Sync on TAP - Syncing infrastructure with software

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At ITSF 2022, Ken Hann discussed our new OSA SoftSync™ client software, which adds advanced PTP timing technology to server-hosted applications, and the OSA 5400 M.2, which brings precise timing to COTs servers or even virtual machines. The session outlined how, for a low total cost of ownership, OSA SoftSync™ creates an end-to-end synchronization architecture able to meet the needs of advanced time-critical services. This will be invaluable for 5G, financial institutions, data center networks and other time-critical applications.

Technology

Sync on TAP – Syncing infrastructure with software
Nov 2022
K Hann, senior director, R&D, Oscilloquartz, ADVA

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2
• Data center / general trends
• Motivation for synchronization with software
• Time Appliance Project
• O-RAN architecture
• Software (virtual) synchronization
• Options; results; interfaces
Agenda

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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

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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)
`
...
...

© 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

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6
Why?
Software synchronization

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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:

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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

© 2022 ADVA. All rights reserved.
9
O-RU based on white box server + NIC + Accelerator
High accuracy sync over PCIe
Telecoms - Open-RAN architecture

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10
HOW?
Software Synchronization

© 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
`

© 2022 ADVA. All rights reserved.
12
SoftSync measurement using G.8265.1 master
Back to back

© 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

© 2022 ADVA. All rights reserved.
14
Precision time measurement
Synchronization over PCI-e (PTM)

© 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

© 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

© 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

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

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Created by Mozilla Research in 2012 and now part of Linux Foundation Europe, the Servo project is an experimental rendering engine written in Rust. It combines memory safety and concurrency to create an independent, modular, and embeddable rendering engine that adheres to web standards. Stewardship of Servo moved from Mozilla Research to the Linux Foundation in 2020, where its mission remains unchanged. After some slow years, in 2023 there has been renewed activity on the project, with a roadmap now focused on improving the engine’s CSS 2 conformance, exploring Android support, and making Servo a practical embeddable rendering engine. In this presentation, Rakhi Sharma reviews the status of the project, our recent developments in 2023, our collaboration with Tauri to make Servo an easy-to-use embeddable rendering engine, and our plans for the future to make Servo an alternative web rendering engine for the embedded devices industry. (c) Embedded Open Source Summit 2024 April 16-18, 2024 Seattle, Washington (US) https://events.linuxfoundation.org/embedded-open-source-summit/ https://ossna2024.sched.com/event/1aBNF/a-year-of-servo-reboot-where-are-we-now-rakhi-sharma-igalia

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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

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:

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 `

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

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

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