Method and device for carrier activation in carrier aggregation system

• US 10,645,691 B2
• Filed: 06/11/2018
• Issued: 05/05/2020
• Est. Priority Date: 04/05/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Kyeong In, Van Lieshout, Gert Jan, Ng, Boon Loong, Kim, Soeng Hun
• Primary Examiner(s): Aung, Sai
• Application Number:
  US16/004,998
• Publication Number:
  US 20180302902A1
• Time in Patent Office: 694 Days
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a method and a device for cell activation in a carrier aggregation system, and the method for activating a cell of a terminal according to one embodiment of the present invention comprises: a step for receiving an activation message of a first cell; a step for activating the first cell when the message of the first cell is received; an information obtaining step for obtaining uplink activation information of the first cell; and a transmission determination step for determining whether to execute an uplink transmission according to the uplink activation information. According to an embodiment of the present invention, efficient carrier management plan can be provided.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a base station, a radio resource control (RRC) message including information on a timing advance group (TAG) of at least one secondary cell;

determining whether a timer associated with the TAG to which a serving cell belongs is running; and

not performing any uplink transmission on the serving cell except a random access preamble transmission in case that the timer associated with the TAG is not running.

2. The method of claim 1, further comprising:

in case that the timer associated with the TAG is running, performing the uplink transmission on the serving cell.

3. The method of claim 1,

wherein the TAG is a group of serving cells using a same timing advance value,

wherein the RRC message includes information for adding the at least one secondary cell, and

wherein the information on the TAG includes an identity of the TAG.

4. The method of claim 2, wherein the performing the uplink transmission comprises:

receiving scheduling information for the uplink transmission through a physical downlink control channel (PDCCH), and

performing the uplink transmission on the serving cell based on the scheduling information.

15. The method of claim 1, further comprising:

receiving a medium access control (MAC) control information including information for activating the at least one secondary cell;

receiving a PDCCH order in case that the timer associated with the TAG is not running;

performing, on a secondary cell associated with the TAG, the random access preamble transmission based on the PDCCH order;

receiving, on a primary cell, a random access response including a timing advance command as a response to the random access preamble transmission; and

applying the timing advance command for the TAG.

5. A method performed by a base station in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), a radio resource control (RRC) message including information on a timing advance group (TAG) of at least one secondary cell; and

receiving, from the UE, an uplink transmission on a serving cell in case that a timer associated with the TAG to which the serving cell belongs is running,

wherein any uplink transmission on the serving cell except a random access preamble transmission is not performed in case that the timer associated with the TAG is not running.

6. The method of claim 5,

wherein the TAG is a group of serving cells using a same timing advance value,

wherein the RRC message includes information for adding the at least one secondary cell, and

wherein the information on the TAG includes an identity of the TAG.

7. The method of claim 5, wherein the receiving the uplink transmission comprises:

transmitting, to the UE, scheduling information for the uplink transmission through a physical downlink control channel (PDCCH), and

receiving, from the UE, the uplink transmission on the serving cell based on the scheduling information.

16. The method of claim 5, further comprising:

transmitting, to the UE, a medium access control (MAC) control information including information for activating the at least one secondary cell;

receiving, from the UE, a PDCCH order in case that the timer associated with the TAG is not running;

receiving, on a secondary cell associated with the TAG, the random access preamble transmission based on the PDCCH order;

transmitting, on a primary cell, a random access response including a timing advance command as a response to the random access preamble transmission; and

applying the timing advance command for the TAG.

8. A user equipment (UE) in a wireless communication system, the UE comprising:

a transceiver; and

a controller configured to;

receive, from a base station via the transceiver, a radio resource control (RRC) message including information on a timing advance group (TAG) of at least one secondary cell,

determine whether a timer associated with the TAG to which a serving cell belongs is running, and

not perform any uplink transmission on the serving cell in case that the timer associated with the TAG is not running.

9. The UE of claim 8, wherein the controller is configured to perform the uplink transmission on the serving cell, in case that the timer associated with the TAG is running.

10. The UE of claim 8,

wherein the TAG is a group of serving cells using a same timing advance value,

wherein the RRC message includes information for adding the at least one secondary cell, and

wherein the information on the TAG includes an identity of the TAG.

11. The UE of claim 9, wherein the controller is further configured to:

receive, from the base station via the transceiver, scheduling information for the uplink transmission through a physical downlink control channel (PDCCH), and

perform the uplink transmission on the serving cell based on the scheduling information.

17. The UE of claim 8, wherein the controller is further configured to:

receive, via the transceiver, a medium access control (MAC) control information including information for activating the at least one secondary cell,

receive, via the transceiver, a PDCCH order in case that the timer associated with the TAG is not running,

perform, on a secondary cell associated with the TAG, the random access preamble transmission based on the PDCCH order,

receive, on a primary cell via the transceiver, a random access response including a timing advance command as a response to the random access preamble, and

apply the timing advance command for the TAG.

12. A base station in a wireless communication system, the base station comprising:

a transceiver; and

a controller configured to;

transmit, to a user equipment (UE) via the transceiver, a radio resource control (RRC) message including information on a timing advance group (TAG), and

receive, from the UE via the transceiver, an uplink transmission on a serving cell in case that a timer associated with the TAG to which the serving cell belongs is running,

wherein any uplink transmission on the serving cell except a random access preamble transmission is not performed in case that the timer associated with the TAG is not running.

13. The base station of claim 12,

wherein the TAG is a group of serving cells using a same timing advance value,

wherein the RRC message includes information for adding the at least one secondary cell, and

wherein the information on the TAG includes an identity of the TAG.

14. The base station of claim 12, wherein the controller is further configured to:

transmit, to the UE via the transceiver, scheduling information for the uplink transmission through a physical downlink control channel (PDCCH), and

receive, from the UE via the transceiver, the uplink transmission on the serving cell based on the scheduling information.

18. The base station of claim 12, wherein the controller is further configured to:

transmit, to the UE via the transceiver, a medium access control (MAC) control information including information for activating the at least one secondary cell,

receive, from the UE via the transceiver, a PDCCH order in case that the timer associated with the TAG is not running,

receive, on a secondary cell associated with the TAG, the random access preamble transmission based on the PDCCH order,

transmit, on a primary cell via the transceiver, a random access response including a timing advance command as a response to the random access preamble transmission, and

apply the timing advance command for the TAG.