METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNALS IN WIRELESS COMMUNICATION SYSTEM

• US 20150341864A1
• Filed: 01/03/2014
• Published: 11/26/2015
• Est. Priority Date: 01/03/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YANG, Suckchel, AHN, Joonkui, SEO, Dongyoun, YI, Yunjung
• Granted Patent: US 9,520,984 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• 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 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 88/02 : Terminal devices

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal controlling uplink power in a carrier aggregation-based wireless communication system, comprising the steps of: configuring a first cell and a second cell; transmitting a first PUCCH signal from subframe #n in the first cell; and transmitting a second PUCCH signal from subframe #n in the second cell, wherein when the sum of transmit power of the first PUCCH signal and transmit power of the second PUCCHJ signal exceeds a predetermined maximum transmit power configured to the terminal, the transmit power of the PUCCH signal having a lower priority from among the first UCCH signal and the second PUCCH signal is reduced or the transmission is dropped.

Claims

1. A method for controlling, by a UE, uplink power in a carrier aggregation based wireless communication system, comprising:

configuring a first cell and a second cell;

performing a procedure for transmitting a first physical uplink control channel (PUCCH) signal in subframe #n of the first cell; and

performing a procedure for transmitting a second PUCCH signal in subframe #n of the second cell,

wherein, when the sum of transmit power of the first PUCCH signal and transmit power of the second PUCCHJ signal exceeds a predetermined maximum transmit power set for the UE, the transmit power of the PUCCH signal having a lower priority from among the first PUCCH signal and the second PUCCH signal is reduced or the transmission of the PUCCH signal having the lower priority is dropped.

2. The method according to claim 1, wherein, when a maximum power limit of the first cell is higher that of the second cell, priority of the first PUCCH signal is lower than that of the second PUCCH signal.

3. The method according to claim 1, wherein, when the first cell is configured as a frequency division duplex (FDD) cell and the second cell is configured as a time division duplex (TDD) cell, priority of the second PUCCH signal is lower than that of the first PUCCH signal.

4. The method according to claim 1, wherein, when the first cell is configured to an extended cyclic prefix (CP) and the second cell is configured to a normal CP, priority of the second PUCCH signal is lower than that of the first PUCCH signal.

5. The method according to claim 1, wherein, when the first cell is a primary cell (PCell) and the second cell is a secondary cell (SCell), priority of the second PUCCH signal is lower than that of the first PUCCH signal.

7. The UE according to claim 1, wherein, when a maximum power limit of the first cell is higher that of the second cell, priority of the first PUCCH signal is lower than that of the second PUCCH signal.

6. A UE configured to control uplink power in a carrier aggregation based wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to configure a first cell and a second cell, to perform a procedure for transmitting a first PUCCH signal in subframe #n of the first cell, and to perform a procedure for transmitting a second PUCCH signal in subframe #n of the second cell,

wherein, when the sum of transmit power of the first PUCCH signal and transmit power of the second PUCCH signal exceeds a predetermined maximum transmit power set for the UE, the transmit power of the PUCCH signal having a lower priority from among the first PUCCH signal and the second PUCCH signal is reduced or the transmission of the PUCCH signal having a lower priority is dropped.

8. The UE according to claim 6, wherein, when the first cell is configured as an FDD cell and the second cell is configured as a TDD cell, priority of the second PUCCH signal is lower than that of the first PUCCH signal.

9. The UE according to claim 6, wherein, when the first cell is configured to an extended CP and the second cell is configured to a normal CP, priority of the second PUCCH signal is lower than that of the first PUCCH signal.

10. The UE according to claim 6, wherein, when the first cell is a PCell and the second cell is an SCell, priority of the second PUCCH signal is lower than that of the first PUCCH signal.