METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION

• US 20150208402A1
• Filed: 06/27/2013
• Published: 07/23/2015
• Est. Priority Date: 09/19/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Yi, Yunjung, Kim, Bonghoe, Seo, Dongyoun
• Granted Patent: US 9,635,654 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

One embodiment of the present specification discloses a method for transmitting uplink control information (UCI). The method may be performed by a terminal and comprise receiving control information for setting such that an uplink control channel and an uplink shared channel are not simultaneously transmitted on one uplink subframe; selecting one of the channels, if first uplink control information (UCI) for a first cell and second uplink control information (UCI) for a second cell are requested to be simultaneously transmitted on the one uplink subframe through the uplink control channel in case of the first uplink control information (UCI) and through the uplink shared channel in case of the second uplink control information (UCI); and transmitting at least one from among the first uplink control information (UCI) and the second uplink control information (UCI) on the uplink subframe through the selected channel.

Claims

1. A method of transmitting, by user equipment, Uplink Control Information (UCI) in a wireless communication system, the method comprising steps of:

receiving control information that configures an uplink control channel and an uplink shared channel to be not simultaneously transmitted on a single uplink subframe;

selecting any one of the uplink control channel and the uplink shared channel if first UCI for a first cell and second UCI for a second cell are required to be simultaneously transmitted through the uplink control channel and the uplink shared channel, respectively, on a single uplink subframe; and

transmitting one or more of the pieces of first and second UCI on the uplink subframe through the selected channel.

2. The method of claim 1, wherein in selection, any one channel is selected based on a cell, a type of UCI, and a container.

3. The method of claim 2, wherein a priority is determined based on any one of the cell, type of UCI, and container.

4. The method of claim 1, further comprising steps of:

receiving scheduling information from each of the first cell and the second cell on a downlink control channel; and

receiving downlink data from each of the first cell and the second cell based on the received scheduling information,

wherein each of the pieces of first and second UCI comprises an HARQ-ACK/NACK for each of the downlink data.

5. The method of claim 4, wherein the step of transmitting one or more of the pieces of first and second UCI comprises piggybacking an HARQ-ACK/NACK to be transmitted through another channel other than the selected channel to the selected channel and transmitting the HARQ-ACK/NACK if each of the pieces of first and second UCI comprises the HARQ-ACK/NACK.

6. The method of claim 5, wherein a process for reducing a number of bits of the UCI to be transmitted through the selected channel is performed.

7. The method of claim 1, wherein UCI to be transmitted through another channel other than the selected channel is dropped from the uplink subframe.

8. The method of claim 1, wherein:

an ID of the first cell is used for the transmission of the uplink control channel if the first UCI is transmitted to the first cell through the uplink control channel, and

an ID of the secondary cell is used for the transmission of the uplink shared channel if the second UCI is transmitted to the secondary cell through the uplink shared channel.

9. The method of claim 8, wherein the ID of the first cell and the ID of the secondary cell are obtained through the first cell.

10. The method of claim 1, wherein:

the uplink control channel to be transmitted to the first cell is scrambled using an ID of the first cell, and

the uplink shared channel to be transmitted to the secondary cell is scrambled using an ID of the secondary cell.

11. The method of claim 1, wherein the first cell and the secondary cell belong to independent base stations.

13. The user equipment of claim 1, wherein the RF unit piggybacks an HARQ-ACK/NACK to be transmitted through another channel other than the selected channel to the selected channel and transmits the HARQ-ACK/NACK if each of the pieces of first and second UCI comprises the HARQ-ACK/NACK.

14. The user equipment of claim 13, wherein the processor performs a process for reducing a number of bits of the UCI to be transmitted through the selected channel is performed.

12. A user equipment for transmitting Uplink Control Information (UCI) in a wireless communication system, the user equipment comprising:

an RF unit which receives control information that configures an uplink control channel and an uplink shared channel to be not simultaneously transmitted on a single uplink subframe; and

a processor which selects any one of the uplink control channel and the uplink shared channel if first UCI for a first cell and second UCI for a second cell are required to be simultaneously transmitted through the uplink control channel and the uplink shared channel, respectively, on a single uplink subframe,

wherein the RF unit transmits one or more of the pieces of first and second UCI on the uplink subframe through the channel selected by the processor.

15. The user equipment of claim 12, wherein the processor drops UCI to be transmitted through another channel other than the selected channel from the uplink subframe.