A new ITU standard highlights the key factors influencing end-to-end Quality of Service (QoS) for voice communications over 4G mobile networks. The standard will form the basis of future ITU standards on specific aspects of QoS for Voice over LTE (VoLTE) and Video-telephony over LTE (ViLTE).
The entrance of 4G mobile-wireless communications signalled the arrival of a multimedia-rich user experience. Despite 4G’s significant advances over previous generations of mobile-wireless technology, ensuring high-quality voice communications remains a significant challenge in the packet-based communications environment.
Recommendation ITU-T G.1028 “End-to-end QoS for voice over 4G mobile networks” was developed by ITU’s standardization expert group for ‘performance, QoS and QoE’, ITU-T Study Group 12.
ITU-T G.1028 offers guidance on the factors impacting the end-to-end performance of “managed” voice applications over LTE networks and how the impacts of these factors should be assessed. The standard describes typical end-to-end scenarios involving LTE access, including scenarios where one of the parties connects using a wired or wireless access technology other than VoLTE.
These scenarios are based on typical reference connections defined in ITU-T G.1028, connections which are composed of segments including terminals, wireless access, backhaul networks and core networks. The standard also presents considerations relevant to the sharing of the budget of some key parameters, in addition providing the locations where these parameters can be assessed across the segments of VoLTE connections.