VoLTE网络结构最新标准
VoLTE（Voice
over
LongTerm
Evolution）是一种在LTE网络上实现高质量语音通话的技术。它基于IP多媒体子系统（IMS）网络，将语音服务的控制和媒体层面作为数据流在LTE数据承载网络中传输。以下是关于VoLTE网络结构的最新标准的相关信息。
VoLTE业务的网络技术要求是根据3GPP的相关规范制定的。最新的标准包括统一IMS网络（第二阶段）支持VoLTE的网络技术要求和业务技术要求。这些标准是由中国电信集团有限公司、中国联合网络通信集团有限公司、中国信息通信研究院等多家单位共同起草的。
VoLTE业务流程是另一项重要的标准，它详细描述了用户注册、鉴权、呼叫流程等各个环节的操作。这份标准可以帮助网络运营商和设备制造商确保他们的系统能够正确处理VoLTE业务。
There
are
84
VoLTE
specifications
defined
by
the
3GPP,
which
cover
various
aspects
of
the
technology,
including
EPC
attachment流程,
NAS消息构成,
S6a
interface及消息构成,
GTPv2
interface及消息构成,
Gx接口及消息构成,
and
more.
The
VoLTE
network
architecture
includes
multiple
network
entities
that
work
together
to
provide
the
service.These
entities
are
responsible
for
functions
such
as
media
service,
eSRVCC
switching,
interconnection
with
other
IMS
and
traditional
voice
networks,
and
more.
VoLTE
supports
a
range
of
basic
and
supplementary
voice
and
data
services,
including
multimedia
phone
calls,
speech
conferences,
video
conferences,
and
short
message互通功能
between
the
IMS
domain
and
the
CS
domain。
QoS保障
VoLTE
uses
Quality
of
Service
(QoS)
mechani***s
to
ensure
that
voice
calls
are
prioritized
and
have
sufficient
resources
to
maintain
a
high
level
of
quality.This
includes
the
use
of
different
QoS
classes
for
different
types
of
traffic,
such
as
default
bearer,
