LTE: Japan: SoftBank Mobile Selects Ericsson's Voice over LTE (VoLTE)
Japan's
SoftBank Mobile has selected Ericsson to provide and integrate its
end-to-end network solution for voice over LTE (VoLTE). With VoLTE as a
basis, consumers will get HD voice and video calling alongside other
telephony services, while using simultaneous LTE data services on LTE
smartphones.
The
VoLTE infrastructure will also enable additional new enriched
communication services, and will serve as the basis for SoftBank's
future network virtualization plans and Telecom Cloud introduction.
Ericsson
is upgrading SoftBank Mobile's existing mobile core network (Ericsson
Mobile Softswitch Solution and Evolved Packet Core) with a complete IMS
core, which includes the Multimedia Telephony Application Server (MTAS).
SoftBank Mobile's Ericsson-based LTE network is also being upgraded
with new VoLTE software.
Until
nationwide LTE coverage is deployed, seamless handover of ongoing voice
calls from LTE to WCDMA is needed to ensure uninterrupted voice services
as the user moves out of LTE coverage. Ericsson will also deploy this
end-to-end network handover functionality, SRVCC (Single Radio Voice
Call Continuity).
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