Method of transmitting uplink control information in wireless communication system supporting change of usage of radio resource and apparatus therefor

• US 9,674,790 B2
• Filed: 04/06/2015
• Issued: 06/06/2017
• Est. Priority Date: 04/08/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Seo, Hanbyul, Yang, Suckchel, Seo, Inkwon, Chae, Hyukjin
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US14/679,829
• Publication Number:
  US 20150289211A1
• Time in Patent Office: 792 Days
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 40/246 Connectivity information discovery
• CPC Class Codes: H04W 48/14 using user query or user detection
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• 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

Abstract

The present invention relates to a method of transmitting uplink control information (UCI), which is transmitted by a user equipment in a wireless communication system. In particular, the method includes the steps of receiving first offset information associated with uplink control information (UCI) transmission in uplink subframes according to uplink-downlink configuration of a serving cell and receiving a power control parameter configuring a first uplink power control subframe set and a second uplink power control subframe set for the uplink subframes. In this case, the first uplink power control subframe set and the second uplink power control subframe set are configured to be independently applied by an offset for transmitting the uplink control information.

Claims

1. A method of transmitting UCI (uplink control information) by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, by the UE from a serving cell, a first type of beta offset and a second type of beta offset which are associated with an uplink control information (UCI) transmission;

determining, by the UE, an uplink power of a UCI transmission to the serving cell based on a UCI transmission subframe and one of the first type of beta offset or the second type of the beta offset; and

transmitting, by the UE to the serving cell, the UCI based on the determined uplink power,

wherein, if the UCI transmission subframe belongs to a first type uplink power control subframe set, the uplink power is determined based on the first type of beta offset, and

wherein, if the UCI transmission subframe belong to a second type uplink power control subframe set, the uplink power is determined based on the second type of beta offset.

2. The method of claim 1, wherein the first type uplink power control subframe set and the second type uplink power control subframe set are configured by RRC (Radio Resource Control) signaling.

3. The method of claim 1,

wherein the first type of beta offset is one of a first beta offset ACK (acknowledgement), a first beta offset RI (rank indicator) and a first beta offset CQI (Channel Quality Indicator), and

wherein the second type of beta offset value is one of a second beta offset ACK, a second beta offset RI and a second beta offset CQI.

4. The method of claim 1, wherein if another serving cell, different from the serving cell and not configured with uplink power control subframe sets, is carrier aggregated with the serving cell, the method further comprises:

determining, by the UE, an uplink power of a UCI transmission to the another serving cell based on the first type of beta offset; and

transmitting, by the UE to the another serving cell, the UCI based on the uplink power determined for the another serving cell.

5. The method of claim 1, wherein, if the UE is preconfigured with a beta offset for controlling the uplink power, the method further comprises:

using, by the UE, the preconfigured beta offset in place of the received first type of beta offset when determining the uplink power of the UCI transmission to the serving cell.

6. A User Equipment (UE) for transmitting UCI (uplink control information) in a wireless communication system, the UE comprise of:

a radio frequency unit; and

a processor operatively connected with the radio frequency unit,

the processor is configured to;

receive, from a serving cell, a first type of beta offset and a second type of beta offset which are associated with an uplink control information (UCI) transmission;

determine an uplink power of the UCI transmission to the serving cell based on a UCI transmission subframe and one of the first type of beta offset or the second type of the beta offset; and

transmit the UCI to the serving cell based on the determined uplink power,

wherein, if the UCI transmission subframe belongs to a first type uplink power control subframe set, the uplink power is determined based on the first type of beta offset, and

wherein, if the UCI transmission subframe belong to a second type uplink power control subframe set, the uplink power is determined based on the second type of beta offset.

7. The UE of claim 6, wherein the first type uplink power control subframe set and the second type uplink power control subframe set are configured by RRC (Radio Resource Control) signaling.

8. The UE of claim 6,

wherein the first type of beta offset is one of a first beta offset ACK (acknowledgement), a first beta offset RI (rank indicator) and a first beta offset CQI (Channel Quality Indicator), and

wherein the second type of beta offset value is one of a second beta offset ACK, a second beta offset RI and a second beta offset CQI.

9. The UE of claim 6, wherein if another serving cell, which is different from the serving cell and is not configured with uplink power control subframe sets, is carrier aggregated with the serving cell, the processor is further configured to:

determine an uplink power of a UCI transmission to the another serving cell based on the first type of beta offset; and

transmit, to the another serving cell, the UCI based on the uplink power determined for the another serving cell.

10. The UE of claim 6, wherein, if the UE is preconfigured with a beta offset for controlling the uplink power, the processor is further configured to:

use preconfigured the beta offset in place of the received first type of beta offset when determining the uplink power of the UCI transmission to the serving cell.