Patent ID: 7620032
Filing Date: 2009-11-17
Classification: H04W

Abstract:
1. A mobile station that performs telephone communication over a public telephone line or the Internet by radio via a switching unit that switches the telephone communication using the public telephone line and the telephone communication using the Internet, comprising: a radio communication level determination means for determining, when performing telephone communication using the public telephone line, whether a radio communication level of the telephone communication using the public telephone line is below a first reference value or a second reference value which is smaller than the first reference value and, when performing the telephone communication using the Internet, whether the radio communication level exceeds a third reference value; a location information acquisition means for acquiring location information of the mobile station when the radio communication level determination means determines that the radio communication level is below the first reference value; a transmission means for transmitting the location information acquired by the location information acquisition means to a network server on which wireless LAN spot information associated with an installation location of a wireless LAN spot for connecting to the wireless LAN spot is stored; a reception means for receiving the wireless LAN spot information transmitted from the network server in accordance with the location information transmitted by the transmission means; a wireless LAN connection means for establishing wireless LAN connection to a wireless LAN spot associated with the wireless LAN spot information based on the wireless LAN spot information received by the reception means; a call establishment means for establishing a call of telephone communication using the Internet with the switching unit via the wireless LAN spot to which the wireless LAN connection is established by the wireless LAN connection means when the radio communication level determination means determines that the radio communication level is below the second reference value, and for establishing a call of telephone communication using a public telephone line with the switching unit when the radio communication level determination means determines that the radio communication level exceeds the third reference value; and a communication means for performing telephone communication using the Internet via the switching unit after a call of telephone communication using the Internet is established with the switching unit by the call establishment means and for performing telephone communication using a public telephone line via the switching unit after a call of telephone communication using a public telephone line is established with the switching unit by the call establishment means.