COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE

• US 20130039311A1
• Filed: 09/14/2012
• Published: 02/14/2013
• Est. Priority Date: 06/08/2009
• Status: Active Grant

• Current Assignee: Dong Young Seo, Joon Kui Ahn, Jung-Hoon Lee, Min-Gyu Kim, Suck Chel Yang
• Original Assignee: Dong Young Seo, Joon Kui Ahn, Jung-Hoon Lee, Min-Gyu Kim, Suck Chel Yang
• Inventors: SEO, Dong Youn, AHN, Joon Kui, LEE, Jung Hoon, YANG, Suck Chel, KIM, Min Gyu
• Granted Patent: US 9,209,953 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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

The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted.

Claims

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

receiving configuration information for channel status report from a base station; and

performing one or more operations for transmitting channel status information for a downlink component carrier to the base station in use of the configuration information, the configuration information indicating a periodic transmission time of the channel status information,

wherein if the downlink component carrier is in an active state at a time for transmitting the channel status information, the channel status information is uplink transmitted at the time, and

wherein if the downlink component carrier is in a non-active state at a time for transmitting the channel status information, the channel status information is not uplink transmitted at the time.

2. The method of claim 1, wherein the channel status information for the downlink component carrier is transmitted on a specific uplink component carrier, the specific uplink component carrier being an uplink component carrier configured for channel status reports of all configured downlink component carriers.

3. The method of claim 2, wherein the specific uplink component carrier is not configured as a non-available state regardless of states of the configured downlink component carriers.

4. The method of claim 1, wherein whether or not a corresponding uplink component carrier is in a non-available state is identified by using a state of the downlink component carrier linked to the corresponding uplink component carrier.

5. The method of claim 1, wherein the configuration information is received using a Radio Resource Control (RRC) signal.

6. The method of claim 1, wherein the channel status information includes a CQI (Channel Quality Indicator).

7. 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 configured to transmit and receive wireless signals to and from the base station;

a memory configured to store information being transmitted and received to and from the base station and parameters required for performing operations of the user equipment; and

a processor configured to be connected to the RF unit and the memory, and configured to control the RF unit and the memory, so as to operate the user equipment,

wherein the processor is configured to receive configuration information for channel status information from the base station, and to perform one or more operations for transmitting the channel status information to the base station in use of the configuration information, the configuration information indicating a periodic transmission time of the channel status information,

wherein if a corresponding downlink component carrier is in an active state at a time for transmitting the channel status information, the channel status information is uplink transmitted at the time, and

wherein if the corresponding downlink component carrier is in a non-active state at a time for transmitting the channel status information, the channel status information is not uplink transmitted at the time.

8. The user equipment of claim 7, wherein the channel status information for the downlink component carrier is transmitted on a specific uplink component carrier, the specific uplink component carrier being an uplink component carrier configured for channel status reports of all configured downlink component carriers.

9. The user equipment of claim 8, wherein the specific uplink component carrier is not configured as a non-available state regardless of states of the configured downlink component carriers.

10. The user equipment of claim 7, wherein whether or not a corresponding uplink component carrier is in a non-available state is identified by using a state of the downlink component carrier linked to the corresponding uplink component carrier.

11. The user equipment of claim 7, wherein the configuration information is received using a Radio Resource Control (RRC) signal.

12. The user equipment of claim 7, wherein the channel status information includes a CQI (Channel Quality Indicator).