CCAP Access Network Evolution Challenges: Management Complexity Multi-Access media: DSL, PON, Active ETH, HFC etc. Multi-Access devices: DPU, ONU, OLT, CMC,CMTS/CCAP, CPE, Access Router, and etc. Migration Difficulty How to migration from VDSL->Vector->G.fast->FTTH Proposed Solution: M & C plane centralized to SDAN controller through BAA without impacts on OSS Applications running on top of BAA: van, vccap, vcpe, vcdn, vqam Huawei Technologies Co., Ltd. 9

10 BAA enabling network slicing and new business model ONU 1 Unbundling/Bit stream Physical Deployment NaaS SP s logical network view Wholesaler Retailer OLT network 1 VNO1 ONU slice 1 n OLT slice 1 network n VNO k ONU n ONU slice k nk OLT slice k open API Current Wholesale Pipe wholesaling Only BW different, but services similar Fixed network planning Network as a Service Multi-tenancy with virtual network Self-defined services for different tenant s network Network planning on demand Huawei Technologies Co., Ltd. 10

11 SDN-PNF : Centralized Control E2E Underlay Network CPE ONT Small CO (~thousands) CSG OLT Medium CO (~Hundreds) vpe vbng vims Large CO (~dozens) vepc SDN Controller Overlay Network and Distributed IAAS Metro and Backbone Physical Underlay Network VLL VPLSQinQ GRE BGP RSVP-TE BGP LDP L3VPN VLL EVPN VPLS L3VPN Segment Routing Tunnel: RSVP-TE/LDP/GRE/L2TPv3/PPTP -> SR VPN: VLL/VPLS/L3VPN -> EVPN >10 complex protocols >6000 command line, manual O&M MPLS Solution SR/EVPN Solution 10+ Protocols -> 2 Protocols E2E seamless automatic provisioning & path optimization >28 weeks provisioning period with section by section configuration Provisioning period week->hour SRv6 for IPv6-oriented evolution Huawei Technologies Co., Ltd. 11

12 CloudCO -- VNF SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator MCO Engine NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt VNF PNF VNF VNFM NFVI Compute Storage ization Layer Network Compute Storage Network VIM From BBF TR384 Huawei Technologies Co., Ltd. 12

13 Use Case- IMS & EPC Cloud for all functions in Core 2/3/4/5 G MANO Cloud EPC Cloud IMS Other VNF NFVO Wi-Fi Access & Metro Cloud OS VNFM NB-IoT Ntwk DC1 DC2 VIM Unlicensed NFV has been adopted in Wireless CN first: 1 IMS and other network functions rely on high computing capability and is easy to transform from dedicated HW to software based-on COTS server 2 Major VNF are deal with session, same as IT application and relatively easy stateless transformation, EPC is different. 3 Rich service with frequent change 4 High Ntwk layer location, and easy to get the scale effect 5 Commercially available Huawei Technologies Co., Ltd. 13

14 Use Case-2B Enterprise Sites CloudCO CloudCO Enterprise Sites CPE Overlay VPN VPN- GW vfw vnat vfw vnat VPN- GW Overlay VPN CPE CPE CPE Cloud OS Cloud OS DC DC CPE CPE Lease Line Lease Line AN&Metro or Barer Ntwk Telco 2B services: Main feature: 1 High ARPU 2 BW high per user but total BW is much less than residential 3 High QoS compared with residential Challenge: 1 Provisioning too long(about 28 weeks) 2 Not cover all sites of enterprise by one Telco Solution: 1 Deploy VPN-GW at CO/POP to provide VPN services, connect and coexist with underlay VPN such as MPLS 2 ize VPN GW is FW VNF and totally different with IT appl: 1)extremely high forwarding performance 2)Pass-through traffic, SA and DA not in DC. VNF is not endpoint and require many routes outside DC 3)Routing and Forwarding consistent and reliability Huawei Technologies Co., Ltd. 14

15 Use Case-2C vbng Traditional Architecture EMS Huge Amount Subscribers, Ultra High Bandwidth, But Low ARPU DHCP Cloudified Architecture EMS DHCP Centralized Control Cloud Improve control plane performance & scalability, solve CP resource problem. Sharing control plane resource with multiple UPs, improve efficiency. Centralized service provision point to a single CP, simplify O&M. BNG-CP CloudCO BNG-UP High performance User Plane Ultra high bandwidth but low ARPU, Dedicated Hardware vs VNF. Reuse existing BNG hardware, protect investment BRAS BRAS BRAS BRAS X86 Servers Dedicated Hardware Huawei Technologies Co., Ltd. 15

16 Use Case-2C vrg How to raise ARPU of residential service Cloud CO Cache MCA VAS NFVI Security vrg Policy Route SLA Network OTT 3 rd party Cloud BNG-U Internet Service Best Effort Network vrg : Anchor Point for Residential Value Add Service Enrich service for residential customers to increate ARPU Traffic dispatch on service demand & policy to improve experience Open environment for integrate 3 rd party Application. Centralized management, control and analysis to simplify O&M Container based vrg-c vrg-c vrg-c vrg-c Metro OLT Challenges Business: cost sensitive, trivial requirements, killer app? Technical: 1000s containers within one server, lifecycle management & HA based vrg-u ONT (prg) Kids IOTs Parent Huawei Technologies Co., Ltd. 16

17 Use Case-More CloudCO vcdn vstb IOT vgw vbng vrg NFVI 5G AR/VR V2X Huawei Technologies Co., Ltd. 17

18 VNF\ Diversity Differences in service features of VNF processing: 1 Management/control/signaling services: The VNF acts as an Endpoint. 2 Traffic forwarding type service: VNFs process pass-through traffic, forwarding will consume a lot of computing resource VNF/ Payload Payload VNF/ VNF/ Payload Endpoint Endpoint Different types of based on the service features: 1 processing management/control/signaling 2 processing traffic forwarding services 3 simultaneously processing both management/control/signaling and traffic forwarding services vims vepc VPN-GW vbng-c vbng-u VRG Endpoint Type Forwarding type Y Y Y Y - Y - Y Y - Y Y Hybrid type VNF Endpoint Type Endpoint Type Forwarding type Forwarding type Hybrid type Hybrid type Different types of have different requirements on NFVI Huawei Technologies Co., Ltd. 18

19 CloudCO NFVI Network SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator MCO Engine NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt PNF VNF VNFM NFVI Compute Storage ization Layer Network VIM From BBF TR384 Compute Storage Network NFVI Network Huawei Technologies Co., Ltd. 19

20 Different I/O technologies for s Host OS vswitch(dvr) Host OS SR-IOV Host OS vswitch NIC NIC Smart NIC DCN Fabric Throughput Mobility Standardization Route coupling Applicable vswitch Low(<10Gbps) High High Y Endpoint Type SR-IOV High(10-100Gbps) Low High N Traffic forwarding type SmartNIC High(10-100Gbps) High Low Y Endpoint Type? The same VNF is often composed of Endpoint-type, traffic-forwarding. NFVI must support both vswitch and SR-IOV. The Smart NIC is the direction of the forwarding function offload in the future. It mainly offload vswitch. Is it possible to offload VNF functions in the future? Huawei Technologies Co., Ltd. 20

21 NFVI Overlay Networking---VXLAN vswitch DCN Fabric (IP) VXLAN vswitch vswitch-based VXLAN networking: 1 Overlay and underlay (DCN network) completely decoupled, VNF / can be dynamically migrated (IP unchanged) 2 Suitable for Endpoint type : vswitch only needs to handle the routing of TOR DCN Fabric SDN Controller VXLAN TOR TOR-based VXLAN networking : 1 Relatively higher performance than vswitch, but coupled with DCN network, dynamic migration requires DCN network cooperation 2 Suitable for Endpoint type : TOR only needs to handle the routing of SDN Controller DCN Fabric (IP) VXLAN VNF-based VXLAN networking : 1 The overlay is fully decoupled from the underlay (DCN network) forwarding, but the dynamic migration of requires publishing the VTEP address to the DCN network. 2 Suitable for forwarding for high forwarding performance SDN Controller Hybrid Mode vswitch DCN Fabric TOR Applicable to different scenarios Unified SDN Controller Manages VXLAN Network Huawei Technologies Co., Ltd. 21

22 Deployment environment for : & Container Currently is mainly deployed based on s. s can meet the needs of most VNFs. Future will be deployed based on a mixed environment of s and Containers. Coexistence of s and Containers should be supported. Partial Endpoint type VNF may evolve to pure Container deployment NFVI VIM needs to support unified management of s and Containers VIM (OPS) VIM (OPS + K8S) VNF VNF Container Container VNF VNF Container Container Container Container Container Huawei Technologies Co., Ltd. 22

23 CloudCO Domain Orchestration SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator MCO Engine Domain Orchestration NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt PNF VNF VNFM NFVI Compute Storage ization Layer Network Compute Storage Network VIM From BBF TR384 Huawei Technologies Co., Ltd. 23

24 Domain Abstraction Reduce Integration Complexity NG OSS NG OSS(e.g.SDN Controller) Model-Driven Service Model E2e SO 1 Good Model layering eases CloudCO and OSS integration Vendor specific Model and interface Abstract network Service model and state-independent interface NB API:~20 Vendor1 PNF/VNF Vendor k PNF/VNF Multi-vendor Interoperability challenge Solution: 1. Management and control plane layering: decouple operator OSS and vendor specific domain controller, S-VNFM and interface; 2 Model layering: decouple service model, network model and vendor specific model Vendor specific Model and interface PNF Controller PNF CloudCO Domain Orchestrator VNF Controller VNF DC Controller SB API:~100 S-VNFM 2 Complexity hiding via CloudCO Domain abstraction: 1 simplify interoperability issue between CloudCO and OSS; 2 unaware of domain product change or upgrade; NFVI VIM Cloud CO Domain Huawei Technologies Co., Ltd. 24

25 CloudCO Assurance & Analyzer SDN Management & Control End-to-End Service Orchestration /OSS/BSS/Portals (Assurance, ) (#) CloudCO North Bound API(s) CloudCO Domain Orchestrator MCO Engine NFVO CloudCO Domain EMS (#) PNF SDN Mngt VNF SDN Mngt DC SDN Mngt Assurance & Analyzer PNF VNF VNFM NFVI Compute Storage ization Layer Network Compute Storage Network VIM From BBF TR384 Huawei Technologies Co., Ltd. 25

26 Challenge for Assurance of CloudCO Network Root Cause Classfication of Service Fault in DC Configuration Error of Network(43%) Bug of HW/SW(20%) Abnormal of IT Infrastructure(30%) Resource Exhaustion(7%) Issues of service&experience perspective Connectivity(70%): Interrupt of service Performance(20%): Bad experience of service Policy(10%): Abnormal service access Abnormal Traffic: 3.65% 30% Aware via traditional approaches 70% Unaware via traditional approaches Data from some real typical medium DC(5300+, 65 subnet) Average number of flow:96,545,774/day,among them 3,543,230(3.67%) are abnormal Lack of data for fault cause analysis Not coverage completely from chipset, device, network, IT infrastructure, flow and applications Low sampling frequency, min -> ms; Lack of historic data, >90% does not support fault playback Unaware of abnormal application and network status, majority faults are detected passively Lack of capability to correlate the issues between network and applications Capability to predictive resource exhaustion(<7%), bugs of HW/SW(<20%), configuration error(<43%) Huawei Technologies Co., Ltd. 26

27 Data Analyzer improve the assurance of Central CO Data Analyzer Imagine You Can Know Everything about Your Fabric Behavior Fabric State Database Fabric real-time status and behavior model Flow State Database App flow, real-time status, and behavior model Context Data Chipset, Device, Path, and Flow Polling-based, focus on device status Telemetry-based, focus on realtime fabric status Static topology-based, focus on device links Dynamic path-based, focus on app flows Traditional Afterward event-driven App-oriented black box network, focus on management plane Transparent network, focus on actual forwarding plane Data Analyzer Real-time data-driven Huawei Technologies Co., Ltd. 27

28 Key Capability of Data Analyzer Precise playback of historical faults and retrieval of ten billion data records within seconds Actual network quality assessment and proactive risk prediction Search Verification! Searches tens of billions of data records per second Processes millions of flows per second Visualizes the network in multiple dimensions for precise history review Correlation Mutual visibility between applications and networks, facilitating minute-level fault locating Evaluates the network SLA based on true flows across the entire network Identifies and analyzes abnormal network flows Associates apps with network paths to enable quick issue demarcation Evaluates network strategies through application dependency mapping (ADM) Huawei Technologies Co., Ltd. 28

29 Introducing Data Analyzer to close loop Central CO Self-help Portal Service synergist / OSS Applications Intent-based API Unified Web Portal Intent Engine Open API Gateway Intelligence Engine Data-driven Insights Intent-driven Automation Service Agility Improves 90% Intent-based APIs reduce complexity E2E Automation for Hybrid Network Optimization Advice Manager Controller Network Automation Network Info. BigData/AI Data Analyzer Big-data based Analytics 60% Issue Predictable Real time network state awareness Algorithm-based Netconf /YANG Cloud Native Platform Real-time Telemetry Context /Telemetry issues/risks/threats detection for Predictive Maintenance Network Infrastructure Huawei Technologies Co., Ltd. 29

30 Open Ecosystem Standard Organization Co-operation Open Source Community Network Architecture Protocol & Model Cloud CO Linux Foundation Networking Fund Huawei Technologies Co., Ltd. 30

31 Huawei Vision : IDN Bridges Business Intent and Networks Business Logic/Policy Intent Network-centric Fragmented Digital Twin Intent Engine Intelligence Engine User-centric Closed-loop Reactive Automation Engine Analytics Engine Predictive Skill-dependent Intent-driven automation Predictive maintenance AI/Automation Real-time awareness Network Infrastructure Huawei Technologies Co., Ltd. 31

32 Summary In Cloud-centric, 5G and IoT era, operators are facing challenges of current network and transformation towards Cloud-centric network. The Cloud CO architecture is the cornerstone of NG broadband network to enable network & service decoupling, SDN, NFV and cloud technologies in order to address multi-access, multi-tenant and fast service innovation, with various of flexible network modes. We present Huawei s understandings, experiences and learnings from the executive projects in the scenarios of access, metro network, overlay VPN and NFVI. The details of network abstraction, slicing and centralized control, diversity and use cases, overlay networking and I/O technologies in NFVI, domain orchestration and enhanced assurance based on data analysis will be discussed. Open ecosystem and Huawei vision are shared. Huawei Technologies Co., Ltd. 32

33 Thank You. Copyright 2017 Huawei Technologies Co., Ltd. All Rights Reserved. The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.