EP4277422

• Telefonaktiebolaget LM Ericssonsince Oct 13, 2023

A method implemented in a user terminal (20) for performing a random access procedure is presented. The method comprises transmitting a first random access request message including a random access preamble to a radio base station (18) using a random access channel, RACH, radio resource and receiving a second random access response message from the radio base station (18). The second random access response message indicates a timing change, an identified radio resource of an uplink shared channel, UL-SCH, and a temporary user terminal identity. The method also comprises adjusting a timing at the user terminal (20) for transmitting signals to the radio base station (18) based on the timing change indicated in the second random access response message and, based on the adjusted timing, transmitting a third message to the radio base station (18) over the identified radio resource of the uplink shared channel. The third message includes a user terminal identity that was assigned to the user terminal before the random access procedure is scrambled using a cell-associated scrambling sequence that is not terminal-specific. Further still, the method comprises receiving a fourth contention resolution message from the radio base station (18) to complete the random access procedure.