# US 2019/0174553 A1 · User equipment using random access channel (rach) parameters to adjust transmit power, and method of using the rach parameters to adjust transmit power

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0174553 A1
- Document ID: US20190174553A1
- Status: Published application
- Kind: A1
- Application number: 16/312,628
- Filed: 2017-06-05
- Published: 2019-06-06
- Earliest claimed: 2016-06-24
- Assignees: Alcetel-Lucent USA Inc.
- Applicants: Alcetel-Lucent USA Inc.
- Inventors: Marcos TAVARES; Dirck UPTEGROVE; Dragan SAMARDZIJA
- Web page: https://patentgrep.com/patent/US20190174553A1

## CPC

- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/2663: {Coarse synchronisation, e.g. by correlation}
- H04W 28/02: Traffic management, e.g. flow control or congestion control
- H04L 7/042: {Detectors therefor, e.g. correlators, state machines (digital correlators in general G06F17/15)}
- H04W 74/002: {Transmission of channel access control information}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The user equipment includes a processor configured to receive a broadcast message, the broadcast message including RACH parameters. The processor transmits a first message following receipt of the broadcast message. The processor receives a second message. The processor transmits a third message, the third message including power settings based on a successful transmission of the first message, and receives a fourth message, the fourth message including contention resolution information that adjusts the RACH parameters. The user equipment decodes RACH parameters and the contention information to obtain decoded RACH parameters, and adjusts an initial transmit power of the user equipment to be a first transmit power based on the decoded RACH parameters.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

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, the third message including power settings based on a successful transmission of the first message,
receive a fourth message, the fourth message including contention resolution information that adjusts the RACH parameters,
decode RACH parameters and the contention resolution information to obtain decoded RACH parameters, and
adjust an initial transmit power of the user equipment to be a first transmit power based on the decoded RACH parameters.

### Claim 12 (depends on 11)

The user equipment of claim 11, 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.

### Claim 13 (depends on 11)

The user equipment of claim 11, 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.

### Claim 14 (depends on 11)

The user equipment of claim 11, wherein the RACH parameters include at least one of an initial RACH target receive power and a RACH power ramp-up.

### Claim 15

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, the third message including power settings based on a successful transmission of the first message;
receiving, by the at least one first processor, a fourth message, the fourth message including contention resolution information that adjusts the RACH parameters;
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.

### Claim 16 (depends on 15)

The method of claim 15, further comprising:
performing an initial cell synchronization process with a first network node prior to receiving the broadcast message.

### Claim 17 (depends on 15)

The method of claim 15, further comprising:
increasing the initial transmit power of the user equipment to be a second transmit power based on the decoded RACH parameters.

### Claim 18 (depends on 15)

The method of claim 15, wherein the RACH parameters include at least one of an initial RACH target receive power and a RACH power ramp-up.