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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: [email protected]
EANTC Interop 2019
Clock Synchronization Test Case
Phase/Time Synchronization: Source Failover
Heiko Gerstung, Meinberg
April 9, 2019MPLS+SDN Word Congress 2019, Paris