Communication method using a carrier aggregation and apparatus therefore

• US 9,854,567 B2
• Filed: 11/09/2016
• Issued: 12/26/2017
• 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:
  US15/347,473
• Publication Number:
  US 20170064687A1
• Time in Patent Office: 412 Days
• Field of Search: None
• 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 and a user equipment for controlling an uplink transmission at in a wireless communications system are discussed, the user equipment being configured with multiple component carriers. The method according to an embodiment includes receiving, from a base station, Radio Resource Control (RRC) configuration information for a channel status information report; and performing a procedure for periodically transmitting channel status information to the base station. If the corresponding downlink component carrier is in an active state at a time for transmitting the channel status information, a transmission of the channel status information report is performed at the time. If the corresponding downlink component carrier is in a non-active state at a time for transmitting the channel status information report, the transmission of the channel status information report is skipped at the time. Signal reception is limited by the user equipment on a downlink component carrier in the non-active state.

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 uplink component carriers, the method comprising:

receiving, from a base station, Radio Resource Control (RRC) configuration information for a Sounding Reference Signal (SRS), the configuration information including information for periodically transmitting the SRS to the base station; and

performing a procedure for periodically transmitting the SRS to the base station on an uplink component carrier of the multiple uplink component carriers in use of the configuration information,

wherein if the uplink component carrier is in an active state at a time for transmitting the SRS, a transmission of the SRS is performed at the time for transmitting the SRS,

wherein if the uplink component carrier is in a non-active state at a time for transmitting the SRS, the transmission of the SRS is skipped at the time for transmitting the SRS,

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

wherein signal reception is normally performed by the user equipment on a downlink component carrier in the active state, and the signal reception is limited by the user equipment on a downlink component carrier in the non-active state.

2. The method of claim 1, wherein the active/non-active states of the uplink component carrier are controlled by using a lower layer control signaling.

3. The method of claim 2, wherein the lower layer control signaling is a control signaling of a layer located below an RRC layer.

4. The method of claim 1, wherein if the uplink component carrier is in the non-active state at the time for transmitting the SRS, a transmission cycle period of the SRS is modified to be N times larger, and N is an integer of 2 or more.

5. A user equipment for use in a wireless communications system using multiple uplink component carriers, the user equipment comprising:

a radio frequency (RF) unit configured to transmit and receive wireless signals to and from a base station;

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

a processor 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, from the base station, Radio Resource Control (RRC) configuration information for a Sounding Reference Signal (SRS), the configuration information including information for periodically transmitting the SRS to the base station, and

perform a procedure for periodically transmitting the SRS on an uplink component carrier of the multiple uplink component carriers to the base station in use of the configuration information,

wherein if the uplink component carrier is in an active state at a time for transmitting the SRS, a transmission of the SRS is performed at the time for transmitting the SRS,

wherein if the uplink component carrier is in a non-active state at a time for transmitting the SRS, the transmission of the SRS is skipped at the time for transmitting the SRS,

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

wherein signal reception is normally performed by the user equipment on a downlink component carrier in the active state, and the signal reception is limited by the user equipment on a downlink component carrier in the non-active state.

6. The user equipment of claim 5, wherein the active/non-active states of the uplink component carrier are controlled by using a lower layer control signaling.

7. The user equipment of claim 6, wherein the lower layer control signaling is a control signaling of a layer located below an RRC layer.

8. The user equipment of claim 5, wherein if the uplink component carrier is in the non-active state at the time for transmitting the SRS, a transmission cycle period of the SRS is modified to be N times larger, and N is an integer of 2 or more.