UPLINK TRANSISSION IN CARRIER AGGREGATION ENVIRONMENT

• US 20110261776A1
• Filed: 12/23/2009
• Published: 10/27/2011
• Est. Priority Date: 12/23/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jung Hoon, Seo, Dong Youn, Ahn, Joon Kui
• Granted Patent: US 8,649,343 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• 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: H04W 72/1268 of uplink data flows

Abstract

The present invention relates to a wireless communication system, and more particularly, to a method of uplink transmission, in which a user equipment transmits a signal in uplink in a wireless communication system. The present invention includes switching an uplink transmission mode used in transmitting the signal to a base station to either a first transmission mode or a second transmission mode, generating a plurality of signals to transmit to the base station via a plurality of component carriers (CCs), and transmitting a plurality of the signals to the base station according to the switched uplink transmission mode, wherein the first transmission mode allows multi-carrier characteristics for the signal transmitted via a plurality of the component carriers and wherein the second transmission mode requests single carrier characteristics for the signals transmitted via a plurality of the component carriers.

Claims

1. A method of uplink transmission, in which a user equipment transmits a signal in uplink in a wireless communication system, the method comprising the steps of:

switching an uplink transmission mode used in transmitting the signal to a base station to either a first transmission mode or a second transmission mode;

generating a plurality of signals to transmit to the base station via a plurality of component carriers (CCs); and

transmitting a plurality of the signals to the base station according to the switched uplink transmission mode,

wherein the first transmission mode allows multi-carrier characteristics for the signal transmitted via a plurality of the component carriers and wherein the second transmission mode requests single carrier characteristics for the signals transmitted via a plurality of the component carriers.

2. The method of claim 1, wherein the uplink transmission mode is switched using information signaled via an RRC (radio resource control) message or a downlink control channel.

3. The method of claim 1, wherein a plurality of the component carriers construct one of a plurality of component carrier groups included in a whole uplink band.

4. The method of claim 1, wherein the first transmission mode allows at least two physical channels to be simultaneously transmitted via a plurality of the component carriers.

5. The method of claim 4, wherein the first transmission mode allows PUSCH (physical plink shared channel) and PUCCH (physical uplink control channel) to be simultaneously transmitted via the same component carrier.

6. The method of claim 1, wherein the second transmission mode requests one physical channel to be transmitted via a plurality of the component carriers.

7. The method of claim 6, wherein the physical channel comprises either PUSCH or PUCCH.

8. A method of uplink transmission, in which a user equipment transmits a signal in uplink in a wireless communication system, the method comprising the steps of:

generating a plurality of control signals associated with different component carriers (CCs), respectively;

multiplexing a plurality of the control signals into a physical channel in a specific uplink component carrier (UL CC); and

transmitting a plurality of the control signals via the physical channel in the specific uplink component carrier (UL CC).

9. The method of claim 8, wherein each of a plurality of the control signals is scheduled to be transmitted via an originally different uplink component carrier.

10. The method of claim 8, wherein each of a plurality of the control signals is scheduled to be transmitted via an originally different PUCCH (physical uplink control channel).

11. The method of claim 8, wherein the physical channel comprises PUCCH (physical uplink control channel).

12. The method of claim 8, wherein the physical channel comprises PUSCH (physical uplink shared channel).

13. The method of claim 12, wherein the PUSCH is signaled to multiplex a plurality of the control signals only without data.

14. The method of claim 8, wherein the step of multiplexing a plurality of the control signals into the physical channel in the specific uplink component carrier (UL CC) is performed on whole uplink component carriers.

15. The method of claim 8, wherein the step of multiplexing a plurality of the control signals into the physical channel in the specific uplink component carrier (UL CC) is performed by an uplink component carrier (UL CC) group unit.