Random access initialization during mobility

Abstract

A method can include receiving, by a wireless device via a first cell, a first physical downlink control channel (PDCCH) order initiating a first random access (RA) procedure on a second cell. The method can also include transmitting a first RA preamble, for the first RA procedure, using a preamble power ramping counter. The method can further include receiving, after the first RA procedure is complete, a second PDCCH order initiating a second RA procedure on a third cell. The method can additionally include, in response to initiating the second RA procedure on the third cell, initializing, based on the second cell and the third cell being different, the preamble power ramping counter with an initial value. The method can also include transmitting, after initializing the preamble power ramping counter, a second random access preamble, for the second RA procedure, via the third cell.