e the target eNodeB allocates contention- free preamble and all preamble transmission parameters. In case the UE does not receive any preamble identification, it knows that it should use contention-based random access procedure for the handover procedure. Also contention-based preamble parameters are given to the UE for contention-based random access procedure (to be used in case contention-free preamble index is not given). Use of contention-based random access procedure instead of contention-free procedure for the handover procedure would increase the handover execution delay (the time between the UE receiving the RRC connection reconfiguration message from the source eNodeB/cell and the target eNodeB/cell receiving the RRC connection reconfiguration complete message). Message 3 HARQ transmission amount. Reference signal (RS) transmission power parameters. PUSCH parameters for supported hopping mode and uplink RS configuration. Target cell antenna configuration. UE maximum transmission power limit. Discontinuous reception (DRX) parameters. PUCCH resources for CQI, RI and SR reporting. Transmission mode and related possible code book restriction parameters. Ciphering and integrity protection algorithms and related parameters. After the UE has received the RRC Connection Reconfiguration message it releases the physical layer connection to the source cell (source eNodeB) and sends RRC Connection Reconfiguration Complete message to the target cell which in turn initiates the contention-free random access procedure towards the target cell (target eNodeB). It should be noted that according to [4] the UE does not need to acknowledge (HARQ or ARQ) the reception of RRC Connection Reconfiguration message (including mobility control information) but perform the handover without any delay. The preamble transmission power for handover signalling is defined by the UE in the same way as the preamble transmission power for RRC Connection Setup procedure. After transmit- ting the preamble the UE monitors the PDCCH DCIs using th