Wireless communications system, wireless terminal device, indoor base station apparatus, and control apparatus for obtaining location information

An indoor base station apparatus comprising:

• a peripheral cell information obtaining unit configured to obtain peripheral cell information;
• a location information obtaining part configured to obtain location information from a base station located in a periphery of the indoor base station in a case where the indoor base station apparatus is located in a femtocell that cannot receive signals from a communications network or an outdoor cell, the location information indicative of a location in which the indoor base station apparatus is located;
• and
• a location registration requesting part configured to transmit a location registration request to an upper level apparatus;
• wherein when the location information obtaining part obtains the location information, the location registration requesting part transmits the location registration request including the obtained location information;
• wherein the location information obtaining part is configured to determine the location of the indoor base station apparatus based on a first time data included in the location information of the indoor base station apparatus and a second time data included in the peripheral cell information.