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Phase/Time Synchronization: Source FailoverEricsson, Huawei, Meinberg, Microsemi, Seiko, ZTE

EANTC Interop 2019

Clock Synchronization Test Case

Phase/Time Synchronization: Source Failover

Heiko Gerstung, MeinbergKarim Traore, Microchip

April 9, 2019MPLS+SDN Word Congress 2019, Paris

Clock Synchronization Test Case

Phase/Time Synchronization: Source Failover

Two GNSS synchronized grandmaster clocks providing phase/time synchronization to a number of slave clocks via one telecom boundary clock

Simulation of GNSS outage (disconnecting antenna) Slave clocks must maintain the required sync performance before, during

and after the failover event Using ITU-T G.8275.1 (Multicast Layer 3) for GM BC and BC SC

Phase/Time Synchronization: Source FailoverPurpose of this test case: Correct handling of failover scenarios by boundary clocks and slave clocks SC Maintaining accuracy as specified in ITU-T G.8271 (level 4): +/- 1.5 us Verification of correct behavior of BC (switching between GMs)

Participating Vendors: GMs: Microsemi, Meinberg BC: Huawei SCs: ADVA, ZTE Measurement Device: Calnex Paragon-TOther combinations in the Whitepaper!

Test Setup:

GM A:Microsemi

TP5000

GPS

GM B:Meinberg

microSync HR

GPS

BC:Huawei NE40E_F1A

SC A:Ericsson

Router 6672

SC B:ZTE ZXCTN9000-18EA

Frequency/PhaseAnalyzer

Calnex Paragon-T

PPS+Freq

GPS

Test Procedure:

GM A:Microsemi

TP5000

GPS

GM B:Meinberg

microSync HR

GPS

BC:Huawei NE40E_F1A

SC A:Ericsson

Router 6672

SC B:ZTE ZXCTN9000-18EA

Frequency/PhaseAnalyzer

Calnex Paragon-T

PPS+Freq

GPS

1. Both GMs synchronized to GPS2. BC synchronized to GM A3. SC synchronized to BC4. Disconnect GPS for GM_A5. BC switches to GM_B6. Disconnect GPS for GM_B7. BC switches to GM_A8. Reconnect GPS to GM_B9. BC switches to GM_B10. Reconnect GPS to GM_A11. BC switches to GM_A

Phase/Time Synchronization: Source Failover

Results:

Interoperability successfully demonstrated between participating devices Measured phase offset within 1.1 us (level 4 + 0.4 us additional error

budget) for all successfully tested combinations Measured phase offset level 6 (+/- 260ns) for some combinations

Thank You for Your Attention!

Do not forget to grab a copy of the 2019 Edition of the EANTC Whitepaper! You can get your electronic copy at www.eantc.de !

Questions? Right now, right here! After the presentation – come and see me or the EANTC team! Any time: heiko.gerstung@meinberg.de

EANTC Interop 2019

Clock Synchronization Test Case

Phase/Time Synchronization: Source Failover

Heiko Gerstung, Meinberg

April 9, 2019MPLS+SDN Word Congress 2019, Paris