METHOD FOR RECEIVING AND TRANSMITTING ACK/NACK INFORMATION, USER EQUIPMENT, AND BASE STATION

• US 20130315115A1
• Filed: 03/21/2012
• Published: 11/28/2013
• Est. Priority Date: 03/21/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jinmin, Han, Seunghee, Lee, Hyunwoo
• Granted Patent: US 9,549,327 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

The present invention provides a method and an apparatus for mitigating/eliminating interference between adjacent cells by configuring a subframe subset, in which the downlink transmission/reception of a specific cell to be user equipment-specific is limited. According to the present invention, the transmission/reception of a downlink signal for a specific user equipment in the subframe in which the downlink transmission/reception of the specific cell is limited, thereby mitigating/eliminating interference from an uplink of a different cell with the downlink of the specific cell from a base station to the specific user equipment.

Claims

1. A method for receiving, by a user equipment operating in time division duplex (TDD) mode, acknowledgement/negative acknowledgement (ACK/NACK) information from a base station, comprising:

receiving information indicating a subframe subset including one or more subframes from the base station; and

receiving the ACK/NACK information at a transmission timing of the ACK/NACK information when the transmission timing does not belong to the subframe subset.

2. The method according to claim 1, wherein the subframe subset is user-specifically configured.

3. The method according to claim 1, wherein the ACK/NACK information is received in an available downlink subframe after the transmission timing when the transmission timing belongs to the subframe subset.

4. A method for transmitting, by a base station, acknowledgement/negative acknowledgement (ACK/NACK) information to a user equipment operating in time division duplex (TDD) mode, comprising:

transmitting information indicating a subframe subset including one or more subframes to the user equipment; and

dropping the ACK/NACK information at a transmission timing of the ACK/NACK information when the transmission timing belongs to the subframe subset, and transmitting the ACK/NACK information at the transmission timing when the transmission timing does not belong to the subframe subset.

5. The method according to claim 4, wherein the subframe subset is user-specifically configured.

6. The method according to claim 5, wherein a TDD downlink-uplink configuration used in the user equipment is different from a TDD downlink-uplink configuration of a radio frame used in another base station adjacent to the base station.

7. The method according to claim 4, wherein the ACK/NACK information is transmitted in an available downlink subframe after the transmission timing when the transmission timing belongs to the subframe subset.

8. A user equipment operating in time division duplex (TDD) mode, for receiving acknowledgement/negative acknowledgement (ACK/NACK) information from a base station, comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor configured to control the RF unit;

wherein the processor controls the RF unit to receive information indicating a subframe subset including one or more subframes from the base station, and the processor controls the RF unit to receive the ACK/NACK information at a transmission timing of the ACK/NACK information when the transmission timing does not belong to the subframe subset.

9. The user equipment according to claim 8, wherein the subframe subset is user-specifically configured.

10. The user equipment according to claim 9, wherein a TDD downlink-uplink configuration used in the user equipment is different from a TDD downlink-uplink configuration of a radio frame used in another base station adjacent to the base station.

11. The user equipment according to claim 8, wherein the processor controls the RF unit to receive the ACK/NACK information in an available downlink subframe after the transmission timing when the transmission timing belongs to the subframe subset.

12. A base station for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information to a user equipment operating in time division duplex (TDD) mode, comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor configured to control the RF unit;

wherein the processor controls the RF unit to transmit information indicating a subframe subset including one or more subframes to the user equipment, the processor drops the ACK/NACK information at a transmission timing of the ACK/NACK information when the transmission timing belongs to the subframe subset, and the processor controls the RF unit to transmit the ACK/NACK information at the transmission timing when the transmission timing does not belong to the subframe subset.

13. The base station according to claim 12, wherein the processor is configured to user-specifically configure the subframe subset.

14. The base station according to claim 13, wherein a TDD downlink-uplink configuration used in the base station is different from a TDD downlink-uplink configuration of a radio frame used in another base station adjacent to the base station.

15. The base station according to claim 12, wherein the processor controls the RF unit to transmit the ACK/NACK information in an available downlink subframe after the transmission timing when the transmission timing belongs to the subframe subset.