13.1 Timers for UE

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

Timer

Start

Stop

At expiry

T300

Transmission of RRC CONNECTION REQUEST in case of connection establishment for reasons other than MBMS reception

Reception of RRC CONNECTION SETUP

Retransmit RRC CONNECTION REQUEST if V300 =< N300, else go to Idle mode

T302

Transmission of CELL UPDATE/URA UPDATE

Reception of CELL UPDATE CONFIRM/URA UPDATE CONFIRM

Retransmit CELL UPDATE/URA UPDATE if V302 =< N302, else, go to Idle mode

T304

Transmission of UE CAPABILITY INFORMATION

Reception of UE CAPABILITY INFORMATION CONFIRM

Retransmit UE CAPABILITY INFORMATION if V304 =< N304, else initiate a cell update procedure

T305

Entering CELL_FACH or URA_PCH or CELL_PCH state. Reception of CELL UPDATE CONFIRM/URA UPDATE CONFIRM.

Entering another state.

Transmit CELL UPDATE if T307 is not activated and the UE detects "in service area". Otherwise, if T307 is not active, start T307.

T307

When the timer T305 has expired and the UE detects "out of service area".

When the UE detects "in service area".

Transit to idle mode

T308

Transmission of RRC CONNECTION RELEASE COMPLETE

Not stopped

Transmit RRC CONNECTION RELEASE COMPLETE if V308 <=N308, else go to idle mode.

T309

Upon reception of CELL CHANGE ORDER FROM UTRAN message

Successful response to a connection establishment request in the new cell.

Resume the connection to UTRAN

T310

Transmission of PUSCH CAPACITY REQUEST

Reception of PHYSICAL SHARED CHANNEL ALLOCATION

Transmit PUSCH CAPACITY REQUEST if V310 =< N310, else procedure stops.

T311

Reception of PHYSICAL SHARED CHANNEL ALLOCATION message with the CHOICE "PUSCH allocation" set to "PUSCH allocation pending".

Reception of PHYSICAL SHARED CHANNEL ALLOCATION message with CHOICE "PUSCH allocation" set to "PUSCH allocation assignment".

UE may initiate a PUSCH capacity request procedure.

T312

When the UE starts to establish dedicated CH. For 1.28 Mcps TDD, it can also apply for physical shared channel establishment.

For FDD, timer T312 runs independently for the downlink frequency associated with the primary uplink frequency and for the downlink frequency associated with the secondary uplink frequency.

When the UE detects N312 "in sync" indication from L1.

The criteria for physical channel establishment failure is fulfilled

T313

When the UE detects consecutive N313 "out of sync" indication from L1.

For FDD, timer T313 runs independently for the downlink frequency associated with the primary uplink frequency and for the downlink frequency associated with the secondary uplink frequency.

When the UE detects consecutive N315 "in sync" indication from L1.

The criteria for Radio Link failure is fulfilled.

T314

When the criteria for radio link failure are fulfilled.

The timer is started if radio bearer(s) that are associated with T314 exist or if only RRC connection exists only to the CS domain.

When the Cell Update procedure has been completed.

See subclause 8.3.1.13.

T315

When the criteria for radio link failure are fulfilled.

The timer is started only if radio bearer(s) that are associated with T315 exist or if RRC connection exists to PS domain.

When the Cell Update procedure has been completed.

See subclause 8.3.1.14.

T316

When the UE detects "out of service area" in URA_PCH or CELL_PCH state

When the UE detects "in service area".

Initiate cell update procedure if in service area is detected. Otherwise start timer T317, transit to CELL_FACH state and initiate cell update procedure when the UE detects "in service area".

T317

When the T316 expires or when in CELL_FACH state, the UE detects "out of service area".

When the UE detects "in service area".

T317 never expires.

T318

Transmission of RRC CONNECTION REQUEST in case of connection establishment for MBMS reception

Reception of RRC CONNECTION SETUP

Enter idle mode

T319

When entering CELL_PCH or URA_PCH.

When leaving CELL_PCH or URA_PCH state.

The UE activates starts the DRX cycle based on “DRX cycle length coefficient”.

T320

When receiving the CELL UPDATE CONFIRM message with IE “Wait time” and IE “RRC State Indicator” set to the value “CELL_PCH” or “URA_PCH”.

When initiating the cell update or URA update procedure, see subclause 8.3.1.2.

See subclause 8.3.1.16.

T321

See subclause 8.5.49.

See subclause 8.5.49.

See subclause 8.5.49.

T322

When received in UTRAN MOBILITY INFORMATION message in the IE “Dedicated Priority Information” or upon cell (re)selection to UTRA from another RAT with validity time configured for dedicated priorities (in which case the remaining validity time is applied).

When dedicated priorities are cleared, when new dedicated priorities are received, 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).

See subclause 8.3.3.7

T323

When transmitting a SIGNALLING CONNECTION RELEASE INDICATION message including the IE "Signalling Connection Release Indication Cause"

See subclauses 8.2.2.3, 8.3.1.6, and 8.5.2.

See subclause 8.1.14.4

T324

When a measurement report is triggered by intra frequency event 1d and the table "Target cell preconfigurations" in the variable TARGET_CELL_PRECONFIGURATION includes the cell that triggered the event or, when a measurement report is triggered by intra frequency

event 1c requesting the serving HS-DSCH cell change and the table "Target cell preconfigurations" in the variable TARGET_CELL_PRECONFIGURATION includes the new best cell that reported in this event 1c report, and an Activation time offset equal to 0 is configured

Upon successful reception of a Target cell HS-SCCH order or after 4 seconds or upon reception of any RRC reconfiguration message or ACTIVE SET UPDATE message

Stop monitoring target cell HS-SCCH

T326

Upon receiving LOGGING MEASUREMENT CONFIGURATION including the Logged Measurements Configuration Info

Upon reception of a new LOGGING MEASUREMENT CONFIGURATION or upon log volume exceeding the available UE memory.

See subclause 8.5.63.4

T327

Upon receiving LOGGING MEASUREMENT CONFIGURATION including the Logged ANR Configuration Info

When reaching the maximum number of entries in the LOG_ ANR_REPORT_VARIABLE or the ANR logging info is reported to the network.

See subclause 8.5.63.5

T328

If HS-DSCH DRX in CELL_FACH with 2-level DRX is configured: Upon release of the common E-DCH resource or upon Fallback to R99 PRACH transmission termination, or upon HS-SCCH reception when no common E-DCH resource is allocated.

Upon allocation of a common E-DCH resource or upon initiation of Fallback to R99 PRACH transmission.

See subclause 8.5.49b

T329

If HS-DSCH DRX in CELL_FACH with 1-level DRX is configured: Upon release of the common E-DCH resource or upon Fallback to R99 PRACH transmission termination, or upon HS-SCCH reception when no common E-DCH resource is allocated.

If HS-DSCH DRX in CELL_FACH with 2-level DRX is configured: upon expiry of T328.

Upon allocation of a common E-DCH resource, or upon initiation of Fallback to R99 PRACH transmission. If HS-DSCH DRX in CELL_FACH with 2-level DRX is configured: Upon HS-SCCH reception when no common E-DCH resource is allocated.

See subclause 8.5.49b

T330

When entering Idle mode, CELL_PCH or URA_PCH and the variable WLAN_OFFLOAD_INFO is not empty.

When entering CELL_FACH or CELL_DCH state, or upon cell reselection.

See subclause 8.6.7.30

T331

When upper layers indicate T331 timer value is received, see subcause 8.6.1.4.

When upper layers indicate no T331 timer value is received, see subclause 8.6.1.4.

See subclause 8.6.1.4.1

T332

When the T331 expires and T332 is configured, see subclause 8.6.1.4.

When upper layers indicate T332 timer value is configured or no T332 timer value is received, see subclause 8.6.1.4.

See subclause 8.6.1.4.2

T333

See subclause 8.5.89

Whenever variable HS-SCCH_DRX_CELL_FACH_STATUS operation is set to FALSE.

See subclause 8.5.89