Method for mitigating self-interference in FDR communication environment

• US 10,382,185 B2
• Filed: 12/15/2014
• Issued: 08/13/2019
• Est. Priority Date: 12/24/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Kitae, Chung, Jaehoon, Kim, Jinmin, Choi, Kukheon, Noh, Kwangseok
• Primary Examiner(s): Grey, Christopher P
• Application Number:
  US15/107,426
• Publication Number:
  US 20170005776A1
• Time in Patent Office: 1,702 Days
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Disclosed are a method and a base station for mitigating self-interference in which, in a resource region for transmitting a plurality of downlink control channels, an overlap region is configured, the overlap region being a resource region from which the effects of self-interference due to an uplink communication of a terminal must be removed, and the information regarding the overlap region is transmitted to a terminal connected to a base station and communicating via FDR.

Claims

1. A method of a base station (BS) mitigating self-interference in a full duplex radio (FDR) communication environment, the method comprising:

receiving information from a user equipment (UE), the information related to self-interference cancellation capacity of the UE;

setting an overlap region from resource regions for transmission of a plurality of downlink control channels, the overlap region corresponding to a resource region in which an influence of self-interference caused by uplink communication of the UE must be removed; and

transmitting information related to the set overlap region to one or more UEs connected to the BS in order to perform FDR communication,

wherein the overlap region is set based on the self-interference cancellation capacity with a size configured in inverse proportion to the self-interference cancellation capacity.

2. The method according to claim 1, wherein setting the overlap region comprises:

determining priority of the plurality of downlink control channels based on types of the plurality of downlink control channels; and

setting a resource region allocated to at least one of the plurality of downlink control channels to the overlap region, the at least one of the plurality of downlink channels selected in descending order of the determined priority.

3. The method according to claim 1, wherein the received information is configured as a bitmap that includes a protection setting index indicating types of the at least one of the plurality of downlink control channels, protection priority of the at least one of the plurality of downlink control channels, and the self-interference cancellation capacity.

4. The method according to claim 1, wherein setting the overlap region comprises setting a number of the resource regions to the overlap region in inverse proportion of the self-interference cancellation capacity.

5. The method according to claim 1, wherein transmitting the information comprises broadcasting the information.

6. The method according to claim 1, wherein the transmitted information indicates at least position, arrangement structure or size of the set overlap region.

7. A method of a user equipment (UE) mitigating self-interference in a full duplex radio (FDR) communication environment, the method comprising:

transmitting information to a base station (BS), the information related to self-interference cancellation capacity of the UE;

receiving information from the BS, the information related to a set overlap region corresponding to a resource region among resource regions for transmission of a plurality of downlink control channels in which an influence of self-interference caused by uplink communication to the BS must be removed; and

mitigating the self-interference from a resource region corresponding to the set overlap region, the resource region selected based on the received information from resource regions for transmission of uplink data channels,

wherein the overlap region is set based on the self-interference cancellation capacity with a size configured in inverse proportion to the self-interference cancellation capacity.

10. The method according to claim 7, wherein the transmitted information is configured as a bitmap that includes a protection setting index indicating types of the at least one of the plurality of downlink control channels, protection priority of the at least one of the plurality of downlink control channels, and the self-interference cancellation capacity.

11. The method according to claim 7, wherein the received information is broadcast.

12. The method according to claim 7, wherein the received information indicates at least position, arrangement structure or size of the set overlap region.

8. A BS for mitigating self-interference in a full duplex radio (FDR) communication environment, the BS comprising:

a transmitter configured to transmit information;

a receiver configured to receive information; and

a processor connected to the transmitter and the receiver and configured to;

control the receiver to receive information from a user equipment (UE), the information related to self-interference cancellation capacity of the UE;

set an overlap region from resource regions for transmission of a plurality of downlink control channels, the overlap region corresponding to a resource region in which an influence of self-interference caused by uplink communication of the UE must be removed; and

control the transmitter to transmit information related to the set overlap region to one or more UEs connected to the BS in order to perform FDR communication,

wherein the overlap region is set based on the self-interference cancellation capacity with a size configured in inverse proportion to the self-interference cancellation capacity.

13. The BS according to claim 8, wherein the processor is further configured to set the overlap region by:

determining priority of the plurality of downlink control channels based on types of the plurality of downlink control channels; and

setting a resource region allocated to at least one of the plurality of downlink control channels to the overlap region, the at least one of the plurality of downlink channels selected in descending order of the determined priority.

14. The BS according to claim 8, wherein the received information is configured as a bitmap that includes a protection setting index indicating types of the at least one of the plurality of downlink control channels, protection priority of the at least one of the plurality of downlink control channels, and the self-interference cancellation capacity.

15. The BS according to claim 8, wherein the processor is further configured to set the overlap region by setting a number of the resource regions to the overlap region in inverse proportion to the self-interference cancellation capacity.

16. The BS according to claim 8, wherein the processor is further configured to transmit the information by broadcasting.

9. A UE for mitigating self-interference in a full duplex radio (FDR) communication environment, the UE comprising:

a transmitter configured to transmit information;

a receiver configured to receive information; and

a processor connected to the transmitter and the receiver and configured to;

control the transmitter to transmit information to a base station (BS), the information related to self-interference cancellation capacity of the UE;

control the receiver to receive information from the BS, the information related to a set overlap region corresponding to a resource region among resource regions for transmission of a plurality of downlink control channels in which an influence of self-interference caused by uplink communication to the BS must be removed; and

mitigate the self-interference from a resource region corresponding to the set overlap region, the resource region selected based on the received information from among resource regions for transmission of uplink data channels,

wherein the overlap region is set based on the self-interference cancellation capacity with a size configured in inverse proportion to the self-interference cancellation capacity.

17. The UE according to claim 9, wherein the transmitted information is configured as a bitmap that includes a protection setting index indicating types of the at least one of the plurality of downlink control channels, protection priority of the at least one of the plurality of downlink control channels, and the self-interference cancellation capacity.

18. The UE according to claim 9, wherein the received information is broadcast.

19. The UE according to claim 9, wherein the received information indicates at least position, arrangement structure or size of the set overlap region.