METHOD FOR OPERATING SERVING CELL IN WIRELESS COMMUNICATION SYSTEM TO WHICH CARRIER AGGREGATION SCHEME IS APPLIED AND DEVICE FOR SAME

• US 20150189516A1
• Filed: 07/12/2013
• Published: 07/02/2015
• Est. Priority Date: 07/23/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Jung, Sunghoon
• Granted Patent: US 9,565,572 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 36/0009 for a plurality of users or terminals, e.g. group communication or moving wireless networks user group management H04W4/08; processing of subscriber group data H04W8/186
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method for operating a serving cell by a user equipment (UE) in a wireless communication system is disclosed. Specifically, the method comprises the steps of: forming a plurality of secondary cells (SCells), as one group, corresponding to a same frequency band through an upper layer; setting an enabled first SCell among the plurality of SCells as the serving cell and transmitting and receiving signals with a network; receiving a serving cell configuration message from the network to disable the first Scell and enable a second SCell; and setting the enabled second SCell as the serving cell and transmitting and receiving signals with the network.

Claims

1. A method for operating a serving cell at a user equipment (UE) in a wireless communication system, the method comprising:

configuring a plurality of secondary cells (SCells) corresponding to the same frequency band as one group via a higher layer;

configuring an activated first SCell among the plurality of SCells as the serving cell to transmit and receive a signal to and from a network;

receiving a serving cell configuration message from the network to deactivate the first SCell and activate a second SCell; and

configuring the activated second SCell as the serving cell to transmit and receive the signal to and from the network.

2. The method according to claim 1, further comprising configuring one primary cell (PCell), which is always activated, as the serving cell to transmit and receive the signal to and from the network.

3. The method according to claim 1, wherein the serving cell configuration message is included in a medium access control (MAC) control element (CE).

4. The method according to claim 1, wherein:

the plurality of SCells configuring the group is identified by different carrier indicator field values, and

the serving cell configuration message includes information about one of the different carrier indicator field values.

5. The method according to claim 1, wherein:

the plurality of SCells configuring the group is identified by the same cell identifier and the same carrier indicator field value, and

the serving cell configuration message includes configuration information of a signal transmitted and received to and from the second SCell.

6. The method according to claim 5, wherein the configuration information of signals transmitted and received to and from the plurality of SCells is different.

7. The method according to claim 2, wherein a frequency band corresponding to the plurality of SCells is higher than a frequency band of the PCell.

8. The method according to claim 2, wherein coverage of the plurality of SCells is included in coverage of the PCell.

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

a wireless communication module configured to transmit and receive a signal to and from a network; and

a processor configured to process the signal,

wherein the processor controls the wireless communication module to configure a plurality of secondary cells (SCells) corresponding to the same frequency band as one group via a higher layer, to configure an activated first SCell among the plurality of SCells as the serving cell to transmit and receive a signal to and from the network, to deactivate the first SCell and activate a second SCell upon receiving a serving cell configuration message from the network and to configure the activated second SCell as the serving cell to transmit and receive the signal to and from the network.

10. The UE apparatus according to claim 9, wherein the processor controls the wireless communication module to configure one primary cell (PCell), which is always activated, as the serving cell to transmit and receive the signal to and from the network.

11. The UE apparatus according to claim 9, wherein the serving cell configuration message is included in a medium access control (MAC) control element (CE).

12. The UE apparatus according to claim 9, wherein:

the plurality of SCells configuring the group is identified by different carrier indicator field values, and

the serving cell configuration message includes information about one of the different carrier indicator field values.

13. The UE apparatus according to claim 9, wherein:

the plurality of SCells configuring the group is identified by the same cell identifier and the same carrier indicator field value, and

the serving cell configuration message includes configuration information of a signal transmitted and received to and from the second SCell.

14. The UE apparatus according to claim 13, wherein the configuration information of signals transmitted and received to and from the plurality of SCells is different.

15. The UE apparatus according to claim 10, wherein a frequency band corresponding to the plurality of SCells is higher than a frequency band of the PCell.

16. The UE apparatus according to claim 10, wherein coverage of the plurality of SCells is included in coverage of the PCell.