User equipment using random access channel (RACH) parameters to adjust transmit power, and method of using the RACH parameters to adjust transmit power

1. A user equipment, comprising:

a memory with computer-readable instructions; and

at least one first processor configured to read the computer-readable instructions, the at least one first processor being configured to,

receive a broadcast message, the broadcast message including random access channel, RACH, parameters,

transmit a first message following receipt of the broadcast message, the first message including RACH preambles,

receive a second message, the second message being an acknowledgement message that acknowledges receipt of the first message,

transmit a third message based on a successful transmission of the first message, the third message including noise rise information, preamble miss information and power settings for the user equipment, the power settings including power information used to transmit the third message,

receive a fourth message, the fourth message including contention resolution information that adjusts the RACH parameters based on the noise rise information and the preamble miss information,

decode RACH parameters and the contention resolution information to obtain decoded RACH parameters, and

adjust the initial transmit power of the user equipment to be a first transmit power based on the decoded RACH parameters.

2. The user equipment of claim 1 , wherein the at least one first processor being is further configured to,

perform an initial cell synchronization process with a first network node prior to receiving the broadcast message.

3. The user equipment of claim 1 , wherein the at least one first processor being is further configured to,

increase the initial transmit power of the user equipment to be a second transmit power based on the decoded RACH parameters.

4. The user equipment of claim 1 , wherein the RACH parameters include at least one of an initial RACH target receive power and a RACH power ramp-up.

5. A method performed by a user equipment, comprising:

receiving, by at least one first processor of the user equipment, a broadcast message, the broadcast message including random access channel, RACH, parameters;

transmitting, by the at least one first processor, a first message following receipt of the broadcast message, the first message including RACH preambles;

receiving, by the at least one first processor, a second message, the second message being an acknowledgement message that acknowledges receipt of the first message;

transmitting, by the at least one first processor, a third message based on a successful transmission of the first message, the third message including noise rise information, preamble miss information and power settings for the user equipment, the power settings including power information used to transmit the third message;

receiving, by the at least one first processor, a fourth message, the fourth message including contention resolution information that adjusts the RACH parameters based on the noise rise information and the preamble miss information;

decoding, by the at least one first processor, RACH parameters and the contention resolution information to obtain decoded RACH parameters; and

adjusting, by the at least one first processor, an initial transmit power of the user equipment to be a first transmit power based on the decoded RACH parameters.

6. The method of claim 5 , further comprising:

performing an initial cell synchronization process with a first network node prior to receiving the broadcast message.

7. The method of claim 5 , further comprising:

increasing the initial transmit power of the user equipment to be a second transmit power based on the decoded RACH parameters.

8. The method of claim 5 , wherein the RACH parameters include at least one of an initial RACH target receive power and a RACH power ramp-up.