【資料名稱】：qualcom VoLTE with SRVCC-white-paper

【資料作者】：qualcom

【資料日期】：2012

【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡介】：

The 3 phases of LTE voice and
communication services evolution
The handling of voice traffic on LTE handsets is
evolving as the mobile industry infrastructure evolves
toward higher—eventually ubiquitous—LTE availability.
This voice evolution can be characterized into three
major phases, summarized in Figure 2.
In the first phase, currently under way, all voice traffic
is handled by legacy Circuit-Switched (CS) networks,
while data traffic is handled by LTE Packet-Switched
(PS) networks—when and where available—and by
legacy networks in non-LTE areas