ell C in decibels and is calculated as: eNodeB-transmitted reference signal transmission power (delivered to the UE in system information block type 2) - RSRP (measured and filtered by UE); a(j) is the path-loss compensation and is set to 1 for message 3 transmission, that is, full path-loss compensation; rampup = the total power ramp-up from the first to the last preamble, that is, the total power ramping until the preamble is acknowledged by the RA response; ^msg2 is given by the eNodeB in the random access response message; rampup forms the closed-loop part of the power control formula above and it should be noted that f(0), that is, initial value of the closed-loop part is defined as msg2 ^Prampup Message 3 power level, therefore, depends on the preamble transmissions in terms of rampup and power offsets given by the eNodeB (APREAMBLE_Msg3 and Amsg2). eNodeB fails to decode message 3 (and sends NACK) because selected MCS and number of PRBs were too high compared to the allocated UE transmission power, the UE retransmits message 3 (hybrid automatic repeat request, HARQ retransmissions). Retransmissions are done using MCS and number of PRBs given in uplink grant in random access response. Message 3 HARQ retransmissions are done until maximum allowed number is reached (given in system information block type 2) after which the UE starts the random access procedure from the beginning by selecting a new preamble at increased power level. Also in case the eNodeB does not hear message 3 at all and there is no NACK (nor ACK) or message 4 received by the UE until contention resolution timer expiry, the UE starts the random access procedure from the beginning by selecting a new preamble at increased power level. These preamble retransmissions further increase the UE PUSCH transmission power for message 3 and in case of cumulative closed-loop power control, for all coming PUSCH transmissions. Also additional PDCCH and PDSCH resources are needed for message 2 transmissions. Hence, it is very important that as many as poss