LTE RRC Timers
|
Timer |
Start |
Stop |
At expiry |
|
T300 NOTE1 |
Transmission of RRCConnectionRequest
or RRCConnectionResumeRequest |
Reception of RRCConnectionSetup,
RRCConnectionReject or RRCConnectionResume message,
cell re-selection and upon abortion of connection establishment by upper
layers |
Perform the actions as specified in 5.3.3.6 |
|
T301 NOTE1 |
Transmission of RRCConnectionReestabilshmentRequest |
Reception of RRCConnectionReestablishment
or RRCConnectionReestablishmentReject
message as well as when the selected cell becomes unsuitable |
Go to RRC_IDLE |
|
T302 |
Reception of RRCConnectionReject
while performing RRC connection establishment |
Upon entering RRC_CONNECTED and upon cell re-selection |
Inform upper layers about barring alleviation as specified in 5.3.3.7 |
|
T303 |
Access barred while performing RRC connection establishment for mobile
originating calls |
Upon entering RRC_CONNECTED and upon cell re-selection |
Inform upper layers about barring alleviation as specified in 5.3.3.7 |
|
T304 |
Reception of RRCConnectionReconfiguration
message including the MobilityControl Info or reception of MobilityFromEUTRACommand
message including CellChangeOrder |
Criterion for successful completion of handover within E-UTRA, handover
to
E-UTRA or cell change order is met (the criterion is specified in the target
RAT in case of inter-RAT) |
In case of cell change order from E-UTRA or intra E-UTRA handover, initiate the
RRC connection re-establishment procedure; In case of handover to
E-UTRA, perform the actions defined in the specifications applicable for the source RAT. |
|
T305 |
Access barred while performing RRC connection establishment for mobile
originating signalling |
Upon entering RRC_CONNECTED and upon cell re-selection |
Inform upper layers about barring alleviation as specified in 5.3.3.7 |
|
T306 |
Access barred while performing RRC connection establishment for mobile
originating CS fallback. |
Upon entering RRC_CONNECTED and upon cell re-selection |
Inform upper layers about barring alleviation as specified in 5.3.3.7 |
|
T307 |
Reception of RRCConnectionReconfiguration
message including MobilityControlInfoSCG |
Successful completion of random access on the PSCell,
upon initiating re-establishment and upon SCG
release |
Inform E-UTRAN about the SCG change failure by initiating the SCG
failure information procedure as specified in 5.6.13. |
|
T308 |
Access barred due to ACDC while performing RRC connection establishment subject to
ACDC |
Upon entering RRC_CONNECTED and upon cell re-selection |
Inform upper layers about barring alleviation for ACDC as
specified in 5.3.3.7 |
|
T310 NOTE1 NOTE2 |
Upon detecting physical layer problems for the PCell
i.e. upon receiving N310 consecutive out-of-sync indications from lower
layers |
Upon receiving N311 consecutive in-sync indications from lower layers
for the PCell, upon triggering the handover
procedure and upon initiating the connection re-establishment procedure |
If security is not activated: go to RRC_IDLE else: initiate the
connection re-establishment procedure |
|
T311 NOTE1 |
Upon initiating the RRC connection
re-establishment procedure |
Selection of a suitable E-UTRA cell or a cell using another RAT. |
Enter RRC_IDLE |
|
T312 NOTE2 |
Upon triggering a measurement report for a measurement identity for
which T312 has been configured, while T310 is running |
Upon receiving N311 consecutive in-sync indications from lower layers,
upon triggering the handover procedure, upon initiating the connection re-establishment
procedure, and upon the expiry of T310 |
If security is not activated: go to RRC_IDLE else: initiate the
connection re-establishment procedure |
|
T313 NOTE2 |
Upon detecting physical layer problems for the PSCell
i.e. upon receiving N313 consecutive out-of-sync indications from lower
layers |
Upon receiving N314 consecutive in-sync indications from lower layers
for the PSCell, upon initiating the connection
re-establishment procedure, upon SCG release and upon receiving RRCConnectionReconfiguration
including MobilityControlInfoSCG |
Inform E-UTRAN about the SCG radio link failure by initiating the SCG
failure information procedure as specified in 5.6.13. |
|
T320 |
Upon receiving t320 or upon
cell (re)selection to E-UTRA from another RAT with validity time configured
for dedicated priorities (in which case the remaining validity time is applied). |
Upon entering RRC_CONNECTED, when PLMN selection is performed on
request by NAS, or upon cell (re)selection to another RAT (in which case the
timer is carried on to the other RAT). |
Discard the cell reselection priority |
|
T321 |
Upon receiving measConfig
including a reportConfig
with the purpose set to reportCGI |
Upon acquiring the |
Initiate
the measurement reporting procedure, stop performing the related measurements
and remove the corresponding measId |
|
T322 |
Upon receiving redirectedCarrierOffsetDedicated
included in RedirectedCarrierInfo |
Upon entering RRC_CONNECTED,
when PLMN selection is performed on request by NAS, or upon cell
(re)selection to another RAT. |
Release redirectedCarrierOffsetDedicated. |
|
T325 |
Timer (re)started upon receiving RRCConnectionReject message
with deprioritisationTimer. |
|
Stop deprioritisation of all frequencies or
E-UTRA signalled by RRCConnectionReject. |
|
T330 |
Upon receiving LoggedMeasurementConfiguration
message |
Upon log volume exceeding the suitable UE memory, upon initiating the
release of LoggedMeasurementConfiguration
procedure |
Perform the
actions specified in 5.6.6.4 |
|
T340 NOTE2 |
Upon transmitting UEAssistanceInformation
message with powerPrefIndication
set to normal |
Upon initiating the connection re-establishment procedure |
No action. |
|
T341 NOTE2 |
Upon transmitting UEAssistanceInformation message with bw-Preference. |
Upon resuming an RRC connection or upon initiating the
connection re-establishment procedure |
No action. |
|
T342 NOTE2 |
Upon transmitting DelayBudgetReport
message. |
Upon initiating the
connection re-establishment and connection resume procedures |
No action. |
|
T350 |
Upon entering RRC_IDLE if t350
has been received in wlan-OffloadInfo. |
Upon entering RRC_CONNECTED, or upon cell reselection. |
Perform the actions specified in 5.6.12.4. |
|
T351 |
Reception of RRCConnectionReconfiguration message including the associationTimer
in WLAN-MobilityConfig. |
Upon successful connection to WLAN, upon WLAN
connection failure, upon
leaving RRC_CONNECTED, upon triggering the handover procedure, or upon
initiating the connection re-establishment procedure. |
Perform WLAN Connection Status Reporting specified in
5.6.15.2. |
|
T360 |
Upon performing the
redistribution target selection as specified in TS 36.304 [4]. |
Upon entering RRC_CONNECTED, upon receiving a Paging message including
redistributionIndication; upon reselecting a cell not
belonging to the redistribution target. |
Stop
considering a frequency or cell to be redistribution target, and perform the redistribution
target selection if the
condition specified in TS 36.304 [4] is met. |
|
T370 |
Upon receiving SL-DiscConfig including a discSysInfoToReportConfig set
to setup. |
Upon initiating the transmission of SidelinkUEInformation including
discSysInfoReportFreqList,
upon receiving SL-DiscConfig
including discSysInfoToReportConfig
set to release, upon handover and
re-establishment. |
Release discSysInfoToReportConfig. |
|
T314 NOTE2 |
Upon early detecting
physical layer problems for the PCell i.e. upon
receiving N310 consecutive "early-out-of-sync" indications from
lower layers. |
Upon receiving N311 consecutive
in-sync indications from lower layers for the PCell,
upon triggering the handover procedure and upon initiating the connection
re-establishment procedure |
Initiate the UE
Assistance Information procedure to report early detection of physical layer
problems in accordance with 5.6.10. |
|
T315 NOTE2 |
Upon detecting physical
layer improvements of the PCell i.e. upon receiving
N311 consecutive "early-in-sync" indications from
lower layers. |
Upon receiving N310
consecutive "early-out-of-sync" indications from lower
layers for the PCell. |
Initiate the UE
Assistance Information procedure to report detection of physical layer
improvements in accordance with 5.6.10. |
|
T343 NOTE2 |
Upon transmitting UEAssistanceInformation message with RLM-Report including earlyOutOfSync. |
Upon initiating the
connection re-establishment procedure |
No action. |
|
T344 NOTE2 |
Upon transmitting UEAssistanceInformation message with RLM-Report including earlyInSync. |
Upon initiating the
connection re-establishment procedure |
No action. |
|
NOTE1: Only the timers marked with
"NOTE1" are applicable to NB-IoT. NOTE2: The behaviour as specified in 7.3.2 applies. |
|||
|
Constant |
Usage |
|
N310 |
Maximum number of consecutive "out-of-sync" or
"early-out-of-sync" indications for the PCell
received from lower layers |
|
N311 |
Maximum number of consecutive "in-sync" or
"early-in-sync" indications for the PCell
received from lower layers |
|
N313 |
Maximum number of consecutive "out-of-sync" indications for
the PSCell received from lower layers |
|
N314 |
Maximum number of consecutive "in-sync" indications for the PSCell received from lower layers |