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From leased lines to optical spectrum services

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From leased lines to optical spectrum services
Cornelius Fürst & Henning Hinderthür, ADVA
NGON 2022, Barcelona, June 22, 2...

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© 2022 ADVA. All rights reserved.
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AGENDA
What is and what drives “optical spectrum as a service”?
1.
Network elements an...

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© 2022 ADVA. All rights reserved.
3
Technology progress enables new service definition
Coherent transport interface innova...

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From leased lines to optical spectrum services

With traffic demand growing exponentially and operator margins under extreme pressure, optical spectrum services provide a way to leverage the full value of optical network infrastructure assets. But how do current-generation optical line systems support transparent cross-border interconnection, and what opportunities arise from sharing optical spectrum resources internationally? At NGON & DCI World, Henning Hinderthür and Cornelius Fürst provided answers to these questions and more while demonstrating how extra value can be extracted from deployed networks by using a spectrum-as-a-service approach.

With traffic demand growing exponentially and operator margins under extreme pressure, optical spectrum services provide a way to leverage the full value of optical network infrastructure assets. But how do current-generation optical line systems support transparent cross-border interconnection, and what opportunities arise from sharing optical spectrum resources internationally? At NGON & DCI World, Henning Hinderthür and Cornelius Fürst provided answers to these questions and more while demonstrating how extra value can be extracted from deployed networks by using a spectrum-as-a-service approach.

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From leased lines to optical spectrum services

  1. 1. From leased lines to optical spectrum services Cornelius Fürst & Henning Hinderthür, ADVA NGON 2022, Barcelona, June 22, 2022
  2. 2. © 2022 ADVA. All rights reserved. 2 AGENDA What is and what drives “optical spectrum as a service”? 1. Network elements and functions for spectrum services 2. Creating spectrum services 3. Realization examples 4. From leased lines to optical spectrum services
  3. 3. © 2022 ADVA. All rights reserved. 3 Technology progress enables new service definition Coherent transport interface innovation • Coherent technology simplifies planning and operation • Ultra-flexible interfaces and adaptive networking optimize performance • 400G (Open)ZR+ moves traffic towards customer devices (IPoDWDM) • New service definitions feasible – wavelength & spectrum Flexgrid open line system (OLS) technology innovation • Programmable flexgrid technology with finest grid granularity is becoming standard • Flexible use of bandwidth enables new types of optical VPN services • SDN control automizes path setup 100-800G
  4. 4. © 2022 ADVA. All rights reserved. 4 • Optical spectrum is segmented into slices • Slices can be assigned to different users and applications • CSPs and carriers can sell unused spectrum • Bandwidth options beyond leased lines or dark fiber Monetize unused spectrum and provide differentiated services Spectrum as a service – What does it mean?
  5. 5. © 2022 ADVA. All rights reserved. 5 Market participants of spectrum services Spectrum service Spectrum service demarcation Open line system Users (customers) • Wholesale users • Carrier to carrier spectrum handoff • Datacenter operators • Large enterprises • R&E Providers • Bandwidth wholesaler carriers • R&E Operators • Co-op / shared infrastructure providers NMS/Controller
  6. 6. © 2022 ADVA. All rights reserved. 6 A truly open line system with open control and management is key Spectrum as a service – the OLS building blocks Programmable flexgrid technology Gridless spectrum allocation Support for any coherent format and baud rate Service demarcation and monitoring Optical spectrum policing Strict user separation Open optical line system Truly open and disaggregated OLS design Full OLS characterization (GOSNR) Open control and management Programmability with open APIs Network slicing with client control
  7. 7. © 2022 ADVA. All rights reserved. 7 Practical requirements for successful realization Support on multiple layers: • Spectrum (Media channel) • Wavelength (OTSi/OTSiA) • Mapped channel (ODU) • Multiplexed (ODUk) Open spectrum service gateway between domains and participating organi- zations, with policing. Well defined procedures for: • Planning • Installation • Reliable service commissioning Service support Open gateway Procedures Collaboration between operators while keeping privacy on network domains (detailed parameters and network control) Collaboration Analog services have higher operational complexity than digital leased lines
  8. 8. © 2022 ADVA. All rights reserved. 8 Spectrum service support ITU G.807, G.709, G.798 OTSi : Optical Tributary Signal OTSiA : OTSi Assembly with non-associated overhead Spectrum modelling in software Spectrum services based on standards: • Built on Flexgrid OLS layer • Bandwidth management software creating Network Media Channel (NMC) and Network Media Channel Groups (NMCG) Spectrum services require individual channel (OTSi) provisioning: • OTSi based equalization of spectrum services in the OLS • Definition of interdomain interface • Wavelength and spectrum services only differ in number of channels Spectrum reservation for scalable spectrum service Spectrum service reservation NMCG OTSiA Multiple OTSi OTSiA Single OTSi NMC Transmit spectrum
  9. 9. © 2022 ADVA. All rights reserved. 9 Wavelength selective device required Spectrum demarcation functions: • Spectrum monitoring • Passband configuration • Ingress power level control – based on PSD* • Spectrum policing and enforcement • Multiplex to network ports Demarcation: open spectrum gateway Spectrum Services OLS / ROADM degree Spectrum service demarcation Service 1 Service 2 Service N *power spectral density
  10. 10. © 2022 ADVA. All rights reserved. 10 • Setup of the individual interfaces (OTSi) • End-to-end performance characterization Path planning Performance estimation • Routing and selection of candidate paths • Calculating constraints for services Dedicated OLS planning tool provides GOSNR limits (anonymous parameter) Channel (OTSi) setup with performance verification Non-digital services require reliable commissioning procedures
  11. 11. © 2022 ADVA. All rights reserved. 11 Two-step approach: Performance estimation followed by verification • Installation and provisioning of a service without complete network knowledge • Characterization of the planned and implemented path (NMC) • GOSNR / GSNR based probing methods Path verification Service setup with path characterization Q 2 (dB) Measured OSNR/Estimated GOSNR (dB) 100G QPSK 200G QPSK 300G 8QAM 400G 16QAM Characterized probing units Kaeval, K., Myyry, J., K., Grobe, K., Grießer, H. and Jervan, G., 2021, October. “Concatenated GSNR Profiles for End-to-End Performance Estimations in Disaggregated Networks”. In 2022 Optical Fiber Communications Conference and Exhibition (OFC) (pp. 1-3).IEEE.
  12. 12. © 2022 ADVA. All rights reserved. 12 Single-domain Network Media Channel (NMC) • Customer and network operator negotiate characteristics of spectrum service • Network operator provides path (via domain controller) and performance estimate (GOSNR) • Demarcation device provides signal control and policing Single domain Control: Using APIs & SDN for automation Domain controller A Network A NBI Spectrum service customer Gateway device
  13. 13. © 2022 ADVA. All rights reserved. 13 Multi-domain NMC • Operators and customer negotiate characteristics of spectrum service • Same profile on all demarcation devices: OTSiA, individual OTSi’s, power levels • Requires collaboration of domain operators • Routing is domain internal Multiple domains Control: Using APIs & SDN for automation Domain controller B Domain controller A NBI NBI Spectrum service customer Network B Separate domains Network A
  14. 14. © 2022 ADVA. All rights reserved. 14 Spectrum services in a multi-operator network Example 1 – Baltic Optical Network • Different vendors and network technologies • Unified spectrum allocation • Transparent ROADM-based interconnects at border crossings • Automated domain-based service creation • Unregenerated, protected end-to-end services • >8800 km European network • Connecting Estonia, Latvia & Lithuania • 3 national and 1 ultra long-haul domain Multi-operator network Network concept
  15. 15. © 2022 ADVA. All rights reserved. 15 Ultra long-haul transmission with interdomain traffic • Interdomain express links using ROADM client connections • >2.000km / 10.000km with 800/400G coherent interfaces Example 2: Spectrum gateway and reach 800G over 2.266km 4.14bits/sym 28 WSS modules 44 EDFA, 16 Raman Long term error free 400G over 10.000km 2bits/sym >100 WSS modules >150 EDFA, >60 Raman Error free testing Source: CSC - IT Center for Science Ltd
  16. 16. © 2022 ADVA. All rights reserved. 16 Coherent pluggable based services over open OLS • Customer lab test configuration >1.000km, 75GHz channel spacing • Error free performance using off-the-shelf 400G OpenZR+ optics, 26 Tb/s fiber capacity Example 3: 400G OpenZR+ with open OLS EDFA/Raman 32-degree ROADM 75GHz Add-drop ADVA FSP 3000 OLS 400G OpenZR+ 400G OpenZR+
  17. 17. © 2022 ADVA. All rights reserved. 17 OOPT-CANDI proof of concept (PoC) 2021 Example 4: SDN automation Integration validation across several functionalities: • Network topology discovery of the open OLS and OTs into the optical SDN controller • On-line provisioning of optical circuits using an external vendor-neutral planning tool • Establishment of optical circuits over partially disaggregated OLS Source: Telecom Infra project Service planning and creation in multivendor optical networks Multi-vendor implementation
  18. 18. © 2022 ADVA. All rights reserved. 18 Extending service offering from leased lines to spectrum Spectrum as a service – your benefits New service types for emerging end user demands • Enables CSPs to offer differentiated services and enables new forms of revenue generation • More customers options for bandwidth addition • Requires an open system - better with demarcation, control/automation and (some) standardization • Similar service attributes as leased lines, e.g., resiliency (restoration)
  19. 19. Thank you IMPORTANT NOTICE ADVA is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA. info@adva.com

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