German company ADVA launched a modular multi-band Global Navigation Satellite Signal (GNSS) receiver for ePRTC and PRTC-B synchronization, bringing new levels of precision timing to 5G networks.  The new solution is engineered to overcome ionospheric delay variation that causes timing inaccuracy, enabling communication service providers (CSPs) and enterprises to deliver nanosecond precision.  Previously, this was achieved with expensive, rubidium clocks.  Now, there’s a simple and highly cost-effective way to upgrade installed synchronization infrastructure for unprecedented accuracy and reliability.  

The multi-band, multi-constellation GNSS receiver card plugs into ADVA’s OSA 5430 and OSA 5440, advanced core grandmaster clocks able to support PTP, NTP and SyncE over multiple 1Gbit/s and 10Gbit/s Ethernet interfaces.  This enables network operators to meet the requirements of the ITU’s stringent PRTC-B specifications and support the most advanced 5G applications.

The new multi-band GNSS Receiver answers the urgent demand for improved precision in GNSS-based timing.  Currently, most synchronization networks rely on single-band receivers, which can only be accurate to a limited degree as delay between satellites and receivers is affected by space weather.  This creates delay variations leading to time information being out of step by up to several tens of nanoseconds.  ADVA’s Oscilloquartz multi-band technology receives GNSS signals in several frequency bands, enabling it to use the delay differences between them to calculate delay variation and compensate for it.  This method is far more cost-effective than other techniques, such as deploying GNSS receivers with a filter implemented by a costly high-stability rubidium oscillator.  What’s more, the OSA 5440 can utilize two multi-band cards, providing ultimate hardware redundancy.

Operators can harness a solution with multi-band GNSS capabilities combined with ADVA’s core devices, which can deliver line rates up to 10Gbit/s and support ePRTC levels of timing accuracy.  The modular technology offers a way to enhance equipment in the field, achieve PRTC-B levels of timing and improve the timing accuracy of ePRTC. All that is required is an antenna upgrade. Then the multi-band solution can be plugged into the available slot of an OSA 5430 or OSA 5440 for the nanosecond accuracy.