Verizon PON Deployment and the Strategy for PON Evolution Denis A. Khotimsky Verizon Network Planning Osaka, Japan June 15, 2018
FiOS Deployed BPON (2004) and GPON (2008) Services include POTS, Data and Video (QAM), Business Ethernet Symmetrical Speeds up to 750mbps, GigaBit Connection Strategy: Fiber all the way to the Home/Living Unit Small percentage of MTUs use VDSL1/2 but these are being replaced with SFUs Use PON for both Residential and Business (Ethernet) Services 2
Verizon Access Evolution 40G 20G 10G 1G 50M 2004 BPON Limited to < 100 Mbps 2008 GPON Deployed for < 1 Gbps 2017 Skip XG-PON XGS-PON Up to 8.5 G 2018 NG-PON2 Up to 10 Gbps/Sub Trialed in 10/2.5 2015 by Verizon Enabled by Novel Tunable Lasers Smoother path to higher speeds (40G/40G) 100M 2.5G 10G 20G 40G Downstream 3
PON-based access NG-PON2 third generation of PON systems in Verizon BPON suppliers: Tellabs, Motorola (Arris) GPON suppliers: Alcatel-Lucent (Nokia), Motorola (Arris) NGPON2 deployment commencing in 2018: Calix, ADTRAN 4
Strategic Vision: Intelligent Edge Network Objective? Drive a lower cost infrastructure through Next Generation technologies and network topology simplification Create service differentiation through fast delivery of usage-based services How? Leverage NG-PON2 among other Next Gen Technologies Design a simplified and common network architecture across Verizon Deliver unified domains between Access, Transport, Edge, and Core Create OSS/SDN/NFV foundation to support more dynamic and application-based services enabling network automation with end-to-end network management capabilities 5
NG-PON2-based Access Strategy Present OLT GPON ONT ROADM GWR Residential OLT BPON ONT Business Incorporating Subs Mgmt (BNG) Simplifying the Network Intelligent Edge Network with NGPON2 Next Gen Metro Transport L0 L1 L2 Switch OLT OLT Local Caching Access Aggregation Residential and Business NGPON2 NGPON2 ONT Customer Premises ONT ONT
??? 10G GPON BPON Traffic continues to increase 40-50% per year OTT Video, IOT, IPTV increasing over time Customer Traffic Continues to increase, suggesting > 10Gbps circa 2020 7
Additional Drivers: Business, Residential and Competition Supporting Business/Wireless carriers and Residential services over same fiber Leverage existing FTTP fiber for Ethernet > 1Gbps and Multiple 1 Gbps services on same PON Desire for graceful method to address congestion Some deployments reduce GPON splits to support 1Gbps to < 32 Positions for future Tiers of 1G+ Expected growth in Bandwidth needs to support small cell sites and 5G Increased Competition
NGPON2: How will it be deployed? TWDM OLT 1 1, 2 Channel Bonding, e.g.. Use of two 2 wavelengths at a time 20G/20G λ 4 NG-PON2 TWDM λ 3 λ 2 WM CO No Change in OSP λ 1 NGPON 2 (10G/10G) Office Park Splitter 1x32 Drop Can be different vendors GPON 1x32 3 New NG ONT GPON Cell Site NGPON 2 (10G/10G) NGPON (10G/10G) 64-128 way split Investigating lower Cost solutions: e.g. PAYG WM, N2 Optics and combined WM and CO Splitter
Strategic goal: NG-PON2 Interoperability Lessons learned: after-the-fact Interop work Vendor business case assuming deploying both OLT and ONT Standards-sanctioned non-interoperability Optional items Vendor-proprietary extension Need for comprehensive validation Verizon approach: three pillars of Interop Specifications: includes application use cases, sequence flows, ME definition (if needed), attribute definition & disambiguation (if needed). Updates to the specification are published once agreement is reached within the Verizon Open OMCI group, Validation: using a combination of vendor self-certification and Verizon-observed cross-vendor interoperability demonstration to validate specification compliance and correct functional operation. Deployment: go through the formal Verizon product verification process and appropriate OSS changes needed to support interoperable deployments as BAU Currently, a work in progress 10
Dimensions of NG-PON2 interoperability Interoperability is required between: ONT and OLT CT/EMS from different vendors within a wavelength channel Instances of OLT CT/EMS from different vendors within an NG-PON2 system OLT CT and ONT with optical transceivers of different vendors OLT CT/EMS and ONT from different vendors with the functional elements of Verizon network architecture Cross vendor ONT on same lambda Cross vendor TWDM mobility with consistent ranging and no MIB reload. Different vendors OLT on same PON 11
NGPON2 Requirements NGPON2 RFP issued at the end of 2015 Interoperability requirements formulated upfront and are applicable at day one of deployment Cost models for complete system, as well as individual components Vendors agree to compliance with Verizon interoperability specifications, and participation in Verizon sponsored interoperability test program NG-PON2 interoperability has to be there from day one Verizon established Verizon Open OMCI group, consists of system vendors and SoC vendors, to define specifications. Typically meets every week to discuss interop process/issues, documentation review etc. 12
Interoperability specifications Verizon established add hoc interoperability group Consists of system and SoC vendors Became known as OpenOMCI group Typically meets every week to discuss interop process/issues, documentation review etc Verizon OpenOMCI specification Is based on G.988, as amended, with best practice Appendices Defines end-user applications, and for each application, defines the supported OMCI MEs No optional MEs or attributes No vendor-proprietary OMCI objects (disclose and specify) Version 1.0 has been released, presented to Q2 which accepted a subset of the core MEs into G.988, and published. Verizon Open NETCONF/YANG To leverage existing deployments of Layer 2 Network Interface Devices (NIDs), ONTs supporting advanced Layer 2 services are dual-managed The advanced Layer2 services are managed using NETCONF protocol and YANG models that cover NID traffic management, Service OAM, Service Activation, and other Verizon-specific operational features. 13
Verizon NG-PON2 Interoperability Validation Based in Waltham, Mass ADTRAN, Broadcom, Calix/Ericsson, Cortina Access More participants coming Conducted bimonthly 2016 two events ; 2017 six events; 2018 six planned events Covers optical, PMD, PLOAM, OMCI interoperability for basic PON functions and for Single Family Unit services. Covers NETCONF/YANG for NID services. Since August: includes the operational aspect of interoperability and involves Verizon Operations and Engineering as an observers for the plug and play test scenarios Vendors travel on-site for 4 days of interop testing, following a Verizonauthored Test plan Vendors submit a test result document; any discrepancies are logged and appropriate corrective actions tracked 14
Outline of future Higher Speed PON requirements A Multi-channel TWDM PON system with the available data throughput of 50Gbps per channel At least four TWDM wavelength channel pairs. Accommodating residential, business, and wireless (mobile and fixed backhauling) services on the same fiber on the same platform. Wavelength channel bonding to support services with the data rate exceeding the data transmission rate of a single wavelength channel, with the bonded wavelength channel pairs terminated at different line cards. Designed to take advantage of the Watchful sleep power management mode and other energy efficiency featuers. 15
What's Still needed and Concluding Remarks Optics Ecosystem still needs more options to help drive costs lower (more optics vendors, N2 Optics for increased Split) Cost improvements with economies of scale by combining Business and Residential Services and integration of subscriber management into OLT Increased efficiencies in the OSP Expected improved customer experience Helps Verizon Stay ahead of its customers Business and Residential needs Working to deploy in 2018, Business first then Residential Services