# US 2014/0153534 A1 · Terminal apparatus for controlling uplink signal transmission power and method for same

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- Number: US 2014/0153534 A1
- Document ID: US20140153534A1
- Status: Published application
- Kind: A1
- Application number: 14/234,358
- Filed: 2012-09-05
- Published: 2014-06-05
- Earliest claimed: 2011-09-05
- Assignees: LG Electronics Inc.
- Inventors: Dongcheol Kim; Hangyu Cho
- Web page: https://patentgrep.com/patent/US20140153534A1

## CPC

- H04W 52/146: {Uplink power control}
- H04W 52/247: {where the output power of a terminal is based on a path parameter sent by another terminal}
- H04W 52/40: during macro-diversity or soft handoff
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04B 7/022: Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A terminal apparatus for controlling uplink signal transmission power and a method for same are disclosed. A method for the terminal, which communicates with a plurality of cooperation nodes that are controlled by one base station in one cell, controlling the uplink signal transmission power in a wireless communication system comprises the steps of: receiving diversity gain information of the plurality of cooperation nodes; determining the uplink transmission power of the uplink signal by considering the diversity gain information; and transmitting the uplink signal at the uplink transmission power that is decided, wherein the diversity gain information is an offset value which considers a diversity margin of the plurality of cooperation nodes.

## Claims

### Claim 1

A method for controlling uplink transmit (Tx) power of a terminal communicating with a plurality of cooperation nodes controlled by one base station in one cell in a wireless communication system, the method comprising:
receiving diversity gain information of the plurality of cooperation nodes;
determining uplink Tx power of an uplink signal in consideration of the diversity gain information; and
transmitting the uplink signal with the determined uplink Tx power,
wherein the diversity gain information is an offset value considering a diversity margin of the plurality of cooperation nodes.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the diversity gain information of the plurality of cooperation nodes is signaled from the plurality of cooperation nodes.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the plurality of cooperation nodes are remote radio heads (RRHs) or wired antennas of a distributed antenna system (DAS).

### Claim 4 (depends on 1)

The method according to claim 1, wherein, when the uplink signal is a physical uplink shared channel (PUSCH), the determined uplink Tx power corresponds to the following equation A
P
PUSCH
,
c

(
i
)
=
min

{
P
CMAX
,
c

(
i
)
,
10

log
10

(
M
PUSCH
,
c

(
i
)
)
+
P
O_PUSCH
,
c

(
j
)
+
α
c

(
j
)
·
PL
c
+
Δ
TF
,
c

(
i
)
+
f
c

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


A
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUSCH,c(i) is PUSCH Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 5 (depends on 1)

The method according to claim 1, wherein, when the uplink signal is a PUSCH and the PUSCH and a PUCCH are simultaneously transmitted, the determined uplink Tx power corresponds to the following equation B
P
PUSCH
,
c

(
i
)
=
min

{
10

log
10

(
P
^
CMAX
,
c

(
i
)
-
P
^
PUCCH

(
i
)
)
,
10

log
10

(
M
PUSCH
,
c

(
i
)
)
+
P
O_PUSCH
,
c

(
j
)
+
α
c

(
j
)
·
PL
c
+
Δ
TF
,
c

(
i
)
+
f
c

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


B
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUSCH,c(i) is PUSCH Tx power in the subframe i of the specific cell c, {circumflex over (P)}PUCCH,c(i) is the linear value of PUCCH Tx power, {circumflex over (P)}CMAX,c(i) is the linear value of maximum Tx power PCMAX,c(i) of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 6 (depends on 1)

The method according to claim 1, wherein a power headroom corresponding to Tx power usable as the uplink signal conforms to the following equation C
PHtype1,c(i)=PCMAX,c(i)−{10 log10(MPUSCH,c(i))+PO—PUSCH,c(j)+αc(j)·PLc+ΔTF,c(i)+fc(i)−offsetBS—Diversity—margin} [Equation C]
wherein c indicates the index of the specific cell, i represents a subframe index, PHType1,c(i) is power headroom power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, MPUSCH,c(i) is a parameter indicating a PUSCH resource allocation bandwidth represented by the number of effective resource blocks for the subframe i of the specific cell c, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 7 (depends on 1)

The method according to claim 1, wherein, when the uplink signal is a physical uplink control channel (PUCCH), the determined uplink Tx power corresponds to the following equation D
P
PUCCH

(
i
)
=
min

{
P
CMAX
,
c

(
i
)
,
P
0

_PUCCH
+
PL
c
+
h

(
n
CQI
,
n
HARQ
,
n
SR
)
+
Δ
F_PUCCH

(
F
)
+
Δ
TxD

(
F
′
)
+
g

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


D
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUCCH(i) is PUCCH Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, h(nCQI,nHARQ,nSR) is a value varied according to PUCCH format, nCQI represents the number of information bits of channel quality information (CQI), nHARQ represents the number of HARQ bits, nSR is a value indicating whether a specific subframe has a PUSCH transport block, ΔF—PUCCH(F) is a relative value for PUCCH format 1a, g(i) is a value indicating a current PUCCH power control adjustment state of the subframe i, ΔT×D(F′) is a value determined by a higher layer in which PUCCH format F′ is defined when the PUCCH is configured by the terminal such that the PUCCH is transmitted through two antenna ports, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 8 (depends on 1)

The method according to claim 1, wherein, when the uplink signal is a sounding reference symbol (SRS), the determined uplink Tx power corresponds to the following equation E
PSRS,c(i)=min{PCMAX,c(i),PSRS—OFFSET,c(m)+10 log10(MSRS,c)+PO—PUSCH,c(j)+αc(j)·PLc+fc(i)−offsetBS—Diversity—margin} [Equation E]
wherein c indicates the index of the specific cell, i represents a subframe index, PSRS,c(i) is SRS Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PSRS—OFFSET,c(m) is a UE-specific parameter corresponding to a power offset value for SRS transmission of the specific cell c, MSRS,c is SRS transmission bandwidth represented by the number of resource blocks, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 9 (depends on 1)

The method according to claim 1, wherein, when the uplink signal is a random access channel (RACH), the determined uplink Tx power corresponds to the following equation F
PPRACH=min{PCMAX,c(i),PREAMBLE_RECEIVED_TARGET_POWER+PLc−offsetBS—Diversity—margin} [Equation F]
wherein c indicates the index of the specific cell, i represents a subframe index, PPRACH is RACH Tx power in the subframe i of the specific cell c, PREAMBLE_RECEIVED_TARGET_POWER represents receive (Rx) power of a RACH preamble targeted by a BS, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 10

A terminal communicating with a plurality of cooperation nodes controlled by one base station in one cell, for controlling uplink Tx power in a wireless communication system, the terminal comprising:
a processor configured to control a transceiver to receive diversity gain information of the plurality of cooperation nodes, to determine uplink Tx power of an uplink signal in consideration of the diversity gain information and to control the transceiver to transmit the uplink signal with the determined uplink Tx power,
wherein the diversity gain information is an offset value considering a diversity margin of the plurality of cooperation nodes.

### Claim 11 (depends on 19)

The terminal according to claim 19, wherein the diversity gain information of the plurality of cooperation nodes is signaled from the plurality of cooperation nodes.

### Claim 12 (depends on 10)

The terminal according to claim 10, wherein the plurality of cooperation nodes are RRHs or wired antennas of a DAS.

### Claim 13 (depends on 10)

The terminal according to claim 10, wherein, when the uplink signal is a PUSCH, the determined uplink Tx power corresponds to the following equation A
P
PUSCH
,
c

(
i
)
=
min

{
P
CMAX
,
c

(
i
)
,
10

log
10

(
M
PUSCH
,
c

(
i
)
)
+
P
O_PUSCH
,
c

(
j
)
+
α
c

(
j
)
·
PL
c
+
Δ
TF
,
c

(
i
)
+
f
c

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


A
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUSCH,c(i) is PUSCH Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 14 (depends on 10)

The terminal according to claim 10, wherein, when the uplink signal is a PUSCH and the PUSCH and a PUCCH are simultaneously transmitted, the determined uplink Tx power corresponds to the following equation B
P
PUSCH
,
c

(
i
)
=
min

{
10

log
10

(
P
^
CMAX
,
c

(
i
)
-
P
^
PUCCH

(
i
)
)
,
10

log
10

(
M
PUSCH
,
c

(
i
)
)
+
P
O_PUSCH
,
c

(
j
)
+
α
c

(
j
)
·
PL
c
+
Δ
TF
,
c

(
i
)
+
f
c

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


B
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUSCH,c(i) is PUSCH Tx power in the subframe i of the specific cell c, {circumflex over (P)}PUCCH,c(i) is the linear value of PUCCH Tx power, {circumflex over (P)}CMAX,c(i) is the linear value of maximum Tx power PCMAX,c(i) of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 15 (depends on 10)

The terminal according to claim 10, wherein a power headroom corresponding to Tx power usable as the uplink signal conforms to the following equation C
PHtype1,c(i)=PCMAX,c(i)−{10 log10(MPUSCH,c(i))+PO—PUSCH,c(j)+αc(j)·PLc+ΔTF,c(i)+fc(i)−offsetBS—Diversity—margin} [Equation C]
wherein c indicates the index of the specific cell, i represents a subframe index, PHType1,c(i) is power headroom power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, MPUSCH,c(i) is a parameter indicating a PUSCH resource allocation bandwidth represented by the number of effective resource blocks for the subframe i of the specific cell c, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, ΔTF,c(i) is a value for one codeword of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 16 (depends on 10)

The terminal according to claim 10, wherein, when the uplink signal is a PUCCH, the determined uplink Tx power corresponds to the following equation D
P
PUCCH

(
i
)
=
min

{
P
CMAX
,
c

(
i
)
,
P
0

_PUCCH
+
PL
c
+
h

(
n
CQI
,
n
HARQ
,
n
SR
)
+
Δ
F_PUCCH

(
F
)
+
Δ
TxD

(
F
′
)
+
g

(
i
)
-
offset
BS_Diversity

_margin
}
[
Equation


D
]
wherein c indicates the index of the specific cell, i represents a subframe index, PPUCCH(i) is PUCCH Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL —PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, h(nCQI, nHARQ,nSR) is a value varied according to PUCCH format, nCQI represents the number of information bits of channel quality information (CQI), nHARQ represents the number of HARQ bits, nSR is a value indicating whether a specific subframe has a PUSCH transport block, ΔF—PUCCH(F) is a relative value for PUCCH format 1a, g(i) is a value indicating a current PUCCH power control adjustment state of the subframe i, ΔT×D(F′) is a value determined by a higher layer in which PUCCH format F′ is defined when the PUCCH is configured by the terminal such that the PUCCH is transmitted through two antenna ports, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 17 (depends on 10)

The terminal according to claim 10, wherein, when the uplink signal is a SRS, the determined uplink Tx power corresponds to the following equation E
PSRS,c(i)=min{PCMAX,c(i),PSRS—OFFSET,c(m)+10 log10(MSRS,c)+PO—PUSCH,c(j)αc(j)·PLc+fc(i)−offsetBS—Diversity—margin} [Equation E]
wherein c indicates the index of the specific cell, i represents a subframe index, PSRS,c(i) is SRS Tx power in the subframe i of the specific cell c, PCMAX,c(i) is maximum Tx power of the terminal, PSRS—OFFSET,c(m) is a UE-specific parameter corresponding to a power offset value for SRS transmission of the specific cell c, MSRS,c is SRS transmission bandwidth represented by the number of resource blocks, PO—PUSCH,c(j) is a parameter corresponding to the sum of a cell-specific nominal component PO—NOMINAL—PUSCH,c(j) provided by a higher layer of the specific cell c and a UE-specific component PO—UE—PUSCH,c(j) provided by the higher layer, αc(j) is a cell-specific parameter, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, fc(i) is a value indicating a current PUSCH power control adjustment state for the subframe i of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.

### Claim 18 (depends on 10)

The terminal according to claim 10, wherein, when the uplink signal is a RACH, the determined uplink Tx power corresponds to the following equation F
PPRACH=min{PCMAX,c(i),PREAMBLE_RECEIVED_TARGET_POWER+PLc−offsetBS—Diversity—margin} [Equation F]
wherein c indicates the index of the specific cell, i represents a subframe index, PPRACH is RACH Tx power in the subframe i of the specific cell c, PREAMBLE_RECEIVED_TARGET_POWER represents receive (Rx) power of a RACH preamble targeted by a BS, PLc is a downlink pathloss estimate calculated in dB by the terminal of the specific cell c, and offsetBS—Diversity—margin is transmission/reception diversity between base stations of the terminal.