Method and apparatus for transmitting uplink control information in wireless communication system

• US 9,467,984 B2
• Filed: 01/25/2013
• Issued: 10/11/2016
• Est. Priority Date: 01/27/2012
• Status: Active Grant

• Current Assignee: Blackberry Limited
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Dong Youn, Ahn, Joon Kui, Yi, Yun Jung, Yang, Suck Chel, Kim, Bong Hoe
• Primary Examiner(s): KHAJURIA, SHRIPAL K
• Application Number:
  US14/374,209
• Publication Number:
  US 20140369294A1
• Time in Patent Office: 1,355 Days
• Field of Search: 370/329
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

Provided are a method for a terminal transmitting uplink control information (UCI) through a physical uplink control channel (PUCCH) in a wireless communication system, and a terminal using the method. A transmission power to be applied to the uplink control channel is determined on the basis of a value subordinate to a PUCCH format, and at least one type of UCI is transmitted from the physical uplink control channel by using the transmission power that is determined, wherein when the PUCCH format is PUCCH format 3, and the at least one type of UCI includes acknowledgement/negative-acknowledgement (ACK/NACK) and periodic channel state information (CSI), the value subordinate to the PUCCH format is determined on the basis of the number of bits of the ACK/NACK and the number of bits of the periodic CSI.

Claims

1. A method for transmitting, by user equipment, uplink control information (UCI) through a physical uplink control channel (PUCCH) in a wireless communication system, the method comprising:

determining, based on a PUCCH format dependent value, transmission power to be applied to an uplink control channel of a subframe, wherein PUCCH formats are classified according to a modulation scheme and the number of bits transmitted in the subframe; and

transmitting at least one type of UCI at the determined transmission power in the uplink control channel,

wherein, if the PUCCH format is PUCCH format 3 which uses quadrature phase shift keying as the modulation scheme and in which 48 bits can be transmitted, and if the at least one type of UCI includes an acknowledgement/not-acknowledgement (ACK/NACK) and periodic channels state information (CSI),

the PUCCH format dependent value is determined based on the number of bits of the ACK/NACK and the number of bits of the periodic CSI, and

wherein;

if PUCCH format 3 is configured to be transmitted through two antenna ports or if a total sum of the at least one type of UCI is larger than 11 bits, the PUCCH format dependent value is determined as Equation 1 given below, and

if the at least one type of UCI is transmitted through the single antenna port and a total sum of the at least one type of UCI is equal to or smaller than 11 bits, the PUCCH format dependent value is determined as Equation 2 given below,

h(n_CQI,n_HARQ,n_SR)=(n_HARQ+n_SR+n_CQI−

1)/3 

 

[Equation 1]

h(n_CQI,n_HARQ,n_SR)=(n_HARQ+n_SR+n_CQI−

1)/2, 

 

[Equation 2]

in Equations 1 and 2 given above,

h(n_CQI, n_HARQ, n_SR) represents the PUCCH format dependent value,

n_HARQ presents the number of bits of the ACK/NACK,

n_CQI represents the number of bits of the periodic CSI, and

n_SR is 1 in a case where the subframe is configured for a scheduling request (SR) for the user equipment not having any associated transport block for uplink shared channel (UL-SCH) and n_SR is 0 in a case where the subframe is configured for a SR for the user equipment having any associated transport block for UL-SCH.

2. The method of claim 1, wherein:

when a serving cell in which the user equipment operates is a primary cell in which the user equipment performs an initial connection establishment procedure or a connection reestablishment procedure with a base station,

the transmission power is determined as a minimum value of maximum output power of the user equipment set in the subframe and the power determined based on the PUCCH format dependent value.

3. The method of claim 1, wherein when the ACK/NACK is transmitted through modulation of the reference signal symbol included in PUCCH format 3, the number of bits of the ACK/NACK transmitted through the modulation of the reference signal symbol is not included in n_HARQ.

4. The method of claim 1, wherein if the at least one type of UCI includes only the acknowledgement/not-acknowledgement (ACK/NACK) or scheduling request (SR) and the total sum of the at least one type of UCI is larger than 11 bits or PUCCH format 3 is configured to be transmitted through two antenna ports, the PUCCH format dependent value is determined in Equation 3 given below and in other cases, the PUCCH format dependent value is determined in Equation 4;

h(ncQ,nHARQ,nsR)=(nHARQ+nSR−

1)/3 

 

[Equation 3]

h(ncQ,nHARQ,nsR)=(nHARQ+nSR−

1)/2 

 

[Equation 4]

In Equations 3 and 4 given above, h(ncQ, nHARQ, nsR) represents the PUCCH format dependent value, nHARQ represents the number of bits of the ACK/NACK, and nsR is 1 in the case where the subframe is set configured for the scheduling request (SR) for the user equipment not having any associated transport block for uplink shared channel (UL-SCH) and nsR is 0 in a case where the subframe is configured for a SR for the user equipment having any associated transport block for UL-SCH.

5. The method of claim 1, wherein:

the at least one type of UCI is joint-coded.

6. User equipment, comprising:

a radio frequency (RF) unit transmitting or receiving a radio signal; and

a processor connected with the RF unit,

wherein the processor is configured for;

determining, based on a PUCCH format dependent value, transmission power to be applied to an uplink control channel of a subframe, wherein PUCCH formats are classified according to a modulation scheme and the number of bits transmitted in the subframe; and

transmitting at least one type of UCI at the determined transmission power in the uplink control channel,

wherein, if the PUCCH format is PUCCH format 3 which uses quadrature phase shift keying as the modulation scheme and in which 48 bits can be transmitted, and if the at least one type of UCI includes an acknowledgement/not-acknowledgement (ACK/NACK) and periodic channels state information (CSI),

the PUCCH format dependent value is determined based on the number of bits of the ACK/NACK and the number of bits of the periodic CSI, and

wherein;

if PUCCH format 3 is configured to be transmitted through two antenna ports or if a total sum of the at least one type of UCI is larger than 11 bits, the PUCCH format dependent value is determined as Equation 1 given below, and

if the at least one type of UCI is transmitted through the single antenna port and a total sum of the at least one type of UCI is equal to or smaller than 11 bits, the PUCCH format dependent value is determined as Equation 2 given below,

h(n_CQI,n_HARQ,n_SR)=(n_HARQ+n_SR+n_CQI−

1)/3 

 

[Equation 1]

h(n_CQI,n_HARQ,n_SR)=(n_HARQ+n_SR+n_CQI−

1)/2, 

 

[Equation 2]

in Equations 1 and 2 given above,

h(n_CQI, n_HARQ, n_SR) represents the PUCCH format dependent value,

n_HARQ presents the number of bits of the ACK/NACK,

n_CQI represents the number of bits of the periodic CSI, and

n_SR is 1 in a case where the subframe is configured for a scheduling request (SR) for the user equipment not having any associated transport block for uplink shared channel (UL-SCH) and n_SR is 0 in a case where the subframe is configured for a SR for the user equipment having any associated transport block for UL-SCH.