Evaluating Time Sync Variation By Measuring PTP Wander

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The enhancement provides improved time synchronisation measurement for 5G mobile networks and communications

Anritsu Corporation has added a function for PTP wander, a metrics for evaluating frequency variations as low as 10 Hz to the Precision Time Protocol (PTP) network time synchronisation error to the company’s smallest-in-class 100 Gbps Network Master Pro MT1000A.

5G networks require high real-time communications supporting anticipated new services in various industries, such as autonomous vehicles, smart factories, telemedicine, etc. PTP wander is a key index expressing long-term time synchronisation stability. Adding this improved time sync measurement to the MT1000A will play an important role in assuring 5G network quality.

Development Background

Due to their advantages of ultra-high speeds, high reliability and low latency and multiple simultaneous connections, 5G communications networks are spreading into various use scenarios.

Of these, high-reliability and low-latency communications are key features for implementing various industrial use cases, such as autonomous vehicles, smart factories, telemedicine, etc. Applications using these mission-critical technologies demand the smallest possible communications latency to facilitate equipment peer-to-peer communications at the highest speeds in almost real-time, while also requiring precision time synchronisation between each equipment.

Additionally, implementing low-latency communications requires support for Multi-access Edge Computing (MEC) architectures in 5G networks, and precision time synchronisation is essential to achieving communications between MEC systems distributed at each site.

Implementing time synchronisation uses network technologies called SyncE and PTP, and assuring high accuracy and high stability synchronisation using these technologies is linked to operators’ service quality guarantees about high speeds and low latency.

Based on a long experience of developing high-level technologies, Anritsu has now added this new time error PTP wander measurement function to MT1000A time synchronisation measurements. Measuring wander supports quantitative evaluation of long-term synchronisation stability. In addition, support for measurement of new time-synchronisation networks called PTS will help assure customers’ service quality guarantees.

Product Outline

The MU100090B is a GNSS disciplined oscillator supporting the GPS, QZSS, Galileo, Beidou and GLONASS. It can receive signals from each artificial satellite system and outputs UTC-traceable reference time and 10-MHz frequency signals. This reference timing is supplied to the portable MT1000A supporting SyncE and PTP up to 25 Gbps to measure network time synchronisation accuracy.

Moreover, combination with the SyncE Wander MU100011A-021 and MU100090B software options facilitates ITU-T recommended pass/fail evaluation of network-supplied Ethernet frequency accuracy.

When used with the Site Over Remote Access MX109020A software, multiple MT1000A units located at separate sites can be remotely operated and monitored from a central office to support speedy troubleshooting when synchronization problems occur.

Target Markets and Applications

  • Target Markets: Communications carriers, network installers, communications equipment vendors, MEC service businesses 
  • Applications: Installation, maintenance and troubleshooting of communications networks, easy evaluation of communications equipment, service quality evaluation

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