A wireless communication system in which each of a plurality of base stations that manage cells is capable of communication with base stations that manage cells that are adjacent to the cell that said base station manages, wherein each of said plurality of base stations has a control unit that: is configured to receive cell information from peripheral base stations, that are base stations that manage cells that are adjacent to a cell that said base station manages, the cell information including information of cell identifiers that are assigned to cells that are adjacent to the cells that said peripheral base stations manage; is configured to supply cell information to said peripheral base stations, the cell information including information of cell identifiers that are assigned to cells that are adjacent to said cell that said base station manages; is configured to determine a candidate cell identifier that is intended to be assigned to a cell that said base station manages based on the cell information received from said peripheral base stations; is configured to, prior to assigning the candidate cell identifier to said cell that said base station manages, supply to said peripheral base stations a determination request that requests whether or not the candidate cell identifier can be assigned to said cell that the base station manages, and when, in response to said determination request, permission to assign said candidate cell identifier to said cell is supplied from said peripheral base stations, is configured to assign said candidate cell identifier to said cell that said base station manages; and is configured to, when a determination request that requests whether or not to assign a candidate cell identifier is supplied from a peripheral base station, determine whether or not said candidate cell identifier can be assigned to said cell managed by said peripheral base station according to the cell identifiers that are assigned to cells that are adjacent to said cell that said base station manages, and is configured to supply a result of determination to said peripheral base station that originated said determination request. is configured to receive cell information from peripheral base stations, that are base stations that manage cells that are adjacent to a cell that said base station manages, the cell information including information of cell identifiers that are assigned to cells that are adjacent to the cells that said peripheral base stations manage; is configured to supply cell information to said peripheral base stations, the cell information including information of cell identifiers that are assigned to cells that are adjacent to said cell that said base station manages; is configured to determine a candidate cell identifier that is intended to be assigned to a cell that said base station manages based on the cell information received from said peripheral base stations; is configured to, prior to assigning the candidate cell identifier to said cell that said base station manages, supply to said peripheral base stations a determination request that requests whether or not the candidate cell identifier can be assigned to said cell that the base station manages, and when, in response to said determination request, permission to assign said candidate cell identifier to said cell is supplied from said peripheral base stations, is configured to assign said candidate cell identifier to said cell that said base station manages; and is configured to, when a determination request that requests whether or not to assign a candidate cell identifier is supplied from a peripheral base station, determine whether or not said candidate cell identifier can be assigned to said cell managed by said peripheral base station according to the cell identifiers that are assigned to cells that are adjacent to said cell that said base station manages, and is configured to supply a result of determination to said peripheral base station that originated said determination request.