Method for dynamic allocation of radio resources in wireless communication system and device therefor

• US 9,549,395 B2
• Filed: 04/30/2013
• Issued: 01/17/2017
• Est. Priority Date: 04/30/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Seo, Hanbyul
• Primary Examiner(s): LO, DIANE LEE
• Application Number:
  US14/390,712
• Publication Number:
  US 20150055584A1
• Time in Patent Office: 1,358 Days
• Field of Search: None
• US Class Current: 1/1
• 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 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a method for transmitting an uplink signal of a terminal using multiple component carriers in a wireless communication system and, more particularly, to a method for transmitting an uplink signal of a terminal using multiple component carriers in a wireless communication system which supports carrier aggregation, comprising the steps of: receiving setting information on a second-type component carrier from a base station through a first-type component carrier; and transmitting an uplink signal to the base station through the second-type component carrier, wherein the use of the second-type component carrier for a specific subframe is changed according to the setting information.

Claims

1. A method of transmitting an uplink signal, which is transmitted by a user equipment using a plurality of component carriers (CCs) in a wireless communication system supporting carrier aggregation, comprising:

receiving a time division duplex uplink-downlink (TDD UL-DL) configuration for a second component carrier through a physical control channel or a higher layer signaling,

wherein the TDD UL-DL configuration indicates an uplink-downlink resource configuration of a plurality of subframes;

receiving configuration information indicating at least one subframe among the plurality of subframes on the second component carrier from an eNode B via a first component carrier,

wherein each of the indicated at least one subframe is a downlink subframe according to the TDD UL-DL configuration;

if control information for the indicated at least one subframe is not received prior to the indicated at least one subframe, detecting the control information for the indicated at least one subframe by performing a blind decoding in uplink subframes indicated by the TDD UL-DL configuration; and

when the detected control information is an uplink grant, transmitting the uplink signal to the eNode B in the indicated at least one subframe via the second component carrier.

2. The method of claim 1, wherein the second component carrier is demodulated using a user equipment specific reference signal (cell specific reference signal (DM-RS)) or a channel state information-reference signal (CSI-RS).

3. The method of claim 1, wherein each of the indicated at least one subframe corresponds to a subframe configured not to carry a specific reference signal from the eNode B.

4. The method of claim 3, wherein the specific reference signal corresponds to a common reference signal (CRS).

5. The method of claim 1, wherein each of the indicated at least one subframe corresponds to a subframe of which a usage of a radio resource is changed based on the detected control information.

6. The method of claim 1, wherein the indicated at least one subframe is indicated by the eNode B.

7. A user equipment transmitting an uplink signal using a plurality of component carriers (CCs) in a wireless communication system supporting carrier aggregation, comprising:

a transceiver; and

a processor configured to control the transceiver, the processor further configured to;

receive a time division duplex uplink-downlink (TDD UL-DL) configuration for a second carrier through a physical control channel or a higher layer signaling,

wherein the TDD UL-DL configuration indicates an uplink-downlink resource configuration of a plurality of subframes,

receive configuration information indicating at least one subframe among the plurality of subframes on the second component carrier from an eNode B via a first component carrier,

wherein each of the indicated at least one subframe is a downlink subframe according to the TDD UL-DL configuration,

if control information for the indicated at least one subframe is not received prior to the indicated at least one subframe, detect the control information for the indicated at least one subframe by performing a blind decoding in uplink subframes indicated by the TDD UL-DL configuration, and

when the detected control information is an uplink grant, transmit the uplink signal to the eNode B in the at least one subframe via the second component carrier.