Patent ID: 6594505
Filing Date: 2003-07-15
Classification: H04W

Abstract:
A mobile radio system comprising:a first base station corresponding to a first mobile radio telephone system; a second base station corresponding to a second mobile radio telephone system; and a mobile telephone comprising: (a) a transmission signal processing means executing an orthogonal modulation over a transmission signal so as to transmit the signal as a radio wave to said first base station or said second base station through an antenna; and (b) a reception signal processing means receiving a transmission signal from said first base station or said second base station through said antenna so as to execute an orthogonal demodulation over the signal to demodulate and decode data; wherein the mobile telephone being programmed so that when said mobile phone is within a communication area of either said first base station or second base station, following a predetermined initial data communication protocol to compare a first mobile radio telephone system flag transmitted from said first base station or a second mobile radio telephone system flag transmitted from said second base station with an existing mobile radio telephone system: (a) in such case when the two system flags coincide with each other: executing a mobile radio telephone communication in accordance with an existing mobile radio telephone communication protocol; and (b) in such case when the two system flags do not coincide with each other: following said initial data communication protocol of the communication area of either said first base station or second base station where said mobile radio telephone is located, so as to download a first or a second mobile radio telephone communication protocol software, and executing a mobile radio telephone communication within said second communication area after downloading is completed; the mobile telephone further comprising a CPU, wherein response to a power supply, said CPU being programmed for: reading out a peripheral circuit setting parameter for a communication on the basis of a mobile radio telephone communication protocol corresponding to said first or second mobile radio telephone system stored in a storage means and controlling to set a pass of receiving circuit, reading out from said storage means an algorithm necessary for said reception signal processing means to demodulate and decode said mobile radio telephone communication protocol, reading out from said storage means an algorithm necessary for said transmission signal processing means to execute an orthogonal modulation over a transmission signal, controlling to set the peripheral circuit.