Communication method using a carrier aggregation and apparatus therefore

• US 9,559,826 B2
• Filed: 01/15/2016
• Issued: 01/31/2017
• Est. Priority Date: 06/08/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suck Chel, Seo, Dong Youn, Kim, Min Gyu, Ahn, Joon Kui, Lee, Jung Hoon
• Primary Examiner(s): Acolatse, Kodzovi
• Application Number:
  US14/997,214
• Publication Number:
  US 20160135221A1
• Time in Patent Office: 382 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0005 Time-frequency
• 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: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• 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 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method of controlling an uplink transmission in a wireless communications system, and a user equipment therefore are discussed. The method according to one embodiment includes configuring the user equipment with multiple component carriers; receiving first configuration information for allocating one or more component carrier sets; receiving second configuration information for periodically transmitting an uplink signal; receiving control information for configuring states of component carriers, by which a downlink component carrier and an uplink component carrier are controlled to be in a same state; and performing a procedure for periodically transmitting the uplink signal on an uplink component carrier in use of the first configuration information, the second configuration information and the control information. When the uplink component carrier is in the active state, a transmission of the uplink signal is performed. When the uplink component carrier is in the non-active state, the transmission of the uplink signal is skipped.

Claims

1. A method of controlling an uplink transmission at a user equipment in a wireless communications system, the user equipment being configured with multiple component carriers, the method comprising:

receiving first configuration information for allocating one or more component carrier sets, wherein each of the one or more component carrier sets includes one or more downlink component carriers and an uplink component carrier paired with the one or more downlink component carriers;

receiving second configuration information for periodically transmitting an uplink signal; and

performing a procedure for periodically transmitting the uplink signal on an uplink component carrier in use of the first configuration information and the second configuration,

wherein when the uplink component carrier is in an active state at a time for transmitting the uplink signal, a transmission of the uplink signal is performed on the uplink component carrier at the time for transmitting the uplink signal,

wherein when the uplink component carrier is in a non-active state at a time for transmitting the uplink signal, the transmission of the uplink signal is skipped on the uplink component carrier at the time for transmitting the uplink signal, and

wherein the uplink component carrier is in the non-active state, when all downlink component carriers paired with the uplink component carrier are in the non-active state.

2. The method of claim 1, wherein the first and second configuration information are radio resource control (RRC) signals.

3. The method of claim 1, wherein the uplink signal includes at least one of a channel quality indicator (CQI), a precoding matrix indication (PMI), a rank information (RI), and a sounding reference signal (SRS).

4. A user equipment configured to communicate with a base station using multiple component carriers in a wireless communications system, the user equipment comprising:

a radio frequency (RF) unit; and

a processor, wherein the processor is configured to;

receive first configuration information for allocating one or more component carrier sets, wherein each of the one or more component carrier sets includes one or more downlink component carriers and an uplink component carrier paired with the one or more downlink component carriers,

receive second configuration information for periodically transmitting an uplink signal, and

perform a procedure for periodically transmitting the uplink signal on an uplink component carrier in use of the first configuration information and the second configuration information,

wherein when the uplink component carrier is in an active state at a time for transmitting the uplink signal, a transmission of the uplink signal is performed on the uplink component carrier at the time for transmitting the uplink signal,

wherein when the uplink component carrier is in a non-active state at a time for transmitting the uplink signal, the transmission of the uplink signal is skipped on the uplink component carrier at the time for transmitting the uplink signal, and

wherein the uplink component carrier is in the non-active state, when all downlink component carriers paired with the uplink component carrier are in the non-active state.

5. The user equipment of claim 4, wherein the first and second configuration information are radio resource control (RRC) signals.

6. The user equipment of claim 4, wherein the uplink signal includes at least one of a channel quality indicator (CQI), a precoding matrix indication (PMI), a rank information (RI), and a sounding reference signal (SRS).