METHOD FOR TERMINAL FOR TRANSMITTING UPLINK DATA IN FDR COMMUNICATION ENVIRONMENT

• US 20160323830A1
• Filed: 12/15/2014
• Published: 11/03/2016
• 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
• Granted Patent: US 10,110,364 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 terminal for transmitting data, the method comprising the steps of: determining, during FDR communication with a base station, an overlap region from among a resource region for transmitting an uplink data channel, the overlap region being the resource region for a downlink control channel received from the base station; mitigating the effects of self-interference in the overlap region due to an uplink communication; and transmitting the uplink data channel by means of the overlap region for which the effects of self-interference have been mitigated and the region excluding the overlap region from among the resource region for transmitting the uplink data channel.

Claims

1. A method of transmitting uplink data by a UE in a full duplex radio (FDR) communication environment, comprising:

determining an overlap region corresponding to a resource region of a downlink control channel received from a base station (BS) during PDR communication with the BS, from among resource regions for transmission of an uplink data channel;

mitigating an influence of self-interference caused by uplink communication on the overlap region; and

transmitting the uplink data channel through the overlap region in which the influence of self-interference has been mitigated and a region other than the overlap region, from among the resource regions for transmission of the uplink data channel.

2. The method according to claim 1, wherein the mitigating of self-interference comprises decreasing uplink transmit (Tx) power for the overlap region.

3. The method according to claim 2, wherein the mitigating of self-interference comprises controlling the uplink Tx power to be lower than a predetermined threshold value.

4. The method according to claim 2, wherein the mitigating of self-interference comprises controlling the uplink Tx power in consideration of self-interference cancellation performance of the UE.

5. The method according to claim 4, wherein the uplink Tx power increases as the self-interference cancellation performance increases.

6. The method according to claim 4, wherein the mitigating of self-interference comprises controlling the uplink Tx power in consideration of self-interference cancellation performance of the BS in addition to the self-interference cancellation performance of the UE.

7. The method according to claim 2, wherein the transmitting of the uplink data channel comprises transmitting information about the controlled uplink Tx power along with the uplink data channel

8. The method according to claim 2, wherein the transmitting of the uplink data channel comprises allocating a channel estimation reference signal to the overlap region, the channel estimation reference signal being discriminated form that allocated to a region other than the overlap region,

wherein the BS demodulates uplink data according to the controlled uplink Tx power by compensating for the uplink data channel transmitted through the overlap region through a channel estimated using the reference signal.

9. The method according to claim 1, wherein the mitigating of self-interference comprises adjusting a modulation and coding scheme (MCS) level with respect to the overlap region.

10. The method according to claim 9, wherein the mitigating of self-interference comprises applying, to the overlap region, an MCS with lower efficiency than that for a region other than the overlap region.

11. The method according to claim 9, wherein the mitigating of self-interference comprises adjusting the MCS level in consideration of an effective signal-to-interference-and-noise ratio (SINR) determined on the basis of the following Equation,

12. A UE for transmitting uplink data in an FDR communication environment, comprising:

a transmitter;

a receiver; and

a processor connected to the transmitter and the receiver to transmit uplink data, wherein the processor determines an overlap region corresponding to a resource region of a downlink control channel received from a BS during FDR communication with the BS, from among resource regions for transmission of an uplink data channel, mitigates an influence of self-interference caused by uplink communication on the overlap region and controls the transmitter to transmit the uplink data channel through the overlap region in which the influence of self-interference has been mitigated and a region other than the overlap region, from among the resource regions for transmission of the uplink data channel.