# US 10,321,441 B2 · User terminal and radio communication method

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- Number: US 10,321,441 B2
- Document ID: US10321441B2
- Status: Granted
- Kind: B2
- Application number: 15/439,239
- Filed: 2017-02-22
- Published: 2017-06-08
- Granted: 2019-06-11
- Earliest claimed: 2012-09-28
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Yuichi Kakishima; Kazuaki Takeda; Yoshihisa Kishiyama
- Web page: https://patentgrep.com/patent/US10321441B2

## CPC

- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 27/2601: {Multicarrier modulation systems}
- H04W 52/146: {Uplink power control}
- H04W 52/32: TPC of broadcast or control channels
- H04W 52/325: {Power control of control or pilot channels}
- H04W 52/346: {distributing total power among users or channels}
- H04W 52/40: during macro-diversity or soft handoff
- H04W 56/00: Synchronisation arrangements
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 52/16: Deriving transmission power values from another channel
- H04W 52/343: {taking into account loading or congestion level}
- H04W 88/02: Terminal devices
- H04W 88/08: Access point devices
- 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

A user terminal includes a transmission section that transmits channels using a first cell and a second cell that belong to different cell groups, and a control section that, when a channel to be transmitted in the first cell and a channel to be transmitted in the second cell are same channels and channel transmission in the first cell overlaps at least partially in time with channel transmission in the second cell, preferentially allocates transmission power to one of the channel transmission in the first cell and the channel transmission in the second cell over the other.

## Claims

### Claim 1

A user terminal that communicates with a radio base station, comprising:
a transmission section that transmits channels using a first cell and a second cell that are different cells in which the user terminal applies Multiple Timing Advance (MTA); and
a control section that, when a parameter for a plurality of power control modes on the first and second cells is received from the radio base station by higher layer signaling and when channel transmission of a physical channel to be transmitted in the first cell overlaps at least partially in time with channel transmission of the physical channel to be transmitted in the second cell, preferentially allocates transmission power to one of the channel transmission in the first cell and the channel transmission in the second cell over the other.

### Claim 2 (depends on 1)

The user terminal according to claim 1, wherein the first cell is a PCell.

### Claim 3 (depends on 2)

The user terminal according to claim 2, wherein the control section controls the transmission section to prioritize PUCCH transmission in the PCell.

### Claim 4 (depends on 1)

The user terminal according to claim 1, wherein the physical channel is PUCCH.

### Claim 5 (depends on 1)

The user terminal according to claim 1, wherein the physical channel is PUSCH.

### Claim 6

A radio communication method in a user terminal that communicates with a radio base station, comprising:
transmitting channels using a first cell and a second cell that are different cells in which the user terminal applies Multiple Timing Advance (MTA); and
when a parameter for a plurality of power control modes on the first and second cells is received from the radio base station by higher layer signaling and when channel transmission of a physical channel to be transmitted in the first cell overlaps at least partially in time with channel transmission of the physical channel to be transmitted in the second cell, preferentially allocates transmission power to one of the channel transmission in the first cell and the channel transmission in the second cell over the other in the transmitting.