Method and apparatus for managing system information in wireless communication system supporting multi-carriers

• US 8,817,646 B2
• Filed: 06/14/2010
• Issued: 08/26/2014
• Est. Priority Date: 06/22/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Sung Duck, Jung, Sung Hoon, Yi, Seung June, Lee, Young Dae, Park, Sung Jun
• Primary Examiner(s): Rutkowski, Jeffrey M
• Assistant Examiner(s): Lequang, John
• Application Number:
  US13/379,281
• Publication Number:
  US 20120099464A1
• Time in Patent Office: 1,534 Days
• Field of Search: 370236-255, 370276-282, 370389-469
• US Class Current: 370/252
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00

Abstract

Discussed are a method and an apparatus for managing system information in a wireless communication system supporting multi-carriers. According to one embodiment of the present invention, a method by which user equipment obtains system information in a wireless communication system supporting multi-carriers comprises the steps of: receiving from a base station a message including information related to modification to system information of one or more component carriers; determining whether the system information of a component carrier from among the plurality of component carriers, which is set to the user equipment, is to be modified, based on the information related to the modification to the system information of the one or more component carriers; and obtaining the modified system information of the component carrier set at the user equipment when it is determined that the system information of the component carrier set at the user equipment is to be modified.

Claims

1. A method of obtaining system information by a user equipment in a wireless communication system supporting multi-carriers, the method comprising:

receiving a message including information on a system information modification (systemInfoModification) of a plurality of component carriers from a base station;

determining whether the system information of each component carrier configured for the user equipment among the plurality of component carriers is to be modified, based on the information on the system information modification of the plurality of component carriers; and

obtaining the modified system information of at least one component carrier configured for the user equipment, if the system information of the at least one component carrier configured for the user equipment is determined to be modified,

wherein the information on the system information modification of the plurality of component carriers is the information indicating whether the system information for each of the plurality of component carriers is to be modified,

wherein the message is received only on one predetermined downlink component carrier among the plurality of component carriers, and the modified system information of one of the at least one component carrier is received by the user equipment on the one of the at least one component carrier,

wherein the at least one component carrier includes a component carrier other than the one predetermined component carrier, and

wherein receiving the message comprises monitoring a physical downlink control channel (PDCCH), and a cyclic redundancy check (CRC) code of PDCCH is masked with Paging-Radio Network Temporary Identifier (P-RNTI).

2. The method of claim 1, wherein the one predetermined downlink component carrier is a downlink primary component carrier or P-cell.

3. The method of claim 1, wherein receiving the message is performed in n^th modification period and wherein the obtaining the modified system information is performed in (n+1)^th modification period.

4. The method of claim 1, wherein the component carrier configured for the user equipment includes at least one of at least one uplink component carrier or at least one downlink component carrier configured for the user equipment.

5. The method of claim 1, wherein the message comprises a paging message.

6. A method of providing system information to a user equipment by a base station in a wireless communication system supporting multi-carriers, the method comprising:

transmitting a message including information on a system information modification (systemInfoModification) of a plurality of component carriers; and

transmitting a modified system information of at least one component carrier among the plurality of component carriers,

wherein the message including information on the system information modification of the plurality of component carriers is used to determine whether the system information of each component carrier configured for the user equipment among the plurality of component carriers is to be modified,

wherein the modified system information of the at least one component carrier is obtained by the user equipment as the modified system information of the at least one component carrier configured for the user equipment, if the system information of the at least one component carrier configured for the user equipment is determined to be modified,

wherein the information on the system information modification of the plurality of component carriers is the information indicating whether the system information for each of the plurality of component carriers is to be modified,

wherein the message is transmitted only on one predetermined downlink component carrier among the plurality of component carriers, and the modified system information of one of the at least one component carrier is transmitted to the user equipment on the one of the at least one component carrier,

wherein the at least one component carrier includes a component carrier other than the one predetermined component carrier, and

wherein the message is transmitted via a physical downlink control channel (PDCCH), and a cyclic redundancy check (CRC) code of the PDCCH is masked with Paging-Radio Network Temporary Identifier (P-RNTI).

7. The method of claim 6, wherein the one predetermined downlink component carrier is a downlink primary component carrier or P-cell.

8. The method of claim 6, wherein the transmitting the message is performed in n^th modification period and wherein the transmitting the modified system information is performed in (n+1)^th modification period.

9. The method of claim 6, wherein the component carrier configured for the user equipment includes at least one of at least one uplink component carrier or at least one downlink component carrier configured for the user equipment.

10. The method of claim 6, wherein the message comprises a paging message.

11. A user equipment for obtaining system information in a wireless communication system supporting multi-carriers, the user equipment comprising:

a processor comprising;

an RRC (Radio Resource Control) layer module performing a RRC connection control function including a paging;

a MAC (medium access control) layer module controlling signal transmission and reception set for the user equipment via the multi-carriers; and

a physical layer module functionally connected with the MAC layer module, the physical layer module performing the signal transmission and reception via the multi-carriers set for the user equipment,

the processor is configured to;

receive a message including information on a system information modification (systemInfoModification) of a plurality of component carriers from a base station,

determine whether the system information of each component carrier configured for the user equipment among the plurality of component carriers is to be modified, based on the information on the system information modification of the plurality of component carriers via the RRC layer module,

obtain the modified system information of at least one component carrier configured for the user equipment, if the system information of the at least one component carrier configured for the user equipment is determined to be modified,

wherein the information on the system information modification of the plurality of component carriers is the information indicating whether the system information for each of the plurality of component carriers is to be modified,

wherein the message is received only on one predetermined downlink component carrier among the plurality of component carriers, and the modified system information of one of the at least one component carrier is received by the user equipment on the one of the at least one component carrier,

wherein the at least one component carrier includes a component carrier other than the one predetermined component carrier, and

wherein receiving the message comprises monitoring a physical downlink control channel (PDCCH), and a cyclic redundancy check (CRC) code of PDCCH is masked with Paging-Radio Network Temporary Identifier (P-RNTI).

12. A base station for providing system information in a wireless communication system supporting multi-carriers, the base station comprising:

a processor comprising;

an RRC (radio resource control) layer module performing a RRC connection control function including a paging;

a MAC (medium access control) layer module controlling signal transmission and reception set for the user equipment via the multi-carriers; and

a physical layer module functionally connected with the MAC layer module, the physical layer module performing the signal transmission and reception via the multi-carriers,

the processor is configured to;

transmit a message including information on a system information modification (systemInfoModification) of a plurality of component carriers via the physical layer module and transmit a modified system information of at least one component carrier among the plurality of component carriers,

wherein the message including information on the system information modification of the plurality of component carriers is used by the user equipment to determine whether the system information of each component carrier configured for the user equipment among the plurality of component carriers is to be modified,

wherein the modified system information of the at least one component carrier is obtained by the user equipment as the modified system information of the at least one component carrier configured for the user equipment, if the system information of the at least one component carrier configured for the user equipment is determined to be modified,

wherein the information on the system information modification of the plurality of component carriers is the information indicating whether the system information for each of the plurality of component carriers is to be modified,

wherein the message is transmitted only on one predetermined downlink component carrier among the plurality of component carriers, and the modified system information of one of the at least one component carrier is transmitted to the user equipment on the one of the at least one component carrier,

wherein the at least one component carrier includes a component carrier other than the one predetermined component carrier, and

wherein the message is transmitted via a physical downlink control channel (PDCCH), and a cyclic redundancy check (CRC) code of the PDCCH is masked with Paging-Radio Network Temporary Identifier (P-RNTI).