METHOD FOR TRANSMITTING UPLINK CONTROL CHANNEL BY TERMINAL IN WIRELESS COMMUNICATION SYSTEM

• US 20140321337A1
• Filed: 11/19/2012
• Published: 10/30/2014
• Est. Priority Date: 11/17/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dongcheol, Jang, Jiwoong, Cho, Hangyu, Lee, Hyunwoo
• Granted Patent: US 9,848,411 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method for transmitting an uplink control channel by a terminal in a wireless communication system that supports a plurality of serving cells for the terminal, comprises a step of receiving information on a plurality of serving cells include a P-cell and at least one S-cell constructed for the terminal and timing division duplex (TDD) downlink/uplink setup information for each of the plurality of serving cells, and a step of, in case of transmitting the plink control channel via a specific subframe interval, transmitting the uplink control channel through a first S-cell allocated as an uplink subframe with respect to the specific subframe interval when it is determined, based on the TDD downlink/uplink setup information, that the specific subframe interval is allocated as a downlink subframe with respect to the P-cell.

Claims

1. A method for transmitting an uplink control channel from a user equipment in a wireless communication system that supports a plurality of serving cells for the user equipment, the method comprising:

receiving information on a plurality of serving cells including a Pcell and at least one Scell configured for the user equipment and timing division duplex (TDD) downlink/uplink configuration information for each of the plurality of serving cells; and

transmitting an uplink control channel through a first Scell allocated as an uplink subframe with respect to a specific subframe interval, if it is determined that the specific subframe interval is allocated as a downlink subframe with respect to the Pcell based on the TDD downlink/uplink configuration information, in case of transmitting the uplink control channel for the specific subframe interval.

2. The method according to claim 1, further comprising:

receiving information on at least one uplink power control parameter corresponding to the first Scell; and

determining an uplink transmission power for transmitting the uplink control channel through the first Scell by using the received at least one uplink power control parameter.

3. The method according to claim 1, wherein the first Scell is a Scell having the lowest cell index of SCells of the plurality of serving cells, a SCell having the greatest number of uplink subframes of the Scells, or a predetermined Scell in case of TDD downlink/uplink configuration configured for the user equipment.

4. The method according to claim 1, wherein the first Scell is a random Scell of Scells of the plurality of serving cells.

5. The method according to claim 3, wherein the first Scell belongs to the same timing advance (TA) group as that of the Pcell.

6. The method according to claim 3, wherein the first Scell belongs to a timing advance (TA) group different from that of the Pcell.

7. The method according to claim 2, wherein the at least one uplink power control parameter information includes a cell index.

8. The method according to claim 7, wherein the at least one uplink power control parameter information is received through a higher layer signaling.

9. The method according to claim 1, wherein the uplink control channel is a physical uplink control channel (PUCCH).

10. A user equipment for transmitting an uplink control channel in a wireless communication system that supports a plurality of serving cells for the user equipment, the user equipment comprising:

a receiver configured to receive information on a plurality of serving cells including a Pcell and at least one Scell configured for the user equipment, and timing division duplex (TDD) downlink/uplink configuration information for each of the plurality of serving cells;

a processor configured to perform a control operation to transmit an uplink control channel through a first Scell allocated as an uplink subframe with respect to a specific subframe interval, if it is determined that the specific subframe interval is allocated as a downlink subframe with respect to the Pcell based on the TDD downlink/uplink configuration information, in case of transmitting the uplink control channel for the specific subframe interval; and

a transmitter configured to transmit the uplink control channel through the first Scell.

11. The user equipment according to claim 10, wherein the receiver is configured to further receive information on at least one uplink power control parameter corresponding to the first Scell, and the processor is configured to determine an uplink transmission power for transmitting the uplink control channel through the first Scell by using the received at least one uplink power control parameter.

12. The user equipment according to claim 10, wherein the first Scell is a Scell having the lowest cell index of SCells of the plurality of serving cells, a SCell having the greatest number of uplink subframes of the Scells, or a Scell previously determined in case of TDD downlink/uplink configuration configured for the user equipment.

13. The user equipment according to claim 12, wherein the first Scell belongs to the same timing advance (TA) group as that of the Pcell.