U.S. carrier T-Mobile has launched Voice over LTE (VoLTE) service in the Seattle area. Operator is initially offering VoLTE service over existing LG G Flex and Samsung Galaxy Note 3 and Galaxy Light devices.
Nokia Solutions and Networks has launched voice call continuity (VCC) to complement Voice over LTE (VoLTE) by enabling seamless handovers to 2G or 3G networks. According to company, the enhanced solution optimizes VoLTE network connection quality and control with better bearer switching and shorter delay.
Along with LTE introduction, 3GPP also standardized Single Radio Voice Call Continuity (SRVCC) in Release 8 specifications to provide seamless continuity when an UE handovers from LTE coverage (E-UTRAN) to UMTS/GSM coverage (UTRAN/GERAN).
Huawei has completed end-to-end VoLTE voice call with eSRVCC (Enhanced Single Radio Voice Call Continuity, defined in 3GPP R10) handover without any perceivable interruption for the end user, company announced.