NB-IoT Signaling
R&S
®
CMW-KM300/-KS300
17
User Manual 1178.5689.02 ─ 06
PS state
Description
"Attached"
Synchronization and attach have been performed.
There is no radio resource control (RRC) connection (RRC state = idle).
"Connection
Established"
An RRC connection has been established (RRC state = connected).
User data can be exchanged. The R&S
CMW can vary connection parameters and per-
form transmitter or receiver tests.
Note that short RRC idle periods are possible without a PS state change, for example, for
redirection.
State transitions can be initiated by the instrument or by the UE. The transitions
between "Cell On" and "Connection Established" depend on whether the setting "Keep
RRC Connection" is enabled, or not. The following figure provides an overview.
Cell On
Connection
Established
Connect
Detach
Attached
Cell On
Cell Off
Connection
Established
Detach
ON
Attached
OFF
Disconnect
Cell Off
ON
OFF
Keep RRC Connection
Keep RRC Connection
Connect
SMS
SMS
SMS
SMS
Disconnect
Figure 2-2: PS state transitions with and without Keep RRC Connection
Dotted line = Action initiated by instrument
Dashed line = Action initiated by UE
In addition to the main states shown in the table and the figure, the instrument indi-
cates the following transitory states:
●
"Signaling in Progress"
For example, displayed during the attach procedure.
●
"Connection in Progress"
Displayed during connection setup.
●
"Sending Message"
Displayed while an SMS message is sent to the MS.
●
"Receiving Message"
Displayed while an SMS message is received from the MS. To check the received
message, see
Chapter 2.3.12.2, "Incoming SMS"
●
"Disconnect in Progress"
General Description
深圳德标仪器
135-1095-0799
