Method and apparatus for transmitting and receiving signal in communication system

A method of a base station, comprising:

• transmitting, to an intermediate node relaying communication between the base station and a terminal, first control information including on/off indication and a transmission configuration indication (TCD) state to be applied by the intermediate node, which is used to relay the communication between the base station and the terminal;
• transmitting second control information to the intermediate node, wherein when the second control information is transmitted after transmitting the first control information, and when the first control information and the second control information are to be applied to a same time period an information element of the second control information is selected to be applied to the same time period, and the information element is at least one of the on/off indication of the TCI state;
• and
• performing communication with the terminal according to the on/off indication,
• wherein when the on/off indication indicates ‘on’, the communication between the base station and the terminal is relayed by the intermediate node, and
• wherein the communication between the base station and the terminal is relayed by the intermediate node that performs:
• transmitting a first signal received from the base station to the terminal;
• transmitting a second signal received from the terminal to the base station;
• transmitting a third signal generated by the intermediate node to the base station;
• and
• transmitting, to the base station, a fourth signal obtained by multiplexing a fifth signal generated by the intermediate node and a sixth signal received from the terminal.

An intermediate node for relaying communication between a base station and a terminal, comprising a processor,

• wherein the processor causes the intermediate node to perform:
• receiving, from the base station, first control information including on/off indication and a transmission configuration indication (TCI) state to be applied by the intermediate node, which is used to relay the communication between the base station and the terminal;
• determining whether to relay the communication between the base station and the terminal according to the on/off indication;
• relaying the communication between the base station and the terminal when the on/off indicates ‘on’;
• and
• receiving second control information from the base station, wherein the second control information is received after receiving the first control information, and when the first control information and the second control information are to be applied to a same time period, an information element of the second control information is selected to be applied to the same time period and the information element is at least one of the on/off indication or the TCI state,
• wherein the relaying of the communication comprises:
• transmitting a first signal received from the base station to the terminal;
• transmitting a second signal received from the terminal to the base station;
• transmitting a third signal generated by the intermediate node to the base station;
• and
• transmitting, to the base station, a fourth signal obtained by multiplexing a fifth signal generated by the intermediate node and a sixth signal received from the terminal.