Method and apparatus for multiple preamble random access power control

A method for a user equipment (UE) performing random access in a wireless network, the method comprising:

• sending, to the wireless network in a first random access procedure, multiple preambles over respective K1 and K2 time-frequency resources at a first transmission power range, wherein a last preamble sent over the K2 time frequency resources is the last preamble sent in the first random access procedure;
• determining a random access response (RAR) including uplink resources has not been successfully received from the wireless network in response to sending the multiple preambles;
• updating a preamble power ramping counter;
• and
• sending one or more additional random access preambles over determined time-frequency resources, at an increased second transmission power based on the preamble power ramping counter, until the RAR with the uplink resources is successfully received in a configured window of time or not.

A user equipment (UE) comprising:

• a transmitter;
• a receiver;
• and
• a processor coupled to the transmitter and the receiver, wherein the transmitter, the processor and the processor are configured to:
• send, to the wireless network in a first random access procedure, multiple preambles over respective K1 and K2 time-frequency resources at a first transmission power range, wherein a last preamble sent over the K2 time frequency resources is the last preamble sent in the first random access procedure;
• determine a random access response (RAR) including uplink resources has not been successfully received from the wireless network in response to sending the multiple preambles;
• update a preamble power ramping counter;
• and
• send one or more additional random access preambles over determined time-frequency resources, at an increased second transmission power based on the preamble power ramping counter, until the RAR including the uplink resources is successfully received. in a configured window of time or not.