Timer 

Start 

Stop 

At expiry

T300 

Transmission of RRCConnectionRequest

Reception of RRCConnectionSetup or RRCConnectionReject message, cell re-selection and upon abortion of connection establishment by upper layers

Perform the actions as specified in 5.3.3.6

T301

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 to EUTRA 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 RRCconnection 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 RRCconnection 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

T310

Upon detecting physical layer problems i.e. upon receiving N310 consecutive out-of-sync indications from lower layers

Upon receiving N311 consecutive in-sync indications from lower layers, 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

Upon initiating the RRCconnection reestablishmentmprocedure

Selection of a suitable E-UTRA cell or a cell using another RAT.

Enter RRC_IDLE

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 information provided by dedicated signalling.

T321

Upon receiving measConfig including a reportConfig with the purpose set to reportCGI

Upon acquiring the information needed to set all fields of cellGlobalId for the requested cell, upon receiving measConfig that includes removal of the reportConfig with the purpose set to reportCGI

Initiate the measurement reporting procedure, stop performing the related measurements and remove the corresponding measId