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Synchronizing 5G networks

Our enhanced Oscilloquartz timing technology brings a new level of accuracy to synchronization networks. With a major new software upgrade and additional hardware, our OSA 5420, 5430 and 5440 enable mobile network operators to meet stringent 5G sync requirements while supporting all existing mobile technologies.

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Synchronizing 5G networks

  1. 1. Synchronizing 5G networks May 2020 Time accuracy within 100ns at the cell site
  2. 2. © 2020 ADVA. All rights reserved.22 Historically, SDH/SONET delivered frequency synchronization Ethernet reuses this technology with SyncE Central primary reference clocks (PRCs) provide precise synchronization signal Cesium atomic clock / GNSS receivers for frequency accuracy Distribution over SyncE-capable network elements Frequency synchronization is well established over mobile transport networks Frequency synchronization in 3G, 4G and LTE Ethernet with SyncE PRC Edge of mobile core
  3. 3. © 2020 ADVA. All rights reserved.33 Primary reference time clocks (PRTCs) deliver PTP-time based on satellite-synchronized oscillators PTP packets delivered over existing packet-based network Accuracy depends on network asymmetry and PDV Accuracy achieved at base station, subject to network delay characteristics Moderate phase and time-of-day synchronization from central timing source Introducing time synchronization in mobile RAN Edge of mobile core Ethernet with SyncE IEEE 1588 PTP PTP grandmaster PRTC
  4. 4. © 2020 ADVA. All rights reserved.44 Delivery of PTP over packet networks is improved by boundary/transparent clocks Transparent clock: compensates for delay of switches/routers Boundary clock: terminates PTP on slave port (before input queuing delays) and generates PTP on master ports (after output queuing delays) This architecture achieves sub- 1.1µs accuracy at base stations Adding PTP “awareness” to the packet network improves time delivery Improving accuracy of PTP delivery Boundary/transparent clock Edge of mobile core PTP grandmaster PRTC
  5. 5. © 2020 ADVA. All rights reserved.55 Synchronization requirements 2G/3G – frequency synchronization 3G TDD: 5µs time synchronization (large cells) LTE – multicast: several µs time synchronization LTE Advanced CoMP, TDD: 1.5µs time synchronization 5G – positioning: <100ns time sync (cluster) 5G – CA, IoT: several 100ns time sync (cluster) Fronthaul eCPRI: <100ns time sync (cluster) Accuracy needs to improve further
  6. 6. © 2020 ADVA. All rights reserved.66 ITU took action and tightened specifications of clocks and time clocks G.811.1: improving accuracy of PRC -> ePRC G.8272: improving PRTC with class B accuracy (with MB GNSS) G.8272.1: improving accuracy of PRTC by defining ePRTC using atomic cesium G.8273.2: improving BC with class C/D accuracy OSA54XX rel. 10.5.1. comes with BC class C,D and improved ePRTC capability Towards <100ns accuracy Edge of mobile core ePRTC OSA 542x OSA 5430/40 GM, combiner TC/BC class C/D OSA 3XXX Cs atomic clock
  7. 7. © 2020 ADVA. All rights reserved.77 ePRTC- Combining best GNSS technologies with most accurate atomic clocks ePRTC block diagram and evolution Single-band GNSS receiver (PRTC) OSA 3230B – dual cesium clocks (PRC) Enhanced PRTC combines PRC and PRTC with atomic clock Multi-band, multi-constellation GNSS receiver (PRTC-B) Dual cesium clocks (ePRC) ePRTC– uses ePRC and MB GNSS with higher accuracy + redundancy Clock combiner Clock combiner PTP SyncE ToD PPS 10MHz PTP SyncE ToD PPS 10MHz OSA 5430 OSA 5430
  8. 8. © 2020 ADVA. All rights reserved.88 Highly scalable PTP grandmaster supporting 2x 1024 clients @ max 128pps (1024 per CSM) Telecom grade fully redundancy hardware First PTP telecom grandmaster featuring 10G interface Highly scalable fan-out: • Up to 48x 10G ports • Up to 48x 1G ports • Up to 160 BITS ports • Up to 100 composite clock ports Simultaneously providing PTP and NTP as well as physical layer frequency synchronization Multi-band, multi-constellation GNSS input options including GPS, GLONASS, Beidou, and Galileo PTP input and SyncE input as backup to GNSS ePRTC and PRTC-B options BC type D OSA 5430/40 multi-technology core grandmaster OSA 5440 OSA 5430
  9. 9. © 2020 ADVA. All rights reserved.99 OSA 542x – the “Swiss Army Knife“ of synchronization PTP GM/BC type D / slave NTP server SSU Multiple I/F fan-out Sync probe G.8265.1 EnterpriseG.8275.2 G.8275.1 2G/3G/ 4G/5G FDD BS DOCSIS 3.1 MIFID ii 5G-NR/LTE TDD/LTE-A BS NTP61850-9-3/ C37.238 Smart grid
  10. 10. 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 g 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.