Method and apparatus for controlling power of base station in spectrum sharing environment

A method of controlling power of a base station in a spectrum sharing environment, the method comprising:

• setting, by a control device, predetermined initial power information for a plurality of base stations located in a service area in a time slot t;
• calculating, by the control device, a coverage radius for each of the base stations on the basis of the initial power information;
• calculating, by the control device, gradients of a coverage area and an interference area for each of the base stations on the basis of the coverage radius for each of the base stations;
• and
• updating, by the control device, power information for each of the base stations in a time slot t+1 on the basis of the gradients of each of the base stations,
• wherein the base stations provide communication for an incumbent terminal in the spectrum sharing environment, and
• wherein, when coverage areas of two or more base stations among the base stations overlap in the service area, the interference area is defined as an area obtained by removing a polygon area from an area where the coverage areas of the two or more base stations overlap;
• and
• the polygon area is defined by polygon vertices at points where center points of the two or more base stations and coverage boundaries of the two or more base stations meet.