# US 9,439,154 B2 · Power control method, user equipment, and base station for carrier aggregation with different configurations

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- Number: US 9,439,154 B2
- Document ID: US9439154B2
- Status: Granted
- Kind: B2
- Application number: 14/039,569
- Filed: 2013-09-27
- Published: 2014-01-23
- Granted: 2016-09-06
- Earliest claimed: 2011-03-29
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Xingwei Zhang; Yongxia Lv; Lei Guan
- Web page: https://patentgrep.com/patent/US9439154B2

## CPC

- H04W 52/221: {using past power control commands}
- H04W 52/325: {Power control of control or pilot channels}
- H04W 52/146: {Uplink power control}
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Embodiments of the present invention disclose a power control method, a user equipment, and a base station. The method according to an embodiment of the present invention includes the following: a user equipment UE receives a transmitter power control TPC command sent by a base station, where the TPC command is used to indicate a power adjustment value of one carrier; and if the UE does not send a physical uplink control channel PUCCH in a previous uplink subframe of a current uplink subframe of the one carrier, performing, by the UE, according to a PUCCH transmit power used when the UE sends a latest PUCCH from among multiple carriers and the power adjustment value, TPC accumulation to obtain an updated PUCCH transmit power of the one carrier, where the multiple carriers include the one carrier.

## Claims

### Claim 1

A power control method, comprising:
receiving, by a user equipment (UE), a transmitter power control (TPC) command sent by a base station, wherein the TPC command is used to indicate a power adjustment value of one carrier;
if the UE does not send a physical uplink control channel (PUCCH) in a previous uplink subframe of a current uplink subframe of the one carrier, performing, by the UE, according to a PUCCH transmit power used when the UE sends a latest PUCCH from among multiple carriers and the power adjustment value, TPC accumulation to obtain an updated PUCCH transmit power of the one carrier, wherein the multiple carriers comprise the one carrier;
adjusting a transmit power of the one carrier according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising:
receiving, by the UE, radio resource control RRC signaling sent by the base station, wherein the RRC signaling comprises a TPC group identifier; and
querying, by the UE, a power adjustment value set according to the TPC group identifier.

### Claim 3 (depends on 2)

The method according to claim 2, further comprising:
for each carrier, calculating, by the UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference; and
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier.

### Claim 4 (depends on 2)

The method according to claim 2, wherein the power adjustment value set is a default power adjustment value set or an extended power adjustment value set.

### Claim 5

A power control method, comprising:
if a base station does not receive, in a previous uplink subframe of a current uplink subframe on one carrier, a physical uplink control channel (PUCCH) sent by a user equipment UE, determining, by the base station, according to a PUCCH transmit power used when the UE sends a latest PUCCH from among multiple carriers, a power adjustment value of the one carrier, wherein the multiple carriers comprise the one carrier;
generating, by the base station, a transmitter power control (TPC) command that carries the power adjustment value of the one carrier;
sending, by the base station, the TPC command to the UE, to notify the UE of the power adjustment value of the one carrier; and
adjusting a transmit power of the one carrier according to the power adjustment value;
for each carrier, calculating, by the UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 6 (depends on 5)

The method according to claim 5, further comprising:
determining, by the base station, a TPC group identifier, wherein the TPC group identifier is used to indicate a power adjustment value set; and
sending, by the base station, radio resource control (RRC) signaling that carries the TPC group identifier to the UE, so that the UE queries a corresponding power adjustment value set according to the TPC group identifier, and acquires, according to the TPC command, the power adjustment value in the found power adjustment value set to perform power control.

### Claim 7

A power control method, comprising:
receiving, by a user equipment (UE), a transmitter power control (TPC) command sent by a base station, wherein the TPC command is used to indicate a power adjustment value of a secondary component carrier (SCC);
performing, by the UE, according to a PUCCH transmit power used when a latest physical uplink control channel (PUCCH) is sent on the SCC and the power adjustment value, TPC accumulation to obtain an updated PUCCH transmit power of the SCC; and
adjusting a transmit power of the SCC according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 8 (depends on 7)

The method according to claim 7, further comprising:
receiving, by the UE, radio resource control (RRC) signaling that carries a TPC group identifier sent from the base station,
querying, by the UE, a corresponding power adjustment value set according to the TPC group identifier; and
acquiring, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 9

A power control method, comprising:
determining, by a base station, according to a physical uplink control channel (PUCCH)transmit power used when a user equipment (UE) sends a latest PUCCH on a secondary component carrier (SCC), a power adjustment value of the SCC;
generating, by the base station, a transmitter power control (TPC) command that carries the power adjustment value of the SCC;
sending, by the base station, the TPC command to the UE, to notify the UE of the power adjustment value of the SCC; and
adjusting a transmit power of the SCC according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 10 (depends on 9)

The method according to claim 9, further comprising:
determining, by the base station, a TPC group identifier, wherein the TPC group identifier is used to indicate a power adjustment value set; and
sending, by the base station, radio resource control (RRC) signaling that carries the TPC group identifier to the UE, so that the UE queries a corresponding power adjustment value set according to the TPC group identifier, and acquires, according to the TPC command, the power adjustment value in the found power adjustment value set to perform power control.

### Claim 11

A user equipment, comprising:
a processor, and
a memory storing instructions that, when executed by the processor, cause the processor to;
receive a transmitter power control (TPC) command sent by a base station, wherein the TPC command is used to indicate a power adjustment value of one carrier;
if the user equipment does not send a physical uplink control channel (PUCCH) in a previous uplink subframe of a current uplink subframe of the one carrier, perform, according to a PUCCH transmit power used when the UE sends a latest PUCCH from among multiple carriers and the power adjustment value, TPC accumulation to obtain an updated PUCCH transmit power of the one carrier, wherein the multiple carriers comprise the one carrier; and
adjust transmit power of the one carrier according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
query, by the UE, a carrier with the smallest time difference;
acquire, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtain, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 12 (depends on 11)

The user equipment according to claim 11, further comprising:
receive radio resource control (RRC) signaling sent by the base station, wherein the RRC signaling comprises a TPC group identifier;
query a corresponding power adjustment value set according to the TPC group identifier; and
obtain, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 13

A user equipment, comprising:
a receiver, configured to receive a transmitter power control (TPC) command sent by a base station, wherein the TPC command is used to indicate a power adjustment value of an SCC;
a processor configured to perform, according to a PUCCH transmit power used when a latest physical uplink control channel (PUCCH) is sent on the SCC and the power adjustment value, TPC accumulation to obtain an updated PUCCH transmit power of the SCC; and
the processor configured to adjust a transmit power of the SCC according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 14

A base station, comprising:
a processor, and
a memory storing instructions that, when executed by the processor, cause the processor to;
when the base station does not receive, in a previous uplink subframe of a current uplink subframe on one carrier, a physical uplink control channel (PUCCH) sent by a user equipment (UE), determine, according to a PUCCH transmit power used when the UE sends a latest PUCCH from among multiple carriers, a power adjustment value of the one carrier, wherein the multiple carriers comprise the one carrier;
generate a transmitter power control (TPC) command that carries the power adjustment value of the one carrier;
send the TPC command to the UE, to notify the UE of the power adjustment value of the one carrier; and
adjust a transmit power of the one carrier according to the power adjustment value;
for each carrier, calculating, by UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
query, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtain, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.

### Claim 15

A base station, comprising:
a processor, and
a memory storing instructions that, when executed by the processor, cause the processor to;
determine, according to a physical uplink control channel (PUCCH) transmit power used when a user equipment (UE) sends a latest PUCCH on a secondary component carrier (SCC), a power adjustment value of the SCC;
generate a transmitter power control (TPC) command that carries the power adjustment value of the SCC;
send the TPC command to the UE, to notify the UE of the power adjustment value of the SCC; and
adjust a transmit power of the SCC according to the power adjustment value;
for each carrier, calculating, by the UE, a time difference between a current moment and a moment when the latest PUCCH is sent on the each carrier;
querying, by the UE, a carrier with the smallest time difference;
acquiring, by the UE, a PUCCH transmit power used when a latest PUCCH is sent on the found carrier; and
obtaining, by the UE, according to the TPC command, the power adjustment value in the found power adjustment value set.