-establishment request message (message 3) with cause value 'other failure' within the timer T311 still running, the T311timer is stopped and timer T301 started to supervise the RRC connection re-establishment message reception from the eNodeB. Then provided that RRC connection re-establishment is completed within T301 time the RRC connection is 3. T310 expires -> detection of radio link failure: all RBs are suspended except SRBO, the UE Tx turned off in 40 ms, the 6. The UE acquires UL grant via random access 1. The UE detects first out UE initiates RRC re-establishment process procedure and physical layer sends RRC of synchronization and searches for the best cell. T311 is started connection re-establishment request message 4. The UE finds suitable cell T310 running T311 running 7. The UE receives RRC connection 2. The UE detects N310 amount of 5. The UE acquired system information re-establishment message and timer out of synchronization -> the UE of the target cell. The UE layer 3 sends T301 is stopped. SRB1 is resumed starts timer T310 RRC connection re-establishment and layer 3 sends RRC connection message to the lower layers. T311 is re-establishment complete message stopped and T301 started to physical layer and procedure Figure 12.27 RRC connection re-establishment caused by T310 timer expiry LTE Small Cell Optimization considered to be successfully re-established and E-RAB is not dropped. It should be noted that RRC connection re-establishment is triggered only in case the UE is in RRC-connected state (active RRC connection exists) and security has been activated. And the RRC connection re-establishment succeeds only in case the target cell is prepared, that is, it has valid UE context and in case the target eNodeB accepts the RRC connection re-establishment SRB1 operation resumes while other RBs remain suspended until RRC connection re-establishment is successfully completed. In case the target eNodeB does not have the UE context then the RRC connection re-establishment is rejected (RRC connection re-e