METHOD AND APPARATUS OF ACTIVATING/DEACTIVATING SECONDARY CARRIERS IN MOBILE COMMUNICATION SYSTEM USING CARRIER AGGREGATION

• US 20160007327A1
• Filed: 09/11/2015
• Published: 01/07/2016
• Est. Priority Date: 01/11/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JANG, Jae Hyuk, KIM, Soeng Hun, NG, Boon Loong, VAN LIESHOUT, Gert-Jan, JEONG, Kyeong In, CHO, Joon Young
• Granted Patent: US 10,123,314 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for activating/deactivating secondary carriers of a User Equipment (UE) in a mobile communication system supporting carrier aggregation is provided. The method comprises, receiving a control message including an activation/deactivation Control Element (CE) in a first sub-frame from a Base station, identifying an activation command or a deactivation command of at least one secondary carrier based on the control message, determining whether a current sub-frame is a second sub-frame or not, performing at least one first operation for the at least one secondary carrier in a second sub-frame, and performing, when the activation/deactivation CE indicates deactivation of the at least one secondary carrier, at least one second operation for the at least one secondary carrier no later than the second sub-frame.

Claims

1. A method for activating/deactivating a secondary carrier of a user equipment (UE) in a mobile communication system supporting carrier aggregation, the method comprising:

receiving control information including an activation command or a deactivation command of at least one secondary carrier in a first sub-frame from a base station;

performing a first operation for the at least one secondary carrier in a second sub-frame; and

performing, if the control information includes the deactivation command of the at least one secondary carrier, a second operation for the at least one secondary carrier no later than the second sub-frame.

2. The method of claim 1, a difference of sub-frames between the first sub-frame and the second sub-frame is 8.

3. The method of claim 1, wherein the first operation comprises at least one of a channel state information report, physical downlink control channel monitoring on the at least one secondary carrier, and a sounding reference signal transmission, if the control information includes the activation command of the at least one secondary carrier.

4. The method of claim 3, wherein the at least one channel state information report comprises at least one of a channel quality indicator, a precoding matrix index, a rank indicator, and a precoder type indicator.

5. The method of claim 1, wherein the second operation comprises at least one of a termination of physical downlink control channel monitoring and a termination of sounding reference signal transmission of the at least one secondary carrier.

6. The method of claim 1, wherein the first operation comprises a termination of channel state information report, if the control information includes the deactivation command of the at least one secondary carrier.

7. A user equipment (UE) for controlling activation/deactivation of secondary carriers in a mobile communication system supporting carrier aggregation, the UE comprising:

a transceiver configured to transmit and receive signals with a base station; and

a controller configured to;

receive control information including an activation command or a deactivation command of at least one secondary carrier in a first sub-frame from a base station,

perform a first operation for the at least one secondary carrier in a second sub-frame, and

perform, if the control information includes the deactivation command of the at least one secondary carrier, a second operation for the at least one secondary carrier no later than the second sub-frame.

8. The UE of claim 7, wherein a difference of sub-frames between the first sub-frame and the second sub-frame is 8.

9. The UE of claim 7, wherein the first operation comprises at least one of a channel state information report, physical downlink control channel monitoring on the at least one secondary carrier, and a sounding reference signal transmission, if the control information includes the activation command of the at least one secondary carrier.

10. The UE of claim 9, wherein the at least one channel state information report comprises at least one of a channel quality indicator, a precoding matrix index, a rank indicator, and a precoder type indicator.

11. The UE of claim 7, wherein the second operation comprises at least one of a termination of physical downlink control channel monitoring and a termination of sounding reference signal transmission of the at least one secondary carrier.

12. The UE of claim 7, wherein the first operation comprises a termination of channel state information report, if the control information includes the deactivation command of the at least one secondary carrier.