Sync on TAP - Syncing infrastructure with software
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The document discusses the evolving role of software in synchronization infrastructure, focusing on trends in data centers, the advantages of white box servers, and low-latency synchronization options. It emphasizes the importance of dedicated hardware for high-accuracy applications and presents the capabilities of the 'Sync on Tap' solution, which utilizes PCI-E architecture for improved performance. The conclusion highlights the potential for achieving up to 10ns accuracy in synchronization through this approach.
Sync on TAP - Syncing infrastructure with software
- 1. Sync on TAP – Syncing infrastructure with software Nov 2022 K Hann, senior director, R&D, Oscilloquartz, ADVA
- 2. © 2022 ADVA. All rights reserved. 2 • Data center / general trends • Motivation for synchronization with software • Time Appliance Project • O-RAN architecture • Software (virtual) synchronization • Options; results; interfaces Agenda
- 3. © 2022 ADVA. All rights reserved. 3 New role of Software in synchronization Miniaturization Consolidation General trends Cloud trends Scalability Explosive growth (synchronization management) Sustainability Open source (white box) (efficiencies of scale) Accuracy; resiliency; security
- 4. © 2022 ADVA. All rights reserved. 4 Clocks - Hardware with “soul” PPS or PTP • HW timestamping of events • Accuracy HW (~1ns) • Accuracy SW (~1us) • Huge vendor investment Interface(s) CPU Application (SW) HW clock (PHC) (RTC/PLL) OS Application (SW) ` ... ...
- 5. © 2022 ADVA. All rights reserved. 5 Existing clocks/applications use dedicated HW Synchronization network management Optical Cs ePRC+ NG GM/SSU Magnetic PRC/ePRC Access Edge Core NG GM/SSU device/network Monitor Front/backhaul Core network O-RAN/edge DC TV studio Defense comm Aviation radars Data center Financial trading 911 center Smart power grids HP Optical Cs Cesium
- 6. © 2022 ADVA. All rights reserved. 6 Why? Software synchronization
- 7. © 2022 ADVA. All rights reserved. 7 Datacenters – open time server = TimeCard + standard server + standard NIC • Interconnect via PCIe (using PTM) • Optional PPS connections (to ensure high accuracy) TAP use case:
- 8. © 2022 ADVA. All rights reserved. 8 M.2 slot is commonly available and allows smooth sync add on OSA PCIe TimeCard with M.2 module as core Core built as M.2 Sync Module Concept Implementation
- 9. © 2022 ADVA. All rights reserved. 9 O-RU based on white box server + NIC + Accelerator High accuracy sync over PCIe Telecoms - Open-RAN architecture
- 10. © 2022 ADVA. All rights reserved. 10 HOW? Software Synchronization
- 11. © 2022 ADVA. All rights reserved. 11 White box server with SoftSync Oscilloquartz solution • HW timestamping NIC (Intel) • SoftSync PTP client on host machine • Synchronizes OS with system APIs • Performance ~ 100ns (timestamping NIC) Interface(s) NIC CPU Software app 1 SoftSync OS Software app 2 PPS or PTP `
- 12. © 2022 ADVA. All rights reserved. 12 SoftSync measurement using G.8265.1 master Back to back
- 13. © 2022 ADVA. All rights reserved. 13 White box server with PCIe / M.2 interface • GNSS input • Local Ethernet port (PTP) • No offset between GNSS and Ethernet • PCIe port Interface PCIe CPU Software app 1 OS Software app 2 GNSS Local Ethernet
- 14. © 2022 ADVA. All rights reserved. 14 Precision time measurement Synchronization over PCI-e (PTM)
- 15. © 2022 ADVA. All rights reserved. 15 White box server with PCIe / M.2 interface PTM on PCIe to improve performance • PTM support on PCIe • PCIe <-> CPU ~10ns • CPU <-> OS ~ 1ns • No offset between GNSS and Ethernet (PTP) • Class C BC possible • PTM available 2023 PCIe CPU Software app 1 OS Software app 2 GNSS Local Ethernet PTM
- 16. © 2022 ADVA. All rights reserved. 16 Synchronization of virtualized applications, e.g., O-RAN What other applications? Infrastructure synchronized by SW PCIe CPU Application 2 O-RU PCIe CPU Application 1 O-DU Ethernet Ethernet PTM PTM PTP TGPIO TGPIO
- 17. © 2022 ADVA. All rights reserved. 17 Conclusions 1) Highest accuracy applications require dedicated HW 2) Sync on COTs server (TAP; O-RAN) • Available today ~100ns (e.g., SoftSync) • PTM enables ~10ns accuracy (also for virtualized SW) • PCIe = Timing interface 3) M.2 Sync Module = small footprint PCI-e
- 18. 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@oscilloquartz.com