Method and device for managing connection mode mobility of remote terminal through relay terminal in wireless communication system

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

• transmitting, to a terminal, measurement configuration information;
• receiving, from the terminal, a measurement report including a first measurement result associated with at least one neighboring cell and a second measurement result associated with a sidelink relay terminal;
• identifying to switch the terminal to an indirect path via a target relay terminal;
• transmitting, to the target relay terminal, a first message including configuration information on a relay operation of the target relay terminal;
• transmitting, to the terminal, a second message including configuration information related with a path switch between a direct path and the indirect path;
• and
• receiving, from the terminal via the target relay terminal, a third message,
• wherein the second measurement result includes an identifier of the sidelink relay terminal, an identifier of a serving cell of the sidelink relay terminal, and a sidelink measurement result of the sidelink relay terminal.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a base station, measurement configuration information,
• transmit, to the base station, a measurement report including a first measurement result associated with at least one neighboring cell and a second measurement result associated with a sidelink relay terminal,
• receive, from the base station, a first message including configuration information related with a path switch between a direct path and an indirect path,
• establish a PC5 radio resource control (RRC) connection with a target relay terminal based on the first message, and
• transmit, to the base station via the target relay terminal, a second message,
• wherein the second measurement result includes an identifier of the sidelink relay terminal, an identifier of a serving cell of the sidelink relay terminal, and a sidelink measurement result of the sidelink relay terminal.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a terminal, measurement configuration information,
• receive, from the terminal, a measurement report including a first measurement result associated with at least one neighboring cell and a second measurement result associated with a sidelink relay terminal, and
• identify to switch the terminal to an indirect path via a target relay terminal,
• transmit, to the target relay terminal, a first message including configuration information on a relay operation of the target relay terminal,
• transmit, to the terminal, a second message including configuration information related with a path switch between a direct path and the indirect path;
• and
• receive, from the terminal via the target relay terminal, a third message,
• wherein the second measurement result includes an identifier of the sidelink relay terminal, an identifier of a serving cell of the sidelink relay terminal, and a sidelink measurement result of the sidelink relay terminal.