Method and apparatus for activating or deactivating secondary carriers in time division duplex mobile communication system using carrier aggregation

• US 9,031,031 B2
• Filed: 10/20/2014
• Issued: 05/12/2015
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jang, Jaehyuk, Kim, Soenghun
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): DUDA, ADAM K
• Application Number:
  US14/518,494
• Publication Number:
  US 20150036635A1
• Time in Patent Office: 204 Days
• Field of Search: 370/241, 370/252, 370/329, 370/331, 455/422.1
• US Class Current: 370/329
• 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 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• 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

Abstract

A method and an apparatus for activating or deactivating a primary carrier and secondary carriers in a Time Division Duplex Long Term Evolution (TDD LTE) system using carrier aggregation are provided. An apparatus includes an User Equipment employing the method corresponding the operation associated with the activation and deactivation of SCells, which thereby performs communication with eNBs without errors.

Claims

1. A method in a mobile communication system using carrier aggregation (CA), the method comprising:

receiving, by a terminal, control information for activating a secondary cell from a base station;

transmitting, by the terminal, first information including channel status information (CSI) for the secondary cell in a first subframe; and

transmitting, by the terminal, second information including a sounding reference signal for the secondary cell no earlier than the first subframe,

wherein the first information is transmitted in a subframe n+8, if the control information is received in a subframe n.

2. The method of claim 1, wherein the first information includes channel quality indicator (CQI).

3. The method of claim 1, wherein a time interval between receiving the control information and transmitting the first information is a time corresponding to 8 subframes.

4. The method of claim 1,

wherein the second information is transmitted no later than a second subframe;

and

wherein the second subframe is different from the first subframe.

5. A terminal in a mobile communication system using carrier aggregation (CA), the terminal comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to receive control information for activating a secondary cell from a base station, to transmit first information including channel status information (CSI) for the secondary cell in a first subframe, and to transmit second information including sounding reference signal (SRS) for the secondary cell no earlier than the first subframe,

wherein the first information is transmitted in a subframe n+8, if the control information is received in a subframe n.

6. The terminal of claim 5, wherein the first information includes channel quality indicator (CQI).

7. The terminal of claim 5, wherein a time interval between receiving the control information and transmitting the first information is a time corresponding to 8 subframes.

8. The terminal of claim 5,

wherein the second information is transmitted no later than a second subframe, and

wherein the second subframe is different from the first subframe.