Random Access Procedure with Mobility

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• receive a first physical downlink control channel (PDCCH) order initiating a first random access (RA) procedure for a candidate cell for layer-1 or layer-2 triggered mobility (LTM) procedure;
• initialize a power ramping counter to a first value based on the first PDCCH order indicating initial preamble transmission;
• complete the first RA procedure after transmitting, via the candidate cell and for the first RA procedure, a first RA preamble using a first transmit power that is determined based on the first value;
• receive, after completing the first RA procedure, a second PDCCH order initiating a second RA procedure for the candidate cell;
• in response to receiving the second PDCCH order, initialize a preamble transmission counter;
• increment the power ramping counter from the first value to a second value based on the second PDCCH order indicating preamble retransmission;
• and
• transmit, via the candidate cell and for the second RA procedure, a second RA preamble using a second transmit power that is determined based on the second value.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

• receive a first physical downlink control channel (PDCCH) order initiating a first random access (RA) procedure for a candidate cell for layer-1 or layer-2 triggered mobility (LTM) procedure;
• initialize a power ramping counter to a first value based on the first PDCCH order indicating initial preamble transmission;
• complete the first RA procedure after transmitting, via the candidate cell and for the first RA procedure, a first RA preamble using a first transmit power that is determined based on the first value;
• receive, after completing the first RA procedure, a second PDCCH order initiating a second RA procedure for the candidate cell;
• in response to receiving the second PDCCH order, initialize a preamble transmission counter;
• increment the power ramping counter from the first value to a second value based on the second PDCCH order indicating preamble retransmission;
• and
• transmit, via the candidate cell and for the second RA procedure, a second RA preamble using a second transmit power that is determined based on the second value.