Viavi's New RF Test Solution Allows 24/7 Remote Monitoring of Cell Sites

Viavi Solutions has introduced CPRIAdvisor, an interference monitoring solution that increases RF visibility by performing continuous monitoring of the mobile spectrum, and allowing remote access to expedite maintenance and problem resolution. It allows mobile service providers to remotely monitor RF conditions 24/7 for any fiber-to-the-antenna cell site.

With the success of CPRI front-haul deployments, and the never-ending growth of mobile data, service providers are expanding from a typical distributed RAN architecture to a C-RAN (Centralized RAN) network topology. In C-RAN, base band units (BBUs) are co-located at a remote facility, and connected via CPRI links to a substantial number of remote radios spread around the network. Where C-RAN offers network and spectral efficiency, it also offers an opportunity for mobile service providers to troubleshoot network issues like RF interference in a more effective way.

Viavi has partnered with mobile operators to develop CPRIAdvisor, a new RF test solution that takes advantage of C-RAN architecture to offer the following features and benefits:

  • Visibility: Increases RF visibility by performing continuous monitoring of the mobile spectrum and allowing remote access to expedite maintenance and problem resolution
  • Scalability: CPRIAdvisor is based on network probes with RF over Fiber (RFoFiber) technology, and is able to de-map RF components from fiber front-haul (CPRI or OBSAI) with flexibility in port density providing solutions for any type of cell-site. Whether it is a macro cell with a smaller number of front-haul fiber links or a large DAS/C-RAN with hundreds of front-haul links, CPRIAdvisor solution can handle both.
  • Efficiency: Depending on the network configuration, CPRIAdvisor can save more than 50% in terms of time and cost by offering unmatched maintenance efficiencies, and ultimately providing better mobile services and end user experience.


  • Macro-Cell RF spectrum monitoring
  • C-RAN/DAS RF spectrum monitoring

Key Features:

  • Alarm monitoring and notification
  • CPRI/OBSAI layer-2 alarm monitoring
  • Optical received (RX) power meter
  • RSSI alarm logging (saved with spectrum data and alarm details)
  • PIM detection and alarm logging (saved with spectrum data and alarm details)
  • Real time spectrum measurement
  • RF spectrum analysis with multiple-trace and markers
  • Spectrum logging and replay
  • Spectrum logging for extended measurements (e.g. 7 days up to 12 trace at a time).
  • Spectrum/spectrogram replay capability for post analysis.
  • Easy to set up
  • Stores up to ten thousand CPRI profiles in allowing auto-configuration for proper RF measurements (IQ de-mapping) of any RRH.
  • Profile database editing, enabling faster configuration in multi-site topologies.

Viavi was the first to market with RFoCPRI support, allowing customers to troubleshoot RF issues from the ground for remote radio based cell-sites. The addition of CPRIAdvisor to Viavi's RF test solution portfolio offers mobile operators even greater flexibility for monitoring and maintaining cell sites.