-
5G System Connection Management:
CM
-
Idle and
CM
-
Connected
5G
系统连接管理
:CM-
Idle
与
CM-Connected
October 21, 2019admin5G,
5G Network Architectures,
Call Flow,
Interviews,
NAS
Signalling,
New Radio,
Signaling,
Tech Fundas
When
a
Mobile
wants
to
communicate
with
5G
core
network,
as
it
first
time
switched
-
on
or
because it was
in
idle state
for some time and network removed the resources to
transfer data
temporarily, it needs to
establish a connection to the Access Management
Function (AMF). This is
known as
Connection Management.
当移动终端准备与
5G
核心网络通信
，
如终端首次接通或空闲态一段时间
（核心）
< br>网络移除
了终端数据后进行数据传输，就需要（重新）建立与
AMF
的连接。这就是连接管理；
Connection
Management
(CM)
is
used
to
establish
and
release
the
control
plane
signaling
connection between
UE and AMF.
连接管理
(
CM)
用于建立和释放
UE
与
AMF
之间的控制面信令连接。
1.
Characteristics
CM
定义
?
?
?
?
?
?
?
?
Connection
Management depicts UE status with respect to its
signalling with AMF
5G Core Node
Connection Management is used to
transfer NAS signalling messages
Signalling Connection between UE and
AMF is based on N1 logical interface and
it is combination of following
o
RRC signalling
between UE and gNB
o
N2-AP signalling between gNB and AMF
3GPP has defined two Connection
Management State w.r.t. UE and AMF
o
Connection
Management -Idle [CM-Idle]
o
Connection Management- Connected [CM-
Connected]
CM-Idle and CM-Connected
states are maintained at NAS layer at both UE and
AMF
连接管理描述了
UE
与
5G
核心网节点（
A
MF
）的信令连接状态
连接管理用于传输
NAS
信令消息
UE
与
AMF
信令连接基于
N1
逻辑接口，可合并在以下消息中：
?
UE
与<
/p>
gNB
之间
RRC
信令
?
?
gNB
与
AMF
之间
N2-AP
信令
；
3GPP
定义了两种连接管理状态
和
AMF
?
?
CM
-
Idle
CM
-
Connected
?
CM
-
Idle
和
CM
-
Connected
状态保存在
UE
和
AMF
的
NAS
层中；