Mobile telephone system capable of coping with a variety of mobile radio telephone systems by a single mobile radio telephone

• US 6,594,505 B1
• Filed: 07/07/1999
• Issued: 07/15/2003
• Est. Priority Date: 07/10/1998
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ishii, Junichi
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): CONTEE, JOY KIMBERLY
• Application Number:
  US09/349,352
• Time in Patent Office: 1,469 Days
• Field of Search: 455/552, 455/553, 455/550, 455/419, 455/448, 370/319, 370/465, 370/466, 370/469, 370/338, 370/335, 370/208, 375/220, 375/222, 375/141, 375/145
• US Class Current: 455/552.1
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A mobile telephone system is capable of coping with a number of different mobile radio telephone systems by a single mobile radio telephone. When a mobile radio telephone exists inside a communication area of a first mobile radio telephone system, in case when a first mobile radio telephone system flag of a first base station and an existing second mobile radio telephone system flag of a second base station coincide with each other, the mobile radio telephone is to execute a mobile radio telephone communication using an existing mobile radio telephone communication protocol software. When the first and the second mobile radio telephone system flags do not coincide with each other, as downloading of a first mobile radio telephone communication protocol software used in the first base station is completed, a mobile radio telephone communication starts. The mobile radio telephone also executes a mobile radio telephone communication after downloading a second mobile radio telephone communication protocol software.

Claims

1. 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.

2. A mobile telephone system as claimed in claim 1, wherein response to a power supply, said CPU being programmed for:

comparing a base station system flag, defined by processing contents of demodulating and decoding of said mobile radio telephone communication protocol by said reception signal processing means, with said mobile telephone system flag stored in said storage means, and in case when the two do not coincide as a result of the comparison, updating the system flag stored in, the storage means on the basis of data of said mobile radio telephone communication protocol.

3. A mobile radio system as claimed in claim 1, wherein;

said first base station is a base station in a dual mode of TDMA and FM.

4. A mobile radio system as claimed in claim 2, wherein;

said second base station is a base station in a dual mode of CDMA and FM.

5. A mobile radio system as claimed in claim 3, wherein;

said second base station is a base station in a dual mode of CDMA and FM.

6. A mobile radio system as claimed in claim 2, wherein;

said first mobile radio telephone system is a TDMA system.

7. A mobile radio system as claimed in claim 3, wherein;

said first mobile radio telephone system is a TDMA system.

8. A mobile radio system as claimed in claim 5, wherein;

said first mobile radio telephone system is a TDMA system.

9. A mobile radio system as claimed in claim 2, wherein;

said second mobile radio telephone system is a CDMA system.

10. A mobile radio system as claimed in claim 3, wherein;

said second mobile radio telephone system is a CDMA system.

11. A mobile radio system as claimed in claim 5, wherein;

said second mobile radio telephone system is a CDMA system.

12. A mobile radio system as claimed in claim 8, wherein;

said second mobile radio telephone system is a CDMA system.