Method for transceiving signal in wireless communication system, and apparatus therefor

• US 9,641,309 B2
• Filed: 12/02/2013
• Issued: 05/02/2017
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyunsoo, Kim, Jinmin, Chung, Jaehoon
• Primary Examiner(s): LY, ANH VU H
• Application Number:
  US14/443,874
• Publication Number:
  US 20150280887A1
• Time in Patent Office: 1,247 Days
• Field of Search: None
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04J 2011/0096 Network synchronisation
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• 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: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04W 56/001 Synchronization between nodes

Abstract

The present invention relates to a method for transceiving a signal in a wireless communication system. A method for transceiving a signal in a wireless communication system according to one embodiment of the present invention comprises the steps of: transmitting a downlink signal from a base station to a terminal; receiving an uplink signal transmitted from the terminal; and cancelling a self-interference signal on the basis of the transceived downlink signal or the uplink signal, wherein the transmission periods for the downlink signal and the uplink signal comprise dedicated transmission periods, and in the dedicated transmission period, signal transmission periods of the base station and the terminal are differentiated.

Claims

1. A method for transmitting and receiving a signal by a base station in a wireless communication system, the method comprising:

receiving a downlink signal transmitted from the base station without receiving an uplink signal from a user equipment during a dedicated transmission time interval;

wherein the dedicated transmission time interval includes a transmission time interval for the downlink signal and a transmission time interval for the uplink signal;

estimating a self-interference channel based on the received downlink signal;

receiving a self-interference signal and the uplink signal after the dedicated transmission time interval; and

cancelling the self-interference signal based on the estimated self-interference channel.

2. The method according to claim 1, wherein transmitting the downlink signal and receiving the uplink signal are performed simultaneously after the dedicated transmission time interval.

3. The method according to claim 1, further comprising:

wherein the transmission time interval for the downlink signal and the transmission time interval for the uplink signal are distinguished from each other in the dedicated transmission time interval.

4. The method according to claim 1, wherein receiving the downlink signal for estimating the self-interference channel is performed during the transmission time interval for the downlink signal in the dedicated transmission time interval.

5. The method according to claim 1,

wherein the self-interference signal corresponds to the downlink signal transmitted from the base station after the dedicated transmission time interval and the self-interference signal and the uplink signal are simultaneously received by the base station.

6. The method according to claim 1, further comprising:

wherein the transmission time interval for the uplink signal is configured for each of a plurality of user equipment located in a cell of the base station.

7. The method according to claim 1, wherein the transmission of the uplink signal and the downlink signal are performed in a same frequency band.

8. The method according to claim 1, wherein a subframe involved in transmitting the downlink signal from the base station to the user equipment comprises at least one of a physical broadcast channel (PBCH), a primary synchronization signal/secondary synchronization signal (PSS/SSS), a reference signal and data channel information.

9. The method according to claim 1, wherein a subframe involved in transmitting the uplink signal from the user equipment to the base station comprises at least one of a physical random access channel (PRACH), a sounding reference signal (SRS), a physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) information.

10. The method according to claim 1, wherein the self-interference signal is the downlink signal received by the base station after being transmitted from the base station.

11. The method according to claim 1, further comprising:

acquiring downlink synchronization information based on the downlink signal or the uplink signal.

12. A method for transmitting and receiving a signal by a base station in a wireless communication system, the method comprising:

receiving a downlink signal transmitted from the base station without receiving an uplink signal from a user equipment during a dedicated transmission time interval;

wherein the dedicated transmission time interval includes a transmission time interval for the downlink signal and a transmission time interval for the uplink signal;

estimating a self-interference channel based on the received downlink signal;

receiving a self-interference signal and an uplink signal from each of a plurality of user equipment after the dedicated transmission time interval; and

cancelling the self-interference signal based on the estimated self-interference channel, wherein, when a first user equipment of the plurality of user equipment transmits an uplink signal in a time interval, none of the other user equipment of the plurality of equipment transmits an uplink signal in the time interval.

13. The method according to claim 12, wherein the uplink signal transmitted by the first user equipment is received by at least one of the other user equipment of the plurality of user equipment.

14. The method according to claim 12, wherein the base station performs the transmitting and the receiving in the time interval.

15. A base station for transmitting and receiving a signal in a wireless communication system, comprising:

a transceiver; and

a processor that;

controls the transceiver to receive a downlink signal transmitted from the base station without receiving an uplink signal from a user equipment during a dedicated transmission time interval, wherein the dedicated transmission time interval includes a transmission time interval for the downlink signal and a transmission time interval for the uplink signal;

estimates a self-interference channel based on the received downlink signal,

controls the transceiver to receive a self-interference signal and the uplink signal after the dedicated transmission time interval, and

cancels the self-interference signal based on the estimated self-interference channel.