METHOD AND APPARATUS FOR INTERFERENCE CANCELLATION

• US 20150230259A1
• Filed: 02/06/2015
• Published: 08/13/2015
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Hanjun, Kim, Kijun, Hwang, Daesung
• Granted Patent: US 9,544,037 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04B 7/0862 receiver computing weights based on information from the transmitter

Abstract

A method and apparatus for performing interference cancellation is disclosed. The method includes receiving information about an interference configuration set related to characteristic of an interference signal, receiving an interference sequence signal indicating one interference configuration of the interference configuration set, and performing cancellation of the interference signal using the indicated interference configuration, wherein the interference sequence signal is received in at least a portion of a channel state information-interference measurement (CSI-IM) resource, and the interference sequence signal is received from an interference base station (BS) when the interference signal is scheduled to transmit and corresponds to the interference sequence signal.

Claims

1. A method for performing interference cancellation in a wireless communication system, which is performed by a terminal, the method comprising:

receiving information about an interference configuration set related to characteristic of an interference signal;

receiving an interference sequence signal indicating one interference configuration of the interference configuration set; and

performing cancellation of the interference signal using the indicated interference configuration,

wherein the interference sequence signal is transmitted in at least a portion of a channel state information-interference measurement (CSI-IM) resource; and

the interference sequence signal is received from an interference base station (BS) when the interference signal is scheduled to transmit and corresponds to the interference sequence signal.

2. The method according to claim 1, wherein:

the interference configuration set is configured with one or more interference configurations; and

each interference configuration comprises a plurality of fields indicating characteristic of the interference signal.

3. The method according to claim 1, further comprising receiving information of time in which the interference configuration set or separate interference configuration can be effectively used.

4. The method according to claim 1, wherein:

the interference sequence signal is mapped to each resource element (RE) corresponding to the at least a portion of the CSI-IM resource for all antenna ports; and

a seed value of the interference sequence signal is changed for the each RE according to a frequency, time, and a transmission antenna port.

5. The method according to claim 1, wherein:

the interference sequence signal is mapped to a resource element (RE) corresponding to at least a portion of the CSI-IM resource by applying an orthogonal cover code (OCC); and

a seed value of the interference sequence signal is changed for the each RE according to a frequency, time, and a transmission antenna port.

6. The method according to claim 1, wherein a seed value of the interference sequence signal is changed according to an interference configuration set or separate interference configuration configured for each respective frequency resource unit.

7. The method according to claim 1, wherein a seed value of the interference sequence signal is determined according to an offset value based on at least one of an index of a transmission antenna port and a frequency domain in which the interference signal is transmitted or a subframe index in which the interference sequence signal is transmitted.

8. A terminal configured to perform interference cancellation in a wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor configured to configure the RF unit,

wherein the processor is configured to receive information about an interference configuration set related to characteristic of an interference signal, to receive an interference sequence signal indicating one interference configuration of the interference configuration set, and to perform cancellation of the interference signal using the indicated interference configuration;

wherein the interference sequence signal is received in at least a portion of a channel state information-interference measurement (CSI-IM) resource; and

the interference sequence signal is received from an interference base station (BS) when the interference signal is scheduled to transmit and corresponds to the interference sequence signal.

9. The terminal according to claim 8, wherein:

the interference configuration set is configured with one or more interference configurations; and

each interference configuration comprises a plurality of fields indicating characteristic of the interference signal.

10. The terminal according to claim 8, wherein the processor is configured to receive information of time in which the interference configuration set or separate interference configuration can be effectively used.

11. The terminal according to claim 8, wherein:

the interference sequence signal is mapped to each resource element (RE) corresponding to the at least a portion of the CSI-IM resource for all antenna ports; and

a seed value of the interference sequence signal is changed for the each RE according to a frequency, time, and a transmission antenna port.

12. The terminal according to claim 8, wherein:

the interference sequence signal is mapped to a resource element (RE) corresponding to at least a portion of the CSI-IM resource by applying an orthogonal cover code (OCC); and

a seed value of the interference sequence signal is changed for the each RE according to a frequency, time, and a transmission antenna port.

13. The terminal according to claim 8, wherein a seed value of the interference sequence signal is changed according to an interference configuration set or separate interference configuration configured for each respective frequency resource unit.

14. The terminal according to claim 8, wherein a seed value of the interference sequence signal is determined according to an offset value based on at least one of an index of a transmission antenna port and a frequency domain in which the interference signal is transmitted or a subframe index in which the interference sequence signal is transmitted.