ue performs a random access procedure by using the at least one first random access preamble 502 with a first number of repetitions determined according to the first ce level e g 1 2 4 or 128 repetition s with the network then the ue determines a second ce level if the random access procedure is performed unsuccessfully e g the at least one first random access preamble 502 is retransmitted for a first maximum number of retransmission attempts the ue selects at least one second random access preamble 506 from a first subgroup 508 of a second preamble group 504 corresponding to the second ce level if u201c msg3 u201d is not transmitted by the ue the first subgroup 508 may be configured e g mapped for a ce level previously e g initially determined by the ue e g the first ce level the ue performs the random access procedure by using the at least one second random access preamble 506 further the ue determines a third ce level if the random access procedure is performed unsuccessfully e g the at least one second random access preamble 506 is retransmitted for a second maximum number of retransmission attempts the ue selects at least one third random access preamble 512 from a first subgroup 514 of the third preamble group 510 corresponding to.