Apparatus and method for performing communication based on timing alignment error (TAE) in wireless communication system

A method performed by a terminal in a wireless communication system, the method comprising:

• transmitting, to a base station (BS), channel information including at least one of a channel quality indicator (CQI) or a sounding reference signal (SRS);
• receiving a signal from the BS;
• obtaining a decoder based on channel interference information determined based on the channel information;
• and
• decoding the signal based on the decoder,
• wherein the channel interference information comprises timing alignment error (TAE) interference information and multi-user interference information, and
• wherein the TAE interference information is determined based on an interference amount between symbols of first radio access technology (RAT) and symbols of second RAT allocated to the signal.

A method performed by a digital unit (DU) in a wireless communication system, the method comprising:

• obtaining channel interference information based on channel information including at least one of a channel quality indicator (CQI) or a sounding reference signal (SRS);
• obtaining a precoder based on the channel interference information;
• and
• transmitting the precoder to a radio unit (RU),
• wherein TAE interference information is determined based on an interference amount between symbols of first radio access technology (RAT) and symbols of second RAT allocated to a transmit signal, and
• wherein the channel information is received from at least one terminal.

A base station comprising:

• a transceiver;
• and
• a processor;
• and
• memory storing instructions that, when executed by the processor, cause the base station to:
• receive, from at least one terminal, channel information including at least one of a channel quality indicator (CQI) or a sounding reference signal (SRS),
• obtain channel interference information including timing alignment error (TAE) interference information and multi-user interference information based on the channel information,
• obtain a precoder based on the channel interference information, and
• transmit a signal to the at least one terminal based on the precoder,
• wherein the TAE interference information is determined based on an interference amount between symbols of first radio access technology (RAT) and symbols of second RAT allocated to the signal.

A terminal comprising:

• a transceiver;
• and
• a processor;
• and
• memory storing instructions that, when executed by the processor, cause the terminal to:
• transmit, to a base station (BS), channel information including at least one of a channel quality indicator (CQI) or a sounding reference signal (SRS),
• receive a signal from the BS,
• obtain a decoder based on channel interference information determined based on the channel information, and
• decode the signal based on the decoder,
• wherein the channel interference information comprises timing alignment error (TAE) interference information and multi-user interference information, and
• wherein the TAE interference information is determined based on an interference amount between symbols of first radio access technology (RAT) and symbols of second RAT allocated to the signal.