Method for selecting HD mode or FD mode in wireless communication system supporting FDR scheme and apparatus therefor

A base station (BS) for selecting either a half duplex (HD) mode or a full duplex (FD) mode in a wireless communication system supporting a full duplex radio (FDR) scheme, the BS comprising:

• a receiver configured to receive, from a second user equipment (UE) which suffers interference from a first UE, a value related to a signal-to-noise ratio (SNR) of the second UE and a value related to a signal-to-interference-plus-noise ratio (SINR) of the second UE;
• and
• a processor configured to:
• measure SNR and SINR values of the BS;
• calculate a channel capacity ratio between the HD mode and FD mode using the value related to SNR of the second UE, the value related to SINR value of the second UE, the measured SNR value of the BS, and the measured SINR value of the BS, wherein the channel capacity ratio between the HD and FD modes is obtained based on an equation including
• log
• ⁢
• {
• (
• 1
• +
• SINR
• eNB
• )
• 2
• ⁢
• (
• 1
• +
• SINR
• victim
• )
• 2
• }
• log
• ⁢
• {
• (
• 1
• +
• SNR
• eNB
• )
• ⁢
• (
• 1
• +
• SNR
• victim
• )
• }
• ,
• wherein SNRvictim is the SNR of the second UE and SINRvictim is the SINR of the second UE;
• and
• select either the HD or FD mode based on the calculated channel capacity ratio, wherein when the calculated channel capacity ratio is compared with a specific threshold value and the ratio is lower than the specific threshold value, the HD mode is selected, and otherwise, the FD mode is selected.

A method for selecting either a half duplex (HD) mode or a full duplex (FD) mode by a first user equipment (UE) suffering interference from a neighboring UE in a wireless communication system supporting a full duplex radio (FDR) scheme, the method comprising:

• measuring signal-to-noise ratio (SNR) and signal-to-interference-plus-noise ratio (SINR) values of the first UE;
• calculating a value related to a channel capacity ratio between the HD mode and FD mode using a value related to SNR of the first UE, and a value related to SINR of the first UE, wherein the value related to the channel capacity ratio between the HD and FD modes is obtained based on an equation including (1+SINRvictim)2/(1+SNRvictim), wherein SINRvictim is the SINR of the first UE and SNRvictim is the SNR of the first UE;
• and
• selecting either the HD or FD mode based on the value related to the channel capacity ratio is compared with a specific threshold value and the ratio is lower than the specific threshold value, the HD mode is selected, and otherwise, the FD mode is selected.

A first user equipment (UE) for selecting either a half duplex (HD) mode or a full duplex (FD) mode in a wireless communication system supporting a full duplex radio (FDR) scheme, wherein the first UE suffers interference from a neighboring UE, the first UE comprising:

• a processor configured to:
• measure signal-to-noise ratio (SNR) and signal-to-interference-plus-noise ratio (SINR) values of the first UE;
• calculate a value related to a channel capacity ratio between the HD mode and FD mode using a value related to SNR of the first UE, and a value related to SINR of the first UE, wherein the value related to the channel capacity ratio between the HD and FD modes is obtained based on an equation including (1+SINRvictim)2/(1+SNRvictim), wherein SINRvictim is the SINR of the first UE and SNRvictim is the SNR of the first UE;
• and
• select either the HD or FD mode based on the value related to the channel capacity ratio is compared with a specific threshold value and the ratio is lower than the specific threshold value, the HD mode is selected, and otherwise, the FD mode is selected.