Synchronization for 5G: the requirements and the solutions

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Gil Biran's Small Cell World Summit presentation outlined the key synchronization requirements and solutions for mobile networks in the era of 5G. Check out the slide deck to discover how longest holdover and highest precision can be achieved with the industry's most comprehensive timing technology portfolio.

Technology

Synchronization for 5G: the requirements
and the solutions
Gil Biran, SVP and GM, Oscilloquartz
SCWS 2019

© 2019 ADVA Optical Networking. All rights reserved.22
Synchronization requirements in mobile networks
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
Increased
spectral efficiency
and data throughput

© 2019 ADVA Optical Networking. All rights reserved.33
5G synchronization requirements
Standard 5G TDD networks require ±1.5μs end-to-end (same as 3G and 4G)
Cooperative radio techniques (e.g., inter-site CA, CoMP, MIMO) require much tighter
synchronization when deployed
• Consensus seems to be around ±130ns, but only between RRUs connected to the same DU
• This permits “sync clusters” of very tightly synchronized elements

© 2019 ADVA Optical Networking. All rights reserved.44
Enhanced clock specifications for 5G
D D
+/-4ns +/-4ns

© 2019 ADVA Optical Networking. All rights reserved.66
Emerging synchronization architecture for most stringent timing requirements
Synchronization with eCPRI front- and backhaul
RRH
RRH
RRH eCPRI fronthaul
network: FOPS
G.8275.1
BC and SyncE
Cell sites with eRE
for fronthaul timing
CU and DU with
eREC fronthaul
timing and GNSS-
disciplined GM
Core network: full or
partial on-path
support
BC and SyncE
Central
synchronization
delivery with
grandmaster and
ePRTC
+/-100nsec
+/-1100nsec
Fronthaul Backhaul
DU
Midhaul
CU

© 2019 ADVA Optical Networking. All rights reserved.77
5G synchronization architecture
eCPRI
BackhaulMidhaulFronthaul
Ethernet
+/-100nsec
+/-1100nsec
Access
unit
Distribution
unit
Central
units
Telecom
grandmaster
AU DU
CU
CU
CU
G.8275.1 or G.8275.2G.8275.1
RRU
RRU

© 2019 ADVA Optical Networking. All rights reserved.88
Solution portfolio
Many opportunities to enhance accuracy of time distribution
OSA 5401 SyncPlugTM:
SFP-based cell site PTP
grandmaster
OSA 5405 SyncReachTM:
cell-site grandmaster with
integrated dual GNSS
receiver
OSA 5420/30/40: edge/
core grandmaster
featuring 1/10GE interfaces
OSA 3230B: atomic cesium
clock for highest precision
and longest holdover
Cell site
Back-/fronthaul
Central office
ePRTC solution

Thank you
IMPORTANT NOTICE
The content of this presentation is strictly confidential. ADVA Optical Networking 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
Optical Networking 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 Optical Networking.

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Strategize a Smooth Tenant-to-tenant Migration and Copilot Takeoff

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Strategize a Smooth Tenant-to-tenant Migration and Copilot Takeoff

Synchronization for 5G: the requirements and the solutions

1. Synchronization for 5G: the requirements and the solutions Gil Biran, SVP and GM, Oscilloquartz SCWS 2019

2. © 2019 ADVA Optical Networking. All rights reserved.22 Synchronization requirements in mobile networks 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 Increased spectral efficiency and data throughput

3. © 2019 ADVA Optical Networking. All rights reserved.33 5G synchronization requirements Standard 5G TDD networks require ±1.5μs end-to-end (same as 3G and 4G) Cooperative radio techniques (e.g., inter-site CA, CoMP, MIMO) require much tighter synchronization when deployed • Consensus seems to be around ±130ns, but only between RRUs connected to the same DU • This permits “sync clusters” of very tightly synchronized elements

5. © 2019 ADVA Optical Networking. All rights reserved.55 BBU is further split into DU/CU with very stringent timing requirements From 4G eNB to 5G gNB synchronization evolution 4G: RRH connected over CPRI with in-band synchronization 5G: gNB with Ethernet connectivity and DU/CU using PTP for accurate timing RRU connected over eCPRI with PTP synchronization EPCBBU RRH PTP Profile G.8275.1/.2 DU CU 5G RRU PTP Profile G.8275.1/.2 EPC G.8275.1 T-GM SyncE SyncE T-GM T-TSC SyncE T-TSC T-BC ETH-IPETH/eCPRI

6. © 2019 ADVA Optical Networking. All rights reserved.66 Emerging synchronization architecture for most stringent timing requirements Synchronization with eCPRI front- and backhaul RRH RRH RRH eCPRI fronthaul network: FOPS G.8275.1 BC and SyncE Cell sites with eRE for fronthaul timing CU and DU with eREC fronthaul timing and GNSS- disciplined GM Core network: full or partial on-path support BC and SyncE Central synchronization delivery with grandmaster and ePRTC +/-100nsec +/-1100nsec Fronthaul Backhaul DU Midhaul CU

7. © 2019 ADVA Optical Networking. All rights reserved.77 5G synchronization architecture eCPRI BackhaulMidhaulFronthaul Ethernet +/-100nsec +/-1100nsec Access unit Distribution unit Central units Telecom grandmaster AU DU CU CU CU G.8275.1 or G.8275.2G.8275.1 RRU RRU

8. © 2019 ADVA Optical Networking. All rights reserved.88 Solution portfolio Many opportunities to enhance accuracy of time distribution OSA 5401 SyncPlugTM: SFP-based cell site PTP grandmaster OSA 5405 SyncReachTM: cell-site grandmaster with integrated dual GNSS receiver OSA 5420/30/40: edge/ core grandmaster featuring 1/10GE interfaces OSA 3230B: atomic cesium clock for highest precision and longest holdover Cell site Back-/fronthaul Central office ePRTC solution

9. Thank you IMPORTANT NOTICE The content of this presentation is strictly confidential. ADVA Optical Networking 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 Optical Networking 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 Optical Networking.

Synchronization for 5G: the requirements and the solutions

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