NB-IoT Module Series
BC26 AT Commands Manual
BC26_AT_Commands_Manual 16 / 73
2.8. AT+CEREG EPS Network Registration Status
The set command controls the presentation of an unsolicited result code (URC) “+CEREG:<stat>” when
<n>=1 and there is a change in the MT's EPS network registration status in E-UTRAN, or unsolicited
result code “
+CEREG:<st
at>[,[<t
ac>],[<ci>],[
<AcT>]]” w
hen <n>=2 and t
here is a chan
ge of the
network
cell in E-UT
RAN.
The p
aramet
ers <AcT>,
<tac>
and <ci>
are provid
ed only
if available.
The v
alue <n>
=3
further extends the unsolicited result code with [,<cause_type>,<reject_cause>], when available, when
the value of <stat> changes.
If the UE requests PSM for reducing its power consumption, the set command controls the presentation of
an unsolicited result code: “+CEREG:<stat>[,[<tac>],[<ci>],[<AcT>][,[<cause_type>],[<reject_cause>][,
[<Active-T
ime>],[<Periodi
c-
TAU>]]]]”.
When <n>=4, the unsolicited result code will provide the UE with additional information for the active time
value and the extended periodic TAU value if there is a change of the network cell in E-UTRAN. The value
<n>=5 further enhances the unsolicited result code with <cause_type> and <reject_cause> when the
value of <
stat>
changes.
The p
arameter
s <AcT>,
<t
ac>, <ci>,
<cause_ty
pe>, <reject_caus
e>,
<Active-T
ime> and <Per
iodic-T
AU> ar
e provide
d only
if available.
The read command returns the status of result code presentation and an integer <stat> which shows
whether the network has currently indicated the registration of the MT. Location information elements
<tac>
, <ci> and <Ac
T>, if
available,
are returned o
nly w
hen <n>=2 and M
T is r
egistered on the
networ
k.
The parameters [,<cause_type>,<reject_cause>], if available, are returned when <n>=3.
The test command returns supported parameter values.
AT+CEREG EPS Network Registration Status
Write Command
AT+CEREG=[<n>]
Response
OK
If there is any error, response:
+CME ERROR:<err>
Response
When <n>=0, 1, 2 or 3 and command is executed
successfully:
+CEREG
:<n>,<st
at>[,[
<t
ac>],[
<ci>],[<A
cT>[,<cause_ty
pe>
,<reject_ cause>]]]
When <n>=4 or 5 and command is executed successfully:
+CEREG
:<n>,<st
at>[,[
<lac>],[<
ci>],[<A
cT>],[<rac>]
[,[<cau
se_type>
],[<reject_cau
se>][,
[<A
ctive-Time>
],[<Periodic-
T
AU>]]]]
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