LTE UE Timers:
LTE UE Constants:
Taken from 3GPP TS 36.331| 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 | Reset MAC and Mac configuration. Inform upper layers about the failure |
| 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 |
| T303 | Access barred while performing RRC connection establishment for mobile originating calls | Upon entering RRC_CONNECTED and upon cell re-selection | Inform upper layers |
| T304 | Reception of RRCConnectionReconfiguration message including the MobilityControl Info or | 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 RRC connection re-establishment procedure; In case of handover to E-UTRA, perform the actions defined in the specifications applicable for the source RAT. |
| reception of MobilityFromEUTRACommand message including CellChangeOrder | |||
| T305 | Access barred while performing RRC connection establishment for mobile originating signalling | Upon entering RRC_CONNECTED and upon cell re-selection | Inform upper layers |
| 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 RRC connection re-establishment procedure | 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 |
LTE UE Constants:
Constant
|
Usage
|
N310
| Maximum number of consecutive "out-of-sync" indications received from lower layers. Value in whole number |
N311
| Maximum number of consecutive "in-sync" indications received from lower layers. Value in whole number |