Link adaptation method and device for dynamic time division duplex in wireless communication system
The present disclosure relates to a 5 th generation (5G) or pre-5G communication system for supporting higher data transmission rates than 4 th generation (4G) communication systems such as long term evolution (LTE). A method performed by a first base station in a wireless communication system includes: identifying a first signal-to-interference-noise ratio (SINR), based on channel state information received from a terminal; identifying a modulation and coding scheme (MCS), based on the first SINR and information on a link direction of a second base station; and transmitting information indicating the MCS to the terminal.
1 . A method performed by a first base station in a wireless communication system, the method comprising:
identifying a first signal-to-interference-noise ratio (SINR), based on channel state information received from a terminal;
transmitting, to the terminal, downlink data in a first slot;
receiving, from the terminal, a response to the downlink data;
determining an offset factor based on the response and a first link direction of a second base station in the first slot;
identifying a second SINR from the first SINR, based on the offset factor and a second link direction of the second base station in a second slot;
identifying a modulation and coding scheme (MCS), based on the second SINR; and
transmitting information indicating the MCS to the terminal.
2 . The method of claim 1 , wherein the identifying the first SINR comprises transmitting a downlink reference signal to the terminal, and
wherein the channel state information is based on the downlink reference signal.
3 . A method performed by a first base station in a wireless communication system, the method comprising:
identifying a first signal-to-interference-noise ratio (SINR), based on an uplink reference signal received from a terminal;
receiving, from the terminal, uplink data in a first slot;
decoding the uplink data;
determining an offset factor, based on a response to the uplink data based on the decoding, and a first link direction of a second base station in the first slot;
identifying a second SINR from the first SINR, based on the offset factor and a second link direction of the second base station in a second slot;
identifying a modulation and coding scheme (MCS), based on the second SINR; and
transmitting information indicating the MCS to the terminal.
4 . The method of claim 3 , wherein the uplink reference signal is a sounding reference signal (SRS).
5 . A first base station in a wireless communication system, the first base station comprising:
at least one transceiver; and
at least one processor operatively connected to the at least one transceiver,
wherein the at least one processor is configured to:
identify a first signal-to-interference-noise ratio (SINR), based on channel state information received from a terminal,
transmit, to the terminal, downlink data in a first slot,
receive, from the terminal, a response to the downlink data,
identify an offset factor based on the response and a first link direction of a second base station in the first slot,
identify a second SINR from the first SINR, based on the offset factor and a second link direction of the second base station in a second slot,
identify a modulation and coding scheme (MCS), based on the second SINR; and
transmit information indicating the MCS to the terminal.
6 . The first base station of claim 5 , wherein the at least one processor is further configured to transmit a downlink reference signal to the terminal, and
wherein the channel state information is based on the downlink reference signal.