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Success stories

Swisscom delivers exceptional HD voice quality with VoLTE

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Customer

  • Swisscom Switzerland
  • 6,6M subscribers
  • VoLTE launch in 2015
  • Best network in Switzerland
Logo Swisscom

Challenge

The competitive mobile market in Switzerland is served by three network operators and a small number of MVNOs. Higher data usage encouraged Swisscom to decide to switch off its 2G network infrastructure and utilize these assets for LTE and upcoming 5G services by 2020.

 

Back in 2015, Swisscom was the first mobile operator to launch Voice over LTE (VoLTE) service in Europe. Three years later, more than 2,6M VoLTE calls a day take place on their network.  Swisscom’s customers enjoy better quality with VoLTE. Call setup now only takes two to three seconds and voice quality is crystal clear. It provides Swisscom a clear competitive advantage over OTTs.

 

Swisscom called upon Astellia to help them deliver a highly reliable network without outages and interferences and help them guarantee top VoLTE experience from day one.

Solution

Astellia’s VoLTE service assurance solution, consisting of Nova Geo for geolocated RF optimization and Nova Explorer for end-to-end troubleshooting, has been deployed to monitor Swisscom’s network. The solution is being used by Swisscom’s radio and troubleshooting  engineers and an on-site Astellia expert.

 

Astellia accompanied Swisscom during the pre-VoLTE launch phase with their network preparation (RF optimization and troubleshooting). Now that the service is fully up and running, Astellia’s experts are performing on-going quality performance assessments and optimization tasks, including troubleshooting of VoLTE issues, SRVCC failures or intra-LTE handover errors. They also monitor closely VoLTE subscribers to detect areas with specific VoLTE issues or VoLTE compatible devices that do not perform well.

VoLTE phase

VoLTE implementation is not easy because IP-based calls are at greater risk of dropping when  customers move between antennas. With Astellia’s help we were able to provide an excellent service launch and a continuous  amazing HD voice quality experience to our subscribers.

Thomas Vonlanthen

Head of Wireless Access Technologies, Swisscom

Thomas Vonlanthen Thomas Vonlanthen, Head of Radio Access Technologies, Swisscom

Benefits

  • Super-fast VoLTE call connections
  • Crystal clear voice and video call quality
  • 60% less VoLTE drops following VoLTE black spots’ detection
  • Detection of handsets with high CSFB procedures
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