Device and system characterized by measurement, report, and change procedure by terminal for changing transmission/reception point, and base station procedure for supporting same

A method performed by a base station, the method comprising:

• transmitting, to a terminal via a first transmission and reception point (TRP), reference signal configuration information on the first TRP and reference signal configuration information on a second TRP;
• transmitting, to the terminal, a reference signal corresponding to the first TRP based on the reference signal configuration information on the first TRP and a reference signal corresponding to the second TRP based on the reference signal configuration information on the second TRP;
• receiving, from the terminal, a measurement result including measurement information on the reference signal corresponding to the first TRP and measurement information on the reference signal corresponding to the second TRP;
• determining a TRP change for the terminal based on the measurement result;
• transmitting, to the terminal via the first TRP, TRP change indication information including a beam identity of the second TRP;
• and
• transmitting downlink data from the second TRP to the terminal based on a configuration being changed as a response to the TRP change indication information.

A terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a first transmission and reception point (TRP), reference signal configuration information on the first TRP and reference signal configuration information on a second TRP,
• measure a reference signal corresponding to the first TRP based on the reference signal configuration information on the first TRP and a reference signal corresponding to the second TRP based on the reference signal configuration information on the second TRP,
• transmit, to the first TRP, a measurement result including measurement information on the reference signal corresponding to the first TRP and measurement information on the reference signal corresponding to the second TRP,
• receive, from the first TRP, TRP change indication information including a beam identity of the second TRP, and
• receive downlink information from the second TRP based on a configuration being changed as a response to receiving of the TRP change indication information.

A base station comprising:

• a transceiver;
• and
• a controller configured to:
• transmit, to a terminal via a first transmission and reception point (TRP), reference signal configuration information on the first TRP and reference signal configuration information on a second TRP,
• transmit, to the terminal, a reference signal corresponding to the first TRP based on the reference signal configuration information on the first TRP and a reference signal corresponding to the second TRP based on the reference signal configuration information on the second TRP,
• receive, from the terminal, a measurement result including measurement information on the reference signal corresponding to the first TRP and measurement information on the reference signal corresponding to the second TRP,
• determine a TRP change for the terminal based on the measurement result,
• transmit, to the terminal via the first TRP, TRP change indication information including a beam identity of the second TRP, and
• transmit downlink data from the second TRP to the terminal based on a configuration being changed as a response to the TRP change indication information.