Solving synchronization challenges with critical infrastructures
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The document discusses the importance of precise timing for critical infrastructures and the challenges associated with satellite-delivered timing, including GNSS vulnerabilities and signal degradation. It proposes solutions that combine robust GNSS receivers with network-delivered timing to enhance accuracy and resilience against disruptions. The document highlights recent governmental initiatives aimed at improving national resilience in positioning, navigation, and timing services.
Solving synchronization challenges with critical infrastructures
- 1. Solving synchronization challenges with critical infrastructures Ulrich Kohn, CISSP – solutions marketing January 2021
- 2. © 2021 ADVA. All rights reserved. 2 Timing is essential for business continuity Critical infrastructures require precise timing Mobile radio networks Financial trading Digital cable networks Power utilities Data center infrastructure Broadcast networks As timing accuracy increases, many operations apply satellite-delivered time A simple way to deliver synch at the edge Global navigation satellite systems (GNSS): GPS, Galileo, GLONASS, BeiDou
- 3. © 2021 ADVA. All rights reserved. 3 Challenges with satellite-delivered timing • GNSS outages or temporarily degraded signal quality • Ionospheric disturbances • solar activity • Jamming: overpowering weak GNSS signal • Spoofing: fake GNSS signal • Obstructions from new buildings, growing trees • Antenna construction frequently does not achieve clear sky view • Interference from high- power RF transmitters such as TV, cellular, radar, µWave Is GNSS your only source for synchronization? You should be scared!
- 4. © 2021 ADVA. All rights reserved. 4 The solution: combining robust GNSS receivers and network-delivered timing Resilient timing is a matter of national interest Governmental response US executive order on strengthening national resilience through responsible use of positioning, navigation, and timing services. February 12, 2020 Germany BSI Gesetz $8a: Betreiber Kritischer Infrastrukturen sind verpflichtet....technische Vorkehrungen zur Vermeidung von Störungen der Verfügbarkeit... ...many governments request critical infrastructures to secure business continuity by securing their IT Solution Galileo GPS Robust satellite- delivered timing Packet network Atomic clock network-delivered timing
- 5. © 2021 ADVA. All rights reserved. 5 Dual-constellation Dual-band Hardware-supported attack detection AI/ML-assisted monitoring e.g., Galileo e.g., GPS Improving resilience by using multiple GNSS technologies Ionospheric disturbance is compensated for better accuracy Frequency 1 Analyzing GNSS data to predict issues and counteract proactively Monitoring GNSS signals from different sources to identify attacks at receiver Frequency 2 Making satellite-timing robust and accurate
- 6. © 2021 ADVA. All rights reserved. 6 • Communication in L1 and L2 band • Dual measurements make it possible to compensate for ionospheric disturbances • Multi-band GNSS receivers achieve time accuracy of better than 10ns Multi-band GNSS receiver Nanosecond time accuracy with multi-band GNSS receivers Improving accuracy of GNSS receivers Lower L-band Upper L-band Delay difference Ionospheric disturbance 0 10 20 30 40 50 ns Ionospheric daily delay variation 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00
- 7. © 2021 ADVA. All rights reserved. 7 Migrating towards a future-proof sync architecture Higher availability Better accuracy Adding ePRC, ePRTC at core Optical timing channel: delivering PRTC-grade timing over DWDM networks High-performance sync overlay
- 8. © 2021 ADVA. All rights reserved. 8 Optical line system Intermediate site DWDM node with timing access Terminal west Terminal east PTP and SyncE over optical timing channel Payload traffic High-accuracy timing device featuring PTP boundary clock class D (TEmax: 5ns) Bidirectional transceivers Line terminal
- 9. © 2021 ADVA. All rights reserved. 9 Availability: Combining satellite- with network- delivered timing Synchronization interfaces: Legacy ToD, PPS and IRIG-B as well as latest PTP featuring power profile Best practices: Applying multi-technology devices for seamless migration and resilient operation Combining GNSS with network timing for accuracy and resiliency Resilient and accurate sub-station timing Hybrid sub-station PTP power profile IRIG-B, ToD, 1PPS Core clock Access clock Synchronization Global navigation and satellite system (GNSS) Packet-optical transport
- 10. © 2021 ADVA. All rights reserved. 10 OSA 542x for multi-technology synchronization OSA 5420 with IRIG and BITS card IRIG interface card SSU, BITS, PPS IRIG NTP server PTP GM, BC, TC GNSS receiver Sync probe, sync assurance
- 11. © 2021 ADVA. All rights reserved. 11 A major innovation in atomic cesium technology OSA3350 ePRC+ is your perfect clock to backup GNSS New optical cesium clocks for better stability and longer lifetime Applicable as ultra-precise frequency and time clocks Backup GPS/GNSS in mobile networks, power utilities, defense among other critical infrastructures OSA 3350 ePRC+
- 12. © 2021 ADVA. All rights reserved. 12 Ensemble Sync Director - GNSS assurance GNSS monitoring and fault analysis Health status of all GNSS receivers Identifying blind sport Smart analysis over time Transparent GUI Optimize antenna positioning and receiver setting Performance monitoring Root cause analysis
- 13. © 2021 ADVA. All rights reserved. 13 Act now! Key takeaways GPS and GNSS vulnerabilities threaten critical infrastructures Make GNSS receivers robust Backup/transit to network- delivered timing ADVA and Oscilloquartz provide superior solutions
- 14. Thank you IMPORTANT NOTICE The content of this presentation is strictly confidential. 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