Wireless communication system, wireless communication method, and base station

A wireless communication method associated with a wireless communication system having a plurality of base stations and a control station controlling said plurality of base stations;

• wherein:
• if said control station allocates to said plurality of base stations antenna patterns associated with directivity patterns for each of said plurality of frequency bands that can be used by the respective base stations and transmits, to respective ones of said plurality of base stations, parameters for associating said allocated antenna patterns with directivity patterns for each of said plurality of frequency bands;
• said plurality of base stations associate directivity patterns with the plurality of frequency bands on the basis of parameters received from the control station and transmits and receives signals to and from an antenna in accordance with the associated directivity patterns;
• and
• Walsh functions are used for the association of said antenna patterns with the directivity patterns, and the parameters transmitted from said control station to said plurality of respective base stations are Walsh function lengths and line numbers.

A control station carrying out control of a plurality of base stations, wherein:

• respective ones of said plurality of base stations are provided with an antenna having directivity and signal transmission and reception is carried out with patterns (below called “directivity patterns”) defined in a plurality of directions inside the cell covered by the base station;
• and
• the control station has an antenna pattern allocation table and, when allocating to said plurality of base stations antenna patterns associated with directivity patterns for each of the plurality of frequency bands and/or each of the plurality of time bands that can be utilized by the respective base stations, is configured to use Walsh functions for the association of said antenna patterns with the directivity patterns;
• to store and to manage in said antenna pattern allocation table a base station identity number and location information and the Walsh function length (N) and line number (L) corresponding to the allocated antenna patterns, for respective ones of said plurality of base stations;
• and
• to transmit, to respective ones of said plurality of base stations, an antenna allocation command and the Walsh function length and line number corresponding to the antenna patterns.

A base station provided with an antenna having directivity and carrying out signal transmission and reception with patterns (below called “directivity patterns”) defined in a plurality of directions inside the cell covered by the base station;

• and,
• on the basis of control from a control station controlling the base station, the base station is configured to change said directivity patterns for each of the plurality of frequency bands and/or each of the plurality of time bands that can be utilized by said base station, wherein said directivity pattern determination is carried out using Walsh functions;
• and said base station is configured to:
• receive the length and line number of the Walsh functions from said control station;
• associate said Walsh function length and line number with directivity patterns for each of the plurality of frequency bands and/or each of the plurality of time bands;
• and
• carry out transmission of signals from the antenna and reception of signals to the antenna on the basis of the associated directivity patterns.