age to the lower layers. T311 is re-establishment complete message maxRetxThreshold: t8) stopped and T301 started to physical layer and procedure Figure 12.28 RRC connection re-establishment caused by UE reaching max number of RLC retransmissions Handover Failure and Timer T304 Expiry In case the UE receives the RRC connection reconfiguration message containing mobility control information element from the source cell and the UE can comply with the given configuration, the UE will start the timer T304 to supervise handover procedure completion. should be noted that the timer T304 [4] value should be set SO that it contains the random access procedure and all related reattempts time as shown in Figure 12.29. After the T304 expiry the UE detects radio link failure and initiates the RRC connection re-establishment procedure the same way as in the case of T310 expiry. In case of T304 expiry the RRC connection re-establishment cause value is set to handover failure. As mentioned above the value of T304 should be set SO that it covers the random access procedure and all related retransmissions but on the other hand the value of T304 should not be too long as then the re-establishment procedure cannot be initiated early and recovery from handover failure takes long time. Typical value of intra-LTE T304 is 1000 ms. 3. In case T304 expires before the UE can success fully complete the random access 1. RRC connection procedure the UE detects radio link failure reconfiguration message with and starts T311: all RBs are suspended 6. The UE acquires UL grant via mobilityInfo IE included received from the source cell and the UE is except SRBO, the UE Tx turned off in random access procedure and 40 ms, UE initiates RRC re-establishment physical layer sends RRC connection able to comply with configuration process and searches for the best cell re-establishment request message included into the message T304 is started by the UE 4. The UE finds suitable cell T304 running T311 running 7. The UE receives RRC connection 2. T304 running