Effects of Packet Loss and Jitter on VoLTE Call Quality
This work provides insights into VoLTE call quality for telecom engineers and service providers, but it is incremental as it compares existing codecs without introducing new methods.
This study analyzed millions of VoLTE calls using AMR and AMR-WB codecs to assess call quality under network impairments, finding that AMR-WB calls are more robust and that quality dependence on packet loss is exponential for AMR and linear for AMR-WB.
This work performs a preliminary, comparative analysis of the end-to-end quality guaranteed by Voice over LTE (VoLTE), examining several millions of VoLTE calls that employ two popular speech audio codecs, namely, Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate WideBand (AMR-WB). To assess call quality, VQmon, an enhanced version of the standardized E-Model, is utilized. The study reveals to what extent AMR-WB based calls are more robust against network impairments than their narrowband counterparts; it further shows that the dependence of call quality on the packet loss rate is approximately exponential when the AMR codec is used, whereas it is nearly linear for the AMR-WB codec.