METHOD FOR MITIGATING INTER CELL INTERFERENCE AND DEVICE THEREFOR

• US 20130272261A1
• Filed: 12/20/2011
• Published: 10/17/2013
• Est. Priority Date: 12/21/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Lee, Seungmin, Ahn, Joonkui, Yang, Suckchel, Seo, Inkwon
• Granted Patent: US 9,949,244 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• 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 5/1469 using time-sharing
• 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 wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein the method comprises the steps of: receiving a PDCCH signal that contains scheduling information from a base station on a first subframe; receiving a PDSCH signal corresponding to said PDCCH signal from said base station on a second subframe; and decoding said PDSCH signal, wherein an interval between said first subframe and said second subframe is varied.

Claims

1. A method for receiving a downlink signal in a user equipment of a wireless communication system, the method comprising the steps of:

receiving a physical downlink control channel (PDCCH) signal, which includes scheduling information, from a base station on a first subframe;

receiving a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal, from the base station on a second subframe; and

decoding the PDSCH signal,

wherein an interval between the first subframe and the second subframe is varied.

2. The method according to claim 1, wherein the interval between the first subframe and the second subframe is varied by predetermined information within the PDCCH signal.

3. The method according to claim 1, wherein the interval between the first subframe and the second subframe is varied by considering at least one of carrier configuration for the user equipment and a value of a carrier indication field within the PDCCH signal.

4. The method according to claim 3, wherein, if a single carrier is configured for the user equipment, the value of the carrier indication field is used to indicate the second subframe, if a multi-carrier is configured for the user equipment, the value of the carrier indication field is used to indicate a carrier to which the PDSCH signal is transmitted, and the first subframe and the second subframe are given equally.

5. The method according to claim 3, wherein, if a single carrier is configured for the user equipment, the value of the carrier indication field is used to indicate the second subframe, and if a multi-carrier is configured for the user equipment, the value of the carrier indication field is used to indicate combination of the carrier to which the PDSCH signal is transmitted and the second subframe.

6. The method according to claim 1, further comprising the step of transmitting a physical uplink control channel (PUCCH) signal, which includes reception acknowledgement information for the PDSCH signal, on a third subframe, wherein a resource for the PUCCH signal is inferred from a resource used to transmit the PDCCH signal, and an index of the third subframe is inferred from that of the second subframe used to transmit the PDSCH signal.

7. The method according to claim 1, further comprising the step of transmitting a PUCCH signal, which includes reception acknowledgement information for the PDSCH signal, on a third subframe, wherein transmission of the PUCCH signal is dropped on the third subframe if an interval between the second subframe and the third subframe is smaller than a predetermined value.

8. A user equipment for use in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive a physical downlink control channel (PDCCH) signal, which includes scheduling information, from a base station on a first subframe, receive a physical downlink shared channel (PDSCH) signal corresponding to the PDCCH signal from the base station on a second subframe, and decode the PDSCH signal, and an interval between the first subframe and the second subframe is varied.

9. The user equipment according to claim 8, wherein the interval between the first subframe and the second subframe is varied by predetermined information within the PDCCH signal.

10. The user equipment according to claim 8, wherein the interval between the first subframe and the second subframe is varied by considering at least one of carrier configuration for the user equipment and a value of a carrier indication field within the PDCCH signal.

11. The user equipment according to claim 10, wherein, if a single carrier is configured for the user equipment, the value of the carrier indication field is used to indicate the second subframe, if a multi-carrier is configured for the user equipment, the value of the carrier indication field is used to indicate a carrier to which the PDSCH signal is transmitted, and the first subframe and the second subframe are given equally.

12. The user equipment according to claim 10, wherein, if a single carrier is configured for the user equipment, the value of the carrier indication field is used to indicate the second subframe, and if a multi-carrier is configured for the user equipment, the value of the carrier indication field is used to indicate combination of the carrier to which the PDSCH signal is transmitted and the second subframe.

13. The user equipment according to claim 8, wherein the processor is further configured to transmit a physical uplink control channel (PUCCH) signal, which includes reception acknowledgement information for the PDSCH signal, on a third subframe, a resource for the PUCCH signal is inferred from a resource used to transmit the PDCCH signal, and an index of the third subframe is inferred from that of the second subframe used to transmit the PDSCH signal.

14. The user equipment according to claim 8, wherein the processor is further configured to transmit a PUCCH signal, which includes reception acknowledgement information for the PDSCH signal, on a third subframe, and transmission of the PUCCH signal is dropped on the third subframe if an interval between the second subframe and the third subframe is smaller than a predetermined value.