METHOD AND USER DEVICE FOR RECEIVING UPLINK CONTROL INFORMATION, AND METHOD AND BASE STATION FOR TRANSMITTING UPLINK CONTROL INFORMATION

• US 20150249972A1
• Filed: 12/17/2013
• Published: 09/03/2015
• Est. Priority Date: 12/17/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: You, Hyangsun, Yi, Yunjung, Ahn, Joonkui, Yang, Suckchel
• Granted Patent: US 9,591,631 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• 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 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

The base station of the present invention notifies a user device of a first set of cells and a set of parameters corresponding respectively to the cells of the first set of cells, and notifies the user device of a second set of cells that is a subset of the first set of cells and that is associated with the user device. The user device may receive a downlink signal or transmit an uplink signal by sing one of the sets of parameters associated with the second set of cells.

Claims

1. A method for receiving, by a user equipment, a downlink signal, the method comprising:

receiving first information on a first cell set comprising a plurality of cells and on a plurality of parameter sets respectively corresponding to the plurality of cells;

receiving second information indicating a second cell set comprising at least one of the plurality of cells;

receiving third information indicating a specific cell in the second cell set; and

receiving the downlink signal through the specific cell using a parameter set of the specific cell among the plurality of parameter sets based on the third information.

2. The method according to claim 1, wherein each of the plurality of parameter sets comprises at least the number of antenna ports of a corresponding cell, zero power CSI-RS (channel state information reference signal) resource configuration information of the corresponding cell, information indicating a start symbol of a physical downlink control channel of the corresponding cell or non-zero power CSI-RS resource configuration information of the corresponding cell.

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

receiving fourth information indicating switching of a serving cell to another cell different from the specific cell through the physical downlink control channel of the specific cell; and

receiving another downlink signal through the another cell using a parameter set of the another cell among the plurality of parameter sets based on the fourth information,

wherein the another cell belongs to the second cell set.

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

attempting to decode a discovery signal for each cell in the second cell set and determining a state of each cell in the second cell set.

5. A user equipment for receiving a downlink signal, the user equipment comprising:

a radio frequency (RF) unit and a processor configured to control the RF unit, the processor configured to;

control the RF unit to receive first information on a first cell set comprising a plurality of cells and on a plurality of parameter sets respectively corresponding to the cells, second information indicating a second cell set comprising at least one of the cells, and third information indicating a specific cell in the second cell set; and

control the RF unit to receive the downlink signal through the specific cell using a parameter set of the specific cell among the plurality of parameter sets based on the third information.

6. The user equipment according to claim 5, wherein each of the plurality of parameter sets comprises at least the number of antenna ports of a corresponding cell, zero power CSI-RS (channel state information reference signal) resource configuration information of the corresponding cell, information indicating a start symbol of a physical downlink control channel of the corresponding cell or non-zero power CSI-RS resource configuration information of the corresponding cell.

7. The user equipment according to claim 5, wherein the processor is configured to:

control the RF unit to receive fourth information indicating switching of a serving cell to another cell different from the specific cell through the physical downlink control channel of the specific cell; and

control the RF unit to receive another downlink signal through the another cell using a parameter set of the another cell among the plurality of parameter sets based on the fourth information,

wherein the another cell belongs to the second cell set.

8. The user equipment according to claim 5, wherein the processor is configured to attempt to decode a discovery signal for each cell in the second cell set.

9. A method for transmitting, by a base station, a downlink signal, the method comprising:

transmitting first information on a first cell set comprising a plurality of cells and on a plurality of parameter sets respectively corresponding to the plurality of cells;

transmitting second information indicating a second cell set comprising at least one of the plurality of cells;

transmitting third information indicating a specific cell in the second cell set; and

transmitting the downlink signal through the specific cell using a parameter set of the specific cell among the plurality of parameter sets based on the third information.

10. A base station for transmitting a downlink signal, the base station comprising:

a radio frequency (RF) unit and a processor configured to control the RF unit, the processor configured to;

control the RF unit to transmit first information on a first cell set comprising a plurality of cells and on a plurality of parameter sets respectively corresponding to the plurality of cells, second information indicating a second cell set comprising at least one of the plurality of cells, and third information indicating a specific cell in the second cell set; and

control the RF unit to transmit the downlink signal through the specific cell using a parameter set of the specific cell among the plurality of parameter sets based on the third information.