Control apparatus, representative base station, and base station control method

A representative base station comprising:

• a first terminal information collection unit configured to acquire and collect a received power of a signal transmitted by each of a plurality of base stations and a physical cell ID of the base station transmits the signal, which are held by a communication terminal for wirelessly communicating with the self station;
• a second terminal information collection unit configured to acquire the received power and the physical cell ID which are collected by the first terminal information collection unit, and the received power and the physical cell ID which are collected by each of the plurality of base stations, and collect the acquired received powers and physical cell IDs;
• a map generator configured to determine based on the collected received powers and physical cell IDs whether the communication terminals are close to each other, extract, when it is determined that communication terminals are close to each other, a representative terminal by grouping together the communication terminals which are close to each other, and generate a map indicating a distribution of the representative terminals;
• a terminal information accumulation unit configured to accumulate the map generated by the map generator;
• a parameter calculator configured to set operating frequencies and transmission powers for the base stations, empirically estimate, based on past maps accumulated in the terminal information accumulation unit, received powers of the representative terminals generated by the operating frequencies and transmission powers sets by simulation, and determine new operating frequencies and transmission powers for the base stations based on the estimation result;
• and
• a parameter setting unit configured to set the new operating frequencies and transmission powers in the base stations.

A base station control method for a wireless communication system including

• a plurality of base stations which are distributed and arranged in a local network and each of which wirelessly communicates with a plurality of communication terminals and acquires, from each of the plurality of communication terminals for wireless communication, a received power of a signal transmitted by each of the plurality of base stations and a physical cell ID of the base station that transmits the signal, and
• a control apparatus which acquires the received powers and the physical cell IDs from the plurality of base stations, and controls the plurality of base stations based on the acquired received powers and physical cell IDs,
• the method comprising:
• collecting the received powers and physical cell IDs acquired from the plurality of base stations;
• determining based on the collected received powers and physical cell IDs whether the communication terminals are close to each other, extracting, when it is determined that communication terminals are close to each other, a representative terminal by grouping together the communication terminals which are close to each other, and generating a map indicating a distribution of the representative terminals;
• accumulating the generated map;
• setting operating frequencies and transmission powers for the base stations by simulation, empirically estimating, based on accumulated past maps, received powers of the representative terminals generated by the operating frequencies and transmission powers sets by simulation, and determining new operating frequencies and transmission powers for the base stations based on the estimation result;
• and
• setting the new operating frequencies and transmission powers in the base stations.