# US 2018/0324706 A1 · Apparatus and method for controlling uplink transmission power in a multiple element carrier wave system

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- Number: US 2018/0324706 A1
- Document ID: US20180324706A1
- Status: Published application
- Kind: A1
- Application number: 16/028,609
- Filed: 2018-07-06
- Published: 2018-11-08
- Earliest claimed: 2011-11-15
- Assignees: Goldpeak Innovations Inc
- Applicants: Goldpeak Innovations Inc
- Inventors: Ki Bum KWON; Myung Cheul JUNG; Jae Hyun AHN
- Web page: https://patentgrep.com/patent/US20180324706A1

## CPC

- H04W 52/146: {Uplink power control}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04W 52/281: {taking into account user or data type priority}
- H04W 52/40: during macro-diversity or soft handoff
- H04W 52/50: at the moment of starting communication in a multiple access environment
- H04W 72/1268: of uplink data flows
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W 52/241: {taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo}
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W 52/365: {Power headroom reporting}
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- Y02D 30/70: in wireless communication networks
- 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)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

The present invention relates to an apparatus and method for controlling uplink transmission power in a multiple element carrier wave system. The method for controlling uplink transmission power by a terminal is a multiple element carrier wave system includes the steps of: generating an uplink signal to the transmitted in a first serving cell; receiving, from a base station, random access start information for commanding the start of a random access procedure for a second serving cell; calculating the estimated surplus power from first transmission power scheduled for an uplink signal transmission, and second transmission power scheduled for a transmission of a PRACH to which a random access preamble is mapped; and when the estimated surplus power is smaller than a threshold power, adjusting the first transmission power or the second transmission power on the basis of power allocation priority.

## Claims

### Claim 1

A method for controlling uplink power by a user equipment, comprising: generating at least one uplink channel to be transmitted on first cell and a physical random access channel (PRACH) to be transmitted on second cell;
estimating uplink power left based on both a first uplink power for transmitting at least one uplink channel and a second uplink power for transmitting a physical random access channel (PRACH) to which a random access preamble is mapped;
adjusting the first uplink power for transmitting the at least one uplink channel if the uplink power left is lower than threshold; and
transmitting, to the base station, the at least one of the uplink channel and the PRACH at the same time based on the adjusted first uplink power.

### Claim at position 2

2-18. (canceled)