VoLTE performance improvement project

Aspire has successfully executed a project aimed at enhancing VoLTE performance for a Tier-1 Group Operator. The operator had the need to improve the voice perceived quality, and one of the key aspects impacting that experience was call setup time for VoLTE calls. That led them to partner with Aspire to enhance this service. Through our expertise and dedicated efforts, we were able to significantly reduce call setup times to under 1000 ms ultimately enhancing the overall VoLTE calls customer experience.

To identify the issues leading to long call setup times compared to the operator’s main competitor, we utilized a combination of End-to-End (E2E) network traces, drive test logs, Call Detail Records (CDRs), performance, and configuration management network data. Aspire collaborated with the client’s engineering and operations teams to address unusual delays in the Session Initiation Protocol (SIP) Invite exchange between Terminating Multimedia Telephony Application Server (MTAS) and Call Session Control Function (CSCF), and recommended the removal of redundant signaling messages during the call setup stage.

The benefits of our joint efforts to optimize voice quality were significant. In particular, we were able to reduce the Mobile Originated (MO) call setup time by 32%, and Mobile Terminated (MT) call setup time by 62%.

We are grateful for the opportunity to work with this client and share our knowledge with their teams while delivering these results. It is through such fruitful partnerships that we keep growing with our clients and have been expanding our footprint Globally.

We are extremely proud of Aspire’s heritage and reputation in End-to-End (E2E) network performance improvement services. Our clients’ benefits range from improving net promoter scores, winning benchmarking campaigns, improve network return on investment to delayed network investments.