Method and apparatus for allocating visible area in communication system having very large scale multiple input multiple output

A base station comprising at least one processor, wherein the at least one processor is configured to cause the base station to:

• receive, from a terminal, a first signal including information on a distance between the base station and the terminal and information on an array antenna size of the terminal;
• determine, based on the distance information between the base station and the terminal, a visibility region (VR) size criterion value for distinguishing far-field communication and near-field communication in an extra-large scale massive multiple-input multiple-output (XL-MIMO) antenna panel;
• divide the XL-MIMO antenna panel into a predetermined number of groups;
• transmit, to the terminal, reference signals (RSS) through representative antennas of the respective divided groups;
• receive, from the terminal, reference signal received powers (RSRPs) for the representative antennas;
• receive, from the terminal, service-related information of the terminal;
• and
• determine, based on the service-related information and the RSRPs for the representative antennas, a VR to be allocated to the terminal in the XL-MIMO antenna panel, such that the terminal is located in a far-field region or a near-field region distinguished by the VR size criterion value.

A method of a terminal, comprising:

• calculating a distance to a first base station based on a first reference signal (RS) received from the first base station;
• transmitting, to the first base station, a first signal including information on the calculated distance to the first base station and information on an array antenna size of the terminal;
• calculating a reference signal received power (RSRP) for each of second RSs received from the first base station;
• transmitting, to the first base station, a report message including information for identifying each of the second RSs and the RSRPs corresponding to the second RSs;
• transmitting, to the first base station, service-related information required by the terminal;
• and
• receiving, from the first base station, service-availability information indicating whether a service is available through a visibility region (VR),
• wherein the VR is composed of antennas in an extra-large scale massive multiple-input multiple-output (XL-MIMO) antenna panel of the first base station that are capable of communicating with the terminal.